Home | History | Annotate | Line # | Download | only in INSTALL
specific.html revision 1.3
      1  1.1  mrg <html lang="en">
      2  1.1  mrg <head>
      3  1.1  mrg <title>Host/Target specific installation notes for GCC</title>
      4  1.1  mrg <meta http-equiv="Content-Type" content="text/html">
      5  1.1  mrg <meta name="description" content="Host/Target specific installation notes for GCC">
      6  1.1  mrg <meta name="generator" content="makeinfo 4.12">
      7  1.1  mrg <link title="Top" rel="top" href="#Top">
      8  1.1  mrg <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
      9  1.1  mrg <!--
     10  1.3  mrg Copyright (C) 1988-2015 Free Software Foundation, Inc.
     11  1.1  mrg 
     12  1.1  mrg    Permission is granted to copy, distribute and/or modify this document
     13  1.3  mrg under the terms of the GNU Free Documentation License, Version 1.3 or
     14  1.1  mrg any later version published by the Free Software Foundation; with no
     15  1.1  mrg Invariant Sections, the Front-Cover texts being (a) (see below), and
     16  1.1  mrg with the Back-Cover Texts being (b) (see below).  A copy of the
     17  1.1  mrg license is included in the section entitled "GNU Free Documentation License".
     18  1.1  mrg 
     19  1.1  mrg (a) The FSF's Front-Cover Text is:
     20  1.1  mrg 
     21  1.1  mrg      A GNU Manual
     22  1.1  mrg 
     23  1.1  mrg (b) The FSF's Back-Cover Text is:
     24  1.1  mrg 
     25  1.1  mrg      You have freedom to copy and modify this GNU Manual, like GNU
     26  1.1  mrg      software.  Copies published by the Free Software Foundation raise
     27  1.1  mrg      funds for GNU development.-->
     28  1.1  mrg <meta http-equiv="Content-Style-Type" content="text/css">
     29  1.1  mrg <style type="text/css"><!--
     30  1.1  mrg   pre.display { font-family:inherit }
     31  1.1  mrg   pre.format  { font-family:inherit }
     32  1.1  mrg   pre.smalldisplay { font-family:inherit; font-size:smaller }
     33  1.1  mrg   pre.smallformat  { font-family:inherit; font-size:smaller }
     34  1.1  mrg   pre.smallexample { font-size:smaller }
     35  1.1  mrg   pre.smalllisp    { font-size:smaller }
     36  1.1  mrg   span.sc    { font-variant:small-caps }
     37  1.1  mrg   span.roman { font-family:serif; font-weight:normal; } 
     38  1.1  mrg   span.sansserif { font-family:sans-serif; font-weight:normal; } 
     39  1.1  mrg --></style>
     40  1.1  mrg </head>
     41  1.1  mrg <body>
     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  1.3  mrg <li><a href="#aarch64x-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  1.3  mrg <li><a href="#ix86-x-solaris289">i?86-*-solaris2.9</a>
     69  1.1  mrg <li><a href="#ix86-x-solaris210">i?86-*-solaris2.10</a>
     70  1.1  mrg <li><a href="#ia64-x-linux">ia64-*-linux</a>
     71  1.1  mrg <li><a href="#ia64-x-hpux">ia64-*-hpux*</a>
     72  1.1  mrg <li><a href="#x-ibm-aix">*-ibm-aix*</a>
     73  1.1  mrg <li><a href="#iq2000-x-elf">iq2000-*-elf</a>
     74  1.1  mrg <li><a href="#lm32-x-elf">lm32-*-elf</a>
     75  1.1  mrg <li><a href="#lm32-x-uclinux">lm32-*-uclinux</a>
     76  1.1  mrg <li><a href="#m32c-x-elf">m32c-*-elf</a>
     77  1.1  mrg <li><a href="#m32r-x-elf">m32r-*-elf</a>
     78  1.1  mrg <li><a href="#m68k-x-x">m68k-*-*</a>
     79  1.1  mrg <li><a href="#m68k-uclinux">m68k-uclinux</a>
     80  1.1  mrg <li><a href="#mep-x-elf">mep-*-elf</a>
     81  1.3  mrg <li><a href="#microblaze-x-elf">microblaze-*-elf</a>
     82  1.1  mrg <li><a href="#mips-x-x">mips-*-*</a>
     83  1.1  mrg <li><a href="#mips-sgi-irix5">mips-sgi-irix5</a>
     84  1.1  mrg <li><a href="#mips-sgi-irix6">mips-sgi-irix6</a>
     85  1.1  mrg <li><a href="#powerpc-x-x">powerpc*-*-*</a>
     86  1.1  mrg <li><a href="#powerpc-x-darwin">powerpc-*-darwin*</a>
     87  1.1  mrg <li><a href="#powerpc-x-elf">powerpc-*-elf</a>
     88  1.1  mrg <li><a href="#powerpc-x-linux-gnu">powerpc*-*-linux-gnu*</a>
     89  1.1  mrg <li><a href="#powerpc-x-netbsd">powerpc-*-netbsd*</a>
     90  1.1  mrg <li><a href="#powerpc-x-eabisim">powerpc-*-eabisim</a>
     91  1.1  mrg <li><a href="#powerpc-x-eabi">powerpc-*-eabi</a>
     92  1.1  mrg <li><a href="#powerpcle-x-elf">powerpcle-*-elf</a>
     93  1.1  mrg <li><a href="#powerpcle-x-eabisim">powerpcle-*-eabisim</a>
     94  1.1  mrg <li><a href="#powerpcle-x-eabi">powerpcle-*-eabi</a>
     95  1.1  mrg <li><a href="#s390-x-linux">s390-*-linux*</a>
     96  1.1  mrg <li><a href="#s390x-x-linux">s390x-*-linux*</a>
     97  1.1  mrg <li><a href="#s390x-ibm-tpf">s390x-ibm-tpf*</a>
     98  1.1  mrg <li><a href="#x-x-solaris2">*-*-solaris2*</a>
     99  1.3  mrg <li><a href="#sparc-x-x">sparc*-*-*</a>
    100  1.1  mrg <li><a href="#sparc-sun-solaris2">sparc-sun-solaris2*</a>
    101  1.1  mrg <li><a href="#sparc-sun-solaris210">sparc-sun-solaris2.10</a>
    102  1.1  mrg <li><a href="#sparc-x-linux">sparc-*-linux*</a>
    103  1.1  mrg <li><a href="#sparc64-x-solaris2">sparc64-*-solaris2*</a>
    104  1.1  mrg <li><a href="#sparcv9-x-solaris2">sparcv9-*-solaris2*</a>
    105  1.3  mrg <li><a href="#c6x-x-x">c6x-*-*</a>
    106  1.3  mrg <li><a href="#tilegx-x-linux">tilegx-*-linux*</a>
    107  1.3  mrg <li><a href="#tilepro-x-linux">tilepro-*-linux*</a>
    108  1.1  mrg <li><a href="#x-x-vxworks">*-*-vxworks*</a>
    109  1.1  mrg <li><a href="#x86-64-x-x">x86_64-*-*</a> amd64-*-*
    110  1.3  mrg <li><a href="#x86-64-x-solaris210">x86_64-*-solaris2.1[0-9]*</a>
    111  1.1  mrg <li><a href="#xtensa-x-elf">xtensa*-*-elf</a>
    112  1.1  mrg <li><a href="#xtensa-x-linux">xtensa*-*-linux*</a>
    113  1.1  mrg <li><a href="#windows">Microsoft Windows</a>
    114  1.1  mrg <li><a href="#x-x-cygwin">*-*-cygwin</a>
    115  1.1  mrg <li><a href="#x-x-interix">*-*-interix</a>
    116  1.1  mrg <li><a href="#x-x-mingw32">*-*-mingw32</a>
    117  1.1  mrg <li><a href="#os2">OS/2</a>
    118  1.1  mrg <li><a href="#older">Older systems</a>
    119  1.1  mrg </ul>
    120  1.1  mrg 
    121  1.1  mrg      <ul>
    122  1.1  mrg <li><a href="#elf">all ELF targets</a> (SVR4, Solaris 2, etc.) 
    123  1.1  mrg </ul>
    124  1.1  mrg 
    125  1.1  mrg    <p><!-- -------- host/target specific issues start here ---------------- -->
    126  1.1  mrg <hr />
    127  1.1  mrg 
    128  1.3  mrg <h3 class="heading"><a name="TOC0"></a><a name="aarch64x_002dx_002dx"></a>aarch64*-*-*</h3>
    129  1.3  mrg 
    130  1.3  mrg <p>To enable a workaround for the Cortex-A53 erratum number 835769 by default
    131  1.3  mrg (for all CPUs regardless of -mcpu option given) at configure time use the
    132  1.3  mrg <samp><span class="option">--enable-fix-cortex-a53-835769</span></samp> option.  This will enable the fix by
    133  1.3  mrg default and can be explicitly disabled during during compilation by passing the
    134  1.3  mrg <samp><span class="option">-mno-fix-cortex-a53-835769</span></samp> option.  Conversely,
    135  1.3  mrg <samp><span class="option">--disable-fix-cortex-a53-835769</span></samp> will disable the workaround by
    136  1.3  mrg default.  The workaround is disabled by default if neither of
    137  1.3  mrg <samp><span class="option">--enable-fix-cortex-a53-835769</span></samp> or
    138  1.3  mrg <samp><span class="option">--disable-fix-cortex-a53-835769</span></samp> is given at configure time.
    139  1.3  mrg 
    140  1.3  mrg <h3 class="heading"><a name="TOC1"></a><a name="alpha_002dx_002dx"></a>alpha*-*-*</h3>
    141  1.1  mrg 
    142  1.1  mrg <p>This section contains general configuration information for all
    143  1.1  mrg alpha-based platforms using ELF (in particular, ignore this section for
    144  1.1  mrg DEC OSF/1, Digital UNIX and Tru64 UNIX).  In addition to reading this
    145  1.1  mrg section, please read all other sections that match your target.
    146  1.1  mrg 
    147  1.1  mrg    <p>We require binutils 2.11.2 or newer. 
    148  1.1  mrg Previous binutils releases had a number of problems with DWARF 2
    149  1.1  mrg debugging information, not the least of which is incorrect linking of
    150  1.1  mrg shared libraries.
    151  1.1  mrg 
    152  1.1  mrg    <p><hr />
    153  1.1  mrg 
    154  1.3  mrg <h3 class="heading"><a name="TOC2"></a><a name="alpha_002ddec_002dosf51"></a>alpha*-dec-osf5.1</h3>
    155  1.1  mrg 
    156  1.1  mrg <p>Systems using processors that implement the DEC Alpha architecture and
    157  1.1  mrg are running the DEC/Compaq/HP Unix (DEC OSF/1, Digital UNIX, or Compaq/HP
    158  1.1  mrg Tru64 UNIX) operating system, for example the DEC Alpha AXP systems.
    159  1.1  mrg 
    160  1.3  mrg    <p>Support for Tru64 UNIX V5.1 has been removed in GCC 4.8.  As of GCC 4.6,
    161  1.3  mrg support for Tru64 UNIX V4.0 and V5.0 has been removed.  As of GCC 3.2,
    162  1.3  mrg versions before <code>alpha*-dec-osf4</code> are no longer supported.  (These
    163  1.3  mrg are the versions which identify themselves as DEC OSF/1.)
    164  1.1  mrg 
    165  1.1  mrg    <p><hr />
    166  1.1  mrg 
    167  1.3  mrg <h3 class="heading"><a name="TOC3"></a><a name="amd64_002dx_002dsolaris210"></a>amd64-*-solaris2.1[0-9]*</h3>
    168  1.1  mrg 
    169  1.3  mrg <p>This is a synonym for &lsquo;<samp><span class="samp">x86_64-*-solaris2.1[0-9]*</span></samp>&rsquo;.
    170  1.1  mrg 
    171  1.1  mrg    <p><hr />
    172  1.1  mrg 
    173  1.3  mrg <h3 class="heading"><a name="TOC4"></a><a name="arm_002dx_002deabi"></a>arm-*-eabi</h3>
    174  1.1  mrg 
    175  1.1  mrg <p>ARM-family processors.  Subtargets that use the ELF object format
    176  1.1  mrg require GNU binutils 2.13 or newer.  Such subtargets include:
    177  1.3  mrg <code>arm-*-netbsdelf</code>, <code>arm-*-*linux-*</code>
    178  1.3  mrg and <code>arm-*-rtemseabi</code>.
    179  1.1  mrg 
    180  1.1  mrg    <p><hr />
    181  1.1  mrg 
    182  1.3  mrg <h3 class="heading"><a name="TOC5"></a><a name="avr"></a>avr</h3>
    183  1.1  mrg 
    184  1.1  mrg <p>ATMEL AVR-family micro controllers.  These are used in embedded
    185  1.1  mrg applications.  There are no standard Unix configurations. 
    186  1.1  mrg See &ldquo;AVR Options&rdquo; in the main manual
    187  1.1  mrg for the list of supported MCU types.
    188  1.1  mrg 
    189  1.1  mrg    <p>Use &lsquo;<samp><span class="samp">configure --target=avr --enable-languages="c"</span></samp>&rsquo; to configure GCC.
    190  1.1  mrg 
    191  1.1  mrg    <p>Further installation notes and other useful information about AVR tools
    192  1.1  mrg can also be obtained from:
    193  1.1  mrg 
    194  1.1  mrg      <ul>
    195  1.1  mrg <li><a href="http://www.nongnu.org/avr/">http://www.nongnu.org/avr/</a>
    196  1.1  mrg <li><a href="http://www.amelek.gda.pl/avr/">http://www.amelek.gda.pl/avr/</a>
    197  1.1  mrg </ul>
    198  1.1  mrg 
    199  1.1  mrg    <p>We <em>strongly</em> recommend using binutils 2.13 or newer.
    200  1.1  mrg 
    201  1.1  mrg    <p>The following error:
    202  1.3  mrg <pre class="smallexample">     Error: register required
    203  1.1  mrg </pre>
    204  1.1  mrg    <p>indicates that you should upgrade to a newer version of the binutils.
    205  1.1  mrg 
    206  1.1  mrg    <p><hr />
    207  1.1  mrg 
    208  1.3  mrg <h3 class="heading"><a name="TOC6"></a><a name="bfin"></a>Blackfin</h3>
    209  1.1  mrg 
    210  1.1  mrg <p>The Blackfin processor, an Analog Devices DSP. 
    211  1.1  mrg See &ldquo;Blackfin Options&rdquo; in the main manual
    212  1.1  mrg 
    213  1.1  mrg    <p>More information, and a version of binutils with support for this processor,
    214  1.1  mrg is available at <a href="http://blackfin.uclinux.org">http://blackfin.uclinux.org</a>
    215  1.1  mrg 
    216  1.1  mrg    <p><hr />
    217  1.1  mrg 
    218  1.3  mrg <h3 class="heading"><a name="TOC7"></a><a name="cr16"></a>CR16</h3>
    219  1.3  mrg 
    220  1.3  mrg <p>The CR16 CompactRISC architecture is a 16-bit architecture. This architecture is
    221  1.3  mrg used in embedded applications.
    222  1.3  mrg 
    223  1.3  mrg    <p>See &ldquo;CR16 Options&rdquo; in the main manual for a list of CR16-specific options.
    224  1.3  mrg 
    225  1.3  mrg    <p>Use &lsquo;<samp><span class="samp">configure --target=cr16-elf --enable-languages=c,c++</span></samp>&rsquo; to configure
    226  1.3  mrg GCC for building a CR16 elf cross-compiler.
    227  1.3  mrg 
    228  1.3  mrg    <p>Use &lsquo;<samp><span class="samp">configure --target=cr16-uclinux --enable-languages=c,c++</span></samp>&rsquo; to configure
    229  1.3  mrg GCC for building a CR16 uclinux cross-compiler.
    230  1.3  mrg 
    231  1.3  mrg    <p><hr />
    232  1.3  mrg 
    233  1.3  mrg <h3 class="heading"><a name="TOC8"></a><a name="cris"></a>CRIS</h3>
    234  1.1  mrg 
    235  1.1  mrg <p>CRIS is the CPU architecture in Axis Communications ETRAX system-on-a-chip
    236  1.1  mrg series.  These are used in embedded applications.
    237  1.1  mrg 
    238  1.1  mrg    <p>See &ldquo;CRIS Options&rdquo; in the main manual
    239  1.1  mrg for a list of CRIS-specific options.
    240  1.1  mrg 
    241  1.1  mrg    <p>There are a few different CRIS targets:
    242  1.1  mrg      <dl>
    243  1.1  mrg <dt><code>cris-axis-elf</code><dd>Mainly for monolithic embedded systems.  Includes a multilib for the
    244  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;. 
    245  1.1  mrg <br><dt><code>cris-axis-linux-gnu</code><dd>A GNU/Linux port for the CRIS architecture, currently targeting
    246  1.1  mrg &lsquo;<samp><span class="samp">ETRAX 100 LX</span></samp>&rsquo; by default. 
    247  1.1  mrg </dl>
    248  1.1  mrg 
    249  1.1  mrg    <p>For <code>cris-axis-elf</code> you need binutils 2.11
    250  1.1  mrg or newer.  For <code>cris-axis-linux-gnu</code> you need binutils 2.12 or newer.
    251  1.1  mrg 
    252  1.1  mrg    <p>Pre-packaged tools can be obtained from
    253  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
    254  1.1  mrg information about this platform is available at
    255  1.1  mrg <a href="http://developer.axis.com/">http://developer.axis.com/</a>.
    256  1.1  mrg 
    257  1.1  mrg    <p><hr />
    258  1.1  mrg 
    259  1.3  mrg <h3 class="heading"><a name="TOC9"></a><a name="dos"></a>DOS</h3>
    260  1.1  mrg 
    261  1.1  mrg <p>Please have a look at the <a href="binaries.html">binaries page</a>.
    262  1.1  mrg 
    263  1.1  mrg    <p>You cannot install GCC by itself on MSDOS; it will not compile under
    264  1.1  mrg any MSDOS compiler except itself.  You need to get the complete
    265  1.1  mrg compilation package DJGPP, which includes binaries as well as sources,
    266  1.1  mrg and includes all the necessary compilation tools and libraries.
    267  1.1  mrg 
    268  1.1  mrg    <p><hr />
    269  1.1  mrg 
    270  1.3  mrg <h3 class="heading"><a name="TOC10"></a><a name="epiphany_002dx_002delf"></a>epiphany-*-elf</h3>
    271  1.3  mrg 
    272  1.3  mrg <p>Adapteva Epiphany. 
    273  1.3  mrg This configuration is intended for embedded systems.
    274  1.3  mrg 
    275  1.3  mrg    <p><hr />
    276  1.3  mrg 
    277  1.3  mrg <h3 class="heading"><a name="TOC11"></a><a name="x_002dx_002dfreebsd"></a>*-*-freebsd*</h3>
    278  1.1  mrg 
    279  1.1  mrg <p>Support for FreeBSD 1 was discontinued in GCC 3.2.  Support for
    280  1.1  mrg FreeBSD 2 (and any mutant a.out variants of FreeBSD 3) was
    281  1.1  mrg discontinued in GCC 4.0.
    282  1.1  mrg 
    283  1.3  mrg    <p>In order to better utilize FreeBSD base system functionality and match
    284  1.3  mrg the configuration of the system compiler, GCC 4.5 and above as well as
    285  1.3  mrg GCC 4.4 past 2010-06-20 leverage SSP support in libc (which is present
    286  1.3  mrg on FreeBSD 7 or later) and the use of <code>__cxa_atexit</code> by default
    287  1.3  mrg (on FreeBSD 6 or later).  The use of <code>dl_iterate_phdr</code> inside
    288  1.3  mrg <samp><span class="file">libgcc_s.so.1</span></samp> and boehm-gc (on FreeBSD 7 or later) is enabled
    289  1.3  mrg by GCC 4.5 and above.
    290  1.1  mrg 
    291  1.1  mrg    <p>We support FreeBSD using the ELF file format with DWARF 2 debugging
    292  1.1  mrg for all CPU architectures.  You may use <samp><span class="option">-gstabs</span></samp> instead of
    293  1.1  mrg <samp><span class="option">-g</span></samp>, if you really want the old debugging format.  There are
    294  1.1  mrg no known issues with mixing object files and libraries with different
    295  1.1  mrg debugging formats.  Otherwise, this release of GCC should now match
    296  1.1  mrg more of the configuration used in the stock FreeBSD configuration of
    297  1.1  mrg GCC.  In particular, <samp><span class="option">--enable-threads</span></samp> is now configured by
    298  1.1  mrg default.  However, as a general user, do not attempt to replace the
    299  1.1  mrg system compiler with this release.  Known to bootstrap and check with
    300  1.1  mrg good results on FreeBSD 7.2-STABLE.  In the past, known to bootstrap
    301  1.1  mrg and check with good results on FreeBSD 3.0, 3.4, 4.0, 4.2, 4.3, 4.4,
    302  1.1  mrg 4.5, 4.8, 4.9 and 5-CURRENT.
    303  1.1  mrg 
    304  1.1  mrg    <p>The version of binutils installed in <samp><span class="file">/usr/bin</span></samp> probably works
    305  1.1  mrg with this release of GCC.  Bootstrapping against the latest GNU
    306  1.1  mrg binutils and/or the version found in <samp><span class="file">/usr/ports/devel/binutils</span></samp> has
    307  1.1  mrg been known to enable additional features and improve overall testsuite
    308  1.1  mrg results.  However, it is currently known that boehm-gc (which itself
    309  1.1  mrg is required for java) may not configure properly on FreeBSD prior to
    310  1.1  mrg the FreeBSD 7.0 release with GNU binutils after 2.16.1.
    311  1.1  mrg 
    312  1.1  mrg    <p><hr />
    313  1.1  mrg 
    314  1.3  mrg <h3 class="heading"><a name="TOC12"></a><a name="h8300_002dhms"></a>h8300-hms</h3>
    315  1.1  mrg 
    316  1.1  mrg <p>Renesas H8/300 series of processors.
    317  1.1  mrg 
    318  1.1  mrg    <p>Please have a look at the <a href="binaries.html">binaries page</a>.
    319  1.1  mrg 
    320  1.1  mrg    <p>The calling convention and structure layout has changed in release 2.6. 
    321  1.1  mrg All code must be recompiled.  The calling convention now passes the
    322  1.1  mrg first three arguments in function calls in registers.  Structures are no
    323  1.1  mrg longer a multiple of 2 bytes.
    324  1.1  mrg 
    325  1.1  mrg    <p><hr />
    326  1.1  mrg 
    327  1.3  mrg <h3 class="heading"><a name="TOC13"></a><a name="hppa_002dhp_002dhpux"></a>hppa*-hp-hpux*</h3>
    328  1.1  mrg 
    329  1.1  mrg <p>Support for HP-UX version 9 and older was discontinued in GCC 3.4.
    330  1.1  mrg 
    331  1.1  mrg    <p>We require using gas/binutils on all hppa platforms.  Version 2.19 or
    332  1.1  mrg later is recommended.
    333  1.1  mrg 
    334  1.1  mrg    <p>It may be helpful to configure GCC with the
    335  1.1  mrg <a href="./configure.html#with-gnu-as"><samp><span class="option">--with-gnu-as</span></samp></a> and
    336  1.1  mrg <samp><span class="option">--with-as=...</span></samp> options to ensure that GCC can find GAS.
    337  1.1  mrg 
    338  1.1  mrg    <p>The HP assembler should not be used with GCC.  It is rarely tested and may
    339  1.1  mrg not work.  It shouldn't be used with any languages other than C due to its
    340  1.1  mrg many limitations.
    341  1.1  mrg 
    342  1.1  mrg    <p>Specifically, <samp><span class="option">-g</span></samp> does not work (HP-UX uses a peculiar debugging
    343  1.1  mrg format which GCC does not know about).  It also inserts timestamps
    344  1.1  mrg into each object file it creates, causing the 3-stage comparison test to
    345  1.1  mrg fail during a bootstrap.  You should be able to continue by saying
    346  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;.
    347  1.1  mrg 
    348  1.1  mrg    <p>Various GCC features are not supported.  For example, it does not support weak
    349  1.1  mrg symbols or alias definitions.  As a result, explicit template instantiations
    350  1.1  mrg are required when using C++.  This makes it difficult if not impossible to
    351  1.1  mrg build many C++ applications.
    352  1.1  mrg 
    353  1.1  mrg    <p>There are two default scheduling models for instructions.  These are
    354  1.1  mrg PROCESSOR_7100LC and PROCESSOR_8000.  They are selected from the pa-risc
    355  1.1  mrg architecture specified for the target machine when configuring. 
    356  1.1  mrg PROCESSOR_8000 is the default.  PROCESSOR_7100LC is selected when
    357  1.1  mrg the target is a &lsquo;<samp><span class="samp">hppa1*</span></samp>&rsquo; machine.
    358  1.1  mrg 
    359  1.1  mrg    <p>The PROCESSOR_8000 model is not well suited to older processors.  Thus,
    360  1.1  mrg it is important to completely specify the machine architecture when
    361  1.1  mrg configuring if you want a model other than PROCESSOR_8000.  The macro
    362  1.1  mrg TARGET_SCHED_DEFAULT can be defined in BOOT_CFLAGS if a different
    363  1.1  mrg default scheduling model is desired.
    364  1.1  mrg 
    365  1.1  mrg    <p>As of GCC 4.0, GCC uses the UNIX 95 namespace for HP-UX 10.10
    366  1.1  mrg through 11.00, and the UNIX 98 namespace for HP-UX 11.11 and later. 
    367  1.1  mrg This namespace change might cause problems when bootstrapping with
    368  1.1  mrg an earlier version of GCC or the HP compiler as essentially the same
    369  1.1  mrg namespace is required for an entire build.  This problem can be avoided
    370  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;
    371  1.1  mrg or &lsquo;<samp><span class="samp">98</span></samp>&rsquo;.  Another way is to add an appropriate set of predefines
    372  1.1  mrg to <samp><span class="env">CC</span></samp>.  The description for the <samp><span class="option">munix=</span></samp> option contains
    373  1.1  mrg a list of the predefines used with each standard.
    374  1.1  mrg 
    375  1.1  mrg    <p>More specific information to &lsquo;<samp><span class="samp">hppa*-hp-hpux*</span></samp>&rsquo; targets follows.
    376  1.1  mrg 
    377  1.1  mrg    <p><hr />
    378  1.1  mrg 
    379  1.3  mrg <h3 class="heading"><a name="TOC14"></a><a name="hppa_002dhp_002dhpux10"></a>hppa*-hp-hpux10</h3>
    380  1.1  mrg 
    381  1.1  mrg <p>For hpux10.20, we <em>highly</em> recommend you pick up the latest sed patch
    382  1.1  mrg <code>PHCO_19798</code> from HP.
    383  1.1  mrg 
    384  1.1  mrg    <p>The C++ ABI has changed incompatibly in GCC 4.0.  COMDAT subspaces are
    385  1.1  mrg used for one-only code and data.  This resolves many of the previous
    386  1.1  mrg problems in using C++ on this target.  However, the ABI is not compatible
    387  1.1  mrg with the one implemented under HP-UX 11 using secondary definitions.
    388  1.1  mrg 
    389  1.1  mrg    <p><hr />
    390  1.1  mrg 
    391  1.3  mrg <h3 class="heading"><a name="TOC15"></a><a name="hppa_002dhp_002dhpux11"></a>hppa*-hp-hpux11</h3>
    392  1.1  mrg 
    393  1.1  mrg <p>GCC 3.0 and up support HP-UX 11.  GCC 2.95.x is not supported and cannot
    394  1.1  mrg be used to compile GCC 3.0 and up.
    395  1.1  mrg 
    396  1.1  mrg    <p>The libffi and libjava libraries haven't been ported to 64-bit HP-UX and don't build.
    397  1.1  mrg 
    398  1.1  mrg    <p>Refer to <a href="binaries.html">binaries</a> for information about obtaining
    399  1.1  mrg precompiled GCC binaries for HP-UX.  Precompiled binaries must be obtained
    400  1.1  mrg to build the Ada language as it can't be bootstrapped using C.  Ada is
    401  1.1  mrg only available for the 32-bit PA-RISC runtime.
    402  1.1  mrg 
    403  1.1  mrg    <p>Starting with GCC 3.4 an ISO C compiler is required to bootstrap.  The
    404  1.1  mrg bundled compiler supports only traditional C; you will need either HP's
    405  1.1  mrg unbundled compiler, or a binary distribution of GCC.
    406  1.1  mrg 
    407  1.1  mrg    <p>It is possible to build GCC 3.3 starting with the bundled HP compiler,
    408  1.1  mrg but the process requires several steps.  GCC 3.3 can then be used to
    409  1.1  mrg build later versions.  The fastjar program contains ISO C code and
    410  1.1  mrg can't be built with the HP bundled compiler.  This problem can be
    411  1.1  mrg avoided by not building the Java language.  For example, use the
    412  1.1  mrg <samp><span class="option">--enable-languages="c,c++,f77,objc"</span></samp> option in your configure
    413  1.1  mrg command.
    414  1.1  mrg 
    415  1.1  mrg    <p>There are several possible approaches to building the distribution. 
    416  1.1  mrg Binutils can be built first using the HP tools.  Then, the GCC
    417  1.1  mrg distribution can be built.  The second approach is to build GCC
    418  1.1  mrg first using the HP tools, then build binutils, then rebuild GCC. 
    419  1.1  mrg There have been problems with various binary distributions, so it
    420  1.1  mrg is best not to start from a binary distribution.
    421  1.1  mrg 
    422  1.1  mrg    <p>On 64-bit capable systems, there are two distinct targets.  Different
    423  1.1  mrg installation prefixes must be used if both are to be installed on
    424  1.1  mrg the same system.  The &lsquo;<samp><span class="samp">hppa[1-2]*-hp-hpux11*</span></samp>&rsquo; target generates code
    425  1.1  mrg for the 32-bit PA-RISC runtime architecture and uses the HP linker. 
    426  1.1  mrg The &lsquo;<samp><span class="samp">hppa64-hp-hpux11*</span></samp>&rsquo; target generates 64-bit code for the
    427  1.1  mrg PA-RISC 2.0 architecture.
    428  1.1  mrg 
    429  1.1  mrg    <p>The script config.guess now selects the target type based on the compiler
    430  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
    431  1.1  mrg that configure finds an appropriate compiler for the initial bootstrap. 
    432  1.1  mrg When <samp><span class="env">CC</span></samp> is used, the definition should contain the options that are
    433  1.1  mrg needed whenever <samp><span class="env">CC</span></samp> is used.
    434  1.1  mrg 
    435  1.1  mrg    <p>Specifically, options that determine the runtime architecture must be
    436  1.1  mrg in <samp><span class="env">CC</span></samp> to correctly select the target for the build.  It is also
    437  1.1  mrg convenient to place many other compiler options in <samp><span class="env">CC</span></samp>.  For example,
    438  1.1  mrg <samp><span class="env">CC="cc -Ac +DA2.0W -Wp,-H16376 -D_CLASSIC_TYPES -D_HPUX_SOURCE"</span></samp>
    439  1.1  mrg can be used to bootstrap the GCC 3.3 branch with the HP compiler in
    440  1.1  mrg 64-bit K&amp;R/bundled mode.  The <samp><span class="option">+DA2.0W</span></samp> option will result in
    441  1.1  mrg the automatic selection of the &lsquo;<samp><span class="samp">hppa64-hp-hpux11*</span></samp>&rsquo; target.  The
    442  1.1  mrg macro definition table of cpp needs to be increased for a successful
    443  1.1  mrg build with the HP compiler.  _CLASSIC_TYPES and _HPUX_SOURCE need to
    444  1.1  mrg be defined when building with the bundled compiler, or when using the
    445  1.1  mrg <samp><span class="option">-Ac</span></samp> option.  These defines aren't necessary with <samp><span class="option">-Ae</span></samp>.
    446  1.1  mrg 
    447  1.1  mrg    <p>It is best to explicitly configure the &lsquo;<samp><span class="samp">hppa64-hp-hpux11*</span></samp>&rsquo; target
    448  1.1  mrg with the <samp><span class="option">--with-ld=...</span></samp> option.  This overrides the standard
    449  1.1  mrg search for ld.  The two linkers supported on this target require different
    450  1.1  mrg commands.  The default linker is determined during configuration.  As a
    451  1.1  mrg result, it's not possible to switch linkers in the middle of a GCC build. 
    452  1.1  mrg This has been reported to sometimes occur in unified builds of binutils
    453  1.1  mrg and GCC.
    454  1.1  mrg 
    455  1.1  mrg    <p>A recent linker patch must be installed for the correct operation of
    456  1.1  mrg GCC 3.3 and later.  <code>PHSS_26559</code> and <code>PHSS_24304</code> are the
    457  1.1  mrg oldest linker patches that are known to work.  They are for HP-UX
    458  1.1  mrg 11.00 and 11.11, respectively.  <code>PHSS_24303</code>, the companion to
    459  1.1  mrg <code>PHSS_24304</code>, might be usable but it hasn't been tested.  These
    460  1.1  mrg patches have been superseded.  Consult the HP patch database to obtain
    461  1.1  mrg the currently recommended linker patch for your system.
    462  1.1  mrg 
    463  1.1  mrg    <p>The patches are necessary for the support of weak symbols on the
    464  1.1  mrg 32-bit port, and for the running of initializers and finalizers.  Weak
    465  1.1  mrg symbols are implemented using SOM secondary definition symbols.  Prior
    466  1.1  mrg to HP-UX 11, there are bugs in the linker support for secondary symbols. 
    467  1.1  mrg The patches correct a problem of linker core dumps creating shared
    468  1.1  mrg libraries containing secondary symbols, as well as various other
    469  1.1  mrg linking issues involving secondary symbols.
    470  1.1  mrg 
    471  1.1  mrg    <p>GCC 3.3 uses the ELF DT_INIT_ARRAY and DT_FINI_ARRAY capabilities to
    472  1.1  mrg run initializers and finalizers on the 64-bit port.  The 32-bit port
    473  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
    474  1.1  mrg purpose.  The patches correct various problems with the +init/+fini
    475  1.1  mrg options, including program core dumps.  Binutils 2.14 corrects a
    476  1.1  mrg problem on the 64-bit port resulting from HP's non-standard use of
    477  1.1  mrg the .init and .fini sections for array initializers and finalizers.
    478  1.1  mrg 
    479  1.1  mrg    <p>Although the HP and GNU linkers are both supported for the
    480  1.1  mrg &lsquo;<samp><span class="samp">hppa64-hp-hpux11*</span></samp>&rsquo; target, it is strongly recommended that the
    481  1.1  mrg HP linker be used for link editing on this target.
    482  1.1  mrg 
    483  1.1  mrg    <p>At this time, the GNU linker does not support the creation of long
    484  1.1  mrg branch stubs.  As a result, it can't successfully link binaries
    485  1.1  mrg containing branch offsets larger than 8 megabytes.  In addition,
    486  1.1  mrg there are problems linking shared libraries, linking executables
    487  1.1  mrg with <samp><span class="option">-static</span></samp>, and with dwarf2 unwind and exception support. 
    488  1.1  mrg It also doesn't provide stubs for internal calls to global functions
    489  1.1  mrg in shared libraries, so these calls can't be overloaded.
    490  1.1  mrg 
    491  1.1  mrg    <p>The HP dynamic loader does not support GNU symbol versioning, so symbol
    492  1.1  mrg versioning is not supported.  It may be necessary to disable symbol
    493  1.1  mrg versioning with <samp><span class="option">--disable-symvers</span></samp> when using GNU ld.
    494  1.1  mrg 
    495  1.1  mrg    <p>POSIX threads are the default.  The optional DCE thread library is not
    496  1.1  mrg supported, so <samp><span class="option">--enable-threads=dce</span></samp> does not work.
    497  1.1  mrg 
    498  1.1  mrg    <p><hr />
    499  1.1  mrg 
    500  1.3  mrg <h3 class="heading"><a name="TOC16"></a><a name="x_002dx_002dlinux_002dgnu"></a>*-*-linux-gnu</h3>
    501  1.1  mrg 
    502  1.1  mrg <p>Versions of libstdc++-v3 starting with 3.2.1 require bug fixes present
    503  1.1  mrg in glibc 2.2.5 and later.  More information is available in the
    504  1.1  mrg libstdc++-v3 documentation.
    505  1.1  mrg 
    506  1.1  mrg    <p><hr />
    507  1.1  mrg 
    508  1.3  mrg <h3 class="heading"><a name="TOC17"></a><a name="ix86_002dx_002dlinux"></a>i?86-*-linux*</h3>
    509  1.1  mrg 
    510  1.1  mrg <p>As of GCC 3.3, binutils 2.13.1 or later is required for this platform. 
    511  1.1  mrg See <a href="http://gcc.gnu.org/PR10877">bug 10877</a> for more information.
    512  1.1  mrg 
    513  1.1  mrg    <p>If you receive Signal 11 errors when building on GNU/Linux, then it is
    514  1.1  mrg possible you have a hardware problem.  Further information on this can be
    515  1.1  mrg found on <a href="http://www.bitwizard.nl/sig11/">www.bitwizard.nl</a>.
    516  1.1  mrg 
    517  1.1  mrg    <p><hr />
    518  1.1  mrg 
    519  1.3  mrg <h3 class="heading"><a name="TOC18"></a><a name="ix86_002dx_002dsolaris29"></a>i?86-*-solaris2.9</h3>
    520  1.1  mrg 
    521  1.3  mrg <p>The Sun assembler in Solaris 9 has several bugs and limitations. 
    522  1.1  mrg While GCC works around them, several features are missing, so it is
    523  1.1  mrg <!-- FIXME: which ones? -->
    524  1.1  mrg recommended to use the GNU assembler instead.  There is no bundled
    525  1.3  mrg version, but the current version, from GNU binutils 2.22, is known to
    526  1.1  mrg work.
    527  1.1  mrg 
    528  1.3  mrg    <p>Solaris&nbsp;2/x86 doesn't support the execution of SSE/SSE2 instructions
    529  1.3  mrg before Solaris&nbsp;9 4/04, even if the CPU supports them.  Programs will
    530  1.1  mrg receive <code>SIGILL</code> if they try.  The fix is available both in
    531  1.3  mrg Solaris&nbsp;9 Update&nbsp;6 and kernel patch 112234-12 or newer.  To
    532  1.3  mrg avoid this problem,
    533  1.3  mrg <samp><span class="option">-march</span></samp> defaults to &lsquo;<samp><span class="samp">pentiumpro</span></samp>&rsquo; on Solaris 9.  If
    534  1.1  mrg you have the patch installed, you can configure GCC with an appropriate
    535  1.1  mrg <samp><span class="option">--with-arch</span></samp> option, but need GNU <samp><span class="command">as</span></samp> for SSE2 support.
    536  1.1  mrg 
    537  1.1  mrg    <p><hr />
    538  1.1  mrg 
    539  1.3  mrg <h3 class="heading"><a name="TOC19"></a><a name="ix86_002dx_002dsolaris210"></a>i?86-*-solaris2.10</h3>
    540  1.1  mrg 
    541  1.3  mrg <p>Use this for Solaris 10 or later on x86 and x86-64 systems.  Starting
    542  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
    543  1.3  mrg &lsquo;<samp><span class="samp">x86_64-*-solaris2.1[0-9]*</span></samp>&rsquo; configuration that corresponds to
    544  1.3  mrg &lsquo;<samp><span class="samp">sparcv9-sun-solaris2*</span></samp>&rsquo;.
    545  1.1  mrg 
    546  1.1  mrg    <p>It is recommended that you configure GCC to use the GNU assembler, in
    547  1.1  mrg <samp><span class="file">/usr/sfw/bin/gas</span></samp>.  The versions included in Solaris 10, from GNU
    548  1.1  mrg binutils 2.15, and Solaris 11, from GNU binutils 2.19, work fine,
    549  1.1  mrg although the current version, from GNU binutils
    550  1.3  mrg 2.22, is known to work, too.  Recent versions of the Sun assembler in
    551  1.1  mrg <samp><span class="file">/usr/ccs/bin/as</span></samp> work almost as well, though. 
    552  1.1  mrg <!-- FIXME: as patch requirements? -->
    553  1.1  mrg 
    554  1.1  mrg    <p>For linking, the Sun linker, is preferred.  If you want to use the GNU
    555  1.1  mrg linker instead, which is available in <samp><span class="file">/usr/sfw/bin/gld</span></samp>, note that
    556  1.1  mrg due to a packaging bug the version in Solaris 10, from GNU binutils
    557  1.1  mrg 2.15, cannot be used, while the version in Solaris 11, from GNU binutils
    558  1.3  mrg 2.19, works, as does the latest version, from GNU binutils 2.22.
    559  1.1  mrg 
    560  1.1  mrg    <p>To use GNU <samp><span class="command">as</span></samp>, configure with the options
    561  1.1  mrg <samp><span class="option">--with-gnu-as --with-as=/usr/sfw/bin/gas</span></samp>.  It may be necessary
    562  1.1  mrg to configure with <samp><span class="option">--without-gnu-ld --with-ld=/usr/ccs/bin/ld</span></samp> to
    563  1.1  mrg guarantee use of Sun <samp><span class="command">ld</span></samp>. 
    564  1.1  mrg <!-- FIXME: why -without-gnu-ld -with-ld? -->
    565  1.1  mrg 
    566  1.1  mrg    <p><hr />
    567  1.1  mrg 
    568  1.3  mrg <h3 class="heading"><a name="TOC20"></a><a name="ia64_002dx_002dlinux"></a>ia64-*-linux</h3>
    569  1.1  mrg 
    570  1.1  mrg <p>IA-64 processor (also known as IPF, or Itanium Processor Family)
    571  1.1  mrg running GNU/Linux.
    572  1.1  mrg 
    573  1.1  mrg    <p>If you are using the installed system libunwind library with
    574  1.1  mrg <samp><span class="option">--with-system-libunwind</span></samp>, then you must use libunwind 0.98 or
    575  1.1  mrg later.
    576  1.1  mrg 
    577  1.1  mrg    <p>None of the following versions of GCC has an ABI that is compatible
    578  1.1  mrg with any of the other versions in this list, with the exception that
    579  1.1  mrg Red Hat 2.96 and Trillian 000171 are compatible with each other:
    580  1.1  mrg 3.1, 3.0.2, 3.0.1, 3.0, Red Hat 2.96, and Trillian 000717. 
    581  1.1  mrg This primarily affects C++ programs and programs that create shared libraries. 
    582  1.1  mrg GCC 3.1 or later is recommended for compiling linux, the kernel. 
    583  1.1  mrg As of version 3.1 GCC is believed to be fully ABI compliant, and hence no
    584  1.1  mrg more major ABI changes are expected.
    585  1.1  mrg 
    586  1.1  mrg    <p><hr />
    587  1.1  mrg 
    588  1.3  mrg <h3 class="heading"><a name="TOC21"></a><a name="ia64_002dx_002dhpux"></a>ia64-*-hpux*</h3>
    589  1.1  mrg 
    590  1.1  mrg <p>Building GCC on this target requires the GNU Assembler.  The bundled HP
    591  1.1  mrg assembler will not work.  To prevent GCC from using the wrong assembler,
    592  1.1  mrg the option <samp><span class="option">--with-gnu-as</span></samp> may be necessary.
    593  1.1  mrg 
    594  1.1  mrg    <p>The GCC libunwind library has not been ported to HPUX.  This means that for
    595  1.1  mrg GCC versions 3.2.3 and earlier, <samp><span class="option">--enable-libunwind-exceptions</span></samp>
    596  1.1  mrg is required to build GCC.  For GCC 3.3 and later, this is the default. 
    597  1.1  mrg For gcc 3.4.3 and later, <samp><span class="option">--enable-libunwind-exceptions</span></samp> is
    598  1.1  mrg removed and the system libunwind library will always be used.
    599  1.1  mrg 
    600  1.1  mrg    <p><hr />
    601  1.1  mrg <!-- rs6000-ibm-aix*, powerpc-ibm-aix* -->
    602  1.1  mrg 
    603  1.3  mrg <h3 class="heading"><a name="TOC22"></a><a name="x_002dibm_002daix"></a>*-ibm-aix*</h3>
    604  1.1  mrg 
    605  1.1  mrg <p>Support for AIX version 3 and older was discontinued in GCC 3.4. 
    606  1.1  mrg Support for AIX version 4.2 and older was discontinued in GCC 4.5.
    607  1.1  mrg 
    608  1.1  mrg    <p>&ldquo;out of memory&rdquo; bootstrap failures may indicate a problem with
    609  1.1  mrg process resource limits (ulimit).  Hard limits are configured in the
    610  1.1  mrg <samp><span class="file">/etc/security/limits</span></samp> system configuration file.
    611  1.1  mrg 
    612  1.1  mrg    <p>GCC can bootstrap with recent versions of IBM XLC, but bootstrapping
    613  1.1  mrg with an earlier release of GCC is recommended.  Bootstrapping with XLC
    614  1.1  mrg requires a larger data segment, which can be enabled through the
    615  1.1  mrg <var>LDR_CNTRL</var> environment variable, e.g.,
    616  1.1  mrg 
    617  1.3  mrg <pre class="smallexample">     % LDR_CNTRL=MAXDATA=0x50000000
    618  1.3  mrg      % export LDR_CNTRL
    619  1.1  mrg </pre>
    620  1.1  mrg    <p>One can start with a pre-compiled version of GCC to build from
    621  1.1  mrg sources.  One may delete GCC's &ldquo;fixed&rdquo; header files when starting
    622  1.1  mrg with a version of GCC built for an earlier release of AIX.
    623  1.1  mrg 
    624  1.1  mrg    <p>To speed up the configuration phases of bootstrapping and installing GCC,
    625  1.1  mrg one may use GNU Bash instead of AIX <samp><span class="command">/bin/sh</span></samp>, e.g.,
    626  1.1  mrg 
    627  1.3  mrg <pre class="smallexample">     % CONFIG_SHELL=/opt/freeware/bin/bash
    628  1.3  mrg      % export CONFIG_SHELL
    629  1.1  mrg </pre>
    630  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
    631  1.1  mrg to invoke <var>srcdir</var>/configure.
    632  1.1  mrg 
    633  1.1  mrg    <p>Because GCC on AIX is built as a 32-bit executable by default,
    634  1.1  mrg (although it can generate 64-bit programs) the GMP and MPFR libraries
    635  1.1  mrg required by gfortran must be 32-bit libraries.  Building GMP and MPFR
    636  1.1  mrg as static archive libraries works better than shared libraries.
    637  1.1  mrg 
    638  1.1  mrg    <p>Errors involving <code>alloca</code> when building GCC generally are due
    639  1.1  mrg to an incorrect definition of <code>CC</code> in the Makefile or mixing files
    640  1.1  mrg compiled with the native C compiler and GCC.  During the stage1 phase of
    641  1.1  mrg the build, the native AIX compiler <strong>must</strong> be invoked as <samp><span class="command">cc</span></samp>
    642  1.1  mrg (not <samp><span class="command">xlc</span></samp>).  Once <samp><span class="command">configure</span></samp> has been informed of
    643  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
    644  1.1  mrg configure cache files and ensure that <samp><span class="env">CC</span></samp> environment variable
    645  1.1  mrg does not provide a definition that will confuse <samp><span class="command">configure</span></samp>. 
    646  1.1  mrg If this error occurs during stage2 or later, then the problem most likely
    647  1.1  mrg is the version of Make (see above).
    648  1.1  mrg 
    649  1.3  mrg    <p>The native <samp><span class="command">as</span></samp> and <samp><span class="command">ld</span></samp> are recommended for
    650  1.3  mrg bootstrapping on AIX.  The GNU Assembler, GNU Linker, and GNU
    651  1.3  mrg Binutils version 2.20 is the minimum level that supports bootstrap on
    652  1.3  mrg AIX 5.  The GNU Assembler has not been updated to support AIX 6 or
    653  1.3  mrg AIX 7.  The native AIX tools do interoperate with GCC.
    654  1.3  mrg 
    655  1.3  mrg    <p>AIX 5.3 TL10, AIX 6.1 TL05 and AIX 7.1 TL00 introduced an AIX
    656  1.3  mrg assembler change that sometimes produces corrupt assembly files
    657  1.3  mrg causing AIX linker errors.  The bug breaks GCC bootstrap on AIX and
    658  1.3  mrg can cause compilation failures with existing GCC installations.  An
    659  1.3  mrg AIX iFix for AIX 5.3 is available (APAR IZ98385 for AIX 5.3 TL10, APAR
    660  1.3  mrg IZ98477 for AIX 5.3 TL11 and IZ98134 for AIX 5.3 TL12). AIX 5.3 TL11 SP8,
    661  1.3  mrg AIX 5.3 TL12 SP5, AIX 6.1 TL04 SP11, AIX 6.1 TL05 SP7, AIX 6.1 TL06 SP6,
    662  1.3  mrg AIX 6.1 TL07 and AIX 7.1 TL01 should include the fix.
    663  1.1  mrg 
    664  1.1  mrg    <p>Building <samp><span class="file">libstdc++.a</span></samp> requires a fix for an AIX Assembler bug
    665  1.1  mrg APAR IY26685 (AIX 4.3) or APAR IY25528 (AIX 5.1).  It also requires a
    666  1.1  mrg fix for another AIX Assembler bug and a co-dependent AIX Archiver fix
    667  1.1  mrg referenced as APAR IY53606 (AIX 5.2) or as APAR IY54774 (AIX 5.1)
    668  1.1  mrg 
    669  1.1  mrg    <p>&lsquo;<samp><span class="samp">libstdc++</span></samp>&rsquo; in GCC 3.4 increments the major version number of the
    670  1.1  mrg shared object and GCC installation places the <samp><span class="file">libstdc++.a</span></samp>
    671  1.1  mrg shared library in a common location which will overwrite the and GCC
    672  1.1  mrg 3.3 version of the shared library.  Applications either need to be
    673  1.1  mrg re-linked against the new shared library or the GCC 3.1 and GCC 3.3
    674  1.1  mrg versions of the &lsquo;<samp><span class="samp">libstdc++</span></samp>&rsquo; shared object needs to be available
    675  1.1  mrg to the AIX runtime loader.  The GCC 3.1 &lsquo;<samp><span class="samp">libstdc++.so.4</span></samp>&rsquo;, if
    676  1.1  mrg present, and GCC 3.3 &lsquo;<samp><span class="samp">libstdc++.so.5</span></samp>&rsquo; shared objects can be
    677  1.1  mrg installed for runtime dynamic loading using the following steps to set
    678  1.1  mrg the &lsquo;<samp><span class="samp">F_LOADONLY</span></samp>&rsquo; flag in the shared object for <em>each</em>
    679  1.1  mrg multilib <samp><span class="file">libstdc++.a</span></samp> installed:
    680  1.1  mrg 
    681  1.1  mrg    <p>Extract the shared objects from the currently installed
    682  1.1  mrg <samp><span class="file">libstdc++.a</span></samp> archive:
    683  1.3  mrg <pre class="smallexample">     % ar -x libstdc++.a libstdc++.so.4 libstdc++.so.5
    684  1.1  mrg </pre>
    685  1.1  mrg    <p>Enable the &lsquo;<samp><span class="samp">F_LOADONLY</span></samp>&rsquo; flag so that the shared object will be
    686  1.1  mrg available for runtime dynamic loading, but not linking:
    687  1.3  mrg <pre class="smallexample">     % strip -e libstdc++.so.4 libstdc++.so.5
    688  1.1  mrg </pre>
    689  1.1  mrg    <p>Archive the runtime-only shared object in the GCC 3.4
    690  1.1  mrg <samp><span class="file">libstdc++.a</span></samp> archive:
    691  1.3  mrg <pre class="smallexample">     % ar -q libstdc++.a libstdc++.so.4 libstdc++.so.5
    692  1.1  mrg </pre>
    693  1.1  mrg    <p>Linking executables and shared libraries may produce warnings of
    694  1.1  mrg duplicate symbols.  The assembly files generated by GCC for AIX always
    695  1.1  mrg have included multiple symbol definitions for certain global variable
    696  1.1  mrg and function declarations in the original program.  The warnings should
    697  1.1  mrg not prevent the linker from producing a correct library or runnable
    698  1.1  mrg executable.
    699  1.1  mrg 
    700  1.1  mrg    <p>AIX 4.3 utilizes a &ldquo;large format&rdquo; archive to support both 32-bit and
    701  1.1  mrg 64-bit object modules.  The routines provided in AIX 4.3.0 and AIX 4.3.1
    702  1.1  mrg to parse archive libraries did not handle the new format correctly. 
    703  1.1  mrg These routines are used by GCC and result in error messages during
    704  1.1  mrg linking such as &ldquo;not a COFF file&rdquo;.  The version of the routines shipped
    705  1.1  mrg with AIX 4.3.1 should work for a 32-bit environment.  The <samp><span class="option">-g</span></samp>
    706  1.1  mrg option of the archive command may be used to create archives of 32-bit
    707  1.1  mrg objects using the original &ldquo;small format&rdquo;.  A correct version of the
    708  1.1  mrg routines is shipped with AIX 4.3.2 and above.
    709  1.1  mrg 
    710  1.1  mrg    <p>Some versions of the AIX binder (linker) can fail with a relocation
    711  1.1  mrg overflow severe error when the <samp><span class="option">-bbigtoc</span></samp> option is used to link
    712  1.1  mrg GCC-produced object files into an executable that overflows the TOC.  A fix
    713  1.1  mrg for APAR IX75823 (OVERFLOW DURING LINK WHEN USING GCC AND -BBIGTOC) is
    714  1.1  mrg available from IBM Customer Support and from its
    715  1.1  mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
    716  1.1  mrg website as PTF U455193.
    717  1.1  mrg 
    718  1.1  mrg    <p>The AIX 4.3.2.1 linker (bos.rte.bind_cmds Level 4.3.2.1) will dump core
    719  1.1  mrg with a segmentation fault when invoked by any version of GCC.  A fix for
    720  1.1  mrg APAR IX87327 is available from IBM Customer Support and from its
    721  1.1  mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
    722  1.1  mrg website as PTF U461879.  This fix is incorporated in AIX 4.3.3 and above.
    723  1.1  mrg 
    724  1.1  mrg    <p>The initial assembler shipped with AIX 4.3.0 generates incorrect object
    725  1.1  mrg files.  A fix for APAR IX74254 (64BIT DISASSEMBLED OUTPUT FROM COMPILER FAILS
    726  1.1  mrg TO ASSEMBLE/BIND) is available from IBM Customer Support and from its
    727  1.1  mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
    728  1.1  mrg website as PTF U453956.  This fix is incorporated in AIX 4.3.1 and above.
    729  1.1  mrg 
    730  1.1  mrg    <p>AIX provides National Language Support (NLS).  Compilers and assemblers
    731  1.1  mrg use NLS to support locale-specific representations of various data
    732  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
    733  1.1  mrg separating decimal fractions).  There have been problems reported where
    734  1.1  mrg GCC does not produce the same floating-point formats that the assembler
    735  1.1  mrg expects.  If one encounters this problem, set the <samp><span class="env">LANG</span></samp>
    736  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;.
    737  1.1  mrg 
    738  1.1  mrg    <p>A default can be specified with the <samp><span class="option">-mcpu=</span><var>cpu_type</var></samp>
    739  1.1  mrg switch and using the configure option <samp><span class="option">--with-cpu-</span><var>cpu_type</var></samp>.
    740  1.1  mrg 
    741  1.1  mrg    <p><hr />
    742  1.1  mrg 
    743  1.3  mrg <h3 class="heading"><a name="TOC23"></a><a name="iq2000_002dx_002delf"></a>iq2000-*-elf</h3>
    744  1.1  mrg 
    745  1.1  mrg <p>Vitesse IQ2000 processors.  These are used in embedded
    746  1.1  mrg applications.  There are no standard Unix configurations.
    747  1.1  mrg 
    748  1.1  mrg    <p><hr />
    749  1.1  mrg 
    750  1.3  mrg <h3 class="heading"><a name="TOC24"></a><a name="lm32_002dx_002delf"></a>lm32-*-elf</h3>
    751  1.1  mrg 
    752  1.1  mrg <p>Lattice Mico32 processor. 
    753  1.1  mrg This configuration is intended for embedded systems.
    754  1.1  mrg 
    755  1.1  mrg    <p><hr />
    756  1.1  mrg 
    757  1.3  mrg <h3 class="heading"><a name="TOC25"></a><a name="lm32_002dx_002duclinux"></a>lm32-*-uclinux</h3>
    758  1.1  mrg 
    759  1.1  mrg <p>Lattice Mico32 processor. 
    760  1.1  mrg This configuration is intended for embedded systems running uClinux.
    761  1.1  mrg 
    762  1.1  mrg    <p><hr />
    763  1.1  mrg 
    764  1.3  mrg <h3 class="heading"><a name="TOC26"></a><a name="m32c_002dx_002delf"></a>m32c-*-elf</h3>
    765  1.1  mrg 
    766  1.1  mrg <p>Renesas M32C processor. 
    767  1.1  mrg This configuration is intended for embedded systems.
    768  1.1  mrg 
    769  1.1  mrg    <p><hr />
    770  1.1  mrg 
    771  1.3  mrg <h3 class="heading"><a name="TOC27"></a><a name="m32r_002dx_002delf"></a>m32r-*-elf</h3>
    772  1.1  mrg 
    773  1.1  mrg <p>Renesas M32R processor. 
    774  1.1  mrg This configuration is intended for embedded systems.
    775  1.1  mrg 
    776  1.1  mrg    <p><hr />
    777  1.1  mrg 
    778  1.1  mrg <h3 class="heading"><a name="TOC28"></a><a name="m68k_002dx_002dx"></a>m68k-*-*</h3>
    779  1.1  mrg 
    780  1.1  mrg <p>By default,
    781  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
    782  1.1  mrg &lsquo;<samp><span class="samp">m68k-*-linux</span></samp>&rsquo;
    783  1.1  mrg build libraries for both M680x0 and ColdFire processors.  If you only
    784  1.1  mrg need the M680x0 libraries, you can omit the ColdFire ones by passing
    785  1.1  mrg <samp><span class="option">--with-arch=m68k</span></samp> to <samp><span class="command">configure</span></samp>.  Alternatively, you
    786  1.1  mrg can omit the M680x0 libraries by passing <samp><span class="option">--with-arch=cf</span></samp> to
    787  1.1  mrg <samp><span class="command">configure</span></samp>.  These targets default to 5206 or 5475 code as
    788  1.1  mrg appropriate for the target system when
    789  1.1  mrg configured with <samp><span class="option">--with-arch=cf</span></samp> and 68020 code otherwise.
    790  1.1  mrg 
    791  1.1  mrg    <p>The &lsquo;<samp><span class="samp">m68k-*-netbsd</span></samp>&rsquo; and
    792  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>
    793  1.1  mrg option.  They will generate ColdFire CFV4e code when configured with
    794  1.1  mrg <samp><span class="option">--with-arch=cf</span></samp> and 68020 code otherwise.
    795  1.1  mrg 
    796  1.1  mrg    <p>You can override the default processors listed above by configuring
    797  1.1  mrg with <samp><span class="option">--with-cpu=</span><var>target</var></samp>.  This <var>target</var> can either
    798  1.1  mrg be a <samp><span class="option">-mcpu</span></samp> argument or one of the following values:
    799  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;,
    800  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;.
    801  1.1  mrg 
    802  1.3  mrg    <p>GCC requires at least binutils version 2.17 on these targets.
    803  1.3  mrg 
    804  1.1  mrg    <p><hr />
    805  1.1  mrg 
    806  1.1  mrg <h3 class="heading"><a name="TOC29"></a><a name="m68k_002dx_002duclinux"></a>m68k-*-uclinux</h3>
    807  1.1  mrg 
    808  1.1  mrg <p>GCC 4.3 changed the uClinux configuration so that it uses the
    809  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. 
    810  1.1  mrg It also added improved support for C++ and flat shared libraries,
    811  1.3  mrg both of which were ABI changes.
    812  1.1  mrg 
    813  1.1  mrg    <p><hr />
    814  1.1  mrg 
    815  1.1  mrg <h3 class="heading"><a name="TOC30"></a><a name="mep_002dx_002delf"></a>mep-*-elf</h3>
    816  1.1  mrg 
    817  1.1  mrg <p>Toshiba Media embedded Processor. 
    818  1.1  mrg This configuration is intended for embedded systems.
    819  1.1  mrg 
    820  1.1  mrg    <p><hr />
    821  1.1  mrg 
    822  1.3  mrg <h3 class="heading"><a name="TOC31"></a><a name="microblaze_002dx_002delf"></a>microblaze-*-elf</h3>
    823  1.3  mrg 
    824  1.3  mrg <p>Xilinx MicroBlaze processor. 
    825  1.3  mrg This configuration is intended for embedded systems.
    826  1.3  mrg 
    827  1.3  mrg    <p><hr />
    828  1.3  mrg 
    829  1.3  mrg <h3 class="heading"><a name="TOC32"></a><a name="mips_002dx_002dx"></a>mips-*-*</h3>
    830  1.1  mrg 
    831  1.1  mrg <p>If on a MIPS system you get an error message saying &ldquo;does not have gp
    832  1.1  mrg sections for all it's [sic] sectons [sic]&rdquo;, don't worry about it.  This
    833  1.1  mrg happens whenever you use GAS with the MIPS linker, but there is not
    834  1.1  mrg really anything wrong, and it is okay to use the output file.  You can
    835  1.1  mrg stop such warnings by installing the GNU linker.
    836  1.1  mrg 
    837  1.1  mrg    <p>It would be nice to extend GAS to produce the gp tables, but they are
    838  1.1  mrg optional, and there should not be a warning about their absence.
    839  1.1  mrg 
    840  1.1  mrg    <p>The libstdc++ atomic locking routines for MIPS targets requires MIPS II
    841  1.1  mrg and later.  A patch went in just after the GCC 3.3 release to
    842  1.1  mrg make &lsquo;<samp><span class="samp">mips*-*-*</span></samp>&rsquo; use the generic implementation instead.  You can also
    843  1.1  mrg configure for &lsquo;<samp><span class="samp">mipsel-elf</span></samp>&rsquo; as a workaround.  The
    844  1.1  mrg &lsquo;<samp><span class="samp">mips*-*-linux*</span></samp>&rsquo; target continues to use the MIPS II routines.  More
    845  1.1  mrg work on this is expected in future releases.
    846  1.1  mrg 
    847  1.1  mrg <!-- If you make -with-llsc the default for another target, please also -->
    848  1.1  mrg <!-- update the description of the -with-llsc option. -->
    849  1.1  mrg    <p>The built-in <code>__sync_*</code> functions are available on MIPS II and
    850  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
    851  1.1  mrg &lsquo;<samp><span class="samp">sync</span></samp>&rsquo; instructions.  This can be overridden by passing
    852  1.1  mrg <samp><span class="option">--with-llsc</span></samp> or <samp><span class="option">--without-llsc</span></samp> when configuring GCC. 
    853  1.1  mrg Since the Linux kernel emulates these instructions if they are
    854  1.1  mrg missing, the default for &lsquo;<samp><span class="samp">mips*-*-linux*</span></samp>&rsquo; targets is
    855  1.1  mrg <samp><span class="option">--with-llsc</span></samp>.  The <samp><span class="option">--with-llsc</span></samp> and
    856  1.1  mrg <samp><span class="option">--without-llsc</span></samp> configure options may be overridden at compile
    857  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
    858  1.1  mrg the compiler.
    859  1.1  mrg 
    860  1.1  mrg    <p>MIPS systems check for division by zero (unless
    861  1.1  mrg <samp><span class="option">-mno-check-zero-division</span></samp> is passed to the compiler) by
    862  1.1  mrg generating either a conditional trap or a break instruction.  Using
    863  1.1  mrg trap results in smaller code, but is only supported on MIPS II and
    864  1.1  mrg later.  Also, some versions of the Linux kernel have a bug that
    865  1.1  mrg prevents trap from generating the proper signal (<code>SIGFPE</code>).  To enable
    866  1.1  mrg the use of break, use the <samp><span class="option">--with-divide=breaks</span></samp>
    867  1.1  mrg <samp><span class="command">configure</span></samp> option when configuring GCC.  The default is to
    868  1.1  mrg use traps on systems that support them.
    869  1.1  mrg 
    870  1.1  mrg    <p>The assembler from GNU binutils 2.17 and earlier has a bug in the way
    871  1.1  mrg it sorts relocations for REL targets (o32, o64, EABI).  This can cause
    872  1.1  mrg bad code to be generated for simple C++ programs.  Also the linker
    873  1.1  mrg from GNU binutils versions prior to 2.17 has a bug which causes the
    874  1.1  mrg runtime linker stubs in very large programs, like <samp><span class="file">libgcj.so</span></samp>, to
    875  1.1  mrg be incorrectly generated.  GNU Binutils 2.18 and later (and snapshots
    876  1.1  mrg made after Nov. 9, 2006) should be free from both of these problems.
    877  1.1  mrg 
    878  1.1  mrg    <p><hr />
    879  1.1  mrg 
    880  1.3  mrg <h3 class="heading"><a name="TOC33"></a><a name="mips_002dsgi_002dirix5"></a>mips-sgi-irix5</h3>
    881  1.1  mrg 
    882  1.3  mrg <p>Support for IRIX 5 has been removed in GCC 4.6.
    883  1.1  mrg 
    884  1.1  mrg    <p><hr />
    885  1.1  mrg 
    886  1.3  mrg <h3 class="heading"><a name="TOC34"></a><a name="mips_002dsgi_002dirix6"></a>mips-sgi-irix6</h3>
    887  1.1  mrg 
    888  1.3  mrg <p>Support for IRIX 6.5 has been removed in GCC 4.8.  Support for IRIX 6
    889  1.3  mrg releases before 6.5 has been removed in GCC 4.6, as well as support for
    890  1.3  mrg the O32 ABI.
    891  1.1  mrg 
    892  1.1  mrg    <p><hr />
    893  1.1  mrg 
    894  1.3  mrg <h3 class="heading"><a name="TOC35"></a><a name="moxie_002dx_002delf"></a>moxie-*-elf</h3>
    895  1.1  mrg 
    896  1.3  mrg <p>The moxie processor.
    897  1.1  mrg 
    898  1.1  mrg    <p><hr />
    899  1.1  mrg 
    900  1.3  mrg <h3 class="heading"><a name="TOC36"></a><a name="powerpc_002dx_002dx"></a>powerpc-*-*</h3>
    901  1.1  mrg 
    902  1.1  mrg <p>You can specify a default version for the <samp><span class="option">-mcpu=</span><var>cpu_type</var></samp>
    903  1.1  mrg switch by using the configure option <samp><span class="option">--with-cpu-</span><var>cpu_type</var></samp>.
    904  1.1  mrg 
    905  1.1  mrg    <p>You will need
    906  1.1  mrg <a href="ftp://ftp.kernel.org/pub/linux/devel/binutils">binutils 2.15</a>
    907  1.1  mrg or newer for a working GCC.
    908  1.1  mrg 
    909  1.1  mrg    <p><hr />
    910  1.1  mrg 
    911  1.3  mrg <h3 class="heading"><a name="TOC37"></a><a name="powerpc_002dx_002ddarwin"></a>powerpc-*-darwin*</h3>
    912  1.1  mrg 
    913  1.1  mrg <p>PowerPC running Darwin (Mac OS X kernel).
    914  1.1  mrg 
    915  1.1  mrg    <p>Pre-installed versions of Mac OS X may not include any developer tools,
    916  1.1  mrg meaning that you will not be able to build GCC from source.  Tool
    917  1.1  mrg binaries are available at
    918  1.3  mrg <a href="http://opensource.apple.com/">http://opensource.apple.com/</a>.
    919  1.1  mrg 
    920  1.1  mrg    <p>This version of GCC requires at least cctools-590.36.  The
    921  1.1  mrg cctools-590.36 package referenced from
    922  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
    923  1.1  mrg on systems older than 10.3.9 (aka darwin7.9.0).
    924  1.1  mrg 
    925  1.1  mrg    <p><hr />
    926  1.1  mrg 
    927  1.3  mrg <h3 class="heading"><a name="TOC38"></a><a name="powerpc_002dx_002delf"></a>powerpc-*-elf</h3>
    928  1.1  mrg 
    929  1.1  mrg <p>PowerPC system in big endian mode, running System V.4.
    930  1.1  mrg 
    931  1.1  mrg    <p><hr />
    932  1.1  mrg 
    933  1.3  mrg <h3 class="heading"><a name="TOC39"></a><a name="powerpc_002dx_002dlinux_002dgnu"></a>powerpc*-*-linux-gnu*</h3>
    934  1.1  mrg 
    935  1.1  mrg <p>PowerPC system in big endian mode running Linux.
    936  1.1  mrg 
    937  1.1  mrg    <p><hr />
    938  1.1  mrg 
    939  1.3  mrg <h3 class="heading"><a name="TOC40"></a><a name="powerpc_002dx_002dnetbsd"></a>powerpc-*-netbsd*</h3>
    940  1.1  mrg 
    941  1.1  mrg <p>PowerPC system in big endian mode running NetBSD.
    942  1.1  mrg 
    943  1.1  mrg    <p><hr />
    944  1.1  mrg 
    945  1.3  mrg <h3 class="heading"><a name="TOC41"></a><a name="powerpc_002dx_002deabisim"></a>powerpc-*-eabisim</h3>
    946  1.1  mrg 
    947  1.1  mrg <p>Embedded PowerPC system in big endian mode for use in running under the
    948  1.1  mrg PSIM simulator.
    949  1.1  mrg 
    950  1.1  mrg    <p><hr />
    951  1.1  mrg 
    952  1.3  mrg <h3 class="heading"><a name="TOC42"></a><a name="powerpc_002dx_002deabi"></a>powerpc-*-eabi</h3>
    953  1.1  mrg 
    954  1.1  mrg <p>Embedded PowerPC system in big endian mode.
    955  1.1  mrg 
    956  1.1  mrg    <p><hr />
    957  1.1  mrg 
    958  1.3  mrg <h3 class="heading"><a name="TOC43"></a><a name="powerpcle_002dx_002delf"></a>powerpcle-*-elf</h3>
    959  1.1  mrg 
    960  1.1  mrg <p>PowerPC system in little endian mode, running System V.4.
    961  1.1  mrg 
    962  1.1  mrg    <p><hr />
    963  1.1  mrg 
    964  1.3  mrg <h3 class="heading"><a name="TOC44"></a><a name="powerpcle_002dx_002deabisim"></a>powerpcle-*-eabisim</h3>
    965  1.1  mrg 
    966  1.1  mrg <p>Embedded PowerPC system in little endian mode for use in running under
    967  1.1  mrg the PSIM simulator.
    968  1.1  mrg 
    969  1.1  mrg    <p><hr />
    970  1.1  mrg 
    971  1.3  mrg <h3 class="heading"><a name="TOC45"></a><a name="powerpcle_002dx_002deabi"></a>powerpcle-*-eabi</h3>
    972  1.1  mrg 
    973  1.1  mrg <p>Embedded PowerPC system in little endian mode.
    974  1.1  mrg 
    975  1.1  mrg    <p><hr />
    976  1.1  mrg 
    977  1.3  mrg <h3 class="heading"><a name="TOC46"></a><a name="rl78_002dx_002delf"></a>rl78-*-elf</h3>
    978  1.3  mrg 
    979  1.3  mrg <p>The Renesas RL78 processor. 
    980  1.3  mrg This configuration is intended for embedded systems.
    981  1.3  mrg 
    982  1.3  mrg    <p><hr />
    983  1.3  mrg 
    984  1.3  mrg <h3 class="heading"><a name="TOC47"></a><a name="rx_002dx_002delf"></a>rx-*-elf</h3>
    985  1.1  mrg 
    986  1.1  mrg <p>The Renesas RX processor.  See
    987  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>
    988  1.1  mrg for more information about this processor.
    989  1.1  mrg 
    990  1.1  mrg    <p><hr />
    991  1.1  mrg 
    992  1.3  mrg <h3 class="heading"><a name="TOC48"></a><a name="s390_002dx_002dlinux"></a>s390-*-linux*</h3>
    993  1.1  mrg 
    994  1.1  mrg <p>S/390 system running GNU/Linux for S/390.
    995  1.1  mrg 
    996  1.1  mrg    <p><hr />
    997  1.1  mrg 
    998  1.3  mrg <h3 class="heading"><a name="TOC49"></a><a name="s390x_002dx_002dlinux"></a>s390x-*-linux*</h3>
    999  1.1  mrg 
   1000  1.1  mrg <p>zSeries system (64-bit) running GNU/Linux for zSeries.
   1001  1.1  mrg 
   1002  1.1  mrg    <p><hr />
   1003  1.1  mrg 
   1004  1.3  mrg <h3 class="heading"><a name="TOC50"></a><a name="s390x_002dibm_002dtpf"></a>s390x-ibm-tpf*</h3>
   1005  1.1  mrg 
   1006  1.1  mrg <p>zSeries system (64-bit) running TPF.  This platform is
   1007  1.1  mrg supported as cross-compilation target only.
   1008  1.1  mrg 
   1009  1.1  mrg    <p><hr /><!-- Please use Solaris 2 to refer to all release of Solaris, starting -->
   1010  1.1  mrg <!-- with 2.0 until 2.6, 7, 8, etc.  Solaris 1 was a marketing name for -->
   1011  1.1  mrg <!-- SunOS 4 releases which we don't use to avoid confusion.  Solaris -->
   1012  1.1  mrg <!-- alone is too unspecific and must be avoided. -->
   1013  1.1  mrg 
   1014  1.3  mrg <h3 class="heading"><a name="TOC51"></a><a name="x_002dx_002dsolaris2"></a>*-*-solaris2*</h3>
   1015  1.3  mrg 
   1016  1.3  mrg <p>Support for Solaris 8 has removed in GCC 4.8.  Support for Solaris 7 has
   1017  1.3  mrg been removed in GCC 4.6.
   1018  1.1  mrg 
   1019  1.3  mrg    <p>Sun does not ship a C compiler with Solaris 2 before Solaris 10, though
   1020  1.3  mrg you can download the Sun Studio compilers for free.  In Solaris 10 and
   1021  1.3  mrg 11, GCC 3.4.3 is available as <samp><span class="command">/usr/sfw/bin/gcc</span></samp>.  Solaris 11
   1022  1.3  mrg also provides GCC 4.5.2 as <samp><span class="command">/usr/gcc/4.5/bin/gcc</span></samp>.  Alternatively,
   1023  1.1  mrg you can install a pre-built GCC to bootstrap and install GCC.  See the
   1024  1.1  mrg <a href="binaries.html">binaries page</a> for details.
   1025  1.1  mrg 
   1026  1.1  mrg    <p>The Solaris 2 <samp><span class="command">/bin/sh</span></samp> will often fail to configure
   1027  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
   1028  1.1  mrg recommend using the following initial sequence of commands
   1029  1.1  mrg 
   1030  1.3  mrg <pre class="smallexample">     % CONFIG_SHELL=/bin/ksh
   1031  1.3  mrg      % export CONFIG_SHELL
   1032  1.1  mrg </pre>
   1033  1.1  mrg    <p class="noindent">and proceed as described in <a href="configure.html">the configure instructions</a>. 
   1034  1.1  mrg In addition we strongly recommend specifying an absolute path to invoke
   1035  1.1  mrg <samp><var>srcdir</var><span class="command">/configure</span></samp>.
   1036  1.1  mrg 
   1037  1.1  mrg    <p>Solaris 2 comes with a number of optional OS packages.  Some of these
   1038  1.1  mrg are needed to use GCC fully, namely <code>SUNWarc</code>,
   1039  1.1  mrg <code>SUNWbtool</code>, <code>SUNWesu</code>, <code>SUNWhea</code>, <code>SUNWlibm</code>,
   1040  1.1  mrg <code>SUNWsprot</code>, and <code>SUNWtoo</code>.  If you did not install all
   1041  1.1  mrg optional packages when installing Solaris 2, you will need to verify that
   1042  1.1  mrg the packages that GCC needs are installed.
   1043  1.1  mrg 
   1044  1.1  mrg    <p>To check whether an optional package is installed, use
   1045  1.1  mrg the <samp><span class="command">pkginfo</span></samp> command.  To add an optional package, use the
   1046  1.1  mrg <samp><span class="command">pkgadd</span></samp> command.  For further details, see the Solaris 2
   1047  1.1  mrg documentation.
   1048  1.1  mrg 
   1049  1.1  mrg    <p>Trying to use the linker and other tools in
   1050  1.1  mrg <samp><span class="file">/usr/ucb</span></samp> to install GCC has been observed to cause trouble. 
   1051  1.1  mrg For example, the linker may hang indefinitely.  The fix is to remove
   1052  1.1  mrg <samp><span class="file">/usr/ucb</span></samp> from your <samp><span class="env">PATH</span></samp>.
   1053  1.1  mrg 
   1054  1.1  mrg    <p>The build process works more smoothly with the legacy Sun tools so, if you
   1055  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
   1056  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.
   1057  1.1  mrg 
   1058  1.1  mrg    <p>We recommend the use of the Sun assembler or the GNU assembler, in
   1059  1.1  mrg conjunction with the Sun linker.  The GNU <samp><span class="command">as</span></samp>
   1060  1.1  mrg versions included in Solaris 10, from GNU binutils 2.15, and Solaris 11,
   1061  1.1  mrg from GNU binutils 2.19, are known to work.  They can be found in
   1062  1.3  mrg <samp><span class="file">/usr/sfw/bin/gas</span></samp>.  Current versions of GNU binutils (2.22)
   1063  1.1  mrg are known to work as well.  Note that your mileage may vary
   1064  1.1  mrg if you use a combination of the GNU tools and the Sun tools: while the
   1065  1.1  mrg combination GNU <samp><span class="command">as</span></samp> + Sun <samp><span class="command">ld</span></samp> should reasonably work,
   1066  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
   1067  1.3  mrg build or cause memory corruption at runtime in some cases for C++ programs. 
   1068  1.1  mrg <!-- FIXME: still? -->
   1069  1.1  mrg GNU <samp><span class="command">ld</span></samp> usually works as well, although the version included in
   1070  1.1  mrg Solaris 10 cannot be used due to several bugs.  Again, the current
   1071  1.3  mrg version (2.22) is known to work, but generally lacks platform specific
   1072  1.3  mrg features, so better stay with Sun <samp><span class="command">ld</span></samp>.  To use the LTO linker
   1073  1.3  mrg plugin (<samp><span class="option">-fuse-linker-plugin</span></samp>) with GNU <samp><span class="command">ld</span></samp>, GNU
   1074  1.3  mrg binutils <em>must</em> be configured with <samp><span class="option">--enable-largefile</span></samp>.
   1075  1.3  mrg 
   1076  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>,
   1077  1.3  mrg you need to have any version of GNU <samp><span class="command">c++filt</span></samp>, which is part of
   1078  1.3  mrg GNU binutils.  &lsquo;<samp><span class="samp">libstdc++</span></samp>&rsquo; symbol versioning will be disabled if no
   1079  1.3  mrg appropriate version is found.  Sun <samp><span class="command">c++filt</span></samp> from the Sun Studio
   1080  1.3  mrg compilers does <em>not</em> work.
   1081  1.1  mrg 
   1082  1.1  mrg    <p>Sun bug 4296832 turns up when compiling X11 headers with GCC 2.95 or
   1083  1.1  mrg newer: <samp><span class="command">g++</span></samp> will complain that types are missing.  These headers
   1084  1.1  mrg assume that omitting the type means <code>int</code>; this assumption worked for
   1085  1.1  mrg C90 but is wrong for C++, and is now wrong for C99 also.
   1086  1.1  mrg 
   1087  1.1  mrg    <p>Sun bug 4927647 sometimes causes random spurious testsuite failures
   1088  1.1  mrg related to missing diagnostic output.  This bug doesn't affect GCC
   1089  1.1  mrg itself, rather it is a kernel bug triggered by the <samp><span class="command">expect</span></samp>
   1090  1.1  mrg program which is used only by the GCC testsuite driver.  When the bug
   1091  1.1  mrg causes the <samp><span class="command">expect</span></samp> program to miss anticipated output, extra
   1092  1.1  mrg testsuite failures appear.
   1093  1.1  mrg 
   1094  1.3  mrg    <p>There are patches for Solaris 9 (117171-11 or newer for
   1095  1.1  mrg SPARC, 117172-11 or newer for Intel) that address this problem.
   1096  1.1  mrg 
   1097  1.3  mrg    <p>Thread-local storage (TLS) is supported in Solaris&nbsp;9, but requires
   1098  1.3  mrg some patches.  The &lsquo;<samp><span class="samp">libthread</span></samp>&rsquo; patches provide the
   1099  1.3  mrg <code>__tls_get_addr</code> (SPARC, 64-bit x86) resp. <code>___tls_get_addr</code>
   1100  1.3  mrg (32-bit x86) functions.  On Solaris&nbsp;9, the necessary support
   1101  1.3  mrg on SPARC is present since FCS, while 114432-05 or newer is required on
   1102  1.3  mrg Intel.  Additionally, on Solaris&nbsp;9/x86, patch 113986-02 or newer is
   1103  1.3  mrg required for the Sun <samp><span class="command">ld</span></samp> and runtime linker (<samp><span class="command">ld.so.1</span></samp>)
   1104  1.3  mrg support, while Solaris&nbsp;9/SPARC works since FCS.  The linker
   1105  1.3  mrg patches must be installed even if GNU <samp><span class="command">ld</span></samp> is used. Sun
   1106  1.3  mrg <samp><span class="command">as</span></samp> in Solaris&nbsp;9 doesn't support the necessary
   1107  1.3  mrg relocations, so GNU <samp><span class="command">as</span></samp> must be used.  The <samp><span class="command">configure</span></samp>
   1108  1.3  mrg script checks for those prerequisites and automatically enables TLS
   1109  1.3  mrg support if they are met.  Although those minimal patch versions should
   1110  1.3  mrg work, it is recommended to use the latest patch versions which include
   1111  1.3  mrg additional bug fixes.
   1112  1.3  mrg 
   1113  1.3  mrg    <p><hr />
   1114  1.3  mrg 
   1115  1.3  mrg <h3 class="heading"><a name="TOC52"></a><a name="sparc_002dx_002dx"></a>sparc*-*-*</h3>
   1116  1.3  mrg 
   1117  1.3  mrg <p>This section contains general configuration information for all
   1118  1.3  mrg SPARC-based platforms.  In addition to reading this section, please
   1119  1.3  mrg read all other sections that match your target.
   1120  1.3  mrg 
   1121  1.3  mrg    <p>Newer versions of the GNU Multiple Precision Library (GMP), the MPFR
   1122  1.3  mrg library and the MPC library are known to be miscompiled by earlier
   1123  1.3  mrg versions of GCC on these platforms.  We therefore recommend the use
   1124  1.3  mrg of the exact versions of these libraries listed as minimal versions
   1125  1.3  mrg in <a href="prerequisites.html">the prerequisites</a>.
   1126  1.3  mrg 
   1127  1.1  mrg    <p><hr />
   1128  1.1  mrg 
   1129  1.3  mrg <h3 class="heading"><a name="TOC53"></a><a name="sparc_002dsun_002dsolaris2"></a>sparc-sun-solaris2*</h3>
   1130  1.1  mrg 
   1131  1.1  mrg <p>When GCC is configured to use GNU binutils 2.14 or later, the binaries
   1132  1.1  mrg produced are smaller than the ones produced using Sun's native tools;
   1133  1.1  mrg this difference is quite significant for binaries containing debugging
   1134  1.1  mrg information.
   1135  1.1  mrg 
   1136  1.1  mrg    <p>Starting with Solaris 7, the operating system is capable of executing
   1137  1.1  mrg 64-bit SPARC V9 binaries.  GCC 3.1 and later properly supports
   1138  1.1  mrg this; the <samp><span class="option">-m64</span></samp> option enables 64-bit code generation. 
   1139  1.1  mrg However, if all you want is code tuned for the UltraSPARC CPU, you
   1140  1.1  mrg should try the <samp><span class="option">-mtune=ultrasparc</span></samp> option instead, which produces
   1141  1.1  mrg code that, unlike full 64-bit code, can still run on non-UltraSPARC
   1142  1.1  mrg machines.
   1143  1.1  mrg 
   1144  1.1  mrg    <p>When configuring on a Solaris 7 or later system that is running a kernel
   1145  1.1  mrg that supports only 32-bit binaries, one must configure with
   1146  1.1  mrg <samp><span class="option">--disable-multilib</span></samp>, since we will not be able to build the
   1147  1.1  mrg 64-bit target libraries.
   1148  1.1  mrg 
   1149  1.1  mrg    <p>GCC 3.3 and GCC 3.4 trigger code generation bugs in earlier versions of
   1150  1.1  mrg the GNU compiler (especially GCC 3.0.x versions), which lead to the
   1151  1.1  mrg miscompilation of the stage1 compiler and the subsequent failure of the
   1152  1.1  mrg bootstrap process.  A workaround is to use GCC 3.2.3 as an intermediary
   1153  1.1  mrg stage, i.e. to bootstrap that compiler with the base compiler and then
   1154  1.1  mrg use it to bootstrap the final compiler.
   1155  1.1  mrg 
   1156  1.1  mrg    <p>GCC 3.4 triggers a code generation bug in versions 5.4 (Sun ONE Studio 7)
   1157  1.1  mrg and 5.5 (Sun ONE Studio 8) of the Sun compiler, which causes a bootstrap
   1158  1.1  mrg failure in form of a miscompilation of the stage1 compiler by the Sun
   1159  1.1  mrg compiler.  This is Sun bug 4974440.  This is fixed with patch 112760-07.
   1160  1.1  mrg 
   1161  1.1  mrg    <p>GCC 3.4 changed the default debugging format from Stabs to DWARF-2 for
   1162  1.1  mrg 32-bit code on Solaris 7 and later.  If you use the Sun assembler, this
   1163  1.1  mrg change apparently runs afoul of Sun bug 4910101 (which is referenced as
   1164  1.1  mrg an x86-only problem by Sun, probably because they do not use DWARF-2). 
   1165  1.1  mrg A symptom of the problem is that you cannot compile C++ programs like
   1166  1.1  mrg <samp><span class="command">groff</span></samp> 1.19.1 without getting messages similar to the following:
   1167  1.1  mrg 
   1168  1.1  mrg <pre class="smallexample">     ld: warning: relocation error: R_SPARC_UA32: ...
   1169  1.1  mrg        external symbolic relocation against non-allocatable section
   1170  1.1  mrg        .debug_info cannot be processed at runtime: relocation ignored.
   1171  1.1  mrg </pre>
   1172  1.1  mrg    <p class="noindent">To work around this problem, compile with <samp><span class="option">-gstabs+</span></samp> instead of
   1173  1.1  mrg plain <samp><span class="option">-g</span></samp>.
   1174  1.1  mrg 
   1175  1.3  mrg    <p>When configuring the GNU Multiple Precision Library (GMP), the MPFR
   1176  1.3  mrg library or the MPC library on a Solaris 7 or later system, the canonical
   1177  1.3  mrg target triplet must be specified as the <samp><span class="command">build</span></samp> parameter on the
   1178  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
   1179  1.3  mrg not that of GMP or MPFR or MPC).  For example on a Solaris 9 system:
   1180  1.1  mrg 
   1181  1.3  mrg <pre class="smallexample">     % ./configure --build=sparc-sun-solaris2.9 --prefix=xxx
   1182  1.1  mrg </pre>
   1183  1.1  mrg    <p><hr />
   1184  1.1  mrg 
   1185  1.3  mrg <h3 class="heading"><a name="TOC54"></a><a name="sparc_002dsun_002dsolaris210"></a>sparc-sun-solaris2.10</h3>
   1186  1.1  mrg 
   1187  1.1  mrg <p>There is a bug in older versions of the Sun assembler which breaks
   1188  1.1  mrg thread-local storage (TLS).  A typical error message is
   1189  1.1  mrg 
   1190  1.1  mrg <pre class="smallexample">     ld: fatal: relocation error: R_SPARC_TLS_LE_HIX22: file /var/tmp//ccamPA1v.o:
   1191  1.1  mrg        symbol &lt;unknown&gt;: bad symbol type SECT: symbol type must be TLS
   1192  1.1  mrg </pre>
   1193  1.1  mrg    <p class="noindent">This bug is fixed in Sun patch 118683-03 or later.
   1194  1.1  mrg 
   1195  1.1  mrg    <p><hr />
   1196  1.1  mrg 
   1197  1.3  mrg <h3 class="heading"><a name="TOC55"></a><a name="sparc_002dx_002dlinux"></a>sparc-*-linux*</h3>
   1198  1.1  mrg 
   1199  1.1  mrg <p>GCC versions 3.0 and higher require binutils 2.11.2 and glibc 2.2.4
   1200  1.1  mrg or newer on this platform.  All earlier binutils and glibc
   1201  1.1  mrg releases mishandled unaligned relocations on <code>sparc-*-*</code> targets.
   1202  1.1  mrg 
   1203  1.1  mrg    <p><hr />
   1204  1.1  mrg 
   1205  1.3  mrg <h3 class="heading"><a name="TOC56"></a><a name="sparc64_002dx_002dsolaris2"></a>sparc64-*-solaris2*</h3>
   1206  1.1  mrg 
   1207  1.3  mrg <p>When configuring the GNU Multiple Precision Library (GMP), the MPFR
   1208  1.3  mrg library or the MPC library, the canonical target triplet must be specified
   1209  1.3  mrg as the <samp><span class="command">build</span></samp> parameter on the configure line.  For example
   1210  1.3  mrg on a Solaris 9 system:
   1211  1.1  mrg 
   1212  1.3  mrg <pre class="smallexample">     % ./configure --build=sparc64-sun-solaris2.9 --prefix=xxx
   1213  1.1  mrg </pre>
   1214  1.1  mrg    <p>The following compiler flags must be specified in the configure
   1215  1.1  mrg step in order to bootstrap this target with the Sun compiler:
   1216  1.1  mrg 
   1217  1.3  mrg <pre class="smallexample">     % CC="cc -xarch=v9 -xildoff" <var>srcdir</var>/configure [<var>options</var>] [<var>target</var>]
   1218  1.1  mrg </pre>
   1219  1.1  mrg    <p class="noindent"><samp><span class="option">-xarch=v9</span></samp> specifies the SPARC-V9 architecture to the Sun toolchain
   1220  1.1  mrg and <samp><span class="option">-xildoff</span></samp> turns off the incremental linker.
   1221  1.1  mrg 
   1222  1.1  mrg    <p><hr />
   1223  1.1  mrg 
   1224  1.3  mrg <h3 class="heading"><a name="TOC57"></a><a name="sparcv9_002dx_002dsolaris2"></a>sparcv9-*-solaris2*</h3>
   1225  1.1  mrg 
   1226  1.1  mrg <p>This is a synonym for &lsquo;<samp><span class="samp">sparc64-*-solaris2*</span></samp>&rsquo;.
   1227  1.1  mrg 
   1228  1.1  mrg    <p><hr />
   1229  1.1  mrg 
   1230  1.3  mrg <h3 class="heading"><a name="TOC58"></a><a name="c6x_002dx_002dx"></a>c6x-*-*</h3>
   1231  1.3  mrg 
   1232  1.3  mrg <p>The C6X family of processors. This port requires binutils-2.22 or newer.
   1233  1.3  mrg 
   1234  1.3  mrg    <p><hr />
   1235  1.3  mrg 
   1236  1.3  mrg <h3 class="heading"><a name="TOC59"></a><a name="tilegx_002d_002a_002dlinux"></a>tilegx-*-linux*</h3>
   1237  1.3  mrg 
   1238  1.3  mrg <p>The TILE-Gx processor running GNU/Linux.  This port requires
   1239  1.3  mrg binutils-2.22 or newer.
   1240  1.3  mrg 
   1241  1.3  mrg    <p><hr />
   1242  1.3  mrg 
   1243  1.3  mrg <h3 class="heading"><a name="TOC60"></a><a name="tilepro_002d_002a_002dlinux"></a>tilepro-*-linux*</h3>
   1244  1.3  mrg 
   1245  1.3  mrg <p>The TILEPro processor running GNU/Linux.  This port requires
   1246  1.3  mrg binutils-2.22 or newer.
   1247  1.3  mrg 
   1248  1.3  mrg    <p><hr />
   1249  1.3  mrg 
   1250  1.3  mrg <h3 class="heading"><a name="TOC61"></a><a name="x_002dx_002dvxworks"></a>*-*-vxworks*</h3>
   1251  1.1  mrg 
   1252  1.1  mrg <p>Support for VxWorks is in flux.  At present GCC supports <em>only</em> the
   1253  1.1  mrg very recent VxWorks 5.5 (aka Tornado 2.2) release, and only on PowerPC. 
   1254  1.1  mrg We welcome patches for other architectures supported by VxWorks 5.5. 
   1255  1.1  mrg Support for VxWorks AE would also be welcome; we believe this is merely
   1256  1.1  mrg a matter of writing an appropriate &ldquo;configlette&rdquo; (see below).  We are
   1257  1.1  mrg not interested in supporting older, a.out or COFF-based, versions of
   1258  1.1  mrg VxWorks in GCC 3.
   1259  1.1  mrg 
   1260  1.1  mrg    <p>VxWorks comes with an older version of GCC installed in
   1261  1.1  mrg <samp><var>$WIND_BASE</var><span class="file">/host</span></samp>; we recommend you do not overwrite it. 
   1262  1.1  mrg Choose an installation <var>prefix</var> entirely outside <var>$WIND_BASE</var>. 
   1263  1.1  mrg Before running <samp><span class="command">configure</span></samp>, create the directories <samp><var>prefix</var></samp>
   1264  1.1  mrg and <samp><var>prefix</var><span class="file">/bin</span></samp>.  Link or copy the appropriate assembler,
   1265  1.1  mrg linker, etc. into <samp><var>prefix</var><span class="file">/bin</span></samp>, and set your <var>PATH</var> to
   1266  1.1  mrg include that directory while running both <samp><span class="command">configure</span></samp> and
   1267  1.1  mrg <samp><span class="command">make</span></samp>.
   1268  1.1  mrg 
   1269  1.1  mrg    <p>You must give <samp><span class="command">configure</span></samp> the
   1270  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
   1271  1.1  mrg find the VxWorks system headers.  Since VxWorks is a cross compilation
   1272  1.1  mrg target only, you must also specify <samp><span class="option">--target=</span><var>target</var></samp>. 
   1273  1.1  mrg <samp><span class="command">configure</span></samp> will attempt to create the directory
   1274  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;
   1275  1.1  mrg make sure the user running <samp><span class="command">configure</span></samp> has sufficient privilege
   1276  1.1  mrg to do so.
   1277  1.1  mrg 
   1278  1.1  mrg    <p>GCC's exception handling runtime requires a special &ldquo;configlette&rdquo;
   1279  1.1  mrg module, <samp><span class="file">contrib/gthr_supp_vxw_5x.c</span></samp>.  Follow the instructions in
   1280  1.1  mrg that file to add the module to your kernel build.  (Future versions of
   1281  1.1  mrg VxWorks will incorporate this module.)
   1282  1.1  mrg 
   1283  1.1  mrg    <p><hr />
   1284  1.1  mrg 
   1285  1.3  mrg <h3 class="heading"><a name="TOC62"></a><a name="x86_002d64_002dx_002dx"></a>x86_64-*-*, amd64-*-*</h3>
   1286  1.1  mrg 
   1287  1.1  mrg <p>GCC supports the x86-64 architecture implemented by the AMD64 processor
   1288  1.1  mrg (amd64-*-* is an alias for x86_64-*-*) on GNU/Linux, FreeBSD and NetBSD. 
   1289  1.1  mrg On GNU/Linux the default is a bi-arch compiler which is able to generate
   1290  1.1  mrg both 64-bit x86-64 and 32-bit x86 code (via the <samp><span class="option">-m32</span></samp> switch).
   1291  1.1  mrg 
   1292  1.1  mrg    <p><hr />
   1293  1.1  mrg 
   1294  1.3  mrg <h3 class="heading"><a name="TOC63"></a><a name="x86_002d64_002dx_002dsolaris210"></a>x86_64-*-solaris2.1[0-9]*</h3>
   1295  1.3  mrg 
   1296  1.3  mrg <p>GCC also supports the x86-64 architecture implemented by the AMD64
   1297  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
   1298  1.3  mrg Solaris 10 or later.  Unlike other systems, without special options a
   1299  1.3  mrg bi-arch compiler is built which generates 32-bit code by default, but
   1300  1.3  mrg can generate 64-bit x86-64 code with the <samp><span class="option">-m64</span></samp> switch.  Since
   1301  1.3  mrg GCC 4.7, there is also configuration that defaults to 64-bit code, but
   1302  1.3  mrg can generate 32-bit code with <samp><span class="option">-m32</span></samp>.  To configure and build
   1303  1.3  mrg this way, you have to provide all support libraries like <samp><span class="file">libgmp</span></samp>
   1304  1.3  mrg as 64-bit code, configure with <samp><span class="option">--target=x86_64-pc-solaris2.1x</span></samp>
   1305  1.3  mrg and &lsquo;<samp><span class="samp">CC=gcc -m64</span></samp>&rsquo;.
   1306  1.3  mrg 
   1307  1.3  mrg    <p><hr />
   1308  1.3  mrg 
   1309  1.3  mrg <h3 class="heading"><a name="TOC64"></a><a name="xtensa_002dx_002delf"></a>xtensa*-*-elf</h3>
   1310  1.1  mrg 
   1311  1.1  mrg <p>This target is intended for embedded Xtensa systems using the
   1312  1.1  mrg &lsquo;<samp><span class="samp">newlib</span></samp>&rsquo; C library.  It uses ELF but does not support shared
   1313  1.1  mrg objects.  Designed-defined instructions specified via the
   1314  1.1  mrg Tensilica Instruction Extension (TIE) language are only supported
   1315  1.1  mrg through inline assembly.
   1316  1.1  mrg 
   1317  1.1  mrg    <p>The Xtensa configuration information must be specified prior to
   1318  1.1  mrg building GCC.  The <samp><span class="file">include/xtensa-config.h</span></samp> header
   1319  1.1  mrg file contains the configuration information.  If you created your
   1320  1.1  mrg own Xtensa configuration with the Xtensa Processor Generator, the
   1321  1.1  mrg downloaded files include a customized copy of this header file,
   1322  1.1  mrg which you can use to replace the default header file.
   1323  1.1  mrg 
   1324  1.1  mrg    <p><hr />
   1325  1.1  mrg 
   1326  1.3  mrg <h3 class="heading"><a name="TOC65"></a><a name="xtensa_002dx_002dlinux"></a>xtensa*-*-linux*</h3>
   1327  1.1  mrg 
   1328  1.1  mrg <p>This target is for Xtensa systems running GNU/Linux.  It supports ELF
   1329  1.1  mrg shared objects and the GNU C library (glibc).  It also generates
   1330  1.1  mrg position-independent code (PIC) regardless of whether the
   1331  1.1  mrg <samp><span class="option">-fpic</span></samp> or <samp><span class="option">-fPIC</span></samp> options are used.  In other
   1332  1.1  mrg respects, this target is the same as the
   1333  1.1  mrg <a href="#xtensa*-*-elf">&lsquo;<samp><span class="samp">xtensa*-*-elf</span></samp>&rsquo;</a> target.
   1334  1.1  mrg 
   1335  1.1  mrg    <p><hr />
   1336  1.1  mrg 
   1337  1.3  mrg <h3 class="heading"><a name="TOC66"></a><a name="windows"></a>Microsoft Windows</h3>
   1338  1.1  mrg 
   1339  1.3  mrg <h4 class="subheading"><a name="TOC67"></a>Intel 16-bit versions</h4>
   1340  1.1  mrg 
   1341  1.1  mrg <p>The 16-bit versions of Microsoft Windows, such as Windows 3.1, are not
   1342  1.1  mrg supported.
   1343  1.1  mrg 
   1344  1.1  mrg    <p>However, the 32-bit port has limited support for Microsoft
   1345  1.1  mrg Windows 3.11 in the Win32s environment, as a target only.  See below.
   1346  1.1  mrg 
   1347  1.3  mrg <h4 class="subheading"><a name="TOC68"></a>Intel 32-bit versions</h4>
   1348  1.1  mrg 
   1349  1.1  mrg <p>The 32-bit versions of Windows, including Windows 95, Windows NT, Windows
   1350  1.1  mrg XP, and Windows Vista, are supported by several different target
   1351  1.1  mrg platforms.  These targets differ in which Windows subsystem they target
   1352  1.1  mrg and which C libraries are used.
   1353  1.1  mrg 
   1354  1.1  mrg      <ul>
   1355  1.1  mrg <li>Cygwin <a href="#x-x-cygwin">*-*-cygwin</a>: Cygwin provides a user-space
   1356  1.1  mrg Linux API emulation layer in the Win32 subsystem. 
   1357  1.1  mrg <li>Interix <a href="#x-x-interix">*-*-interix</a>: The Interix subsystem
   1358  1.1  mrg provides native support for POSIX. 
   1359  1.1  mrg <li>MinGW <a href="#x-x-mingw32">*-*-mingw32</a>: MinGW is a native GCC port for
   1360  1.1  mrg the Win32 subsystem that provides a subset of POSIX. 
   1361  1.1  mrg <li>MKS i386-pc-mks: NuTCracker from MKS.  See
   1362  1.1  mrg <a href="http://www.mkssoftware.com/">http://www.mkssoftware.com/</a> for more information. 
   1363  1.1  mrg </ul>
   1364  1.1  mrg 
   1365  1.3  mrg <h4 class="subheading"><a name="TOC69"></a>Intel 64-bit versions</h4>
   1366  1.1  mrg 
   1367  1.1  mrg <p>GCC contains support for x86-64 using the mingw-w64
   1368  1.1  mrg runtime library, available from <a href="http://mingw-w64.sourceforge.net/">http://mingw-w64.sourceforge.net/</a>. 
   1369  1.1  mrg This library should be used with the target triple x86_64-pc-mingw32.
   1370  1.1  mrg 
   1371  1.1  mrg    <p>Presently Windows for Itanium is not supported.
   1372  1.1  mrg 
   1373  1.3  mrg <h4 class="subheading"><a name="TOC70"></a>Windows CE</h4>
   1374  1.1  mrg 
   1375  1.3  mrg <p>Windows CE is supported as a target only on Hitachi
   1376  1.1  mrg SuperH (sh-wince-pe), and MIPS (mips-wince-pe).
   1377  1.1  mrg 
   1378  1.3  mrg <h4 class="subheading"><a name="TOC71"></a>Other Windows Platforms</h4>
   1379  1.1  mrg 
   1380  1.1  mrg <p>GCC no longer supports Windows NT on the Alpha or PowerPC.
   1381  1.1  mrg 
   1382  1.1  mrg    <p>GCC no longer supports the Windows POSIX subsystem.  However, it does
   1383  1.1  mrg support the Interix subsystem.  See above.
   1384  1.1  mrg 
   1385  1.1  mrg    <p>Old target names including *-*-winnt and *-*-windowsnt are no longer used.
   1386  1.1  mrg 
   1387  1.1  mrg    <p>PW32 (i386-pc-pw32) support was never completed, and the project seems to
   1388  1.1  mrg be inactive.  See <a href="http://pw32.sourceforge.net/">http://pw32.sourceforge.net/</a> for more information.
   1389  1.1  mrg 
   1390  1.1  mrg    <p>UWIN support has been removed due to a lack of maintenance.
   1391  1.1  mrg 
   1392  1.1  mrg    <p><hr />
   1393  1.1  mrg 
   1394  1.3  mrg <h3 class="heading"><a name="TOC72"></a><a name="x_002dx_002dcygwin"></a>*-*-cygwin</h3>
   1395  1.1  mrg 
   1396  1.1  mrg <p>Ports of GCC are included with the
   1397  1.1  mrg <a href="http://www.cygwin.com/">Cygwin environment</a>.
   1398  1.1  mrg 
   1399  1.1  mrg    <p>GCC will build under Cygwin without modification; it does not build
   1400  1.1  mrg with Microsoft's C++ compiler and there are no plans to make it do so.
   1401  1.1  mrg 
   1402  1.1  mrg    <p>The Cygwin native compiler can be configured to target any 32-bit x86
   1403  1.1  mrg cpu architecture desired; the default is i686-pc-cygwin.  It should be
   1404  1.1  mrg used with as up-to-date a version of binutils as possible; use either
   1405  1.1  mrg the latest official GNU binutils release in the Cygwin distribution,
   1406  1.1  mrg or version 2.20 or above if building your own.
   1407  1.1  mrg 
   1408  1.1  mrg    <p><hr />
   1409  1.1  mrg 
   1410  1.3  mrg <h3 class="heading"><a name="TOC73"></a><a name="x_002dx_002dinterix"></a>*-*-interix</h3>
   1411  1.1  mrg 
   1412  1.1  mrg <p>The Interix target is used by OpenNT, Interix, Services For UNIX (SFU),
   1413  1.1  mrg and Subsystem for UNIX-based Applications (SUA).  Applications compiled
   1414  1.1  mrg with this target run in the Interix subsystem, which is separate from
   1415  1.1  mrg the Win32 subsystem.  This target was last known to work in GCC 3.3.
   1416  1.1  mrg 
   1417  1.1  mrg    <p><hr />
   1418  1.1  mrg 
   1419  1.3  mrg <h3 class="heading"><a name="TOC74"></a><a name="x_002dx_002dmingw32"></a>*-*-mingw32</h3>
   1420  1.1  mrg 
   1421  1.1  mrg <p>GCC will build with and support only MinGW runtime 3.12 and later. 
   1422  1.1  mrg Earlier versions of headers are incompatible with the new default semantics
   1423  1.1  mrg of <code>extern inline</code> in <code>-std=c99</code> and <code>-std=gnu99</code> modes.
   1424  1.1  mrg 
   1425  1.1  mrg    <p><hr />
   1426  1.1  mrg 
   1427  1.3  mrg <h3 class="heading"><a name="TOC75"></a><a name="older"></a>Older systems</h3>
   1428  1.1  mrg 
   1429  1.1  mrg <p>GCC contains support files for many older (1980s and early
   1430  1.1  mrg 1990s) Unix variants.  For the most part, support for these systems
   1431  1.1  mrg has not been deliberately removed, but it has not been maintained for
   1432  1.1  mrg several years and may suffer from bitrot.
   1433  1.1  mrg 
   1434  1.1  mrg    <p>Starting with GCC 3.1, each release has a list of &ldquo;obsoleted&rdquo; systems. 
   1435  1.1  mrg Support for these systems is still present in that release, but
   1436  1.1  mrg <samp><span class="command">configure</span></samp> will fail unless the <samp><span class="option">--enable-obsolete</span></samp>
   1437  1.1  mrg option is given.  Unless a maintainer steps forward, support for these
   1438  1.1  mrg systems will be removed from the next release of GCC.
   1439  1.1  mrg 
   1440  1.1  mrg    <p>Support for old systems as hosts for GCC can cause problems if the
   1441  1.1  mrg workarounds for compiler, library and operating system bugs affect the
   1442  1.1  mrg cleanliness or maintainability of the rest of GCC.  In some cases, to
   1443  1.1  mrg bring GCC up on such a system, if still possible with current GCC, may
   1444  1.1  mrg require first installing an old version of GCC which did work on that
   1445  1.1  mrg system, and using it to compile a more recent GCC, to avoid bugs in the
   1446  1.1  mrg vendor compiler.  Old releases of GCC 1 and GCC 2 are available in the
   1447  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
   1448  1.1  mrg <samp><span class="command">fixincludes</span></samp>, but bugs or deficiencies in libraries and the
   1449  1.1  mrg operating system may still cause problems.
   1450  1.1  mrg 
   1451  1.1  mrg    <p>Support for older systems as targets for cross-compilation is less
   1452  1.1  mrg problematic than support for them as hosts for GCC; if an enthusiast
   1453  1.1  mrg wishes to make such a target work again (including resurrecting any of
   1454  1.1  mrg the targets that never worked with GCC 2, starting from the last
   1455  1.1  mrg version before they were removed), patches
   1456  1.1  mrg <a href="../contribute.html">following the usual requirements</a> would be
   1457  1.1  mrg likely to be accepted, since they should not affect the support for more
   1458  1.1  mrg modern targets.
   1459  1.1  mrg 
   1460  1.1  mrg    <p>For some systems, old versions of GNU binutils may also be useful,
   1461  1.1  mrg and are available from <samp><span class="file">pub/binutils/old-releases</span></samp> on
   1462  1.1  mrg <a href="http://sourceware.org/mirrors.html">sourceware.org mirror sites</a>.
   1463  1.1  mrg 
   1464  1.1  mrg    <p>Some of the information on specific systems above relates to
   1465  1.1  mrg such older systems, but much of the information
   1466  1.1  mrg about GCC on such systems (which may no longer be applicable to
   1467  1.1  mrg current GCC) is to be found in the GCC texinfo manual.
   1468  1.1  mrg 
   1469  1.1  mrg    <p><hr />
   1470  1.1  mrg 
   1471  1.3  mrg <h3 class="heading"><a name="TOC76"></a><a name="elf"></a>all ELF targets (SVR4, Solaris 2, etc.)</h3>
   1472  1.1  mrg 
   1473  1.1  mrg <p>C++ support is significantly better on ELF targets if you use the
   1474  1.1  mrg <a href="./configure.html#with-gnu-ld">GNU linker</a>; duplicate copies of
   1475  1.1  mrg inlines, vtables and template instantiations will be discarded
   1476  1.1  mrg automatically.
   1477  1.1  mrg 
   1478  1.1  mrg    <p><hr />
   1479  1.1  mrg <p><a href="./index.html">Return to the GCC Installation page</a>
   1480  1.1  mrg 
   1481  1.1  mrg <!-- ***Old documentation****************************************************** -->
   1482  1.1  mrg <!-- ***GFDL******************************************************************** -->
   1483  1.1  mrg <!-- *************************************************************************** -->
   1484  1.1  mrg <!-- Part 6 The End of the Document -->
   1485  1.1  mrg </body></html>
   1486  1.1  mrg 
   1487