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     42  1.7    mrg <h1 class="settitle">Host/Target specific installation notes for GCC</h1>
     43  1.7    mrg <a name="index-Specific-1"></a><a name="index-Specific-installation-notes-2"></a><a name="index-Target-specific-installation-3"></a><a name="index-Host-specific-installation-4"></a><a name="index-Target-specific-installation-notes-5"></a>
     44  1.7    mrg Please read this document carefully <em>before</em> installing the
     45  1.7    mrg GNU Compiler Collection on your machine.
     46  1.6    mrg 
     47  1.7    mrg    <p>Note that this list of install notes is <em>not</em> a list of supported
     48  1.7    mrg hosts or targets.  Not all supported hosts and targets are listed
     49  1.7    mrg here, only the ones that require host-specific or target-specific
     50  1.7    mrg information have to.
     51  1.6    mrg 
     52  1.7    mrg      <ul>
     53  1.7    mrg <li><a href="#aarch64-x-x">aarch64*-*-*</a>
     54  1.7    mrg <li><a href="#alpha-x-x">alpha*-*-*</a>
     55  1.7    mrg <li><a href="#alpha-dec-osf51">alpha*-dec-osf5.1</a>
     56  1.7    mrg <li><a href="#amd64-x-solaris210">amd64-*-solaris2.10</a>
     57  1.7    mrg <li><a href="#arm-x-eabi">arm-*-eabi</a>
     58  1.7    mrg <li><a href="#avr">avr</a>
     59  1.7    mrg <li><a href="#bfin">Blackfin</a>
     60  1.7    mrg <li><a href="#dos">DOS</a>
     61  1.7    mrg <li><a href="#x-x-freebsd">*-*-freebsd*</a>
     62  1.7    mrg <li><a href="#h8300-hms">h8300-hms</a>
     63  1.7    mrg <li><a href="#hppa-hp-hpux">hppa*-hp-hpux*</a>
     64  1.7    mrg <li><a href="#hppa-hp-hpux10">hppa*-hp-hpux10</a>
     65  1.7    mrg <li><a href="#hppa-hp-hpux11">hppa*-hp-hpux11</a>
     66  1.7    mrg <li><a href="#x-x-linux-gnu">*-*-linux-gnu</a>
     67  1.7    mrg <li><a href="#ix86-x-linux">i?86-*-linux*</a>
     68  1.7    mrg <li><a href="#ix86-x-solaris210">i?86-*-solaris2.10</a>
     69  1.7    mrg <li><a href="#ia64-x-linux">ia64-*-linux</a>
     70  1.7    mrg <li><a href="#ia64-x-hpux">ia64-*-hpux*</a>
     71  1.7    mrg <li><a href="#x-ibm-aix">*-ibm-aix*</a>
     72  1.7    mrg <li><a href="#iq2000-x-elf">iq2000-*-elf</a>
     73  1.7    mrg <li><a href="#lm32-x-elf">lm32-*-elf</a>
     74  1.7    mrg <li><a href="#lm32-x-uclinux">lm32-*-uclinux</a>
     75  1.7    mrg <li><a href="#m32c-x-elf">m32c-*-elf</a>
     76  1.7    mrg <li><a href="#m32r-x-elf">m32r-*-elf</a>
     77  1.7    mrg <li><a href="#m68k-x-x">m68k-*-*</a>
     78  1.7    mrg <li><a href="#m68k-uclinux">m68k-uclinux</a>
     79  1.7    mrg <li><a href="#mep-x-elf">mep-*-elf</a>
     80  1.7    mrg <li><a href="#microblaze-x-elf">microblaze-*-elf</a>
     81  1.7    mrg <li><a href="#mips-x-x">mips-*-*</a>
     82  1.7    mrg <li><a href="#mips-sgi-irix5">mips-sgi-irix5</a>
     83  1.7    mrg <li><a href="#mips-sgi-irix6">mips-sgi-irix6</a>
     84  1.7    mrg <li><a href="#nds32le-x-elf">nds32le-*-elf</a>
     85  1.7    mrg <li><a href="#nds32be-x-elf">nds32be-*-elf</a>
     86  1.7    mrg <li><a href="#nvptx-x-none">nvptx-*-none</a>
     87  1.7    mrg <li><a href="#powerpc-x-x">powerpc*-*-*</a>
     88  1.7    mrg <li><a href="#powerpc-x-darwin">powerpc-*-darwin*</a>
     89  1.7    mrg <li><a href="#powerpc-x-elf">powerpc-*-elf</a>
     90  1.7    mrg <li><a href="#powerpc-x-linux-gnu">powerpc*-*-linux-gnu*</a>
     91  1.7    mrg <li><a href="#powerpc-x-netbsd">powerpc-*-netbsd*</a>
     92  1.7    mrg <li><a href="#powerpc-x-eabisim">powerpc-*-eabisim</a>
     93  1.7    mrg <li><a href="#powerpc-x-eabi">powerpc-*-eabi</a>
     94  1.7    mrg <li><a href="#powerpcle-x-elf">powerpcle-*-elf</a>
     95  1.7    mrg <li><a href="#powerpcle-x-eabisim">powerpcle-*-eabisim</a>
     96  1.7    mrg <li><a href="#powerpcle-x-eabi">powerpcle-*-eabi</a>
     97  1.7    mrg <li><a href="#s390-x-linux">s390-*-linux*</a>
     98  1.7    mrg <li><a href="#s390x-x-linux">s390x-*-linux*</a>
     99  1.7    mrg <li><a href="#s390x-ibm-tpf">s390x-ibm-tpf*</a>
    100  1.7    mrg <li><a href="#x-x-solaris2">*-*-solaris2*</a>
    101  1.7    mrg <li><a href="#sparc-x-x">sparc*-*-*</a>
    102  1.7    mrg <li><a href="#sparc-sun-solaris2">sparc-sun-solaris2*</a>
    103  1.7    mrg <li><a href="#sparc-sun-solaris210">sparc-sun-solaris2.10</a>
    104  1.7    mrg <li><a href="#sparc-x-linux">sparc-*-linux*</a>
    105  1.7    mrg <li><a href="#sparc64-x-solaris2">sparc64-*-solaris2*</a>
    106  1.7    mrg <li><a href="#sparcv9-x-solaris2">sparcv9-*-solaris2*</a>
    107  1.7    mrg <li><a href="#c6x-x-x">c6x-*-*</a>
    108  1.7    mrg <li><a href="#tilegx-x-linux">tilegx-*-linux*</a>
    109  1.7    mrg <li><a href="#tilegxbe-x-linux">tilegxbe-*-linux*</a>
    110  1.7    mrg <li><a href="#tilepro-x-linux">tilepro-*-linux*</a>
    111  1.7    mrg <li><a href="#visium-x-elf">visium-*-elf</a>
    112  1.7    mrg <li><a href="#x-x-vxworks">*-*-vxworks*</a>
    113  1.7    mrg <li><a href="#x86-64-x-x">x86_64-*-*</a> amd64-*-*
    114  1.7    mrg <li><a href="#x86-64-x-solaris210">x86_64-*-solaris2.1[0-9]*</a>
    115  1.7    mrg <li><a href="#xtensa-x-elf">xtensa*-*-elf</a>
    116  1.7    mrg <li><a href="#xtensa-x-linux">xtensa*-*-linux*</a>
    117  1.7    mrg <li><a href="#windows">Microsoft Windows</a>
    118  1.7    mrg <li><a href="#x-x-cygwin">*-*-cygwin</a>
    119  1.7    mrg <li><a href="#x-x-interix">*-*-interix</a>
    120  1.7    mrg <li><a href="#x-x-mingw32">*-*-mingw32</a>
    121  1.7    mrg <li><a href="#os2">OS/2</a>
    122  1.7    mrg <li><a href="#older">Older systems</a>
    123  1.7    mrg </ul>
    124  1.7    mrg 
    125  1.7    mrg      <ul>
    126  1.7    mrg <li><a href="#elf">all ELF targets</a> (SVR4, Solaris 2, etc.) 
    127  1.7    mrg </ul>
    128  1.6    mrg 
    129  1.7    mrg    <p><!-- -------- host/target specific issues start here ---------------- -->
    130  1.7    mrg <hr /><a name="aarch64_002dx_002dx"></a>
    131  1.6    mrg 
    132  1.7    mrg <h3 class="heading"><a name="TOC0"></a>aarch64*-*-*</h3>
    133  1.6    mrg 
    134  1.7    mrg <p>Binutils pre 2.24 does not have support for selecting <samp><span class="option">-mabi</span></samp> and
    135  1.7    mrg does not support ILP32.  If it is used to build GCC 4.9 or later, GCC will
    136  1.7    mrg not support option <samp><span class="option">-mabi=ilp32</span></samp>.
    137  1.6    mrg 
    138  1.7    mrg    <p>To enable a workaround for the Cortex-A53 erratum number 835769 by default
    139  1.7    mrg (for all CPUs regardless of -mcpu option given) at configure time use the
    140  1.7    mrg <samp><span class="option">--enable-fix-cortex-a53-835769</span></samp> option.  This will enable the fix by
    141  1.7    mrg default and can be explicitly disabled during compilation by passing the
    142  1.7    mrg <samp><span class="option">-mno-fix-cortex-a53-835769</span></samp> option.  Conversely,
    143  1.7    mrg <samp><span class="option">--disable-fix-cortex-a53-835769</span></samp> will disable the workaround by
    144  1.7    mrg default.  The workaround is disabled by default if neither of
    145  1.7    mrg <samp><span class="option">--enable-fix-cortex-a53-835769</span></samp> or
    146  1.7    mrg <samp><span class="option">--disable-fix-cortex-a53-835769</span></samp> is given at configure time.
    147  1.6    mrg 
    148  1.7    mrg    <p>To enable a workaround for the Cortex-A53 erratum number 843419 by default
    149  1.7    mrg (for all CPUs regardless of -mcpu option given) at configure time use the
    150  1.7    mrg <samp><span class="option">--enable-fix-cortex-a53-843419</span></samp> option.  This workaround is applied at
    151  1.7    mrg link time.  Enabling the workaround will cause GCC to pass the relevant option
    152  1.7    mrg to the linker.  It can be explicitly disabled during compilation by passing the
    153  1.7    mrg <samp><span class="option">-mno-fix-cortex-a53-843419</span></samp> option.  Conversely,
    154  1.7    mrg <samp><span class="option">--disable-fix-cortex-a53-843419</span></samp> will disable the workaround by default. 
    155  1.7    mrg The workaround is disabled by default if neither of
    156  1.7    mrg <samp><span class="option">--enable-fix-cortex-a53-843419</span></samp> or
    157  1.7    mrg <samp><span class="option">--disable-fix-cortex-a53-843419</span></samp> is given at configure time.
    158  1.6    mrg 
    159  1.7    mrg    <p><hr /><a name="alpha_002dx_002dx"></a>
    160  1.6    mrg 
    161  1.7    mrg <h3 class="heading"><a name="TOC1"></a>alpha*-*-*</h3>
    162  1.6    mrg 
    163  1.7    mrg <p>This section contains general configuration information for all
    164  1.7    mrg alpha-based platforms using ELF (in particular, ignore this section for
    165  1.7    mrg DEC OSF/1, Digital UNIX and Tru64 UNIX).  In addition to reading this
    166  1.7    mrg section, please read all other sections that match your target.
    167  1.6    mrg 
    168  1.7    mrg    <p>We require binutils 2.11.2 or newer. 
    169  1.7    mrg Previous binutils releases had a number of problems with DWARF 2
    170  1.7    mrg debugging information, not the least of which is incorrect linking of
    171  1.7    mrg shared libraries.
    172  1.6    mrg 
    173  1.7    mrg    <p><hr /><a name="alpha_002ddec_002dosf51"></a>
    174  1.6    mrg 
    175  1.7    mrg <h3 class="heading"><a name="TOC2"></a>alpha*-dec-osf5.1</h3>
    176  1.6    mrg 
    177  1.7    mrg <p>Systems using processors that implement the DEC Alpha architecture and
    178  1.7    mrg are running the DEC/Compaq/HP Unix (DEC OSF/1, Digital UNIX, or Compaq/HP
    179  1.7    mrg Tru64 UNIX) operating system, for example the DEC Alpha AXP systems.
    180  1.6    mrg 
    181  1.7    mrg    <p>Support for Tru64 UNIX V5.1 has been removed in GCC 4.8.  As of GCC 4.6,
    182  1.7    mrg support for Tru64 UNIX V4.0 and V5.0 has been removed.  As of GCC 3.2,
    183  1.7    mrg versions before <code>alpha*-dec-osf4</code> are no longer supported.  (These
    184  1.7    mrg are the versions which identify themselves as DEC OSF/1.)
    185  1.6    mrg 
    186  1.7    mrg    <p><hr /><a name="amd64_002dx_002dsolaris210"></a>
    187  1.6    mrg 
    188  1.7    mrg <h3 class="heading"><a name="TOC3"></a>amd64-*-solaris2.1[0-9]*</h3>
    189  1.6    mrg 
    190  1.7    mrg <p>This is a synonym for &lsquo;<samp><span class="samp">x86_64-*-solaris2.1[0-9]*</span></samp>&rsquo;.
    191  1.6    mrg 
    192  1.7    mrg    <p><hr /><a name="arc_002dx_002delf32"></a>
    193  1.6    mrg 
    194  1.7    mrg <h3 class="heading"><a name="TOC4"></a>arc-*-elf32</h3>
    195  1.6    mrg 
    196  1.7    mrg <p>Use &lsquo;<samp><span class="samp">configure --target=arc-elf32 --with-cpu=</span><var>cpu</var><span class="samp"> --enable-languages="c,c++"</span></samp>&rsquo;
    197  1.7    mrg to configure GCC, with <var>cpu</var> being one of &lsquo;<samp><span class="samp">arc600</span></samp>&rsquo;, &lsquo;<samp><span class="samp">arc601</span></samp>&rsquo;,
    198  1.7    mrg or &lsquo;<samp><span class="samp">arc700</span></samp>&rsquo;.
    199  1.6    mrg 
    200  1.7    mrg    <p><hr /><a name="arc_002dlinux_002duclibc"></a>
    201  1.6    mrg 
    202  1.7    mrg <h3 class="heading"><a name="TOC5"></a>arc-linux-uclibc</h3>
    203  1.1    mrg 
    204  1.7    mrg <p>Use &lsquo;<samp><span class="samp">configure --target=arc-linux-uclibc --with-cpu=arc700 --enable-languages="c,c++"</span></samp>&rsquo; to configure GCC.
    205  1.1    mrg 
    206  1.7    mrg    <p><hr /><a name="arm_002dx_002deabi"></a>
    207  1.1    mrg 
    208  1.7    mrg <h3 class="heading"><a name="TOC6"></a>arm-*-eabi</h3>
    209  1.4    mrg 
    210  1.1    mrg <p>ARM-family processors.  Subtargets that use the ELF object format
    211  1.1    mrg require GNU binutils 2.13 or newer.  Such subtargets include:
    212  1.3  skrll <code>arm-*-netbsdelf</code>, <code>arm-*-*linux-*</code>
    213  1.3  skrll and <code>arm-*-rtemseabi</code>.
    214  1.7    mrg 
    215  1.7    mrg    <p>Building the Ada frontend commonly fails (an infinite loop executing
    216  1.7    mrg <code>xsinfo</code>) if the host compiler is GNAT 4.8.  Host compilers built from the
    217  1.7    mrg GNAT 4.6, 4.9 or 5 release branches are known to succeed.
    218  1.7    mrg 
    219  1.7    mrg    <p><hr /><a name="avr"></a>
    220  1.7    mrg 
    221  1.7    mrg <h3 class="heading"><a name="TOC7"></a>avr</h3>
    222  1.7    mrg 
    223  1.1    mrg <p>ATMEL AVR-family micro controllers.  These are used in embedded
    224  1.7    mrg applications.  There are no standard Unix configurations. 
    225  1.1    mrg See &ldquo;AVR Options&rdquo; in the main manual
    226  1.1    mrg for the list of supported MCU types.
    227  1.7    mrg 
    228  1.7    mrg    <p>Use &lsquo;<samp><span class="samp">configure --target=avr --enable-languages="c"</span></samp>&rsquo; to configure GCC.
    229  1.7    mrg 
    230  1.7    mrg    <p>Further installation notes and other useful information about AVR tools
    231  1.1    mrg can also be obtained from:
    232  1.7    mrg 
    233  1.7    mrg      <ul>
    234  1.7    mrg <li><a href="http://www.nongnu.org/avr/">http://www.nongnu.org/avr/</a>
    235  1.7    mrg <li><a href="http://www.amelek.gda.pl/avr/">http://www.amelek.gda.pl/avr/</a>
    236  1.7    mrg </ul>
    237  1.7    mrg 
    238  1.7    mrg    <p>We <em>strongly</em> recommend using binutils 2.13 or newer.
    239  1.7    mrg 
    240  1.7    mrg    <p>The following error:
    241  1.7    mrg <pre class="smallexample">     Error: register required
    242  1.7    mrg </pre>
    243  1.7    mrg    <p>indicates that you should upgrade to a newer version of the binutils.
    244  1.7    mrg 
    245  1.7    mrg    <p><hr /><a name="bfin"></a>
    246  1.7    mrg 
    247  1.7    mrg <h3 class="heading"><a name="TOC8"></a>Blackfin</h3>
    248  1.7    mrg 
    249  1.7    mrg <p>The Blackfin processor, an Analog Devices DSP. 
    250  1.1    mrg See &ldquo;Blackfin Options&rdquo; in the main manual
    251  1.7    mrg 
    252  1.7    mrg    <p>More information, and a version of binutils with support for this processor,
    253  1.1    mrg is available at <a href="http://blackfin.uclinux.org">http://blackfin.uclinux.org</a>
    254  1.7    mrg 
    255  1.7    mrg    <p><hr /><a name="cr16"></a>
    256  1.7    mrg 
    257  1.7    mrg <h3 class="heading"><a name="TOC9"></a>CR16</h3>
    258  1.7    mrg 
    259  1.5    mrg <p>The CR16 CompactRISC architecture is a 16-bit architecture. This
    260  1.5    mrg architecture is used in embedded applications.
    261  1.3  skrll 
    262  1.7    mrg    <p>See &ldquo;CR16 Options&rdquo; in the main manual for a list of CR16-specific options.
    263  1.7    mrg 
    264  1.7    mrg    <p>Use &lsquo;<samp><span class="samp">configure --target=cr16-elf --enable-languages=c,c++</span></samp>&rsquo; to configure
    265  1.7    mrg GCC for building a CR16 elf cross-compiler.
    266  1.7    mrg 
    267  1.7    mrg    <p>Use &lsquo;<samp><span class="samp">configure --target=cr16-uclinux --enable-languages=c,c++</span></samp>&rsquo; to
    268  1.7    mrg configure GCC for building a CR16 uclinux cross-compiler.
    269  1.7    mrg 
    270  1.7    mrg    <p><hr /><a name="cris"></a>
    271  1.7    mrg 
    272  1.7    mrg <h3 class="heading"><a name="TOC10"></a>CRIS</h3>
    273  1.7    mrg 
    274  1.1    mrg <p>CRIS is the CPU architecture in Axis Communications ETRAX system-on-a-chip
    275  1.1    mrg series.  These are used in embedded applications.
    276  1.7    mrg 
    277  1.7    mrg    <p>See &ldquo;CRIS Options&rdquo; in the main manual
    278  1.1    mrg for a list of CRIS-specific options.
    279  1.7    mrg 
    280  1.7    mrg    <p>There are a few different CRIS targets:
    281  1.7    mrg      <dl>
    282  1.7    mrg <dt><code>cris-axis-elf</code><dd>Mainly for monolithic embedded systems.  Includes a multilib for the
    283  1.7    mrg &lsquo;<samp><span class="samp">v10</span></samp>&rsquo; core used in &lsquo;<samp><span class="samp">ETRAX 100 LX</span></samp>&rsquo;. 
    284  1.7    mrg <br><dt><code>cris-axis-linux-gnu</code><dd>A GNU/Linux port for the CRIS architecture, currently targeting
    285  1.7    mrg &lsquo;<samp><span class="samp">ETRAX 100 LX</span></samp>&rsquo; by default. 
    286  1.1    mrg </dl>
    287  1.1    mrg 
    288  1.7    mrg    <p>For <code>cris-axis-elf</code> you need binutils 2.11
    289  1.1    mrg or newer.  For <code>cris-axis-linux-gnu</code> you need binutils 2.12 or newer.
    290  1.7    mrg 
    291  1.7    mrg    <p>Pre-packaged tools can be obtained from
    292  1.1    mrg <a href="ftp://ftp.axis.com/pub/axis/tools/cris/compiler-kit/">ftp://ftp.axis.com/pub/axis/tools/cris/compiler-kit/</a>.  More
    293  1.1    mrg information about this platform is available at
    294  1.1    mrg <a href="http://developer.axis.com/">http://developer.axis.com/</a>.
    295  1.7    mrg 
    296  1.7    mrg    <p><hr /><a name="dos"></a>
    297  1.7    mrg 
    298  1.7    mrg <h3 class="heading"><a name="TOC11"></a>DOS</h3>
    299  1.7    mrg 
    300  1.1    mrg <p>Please have a look at the <a href="binaries.html">binaries page</a>.
    301  1.7    mrg 
    302  1.7    mrg    <p>You cannot install GCC by itself on MSDOS; it will not compile under
    303  1.1    mrg any MSDOS compiler except itself.  You need to get the complete
    304  1.1    mrg compilation package DJGPP, which includes binaries as well as sources,
    305  1.1    mrg and includes all the necessary compilation tools and libraries.
    306  1.7    mrg 
    307  1.7    mrg    <p><hr /><a name="epiphany_002dx_002delf"></a>
    308  1.7    mrg 
    309  1.7    mrg <h3 class="heading"><a name="TOC12"></a>epiphany-*-elf</h3>
    310  1.7    mrg 
    311  1.7    mrg <p>Adapteva Epiphany. 
    312  1.3  skrll This configuration is intended for embedded systems.
    313  1.7    mrg 
    314  1.7    mrg    <p><hr /><a name="x_002dx_002dfreebsd"></a>
    315  1.7    mrg 
    316  1.7    mrg <h3 class="heading"><a name="TOC13"></a>*-*-freebsd*</h3>
    317  1.7    mrg 
    318  1.1    mrg <p>Support for FreeBSD 1 was discontinued in GCC 3.2.  Support for
    319  1.1    mrg FreeBSD 2 (and any mutant a.out variants of FreeBSD 3) was
    320  1.1    mrg discontinued in GCC 4.0.
    321  1.7    mrg 
    322  1.7    mrg    <p>In order to better utilize FreeBSD base system functionality and match
    323  1.3  skrll the configuration of the system compiler, GCC 4.5 and above as well as
    324  1.3  skrll GCC 4.4 past 2010-06-20 leverage SSP support in libc (which is present
    325  1.3  skrll on FreeBSD 7 or later) and the use of <code>__cxa_atexit</code> by default
    326  1.3  skrll (on FreeBSD 6 or later).  The use of <code>dl_iterate_phdr</code> inside
    327  1.7    mrg <samp><span class="file">libgcc_s.so.1</span></samp> and boehm-gc (on FreeBSD 7 or later) is enabled
    328  1.3  skrll by GCC 4.5 and above.
    329  1.7    mrg 
    330  1.7    mrg    <p>We support FreeBSD using the ELF file format with DWARF 2 debugging
    331  1.7    mrg for all CPU architectures.  You may use <samp><span class="option">-gstabs</span></samp> instead of
    332  1.7    mrg <samp><span class="option">-g</span></samp>, if you really want the old debugging format.  There are
    333  1.1    mrg no known issues with mixing object files and libraries with different
    334  1.1    mrg debugging formats.  Otherwise, this release of GCC should now match
    335  1.1    mrg more of the configuration used in the stock FreeBSD configuration of
    336  1.7    mrg GCC.  In particular, <samp><span class="option">--enable-threads</span></samp> is now configured by
    337  1.1    mrg default.  However, as a general user, do not attempt to replace the
    338  1.1    mrg system compiler with this release.  Known to bootstrap and check with
    339  1.1    mrg good results on FreeBSD 7.2-STABLE.  In the past, known to bootstrap
    340  1.1    mrg and check with good results on FreeBSD 3.0, 3.4, 4.0, 4.2, 4.3, 4.4,
    341  1.1    mrg 4.5, 4.8, 4.9 and 5-CURRENT.
    342  1.7    mrg 
    343  1.7    mrg    <p>The version of binutils installed in <samp><span class="file">/usr/bin</span></samp> probably works
    344  1.1    mrg with this release of GCC.  Bootstrapping against the latest GNU
    345  1.7    mrg binutils and/or the version found in <samp><span class="file">/usr/ports/devel/binutils</span></samp> has
    346  1.1    mrg been known to enable additional features and improve overall testsuite
    347  1.1    mrg results.  However, it is currently known that boehm-gc (which itself
    348  1.1    mrg is required for java) may not configure properly on FreeBSD prior to
    349  1.1    mrg the FreeBSD 7.0 release with GNU binutils after 2.16.1.
    350  1.7    mrg 
    351  1.7    mrg    <p><hr /><a name="ft32_002dx_002delf"></a>
    352  1.7    mrg 
    353  1.7    mrg <h3 class="heading"><a name="TOC14"></a>ft32-*-elf</h3>
    354  1.7    mrg 
    355  1.7    mrg <p>The FT32 processor. 
    356  1.7    mrg This configuration is intended for embedded systems.
    357  1.7    mrg 
    358  1.7    mrg    <p><hr /><a name="h8300_002dhms"></a>
    359  1.7    mrg 
    360  1.7    mrg <h3 class="heading"><a name="TOC15"></a>h8300-hms</h3>
    361  1.7    mrg 
    362  1.1    mrg <p>Renesas H8/300 series of processors.
    363  1.7    mrg 
    364  1.7    mrg    <p>Please have a look at the <a href="binaries.html">binaries page</a>.
    365  1.7    mrg 
    366  1.7    mrg    <p>The calling convention and structure layout has changed in release 2.6. 
    367  1.1    mrg All code must be recompiled.  The calling convention now passes the
    368  1.1    mrg first three arguments in function calls in registers.  Structures are no
    369  1.1    mrg longer a multiple of 2 bytes.
    370  1.7    mrg 
    371  1.7    mrg    <p><hr /><a name="hppa_002dhp_002dhpux"></a>
    372  1.7    mrg 
    373  1.7    mrg <h3 class="heading"><a name="TOC16"></a>hppa*-hp-hpux*</h3>
    374  1.7    mrg 
    375  1.1    mrg <p>Support for HP-UX version 9 and older was discontinued in GCC 3.4.
    376  1.7    mrg 
    377  1.7    mrg    <p>We require using gas/binutils on all hppa platforms.  Version 2.19 or
    378  1.1    mrg later is recommended.
    379  1.7    mrg 
    380  1.7    mrg    <p>It may be helpful to configure GCC with the
    381  1.7    mrg <a href="./configure.html#with-gnu-as"><samp><span class="option">--with-gnu-as</span></samp></a> and
    382  1.7    mrg <samp><span class="option">--with-as=...</span></samp> options to ensure that GCC can find GAS.
    383  1.7    mrg 
    384  1.7    mrg    <p>The HP assembler should not be used with GCC.  It is rarely tested and may
    385  1.7    mrg not work.  It shouldn't be used with any languages other than C due to its
    386  1.1    mrg many limitations.
    387  1.7    mrg 
    388  1.7    mrg    <p>Specifically, <samp><span class="option">-g</span></samp> does not work (HP-UX uses a peculiar debugging
    389  1.1    mrg format which GCC does not know about).  It also inserts timestamps
    390  1.1    mrg into each object file it creates, causing the 3-stage comparison test to
    391  1.1    mrg fail during a bootstrap.  You should be able to continue by saying
    392  1.7    mrg &lsquo;<samp><span class="samp">make all-host all-target</span></samp>&rsquo; after getting the failure from &lsquo;<samp><span class="samp">make</span></samp>&rsquo;.
    393  1.7    mrg 
    394  1.7    mrg    <p>Various GCC features are not supported.  For example, it does not support weak
    395  1.1    mrg symbols or alias definitions.  As a result, explicit template instantiations
    396  1.1    mrg are required when using C++.  This makes it difficult if not impossible to
    397  1.1    mrg build many C++ applications.
    398  1.7    mrg 
    399  1.7    mrg    <p>There are two default scheduling models for instructions.  These are
    400  1.1    mrg PROCESSOR_7100LC and PROCESSOR_8000.  They are selected from the pa-risc
    401  1.7    mrg architecture specified for the target machine when configuring. 
    402  1.1    mrg PROCESSOR_8000 is the default.  PROCESSOR_7100LC is selected when
    403  1.7    mrg the target is a &lsquo;<samp><span class="samp">hppa1*</span></samp>&rsquo; machine.
    404  1.7    mrg 
    405  1.7    mrg    <p>The PROCESSOR_8000 model is not well suited to older processors.  Thus,
    406  1.1    mrg it is important to completely specify the machine architecture when
    407  1.1    mrg configuring if you want a model other than PROCESSOR_8000.  The macro
    408  1.1    mrg TARGET_SCHED_DEFAULT can be defined in BOOT_CFLAGS if a different
    409  1.1    mrg default scheduling model is desired.
    410  1.7    mrg 
    411  1.7    mrg    <p>As of GCC 4.0, GCC uses the UNIX 95 namespace for HP-UX 10.10
    412  1.7    mrg through 11.00, and the UNIX 98 namespace for HP-UX 11.11 and later. 
    413  1.1    mrg This namespace change might cause problems when bootstrapping with
    414  1.1    mrg an earlier version of GCC or the HP compiler as essentially the same
    415  1.1    mrg namespace is required for an entire build.  This problem can be avoided
    416  1.7    mrg in a number of ways.  With HP cc, <samp><span class="env">UNIX_STD</span></samp> can be set to &lsquo;<samp><span class="samp">95</span></samp>&rsquo;
    417  1.7    mrg or &lsquo;<samp><span class="samp">98</span></samp>&rsquo;.  Another way is to add an appropriate set of predefines
    418  1.7    mrg to <samp><span class="env">CC</span></samp>.  The description for the <samp><span class="option">munix=</span></samp> option contains
    419  1.1    mrg a list of the predefines used with each standard.
    420  1.7    mrg 
    421  1.7    mrg    <p>More specific information to &lsquo;<samp><span class="samp">hppa*-hp-hpux*</span></samp>&rsquo; targets follows.
    422  1.7    mrg 
    423  1.7    mrg    <p><hr /><a name="hppa_002dhp_002dhpux10"></a>
    424  1.7    mrg 
    425  1.7    mrg <h3 class="heading"><a name="TOC17"></a>hppa*-hp-hpux10</h3>
    426  1.7    mrg 
    427  1.1    mrg <p>For hpux10.20, we <em>highly</em> recommend you pick up the latest sed patch
    428  1.1    mrg <code>PHCO_19798</code> from HP.
    429  1.7    mrg 
    430  1.7    mrg    <p>The C++ ABI has changed incompatibly in GCC 4.0.  COMDAT subspaces are
    431  1.1    mrg used for one-only code and data.  This resolves many of the previous
    432  1.1    mrg problems in using C++ on this target.  However, the ABI is not compatible
    433  1.1    mrg with the one implemented under HP-UX 11 using secondary definitions.
    434  1.7    mrg 
    435  1.7    mrg    <p><hr /><a name="hppa_002dhp_002dhpux11"></a>
    436  1.7    mrg 
    437  1.7    mrg <h3 class="heading"><a name="TOC18"></a>hppa*-hp-hpux11</h3>
    438  1.7    mrg 
    439  1.1    mrg <p>GCC 3.0 and up support HP-UX 11.  GCC 2.95.x is not supported and cannot
    440  1.1    mrg be used to compile GCC 3.0 and up.
    441  1.7    mrg 
    442  1.7    mrg    <p>The libffi and libjava libraries haven't been ported to 64-bit HP-UX and don't build.
    443  1.7    mrg 
    444  1.7    mrg    <p>Refer to <a href="binaries.html">binaries</a> for information about obtaining
    445  1.1    mrg precompiled GCC binaries for HP-UX.  Precompiled binaries must be obtained
    446  1.7    mrg to build the Ada language as it can't be bootstrapped using C.  Ada is
    447  1.1    mrg only available for the 32-bit PA-RISC runtime.
    448  1.7    mrg 
    449  1.7    mrg    <p>Starting with GCC 3.4 an ISO C compiler is required to bootstrap.  The
    450  1.7    mrg bundled compiler supports only traditional C; you will need either HP's
    451  1.1    mrg unbundled compiler, or a binary distribution of GCC.
    452  1.7    mrg 
    453  1.7    mrg    <p>It is possible to build GCC 3.3 starting with the bundled HP compiler,
    454  1.1    mrg but the process requires several steps.  GCC 3.3 can then be used to
    455  1.1    mrg build later versions.  The fastjar program contains ISO C code and
    456  1.7    mrg can't be built with the HP bundled compiler.  This problem can be
    457  1.1    mrg avoided by not building the Java language.  For example, use the
    458  1.7    mrg <samp><span class="option">--enable-languages="c,c++,f77,objc"</span></samp> option in your configure
    459  1.1    mrg command.
    460  1.7    mrg 
    461  1.7    mrg    <p>There are several possible approaches to building the distribution. 
    462  1.1    mrg Binutils can be built first using the HP tools.  Then, the GCC
    463  1.1    mrg distribution can be built.  The second approach is to build GCC
    464  1.7    mrg first using the HP tools, then build binutils, then rebuild GCC. 
    465  1.1    mrg There have been problems with various binary distributions, so it
    466  1.1    mrg is best not to start from a binary distribution.
    467  1.7    mrg 
    468  1.7    mrg    <p>On 64-bit capable systems, there are two distinct targets.  Different
    469  1.1    mrg installation prefixes must be used if both are to be installed on
    470  1.7    mrg the same system.  The &lsquo;<samp><span class="samp">hppa[1-2]*-hp-hpux11*</span></samp>&rsquo; target generates code
    471  1.7    mrg for the 32-bit PA-RISC runtime architecture and uses the HP linker. 
    472  1.7    mrg The &lsquo;<samp><span class="samp">hppa64-hp-hpux11*</span></samp>&rsquo; target generates 64-bit code for the
    473  1.1    mrg PA-RISC 2.0 architecture.
    474  1.7    mrg 
    475  1.7    mrg    <p>The script config.guess now selects the target type based on the compiler
    476  1.7    mrg detected during configuration.  You must define <samp><span class="env">PATH</span></samp> or <samp><span class="env">CC</span></samp> so
    477  1.7    mrg that configure finds an appropriate compiler for the initial bootstrap. 
    478  1.7    mrg When <samp><span class="env">CC</span></samp> is used, the definition should contain the options that are
    479  1.7    mrg needed whenever <samp><span class="env">CC</span></samp> is used.
    480  1.7    mrg 
    481  1.7    mrg    <p>Specifically, options that determine the runtime architecture must be
    482  1.7    mrg in <samp><span class="env">CC</span></samp> to correctly select the target for the build.  It is also
    483  1.7    mrg convenient to place many other compiler options in <samp><span class="env">CC</span></samp>.  For example,
    484  1.7    mrg <samp><span class="env">CC="cc -Ac +DA2.0W -Wp,-H16376 -D_CLASSIC_TYPES -D_HPUX_SOURCE"</span></samp>
    485  1.1    mrg can be used to bootstrap the GCC 3.3 branch with the HP compiler in
    486  1.7    mrg 64-bit K&amp;R/bundled mode.  The <samp><span class="option">+DA2.0W</span></samp> option will result in
    487  1.7    mrg the automatic selection of the &lsquo;<samp><span class="samp">hppa64-hp-hpux11*</span></samp>&rsquo; target.  The
    488  1.1    mrg macro definition table of cpp needs to be increased for a successful
    489  1.1    mrg build with the HP compiler.  _CLASSIC_TYPES and _HPUX_SOURCE need to
    490  1.1    mrg be defined when building with the bundled compiler, or when using the
    491  1.7    mrg <samp><span class="option">-Ac</span></samp> option.  These defines aren't necessary with <samp><span class="option">-Ae</span></samp>.
    492  1.7    mrg 
    493  1.7    mrg    <p>It is best to explicitly configure the &lsquo;<samp><span class="samp">hppa64-hp-hpux11*</span></samp>&rsquo; target
    494  1.7    mrg with the <samp><span class="option">--with-ld=...</span></samp> option.  This overrides the standard
    495  1.1    mrg search for ld.  The two linkers supported on this target require different
    496  1.1    mrg commands.  The default linker is determined during configuration.  As a
    497  1.7    mrg result, it's not possible to switch linkers in the middle of a GCC build. 
    498  1.1    mrg This has been reported to sometimes occur in unified builds of binutils
    499  1.1    mrg and GCC.
    500  1.7    mrg 
    501  1.7    mrg    <p>A recent linker patch must be installed for the correct operation of
    502  1.1    mrg GCC 3.3 and later.  <code>PHSS_26559</code> and <code>PHSS_24304</code> are the
    503  1.1    mrg oldest linker patches that are known to work.  They are for HP-UX
    504  1.1    mrg 11.00 and 11.11, respectively.  <code>PHSS_24303</code>, the companion to
    505  1.7    mrg <code>PHSS_24304</code>, might be usable but it hasn't been tested.  These
    506  1.1    mrg patches have been superseded.  Consult the HP patch database to obtain
    507  1.1    mrg the currently recommended linker patch for your system.
    508  1.7    mrg 
    509  1.7    mrg    <p>The patches are necessary for the support of weak symbols on the
    510  1.1    mrg 32-bit port, and for the running of initializers and finalizers.  Weak
    511  1.1    mrg symbols are implemented using SOM secondary definition symbols.  Prior
    512  1.7    mrg to HP-UX 11, there are bugs in the linker support for secondary symbols. 
    513  1.1    mrg The patches correct a problem of linker core dumps creating shared
    514  1.1    mrg libraries containing secondary symbols, as well as various other
    515  1.1    mrg linking issues involving secondary symbols.
    516  1.7    mrg 
    517  1.7    mrg    <p>GCC 3.3 uses the ELF DT_INIT_ARRAY and DT_FINI_ARRAY capabilities to
    518  1.1    mrg run initializers and finalizers on the 64-bit port.  The 32-bit port
    519  1.7    mrg uses the linker <samp><span class="option">+init</span></samp> and <samp><span class="option">+fini</span></samp> options for the same
    520  1.1    mrg purpose.  The patches correct various problems with the +init/+fini
    521  1.1    mrg options, including program core dumps.  Binutils 2.14 corrects a
    522  1.7    mrg problem on the 64-bit port resulting from HP's non-standard use of
    523  1.1    mrg the .init and .fini sections for array initializers and finalizers.
    524  1.7    mrg 
    525  1.7    mrg    <p>Although the HP and GNU linkers are both supported for the
    526  1.7    mrg &lsquo;<samp><span class="samp">hppa64-hp-hpux11*</span></samp>&rsquo; target, it is strongly recommended that the
    527  1.1    mrg HP linker be used for link editing on this target.
    528  1.7    mrg 
    529  1.7    mrg    <p>At this time, the GNU linker does not support the creation of long
    530  1.7    mrg branch stubs.  As a result, it can't successfully link binaries
    531  1.1    mrg containing branch offsets larger than 8 megabytes.  In addition,
    532  1.1    mrg there are problems linking shared libraries, linking executables
    533  1.7    mrg with <samp><span class="option">-static</span></samp>, and with dwarf2 unwind and exception support. 
    534  1.7    mrg It also doesn't provide stubs for internal calls to global functions
    535  1.7    mrg in shared libraries, so these calls can't be overloaded.
    536  1.7    mrg 
    537  1.7    mrg    <p>The HP dynamic loader does not support GNU symbol versioning, so symbol
    538  1.1    mrg versioning is not supported.  It may be necessary to disable symbol
    539  1.7    mrg versioning with <samp><span class="option">--disable-symvers</span></samp> when using GNU ld.
    540  1.7    mrg 
    541  1.7    mrg    <p>POSIX threads are the default.  The optional DCE thread library is not
    542  1.7    mrg supported, so <samp><span class="option">--enable-threads=dce</span></samp> does not work.
    543  1.7    mrg 
    544  1.7    mrg    <p><hr /><a name="x_002dx_002dlinux_002dgnu"></a>
    545  1.7    mrg 
    546  1.7    mrg <h3 class="heading"><a name="TOC19"></a>*-*-linux-gnu</h3>
    547  1.7    mrg 
    548  1.1    mrg <p>Versions of libstdc++-v3 starting with 3.2.1 require bug fixes present
    549  1.1    mrg in glibc 2.2.5 and later.  More information is available in the
    550  1.1    mrg libstdc++-v3 documentation.
    551  1.7    mrg 
    552  1.7    mrg    <p><hr /><a name="ix86_002dx_002dlinux"></a>
    553  1.7    mrg 
    554  1.7    mrg <h3 class="heading"><a name="TOC20"></a>i?86-*-linux*</h3>
    555  1.7    mrg 
    556  1.7    mrg <p>As of GCC 3.3, binutils 2.13.1 or later is required for this platform. 
    557  1.1    mrg See <a href="http://gcc.gnu.org/PR10877">bug 10877</a> for more information.
    558  1.7    mrg 
    559  1.7    mrg    <p>If you receive Signal 11 errors when building on GNU/Linux, then it is
    560  1.1    mrg possible you have a hardware problem.  Further information on this can be
    561  1.1    mrg found on <a href="http://www.bitwizard.nl/sig11/">www.bitwizard.nl</a>.
    562  1.7    mrg 
    563  1.7    mrg    <p><hr /><a name="ix86_002dx_002dsolaris210"></a>
    564  1.7    mrg 
    565  1.7    mrg <h3 class="heading"><a name="TOC21"></a>i?86-*-solaris2.10</h3>
    566  1.7    mrg 
    567  1.3  skrll <p>Use this for Solaris 10 or later on x86 and x86-64 systems.  Starting
    568  1.7    mrg with GCC 4.7, there is also a 64-bit &lsquo;<samp><span class="samp">amd64-*-solaris2.1[0-9]*</span></samp>&rsquo; or
    569  1.7    mrg &lsquo;<samp><span class="samp">x86_64-*-solaris2.1[0-9]*</span></samp>&rsquo; configuration that corresponds to
    570  1.7    mrg &lsquo;<samp><span class="samp">sparcv9-sun-solaris2*</span></samp>&rsquo;.
    571  1.7    mrg 
    572  1.7    mrg    <p>It is recommended that you configure GCC to use the GNU assembler.  The
    573  1.7    mrg versions included in Solaris 10, from GNU binutils 2.15 (in
    574  1.7    mrg <samp><span class="file">/usr/sfw/bin/gas</span></samp>), and Solaris 11, from GNU binutils 2.19 or
    575  1.7    mrg newer (also available as <samp><span class="file">/usr/bin/gas</span></samp> and
    576  1.7    mrg <samp><span class="file">/usr/gnu/bin/as</span></samp>), work fine.  Please note that the current
    577  1.7    mrg version, from GNU binutils 2.26, only works on Solaris 12 when using the
    578  1.7    mrg Solaris linker.  On Solaris 10 and 11, you either have to wait for GNU
    579  1.7    mrg binutils 2.26.1 or newer, or stay with GNU binutils 2.25.1.  Recent
    580  1.7    mrg versions of the Solaris assembler in <samp><span class="file">/usr/ccs/bin/as</span></samp> work almost
    581  1.7    mrg as well, though. 
    582  1.7    mrg <!-- FIXME: as patch requirements? -->
    583  1.7    mrg 
    584  1.7    mrg    <p>For linking, the Solaris linker, is preferred.  If you want to use the GNU
    585  1.7    mrg linker instead, note that due to a packaging bug the version in Solaris
    586  1.7    mrg 10, from GNU binutils 2.15 (in <samp><span class="file">/usr/sfw/bin/gld</span></samp>), cannot be used,
    587  1.7    mrg while the version in Solaris 11, from GNU binutils 2.19 or newer (also
    588  1.7    mrg in <samp><span class="file">/usr/gnu/bin/ld</span></samp> and <samp><span class="file">/usr/bin/gld</span></samp>), works, as does the
    589  1.7    mrg latest version, from GNU binutils 2.26.
    590  1.7    mrg 
    591  1.7    mrg    <p>To use GNU <samp><span class="command">as</span></samp>, configure with the options
    592  1.7    mrg <samp><span class="option">--with-gnu-as --with-as=/usr/sfw/bin/gas</span></samp>.  It may be necessary
    593  1.7    mrg to configure with <samp><span class="option">--without-gnu-ld --with-ld=/usr/ccs/bin/ld</span></samp> to
    594  1.7    mrg guarantee use of Sun <samp><span class="command">ld</span></samp>. 
    595  1.7    mrg <!-- FIXME: why -without-gnu-ld -with-ld? -->
    596  1.7    mrg 
    597  1.7    mrg    <p><hr /><a name="ia64_002dx_002dlinux"></a>
    598  1.7    mrg 
    599  1.7    mrg <h3 class="heading"><a name="TOC22"></a>ia64-*-linux</h3>
    600  1.7    mrg 
    601  1.1    mrg <p>IA-64 processor (also known as IPF, or Itanium Processor Family)
    602  1.1    mrg running GNU/Linux.
    603  1.7    mrg 
    604  1.7    mrg    <p>If you are using the installed system libunwind library with
    605  1.7    mrg <samp><span class="option">--with-system-libunwind</span></samp>, then you must use libunwind 0.98 or
    606  1.1    mrg later.
    607  1.7    mrg 
    608  1.7    mrg    <p>None of the following versions of GCC has an ABI that is compatible
    609  1.1    mrg with any of the other versions in this list, with the exception that
    610  1.1    mrg Red Hat 2.96 and Trillian 000171 are compatible with each other:
    611  1.7    mrg 3.1, 3.0.2, 3.0.1, 3.0, Red Hat 2.96, and Trillian 000717. 
    612  1.7    mrg This primarily affects C++ programs and programs that create shared libraries. 
    613  1.7    mrg GCC 3.1 or later is recommended for compiling linux, the kernel. 
    614  1.1    mrg As of version 3.1 GCC is believed to be fully ABI compliant, and hence no
    615  1.1    mrg more major ABI changes are expected.
    616  1.7    mrg 
    617  1.7    mrg    <p><hr /><a name="ia64_002dx_002dhpux"></a>
    618  1.7    mrg 
    619  1.7    mrg <h3 class="heading"><a name="TOC23"></a>ia64-*-hpux*</h3>
    620  1.7    mrg 
    621  1.1    mrg <p>Building GCC on this target requires the GNU Assembler.  The bundled HP
    622  1.1    mrg assembler will not work.  To prevent GCC from using the wrong assembler,
    623  1.7    mrg the option <samp><span class="option">--with-gnu-as</span></samp> may be necessary.
    624  1.7    mrg 
    625  1.7    mrg    <p>The GCC libunwind library has not been ported to HPUX.  This means that for
    626  1.7    mrg GCC versions 3.2.3 and earlier, <samp><span class="option">--enable-libunwind-exceptions</span></samp>
    627  1.7    mrg is required to build GCC.  For GCC 3.3 and later, this is the default. 
    628  1.7    mrg For gcc 3.4.3 and later, <samp><span class="option">--enable-libunwind-exceptions</span></samp> is
    629  1.1    mrg removed and the system libunwind library will always be used.
    630  1.7    mrg 
    631  1.7    mrg    <p><hr />
    632  1.7    mrg <!-- rs6000-ibm-aix*, powerpc-ibm-aix* --><a name="x_002dibm_002daix"></a>
    633  1.7    mrg 
    634  1.7    mrg <h3 class="heading"><a name="TOC24"></a>*-ibm-aix*</h3>
    635  1.7    mrg 
    636  1.7    mrg <p>Support for AIX version 3 and older was discontinued in GCC 3.4. 
    637  1.1    mrg Support for AIX version 4.2 and older was discontinued in GCC 4.5.
    638  1.7    mrg 
    639  1.7    mrg    <p>&ldquo;out of memory&rdquo; bootstrap failures may indicate a problem with
    640  1.1    mrg process resource limits (ulimit).  Hard limits are configured in the
    641  1.7    mrg <samp><span class="file">/etc/security/limits</span></samp> system configuration file.
    642  1.7    mrg 
    643  1.7    mrg    <p>GCC 4.9 and above require a C++ compiler for bootstrap.  IBM VAC++ / xlC
    644  1.7    mrg cannot bootstrap GCC.  xlc can bootstrap an older version of GCC and
    645  1.7    mrg G++ can bootstrap recent releases of GCC.
    646  1.7    mrg 
    647  1.7    mrg    <p>GCC can bootstrap with recent versions of IBM XLC, but bootstrapping
    648  1.1    mrg with an earlier release of GCC is recommended.  Bootstrapping with XLC
    649  1.1    mrg requires a larger data segment, which can be enabled through the
    650  1.1    mrg <var>LDR_CNTRL</var> environment variable, e.g.,
    651  1.1    mrg 
    652  1.7    mrg <pre class="smallexample">     % LDR_CNTRL=MAXDATA=0x50000000
    653  1.7    mrg      % export LDR_CNTRL
    654  1.7    mrg </pre>
    655  1.7    mrg    <p>One can start with a pre-compiled version of GCC to build from
    656  1.7    mrg sources.  One may delete GCC's &ldquo;fixed&rdquo; header files when starting
    657  1.1    mrg with a version of GCC built for an earlier release of AIX.
    658  1.1    mrg 
    659  1.7    mrg    <p>To speed up the configuration phases of bootstrapping and installing GCC,
    660  1.7    mrg one may use GNU Bash instead of AIX <samp><span class="command">/bin/sh</span></samp>, e.g.,
    661  1.7    mrg 
    662  1.7    mrg <pre class="smallexample">     % CONFIG_SHELL=/opt/freeware/bin/bash
    663  1.7    mrg      % export CONFIG_SHELL
    664  1.7    mrg </pre>
    665  1.7    mrg    <p>and then proceed as described in <a href="build.html">the build instructions</a>, where we strongly recommend specifying an absolute path
    666  1.1    mrg to invoke <var>srcdir</var>/configure.
    667  1.7    mrg 
    668  1.7    mrg    <p>Because GCC on AIX is built as a 32-bit executable by default,
    669  1.1    mrg (although it can generate 64-bit programs) the GMP and MPFR libraries
    670  1.1    mrg required by gfortran must be 32-bit libraries.  Building GMP and MPFR
    671  1.1    mrg as static archive libraries works better than shared libraries.
    672  1.7    mrg 
    673  1.7    mrg    <p>Errors involving <code>alloca</code> when building GCC generally are due
    674  1.1    mrg to an incorrect definition of <code>CC</code> in the Makefile or mixing files
    675  1.1    mrg compiled with the native C compiler and GCC.  During the stage1 phase of
    676  1.7    mrg the build, the native AIX compiler <strong>must</strong> be invoked as <samp><span class="command">cc</span></samp>
    677  1.7    mrg (not <samp><span class="command">xlc</span></samp>).  Once <samp><span class="command">configure</span></samp> has been informed of
    678  1.7    mrg <samp><span class="command">xlc</span></samp>, one needs to use &lsquo;<samp><span class="samp">make distclean</span></samp>&rsquo; to remove the
    679  1.7    mrg configure cache files and ensure that <samp><span class="env">CC</span></samp> environment variable
    680  1.7    mrg does not provide a definition that will confuse <samp><span class="command">configure</span></samp>. 
    681  1.1    mrg If this error occurs during stage2 or later, then the problem most likely
    682  1.1    mrg is the version of Make (see above).
    683  1.7    mrg 
    684  1.7    mrg    <p>The native <samp><span class="command">as</span></samp> and <samp><span class="command">ld</span></samp> are recommended for
    685  1.3  skrll bootstrapping on AIX.  The GNU Assembler, GNU Linker, and GNU
    686  1.3  skrll Binutils version 2.20 is the minimum level that supports bootstrap on
    687  1.7    mrg AIX 5.  The GNU Assembler has not been updated to support AIX 6 or
    688  1.3  skrll AIX 7.  The native AIX tools do interoperate with GCC.
    689  1.7    mrg 
    690  1.7    mrg    <p>AIX 7.1 added partial support for DWARF debugging, but full support
    691  1.7    mrg requires AIX 7.1 TL03 SP7 that supports additional DWARF sections and
    692  1.7    mrg fixes a bug in the assembler.  AIX 7.1 TL03 SP5 distributed a version
    693  1.7    mrg of libm.a missing important symbols; a fix for IV77796 will be
    694  1.7    mrg included in SP6.
    695  1.7    mrg 
    696  1.7    mrg    <p>AIX 5.3 TL10, AIX 6.1 TL05 and AIX 7.1 TL00 introduced an AIX
    697  1.3  skrll assembler change that sometimes produces corrupt assembly files
    698  1.3  skrll causing AIX linker errors.  The bug breaks GCC bootstrap on AIX and
    699  1.3  skrll can cause compilation failures with existing GCC installations.  An
    700  1.3  skrll AIX iFix for AIX 5.3 is available (APAR IZ98385 for AIX 5.3 TL10, APAR
    701  1.3  skrll IZ98477 for AIX 5.3 TL11 and IZ98134 for AIX 5.3 TL12). AIX 5.3 TL11 SP8,
    702  1.3  skrll AIX 5.3 TL12 SP5, AIX 6.1 TL04 SP11, AIX 6.1 TL05 SP7, AIX 6.1 TL06 SP6,
    703  1.3  skrll AIX 6.1 TL07 and AIX 7.1 TL01 should include the fix.
    704  1.7    mrg 
    705  1.7    mrg    <p>Building <samp><span class="file">libstdc++.a</span></samp> requires a fix for an AIX Assembler bug
    706  1.1    mrg APAR IY26685 (AIX 4.3) or APAR IY25528 (AIX 5.1).  It also requires a
    707  1.1    mrg fix for another AIX Assembler bug and a co-dependent AIX Archiver fix
    708  1.1    mrg referenced as APAR IY53606 (AIX 5.2) or as APAR IY54774 (AIX 5.1)
    709  1.7    mrg 
    710  1.7    mrg    <p><a name="TransferAixShobj"></a>&lsquo;<samp><span class="samp">libstdc++</span></samp>&rsquo; in GCC 3.4 increments the major version number of the
    711  1.7    mrg shared object and GCC installation places the <samp><span class="file">libstdc++.a</span></samp>
    712  1.1    mrg shared library in a common location which will overwrite the and GCC
    713  1.1    mrg 3.3 version of the shared library.  Applications either need to be
    714  1.1    mrg re-linked against the new shared library or the GCC 3.1 and GCC 3.3
    715  1.7    mrg versions of the &lsquo;<samp><span class="samp">libstdc++</span></samp>&rsquo; shared object needs to be available
    716  1.7    mrg to the AIX runtime loader.  The GCC 3.1 &lsquo;<samp><span class="samp">libstdc++.so.4</span></samp>&rsquo;, if
    717  1.7    mrg present, and GCC 3.3 &lsquo;<samp><span class="samp">libstdc++.so.5</span></samp>&rsquo; shared objects can be
    718  1.1    mrg installed for runtime dynamic loading using the following steps to set
    719  1.7    mrg the &lsquo;<samp><span class="samp">F_LOADONLY</span></samp>&rsquo; flag in the shared object for <em>each</em>
    720  1.7    mrg multilib <samp><span class="file">libstdc++.a</span></samp> installed:
    721  1.1    mrg 
    722  1.7    mrg    <p>Extract the shared objects from the currently installed
    723  1.7    mrg <samp><span class="file">libstdc++.a</span></samp> archive:
    724  1.7    mrg <pre class="smallexample">     % ar -x libstdc++.a libstdc++.so.4 libstdc++.so.5
    725  1.7    mrg </pre>
    726  1.7    mrg    <p>Enable the &lsquo;<samp><span class="samp">F_LOADONLY</span></samp>&rsquo; flag so that the shared object will be
    727  1.1    mrg available for runtime dynamic loading, but not linking:
    728  1.7    mrg <pre class="smallexample">     % strip -e libstdc++.so.4 libstdc++.so.5
    729  1.7    mrg </pre>
    730  1.7    mrg    <p>Archive the runtime-only shared object in the GCC 3.4
    731  1.7    mrg <samp><span class="file">libstdc++.a</span></samp> archive:
    732  1.7    mrg <pre class="smallexample">     % ar -q libstdc++.a libstdc++.so.4 libstdc++.so.5
    733  1.7    mrg </pre>
    734  1.7    mrg    <p>Eventually, the
    735  1.7    mrg <a href="./configure.html#WithAixSoname"><samp><span class="option">--with-aix-soname=svr4</span></samp></a>
    736  1.5    mrg configure option may drop the need for this procedure for libraries that
    737  1.5    mrg support it.
    738  1.7    mrg 
    739  1.7    mrg    <p>Linking executables and shared libraries may produce warnings of
    740  1.1    mrg duplicate symbols.  The assembly files generated by GCC for AIX always
    741  1.1    mrg have included multiple symbol definitions for certain global variable
    742  1.1    mrg and function declarations in the original program.  The warnings should
    743  1.1    mrg not prevent the linker from producing a correct library or runnable
    744  1.1    mrg executable.
    745  1.7    mrg 
    746  1.7    mrg    <p>AIX 4.3 utilizes a &ldquo;large format&rdquo; archive to support both 32-bit and
    747  1.1    mrg 64-bit object modules.  The routines provided in AIX 4.3.0 and AIX 4.3.1
    748  1.7    mrg to parse archive libraries did not handle the new format correctly. 
    749  1.1    mrg These routines are used by GCC and result in error messages during
    750  1.1    mrg linking such as &ldquo;not a COFF file&rdquo;.  The version of the routines shipped
    751  1.7    mrg with AIX 4.3.1 should work for a 32-bit environment.  The <samp><span class="option">-g</span></samp>
    752  1.1    mrg option of the archive command may be used to create archives of 32-bit
    753  1.1    mrg objects using the original &ldquo;small format&rdquo;.  A correct version of the
    754  1.1    mrg routines is shipped with AIX 4.3.2 and above.
    755  1.7    mrg 
    756  1.7    mrg    <p>Some versions of the AIX binder (linker) can fail with a relocation
    757  1.7    mrg overflow severe error when the <samp><span class="option">-bbigtoc</span></samp> option is used to link
    758  1.1    mrg GCC-produced object files into an executable that overflows the TOC.  A fix
    759  1.1    mrg for APAR IX75823 (OVERFLOW DURING LINK WHEN USING GCC AND -BBIGTOC) is
    760  1.1    mrg available from IBM Customer Support and from its
    761  1.1    mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
    762  1.1    mrg website as PTF U455193.
    763  1.7    mrg 
    764  1.7    mrg    <p>The AIX 4.3.2.1 linker (bos.rte.bind_cmds Level 4.3.2.1) will dump core
    765  1.1    mrg with a segmentation fault when invoked by any version of GCC.  A fix for
    766  1.1    mrg APAR IX87327 is available from IBM Customer Support and from its
    767  1.1    mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
    768  1.1    mrg website as PTF U461879.  This fix is incorporated in AIX 4.3.3 and above.
    769  1.7    mrg 
    770  1.7    mrg    <p>The initial assembler shipped with AIX 4.3.0 generates incorrect object
    771  1.1    mrg files.  A fix for APAR IX74254 (64BIT DISASSEMBLED OUTPUT FROM COMPILER FAILS
    772  1.1    mrg TO ASSEMBLE/BIND) is available from IBM Customer Support and from its
    773  1.1    mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
    774  1.1    mrg website as PTF U453956.  This fix is incorporated in AIX 4.3.1 and above.
    775  1.7    mrg 
    776  1.7    mrg    <p>AIX provides National Language Support (NLS).  Compilers and assemblers
    777  1.1    mrg use NLS to support locale-specific representations of various data
    778  1.7    mrg formats including floating-point numbers (e.g., &lsquo;<samp><span class="samp">.</span></samp>&rsquo;  vs &lsquo;<samp><span class="samp">,</span></samp>&rsquo; for
    779  1.1    mrg separating decimal fractions).  There have been problems reported where
    780  1.1    mrg GCC does not produce the same floating-point formats that the assembler
    781  1.7    mrg expects.  If one encounters this problem, set the <samp><span class="env">LANG</span></samp>
    782  1.7    mrg environment variable to &lsquo;<samp><span class="samp">C</span></samp>&rsquo; or &lsquo;<samp><span class="samp">En_US</span></samp>&rsquo;.
    783  1.7    mrg 
    784  1.7    mrg    <p>A default can be specified with the <samp><span class="option">-mcpu=</span><var>cpu_type</var></samp>
    785  1.7    mrg switch and using the configure option <samp><span class="option">--with-cpu-</span><var>cpu_type</var></samp>.
    786  1.7    mrg 
    787  1.7    mrg    <p><hr /><a name="iq2000_002dx_002delf"></a>
    788  1.7    mrg 
    789  1.7    mrg <h3 class="heading"><a name="TOC25"></a>iq2000-*-elf</h3>
    790  1.7    mrg 
    791  1.1    mrg <p>Vitesse IQ2000 processors.  These are used in embedded
    792  1.1    mrg applications.  There are no standard Unix configurations.
    793  1.7    mrg 
    794  1.7    mrg    <p><hr /><a name="lm32_002dx_002delf"></a>
    795  1.7    mrg 
    796  1.7    mrg <h3 class="heading"><a name="TOC26"></a>lm32-*-elf</h3>
    797  1.7    mrg 
    798  1.7    mrg <p>Lattice Mico32 processor. 
    799  1.1    mrg This configuration is intended for embedded systems.
    800  1.7    mrg 
    801  1.7    mrg    <p><hr /><a name="lm32_002dx_002duclinux"></a>
    802  1.7    mrg 
    803  1.7    mrg <h3 class="heading"><a name="TOC27"></a>lm32-*-uclinux</h3>
    804  1.7    mrg 
    805  1.7    mrg <p>Lattice Mico32 processor. 
    806  1.1    mrg This configuration is intended for embedded systems running uClinux.
    807  1.7    mrg 
    808  1.7    mrg    <p><hr /><a name="m32c_002dx_002delf"></a>
    809  1.7    mrg 
    810  1.7    mrg <h3 class="heading"><a name="TOC28"></a>m32c-*-elf</h3>
    811  1.7    mrg 
    812  1.7    mrg <p>Renesas M32C processor. 
    813  1.1    mrg This configuration is intended for embedded systems.
    814  1.7    mrg 
    815  1.7    mrg    <p><hr /><a name="m32r_002dx_002delf"></a>
    816  1.7    mrg 
    817  1.7    mrg <h3 class="heading"><a name="TOC29"></a>m32r-*-elf</h3>
    818  1.7    mrg 
    819  1.7    mrg <p>Renesas M32R processor. 
    820  1.1    mrg This configuration is intended for embedded systems.
    821  1.7    mrg 
    822  1.7    mrg    <p><hr /><a name="m68k_002dx_002dx"></a>
    823  1.7    mrg 
    824  1.7    mrg <h3 class="heading"><a name="TOC30"></a>m68k-*-*</h3>
    825  1.7    mrg 
    826  1.1    mrg <p>By default,
    827  1.7    mrg &lsquo;<samp><span class="samp">m68k-*-elf*</span></samp>&rsquo;, &lsquo;<samp><span class="samp">m68k-*-rtems</span></samp>&rsquo;,  &lsquo;<samp><span class="samp">m68k-*-uclinux</span></samp>&rsquo; and
    828  1.7    mrg &lsquo;<samp><span class="samp">m68k-*-linux</span></samp>&rsquo;
    829  1.1    mrg build libraries for both M680x0 and ColdFire processors.  If you only
    830  1.1    mrg need the M680x0 libraries, you can omit the ColdFire ones by passing
    831  1.7    mrg <samp><span class="option">--with-arch=m68k</span></samp> to <samp><span class="command">configure</span></samp>.  Alternatively, you
    832  1.7    mrg can omit the M680x0 libraries by passing <samp><span class="option">--with-arch=cf</span></samp> to
    833  1.7    mrg <samp><span class="command">configure</span></samp>.  These targets default to 5206 or 5475 code as
    834  1.1    mrg appropriate for the target system when
    835  1.7    mrg configured with <samp><span class="option">--with-arch=cf</span></samp> and 68020 code otherwise.
    836  1.7    mrg 
    837  1.7    mrg    <p>The &lsquo;<samp><span class="samp">m68k-*-netbsd</span></samp>&rsquo; and
    838  1.7    mrg &lsquo;<samp><span class="samp">m68k-*-openbsd</span></samp>&rsquo; targets also support the <samp><span class="option">--with-arch</span></samp>
    839  1.1    mrg option.  They will generate ColdFire CFV4e code when configured with
    840  1.7    mrg <samp><span class="option">--with-arch=cf</span></samp> and 68020 code otherwise.
    841  1.7    mrg 
    842  1.7    mrg    <p>You can override the default processors listed above by configuring
    843  1.7    mrg with <samp><span class="option">--with-cpu=</span><var>target</var></samp>.  This <var>target</var> can either
    844  1.7    mrg be a <samp><span class="option">-mcpu</span></samp> argument or one of the following values:
    845  1.7    mrg &lsquo;<samp><span class="samp">m68000</span></samp>&rsquo;, &lsquo;<samp><span class="samp">m68010</span></samp>&rsquo;, &lsquo;<samp><span class="samp">m68020</span></samp>&rsquo;, &lsquo;<samp><span class="samp">m68030</span></samp>&rsquo;,
    846  1.7    mrg &lsquo;<samp><span class="samp">m68040</span></samp>&rsquo;, &lsquo;<samp><span class="samp">m68060</span></samp>&rsquo;, &lsquo;<samp><span class="samp">m68020-40</span></samp>&rsquo; and &lsquo;<samp><span class="samp">m68020-60</span></samp>&rsquo;.
    847  1.7    mrg 
    848  1.7    mrg    <p>GCC requires at least binutils version 2.17 on these targets.
    849  1.7    mrg 
    850  1.7    mrg    <p><hr /><a name="m68k_002dx_002duclinux"></a>
    851  1.7    mrg 
    852  1.7    mrg <h3 class="heading"><a name="TOC31"></a>m68k-*-uclinux</h3>
    853  1.7    mrg 
    854  1.1    mrg <p>GCC 4.3 changed the uClinux configuration so that it uses the
    855  1.7    mrg &lsquo;<samp><span class="samp">m68k-linux-gnu</span></samp>&rsquo; ABI rather than the &lsquo;<samp><span class="samp">m68k-elf</span></samp>&rsquo; ABI. 
    856  1.1    mrg It also added improved support for C++ and flat shared libraries,
    857  1.3  skrll both of which were ABI changes.
    858  1.7    mrg 
    859  1.7    mrg    <p><hr /><a name="mep_002dx_002delf"></a>
    860  1.7    mrg 
    861  1.7    mrg <h3 class="heading"><a name="TOC32"></a>mep-*-elf</h3>
    862  1.7    mrg 
    863  1.7    mrg <p>Toshiba Media embedded Processor. 
    864  1.1    mrg This configuration is intended for embedded systems.
    865  1.7    mrg 
    866  1.7    mrg    <p><hr /><a name="microblaze_002dx_002delf"></a>
    867  1.7    mrg 
    868  1.7    mrg <h3 class="heading"><a name="TOC33"></a>microblaze-*-elf</h3>
    869  1.7    mrg 
    870  1.7    mrg <p>Xilinx MicroBlaze processor. 
    871  1.3  skrll This configuration is intended for embedded systems.
    872  1.7    mrg 
    873  1.7    mrg    <p><hr /><a name="mips_002dx_002dx"></a>
    874  1.7    mrg 
    875  1.7    mrg <h3 class="heading"><a name="TOC34"></a>mips-*-*</h3>
    876  1.7    mrg 
    877  1.1    mrg <p>If on a MIPS system you get an error message saying &ldquo;does not have gp
    878  1.7    mrg sections for all it's [sic] sectons [sic]&rdquo;, don't worry about it.  This
    879  1.1    mrg happens whenever you use GAS with the MIPS linker, but there is not
    880  1.1    mrg really anything wrong, and it is okay to use the output file.  You can
    881  1.1    mrg stop such warnings by installing the GNU linker.
    882  1.7    mrg 
    883  1.7    mrg    <p>It would be nice to extend GAS to produce the gp tables, but they are
    884  1.1    mrg optional, and there should not be a warning about their absence.
    885  1.7    mrg 
    886  1.7    mrg    <p>The libstdc++ atomic locking routines for MIPS targets requires MIPS II
    887  1.1    mrg and later.  A patch went in just after the GCC 3.3 release to
    888  1.7    mrg make &lsquo;<samp><span class="samp">mips*-*-*</span></samp>&rsquo; use the generic implementation instead.  You can also
    889  1.7    mrg configure for &lsquo;<samp><span class="samp">mipsel-elf</span></samp>&rsquo; as a workaround.  The
    890  1.7    mrg &lsquo;<samp><span class="samp">mips*-*-linux*</span></samp>&rsquo; target continues to use the MIPS II routines.  More
    891  1.1    mrg work on this is expected in future releases.
    892  1.1    mrg 
    893  1.7    mrg <!-- If you make -with-llsc the default for another target, please also -->
    894  1.7    mrg <!-- update the description of the -with-llsc option. -->
    895  1.7    mrg    <p>The built-in <code>__sync_*</code> functions are available on MIPS II and
    896  1.7    mrg later systems and others that support the &lsquo;<samp><span class="samp">ll</span></samp>&rsquo;, &lsquo;<samp><span class="samp">sc</span></samp>&rsquo; and
    897  1.7    mrg &lsquo;<samp><span class="samp">sync</span></samp>&rsquo; instructions.  This can be overridden by passing
    898  1.7    mrg <samp><span class="option">--with-llsc</span></samp> or <samp><span class="option">--without-llsc</span></samp> when configuring GCC. 
    899  1.1    mrg Since the Linux kernel emulates these instructions if they are
    900  1.7    mrg missing, the default for &lsquo;<samp><span class="samp">mips*-*-linux*</span></samp>&rsquo; targets is
    901  1.7    mrg <samp><span class="option">--with-llsc</span></samp>.  The <samp><span class="option">--with-llsc</span></samp> and
    902  1.7    mrg <samp><span class="option">--without-llsc</span></samp> configure options may be overridden at compile
    903  1.7    mrg time by passing the <samp><span class="option">-mllsc</span></samp> or <samp><span class="option">-mno-llsc</span></samp> options to
    904  1.1    mrg the compiler.
    905  1.7    mrg 
    906  1.7    mrg    <p>MIPS systems check for division by zero (unless
    907  1.7    mrg <samp><span class="option">-mno-check-zero-division</span></samp> is passed to the compiler) by
    908  1.1    mrg generating either a conditional trap or a break instruction.  Using
    909  1.1    mrg trap results in smaller code, but is only supported on MIPS II and
    910  1.1    mrg later.  Also, some versions of the Linux kernel have a bug that
    911  1.1    mrg prevents trap from generating the proper signal (<code>SIGFPE</code>).  To enable
    912  1.7    mrg the use of break, use the <samp><span class="option">--with-divide=breaks</span></samp>
    913  1.7    mrg <samp><span class="command">configure</span></samp> option when configuring GCC.  The default is to
    914  1.1    mrg use traps on systems that support them.
    915  1.7    mrg 
    916  1.7    mrg    <p>The assembler from GNU binutils 2.17 and earlier has a bug in the way
    917  1.1    mrg it sorts relocations for REL targets (o32, o64, EABI).  This can cause
    918  1.1    mrg bad code to be generated for simple C++ programs.  Also the linker
    919  1.1    mrg from GNU binutils versions prior to 2.17 has a bug which causes the
    920  1.7    mrg runtime linker stubs in very large programs, like <samp><span class="file">libgcj.so</span></samp>, to
    921  1.1    mrg be incorrectly generated.  GNU Binutils 2.18 and later (and snapshots
    922  1.1    mrg made after Nov. 9, 2006) should be free from both of these problems.
    923  1.7    mrg 
    924  1.7    mrg    <p><hr /><a name="mips_002dsgi_002dirix5"></a>
    925  1.7    mrg 
    926  1.7    mrg <h3 class="heading"><a name="TOC35"></a>mips-sgi-irix5</h3>
    927  1.7    mrg 
    928  1.3  skrll <p>Support for IRIX 5 has been removed in GCC 4.6.
    929  1.7    mrg 
    930  1.7    mrg    <p><hr /><a name="mips_002dsgi_002dirix6"></a>
    931  1.7    mrg 
    932  1.7    mrg <h3 class="heading"><a name="TOC36"></a>mips-sgi-irix6</h3>
    933  1.7    mrg 
    934  1.3  skrll <p>Support for IRIX 6.5 has been removed in GCC 4.8.  Support for IRIX 6
    935  1.3  skrll releases before 6.5 has been removed in GCC 4.6, as well as support for
    936  1.3  skrll the O32 ABI.
    937  1.7    mrg 
    938  1.7    mrg    <p><hr /><a name="moxie_002dx_002delf"></a>
    939  1.7    mrg 
    940  1.7    mrg <h3 class="heading"><a name="TOC37"></a>moxie-*-elf</h3>
    941  1.7    mrg 
    942  1.3  skrll <p>The moxie processor.
    943  1.7    mrg 
    944  1.7    mrg    <p><hr /><a name="msp430_002dx_002delf"></a>
    945  1.7    mrg 
    946  1.7    mrg <h3 class="heading"><a name="TOC38"></a>msp430-*-elf</h3>
    947  1.7    mrg 
    948  1.7    mrg <p>TI MSP430 processor. 
    949  1.5    mrg This configuration is intended for embedded systems.
    950  1.7    mrg 
    951  1.7    mrg    <p><hr /><a name="nds32le_002dx_002delf"></a>
    952  1.7    mrg 
    953  1.7    mrg <h3 class="heading"><a name="TOC39"></a>nds32le-*-elf</h3>
    954  1.7    mrg 
    955  1.5    mrg <p>Andes NDS32 target in little endian mode.
    956  1.7    mrg 
    957  1.7    mrg    <p><hr /><a name="nds32be_002dx_002delf"></a>
    958  1.7    mrg 
    959  1.7    mrg <h3 class="heading"><a name="TOC40"></a>nds32be-*-elf</h3>
    960  1.7    mrg 
    961  1.5    mrg <p>Andes NDS32 target in big endian mode.
    962  1.7    mrg 
    963  1.7    mrg    <p><hr /><a name="nvptx_002dx_002dnone"></a>
    964  1.7    mrg 
    965  1.7    mrg <h3 class="heading"><a name="TOC41"></a>nvptx-*-none</h3>
    966  1.7    mrg 
    967  1.5    mrg <p>Nvidia PTX target.
    968  1.7    mrg 
    969  1.7    mrg    <p>Instead of GNU binutils, you will need to install
    970  1.7    mrg <a href="https://github.com/MentorEmbedded/nvptx-tools/">nvptx-tools</a>. 
    971  1.5    mrg Tell GCC where to find it:
    972  1.7    mrg <samp><span class="option">--with-build-time-tools=[install-nvptx-tools]/nvptx-none/bin</span></samp>.
    973  1.7    mrg 
    974  1.7    mrg    <p>A nvptx port of newlib is available at
    975  1.7    mrg <a href="https://github.com/MentorEmbedded/nvptx-newlib/">nvptx-newlib</a>. 
    976  1.5    mrg It can be automatically built together with GCC.  For this, add a
    977  1.7    mrg symbolic link to nvptx-newlib's <samp><span class="file">newlib</span></samp> directory to the
    978  1.5    mrg directory containing the GCC sources.
    979  1.7    mrg 
    980  1.7    mrg    <p>Use the <samp><span class="option">--disable-sjlj-exceptions</span></samp> and
    981  1.7    mrg <samp><span class="option">--enable-newlib-io-long-long</span></samp> options when configuring.
    982  1.7    mrg 
    983  1.7    mrg    <p><hr /><a name="powerpc_002dx_002dx"></a>
    984  1.7    mrg 
    985  1.7    mrg <h3 class="heading"><a name="TOC42"></a>powerpc-*-*</h3>
    986  1.7    mrg 
    987  1.7    mrg <p>You can specify a default version for the <samp><span class="option">-mcpu=</span><var>cpu_type</var></samp>
    988  1.7    mrg switch by using the configure option <samp><span class="option">--with-cpu-</span><var>cpu_type</var></samp>.
    989  1.7    mrg 
    990  1.7    mrg    <p>You will need
    991  1.1    mrg <a href="ftp://ftp.kernel.org/pub/linux/devel/binutils">binutils 2.15</a>
    992  1.1    mrg or newer for a working GCC.
    993  1.7    mrg 
    994  1.7    mrg    <p><hr /><a name="powerpc_002dx_002ddarwin"></a>
    995  1.7    mrg 
    996  1.7    mrg <h3 class="heading"><a name="TOC43"></a>powerpc-*-darwin*</h3>
    997  1.7    mrg 
    998  1.1    mrg <p>PowerPC running Darwin (Mac OS X kernel).
    999  1.7    mrg 
   1000  1.7    mrg    <p>Pre-installed versions of Mac OS X may not include any developer tools,
   1001  1.1    mrg meaning that you will not be able to build GCC from source.  Tool
   1002  1.1    mrg binaries are available at
   1003  1.3  skrll <a href="http://opensource.apple.com/">http://opensource.apple.com/</a>.
   1004  1.7    mrg 
   1005  1.7    mrg    <p>This version of GCC requires at least cctools-590.36.  The
   1006  1.1    mrg cctools-590.36 package referenced from
   1007  1.1    mrg <a href="http://gcc.gnu.org/ml/gcc/2006-03/msg00507.html">http://gcc.gnu.org/ml/gcc/2006-03/msg00507.html</a> will not work
   1008  1.1    mrg on systems older than 10.3.9 (aka darwin7.9.0).
   1009  1.7    mrg 
   1010  1.7    mrg    <p><hr /><a name="powerpc_002dx_002delf"></a>
   1011  1.7    mrg 
   1012  1.7    mrg <h3 class="heading"><a name="TOC44"></a>powerpc-*-elf</h3>
   1013  1.7    mrg 
   1014  1.1    mrg <p>PowerPC system in big endian mode, running System V.4.
   1015  1.7    mrg 
   1016  1.7    mrg    <p><hr /><a name="powerpc_002dx_002dlinux_002dgnu"></a>
   1017  1.7    mrg 
   1018  1.7    mrg <h3 class="heading"><a name="TOC45"></a>powerpc*-*-linux-gnu*</h3>
   1019  1.7    mrg 
   1020  1.1    mrg <p>PowerPC system in big endian mode running Linux.
   1021  1.7    mrg 
   1022  1.7    mrg    <p><hr /><a name="powerpc_002dx_002dnetbsd"></a>
   1023  1.7    mrg 
   1024  1.7    mrg <h3 class="heading"><a name="TOC46"></a>powerpc-*-netbsd*</h3>
   1025  1.7    mrg 
   1026  1.1    mrg <p>PowerPC system in big endian mode running NetBSD.
   1027  1.7    mrg 
   1028  1.7    mrg    <p><hr /><a name="powerpc_002dx_002deabisim"></a>
   1029  1.7    mrg 
   1030  1.7    mrg <h3 class="heading"><a name="TOC47"></a>powerpc-*-eabisim</h3>
   1031  1.7    mrg 
   1032  1.1    mrg <p>Embedded PowerPC system in big endian mode for use in running under the
   1033  1.1    mrg PSIM simulator.
   1034  1.7    mrg 
   1035  1.7    mrg    <p><hr /><a name="powerpc_002dx_002deabi"></a>
   1036  1.7    mrg 
   1037  1.7    mrg <h3 class="heading"><a name="TOC48"></a>powerpc-*-eabi</h3>
   1038  1.7    mrg 
   1039  1.1    mrg <p>Embedded PowerPC system in big endian mode.
   1040  1.7    mrg 
   1041  1.7    mrg    <p><hr /><a name="powerpcle_002dx_002delf"></a>
   1042  1.7    mrg 
   1043  1.7    mrg <h3 class="heading"><a name="TOC49"></a>powerpcle-*-elf</h3>
   1044  1.7    mrg 
   1045  1.1    mrg <p>PowerPC system in little endian mode, running System V.4.
   1046  1.7    mrg 
   1047  1.7    mrg    <p><hr /><a name="powerpcle_002dx_002deabisim"></a>
   1048  1.7    mrg 
   1049  1.7    mrg <h3 class="heading"><a name="TOC50"></a>powerpcle-*-eabisim</h3>
   1050  1.7    mrg 
   1051  1.1    mrg <p>Embedded PowerPC system in little endian mode for use in running under
   1052  1.1    mrg the PSIM simulator.
   1053  1.7    mrg 
   1054  1.7    mrg    <p><hr /><a name="powerpcle_002dx_002deabi"></a>
   1055  1.7    mrg 
   1056  1.7    mrg <h3 class="heading"><a name="TOC51"></a>powerpcle-*-eabi</h3>
   1057  1.7    mrg 
   1058  1.1    mrg <p>Embedded PowerPC system in little endian mode.
   1059  1.7    mrg 
   1060  1.7    mrg    <p><hr /><a name="rl78_002dx_002delf"></a>
   1061  1.7    mrg 
   1062  1.7    mrg <h3 class="heading"><a name="TOC52"></a>rl78-*-elf</h3>
   1063  1.7    mrg 
   1064  1.7    mrg <p>The Renesas RL78 processor. 
   1065  1.3  skrll This configuration is intended for embedded systems.
   1066  1.7    mrg 
   1067  1.7    mrg    <p><hr /><a name="rx_002dx_002delf"></a>
   1068  1.7    mrg 
   1069  1.7    mrg <h3 class="heading"><a name="TOC53"></a>rx-*-elf</h3>
   1070  1.7    mrg 
   1071  1.1    mrg <p>The Renesas RX processor.  See
   1072  1.1    mrg <a href="http://eu.renesas.com/fmwk.jsp?cnt=rx600_series_landing.jsp&fp=/products/mpumcu/rx_family/rx600_series">http://eu.renesas.com/fmwk.jsp?cnt=rx600_series_landing.jsp&fp=/products/mpumcu/rx_family/rx600_series</a>
   1073  1.1    mrg for more information about this processor.
   1074  1.7    mrg 
   1075  1.7    mrg    <p><hr /><a name="s390_002dx_002dlinux"></a>
   1076  1.7    mrg 
   1077  1.7    mrg <h3 class="heading"><a name="TOC54"></a>s390-*-linux*</h3>
   1078  1.7    mrg 
   1079  1.1    mrg <p>S/390 system running GNU/Linux for S/390.
   1080  1.7    mrg 
   1081  1.7    mrg    <p><hr /><a name="s390x_002dx_002dlinux"></a>
   1082  1.7    mrg 
   1083  1.7    mrg <h3 class="heading"><a name="TOC55"></a>s390x-*-linux*</h3>
   1084  1.7    mrg 
   1085  1.1    mrg <p>zSeries system (64-bit) running GNU/Linux for zSeries.
   1086  1.7    mrg 
   1087  1.7    mrg    <p><hr /><a name="s390x_002dibm_002dtpf"></a>
   1088  1.7    mrg 
   1089  1.7    mrg <h3 class="heading"><a name="TOC56"></a>s390x-ibm-tpf*</h3>
   1090  1.7    mrg 
   1091  1.1    mrg <p>zSeries system (64-bit) running TPF.  This platform is
   1092  1.1    mrg supported as cross-compilation target only.
   1093  1.7    mrg 
   1094  1.7    mrg    <p><hr /><!-- Please use Solaris 2 to refer to all release of Solaris, starting -->
   1095  1.7    mrg <!-- with 2.0 until 2.6, 7, 8, etc.  Solaris 1 was a marketing name for -->
   1096  1.7    mrg <!-- SunOS 4 releases which we don't use to avoid confusion.  Solaris -->
   1097  1.7    mrg <!-- alone is too unspecific and must be avoided. -->
   1098  1.7    mrg <a name="x_002dx_002dsolaris2"></a>
   1099  1.7    mrg 
   1100  1.7    mrg <h3 class="heading"><a name="TOC57"></a>*-*-solaris2*</h3>
   1101  1.7    mrg 
   1102  1.6    mrg <p>Support for Solaris 9 has been removed in GCC 5.  Support for Solaris
   1103  1.5    mrg 8 has been removed in GCC 4.8.  Support for Solaris 7 has been removed
   1104  1.5    mrg in GCC 4.6.
   1105  1.7    mrg 
   1106  1.7    mrg    <p>Sun does not ship a C compiler with Solaris 2 before Solaris 10, though
   1107  1.3  skrll you can download the Sun Studio compilers for free.  In Solaris 10 and
   1108  1.7    mrg 11, GCC 3.4.3 is available as <samp><span class="command">/usr/sfw/bin/gcc</span></samp>.  Solaris 11
   1109  1.7    mrg also provides GCC 4.5.2, 4.7.3, and 4.8.2 as
   1110  1.7    mrg <samp><span class="command">/usr/gcc/4.5/bin/gcc</span></samp> or similar.  Alternatively,
   1111  1.1    mrg you can install a pre-built GCC to bootstrap and install GCC.  See the
   1112  1.1    mrg <a href="binaries.html">binaries page</a> for details.
   1113  1.7    mrg 
   1114  1.7    mrg    <p>The Solaris 2 <samp><span class="command">/bin/sh</span></samp> will often fail to configure
   1115  1.7    mrg &lsquo;<samp><span class="samp">libstdc++-v3</span></samp>&rsquo;, &lsquo;<samp><span class="samp">boehm-gc</span></samp>&rsquo; or &lsquo;<samp><span class="samp">libjava</span></samp>&rsquo;.  We therefore
   1116  1.1    mrg recommend using the following initial sequence of commands
   1117  1.1    mrg 
   1118  1.7    mrg <pre class="smallexample">     % CONFIG_SHELL=/bin/ksh
   1119  1.7    mrg      % export CONFIG_SHELL
   1120  1.7    mrg </pre>
   1121  1.7    mrg    <p class="noindent">and proceed as described in <a href="configure.html">the configure instructions</a>. 
   1122  1.1    mrg In addition we strongly recommend specifying an absolute path to invoke
   1123  1.7    mrg <samp><var>srcdir</var><span class="command">/configure</span></samp>.
   1124  1.7    mrg 
   1125  1.7    mrg    <p>Solaris 10 comes with a number of optional OS packages.  Some of these
   1126  1.1    mrg are needed to use GCC fully, namely <code>SUNWarc</code>,
   1127  1.1    mrg <code>SUNWbtool</code>, <code>SUNWesu</code>, <code>SUNWhea</code>, <code>SUNWlibm</code>,
   1128  1.1    mrg <code>SUNWsprot</code>, and <code>SUNWtoo</code>.  If you did not install all
   1129  1.7    mrg optional packages when installing Solaris 10, you will need to verify that
   1130  1.7    mrg the packages that GCC needs are installed. 
   1131  1.7    mrg To check whether an optional package is installed, use
   1132  1.7    mrg the <samp><span class="command">pkginfo</span></samp> command.  To add an optional package, use the
   1133  1.7    mrg <samp><span class="command">pkgadd</span></samp> command.  For further details, see the Solaris 10
   1134  1.1    mrg documentation.
   1135  1.7    mrg 
   1136  1.7    mrg    <p>Starting with Solaris 11, the package management has changed, so you
   1137  1.7    mrg need to check for <code>system/header</code>, <code>system/linker</code>, and
   1138  1.7    mrg <code>developer/assembler</code> packages.  Checking for and installing
   1139  1.7    mrg packages is done with the <samp><span class="command">pkg</span></samp> command now.
   1140  1.7    mrg 
   1141  1.7    mrg    <p>Trying to use the linker and other tools in
   1142  1.7    mrg <samp><span class="file">/usr/ucb</span></samp> to install GCC has been observed to cause trouble. 
   1143  1.1    mrg For example, the linker may hang indefinitely.  The fix is to remove
   1144  1.7    mrg <samp><span class="file">/usr/ucb</span></samp> from your <samp><span class="env">PATH</span></samp>.
   1145  1.7    mrg 
   1146  1.7    mrg    <p>The build process works more smoothly with the legacy Sun tools so, if you
   1147  1.7    mrg have <samp><span class="file">/usr/xpg4/bin</span></samp> in your <samp><span class="env">PATH</span></samp>, we recommend that you place
   1148  1.7    mrg <samp><span class="file">/usr/bin</span></samp> before <samp><span class="file">/usr/xpg4/bin</span></samp> for the duration of the build.
   1149  1.7    mrg 
   1150  1.7    mrg    <p>We recommend the use of the Solaris assembler or the GNU assembler, in
   1151  1.7    mrg conjunction with the Solaris linker.  The GNU <samp><span class="command">as</span></samp>
   1152  1.7    mrg versions included in Solaris 10, from GNU binutils 2.15 (in
   1153  1.7    mrg <samp><span class="file">/usr/sfw/bin/gas</span></samp>), and Solaris 11,
   1154  1.7    mrg from GNU binutils 2.19 or newer (also in <samp><span class="file">/usr/bin/gas</span></samp> and
   1155  1.7    mrg <samp><span class="file">/usr/gnu/bin/as</span></samp>), are known to work. 
   1156  1.7    mrg Current versions of GNU binutils (2.26)
   1157  1.7    mrg are known to work as well, with the caveat mentioned in
   1158  1.7    mrg <a href="#ix86-x-solaris210">i?86-*-solaris2.10</a> .  Note that your mileage may vary
   1159  1.7    mrg if you use a combination of the GNU tools and the Solaris tools: while the
   1160  1.7    mrg combination GNU <samp><span class="command">as</span></samp> + Sun <samp><span class="command">ld</span></samp> should reasonably work,
   1161  1.7    mrg the reverse combination Sun <samp><span class="command">as</span></samp> + GNU <samp><span class="command">ld</span></samp> may fail to
   1162  1.7    mrg build or cause memory corruption at runtime in some cases for C++ programs. 
   1163  1.7    mrg <!-- FIXME: still? -->
   1164  1.7    mrg GNU <samp><span class="command">ld</span></samp> usually works as well, although the version included in
   1165  1.1    mrg Solaris 10 cannot be used due to several bugs.  Again, the current
   1166  1.7    mrg version (2.26) is known to work, but generally lacks platform specific
   1167  1.7    mrg features, so better stay with Solaris <samp><span class="command">ld</span></samp>.  To use the LTO linker
   1168  1.7    mrg plugin (<samp><span class="option">-fuse-linker-plugin</span></samp>) with GNU <samp><span class="command">ld</span></samp>, GNU
   1169  1.7    mrg binutils <em>must</em> be configured with <samp><span class="option">--enable-largefile</span></samp>.
   1170  1.7    mrg 
   1171  1.7    mrg    <p>To enable symbol versioning in &lsquo;<samp><span class="samp">libstdc++</span></samp>&rsquo; with the Solaris linker,
   1172  1.7    mrg you need to have any version of GNU <samp><span class="command">c++filt</span></samp>, which is part of
   1173  1.7    mrg GNU binutils.  &lsquo;<samp><span class="samp">libstdc++</span></samp>&rsquo; symbol versioning will be disabled if no
   1174  1.7    mrg appropriate version is found.  Solaris <samp><span class="command">c++filt</span></samp> from the Solaris
   1175  1.7    mrg Studio compilers does <em>not</em> work.
   1176  1.7    mrg 
   1177  1.7    mrg    <p>GNU <samp><span class="command">make</span></samp> version 3.81 or later is required to build libjava
   1178  1.7    mrg with the Solaris linker.
   1179  1.7    mrg 
   1180  1.7    mrg    <p>Sun bug 4927647 sometimes causes random spurious testsuite failures
   1181  1.7    mrg related to missing diagnostic output.  This bug doesn't affect GCC
   1182  1.7    mrg itself, rather it is a kernel bug triggered by the <samp><span class="command">expect</span></samp>
   1183  1.1    mrg program which is used only by the GCC testsuite driver.  When the bug
   1184  1.7    mrg causes the <samp><span class="command">expect</span></samp> program to miss anticipated output, extra
   1185  1.1    mrg testsuite failures appear.
   1186  1.7    mrg 
   1187  1.7    mrg    <p><hr /><a name="sparc_002dx_002dx"></a>
   1188  1.7    mrg 
   1189  1.7    mrg <h3 class="heading"><a name="TOC58"></a>sparc*-*-*</h3>
   1190  1.7    mrg 
   1191  1.3  skrll <p>This section contains general configuration information for all
   1192  1.3  skrll SPARC-based platforms.  In addition to reading this section, please
   1193  1.3  skrll read all other sections that match your target.
   1194  1.7    mrg 
   1195  1.7    mrg    <p>Newer versions of the GNU Multiple Precision Library (GMP), the MPFR
   1196  1.3  skrll library and the MPC library are known to be miscompiled by earlier
   1197  1.3  skrll versions of GCC on these platforms.  We therefore recommend the use
   1198  1.3  skrll of the exact versions of these libraries listed as minimal versions
   1199  1.3  skrll in <a href="prerequisites.html">the prerequisites</a>.
   1200  1.7    mrg 
   1201  1.7    mrg    <p><hr /><a name="sparc_002dsun_002dsolaris2"></a>
   1202  1.7    mrg 
   1203  1.7    mrg <h3 class="heading"><a name="TOC59"></a>sparc-sun-solaris2*</h3>
   1204  1.7    mrg 
   1205  1.1    mrg <p>When GCC is configured to use GNU binutils 2.14 or later, the binaries
   1206  1.7    mrg produced are smaller than the ones produced using Sun's native tools;
   1207  1.1    mrg this difference is quite significant for binaries containing debugging
   1208  1.1    mrg information.
   1209  1.7    mrg 
   1210  1.7    mrg    <p>Starting with Solaris 7, the operating system is capable of executing
   1211  1.1    mrg 64-bit SPARC V9 binaries.  GCC 3.1 and later properly supports
   1212  1.7    mrg this; the <samp><span class="option">-m64</span></samp> option enables 64-bit code generation. 
   1213  1.1    mrg However, if all you want is code tuned for the UltraSPARC CPU, you
   1214  1.7    mrg should try the <samp><span class="option">-mtune=ultrasparc</span></samp> option instead, which produces
   1215  1.1    mrg code that, unlike full 64-bit code, can still run on non-UltraSPARC
   1216  1.1    mrg machines.
   1217  1.7    mrg 
   1218  1.7    mrg    <p>When configuring the GNU Multiple Precision Library (GMP), the MPFR
   1219  1.3  skrll library or the MPC library on a Solaris 7 or later system, the canonical
   1220  1.7    mrg target triplet must be specified as the <samp><span class="command">build</span></samp> parameter on the
   1221  1.7    mrg configure line.  This target triplet can be obtained by invoking <samp><span class="command">./config.guess</span></samp> in the toplevel source directory of GCC (and
   1222  1.3  skrll not that of GMP or MPFR or MPC).  For example on a Solaris 9 system:
   1223  1.7    mrg 
   1224  1.7    mrg <pre class="smallexample">     % ./configure --build=sparc-sun-solaris2.9 --prefix=xxx
   1225  1.7    mrg </pre>
   1226  1.7    mrg    <p><hr /><a name="sparc_002dsun_002dsolaris210"></a>
   1227  1.7    mrg 
   1228  1.7    mrg <h3 class="heading"><a name="TOC60"></a>sparc-sun-solaris2.10</h3>
   1229  1.7    mrg 
   1230  1.1    mrg <p>There is a bug in older versions of the Sun assembler which breaks
   1231  1.1    mrg thread-local storage (TLS).  A typical error message is
   1232  1.7    mrg 
   1233  1.7    mrg <pre class="smallexample">     ld: fatal: relocation error: R_SPARC_TLS_LE_HIX22: file /var/tmp//ccamPA1v.o:
   1234  1.7    mrg        symbol &lt;unknown&gt;: bad symbol type SECT: symbol type must be TLS
   1235  1.7    mrg </pre>
   1236  1.7    mrg    <p class="noindent">This bug is fixed in Sun patch 118683-03 or later.
   1237  1.7    mrg 
   1238  1.7    mrg    <p><hr /><a name="sparc_002dx_002dlinux"></a>
   1239  1.7    mrg 
   1240  1.7    mrg <h3 class="heading"><a name="TOC61"></a>sparc-*-linux*</h3>
   1241  1.1    mrg 
   1242  1.1    mrg <p>GCC versions 3.0 and higher require binutils 2.11.2 and glibc 2.2.4
   1243  1.1    mrg or newer on this platform.  All earlier binutils and glibc
   1244  1.1    mrg releases mishandled unaligned relocations on <code>sparc-*-*</code> targets.
   1245  1.1    mrg 
   1246  1.7    mrg    <p><hr /><a name="sparc64_002dx_002dsolaris2"></a>
   1247  1.7    mrg 
   1248  1.7    mrg <h3 class="heading"><a name="TOC62"></a>sparc64-*-solaris2*</h3>
   1249  1.7    mrg 
   1250  1.3  skrll <p>When configuring the GNU Multiple Precision Library (GMP), the MPFR
   1251  1.3  skrll library or the MPC library, the canonical target triplet must be specified
   1252  1.7    mrg as the <samp><span class="command">build</span></samp> parameter on the configure line.  For example
   1253  1.3  skrll on a Solaris 9 system:
   1254  1.7    mrg 
   1255  1.7    mrg <pre class="smallexample">     % ./configure --build=sparc64-sun-solaris2.9 --prefix=xxx
   1256  1.7    mrg </pre>
   1257  1.7    mrg    <p><hr /><a name="sparcv9_002dx_002dsolaris2"></a>
   1258  1.7    mrg 
   1259  1.7    mrg <h3 class="heading"><a name="TOC63"></a>sparcv9-*-solaris2*</h3>
   1260  1.7    mrg 
   1261  1.7    mrg <p>This is a synonym for &lsquo;<samp><span class="samp">sparc64-*-solaris2*</span></samp>&rsquo;.
   1262  1.7    mrg 
   1263  1.7    mrg    <p><hr /><a name="c6x_002dx_002dx"></a>
   1264  1.7    mrg 
   1265  1.7    mrg <h3 class="heading"><a name="TOC64"></a>c6x-*-*</h3>
   1266  1.7    mrg 
   1267  1.3  skrll <p>The C6X family of processors. This port requires binutils-2.22 or newer.
   1268  1.7    mrg 
   1269  1.7    mrg    <p><hr /><a name="tilegx_002d_002a_002dlinux"></a>
   1270  1.7    mrg 
   1271  1.7    mrg <h3 class="heading"><a name="TOC65"></a>tilegx-*-linux*</h3>
   1272  1.7    mrg 
   1273  1.5    mrg <p>The TILE-Gx processor in little endian mode, running GNU/Linux.  This
   1274  1.5    mrg port requires binutils-2.22 or newer.
   1275  1.7    mrg 
   1276  1.7    mrg    <p><hr /><a name="tilegxbe_002d_002a_002dlinux"></a>
   1277  1.7    mrg 
   1278  1.7    mrg <h3 class="heading"><a name="TOC66"></a>tilegxbe-*-linux*</h3>
   1279  1.7    mrg 
   1280  1.5    mrg <p>The TILE-Gx processor in big endian mode, running GNU/Linux.  This
   1281  1.5    mrg port requires binutils-2.23 or newer.
   1282  1.7    mrg 
   1283  1.7    mrg    <p><hr /><a name="tilepro_002d_002a_002dlinux"></a>
   1284  1.7    mrg 
   1285  1.7    mrg <h3 class="heading"><a name="TOC67"></a>tilepro-*-linux*</h3>
   1286  1.7    mrg 
   1287  1.3  skrll <p>The TILEPro processor running GNU/Linux.  This port requires
   1288  1.3  skrll binutils-2.22 or newer.
   1289  1.7    mrg 
   1290  1.7    mrg    <p><hr /><a name="visium_002dx_002delf"></a>
   1291  1.7    mrg 
   1292  1.7    mrg <h3 class="heading"><a name="TOC68"></a>visium-*-elf</h3>
   1293  1.7    mrg 
   1294  1.7    mrg <p>CDS VISIUMcore processor. 
   1295  1.5    mrg This configuration is intended for embedded systems.
   1296  1.7    mrg 
   1297  1.7    mrg    <p><hr /><a name="x_002dx_002dvxworks"></a>
   1298  1.7    mrg 
   1299  1.7    mrg <h3 class="heading"><a name="TOC69"></a>*-*-vxworks*</h3>
   1300  1.7    mrg 
   1301  1.1    mrg <p>Support for VxWorks is in flux.  At present GCC supports <em>only</em> the
   1302  1.7    mrg very recent VxWorks 5.5 (aka Tornado 2.2) release, and only on PowerPC. 
   1303  1.7    mrg We welcome patches for other architectures supported by VxWorks 5.5. 
   1304  1.1    mrg Support for VxWorks AE would also be welcome; we believe this is merely
   1305  1.1    mrg a matter of writing an appropriate &ldquo;configlette&rdquo; (see below).  We are
   1306  1.1    mrg not interested in supporting older, a.out or COFF-based, versions of
   1307  1.1    mrg VxWorks in GCC 3.
   1308  1.7    mrg 
   1309  1.7    mrg    <p>VxWorks comes with an older version of GCC installed in
   1310  1.7    mrg <samp><var>$WIND_BASE</var><span class="file">/host</span></samp>; we recommend you do not overwrite it. 
   1311  1.7    mrg Choose an installation <var>prefix</var> entirely outside <var>$WIND_BASE</var>. 
   1312  1.7    mrg Before running <samp><span class="command">configure</span></samp>, create the directories <samp><var>prefix</var></samp>
   1313  1.7    mrg and <samp><var>prefix</var><span class="file">/bin</span></samp>.  Link or copy the appropriate assembler,
   1314  1.7    mrg linker, etc. into <samp><var>prefix</var><span class="file">/bin</span></samp>, and set your <var>PATH</var> to
   1315  1.7    mrg include that directory while running both <samp><span class="command">configure</span></samp> and
   1316  1.7    mrg <samp><span class="command">make</span></samp>.
   1317  1.7    mrg 
   1318  1.7    mrg    <p>You must give <samp><span class="command">configure</span></samp> the
   1319  1.7    mrg <samp><span class="option">--with-headers=</span><var>$WIND_BASE</var><span class="option">/target/h</span></samp> switch so that it can
   1320  1.1    mrg find the VxWorks system headers.  Since VxWorks is a cross compilation
   1321  1.7    mrg target only, you must also specify <samp><span class="option">--target=</span><var>target</var></samp>. 
   1322  1.7    mrg <samp><span class="command">configure</span></samp> will attempt to create the directory
   1323  1.7    mrg <samp><var>prefix</var><span class="file">/</span><var>target</var><span class="file">/sys-include</span></samp> and copy files into it;
   1324  1.7    mrg make sure the user running <samp><span class="command">configure</span></samp> has sufficient privilege
   1325  1.1    mrg to do so.
   1326  1.7    mrg 
   1327  1.7    mrg    <p>GCC's exception handling runtime requires a special &ldquo;configlette&rdquo;
   1328  1.7    mrg module, <samp><span class="file">contrib/gthr_supp_vxw_5x.c</span></samp>.  Follow the instructions in
   1329  1.1    mrg that file to add the module to your kernel build.  (Future versions of
   1330  1.1    mrg VxWorks will incorporate this module.)
   1331  1.7    mrg 
   1332  1.7    mrg    <p><hr /><a name="x86_002d64_002dx_002dx"></a>
   1333  1.7    mrg 
   1334  1.7    mrg <h3 class="heading"><a name="TOC70"></a>x86_64-*-*, amd64-*-*</h3>
   1335  1.7    mrg 
   1336  1.1    mrg <p>GCC supports the x86-64 architecture implemented by the AMD64 processor
   1337  1.7    mrg (amd64-*-* is an alias for x86_64-*-*) on GNU/Linux, FreeBSD and NetBSD. 
   1338  1.1    mrg On GNU/Linux the default is a bi-arch compiler which is able to generate
   1339  1.7    mrg both 64-bit x86-64 and 32-bit x86 code (via the <samp><span class="option">-m32</span></samp> switch).
   1340  1.7    mrg 
   1341  1.7    mrg    <p><hr /><a name="x86_002d64_002dx_002dsolaris210"></a>
   1342  1.7    mrg 
   1343  1.7    mrg <h3 class="heading"><a name="TOC71"></a>x86_64-*-solaris2.1[0-9]*</h3>
   1344  1.7    mrg 
   1345  1.3  skrll <p>GCC also supports the x86-64 architecture implemented by the AMD64
   1346  1.7    mrg processor (&lsquo;<samp><span class="samp">amd64-*-*</span></samp>&rsquo; is an alias for &lsquo;<samp><span class="samp">x86_64-*-*</span></samp>&rsquo;) on
   1347  1.3  skrll Solaris 10 or later.  Unlike other systems, without special options a
   1348  1.3  skrll bi-arch compiler is built which generates 32-bit code by default, but
   1349  1.7    mrg can generate 64-bit x86-64 code with the <samp><span class="option">-m64</span></samp> switch.  Since
   1350  1.7    mrg GCC 4.7, there is also a configuration that defaults to 64-bit code, but
   1351  1.7    mrg can generate 32-bit code with <samp><span class="option">-m32</span></samp>.  To configure and build
   1352  1.7    mrg this way, you have to provide all support libraries like <samp><span class="file">libgmp</span></samp>
   1353  1.7    mrg as 64-bit code, configure with <samp><span class="option">--target=x86_64-pc-solaris2.1x</span></samp>
   1354  1.7    mrg and &lsquo;<samp><span class="samp">CC=gcc -m64</span></samp>&rsquo;.
   1355  1.7    mrg 
   1356  1.7    mrg    <p><hr /><a name="xtensa_002dx_002delf"></a>
   1357  1.7    mrg 
   1358  1.7    mrg <h3 class="heading"><a name="TOC72"></a>xtensa*-*-elf</h3>
   1359  1.7    mrg 
   1360  1.1    mrg <p>This target is intended for embedded Xtensa systems using the
   1361  1.7    mrg &lsquo;<samp><span class="samp">newlib</span></samp>&rsquo; C library.  It uses ELF but does not support shared
   1362  1.1    mrg objects.  Designed-defined instructions specified via the
   1363  1.1    mrg Tensilica Instruction Extension (TIE) language are only supported
   1364  1.1    mrg through inline assembly.
   1365  1.7    mrg 
   1366  1.7    mrg    <p>The Xtensa configuration information must be specified prior to
   1367  1.7    mrg building GCC.  The <samp><span class="file">include/xtensa-config.h</span></samp> header
   1368  1.1    mrg file contains the configuration information.  If you created your
   1369  1.1    mrg own Xtensa configuration with the Xtensa Processor Generator, the
   1370  1.1    mrg downloaded files include a customized copy of this header file,
   1371  1.1    mrg which you can use to replace the default header file.
   1372  1.7    mrg 
   1373  1.7    mrg    <p><hr /><a name="xtensa_002dx_002dlinux"></a>
   1374  1.7    mrg 
   1375  1.7    mrg <h3 class="heading"><a name="TOC73"></a>xtensa*-*-linux*</h3>
   1376  1.7    mrg 
   1377  1.1    mrg <p>This target is for Xtensa systems running GNU/Linux.  It supports ELF
   1378  1.1    mrg shared objects and the GNU C library (glibc).  It also generates
   1379  1.1    mrg position-independent code (PIC) regardless of whether the
   1380  1.7    mrg <samp><span class="option">-fpic</span></samp> or <samp><span class="option">-fPIC</span></samp> options are used.  In other
   1381  1.1    mrg respects, this target is the same as the
   1382  1.7    mrg <a href="#xtensa*-*-elf">&lsquo;<samp><span class="samp">xtensa*-*-elf</span></samp>&rsquo;</a> target.
   1383  1.7    mrg 
   1384  1.7    mrg    <p><hr /><a name="windows"></a>
   1385  1.7    mrg 
   1386  1.7    mrg <h3 class="heading"><a name="TOC74"></a>Microsoft Windows</h3>
   1387  1.7    mrg 
   1388  1.7    mrg <h4 class="subheading"><a name="TOC75"></a>Intel 16-bit versions</h4>
   1389  1.1    mrg 
   1390  1.1    mrg <p>The 16-bit versions of Microsoft Windows, such as Windows 3.1, are not
   1391  1.1    mrg supported.
   1392  1.7    mrg 
   1393  1.7    mrg    <p>However, the 32-bit port has limited support for Microsoft
   1394  1.1    mrg Windows 3.11 in the Win32s environment, as a target only.  See below.
   1395  1.7    mrg 
   1396  1.7    mrg <h4 class="subheading"><a name="TOC76"></a>Intel 32-bit versions</h4>
   1397  1.7    mrg 
   1398  1.1    mrg <p>The 32-bit versions of Windows, including Windows 95, Windows NT, Windows
   1399  1.1    mrg XP, and Windows Vista, are supported by several different target
   1400  1.1    mrg platforms.  These targets differ in which Windows subsystem they target
   1401  1.1    mrg and which C libraries are used.
   1402  1.1    mrg 
   1403  1.7    mrg      <ul>
   1404  1.7    mrg <li>Cygwin <a href="#x-x-cygwin">*-*-cygwin</a>: Cygwin provides a user-space
   1405  1.7    mrg Linux API emulation layer in the Win32 subsystem. 
   1406  1.7    mrg <li>Interix <a href="#x-x-interix">*-*-interix</a>: The Interix subsystem
   1407  1.7    mrg provides native support for POSIX. 
   1408  1.7    mrg <li>MinGW <a href="#x-x-mingw32">*-*-mingw32</a>: MinGW is a native GCC port for
   1409  1.7    mrg the Win32 subsystem that provides a subset of POSIX. 
   1410  1.7    mrg <li>MKS i386-pc-mks: NuTCracker from MKS.  See
   1411  1.7    mrg <a href="http://www.mkssoftware.com/">http://www.mkssoftware.com/</a> for more information. 
   1412  1.7    mrg </ul>
   1413  1.7    mrg 
   1414  1.7    mrg <h4 class="subheading"><a name="TOC77"></a>Intel 64-bit versions</h4>
   1415  1.7    mrg 
   1416  1.1    mrg <p>GCC contains support for x86-64 using the mingw-w64
   1417  1.7    mrg runtime library, available from <a href="http://mingw-w64.sourceforge.net/">http://mingw-w64.sourceforge.net/</a>. 
   1418  1.1    mrg This library should be used with the target triple x86_64-pc-mingw32.
   1419  1.7    mrg 
   1420  1.7    mrg    <p>Presently Windows for Itanium is not supported.
   1421  1.7    mrg 
   1422  1.7    mrg <h4 class="subheading"><a name="TOC78"></a>Windows CE</h4>
   1423  1.7    mrg 
   1424  1.3  skrll <p>Windows CE is supported as a target only on Hitachi
   1425  1.1    mrg SuperH (sh-wince-pe), and MIPS (mips-wince-pe).
   1426  1.7    mrg 
   1427  1.7    mrg <h4 class="subheading"><a name="TOC79"></a>Other Windows Platforms</h4>
   1428  1.7    mrg 
   1429  1.1    mrg <p>GCC no longer supports Windows NT on the Alpha or PowerPC.
   1430  1.7    mrg 
   1431  1.7    mrg    <p>GCC no longer supports the Windows POSIX subsystem.  However, it does
   1432  1.1    mrg support the Interix subsystem.  See above.
   1433  1.7    mrg 
   1434  1.7    mrg    <p>Old target names including *-*-winnt and *-*-windowsnt are no longer used.
   1435  1.7    mrg 
   1436  1.7    mrg    <p>PW32 (i386-pc-pw32) support was never completed, and the project seems to
   1437  1.1    mrg be inactive.  See <a href="http://pw32.sourceforge.net/">http://pw32.sourceforge.net/</a> for more information.
   1438  1.7    mrg 
   1439  1.7    mrg    <p>UWIN support has been removed due to a lack of maintenance.
   1440  1.7    mrg 
   1441  1.7    mrg    <p><hr /><a name="x_002dx_002dcygwin"></a>
   1442  1.7    mrg 
   1443  1.7    mrg <h3 class="heading"><a name="TOC80"></a>*-*-cygwin</h3>
   1444  1.7    mrg 
   1445  1.1    mrg <p>Ports of GCC are included with the
   1446  1.1    mrg <a href="http://www.cygwin.com/">Cygwin environment</a>.
   1447  1.7    mrg 
   1448  1.7    mrg    <p>GCC will build under Cygwin without modification; it does not build
   1449  1.7    mrg with Microsoft's C++ compiler and there are no plans to make it do so.
   1450  1.7    mrg 
   1451  1.7    mrg    <p>The Cygwin native compiler can be configured to target any 32-bit x86
   1452  1.1    mrg cpu architecture desired; the default is i686-pc-cygwin.  It should be
   1453  1.1    mrg used with as up-to-date a version of binutils as possible; use either
   1454  1.1    mrg the latest official GNU binutils release in the Cygwin distribution,
   1455  1.1    mrg or version 2.20 or above if building your own.
   1456  1.7    mrg 
   1457  1.7    mrg    <p><hr /><a name="x_002dx_002dinterix"></a>
   1458  1.7    mrg 
   1459  1.7    mrg <h3 class="heading"><a name="TOC81"></a>*-*-interix</h3>
   1460  1.7    mrg 
   1461  1.1    mrg <p>The Interix target is used by OpenNT, Interix, Services For UNIX (SFU),
   1462  1.1    mrg and Subsystem for UNIX-based Applications (SUA).  Applications compiled
   1463  1.1    mrg with this target run in the Interix subsystem, which is separate from
   1464  1.1    mrg the Win32 subsystem.  This target was last known to work in GCC 3.3.
   1465  1.7    mrg 
   1466  1.7    mrg    <p><hr /><a name="x_002dx_002dmingw32"></a>
   1467  1.7    mrg 
   1468  1.7    mrg <h3 class="heading"><a name="TOC82"></a>*-*-mingw32</h3>
   1469  1.7    mrg 
   1470  1.7    mrg <p>GCC will build with and support only MinGW runtime 3.12 and later. 
   1471  1.1    mrg Earlier versions of headers are incompatible with the new default semantics
   1472  1.1    mrg of <code>extern inline</code> in <code>-std=c99</code> and <code>-std=gnu99</code> modes.
   1473  1.7    mrg 
   1474  1.7    mrg    <p><hr /><a name="older"></a>
   1475  1.7    mrg 
   1476  1.7    mrg <h3 class="heading"><a name="TOC83"></a>Older systems</h3>
   1477  1.7    mrg 
   1478  1.1    mrg <p>GCC contains support files for many older (1980s and early
   1479  1.1    mrg 1990s) Unix variants.  For the most part, support for these systems
   1480  1.1    mrg has not been deliberately removed, but it has not been maintained for
   1481  1.1    mrg several years and may suffer from bitrot.
   1482  1.7    mrg 
   1483  1.7    mrg    <p>Starting with GCC 3.1, each release has a list of &ldquo;obsoleted&rdquo; systems. 
   1484  1.1    mrg Support for these systems is still present in that release, but
   1485  1.7    mrg <samp><span class="command">configure</span></samp> will fail unless the <samp><span class="option">--enable-obsolete</span></samp>
   1486  1.1    mrg option is given.  Unless a maintainer steps forward, support for these
   1487  1.1    mrg systems will be removed from the next release of GCC.
   1488  1.7    mrg 
   1489  1.7    mrg    <p>Support for old systems as hosts for GCC can cause problems if the
   1490  1.1    mrg workarounds for compiler, library and operating system bugs affect the
   1491  1.1    mrg cleanliness or maintainability of the rest of GCC.  In some cases, to
   1492  1.1    mrg bring GCC up on such a system, if still possible with current GCC, may
   1493  1.1    mrg require first installing an old version of GCC which did work on that
   1494  1.1    mrg system, and using it to compile a more recent GCC, to avoid bugs in the
   1495  1.1    mrg vendor compiler.  Old releases of GCC 1 and GCC 2 are available in the
   1496  1.7    mrg <samp><span class="file">old-releases</span></samp> directory on the <a href="../mirrors.html">GCC mirror sites</a>.  Header bugs may generally be avoided using
   1497  1.7    mrg <samp><span class="command">fixincludes</span></samp>, but bugs or deficiencies in libraries and the
   1498  1.1    mrg operating system may still cause problems.
   1499  1.7    mrg 
   1500  1.7    mrg    <p>Support for older systems as targets for cross-compilation is less
   1501  1.1    mrg problematic than support for them as hosts for GCC; if an enthusiast
   1502  1.1    mrg wishes to make such a target work again (including resurrecting any of
   1503  1.1    mrg the targets that never worked with GCC 2, starting from the last
   1504  1.1    mrg version before they were removed), patches
   1505  1.1    mrg <a href="../contribute.html">following the usual requirements</a> would be
   1506  1.1    mrg likely to be accepted, since they should not affect the support for more
   1507  1.1    mrg modern targets.
   1508  1.7    mrg 
   1509  1.7    mrg    <p>For some systems, old versions of GNU binutils may also be useful,
   1510  1.7    mrg and are available from <samp><span class="file">pub/binutils/old-releases</span></samp> on
   1511  1.1    mrg <a href="http://sourceware.org/mirrors.html">sourceware.org mirror sites</a>.
   1512  1.7    mrg 
   1513  1.7    mrg    <p>Some of the information on specific systems above relates to
   1514  1.1    mrg such older systems, but much of the information
   1515  1.1    mrg about GCC on such systems (which may no longer be applicable to
   1516  1.1    mrg current GCC) is to be found in the GCC texinfo manual.
   1517  1.7    mrg 
   1518  1.7    mrg    <p><hr /><a name="elf"></a>
   1519  1.7    mrg 
   1520  1.7    mrg <h3 class="heading"><a name="TOC84"></a>all ELF targets (SVR4, Solaris 2, etc.)</h3>
   1521  1.7    mrg 
   1522  1.1    mrg <p>C++ support is significantly better on ELF targets if you use the
   1523  1.1    mrg <a href="./configure.html#with-gnu-ld">GNU linker</a>; duplicate copies of
   1524  1.1    mrg inlines, vtables and template instantiations will be discarded
   1525  1.1    mrg automatically.
   1526  1.1    mrg 
   1527  1.7    mrg    <p><hr />
   1528  1.1    mrg <p><a href="./index.html">Return to the GCC Installation page</a>
   1529  1.1    mrg 
   1530  1.7    mrg <!-- ***Old documentation****************************************************** -->
   1531  1.7    mrg <!-- ***GFDL******************************************************************** -->
   1532  1.7    mrg <!-- *************************************************************************** -->
   1533  1.7    mrg <!-- Part 6 The End of the Document -->
   1534  1.7    mrg </body></html>
   1535  1.1    mrg 
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