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     42  1.1  mrg <h1 class="settitle">Host/Target specific installation notes for GCC</h1>
     43  1.1  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  1.1  mrg Please read this document carefully <em>before</em> installing the
     45  1.1  mrg GNU Compiler Collection on your machine.
     46  1.1  mrg 
     47  1.1  mrg    <p>Note that this list of install notes is <em>not</em> a list of supported
     48  1.1  mrg hosts or targets.  Not all supported hosts and targets are listed
     49  1.1  mrg here, only the ones that require host-specific or target-specific
     50  1.3  mrg information have to.
     51  1.1  mrg 
     52  1.1  mrg      <ul>
     53  1.5  mrg <li><a href="#aarch64-x-x">aarch64*-*-*</a>
     54  1.1  mrg <li><a href="#alpha-x-x">alpha*-*-*</a>
     55  1.3  mrg <li><a href="#alpha-dec-osf51">alpha*-dec-osf5.1</a>
     56  1.3  mrg <li><a href="#amd64-x-solaris210">amd64-*-solaris2.10</a>
     57  1.3  mrg <li><a href="#arm-x-eabi">arm-*-eabi</a>
     58  1.1  mrg <li><a href="#avr">avr</a>
     59  1.1  mrg <li><a href="#bfin">Blackfin</a>
     60  1.1  mrg <li><a href="#dos">DOS</a>
     61  1.1  mrg <li><a href="#x-x-freebsd">*-*-freebsd*</a>
     62  1.1  mrg <li><a href="#h8300-hms">h8300-hms</a>
     63  1.1  mrg <li><a href="#hppa-hp-hpux">hppa*-hp-hpux*</a>
     64  1.1  mrg <li><a href="#hppa-hp-hpux10">hppa*-hp-hpux10</a>
     65  1.1  mrg <li><a href="#hppa-hp-hpux11">hppa*-hp-hpux11</a>
     66  1.1  mrg <li><a href="#x-x-linux-gnu">*-*-linux-gnu</a>
     67  1.1  mrg <li><a href="#ix86-x-linux">i?86-*-linux*</a>
     68  1.1  mrg <li><a href="#ix86-x-solaris210">i?86-*-solaris2.10</a>
     69  1.1  mrg <li><a href="#ia64-x-linux">ia64-*-linux</a>
     70  1.1  mrg <li><a href="#ia64-x-hpux">ia64-*-hpux*</a>
     71  1.1  mrg <li><a href="#x-ibm-aix">*-ibm-aix*</a>
     72  1.1  mrg <li><a href="#iq2000-x-elf">iq2000-*-elf</a>
     73  1.1  mrg <li><a href="#lm32-x-elf">lm32-*-elf</a>
     74  1.1  mrg <li><a href="#lm32-x-uclinux">lm32-*-uclinux</a>
     75  1.1  mrg <li><a href="#m32c-x-elf">m32c-*-elf</a>
     76  1.1  mrg <li><a href="#m32r-x-elf">m32r-*-elf</a>
     77  1.1  mrg <li><a href="#m68k-x-x">m68k-*-*</a>
     78  1.1  mrg <li><a href="#m68k-uclinux">m68k-uclinux</a>
     79  1.1  mrg <li><a href="#mep-x-elf">mep-*-elf</a>
     80  1.3  mrg <li><a href="#microblaze-x-elf">microblaze-*-elf</a>
     81  1.1  mrg <li><a href="#mips-x-x">mips-*-*</a>
     82  1.1  mrg <li><a href="#mips-sgi-irix5">mips-sgi-irix5</a>
     83  1.1  mrg <li><a href="#mips-sgi-irix6">mips-sgi-irix6</a>
     84  1.5  mrg <li><a href="#nds32le-x-elf">nds32le-*-elf</a>
     85  1.5  mrg <li><a href="#nds32be-x-elf">nds32be-*-elf</a>
     86  1.5  mrg <li><a href="#nvptx-x-none">nvptx-*-none</a>
     87  1.1  mrg <li><a href="#powerpc-x-x">powerpc*-*-*</a>
     88  1.1  mrg <li><a href="#powerpc-x-darwin">powerpc-*-darwin*</a>
     89  1.1  mrg <li><a href="#powerpc-x-elf">powerpc-*-elf</a>
     90  1.1  mrg <li><a href="#powerpc-x-linux-gnu">powerpc*-*-linux-gnu*</a>
     91  1.1  mrg <li><a href="#powerpc-x-netbsd">powerpc-*-netbsd*</a>
     92  1.1  mrg <li><a href="#powerpc-x-eabisim">powerpc-*-eabisim</a>
     93  1.1  mrg <li><a href="#powerpc-x-eabi">powerpc-*-eabi</a>
     94  1.1  mrg <li><a href="#powerpcle-x-elf">powerpcle-*-elf</a>
     95  1.1  mrg <li><a href="#powerpcle-x-eabisim">powerpcle-*-eabisim</a>
     96  1.1  mrg <li><a href="#powerpcle-x-eabi">powerpcle-*-eabi</a>
     97  1.1  mrg <li><a href="#s390-x-linux">s390-*-linux*</a>
     98  1.1  mrg <li><a href="#s390x-x-linux">s390x-*-linux*</a>
     99  1.1  mrg <li><a href="#s390x-ibm-tpf">s390x-ibm-tpf*</a>
    100  1.1  mrg <li><a href="#x-x-solaris2">*-*-solaris2*</a>
    101  1.3  mrg <li><a href="#sparc-x-x">sparc*-*-*</a>
    102  1.1  mrg <li><a href="#sparc-sun-solaris2">sparc-sun-solaris2*</a>
    103  1.1  mrg <li><a href="#sparc-sun-solaris210">sparc-sun-solaris2.10</a>
    104  1.1  mrg <li><a href="#sparc-x-linux">sparc-*-linux*</a>
    105  1.1  mrg <li><a href="#sparc64-x-solaris2">sparc64-*-solaris2*</a>
    106  1.1  mrg <li><a href="#sparcv9-x-solaris2">sparcv9-*-solaris2*</a>
    107  1.3  mrg <li><a href="#c6x-x-x">c6x-*-*</a>
    108  1.3  mrg <li><a href="#tilegx-x-linux">tilegx-*-linux*</a>
    109  1.5  mrg <li><a href="#tilegxbe-x-linux">tilegxbe-*-linux*</a>
    110  1.3  mrg <li><a href="#tilepro-x-linux">tilepro-*-linux*</a>
    111  1.5  mrg <li><a href="#visium-x-elf">visium-*-elf</a>
    112  1.1  mrg <li><a href="#x-x-vxworks">*-*-vxworks*</a>
    113  1.1  mrg <li><a href="#x86-64-x-x">x86_64-*-*</a> amd64-*-*
    114  1.3  mrg <li><a href="#x86-64-x-solaris210">x86_64-*-solaris2.1[0-9]*</a>
    115  1.1  mrg <li><a href="#xtensa-x-elf">xtensa*-*-elf</a>
    116  1.1  mrg <li><a href="#xtensa-x-linux">xtensa*-*-linux*</a>
    117  1.1  mrg <li><a href="#windows">Microsoft Windows</a>
    118  1.1  mrg <li><a href="#x-x-cygwin">*-*-cygwin</a>
    119  1.1  mrg <li><a href="#x-x-interix">*-*-interix</a>
    120  1.1  mrg <li><a href="#x-x-mingw32">*-*-mingw32</a>
    121  1.1  mrg <li><a href="#os2">OS/2</a>
    122  1.1  mrg <li><a href="#older">Older systems</a>
    123  1.1  mrg </ul>
    124  1.1  mrg 
    125  1.1  mrg      <ul>
    126  1.1  mrg <li><a href="#elf">all ELF targets</a> (SVR4, Solaris 2, etc.) 
    127  1.1  mrg </ul>
    128  1.1  mrg 
    129  1.1  mrg    <p><!-- -------- host/target specific issues start here ---------------- -->
    130  1.5  mrg <hr /><a name="aarch64_002dx_002dx"></a>
    131  1.1  mrg 
    132  1.5  mrg <h3 class="heading"><a name="TOC0"></a>aarch64*-*-*</h3>
    133  1.3  mrg 
    134  1.5  mrg <p>Binutils pre 2.24 does not have support for selecting <samp><span class="option">-mabi</span></samp> and
    135  1.5  mrg does not support ILP32.  If it is used to build GCC 4.9 or later, GCC will
    136  1.5  mrg not support option <samp><span class="option">-mabi=ilp32</span></samp>.
    137  1.5  mrg 
    138  1.5  mrg    <p>To enable a workaround for the Cortex-A53 erratum number 835769 by default
    139  1.3  mrg (for all CPUs regardless of -mcpu option given) at configure time use the
    140  1.3  mrg <samp><span class="option">--enable-fix-cortex-a53-835769</span></samp> option.  This will enable the fix by
    141  1.5  mrg default and can be explicitly disabled during compilation by passing the
    142  1.3  mrg <samp><span class="option">-mno-fix-cortex-a53-835769</span></samp> option.  Conversely,
    143  1.3  mrg <samp><span class="option">--disable-fix-cortex-a53-835769</span></samp> will disable the workaround by
    144  1.3  mrg default.  The workaround is disabled by default if neither of
    145  1.3  mrg <samp><span class="option">--enable-fix-cortex-a53-835769</span></samp> or
    146  1.3  mrg <samp><span class="option">--disable-fix-cortex-a53-835769</span></samp> is given at configure time.
    147  1.3  mrg 
    148  1.5  mrg    <p>To enable a workaround for the Cortex-A53 erratum number 843419 by default
    149  1.5  mrg (for all CPUs regardless of -mcpu option given) at configure time use the
    150  1.5  mrg <samp><span class="option">--enable-fix-cortex-a53-843419</span></samp> option.  This workaround is applied at
    151  1.5  mrg link time.  Enabling the workaround will cause GCC to pass the relevant option
    152  1.5  mrg to the linker.  It can be explicitly disabled during compilation by passing the
    153  1.5  mrg <samp><span class="option">-mno-fix-cortex-a53-843419</span></samp> option.  Conversely,
    154  1.5  mrg <samp><span class="option">--disable-fix-cortex-a53-843419</span></samp> will disable the workaround by default. 
    155  1.5  mrg The workaround is disabled by default if neither of
    156  1.5  mrg <samp><span class="option">--enable-fix-cortex-a53-843419</span></samp> or
    157  1.5  mrg <samp><span class="option">--disable-fix-cortex-a53-843419</span></samp> is given at configure time.
    158  1.5  mrg 
    159  1.5  mrg    <p><hr /><a name="alpha_002dx_002dx"></a>
    160  1.5  mrg 
    161  1.5  mrg <h3 class="heading"><a name="TOC1"></a>alpha*-*-*</h3>
    162  1.1  mrg 
    163  1.1  mrg <p>This section contains general configuration information for all
    164  1.1  mrg alpha-based platforms using ELF (in particular, ignore this section for
    165  1.1  mrg DEC OSF/1, Digital UNIX and Tru64 UNIX).  In addition to reading this
    166  1.1  mrg section, please read all other sections that match your target.
    167  1.1  mrg 
    168  1.1  mrg    <p>We require binutils 2.11.2 or newer. 
    169  1.1  mrg Previous binutils releases had a number of problems with DWARF 2
    170  1.1  mrg debugging information, not the least of which is incorrect linking of
    171  1.1  mrg shared libraries.
    172  1.1  mrg 
    173  1.5  mrg    <p><hr /><a name="alpha_002ddec_002dosf51"></a>
    174  1.1  mrg 
    175  1.5  mrg <h3 class="heading"><a name="TOC2"></a>alpha*-dec-osf5.1</h3>
    176  1.1  mrg 
    177  1.1  mrg <p>Systems using processors that implement the DEC Alpha architecture and
    178  1.1  mrg are running the DEC/Compaq/HP Unix (DEC OSF/1, Digital UNIX, or Compaq/HP
    179  1.1  mrg Tru64 UNIX) operating system, for example the DEC Alpha AXP systems.
    180  1.1  mrg 
    181  1.3  mrg    <p>Support for Tru64 UNIX V5.1 has been removed in GCC 4.8.  As of GCC 4.6,
    182  1.3  mrg support for Tru64 UNIX V4.0 and V5.0 has been removed.  As of GCC 3.2,
    183  1.3  mrg versions before <code>alpha*-dec-osf4</code> are no longer supported.  (These
    184  1.3  mrg are the versions which identify themselves as DEC OSF/1.)
    185  1.1  mrg 
    186  1.5  mrg    <p><hr /><a name="amd64_002dx_002dsolaris210"></a>
    187  1.1  mrg 
    188  1.5  mrg <h3 class="heading"><a name="TOC3"></a>amd64-*-solaris2.1[0-9]*</h3>
    189  1.1  mrg 
    190  1.3  mrg <p>This is a synonym for &lsquo;<samp><span class="samp">x86_64-*-solaris2.1[0-9]*</span></samp>&rsquo;.
    191  1.1  mrg 
    192  1.5  mrg    <p><hr /><a name="arc_002dx_002delf32"></a>
    193  1.5  mrg 
    194  1.5  mrg <h3 class="heading"><a name="TOC4"></a>arc-*-elf32</h3>
    195  1.5  mrg 
    196  1.5  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  1.5  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  1.5  mrg or &lsquo;<samp><span class="samp">arc700</span></samp>&rsquo;.
    199  1.5  mrg 
    200  1.5  mrg    <p><hr /><a name="arc_002dlinux_002duclibc"></a>
    201  1.5  mrg 
    202  1.5  mrg <h3 class="heading"><a name="TOC5"></a>arc-linux-uclibc</h3>
    203  1.5  mrg 
    204  1.5  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  1.5  mrg 
    206  1.5  mrg    <p><hr /><a name="arm_002dx_002deabi"></a>
    207  1.1  mrg 
    208  1.5  mrg <h3 class="heading"><a name="TOC6"></a>arm-*-eabi</h3>
    209  1.1  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  mrg <code>arm-*-netbsdelf</code>, <code>arm-*-*linux-*</code>
    213  1.3  mrg and <code>arm-*-rtemseabi</code>.
    214  1.1  mrg 
    215  1.5  mrg    <p><hr /><a name="avr"></a>
    216  1.1  mrg 
    217  1.5  mrg <h3 class="heading"><a name="TOC7"></a>avr</h3>
    218  1.1  mrg 
    219  1.1  mrg <p>ATMEL AVR-family micro controllers.  These are used in embedded
    220  1.1  mrg applications.  There are no standard Unix configurations. 
    221  1.1  mrg See &ldquo;AVR Options&rdquo; in the main manual
    222  1.1  mrg for the list of supported MCU types.
    223  1.1  mrg 
    224  1.1  mrg    <p>Use &lsquo;<samp><span class="samp">configure --target=avr --enable-languages="c"</span></samp>&rsquo; to configure GCC.
    225  1.1  mrg 
    226  1.1  mrg    <p>Further installation notes and other useful information about AVR tools
    227  1.1  mrg can also be obtained from:
    228  1.1  mrg 
    229  1.1  mrg      <ul>
    230  1.1  mrg <li><a href="http://www.nongnu.org/avr/">http://www.nongnu.org/avr/</a>
    231  1.1  mrg <li><a href="http://www.amelek.gda.pl/avr/">http://www.amelek.gda.pl/avr/</a>
    232  1.1  mrg </ul>
    233  1.1  mrg 
    234  1.1  mrg    <p>We <em>strongly</em> recommend using binutils 2.13 or newer.
    235  1.1  mrg 
    236  1.1  mrg    <p>The following error:
    237  1.3  mrg <pre class="smallexample">     Error: register required
    238  1.1  mrg </pre>
    239  1.1  mrg    <p>indicates that you should upgrade to a newer version of the binutils.
    240  1.1  mrg 
    241  1.5  mrg    <p><hr /><a name="bfin"></a>
    242  1.1  mrg 
    243  1.5  mrg <h3 class="heading"><a name="TOC8"></a>Blackfin</h3>
    244  1.1  mrg 
    245  1.1  mrg <p>The Blackfin processor, an Analog Devices DSP. 
    246  1.1  mrg See &ldquo;Blackfin Options&rdquo; in the main manual
    247  1.1  mrg 
    248  1.1  mrg    <p>More information, and a version of binutils with support for this processor,
    249  1.1  mrg is available at <a href="http://blackfin.uclinux.org">http://blackfin.uclinux.org</a>
    250  1.1  mrg 
    251  1.5  mrg    <p><hr /><a name="cr16"></a>
    252  1.1  mrg 
    253  1.5  mrg <h3 class="heading"><a name="TOC9"></a>CR16</h3>
    254  1.3  mrg 
    255  1.5  mrg <p>The CR16 CompactRISC architecture is a 16-bit architecture. This
    256  1.5  mrg architecture is used in embedded applications.
    257  1.3  mrg 
    258  1.3  mrg    <p>See &ldquo;CR16 Options&rdquo; in the main manual for a list of CR16-specific options.
    259  1.3  mrg 
    260  1.3  mrg    <p>Use &lsquo;<samp><span class="samp">configure --target=cr16-elf --enable-languages=c,c++</span></samp>&rsquo; to configure
    261  1.3  mrg GCC for building a CR16 elf cross-compiler.
    262  1.3  mrg 
    263  1.5  mrg    <p>Use &lsquo;<samp><span class="samp">configure --target=cr16-uclinux --enable-languages=c,c++</span></samp>&rsquo; to
    264  1.5  mrg configure GCC for building a CR16 uclinux cross-compiler.
    265  1.3  mrg 
    266  1.5  mrg    <p><hr /><a name="cris"></a>
    267  1.3  mrg 
    268  1.5  mrg <h3 class="heading"><a name="TOC10"></a>CRIS</h3>
    269  1.1  mrg 
    270  1.1  mrg <p>CRIS is the CPU architecture in Axis Communications ETRAX system-on-a-chip
    271  1.1  mrg series.  These are used in embedded applications.
    272  1.1  mrg 
    273  1.1  mrg    <p>See &ldquo;CRIS Options&rdquo; in the main manual
    274  1.1  mrg for a list of CRIS-specific options.
    275  1.1  mrg 
    276  1.1  mrg    <p>There are a few different CRIS targets:
    277  1.1  mrg      <dl>
    278  1.1  mrg <dt><code>cris-axis-elf</code><dd>Mainly for monolithic embedded systems.  Includes a multilib for the
    279  1.1  mrg &lsquo;<samp><span class="samp">v10</span></samp>&rsquo; core used in &lsquo;<samp><span class="samp">ETRAX 100 LX</span></samp>&rsquo;. 
    280  1.1  mrg <br><dt><code>cris-axis-linux-gnu</code><dd>A GNU/Linux port for the CRIS architecture, currently targeting
    281  1.1  mrg &lsquo;<samp><span class="samp">ETRAX 100 LX</span></samp>&rsquo; by default. 
    282  1.1  mrg </dl>
    283  1.1  mrg 
    284  1.1  mrg    <p>For <code>cris-axis-elf</code> you need binutils 2.11
    285  1.1  mrg or newer.  For <code>cris-axis-linux-gnu</code> you need binutils 2.12 or newer.
    286  1.1  mrg 
    287  1.1  mrg    <p>Pre-packaged tools can be obtained from
    288  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
    289  1.1  mrg information about this platform is available at
    290  1.1  mrg <a href="http://developer.axis.com/">http://developer.axis.com/</a>.
    291  1.1  mrg 
    292  1.5  mrg    <p><hr /><a name="dos"></a>
    293  1.1  mrg 
    294  1.5  mrg <h3 class="heading"><a name="TOC11"></a>DOS</h3>
    295  1.1  mrg 
    296  1.1  mrg <p>Please have a look at the <a href="binaries.html">binaries page</a>.
    297  1.1  mrg 
    298  1.1  mrg    <p>You cannot install GCC by itself on MSDOS; it will not compile under
    299  1.1  mrg any MSDOS compiler except itself.  You need to get the complete
    300  1.1  mrg compilation package DJGPP, which includes binaries as well as sources,
    301  1.1  mrg and includes all the necessary compilation tools and libraries.
    302  1.1  mrg 
    303  1.5  mrg    <p><hr /><a name="epiphany_002dx_002delf"></a>
    304  1.1  mrg 
    305  1.5  mrg <h3 class="heading"><a name="TOC12"></a>epiphany-*-elf</h3>
    306  1.3  mrg 
    307  1.3  mrg <p>Adapteva Epiphany. 
    308  1.3  mrg This configuration is intended for embedded systems.
    309  1.3  mrg 
    310  1.5  mrg    <p><hr /><a name="x_002dx_002dfreebsd"></a>
    311  1.3  mrg 
    312  1.5  mrg <h3 class="heading"><a name="TOC13"></a>*-*-freebsd*</h3>
    313  1.1  mrg 
    314  1.1  mrg <p>Support for FreeBSD 1 was discontinued in GCC 3.2.  Support for
    315  1.1  mrg FreeBSD 2 (and any mutant a.out variants of FreeBSD 3) was
    316  1.1  mrg discontinued in GCC 4.0.
    317  1.1  mrg 
    318  1.3  mrg    <p>In order to better utilize FreeBSD base system functionality and match
    319  1.3  mrg the configuration of the system compiler, GCC 4.5 and above as well as
    320  1.3  mrg GCC 4.4 past 2010-06-20 leverage SSP support in libc (which is present
    321  1.3  mrg on FreeBSD 7 or later) and the use of <code>__cxa_atexit</code> by default
    322  1.3  mrg (on FreeBSD 6 or later).  The use of <code>dl_iterate_phdr</code> inside
    323  1.3  mrg <samp><span class="file">libgcc_s.so.1</span></samp> and boehm-gc (on FreeBSD 7 or later) is enabled
    324  1.3  mrg by GCC 4.5 and above.
    325  1.1  mrg 
    326  1.1  mrg    <p>We support FreeBSD using the ELF file format with DWARF 2 debugging
    327  1.1  mrg for all CPU architectures.  You may use <samp><span class="option">-gstabs</span></samp> instead of
    328  1.1  mrg <samp><span class="option">-g</span></samp>, if you really want the old debugging format.  There are
    329  1.1  mrg no known issues with mixing object files and libraries with different
    330  1.1  mrg debugging formats.  Otherwise, this release of GCC should now match
    331  1.1  mrg more of the configuration used in the stock FreeBSD configuration of
    332  1.1  mrg GCC.  In particular, <samp><span class="option">--enable-threads</span></samp> is now configured by
    333  1.1  mrg default.  However, as a general user, do not attempt to replace the
    334  1.1  mrg system compiler with this release.  Known to bootstrap and check with
    335  1.1  mrg good results on FreeBSD 7.2-STABLE.  In the past, known to bootstrap
    336  1.1  mrg and check with good results on FreeBSD 3.0, 3.4, 4.0, 4.2, 4.3, 4.4,
    337  1.1  mrg 4.5, 4.8, 4.9 and 5-CURRENT.
    338  1.1  mrg 
    339  1.1  mrg    <p>The version of binutils installed in <samp><span class="file">/usr/bin</span></samp> probably works
    340  1.1  mrg with this release of GCC.  Bootstrapping against the latest GNU
    341  1.1  mrg binutils and/or the version found in <samp><span class="file">/usr/ports/devel/binutils</span></samp> has
    342  1.1  mrg been known to enable additional features and improve overall testsuite
    343  1.1  mrg results.  However, it is currently known that boehm-gc (which itself
    344  1.1  mrg is required for java) may not configure properly on FreeBSD prior to
    345  1.1  mrg the FreeBSD 7.0 release with GNU binutils after 2.16.1.
    346  1.1  mrg 
    347  1.5  mrg    <p><hr /><a name="h8300_002dhms"></a>
    348  1.1  mrg 
    349  1.5  mrg <h3 class="heading"><a name="TOC14"></a>h8300-hms</h3>
    350  1.1  mrg 
    351  1.1  mrg <p>Renesas H8/300 series of processors.
    352  1.1  mrg 
    353  1.1  mrg    <p>Please have a look at the <a href="binaries.html">binaries page</a>.
    354  1.1  mrg 
    355  1.1  mrg    <p>The calling convention and structure layout has changed in release 2.6. 
    356  1.1  mrg All code must be recompiled.  The calling convention now passes the
    357  1.1  mrg first three arguments in function calls in registers.  Structures are no
    358  1.1  mrg longer a multiple of 2 bytes.
    359  1.1  mrg 
    360  1.5  mrg    <p><hr /><a name="hppa_002dhp_002dhpux"></a>
    361  1.1  mrg 
    362  1.5  mrg <h3 class="heading"><a name="TOC15"></a>hppa*-hp-hpux*</h3>
    363  1.1  mrg 
    364  1.1  mrg <p>Support for HP-UX version 9 and older was discontinued in GCC 3.4.
    365  1.1  mrg 
    366  1.1  mrg    <p>We require using gas/binutils on all hppa platforms.  Version 2.19 or
    367  1.1  mrg later is recommended.
    368  1.1  mrg 
    369  1.1  mrg    <p>It may be helpful to configure GCC with the
    370  1.1  mrg <a href="./configure.html#with-gnu-as"><samp><span class="option">--with-gnu-as</span></samp></a> and
    371  1.1  mrg <samp><span class="option">--with-as=...</span></samp> options to ensure that GCC can find GAS.
    372  1.1  mrg 
    373  1.1  mrg    <p>The HP assembler should not be used with GCC.  It is rarely tested and may
    374  1.1  mrg not work.  It shouldn't be used with any languages other than C due to its
    375  1.1  mrg many limitations.
    376  1.1  mrg 
    377  1.1  mrg    <p>Specifically, <samp><span class="option">-g</span></samp> does not work (HP-UX uses a peculiar debugging
    378  1.1  mrg format which GCC does not know about).  It also inserts timestamps
    379  1.1  mrg into each object file it creates, causing the 3-stage comparison test to
    380  1.1  mrg fail during a bootstrap.  You should be able to continue by saying
    381  1.1  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;.
    382  1.1  mrg 
    383  1.1  mrg    <p>Various GCC features are not supported.  For example, it does not support weak
    384  1.1  mrg symbols or alias definitions.  As a result, explicit template instantiations
    385  1.1  mrg are required when using C++.  This makes it difficult if not impossible to
    386  1.1  mrg build many C++ applications.
    387  1.1  mrg 
    388  1.1  mrg    <p>There are two default scheduling models for instructions.  These are
    389  1.1  mrg PROCESSOR_7100LC and PROCESSOR_8000.  They are selected from the pa-risc
    390  1.1  mrg architecture specified for the target machine when configuring. 
    391  1.1  mrg PROCESSOR_8000 is the default.  PROCESSOR_7100LC is selected when
    392  1.1  mrg the target is a &lsquo;<samp><span class="samp">hppa1*</span></samp>&rsquo; machine.
    393  1.1  mrg 
    394  1.1  mrg    <p>The PROCESSOR_8000 model is not well suited to older processors.  Thus,
    395  1.1  mrg it is important to completely specify the machine architecture when
    396  1.1  mrg configuring if you want a model other than PROCESSOR_8000.  The macro
    397  1.1  mrg TARGET_SCHED_DEFAULT can be defined in BOOT_CFLAGS if a different
    398  1.1  mrg default scheduling model is desired.
    399  1.1  mrg 
    400  1.1  mrg    <p>As of GCC 4.0, GCC uses the UNIX 95 namespace for HP-UX 10.10
    401  1.1  mrg through 11.00, and the UNIX 98 namespace for HP-UX 11.11 and later. 
    402  1.1  mrg This namespace change might cause problems when bootstrapping with
    403  1.1  mrg an earlier version of GCC or the HP compiler as essentially the same
    404  1.1  mrg namespace is required for an entire build.  This problem can be avoided
    405  1.1  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;
    406  1.1  mrg or &lsquo;<samp><span class="samp">98</span></samp>&rsquo;.  Another way is to add an appropriate set of predefines
    407  1.1  mrg to <samp><span class="env">CC</span></samp>.  The description for the <samp><span class="option">munix=</span></samp> option contains
    408  1.1  mrg a list of the predefines used with each standard.
    409  1.1  mrg 
    410  1.1  mrg    <p>More specific information to &lsquo;<samp><span class="samp">hppa*-hp-hpux*</span></samp>&rsquo; targets follows.
    411  1.1  mrg 
    412  1.5  mrg    <p><hr /><a name="hppa_002dhp_002dhpux10"></a>
    413  1.1  mrg 
    414  1.5  mrg <h3 class="heading"><a name="TOC16"></a>hppa*-hp-hpux10</h3>
    415  1.1  mrg 
    416  1.1  mrg <p>For hpux10.20, we <em>highly</em> recommend you pick up the latest sed patch
    417  1.1  mrg <code>PHCO_19798</code> from HP.
    418  1.1  mrg 
    419  1.1  mrg    <p>The C++ ABI has changed incompatibly in GCC 4.0.  COMDAT subspaces are
    420  1.1  mrg used for one-only code and data.  This resolves many of the previous
    421  1.1  mrg problems in using C++ on this target.  However, the ABI is not compatible
    422  1.1  mrg with the one implemented under HP-UX 11 using secondary definitions.
    423  1.1  mrg 
    424  1.5  mrg    <p><hr /><a name="hppa_002dhp_002dhpux11"></a>
    425  1.1  mrg 
    426  1.5  mrg <h3 class="heading"><a name="TOC17"></a>hppa*-hp-hpux11</h3>
    427  1.1  mrg 
    428  1.1  mrg <p>GCC 3.0 and up support HP-UX 11.  GCC 2.95.x is not supported and cannot
    429  1.1  mrg be used to compile GCC 3.0 and up.
    430  1.1  mrg 
    431  1.1  mrg    <p>The libffi and libjava libraries haven't been ported to 64-bit HP-UX and don't build.
    432  1.1  mrg 
    433  1.1  mrg    <p>Refer to <a href="binaries.html">binaries</a> for information about obtaining
    434  1.1  mrg precompiled GCC binaries for HP-UX.  Precompiled binaries must be obtained
    435  1.1  mrg to build the Ada language as it can't be bootstrapped using C.  Ada is
    436  1.1  mrg only available for the 32-bit PA-RISC runtime.
    437  1.1  mrg 
    438  1.1  mrg    <p>Starting with GCC 3.4 an ISO C compiler is required to bootstrap.  The
    439  1.1  mrg bundled compiler supports only traditional C; you will need either HP's
    440  1.1  mrg unbundled compiler, or a binary distribution of GCC.
    441  1.1  mrg 
    442  1.1  mrg    <p>It is possible to build GCC 3.3 starting with the bundled HP compiler,
    443  1.1  mrg but the process requires several steps.  GCC 3.3 can then be used to
    444  1.1  mrg build later versions.  The fastjar program contains ISO C code and
    445  1.1  mrg can't be built with the HP bundled compiler.  This problem can be
    446  1.1  mrg avoided by not building the Java language.  For example, use the
    447  1.1  mrg <samp><span class="option">--enable-languages="c,c++,f77,objc"</span></samp> option in your configure
    448  1.1  mrg command.
    449  1.1  mrg 
    450  1.1  mrg    <p>There are several possible approaches to building the distribution. 
    451  1.1  mrg Binutils can be built first using the HP tools.  Then, the GCC
    452  1.1  mrg distribution can be built.  The second approach is to build GCC
    453  1.1  mrg first using the HP tools, then build binutils, then rebuild GCC. 
    454  1.1  mrg There have been problems with various binary distributions, so it
    455  1.1  mrg is best not to start from a binary distribution.
    456  1.1  mrg 
    457  1.1  mrg    <p>On 64-bit capable systems, there are two distinct targets.  Different
    458  1.1  mrg installation prefixes must be used if both are to be installed on
    459  1.1  mrg the same system.  The &lsquo;<samp><span class="samp">hppa[1-2]*-hp-hpux11*</span></samp>&rsquo; target generates code
    460  1.1  mrg for the 32-bit PA-RISC runtime architecture and uses the HP linker. 
    461  1.1  mrg The &lsquo;<samp><span class="samp">hppa64-hp-hpux11*</span></samp>&rsquo; target generates 64-bit code for the
    462  1.1  mrg PA-RISC 2.0 architecture.
    463  1.1  mrg 
    464  1.1  mrg    <p>The script config.guess now selects the target type based on the compiler
    465  1.1  mrg detected during configuration.  You must define <samp><span class="env">PATH</span></samp> or <samp><span class="env">CC</span></samp> so
    466  1.1  mrg that configure finds an appropriate compiler for the initial bootstrap. 
    467  1.1  mrg When <samp><span class="env">CC</span></samp> is used, the definition should contain the options that are
    468  1.1  mrg needed whenever <samp><span class="env">CC</span></samp> is used.
    469  1.1  mrg 
    470  1.1  mrg    <p>Specifically, options that determine the runtime architecture must be
    471  1.1  mrg in <samp><span class="env">CC</span></samp> to correctly select the target for the build.  It is also
    472  1.1  mrg convenient to place many other compiler options in <samp><span class="env">CC</span></samp>.  For example,
    473  1.1  mrg <samp><span class="env">CC="cc -Ac +DA2.0W -Wp,-H16376 -D_CLASSIC_TYPES -D_HPUX_SOURCE"</span></samp>
    474  1.1  mrg can be used to bootstrap the GCC 3.3 branch with the HP compiler in
    475  1.1  mrg 64-bit K&amp;R/bundled mode.  The <samp><span class="option">+DA2.0W</span></samp> option will result in
    476  1.1  mrg the automatic selection of the &lsquo;<samp><span class="samp">hppa64-hp-hpux11*</span></samp>&rsquo; target.  The
    477  1.1  mrg macro definition table of cpp needs to be increased for a successful
    478  1.1  mrg build with the HP compiler.  _CLASSIC_TYPES and _HPUX_SOURCE need to
    479  1.1  mrg be defined when building with the bundled compiler, or when using the
    480  1.1  mrg <samp><span class="option">-Ac</span></samp> option.  These defines aren't necessary with <samp><span class="option">-Ae</span></samp>.
    481  1.1  mrg 
    482  1.1  mrg    <p>It is best to explicitly configure the &lsquo;<samp><span class="samp">hppa64-hp-hpux11*</span></samp>&rsquo; target
    483  1.1  mrg with the <samp><span class="option">--with-ld=...</span></samp> option.  This overrides the standard
    484  1.1  mrg search for ld.  The two linkers supported on this target require different
    485  1.1  mrg commands.  The default linker is determined during configuration.  As a
    486  1.1  mrg result, it's not possible to switch linkers in the middle of a GCC build. 
    487  1.1  mrg This has been reported to sometimes occur in unified builds of binutils
    488  1.1  mrg and GCC.
    489  1.1  mrg 
    490  1.1  mrg    <p>A recent linker patch must be installed for the correct operation of
    491  1.1  mrg GCC 3.3 and later.  <code>PHSS_26559</code> and <code>PHSS_24304</code> are the
    492  1.1  mrg oldest linker patches that are known to work.  They are for HP-UX
    493  1.1  mrg 11.00 and 11.11, respectively.  <code>PHSS_24303</code>, the companion to
    494  1.1  mrg <code>PHSS_24304</code>, might be usable but it hasn't been tested.  These
    495  1.1  mrg patches have been superseded.  Consult the HP patch database to obtain
    496  1.1  mrg the currently recommended linker patch for your system.
    497  1.1  mrg 
    498  1.1  mrg    <p>The patches are necessary for the support of weak symbols on the
    499  1.1  mrg 32-bit port, and for the running of initializers and finalizers.  Weak
    500  1.1  mrg symbols are implemented using SOM secondary definition symbols.  Prior
    501  1.1  mrg to HP-UX 11, there are bugs in the linker support for secondary symbols. 
    502  1.1  mrg The patches correct a problem of linker core dumps creating shared
    503  1.1  mrg libraries containing secondary symbols, as well as various other
    504  1.1  mrg linking issues involving secondary symbols.
    505  1.1  mrg 
    506  1.1  mrg    <p>GCC 3.3 uses the ELF DT_INIT_ARRAY and DT_FINI_ARRAY capabilities to
    507  1.1  mrg run initializers and finalizers on the 64-bit port.  The 32-bit port
    508  1.1  mrg uses the linker <samp><span class="option">+init</span></samp> and <samp><span class="option">+fini</span></samp> options for the same
    509  1.1  mrg purpose.  The patches correct various problems with the +init/+fini
    510  1.1  mrg options, including program core dumps.  Binutils 2.14 corrects a
    511  1.1  mrg problem on the 64-bit port resulting from HP's non-standard use of
    512  1.1  mrg the .init and .fini sections for array initializers and finalizers.
    513  1.1  mrg 
    514  1.1  mrg    <p>Although the HP and GNU linkers are both supported for the
    515  1.1  mrg &lsquo;<samp><span class="samp">hppa64-hp-hpux11*</span></samp>&rsquo; target, it is strongly recommended that the
    516  1.1  mrg HP linker be used for link editing on this target.
    517  1.1  mrg 
    518  1.1  mrg    <p>At this time, the GNU linker does not support the creation of long
    519  1.1  mrg branch stubs.  As a result, it can't successfully link binaries
    520  1.1  mrg containing branch offsets larger than 8 megabytes.  In addition,
    521  1.1  mrg there are problems linking shared libraries, linking executables
    522  1.1  mrg with <samp><span class="option">-static</span></samp>, and with dwarf2 unwind and exception support. 
    523  1.1  mrg It also doesn't provide stubs for internal calls to global functions
    524  1.1  mrg in shared libraries, so these calls can't be overloaded.
    525  1.1  mrg 
    526  1.1  mrg    <p>The HP dynamic loader does not support GNU symbol versioning, so symbol
    527  1.1  mrg versioning is not supported.  It may be necessary to disable symbol
    528  1.1  mrg versioning with <samp><span class="option">--disable-symvers</span></samp> when using GNU ld.
    529  1.1  mrg 
    530  1.1  mrg    <p>POSIX threads are the default.  The optional DCE thread library is not
    531  1.1  mrg supported, so <samp><span class="option">--enable-threads=dce</span></samp> does not work.
    532  1.1  mrg 
    533  1.5  mrg    <p><hr /><a name="x_002dx_002dlinux_002dgnu"></a>
    534  1.1  mrg 
    535  1.5  mrg <h3 class="heading"><a name="TOC18"></a>*-*-linux-gnu</h3>
    536  1.1  mrg 
    537  1.1  mrg <p>Versions of libstdc++-v3 starting with 3.2.1 require bug fixes present
    538  1.1  mrg in glibc 2.2.5 and later.  More information is available in the
    539  1.1  mrg libstdc++-v3 documentation.
    540  1.1  mrg 
    541  1.5  mrg    <p><hr /><a name="ix86_002dx_002dlinux"></a>
    542  1.1  mrg 
    543  1.5  mrg <h3 class="heading"><a name="TOC19"></a>i?86-*-linux*</h3>
    544  1.1  mrg 
    545  1.1  mrg <p>As of GCC 3.3, binutils 2.13.1 or later is required for this platform. 
    546  1.1  mrg See <a href="http://gcc.gnu.org/PR10877">bug 10877</a> for more information.
    547  1.1  mrg 
    548  1.1  mrg    <p>If you receive Signal 11 errors when building on GNU/Linux, then it is
    549  1.1  mrg possible you have a hardware problem.  Further information on this can be
    550  1.1  mrg found on <a href="http://www.bitwizard.nl/sig11/">www.bitwizard.nl</a>.
    551  1.1  mrg 
    552  1.5  mrg    <p><hr /><a name="ix86_002dx_002dsolaris210"></a>
    553  1.1  mrg 
    554  1.5  mrg <h3 class="heading"><a name="TOC20"></a>i?86-*-solaris2.10</h3>
    555  1.1  mrg 
    556  1.3  mrg <p>Use this for Solaris 10 or later on x86 and x86-64 systems.  Starting
    557  1.3  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
    558  1.3  mrg &lsquo;<samp><span class="samp">x86_64-*-solaris2.1[0-9]*</span></samp>&rsquo; configuration that corresponds to
    559  1.3  mrg &lsquo;<samp><span class="samp">sparcv9-sun-solaris2*</span></samp>&rsquo;.
    560  1.1  mrg 
    561  1.1  mrg    <p>It is recommended that you configure GCC to use the GNU assembler, in
    562  1.1  mrg <samp><span class="file">/usr/sfw/bin/gas</span></samp>.  The versions included in Solaris 10, from GNU
    563  1.1  mrg binutils 2.15, and Solaris 11, from GNU binutils 2.19, work fine,
    564  1.1  mrg although the current version, from GNU binutils
    565  1.3  mrg 2.22, is known to work, too.  Recent versions of the Sun assembler in
    566  1.1  mrg <samp><span class="file">/usr/ccs/bin/as</span></samp> work almost as well, though. 
    567  1.1  mrg <!-- FIXME: as patch requirements? -->
    568  1.1  mrg 
    569  1.1  mrg    <p>For linking, the Sun linker, is preferred.  If you want to use the GNU
    570  1.1  mrg linker instead, which is available in <samp><span class="file">/usr/sfw/bin/gld</span></samp>, note that
    571  1.1  mrg due to a packaging bug the version in Solaris 10, from GNU binutils
    572  1.1  mrg 2.15, cannot be used, while the version in Solaris 11, from GNU binutils
    573  1.3  mrg 2.19, works, as does the latest version, from GNU binutils 2.22.
    574  1.1  mrg 
    575  1.1  mrg    <p>To use GNU <samp><span class="command">as</span></samp>, configure with the options
    576  1.1  mrg <samp><span class="option">--with-gnu-as --with-as=/usr/sfw/bin/gas</span></samp>.  It may be necessary
    577  1.1  mrg to configure with <samp><span class="option">--without-gnu-ld --with-ld=/usr/ccs/bin/ld</span></samp> to
    578  1.1  mrg guarantee use of Sun <samp><span class="command">ld</span></samp>. 
    579  1.1  mrg <!-- FIXME: why -without-gnu-ld -with-ld? -->
    580  1.1  mrg 
    581  1.5  mrg    <p><hr /><a name="ia64_002dx_002dlinux"></a>
    582  1.1  mrg 
    583  1.5  mrg <h3 class="heading"><a name="TOC21"></a>ia64-*-linux</h3>
    584  1.1  mrg 
    585  1.1  mrg <p>IA-64 processor (also known as IPF, or Itanium Processor Family)
    586  1.1  mrg running GNU/Linux.
    587  1.1  mrg 
    588  1.1  mrg    <p>If you are using the installed system libunwind library with
    589  1.1  mrg <samp><span class="option">--with-system-libunwind</span></samp>, then you must use libunwind 0.98 or
    590  1.1  mrg later.
    591  1.1  mrg 
    592  1.1  mrg    <p>None of the following versions of GCC has an ABI that is compatible
    593  1.1  mrg with any of the other versions in this list, with the exception that
    594  1.1  mrg Red Hat 2.96 and Trillian 000171 are compatible with each other:
    595  1.1  mrg 3.1, 3.0.2, 3.0.1, 3.0, Red Hat 2.96, and Trillian 000717. 
    596  1.1  mrg This primarily affects C++ programs and programs that create shared libraries. 
    597  1.1  mrg GCC 3.1 or later is recommended for compiling linux, the kernel. 
    598  1.1  mrg As of version 3.1 GCC is believed to be fully ABI compliant, and hence no
    599  1.1  mrg more major ABI changes are expected.
    600  1.1  mrg 
    601  1.5  mrg    <p><hr /><a name="ia64_002dx_002dhpux"></a>
    602  1.1  mrg 
    603  1.5  mrg <h3 class="heading"><a name="TOC22"></a>ia64-*-hpux*</h3>
    604  1.1  mrg 
    605  1.1  mrg <p>Building GCC on this target requires the GNU Assembler.  The bundled HP
    606  1.1  mrg assembler will not work.  To prevent GCC from using the wrong assembler,
    607  1.1  mrg the option <samp><span class="option">--with-gnu-as</span></samp> may be necessary.
    608  1.1  mrg 
    609  1.1  mrg    <p>The GCC libunwind library has not been ported to HPUX.  This means that for
    610  1.1  mrg GCC versions 3.2.3 and earlier, <samp><span class="option">--enable-libunwind-exceptions</span></samp>
    611  1.1  mrg is required to build GCC.  For GCC 3.3 and later, this is the default. 
    612  1.1  mrg For gcc 3.4.3 and later, <samp><span class="option">--enable-libunwind-exceptions</span></samp> is
    613  1.1  mrg removed and the system libunwind library will always be used.
    614  1.1  mrg 
    615  1.1  mrg    <p><hr />
    616  1.5  mrg <!-- rs6000-ibm-aix*, powerpc-ibm-aix* --><a name="x_002dibm_002daix"></a>
    617  1.1  mrg 
    618  1.5  mrg <h3 class="heading"><a name="TOC23"></a>*-ibm-aix*</h3>
    619  1.1  mrg 
    620  1.1  mrg <p>Support for AIX version 3 and older was discontinued in GCC 3.4. 
    621  1.1  mrg Support for AIX version 4.2 and older was discontinued in GCC 4.5.
    622  1.1  mrg 
    623  1.1  mrg    <p>&ldquo;out of memory&rdquo; bootstrap failures may indicate a problem with
    624  1.1  mrg process resource limits (ulimit).  Hard limits are configured in the
    625  1.1  mrg <samp><span class="file">/etc/security/limits</span></samp> system configuration file.
    626  1.1  mrg 
    627  1.1  mrg    <p>GCC can bootstrap with recent versions of IBM XLC, but bootstrapping
    628  1.1  mrg with an earlier release of GCC is recommended.  Bootstrapping with XLC
    629  1.1  mrg requires a larger data segment, which can be enabled through the
    630  1.1  mrg <var>LDR_CNTRL</var> environment variable, e.g.,
    631  1.1  mrg 
    632  1.3  mrg <pre class="smallexample">     % LDR_CNTRL=MAXDATA=0x50000000
    633  1.3  mrg      % export LDR_CNTRL
    634  1.1  mrg </pre>
    635  1.1  mrg    <p>One can start with a pre-compiled version of GCC to build from
    636  1.1  mrg sources.  One may delete GCC's &ldquo;fixed&rdquo; header files when starting
    637  1.1  mrg with a version of GCC built for an earlier release of AIX.
    638  1.1  mrg 
    639  1.1  mrg    <p>To speed up the configuration phases of bootstrapping and installing GCC,
    640  1.1  mrg one may use GNU Bash instead of AIX <samp><span class="command">/bin/sh</span></samp>, e.g.,
    641  1.1  mrg 
    642  1.3  mrg <pre class="smallexample">     % CONFIG_SHELL=/opt/freeware/bin/bash
    643  1.3  mrg      % export CONFIG_SHELL
    644  1.1  mrg </pre>
    645  1.1  mrg    <p>and then proceed as described in <a href="build.html">the build instructions</a>, where we strongly recommend specifying an absolute path
    646  1.1  mrg to invoke <var>srcdir</var>/configure.
    647  1.1  mrg 
    648  1.1  mrg    <p>Because GCC on AIX is built as a 32-bit executable by default,
    649  1.1  mrg (although it can generate 64-bit programs) the GMP and MPFR libraries
    650  1.1  mrg required by gfortran must be 32-bit libraries.  Building GMP and MPFR
    651  1.1  mrg as static archive libraries works better than shared libraries.
    652  1.1  mrg 
    653  1.1  mrg    <p>Errors involving <code>alloca</code> when building GCC generally are due
    654  1.1  mrg to an incorrect definition of <code>CC</code> in the Makefile or mixing files
    655  1.1  mrg compiled with the native C compiler and GCC.  During the stage1 phase of
    656  1.1  mrg the build, the native AIX compiler <strong>must</strong> be invoked as <samp><span class="command">cc</span></samp>
    657  1.1  mrg (not <samp><span class="command">xlc</span></samp>).  Once <samp><span class="command">configure</span></samp> has been informed of
    658  1.1  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
    659  1.1  mrg configure cache files and ensure that <samp><span class="env">CC</span></samp> environment variable
    660  1.1  mrg does not provide a definition that will confuse <samp><span class="command">configure</span></samp>. 
    661  1.1  mrg If this error occurs during stage2 or later, then the problem most likely
    662  1.1  mrg is the version of Make (see above).
    663  1.1  mrg 
    664  1.3  mrg    <p>The native <samp><span class="command">as</span></samp> and <samp><span class="command">ld</span></samp> are recommended for
    665  1.3  mrg bootstrapping on AIX.  The GNU Assembler, GNU Linker, and GNU
    666  1.3  mrg Binutils version 2.20 is the minimum level that supports bootstrap on
    667  1.3  mrg AIX 5.  The GNU Assembler has not been updated to support AIX 6 or
    668  1.3  mrg AIX 7.  The native AIX tools do interoperate with GCC.
    669  1.3  mrg 
    670  1.3  mrg    <p>AIX 5.3 TL10, AIX 6.1 TL05 and AIX 7.1 TL00 introduced an AIX
    671  1.3  mrg assembler change that sometimes produces corrupt assembly files
    672  1.3  mrg causing AIX linker errors.  The bug breaks GCC bootstrap on AIX and
    673  1.3  mrg can cause compilation failures with existing GCC installations.  An
    674  1.3  mrg AIX iFix for AIX 5.3 is available (APAR IZ98385 for AIX 5.3 TL10, APAR
    675  1.3  mrg IZ98477 for AIX 5.3 TL11 and IZ98134 for AIX 5.3 TL12). AIX 5.3 TL11 SP8,
    676  1.3  mrg AIX 5.3 TL12 SP5, AIX 6.1 TL04 SP11, AIX 6.1 TL05 SP7, AIX 6.1 TL06 SP6,
    677  1.3  mrg AIX 6.1 TL07 and AIX 7.1 TL01 should include the fix.
    678  1.1  mrg 
    679  1.1  mrg    <p>Building <samp><span class="file">libstdc++.a</span></samp> requires a fix for an AIX Assembler bug
    680  1.1  mrg APAR IY26685 (AIX 4.3) or APAR IY25528 (AIX 5.1).  It also requires a
    681  1.1  mrg fix for another AIX Assembler bug and a co-dependent AIX Archiver fix
    682  1.1  mrg referenced as APAR IY53606 (AIX 5.2) or as APAR IY54774 (AIX 5.1)
    683  1.1  mrg 
    684  1.5  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
    685  1.1  mrg shared object and GCC installation places the <samp><span class="file">libstdc++.a</span></samp>
    686  1.1  mrg shared library in a common location which will overwrite the and GCC
    687  1.1  mrg 3.3 version of the shared library.  Applications either need to be
    688  1.1  mrg re-linked against the new shared library or the GCC 3.1 and GCC 3.3
    689  1.1  mrg versions of the &lsquo;<samp><span class="samp">libstdc++</span></samp>&rsquo; shared object needs to be available
    690  1.1  mrg to the AIX runtime loader.  The GCC 3.1 &lsquo;<samp><span class="samp">libstdc++.so.4</span></samp>&rsquo;, if
    691  1.1  mrg present, and GCC 3.3 &lsquo;<samp><span class="samp">libstdc++.so.5</span></samp>&rsquo; shared objects can be
    692  1.1  mrg installed for runtime dynamic loading using the following steps to set
    693  1.1  mrg the &lsquo;<samp><span class="samp">F_LOADONLY</span></samp>&rsquo; flag in the shared object for <em>each</em>
    694  1.1  mrg multilib <samp><span class="file">libstdc++.a</span></samp> installed:
    695  1.1  mrg 
    696  1.1  mrg    <p>Extract the shared objects from the currently installed
    697  1.1  mrg <samp><span class="file">libstdc++.a</span></samp> archive:
    698  1.3  mrg <pre class="smallexample">     % ar -x libstdc++.a libstdc++.so.4 libstdc++.so.5
    699  1.1  mrg </pre>
    700  1.1  mrg    <p>Enable the &lsquo;<samp><span class="samp">F_LOADONLY</span></samp>&rsquo; flag so that the shared object will be
    701  1.1  mrg available for runtime dynamic loading, but not linking:
    702  1.3  mrg <pre class="smallexample">     % strip -e libstdc++.so.4 libstdc++.so.5
    703  1.1  mrg </pre>
    704  1.1  mrg    <p>Archive the runtime-only shared object in the GCC 3.4
    705  1.1  mrg <samp><span class="file">libstdc++.a</span></samp> archive:
    706  1.3  mrg <pre class="smallexample">     % ar -q libstdc++.a libstdc++.so.4 libstdc++.so.5
    707  1.1  mrg </pre>
    708  1.5  mrg    <p>Eventually, the
    709  1.5  mrg <a href="./configure.html#WithAixSoname"><samp><span class="option">--with-aix-soname=svr4</span></samp></a>
    710  1.5  mrg configure option may drop the need for this procedure for libraries that
    711  1.5  mrg support it.
    712  1.5  mrg 
    713  1.1  mrg    <p>Linking executables and shared libraries may produce warnings of
    714  1.1  mrg duplicate symbols.  The assembly files generated by GCC for AIX always
    715  1.1  mrg have included multiple symbol definitions for certain global variable
    716  1.1  mrg and function declarations in the original program.  The warnings should
    717  1.1  mrg not prevent the linker from producing a correct library or runnable
    718  1.1  mrg executable.
    719  1.1  mrg 
    720  1.1  mrg    <p>AIX 4.3 utilizes a &ldquo;large format&rdquo; archive to support both 32-bit and
    721  1.1  mrg 64-bit object modules.  The routines provided in AIX 4.3.0 and AIX 4.3.1
    722  1.1  mrg to parse archive libraries did not handle the new format correctly. 
    723  1.1  mrg These routines are used by GCC and result in error messages during
    724  1.1  mrg linking such as &ldquo;not a COFF file&rdquo;.  The version of the routines shipped
    725  1.1  mrg with AIX 4.3.1 should work for a 32-bit environment.  The <samp><span class="option">-g</span></samp>
    726  1.1  mrg option of the archive command may be used to create archives of 32-bit
    727  1.1  mrg objects using the original &ldquo;small format&rdquo;.  A correct version of the
    728  1.1  mrg routines is shipped with AIX 4.3.2 and above.
    729  1.1  mrg 
    730  1.1  mrg    <p>Some versions of the AIX binder (linker) can fail with a relocation
    731  1.1  mrg overflow severe error when the <samp><span class="option">-bbigtoc</span></samp> option is used to link
    732  1.1  mrg GCC-produced object files into an executable that overflows the TOC.  A fix
    733  1.1  mrg for APAR IX75823 (OVERFLOW DURING LINK WHEN USING GCC AND -BBIGTOC) is
    734  1.1  mrg available from IBM Customer Support and from its
    735  1.1  mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
    736  1.1  mrg website as PTF U455193.
    737  1.1  mrg 
    738  1.1  mrg    <p>The AIX 4.3.2.1 linker (bos.rte.bind_cmds Level 4.3.2.1) will dump core
    739  1.1  mrg with a segmentation fault when invoked by any version of GCC.  A fix for
    740  1.1  mrg APAR IX87327 is available from IBM Customer Support and from its
    741  1.1  mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
    742  1.1  mrg website as PTF U461879.  This fix is incorporated in AIX 4.3.3 and above.
    743  1.1  mrg 
    744  1.1  mrg    <p>The initial assembler shipped with AIX 4.3.0 generates incorrect object
    745  1.1  mrg files.  A fix for APAR IX74254 (64BIT DISASSEMBLED OUTPUT FROM COMPILER FAILS
    746  1.1  mrg TO ASSEMBLE/BIND) is available from IBM Customer Support and from its
    747  1.1  mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
    748  1.1  mrg website as PTF U453956.  This fix is incorporated in AIX 4.3.1 and above.
    749  1.1  mrg 
    750  1.1  mrg    <p>AIX provides National Language Support (NLS).  Compilers and assemblers
    751  1.1  mrg use NLS to support locale-specific representations of various data
    752  1.1  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
    753  1.1  mrg separating decimal fractions).  There have been problems reported where
    754  1.1  mrg GCC does not produce the same floating-point formats that the assembler
    755  1.1  mrg expects.  If one encounters this problem, set the <samp><span class="env">LANG</span></samp>
    756  1.1  mrg environment variable to &lsquo;<samp><span class="samp">C</span></samp>&rsquo; or &lsquo;<samp><span class="samp">En_US</span></samp>&rsquo;.
    757  1.1  mrg 
    758  1.1  mrg    <p>A default can be specified with the <samp><span class="option">-mcpu=</span><var>cpu_type</var></samp>
    759  1.1  mrg switch and using the configure option <samp><span class="option">--with-cpu-</span><var>cpu_type</var></samp>.
    760  1.1  mrg 
    761  1.5  mrg    <p><hr /><a name="iq2000_002dx_002delf"></a>
    762  1.1  mrg 
    763  1.5  mrg <h3 class="heading"><a name="TOC24"></a>iq2000-*-elf</h3>
    764  1.1  mrg 
    765  1.1  mrg <p>Vitesse IQ2000 processors.  These are used in embedded
    766  1.1  mrg applications.  There are no standard Unix configurations.
    767  1.1  mrg 
    768  1.5  mrg    <p><hr /><a name="lm32_002dx_002delf"></a>
    769  1.1  mrg 
    770  1.5  mrg <h3 class="heading"><a name="TOC25"></a>lm32-*-elf</h3>
    771  1.1  mrg 
    772  1.1  mrg <p>Lattice Mico32 processor. 
    773  1.1  mrg This configuration is intended for embedded systems.
    774  1.1  mrg 
    775  1.5  mrg    <p><hr /><a name="lm32_002dx_002duclinux"></a>
    776  1.1  mrg 
    777  1.5  mrg <h3 class="heading"><a name="TOC26"></a>lm32-*-uclinux</h3>
    778  1.1  mrg 
    779  1.1  mrg <p>Lattice Mico32 processor. 
    780  1.1  mrg This configuration is intended for embedded systems running uClinux.
    781  1.1  mrg 
    782  1.5  mrg    <p><hr /><a name="m32c_002dx_002delf"></a>
    783  1.1  mrg 
    784  1.5  mrg <h3 class="heading"><a name="TOC27"></a>m32c-*-elf</h3>
    785  1.1  mrg 
    786  1.1  mrg <p>Renesas M32C processor. 
    787  1.1  mrg This configuration is intended for embedded systems.
    788  1.1  mrg 
    789  1.5  mrg    <p><hr /><a name="m32r_002dx_002delf"></a>
    790  1.1  mrg 
    791  1.5  mrg <h3 class="heading"><a name="TOC28"></a>m32r-*-elf</h3>
    792  1.1  mrg 
    793  1.1  mrg <p>Renesas M32R processor. 
    794  1.1  mrg This configuration is intended for embedded systems.
    795  1.1  mrg 
    796  1.5  mrg    <p><hr /><a name="m68k_002dx_002dx"></a>
    797  1.1  mrg 
    798  1.5  mrg <h3 class="heading"><a name="TOC29"></a>m68k-*-*</h3>
    799  1.1  mrg 
    800  1.1  mrg <p>By default,
    801  1.1  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
    802  1.1  mrg &lsquo;<samp><span class="samp">m68k-*-linux</span></samp>&rsquo;
    803  1.1  mrg build libraries for both M680x0 and ColdFire processors.  If you only
    804  1.1  mrg need the M680x0 libraries, you can omit the ColdFire ones by passing
    805  1.1  mrg <samp><span class="option">--with-arch=m68k</span></samp> to <samp><span class="command">configure</span></samp>.  Alternatively, you
    806  1.1  mrg can omit the M680x0 libraries by passing <samp><span class="option">--with-arch=cf</span></samp> to
    807  1.1  mrg <samp><span class="command">configure</span></samp>.  These targets default to 5206 or 5475 code as
    808  1.1  mrg appropriate for the target system when
    809  1.1  mrg configured with <samp><span class="option">--with-arch=cf</span></samp> and 68020 code otherwise.
    810  1.1  mrg 
    811  1.1  mrg    <p>The &lsquo;<samp><span class="samp">m68k-*-netbsd</span></samp>&rsquo; and
    812  1.1  mrg &lsquo;<samp><span class="samp">m68k-*-openbsd</span></samp>&rsquo; targets also support the <samp><span class="option">--with-arch</span></samp>
    813  1.1  mrg option.  They will generate ColdFire CFV4e code when configured with
    814  1.1  mrg <samp><span class="option">--with-arch=cf</span></samp> and 68020 code otherwise.
    815  1.1  mrg 
    816  1.1  mrg    <p>You can override the default processors listed above by configuring
    817  1.1  mrg with <samp><span class="option">--with-cpu=</span><var>target</var></samp>.  This <var>target</var> can either
    818  1.1  mrg be a <samp><span class="option">-mcpu</span></samp> argument or one of the following values:
    819  1.1  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;,
    820  1.1  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;.
    821  1.1  mrg 
    822  1.3  mrg    <p>GCC requires at least binutils version 2.17 on these targets.
    823  1.3  mrg 
    824  1.5  mrg    <p><hr /><a name="m68k_002dx_002duclinux"></a>
    825  1.1  mrg 
    826  1.5  mrg <h3 class="heading"><a name="TOC30"></a>m68k-*-uclinux</h3>
    827  1.1  mrg 
    828  1.1  mrg <p>GCC 4.3 changed the uClinux configuration so that it uses the
    829  1.1  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. 
    830  1.1  mrg It also added improved support for C++ and flat shared libraries,
    831  1.3  mrg both of which were ABI changes.
    832  1.1  mrg 
    833  1.5  mrg    <p><hr /><a name="mep_002dx_002delf"></a>
    834  1.1  mrg 
    835  1.5  mrg <h3 class="heading"><a name="TOC31"></a>mep-*-elf</h3>
    836  1.1  mrg 
    837  1.1  mrg <p>Toshiba Media embedded Processor. 
    838  1.1  mrg This configuration is intended for embedded systems.
    839  1.1  mrg 
    840  1.5  mrg    <p><hr /><a name="microblaze_002dx_002delf"></a>
    841  1.1  mrg 
    842  1.5  mrg <h3 class="heading"><a name="TOC32"></a>microblaze-*-elf</h3>
    843  1.3  mrg 
    844  1.3  mrg <p>Xilinx MicroBlaze processor. 
    845  1.3  mrg This configuration is intended for embedded systems.
    846  1.3  mrg 
    847  1.5  mrg    <p><hr /><a name="mips_002dx_002dx"></a>
    848  1.3  mrg 
    849  1.5  mrg <h3 class="heading"><a name="TOC33"></a>mips-*-*</h3>
    850  1.1  mrg 
    851  1.1  mrg <p>If on a MIPS system you get an error message saying &ldquo;does not have gp
    852  1.1  mrg sections for all it's [sic] sectons [sic]&rdquo;, don't worry about it.  This
    853  1.1  mrg happens whenever you use GAS with the MIPS linker, but there is not
    854  1.1  mrg really anything wrong, and it is okay to use the output file.  You can
    855  1.1  mrg stop such warnings by installing the GNU linker.
    856  1.1  mrg 
    857  1.1  mrg    <p>It would be nice to extend GAS to produce the gp tables, but they are
    858  1.1  mrg optional, and there should not be a warning about their absence.
    859  1.1  mrg 
    860  1.1  mrg    <p>The libstdc++ atomic locking routines for MIPS targets requires MIPS II
    861  1.1  mrg and later.  A patch went in just after the GCC 3.3 release to
    862  1.1  mrg make &lsquo;<samp><span class="samp">mips*-*-*</span></samp>&rsquo; use the generic implementation instead.  You can also
    863  1.1  mrg configure for &lsquo;<samp><span class="samp">mipsel-elf</span></samp>&rsquo; as a workaround.  The
    864  1.1  mrg &lsquo;<samp><span class="samp">mips*-*-linux*</span></samp>&rsquo; target continues to use the MIPS II routines.  More
    865  1.1  mrg work on this is expected in future releases.
    866  1.1  mrg 
    867  1.1  mrg <!-- If you make -with-llsc the default for another target, please also -->
    868  1.1  mrg <!-- update the description of the -with-llsc option. -->
    869  1.1  mrg    <p>The built-in <code>__sync_*</code> functions are available on MIPS II and
    870  1.1  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
    871  1.1  mrg &lsquo;<samp><span class="samp">sync</span></samp>&rsquo; instructions.  This can be overridden by passing
    872  1.1  mrg <samp><span class="option">--with-llsc</span></samp> or <samp><span class="option">--without-llsc</span></samp> when configuring GCC. 
    873  1.1  mrg Since the Linux kernel emulates these instructions if they are
    874  1.1  mrg missing, the default for &lsquo;<samp><span class="samp">mips*-*-linux*</span></samp>&rsquo; targets is
    875  1.1  mrg <samp><span class="option">--with-llsc</span></samp>.  The <samp><span class="option">--with-llsc</span></samp> and
    876  1.1  mrg <samp><span class="option">--without-llsc</span></samp> configure options may be overridden at compile
    877  1.1  mrg time by passing the <samp><span class="option">-mllsc</span></samp> or <samp><span class="option">-mno-llsc</span></samp> options to
    878  1.1  mrg the compiler.
    879  1.1  mrg 
    880  1.1  mrg    <p>MIPS systems check for division by zero (unless
    881  1.1  mrg <samp><span class="option">-mno-check-zero-division</span></samp> is passed to the compiler) by
    882  1.1  mrg generating either a conditional trap or a break instruction.  Using
    883  1.1  mrg trap results in smaller code, but is only supported on MIPS II and
    884  1.1  mrg later.  Also, some versions of the Linux kernel have a bug that
    885  1.1  mrg prevents trap from generating the proper signal (<code>SIGFPE</code>).  To enable
    886  1.1  mrg the use of break, use the <samp><span class="option">--with-divide=breaks</span></samp>
    887  1.1  mrg <samp><span class="command">configure</span></samp> option when configuring GCC.  The default is to
    888  1.1  mrg use traps on systems that support them.
    889  1.1  mrg 
    890  1.1  mrg    <p>The assembler from GNU binutils 2.17 and earlier has a bug in the way
    891  1.1  mrg it sorts relocations for REL targets (o32, o64, EABI).  This can cause
    892  1.1  mrg bad code to be generated for simple C++ programs.  Also the linker
    893  1.1  mrg from GNU binutils versions prior to 2.17 has a bug which causes the
    894  1.1  mrg runtime linker stubs in very large programs, like <samp><span class="file">libgcj.so</span></samp>, to
    895  1.1  mrg be incorrectly generated.  GNU Binutils 2.18 and later (and snapshots
    896  1.1  mrg made after Nov. 9, 2006) should be free from both of these problems.
    897  1.1  mrg 
    898  1.5  mrg    <p><hr /><a name="mips_002dsgi_002dirix5"></a>
    899  1.1  mrg 
    900  1.5  mrg <h3 class="heading"><a name="TOC34"></a>mips-sgi-irix5</h3>
    901  1.1  mrg 
    902  1.3  mrg <p>Support for IRIX 5 has been removed in GCC 4.6.
    903  1.1  mrg 
    904  1.5  mrg    <p><hr /><a name="mips_002dsgi_002dirix6"></a>
    905  1.1  mrg 
    906  1.5  mrg <h3 class="heading"><a name="TOC35"></a>mips-sgi-irix6</h3>
    907  1.1  mrg 
    908  1.3  mrg <p>Support for IRIX 6.5 has been removed in GCC 4.8.  Support for IRIX 6
    909  1.3  mrg releases before 6.5 has been removed in GCC 4.6, as well as support for
    910  1.3  mrg the O32 ABI.
    911  1.1  mrg 
    912  1.5  mrg    <p><hr /><a name="moxie_002dx_002delf"></a>
    913  1.1  mrg 
    914  1.5  mrg <h3 class="heading"><a name="TOC36"></a>moxie-*-elf</h3>
    915  1.1  mrg 
    916  1.3  mrg <p>The moxie processor.
    917  1.1  mrg 
    918  1.5  mrg    <p><hr /><a name="msp430_002dx_002delf"></a>
    919  1.5  mrg 
    920  1.5  mrg <h3 class="heading"><a name="TOC37"></a>msp430-*-elf</h3>
    921  1.5  mrg 
    922  1.5  mrg <p>TI MSP430 processor. 
    923  1.5  mrg This configuration is intended for embedded systems.
    924  1.5  mrg 
    925  1.5  mrg    <p><hr /><a name="nds32le_002dx_002delf"></a>
    926  1.5  mrg 
    927  1.5  mrg <h3 class="heading"><a name="TOC38"></a>nds32le-*-elf</h3>
    928  1.5  mrg 
    929  1.5  mrg <p>Andes NDS32 target in little endian mode.
    930  1.5  mrg 
    931  1.5  mrg    <p><hr /><a name="nds32be_002dx_002delf"></a>
    932  1.5  mrg 
    933  1.5  mrg <h3 class="heading"><a name="TOC39"></a>nds32be-*-elf</h3>
    934  1.5  mrg 
    935  1.5  mrg <p>Andes NDS32 target in big endian mode.
    936  1.5  mrg 
    937  1.5  mrg    <p><hr /><a name="nvptx_002dx_002dnone"></a>
    938  1.5  mrg 
    939  1.5  mrg <h3 class="heading"><a name="TOC40"></a>nvptx-*-none</h3>
    940  1.5  mrg 
    941  1.5  mrg <p>Nvidia PTX target.
    942  1.5  mrg 
    943  1.5  mrg    <p>Instead of GNU binutils, you will need to install
    944  1.5  mrg <a href="https://github.com/MentorEmbedded/nvptx-tools/">nvptx-tools</a>. 
    945  1.5  mrg Tell GCC where to find it:
    946  1.5  mrg <samp><span class="option">--with-build-time-tools=[install-nvptx-tools]/nvptx-none/bin</span></samp>.
    947  1.5  mrg 
    948  1.5  mrg    <p>A nvptx port of newlib is available at
    949  1.5  mrg <a href="https://github.com/MentorEmbedded/nvptx-newlib/">nvptx-newlib</a>. 
    950  1.5  mrg It can be automatically built together with GCC.  For this, add a
    951  1.5  mrg symbolic link to nvptx-newlib's <samp><span class="file">newlib</span></samp> directory to the
    952  1.5  mrg directory containing the GCC sources.
    953  1.5  mrg 
    954  1.5  mrg    <p>Use the <samp><span class="option">--disable-sjlj-exceptions</span></samp> and
    955  1.5  mrg <samp><span class="option">--enable-newlib-io-long-long</span></samp> options when configuring.
    956  1.5  mrg 
    957  1.5  mrg    <p><hr /><a name="powerpc_002dx_002dx"></a>
    958  1.1  mrg 
    959  1.5  mrg <h3 class="heading"><a name="TOC41"></a>powerpc-*-*</h3>
    960  1.1  mrg 
    961  1.1  mrg <p>You can specify a default version for the <samp><span class="option">-mcpu=</span><var>cpu_type</var></samp>
    962  1.1  mrg switch by using the configure option <samp><span class="option">--with-cpu-</span><var>cpu_type</var></samp>.
    963  1.1  mrg 
    964  1.1  mrg    <p>You will need
    965  1.1  mrg <a href="ftp://ftp.kernel.org/pub/linux/devel/binutils">binutils 2.15</a>
    966  1.1  mrg or newer for a working GCC.
    967  1.1  mrg 
    968  1.5  mrg    <p><hr /><a name="powerpc_002dx_002ddarwin"></a>
    969  1.1  mrg 
    970  1.5  mrg <h3 class="heading"><a name="TOC42"></a>powerpc-*-darwin*</h3>
    971  1.1  mrg 
    972  1.1  mrg <p>PowerPC running Darwin (Mac OS X kernel).
    973  1.1  mrg 
    974  1.1  mrg    <p>Pre-installed versions of Mac OS X may not include any developer tools,
    975  1.1  mrg meaning that you will not be able to build GCC from source.  Tool
    976  1.1  mrg binaries are available at
    977  1.3  mrg <a href="http://opensource.apple.com/">http://opensource.apple.com/</a>.
    978  1.1  mrg 
    979  1.1  mrg    <p>This version of GCC requires at least cctools-590.36.  The
    980  1.1  mrg cctools-590.36 package referenced from
    981  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
    982  1.1  mrg on systems older than 10.3.9 (aka darwin7.9.0).
    983  1.1  mrg 
    984  1.5  mrg    <p><hr /><a name="powerpc_002dx_002delf"></a>
    985  1.1  mrg 
    986  1.5  mrg <h3 class="heading"><a name="TOC43"></a>powerpc-*-elf</h3>
    987  1.1  mrg 
    988  1.1  mrg <p>PowerPC system in big endian mode, running System V.4.
    989  1.1  mrg 
    990  1.5  mrg    <p><hr /><a name="powerpc_002dx_002dlinux_002dgnu"></a>
    991  1.1  mrg 
    992  1.5  mrg <h3 class="heading"><a name="TOC44"></a>powerpc*-*-linux-gnu*</h3>
    993  1.1  mrg 
    994  1.1  mrg <p>PowerPC system in big endian mode running Linux.
    995  1.1  mrg 
    996  1.5  mrg    <p><hr /><a name="powerpc_002dx_002dnetbsd"></a>
    997  1.1  mrg 
    998  1.5  mrg <h3 class="heading"><a name="TOC45"></a>powerpc-*-netbsd*</h3>
    999  1.1  mrg 
   1000  1.1  mrg <p>PowerPC system in big endian mode running NetBSD.
   1001  1.1  mrg 
   1002  1.5  mrg    <p><hr /><a name="powerpc_002dx_002deabisim"></a>
   1003  1.1  mrg 
   1004  1.5  mrg <h3 class="heading"><a name="TOC46"></a>powerpc-*-eabisim</h3>
   1005  1.1  mrg 
   1006  1.1  mrg <p>Embedded PowerPC system in big endian mode for use in running under the
   1007  1.1  mrg PSIM simulator.
   1008  1.1  mrg 
   1009  1.5  mrg    <p><hr /><a name="powerpc_002dx_002deabi"></a>
   1010  1.1  mrg 
   1011  1.5  mrg <h3 class="heading"><a name="TOC47"></a>powerpc-*-eabi</h3>
   1012  1.1  mrg 
   1013  1.1  mrg <p>Embedded PowerPC system in big endian mode.
   1014  1.1  mrg 
   1015  1.5  mrg    <p><hr /><a name="powerpcle_002dx_002delf"></a>
   1016  1.1  mrg 
   1017  1.5  mrg <h3 class="heading"><a name="TOC48"></a>powerpcle-*-elf</h3>
   1018  1.1  mrg 
   1019  1.1  mrg <p>PowerPC system in little endian mode, running System V.4.
   1020  1.1  mrg 
   1021  1.5  mrg    <p><hr /><a name="powerpcle_002dx_002deabisim"></a>
   1022  1.1  mrg 
   1023  1.5  mrg <h3 class="heading"><a name="TOC49"></a>powerpcle-*-eabisim</h3>
   1024  1.1  mrg 
   1025  1.1  mrg <p>Embedded PowerPC system in little endian mode for use in running under
   1026  1.1  mrg the PSIM simulator.
   1027  1.1  mrg 
   1028  1.5  mrg    <p><hr /><a name="powerpcle_002dx_002deabi"></a>
   1029  1.1  mrg 
   1030  1.5  mrg <h3 class="heading"><a name="TOC50"></a>powerpcle-*-eabi</h3>
   1031  1.1  mrg 
   1032  1.1  mrg <p>Embedded PowerPC system in little endian mode.
   1033  1.1  mrg 
   1034  1.5  mrg    <p><hr /><a name="rl78_002dx_002delf"></a>
   1035  1.1  mrg 
   1036  1.5  mrg <h3 class="heading"><a name="TOC51"></a>rl78-*-elf</h3>
   1037  1.3  mrg 
   1038  1.3  mrg <p>The Renesas RL78 processor. 
   1039  1.3  mrg This configuration is intended for embedded systems.
   1040  1.3  mrg 
   1041  1.5  mrg    <p><hr /><a name="rx_002dx_002delf"></a>
   1042  1.3  mrg 
   1043  1.5  mrg <h3 class="heading"><a name="TOC52"></a>rx-*-elf</h3>
   1044  1.1  mrg 
   1045  1.1  mrg <p>The Renesas RX processor.  See
   1046  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>
   1047  1.1  mrg for more information about this processor.
   1048  1.1  mrg 
   1049  1.5  mrg    <p><hr /><a name="s390_002dx_002dlinux"></a>
   1050  1.1  mrg 
   1051  1.5  mrg <h3 class="heading"><a name="TOC53"></a>s390-*-linux*</h3>
   1052  1.1  mrg 
   1053  1.1  mrg <p>S/390 system running GNU/Linux for S/390.
   1054  1.1  mrg 
   1055  1.5  mrg    <p><hr /><a name="s390x_002dx_002dlinux"></a>
   1056  1.1  mrg 
   1057  1.5  mrg <h3 class="heading"><a name="TOC54"></a>s390x-*-linux*</h3>
   1058  1.1  mrg 
   1059  1.1  mrg <p>zSeries system (64-bit) running GNU/Linux for zSeries.
   1060  1.1  mrg 
   1061  1.5  mrg    <p><hr /><a name="s390x_002dibm_002dtpf"></a>
   1062  1.1  mrg 
   1063  1.5  mrg <h3 class="heading"><a name="TOC55"></a>s390x-ibm-tpf*</h3>
   1064  1.1  mrg 
   1065  1.1  mrg <p>zSeries system (64-bit) running TPF.  This platform is
   1066  1.1  mrg supported as cross-compilation target only.
   1067  1.1  mrg 
   1068  1.1  mrg    <p><hr /><!-- Please use Solaris 2 to refer to all release of Solaris, starting -->
   1069  1.1  mrg <!-- with 2.0 until 2.6, 7, 8, etc.  Solaris 1 was a marketing name for -->
   1070  1.1  mrg <!-- SunOS 4 releases which we don't use to avoid confusion.  Solaris -->
   1071  1.1  mrg <!-- alone is too unspecific and must be avoided. -->
   1072  1.5  mrg <a name="x_002dx_002dsolaris2"></a>
   1073  1.1  mrg 
   1074  1.5  mrg <h3 class="heading"><a name="TOC56"></a>*-*-solaris2*</h3>
   1075  1.3  mrg 
   1076  1.5  mrg <p>Support for Solaris 9 has been removed in GCC 4.10.  Support for Solaris
   1077  1.5  mrg 8 has been removed in GCC 4.8.  Support for Solaris 7 has been removed
   1078  1.5  mrg in GCC 4.6.
   1079  1.1  mrg 
   1080  1.3  mrg    <p>Sun does not ship a C compiler with Solaris 2 before Solaris 10, though
   1081  1.3  mrg you can download the Sun Studio compilers for free.  In Solaris 10 and
   1082  1.3  mrg 11, GCC 3.4.3 is available as <samp><span class="command">/usr/sfw/bin/gcc</span></samp>.  Solaris 11
   1083  1.3  mrg also provides GCC 4.5.2 as <samp><span class="command">/usr/gcc/4.5/bin/gcc</span></samp>.  Alternatively,
   1084  1.1  mrg you can install a pre-built GCC to bootstrap and install GCC.  See the
   1085  1.1  mrg <a href="binaries.html">binaries page</a> for details.
   1086  1.1  mrg 
   1087  1.1  mrg    <p>The Solaris 2 <samp><span class="command">/bin/sh</span></samp> will often fail to configure
   1088  1.1  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
   1089  1.1  mrg recommend using the following initial sequence of commands
   1090  1.1  mrg 
   1091  1.3  mrg <pre class="smallexample">     % CONFIG_SHELL=/bin/ksh
   1092  1.3  mrg      % export CONFIG_SHELL
   1093  1.1  mrg </pre>
   1094  1.1  mrg    <p class="noindent">and proceed as described in <a href="configure.html">the configure instructions</a>. 
   1095  1.1  mrg In addition we strongly recommend specifying an absolute path to invoke
   1096  1.1  mrg <samp><var>srcdir</var><span class="command">/configure</span></samp>.
   1097  1.1  mrg 
   1098  1.1  mrg    <p>Solaris 2 comes with a number of optional OS packages.  Some of these
   1099  1.1  mrg are needed to use GCC fully, namely <code>SUNWarc</code>,
   1100  1.1  mrg <code>SUNWbtool</code>, <code>SUNWesu</code>, <code>SUNWhea</code>, <code>SUNWlibm</code>,
   1101  1.1  mrg <code>SUNWsprot</code>, and <code>SUNWtoo</code>.  If you did not install all
   1102  1.1  mrg optional packages when installing Solaris 2, you will need to verify that
   1103  1.1  mrg the packages that GCC needs are installed.
   1104  1.1  mrg 
   1105  1.1  mrg    <p>To check whether an optional package is installed, use
   1106  1.1  mrg the <samp><span class="command">pkginfo</span></samp> command.  To add an optional package, use the
   1107  1.1  mrg <samp><span class="command">pkgadd</span></samp> command.  For further details, see the Solaris 2
   1108  1.1  mrg documentation.
   1109  1.1  mrg 
   1110  1.1  mrg    <p>Trying to use the linker and other tools in
   1111  1.1  mrg <samp><span class="file">/usr/ucb</span></samp> to install GCC has been observed to cause trouble. 
   1112  1.1  mrg For example, the linker may hang indefinitely.  The fix is to remove
   1113  1.1  mrg <samp><span class="file">/usr/ucb</span></samp> from your <samp><span class="env">PATH</span></samp>.
   1114  1.1  mrg 
   1115  1.1  mrg    <p>The build process works more smoothly with the legacy Sun tools so, if you
   1116  1.1  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
   1117  1.1  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.
   1118  1.1  mrg 
   1119  1.1  mrg    <p>We recommend the use of the Sun assembler or the GNU assembler, in
   1120  1.1  mrg conjunction with the Sun linker.  The GNU <samp><span class="command">as</span></samp>
   1121  1.1  mrg versions included in Solaris 10, from GNU binutils 2.15, and Solaris 11,
   1122  1.1  mrg from GNU binutils 2.19, are known to work.  They can be found in
   1123  1.3  mrg <samp><span class="file">/usr/sfw/bin/gas</span></samp>.  Current versions of GNU binutils (2.22)
   1124  1.1  mrg are known to work as well.  Note that your mileage may vary
   1125  1.1  mrg if you use a combination of the GNU tools and the Sun tools: while the
   1126  1.1  mrg combination GNU <samp><span class="command">as</span></samp> + Sun <samp><span class="command">ld</span></samp> should reasonably work,
   1127  1.3  mrg the reverse combination Sun <samp><span class="command">as</span></samp> + GNU <samp><span class="command">ld</span></samp> may fail to
   1128  1.3  mrg build or cause memory corruption at runtime in some cases for C++ programs. 
   1129  1.1  mrg <!-- FIXME: still? -->
   1130  1.1  mrg GNU <samp><span class="command">ld</span></samp> usually works as well, although the version included in
   1131  1.1  mrg Solaris 10 cannot be used due to several bugs.  Again, the current
   1132  1.3  mrg version (2.22) is known to work, but generally lacks platform specific
   1133  1.3  mrg features, so better stay with Sun <samp><span class="command">ld</span></samp>.  To use the LTO linker
   1134  1.3  mrg plugin (<samp><span class="option">-fuse-linker-plugin</span></samp>) with GNU <samp><span class="command">ld</span></samp>, GNU
   1135  1.3  mrg binutils <em>must</em> be configured with <samp><span class="option">--enable-largefile</span></samp>.
   1136  1.3  mrg 
   1137  1.3  mrg    <p>To enable symbol versioning in &lsquo;<samp><span class="samp">libstdc++</span></samp>&rsquo; with Sun <samp><span class="command">ld</span></samp>,
   1138  1.3  mrg you need to have any version of GNU <samp><span class="command">c++filt</span></samp>, which is part of
   1139  1.3  mrg GNU binutils.  &lsquo;<samp><span class="samp">libstdc++</span></samp>&rsquo; symbol versioning will be disabled if no
   1140  1.3  mrg appropriate version is found.  Sun <samp><span class="command">c++filt</span></samp> from the Sun Studio
   1141  1.3  mrg compilers does <em>not</em> work.
   1142  1.1  mrg 
   1143  1.1  mrg    <p>Sun bug 4296832 turns up when compiling X11 headers with GCC 2.95 or
   1144  1.1  mrg newer: <samp><span class="command">g++</span></samp> will complain that types are missing.  These headers
   1145  1.1  mrg assume that omitting the type means <code>int</code>; this assumption worked for
   1146  1.1  mrg C90 but is wrong for C++, and is now wrong for C99 also.
   1147  1.1  mrg 
   1148  1.1  mrg    <p>Sun bug 4927647 sometimes causes random spurious testsuite failures
   1149  1.1  mrg related to missing diagnostic output.  This bug doesn't affect GCC
   1150  1.1  mrg itself, rather it is a kernel bug triggered by the <samp><span class="command">expect</span></samp>
   1151  1.1  mrg program which is used only by the GCC testsuite driver.  When the bug
   1152  1.1  mrg causes the <samp><span class="command">expect</span></samp> program to miss anticipated output, extra
   1153  1.1  mrg testsuite failures appear.
   1154  1.1  mrg 
   1155  1.5  mrg    <p><hr /><a name="sparc_002dx_002dx"></a>
   1156  1.3  mrg 
   1157  1.5  mrg <h3 class="heading"><a name="TOC57"></a>sparc*-*-*</h3>
   1158  1.3  mrg 
   1159  1.3  mrg <p>This section contains general configuration information for all
   1160  1.3  mrg SPARC-based platforms.  In addition to reading this section, please
   1161  1.3  mrg read all other sections that match your target.
   1162  1.3  mrg 
   1163  1.3  mrg    <p>Newer versions of the GNU Multiple Precision Library (GMP), the MPFR
   1164  1.3  mrg library and the MPC library are known to be miscompiled by earlier
   1165  1.3  mrg versions of GCC on these platforms.  We therefore recommend the use
   1166  1.3  mrg of the exact versions of these libraries listed as minimal versions
   1167  1.3  mrg in <a href="prerequisites.html">the prerequisites</a>.
   1168  1.3  mrg 
   1169  1.5  mrg    <p><hr /><a name="sparc_002dsun_002dsolaris2"></a>
   1170  1.1  mrg 
   1171  1.5  mrg <h3 class="heading"><a name="TOC58"></a>sparc-sun-solaris2*</h3>
   1172  1.1  mrg 
   1173  1.1  mrg <p>When GCC is configured to use GNU binutils 2.14 or later, the binaries
   1174  1.1  mrg produced are smaller than the ones produced using Sun's native tools;
   1175  1.1  mrg this difference is quite significant for binaries containing debugging
   1176  1.1  mrg information.
   1177  1.1  mrg 
   1178  1.1  mrg    <p>Starting with Solaris 7, the operating system is capable of executing
   1179  1.1  mrg 64-bit SPARC V9 binaries.  GCC 3.1 and later properly supports
   1180  1.1  mrg this; the <samp><span class="option">-m64</span></samp> option enables 64-bit code generation. 
   1181  1.1  mrg However, if all you want is code tuned for the UltraSPARC CPU, you
   1182  1.1  mrg should try the <samp><span class="option">-mtune=ultrasparc</span></samp> option instead, which produces
   1183  1.1  mrg code that, unlike full 64-bit code, can still run on non-UltraSPARC
   1184  1.1  mrg machines.
   1185  1.1  mrg 
   1186  1.1  mrg    <p>When configuring on a Solaris 7 or later system that is running a kernel
   1187  1.1  mrg that supports only 32-bit binaries, one must configure with
   1188  1.1  mrg <samp><span class="option">--disable-multilib</span></samp>, since we will not be able to build the
   1189  1.1  mrg 64-bit target libraries.
   1190  1.1  mrg 
   1191  1.1  mrg    <p>GCC 3.3 and GCC 3.4 trigger code generation bugs in earlier versions of
   1192  1.1  mrg the GNU compiler (especially GCC 3.0.x versions), which lead to the
   1193  1.1  mrg miscompilation of the stage1 compiler and the subsequent failure of the
   1194  1.1  mrg bootstrap process.  A workaround is to use GCC 3.2.3 as an intermediary
   1195  1.1  mrg stage, i.e. to bootstrap that compiler with the base compiler and then
   1196  1.1  mrg use it to bootstrap the final compiler.
   1197  1.1  mrg 
   1198  1.1  mrg    <p>GCC 3.4 triggers a code generation bug in versions 5.4 (Sun ONE Studio 7)
   1199  1.1  mrg and 5.5 (Sun ONE Studio 8) of the Sun compiler, which causes a bootstrap
   1200  1.1  mrg failure in form of a miscompilation of the stage1 compiler by the Sun
   1201  1.1  mrg compiler.  This is Sun bug 4974440.  This is fixed with patch 112760-07.
   1202  1.1  mrg 
   1203  1.1  mrg    <p>GCC 3.4 changed the default debugging format from Stabs to DWARF-2 for
   1204  1.1  mrg 32-bit code on Solaris 7 and later.  If you use the Sun assembler, this
   1205  1.1  mrg change apparently runs afoul of Sun bug 4910101 (which is referenced as
   1206  1.1  mrg an x86-only problem by Sun, probably because they do not use DWARF-2). 
   1207  1.1  mrg A symptom of the problem is that you cannot compile C++ programs like
   1208  1.1  mrg <samp><span class="command">groff</span></samp> 1.19.1 without getting messages similar to the following:
   1209  1.1  mrg 
   1210  1.1  mrg <pre class="smallexample">     ld: warning: relocation error: R_SPARC_UA32: ...
   1211  1.1  mrg        external symbolic relocation against non-allocatable section
   1212  1.1  mrg        .debug_info cannot be processed at runtime: relocation ignored.
   1213  1.1  mrg </pre>
   1214  1.1  mrg    <p class="noindent">To work around this problem, compile with <samp><span class="option">-gstabs+</span></samp> instead of
   1215  1.1  mrg plain <samp><span class="option">-g</span></samp>.
   1216  1.1  mrg 
   1217  1.3  mrg    <p>When configuring the GNU Multiple Precision Library (GMP), the MPFR
   1218  1.3  mrg library or the MPC library on a Solaris 7 or later system, the canonical
   1219  1.3  mrg target triplet must be specified as the <samp><span class="command">build</span></samp> parameter on the
   1220  1.3  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
   1221  1.3  mrg not that of GMP or MPFR or MPC).  For example on a Solaris 9 system:
   1222  1.1  mrg 
   1223  1.3  mrg <pre class="smallexample">     % ./configure --build=sparc-sun-solaris2.9 --prefix=xxx
   1224  1.1  mrg </pre>
   1225  1.5  mrg    <p><hr /><a name="sparc_002dsun_002dsolaris210"></a>
   1226  1.1  mrg 
   1227  1.5  mrg <h3 class="heading"><a name="TOC59"></a>sparc-sun-solaris2.10</h3>
   1228  1.1  mrg 
   1229  1.1  mrg <p>There is a bug in older versions of the Sun assembler which breaks
   1230  1.1  mrg thread-local storage (TLS).  A typical error message is
   1231  1.1  mrg 
   1232  1.1  mrg <pre class="smallexample">     ld: fatal: relocation error: R_SPARC_TLS_LE_HIX22: file /var/tmp//ccamPA1v.o:
   1233  1.1  mrg        symbol &lt;unknown&gt;: bad symbol type SECT: symbol type must be TLS
   1234  1.1  mrg </pre>
   1235  1.1  mrg    <p class="noindent">This bug is fixed in Sun patch 118683-03 or later.
   1236  1.1  mrg 
   1237  1.5  mrg    <p><hr /><a name="sparc_002dx_002dlinux"></a>
   1238  1.1  mrg 
   1239  1.5  mrg <h3 class="heading"><a name="TOC60"></a>sparc-*-linux*</h3>
   1240  1.1  mrg 
   1241  1.1  mrg <p>GCC versions 3.0 and higher require binutils 2.11.2 and glibc 2.2.4
   1242  1.1  mrg or newer on this platform.  All earlier binutils and glibc
   1243  1.1  mrg releases mishandled unaligned relocations on <code>sparc-*-*</code> targets.
   1244  1.1  mrg 
   1245  1.5  mrg    <p><hr /><a name="sparc64_002dx_002dsolaris2"></a>
   1246  1.1  mrg 
   1247  1.5  mrg <h3 class="heading"><a name="TOC61"></a>sparc64-*-solaris2*</h3>
   1248  1.1  mrg 
   1249  1.3  mrg <p>When configuring the GNU Multiple Precision Library (GMP), the MPFR
   1250  1.3  mrg library or the MPC library, the canonical target triplet must be specified
   1251  1.3  mrg as the <samp><span class="command">build</span></samp> parameter on the configure line.  For example
   1252  1.3  mrg on a Solaris 9 system:
   1253  1.1  mrg 
   1254  1.3  mrg <pre class="smallexample">     % ./configure --build=sparc64-sun-solaris2.9 --prefix=xxx
   1255  1.1  mrg </pre>
   1256  1.1  mrg    <p>The following compiler flags must be specified in the configure
   1257  1.1  mrg step in order to bootstrap this target with the Sun compiler:
   1258  1.1  mrg 
   1259  1.3  mrg <pre class="smallexample">     % CC="cc -xarch=v9 -xildoff" <var>srcdir</var>/configure [<var>options</var>] [<var>target</var>]
   1260  1.1  mrg </pre>
   1261  1.1  mrg    <p class="noindent"><samp><span class="option">-xarch=v9</span></samp> specifies the SPARC-V9 architecture to the Sun toolchain
   1262  1.1  mrg and <samp><span class="option">-xildoff</span></samp> turns off the incremental linker.
   1263  1.1  mrg 
   1264  1.5  mrg    <p><hr /><a name="sparcv9_002dx_002dsolaris2"></a>
   1265  1.1  mrg 
   1266  1.5  mrg <h3 class="heading"><a name="TOC62"></a>sparcv9-*-solaris2*</h3>
   1267  1.1  mrg 
   1268  1.1  mrg <p>This is a synonym for &lsquo;<samp><span class="samp">sparc64-*-solaris2*</span></samp>&rsquo;.
   1269  1.1  mrg 
   1270  1.5  mrg    <p><hr /><a name="c6x_002dx_002dx"></a>
   1271  1.1  mrg 
   1272  1.5  mrg <h3 class="heading"><a name="TOC63"></a>c6x-*-*</h3>
   1273  1.3  mrg 
   1274  1.3  mrg <p>The C6X family of processors. This port requires binutils-2.22 or newer.
   1275  1.3  mrg 
   1276  1.5  mrg    <p><hr /><a name="tilegx_002d_002a_002dlinux"></a>
   1277  1.5  mrg 
   1278  1.5  mrg <h3 class="heading"><a name="TOC64"></a>tilegx-*-linux*</h3>
   1279  1.5  mrg 
   1280  1.5  mrg <p>The TILE-Gx processor in little endian mode, running GNU/Linux.  This
   1281  1.5  mrg port requires binutils-2.22 or newer.
   1282  1.5  mrg 
   1283  1.5  mrg    <p><hr /><a name="tilegxbe_002d_002a_002dlinux"></a>
   1284  1.3  mrg 
   1285  1.5  mrg <h3 class="heading"><a name="TOC65"></a>tilegxbe-*-linux*</h3>
   1286  1.3  mrg 
   1287  1.5  mrg <p>The TILE-Gx processor in big endian mode, running GNU/Linux.  This
   1288  1.5  mrg port requires binutils-2.23 or newer.
   1289  1.3  mrg 
   1290  1.5  mrg    <p><hr /><a name="tilepro_002d_002a_002dlinux"></a>
   1291  1.3  mrg 
   1292  1.5  mrg <h3 class="heading"><a name="TOC66"></a>tilepro-*-linux*</h3>
   1293  1.3  mrg 
   1294  1.3  mrg <p>The TILEPro processor running GNU/Linux.  This port requires
   1295  1.3  mrg binutils-2.22 or newer.
   1296  1.3  mrg 
   1297  1.5  mrg    <p><hr /><a name="visium_002dx_002delf"></a>
   1298  1.5  mrg 
   1299  1.5  mrg <h3 class="heading"><a name="TOC67"></a>visium-*-elf</h3>
   1300  1.5  mrg 
   1301  1.5  mrg <p>CDS VISIUMcore processor. 
   1302  1.5  mrg This configuration is intended for embedded systems.
   1303  1.5  mrg 
   1304  1.5  mrg    <p><hr /><a name="x_002dx_002dvxworks"></a>
   1305  1.3  mrg 
   1306  1.5  mrg <h3 class="heading"><a name="TOC68"></a>*-*-vxworks*</h3>
   1307  1.1  mrg 
   1308  1.1  mrg <p>Support for VxWorks is in flux.  At present GCC supports <em>only</em> the
   1309  1.1  mrg very recent VxWorks 5.5 (aka Tornado 2.2) release, and only on PowerPC. 
   1310  1.1  mrg We welcome patches for other architectures supported by VxWorks 5.5. 
   1311  1.1  mrg Support for VxWorks AE would also be welcome; we believe this is merely
   1312  1.1  mrg a matter of writing an appropriate &ldquo;configlette&rdquo; (see below).  We are
   1313  1.1  mrg not interested in supporting older, a.out or COFF-based, versions of
   1314  1.1  mrg VxWorks in GCC 3.
   1315  1.1  mrg 
   1316  1.1  mrg    <p>VxWorks comes with an older version of GCC installed in
   1317  1.1  mrg <samp><var>$WIND_BASE</var><span class="file">/host</span></samp>; we recommend you do not overwrite it. 
   1318  1.1  mrg Choose an installation <var>prefix</var> entirely outside <var>$WIND_BASE</var>. 
   1319  1.1  mrg Before running <samp><span class="command">configure</span></samp>, create the directories <samp><var>prefix</var></samp>
   1320  1.1  mrg and <samp><var>prefix</var><span class="file">/bin</span></samp>.  Link or copy the appropriate assembler,
   1321  1.1  mrg linker, etc. into <samp><var>prefix</var><span class="file">/bin</span></samp>, and set your <var>PATH</var> to
   1322  1.1  mrg include that directory while running both <samp><span class="command">configure</span></samp> and
   1323  1.1  mrg <samp><span class="command">make</span></samp>.
   1324  1.1  mrg 
   1325  1.1  mrg    <p>You must give <samp><span class="command">configure</span></samp> the
   1326  1.1  mrg <samp><span class="option">--with-headers=</span><var>$WIND_BASE</var><span class="option">/target/h</span></samp> switch so that it can
   1327  1.1  mrg find the VxWorks system headers.  Since VxWorks is a cross compilation
   1328  1.1  mrg target only, you must also specify <samp><span class="option">--target=</span><var>target</var></samp>. 
   1329  1.1  mrg <samp><span class="command">configure</span></samp> will attempt to create the directory
   1330  1.1  mrg <samp><var>prefix</var><span class="file">/</span><var>target</var><span class="file">/sys-include</span></samp> and copy files into it;
   1331  1.1  mrg make sure the user running <samp><span class="command">configure</span></samp> has sufficient privilege
   1332  1.1  mrg to do so.
   1333  1.1  mrg 
   1334  1.1  mrg    <p>GCC's exception handling runtime requires a special &ldquo;configlette&rdquo;
   1335  1.1  mrg module, <samp><span class="file">contrib/gthr_supp_vxw_5x.c</span></samp>.  Follow the instructions in
   1336  1.1  mrg that file to add the module to your kernel build.  (Future versions of
   1337  1.1  mrg VxWorks will incorporate this module.)
   1338  1.1  mrg 
   1339  1.5  mrg    <p><hr /><a name="x86_002d64_002dx_002dx"></a>
   1340  1.1  mrg 
   1341  1.5  mrg <h3 class="heading"><a name="TOC69"></a>x86_64-*-*, amd64-*-*</h3>
   1342  1.1  mrg 
   1343  1.1  mrg <p>GCC supports the x86-64 architecture implemented by the AMD64 processor
   1344  1.1  mrg (amd64-*-* is an alias for x86_64-*-*) on GNU/Linux, FreeBSD and NetBSD. 
   1345  1.1  mrg On GNU/Linux the default is a bi-arch compiler which is able to generate
   1346  1.1  mrg both 64-bit x86-64 and 32-bit x86 code (via the <samp><span class="option">-m32</span></samp> switch).
   1347  1.1  mrg 
   1348  1.5  mrg    <p><hr /><a name="x86_002d64_002dx_002dsolaris210"></a>
   1349  1.1  mrg 
   1350  1.5  mrg <h3 class="heading"><a name="TOC70"></a>x86_64-*-solaris2.1[0-9]*</h3>
   1351  1.3  mrg 
   1352  1.3  mrg <p>GCC also supports the x86-64 architecture implemented by the AMD64
   1353  1.3  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
   1354  1.3  mrg Solaris 10 or later.  Unlike other systems, without special options a
   1355  1.3  mrg bi-arch compiler is built which generates 32-bit code by default, but
   1356  1.3  mrg can generate 64-bit x86-64 code with the <samp><span class="option">-m64</span></samp> switch.  Since
   1357  1.3  mrg GCC 4.7, there is also configuration that defaults to 64-bit code, but
   1358  1.3  mrg can generate 32-bit code with <samp><span class="option">-m32</span></samp>.  To configure and build
   1359  1.3  mrg this way, you have to provide all support libraries like <samp><span class="file">libgmp</span></samp>
   1360  1.3  mrg as 64-bit code, configure with <samp><span class="option">--target=x86_64-pc-solaris2.1x</span></samp>
   1361  1.3  mrg and &lsquo;<samp><span class="samp">CC=gcc -m64</span></samp>&rsquo;.
   1362  1.3  mrg 
   1363  1.5  mrg    <p><hr /><a name="xtensa_002dx_002delf"></a>
   1364  1.3  mrg 
   1365  1.5  mrg <h3 class="heading"><a name="TOC71"></a>xtensa*-*-elf</h3>
   1366  1.1  mrg 
   1367  1.1  mrg <p>This target is intended for embedded Xtensa systems using the
   1368  1.1  mrg &lsquo;<samp><span class="samp">newlib</span></samp>&rsquo; C library.  It uses ELF but does not support shared
   1369  1.1  mrg objects.  Designed-defined instructions specified via the
   1370  1.1  mrg Tensilica Instruction Extension (TIE) language are only supported
   1371  1.1  mrg through inline assembly.
   1372  1.1  mrg 
   1373  1.1  mrg    <p>The Xtensa configuration information must be specified prior to
   1374  1.1  mrg building GCC.  The <samp><span class="file">include/xtensa-config.h</span></samp> header
   1375  1.1  mrg file contains the configuration information.  If you created your
   1376  1.1  mrg own Xtensa configuration with the Xtensa Processor Generator, the
   1377  1.1  mrg downloaded files include a customized copy of this header file,
   1378  1.1  mrg which you can use to replace the default header file.
   1379  1.1  mrg 
   1380  1.5  mrg    <p><hr /><a name="xtensa_002dx_002dlinux"></a>
   1381  1.1  mrg 
   1382  1.5  mrg <h3 class="heading"><a name="TOC72"></a>xtensa*-*-linux*</h3>
   1383  1.1  mrg 
   1384  1.1  mrg <p>This target is for Xtensa systems running GNU/Linux.  It supports ELF
   1385  1.1  mrg shared objects and the GNU C library (glibc).  It also generates
   1386  1.1  mrg position-independent code (PIC) regardless of whether the
   1387  1.1  mrg <samp><span class="option">-fpic</span></samp> or <samp><span class="option">-fPIC</span></samp> options are used.  In other
   1388  1.1  mrg respects, this target is the same as the
   1389  1.1  mrg <a href="#xtensa*-*-elf">&lsquo;<samp><span class="samp">xtensa*-*-elf</span></samp>&rsquo;</a> target.
   1390  1.1  mrg 
   1391  1.5  mrg    <p><hr /><a name="windows"></a>
   1392  1.1  mrg 
   1393  1.5  mrg <h3 class="heading"><a name="TOC73"></a>Microsoft Windows</h3>
   1394  1.1  mrg 
   1395  1.5  mrg <h4 class="subheading"><a name="TOC74"></a>Intel 16-bit versions</h4>
   1396  1.1  mrg 
   1397  1.1  mrg <p>The 16-bit versions of Microsoft Windows, such as Windows 3.1, are not
   1398  1.1  mrg supported.
   1399  1.1  mrg 
   1400  1.1  mrg    <p>However, the 32-bit port has limited support for Microsoft
   1401  1.1  mrg Windows 3.11 in the Win32s environment, as a target only.  See below.
   1402  1.1  mrg 
   1403  1.5  mrg <h4 class="subheading"><a name="TOC75"></a>Intel 32-bit versions</h4>
   1404  1.1  mrg 
   1405  1.1  mrg <p>The 32-bit versions of Windows, including Windows 95, Windows NT, Windows
   1406  1.1  mrg XP, and Windows Vista, are supported by several different target
   1407  1.1  mrg platforms.  These targets differ in which Windows subsystem they target
   1408  1.1  mrg and which C libraries are used.
   1409  1.1  mrg 
   1410  1.1  mrg      <ul>
   1411  1.1  mrg <li>Cygwin <a href="#x-x-cygwin">*-*-cygwin</a>: Cygwin provides a user-space
   1412  1.1  mrg Linux API emulation layer in the Win32 subsystem. 
   1413  1.1  mrg <li>Interix <a href="#x-x-interix">*-*-interix</a>: The Interix subsystem
   1414  1.1  mrg provides native support for POSIX. 
   1415  1.1  mrg <li>MinGW <a href="#x-x-mingw32">*-*-mingw32</a>: MinGW is a native GCC port for
   1416  1.1  mrg the Win32 subsystem that provides a subset of POSIX. 
   1417  1.1  mrg <li>MKS i386-pc-mks: NuTCracker from MKS.  See
   1418  1.1  mrg <a href="http://www.mkssoftware.com/">http://www.mkssoftware.com/</a> for more information. 
   1419  1.1  mrg </ul>
   1420  1.1  mrg 
   1421  1.5  mrg <h4 class="subheading"><a name="TOC76"></a>Intel 64-bit versions</h4>
   1422  1.1  mrg 
   1423  1.1  mrg <p>GCC contains support for x86-64 using the mingw-w64
   1424  1.1  mrg runtime library, available from <a href="http://mingw-w64.sourceforge.net/">http://mingw-w64.sourceforge.net/</a>. 
   1425  1.1  mrg This library should be used with the target triple x86_64-pc-mingw32.
   1426  1.1  mrg 
   1427  1.1  mrg    <p>Presently Windows for Itanium is not supported.
   1428  1.1  mrg 
   1429  1.5  mrg <h4 class="subheading"><a name="TOC77"></a>Windows CE</h4>
   1430  1.1  mrg 
   1431  1.3  mrg <p>Windows CE is supported as a target only on Hitachi
   1432  1.1  mrg SuperH (sh-wince-pe), and MIPS (mips-wince-pe).
   1433  1.1  mrg 
   1434  1.5  mrg <h4 class="subheading"><a name="TOC78"></a>Other Windows Platforms</h4>
   1435  1.1  mrg 
   1436  1.1  mrg <p>GCC no longer supports Windows NT on the Alpha or PowerPC.
   1437  1.1  mrg 
   1438  1.1  mrg    <p>GCC no longer supports the Windows POSIX subsystem.  However, it does
   1439  1.1  mrg support the Interix subsystem.  See above.
   1440  1.1  mrg 
   1441  1.1  mrg    <p>Old target names including *-*-winnt and *-*-windowsnt are no longer used.
   1442  1.1  mrg 
   1443  1.1  mrg    <p>PW32 (i386-pc-pw32) support was never completed, and the project seems to
   1444  1.1  mrg be inactive.  See <a href="http://pw32.sourceforge.net/">http://pw32.sourceforge.net/</a> for more information.
   1445  1.1  mrg 
   1446  1.1  mrg    <p>UWIN support has been removed due to a lack of maintenance.
   1447  1.1  mrg 
   1448  1.5  mrg    <p><hr /><a name="x_002dx_002dcygwin"></a>
   1449  1.1  mrg 
   1450  1.5  mrg <h3 class="heading"><a name="TOC79"></a>*-*-cygwin</h3>
   1451  1.1  mrg 
   1452  1.1  mrg <p>Ports of GCC are included with the
   1453  1.1  mrg <a href="http://www.cygwin.com/">Cygwin environment</a>.
   1454  1.1  mrg 
   1455  1.1  mrg    <p>GCC will build under Cygwin without modification; it does not build
   1456  1.1  mrg with Microsoft's C++ compiler and there are no plans to make it do so.
   1457  1.1  mrg 
   1458  1.1  mrg    <p>The Cygwin native compiler can be configured to target any 32-bit x86
   1459  1.1  mrg cpu architecture desired; the default is i686-pc-cygwin.  It should be
   1460  1.1  mrg used with as up-to-date a version of binutils as possible; use either
   1461  1.1  mrg the latest official GNU binutils release in the Cygwin distribution,
   1462  1.1  mrg or version 2.20 or above if building your own.
   1463  1.1  mrg 
   1464  1.5  mrg    <p><hr /><a name="x_002dx_002dinterix"></a>
   1465  1.1  mrg 
   1466  1.5  mrg <h3 class="heading"><a name="TOC80"></a>*-*-interix</h3>
   1467  1.1  mrg 
   1468  1.1  mrg <p>The Interix target is used by OpenNT, Interix, Services For UNIX (SFU),
   1469  1.1  mrg and Subsystem for UNIX-based Applications (SUA).  Applications compiled
   1470  1.1  mrg with this target run in the Interix subsystem, which is separate from
   1471  1.1  mrg the Win32 subsystem.  This target was last known to work in GCC 3.3.
   1472  1.1  mrg 
   1473  1.5  mrg    <p><hr /><a name="x_002dx_002dmingw32"></a>
   1474  1.1  mrg 
   1475  1.5  mrg <h3 class="heading"><a name="TOC81"></a>*-*-mingw32</h3>
   1476  1.1  mrg 
   1477  1.1  mrg <p>GCC will build with and support only MinGW runtime 3.12 and later. 
   1478  1.1  mrg Earlier versions of headers are incompatible with the new default semantics
   1479  1.1  mrg of <code>extern inline</code> in <code>-std=c99</code> and <code>-std=gnu99</code> modes.
   1480  1.1  mrg 
   1481  1.5  mrg    <p><hr /><a name="older"></a>
   1482  1.1  mrg 
   1483  1.5  mrg <h3 class="heading"><a name="TOC82"></a>Older systems</h3>
   1484  1.1  mrg 
   1485  1.1  mrg <p>GCC contains support files for many older (1980s and early
   1486  1.1  mrg 1990s) Unix variants.  For the most part, support for these systems
   1487  1.1  mrg has not been deliberately removed, but it has not been maintained for
   1488  1.1  mrg several years and may suffer from bitrot.
   1489  1.1  mrg 
   1490  1.1  mrg    <p>Starting with GCC 3.1, each release has a list of &ldquo;obsoleted&rdquo; systems. 
   1491  1.1  mrg Support for these systems is still present in that release, but
   1492  1.1  mrg <samp><span class="command">configure</span></samp> will fail unless the <samp><span class="option">--enable-obsolete</span></samp>
   1493  1.1  mrg option is given.  Unless a maintainer steps forward, support for these
   1494  1.1  mrg systems will be removed from the next release of GCC.
   1495  1.1  mrg 
   1496  1.1  mrg    <p>Support for old systems as hosts for GCC can cause problems if the
   1497  1.1  mrg workarounds for compiler, library and operating system bugs affect the
   1498  1.1  mrg cleanliness or maintainability of the rest of GCC.  In some cases, to
   1499  1.1  mrg bring GCC up on such a system, if still possible with current GCC, may
   1500  1.1  mrg require first installing an old version of GCC which did work on that
   1501  1.1  mrg system, and using it to compile a more recent GCC, to avoid bugs in the
   1502  1.1  mrg vendor compiler.  Old releases of GCC 1 and GCC 2 are available in the
   1503  1.1  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
   1504  1.1  mrg <samp><span class="command">fixincludes</span></samp>, but bugs or deficiencies in libraries and the
   1505  1.1  mrg operating system may still cause problems.
   1506  1.1  mrg 
   1507  1.1  mrg    <p>Support for older systems as targets for cross-compilation is less
   1508  1.1  mrg problematic than support for them as hosts for GCC; if an enthusiast
   1509  1.1  mrg wishes to make such a target work again (including resurrecting any of
   1510  1.1  mrg the targets that never worked with GCC 2, starting from the last
   1511  1.1  mrg version before they were removed), patches
   1512  1.1  mrg <a href="../contribute.html">following the usual requirements</a> would be
   1513  1.1  mrg likely to be accepted, since they should not affect the support for more
   1514  1.1  mrg modern targets.
   1515  1.1  mrg 
   1516  1.1  mrg    <p>For some systems, old versions of GNU binutils may also be useful,
   1517  1.1  mrg and are available from <samp><span class="file">pub/binutils/old-releases</span></samp> on
   1518  1.1  mrg <a href="http://sourceware.org/mirrors.html">sourceware.org mirror sites</a>.
   1519  1.1  mrg 
   1520  1.1  mrg    <p>Some of the information on specific systems above relates to
   1521  1.1  mrg such older systems, but much of the information
   1522  1.1  mrg about GCC on such systems (which may no longer be applicable to
   1523  1.1  mrg current GCC) is to be found in the GCC texinfo manual.
   1524  1.1  mrg 
   1525  1.5  mrg    <p><hr /><a name="elf"></a>
   1526  1.1  mrg 
   1527  1.5  mrg <h3 class="heading"><a name="TOC83"></a>all ELF targets (SVR4, Solaris 2, etc.)</h3>
   1528  1.1  mrg 
   1529  1.1  mrg <p>C++ support is significantly better on ELF targets if you use the
   1530  1.1  mrg <a href="./configure.html#with-gnu-ld">GNU linker</a>; duplicate copies of
   1531  1.1  mrg inlines, vtables and template instantiations will be discarded
   1532  1.1  mrg automatically.
   1533  1.1  mrg 
   1534  1.1  mrg    <p><hr />
   1535  1.1  mrg <p><a href="./index.html">Return to the GCC Installation page</a>
   1536  1.1  mrg 
   1537  1.1  mrg <!-- ***Old documentation****************************************************** -->
   1538  1.1  mrg <!-- ***GFDL******************************************************************** -->
   1539  1.1  mrg <!-- *************************************************************************** -->
   1540  1.1  mrg <!-- Part 6 The End of the Document -->
   1541  1.1  mrg </body></html>
   1542  1.1  mrg 
   1543