1 <!DOCTYPE html> 2 <html> 3 <!-- Created by GNU Texinfo 7.2, https://www.gnu.org/software/texinfo/ --> 4 <head> 5 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 6 <!-- Copyright 1988-2024 Free Software Foundation, Inc. 7 8 Permission is granted to copy, distribute and/or modify this document 9 under the terms of the GNU Free Documentation License, Version 1.3 or 10 any later version published by the Free Software Foundation; with no 11 Invariant Sections, the Front-Cover texts being (a) (see below), and 12 with the Back-Cover Texts being (b) (see below). A copy of the 13 license is included in the section entitled "GNU 14 Free Documentation License". 15 16 (a) The FSF's Front-Cover Text is: 17 18 A GNU Manual 19 20 (b) The FSF's Back-Cover Text is: 21 22 You have freedom to copy and modify this GNU Manual, like GNU 23 software. Copies published by the Free Software Foundation raise 24 funds for GNU development. --> 25 <title>Host/Target specific installation notes for GCC</title> 26 27 <meta name="description" content="Host/Target specific installation notes for GCC"> 28 <meta name="keywords" content="Host/Target specific installation notes for GCC"> 29 <meta name="resource-type" content="document"> 30 <meta name="distribution" content="global"> 31 <meta name="Generator" content="makeinfo"> 32 <meta name="viewport" content="width=device-width,initial-scale=1"> 33 34 <style type="text/css"> 35 <!-- 36 a.copiable-link {visibility: hidden; text-decoration: none; line-height: 0em} 37 div.example {margin-left: 3.2em} 38 span:hover a.copiable-link {visibility: visible} 39 ul.mark-bullet {list-style-type: disc} 40 --> 41 </style> 42 43 44 </head> 45 46 <body lang="en"> 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 <a class="index-entry-id" id="index-Specific"></a> 75 <a class="index-entry-id" id="index-Specific-installation-notes"></a> 76 <a class="index-entry-id" id="index-Target-specific-installation"></a> 77 <a class="index-entry-id" id="index-Host-specific-installation"></a> 78 <a class="index-entry-id" id="index-Target-specific-installation-notes"></a> 79 80 <p>Please read this document carefully <em class="emph">before</em> installing the 81 GNU Compiler Collection on your machine. 82 </p> 83 <p>Note that this list of install notes is <em class="emph">not</em> a list of supported 84 hosts or targets. Not all supported hosts and targets are listed 85 here, only the ones that require host-specific or target-specific 86 information have to. 87 </p> 88 <ul class="itemize mark-bullet"> 89 <li><a class="uref" href="#aarch64-x-x">aarch64*-*-*</a> 90 </li><li><a class="uref" href="#amdgcn-x-amdhsa">amdgcn-*-amdhsa</a> 91 </li><li><a class="uref" href="#amd64-x-solaris2">amd64-*-solaris2*</a> 92 </li><li><a class="uref" href="#arc-x-elf32">arc-*-elf32</a> 93 </li><li><a class="uref" href="#arc-linux-uclibc">arc-linux-uclibc</a> 94 </li><li><a class="uref" href="#arm-x-eabi">arm-*-eabi</a> 95 </li><li><a class="uref" href="#avr">avr</a> 96 </li><li><a class="uref" href="#bfin">Blackfin</a> 97 </li><li><a class="uref" href="#cris">cris</a> 98 </li><li><a class="uref" href="#dos">DOS</a> 99 </li><li><a class="uref" href="#epiphany-x-elf">epiphany-*-elf</a> 100 </li><li><a class="uref" href="#ft32-x-elf">ft32-*-elf</a> 101 </li><li><a class="uref" href="#x-x-freebsd">*-*-freebsd*</a> 102 </li><li><a class="uref" href="#h8300-hms">h8300-hms</a> 103 </li><li><a class="uref" href="#hppa-hp-hpux">hppa*-hp-hpux*</a> 104 </li><li><a class="uref" href="#hppa-hp-hpux11">hppa*-hp-hpux11</a> 105 </li><li><a class="uref" href="#x-x-linux-gnu">*-*-linux-gnu</a> 106 </li><li><a class="uref" href="#ix86-x-linux">i?86-*-linux*</a> 107 </li><li><a class="uref" href="#ix86-x-solaris2">i?86-*-solaris2*</a> 108 </li><li><a class="uref" href="#ia64-x-linux">ia64-*-linux</a> 109 </li><li><a class="uref" href="#ia64-x-hpux">ia64-*-hpux*</a> 110 </li><li><a class="uref" href="#x-ibm-aix">*-ibm-aix*</a> 111 </li><li><a class="uref" href="#iq2000-x-elf">iq2000-*-elf</a> 112 </li><li><a class="uref" href="#loongarch">loongarch</a> 113 </li><li><a class="uref" href="#lm32-x-elf">lm32-*-elf</a> 114 </li><li><a class="uref" href="#lm32-x-uclinux">lm32-*-uclinux</a> 115 </li><li><a class="uref" href="#m32c-x-elf">m32c-*-elf</a> 116 </li><li><a class="uref" href="#m32r-x-elf">m32r-*-elf</a> 117 </li><li><a class="uref" href="#m68k-x-x">m68k-*-*</a> 118 </li><li><a class="uref" href="#m68k-x-uclinux">m68k-*-uclinux</a> 119 </li><li><a class="uref" href="#microblaze-x-elf">microblaze-*-elf</a> 120 </li><li><a class="uref" href="#mips-x-x">mips-*-*</a> 121 </li><li><a class="uref" href="#moxie-x-elf">moxie-*-elf</a> 122 </li><li><a class="uref" href="#msp430-x-elf">msp430-*-elf</a> 123 </li><li><a class="uref" href="#nds32le-x-elf">nds32le-*-elf</a> 124 </li><li><a class="uref" href="#nds32be-x-elf">nds32be-*-elf</a> 125 </li><li><a class="uref" href="#nvptx-x-none">nvptx-*-none</a> 126 </li><li><a class="uref" href="#or1k-x-elf">or1k-*-elf</a> 127 </li><li><a class="uref" href="#or1k-x-linux">or1k-*-linux</a> 128 </li><li><a class="uref" href="#powerpc-x-x">powerpc*-*-*</a> 129 </li><li><a class="uref" href="#powerpc-x-darwin">powerpc-*-darwin*</a> 130 </li><li><a class="uref" href="#powerpc-x-elf">powerpc-*-elf</a> 131 </li><li><a class="uref" href="#powerpc-x-linux-gnu">powerpc*-*-linux-gnu*</a> 132 </li><li><a class="uref" href="#powerpc-x-netbsd">powerpc-*-netbsd*</a> 133 </li><li><a class="uref" href="#powerpc-x-eabisim">powerpc-*-eabisim</a> 134 </li><li><a class="uref" href="#powerpc-x-eabi">powerpc-*-eabi</a> 135 </li><li><a class="uref" href="#powerpcle-x-elf">powerpcle-*-elf</a> 136 </li><li><a class="uref" href="#powerpcle-x-eabisim">powerpcle-*-eabisim</a> 137 </li><li><a class="uref" href="#powerpcle-x-eabi">powerpcle-*-eabi</a> 138 </li><li><a class="uref" href="#riscv32-x-elf">riscv32-*-elf</a> 139 </li><li><a class="uref" href="#riscv32-x-linux">riscv32-*-linux</a> 140 </li><li><a class="uref" href="#riscv64-x-elf">riscv64-*-elf</a> 141 </li><li><a class="uref" href="#riscv64-x-linux">riscv64-*-linux</a> 142 </li><li><a class="uref" href="#rl78-x-elf">rl78-*-elf</a> 143 </li><li><a class="uref" href="#rx-x-elf">rx-*-elf</a> 144 </li><li><a class="uref" href="#s390-x-linux">s390-*-linux*</a> 145 </li><li><a class="uref" href="#s390x-x-linux">s390x-*-linux*</a> 146 </li><li><a class="uref" href="#s390x-ibm-tpf">s390x-ibm-tpf*</a> 147 </li><li><a class="uref" href="#x-x-solaris2">*-*-solaris2*</a> 148 </li><li><a class="uref" href="#sparc-x-x">sparc*-*-*</a> 149 </li><li><a class="uref" href="#sparc-sun-solaris2">sparc-sun-solaris2*</a> 150 </li><li><a class="uref" href="#sparc-x-linux">sparc-*-linux*</a> 151 </li><li><a class="uref" href="#sparc64-x-solaris2">sparc64-*-solaris2*</a> 152 </li><li><a class="uref" href="#sparcv9-x-solaris2">sparcv9-*-solaris2*</a> 153 </li><li><a class="uref" href="#c6x-x-x">c6x-*-*</a> 154 </li><li><a class="uref" href="#visium-x-elf">visium-*-elf</a> 155 </li><li><a class="uref" href="#x-x-vxworks">*-*-vxworks*</a> 156 </li><li><a class="uref" href="#x86-64-x-x">x86_64-*-*, amd64-*-*</a> 157 </li><li><a class="uref" href="#x86-64-x-solaris2">x86_64-*-solaris2*</a> 158 </li><li><a class="uref" href="#xtensa-x-elf">xtensa*-*-elf</a> 159 </li><li><a class="uref" href="#xtensa-x-linux">xtensa*-*-linux*</a> 160 </li><li><a class="uref" href="#windows">Microsoft Windows</a> 161 </li><li><a class="uref" href="#x-x-cygwin">*-*-cygwin</a> 162 </li><li><a class="uref" href="#x-x-mingw32">*-*-mingw32</a> 163 </li><li><a class="uref" href="#os2">OS/2</a> 164 </li><li><a class="uref" href="#older">Older systems</a> 165 </li></ul> 166 167 <ul class="itemize mark-bullet"> 168 <li><a class="uref" href="#elf">all ELF targets</a> (SVR4, Solaris, etc.) 169 </li></ul> 170 171 172 <!-- -------- host/target specific issues start here ---------------- --> 173 <hr /> 174 <a class="anchor" id="aarch64-x-x"></a><h3 class="heading" id="aarch64*-*-*"><span>aarch64*-*-*<a class="copiable-link" href="#aarch64*-*-*"> ¶</a></span></h3> 175 <p>Binutils pre 2.24 does not have support for selecting <samp class="option">-mabi</samp> and 176 does not support ILP32. If it is used to build GCC 4.9 or later, GCC will 177 not support option <samp class="option">-mabi=ilp32</samp>. 178 </p> 179 <p>To enable a workaround for the Cortex-A53 erratum number 835769 by default 180 (for all CPUs regardless of -mcpu option given) at configure time use the 181 <samp class="option">--enable-fix-cortex-a53-835769</samp> option. This will enable the fix by 182 default and can be explicitly disabled during compilation by passing the 183 <samp class="option">-mno-fix-cortex-a53-835769</samp> option. Conversely, 184 <samp class="option">--disable-fix-cortex-a53-835769</samp> will disable the workaround by 185 default. The workaround is disabled by default if neither of 186 <samp class="option">--enable-fix-cortex-a53-835769</samp> or 187 <samp class="option">--disable-fix-cortex-a53-835769</samp> is given at configure time. 188 </p> 189 <p>To enable a workaround for the Cortex-A53 erratum number 843419 by default 190 (for all CPUs regardless of -mcpu option given) at configure time use the 191 <samp class="option">--enable-fix-cortex-a53-843419</samp> option. This workaround is applied at 192 link time. Enabling the workaround will cause GCC to pass the relevant option 193 to the linker. It can be explicitly disabled during compilation by passing the 194 <samp class="option">-mno-fix-cortex-a53-843419</samp> option. Conversely, 195 <samp class="option">--disable-fix-cortex-a53-843419</samp> will disable the workaround by default. 196 The workaround is disabled by default if neither of 197 <samp class="option">--enable-fix-cortex-a53-843419</samp> or 198 <samp class="option">--disable-fix-cortex-a53-843419</samp> is given at configure time. 199 </p> 200 <p>To enable Branch Target Identification Mechanism and Return Address Signing by 201 default at configure time use the <samp class="option">--enable-standard-branch-protection</samp> 202 option. This is equivalent to having <samp class="option">-mbranch-protection=standard</samp> 203 during compilation. This can be explicitly disabled during compilation by 204 passing the <samp class="option">-mbranch-protection=none</samp> option which turns off all 205 types of branch protections. Conversely, 206 <samp class="option">--disable-standard-branch-protection</samp> will disable both the 207 protections by default. This mechanism is turned off by default if neither 208 of the options are given at configure time. 209 </p> 210 <hr /> 211 <a class="anchor" id="amd64-x-solaris2"></a><h3 class="heading" id="amd64-*-solaris2*"><span>amd64-*-solaris2*<a class="copiable-link" href="#amd64-*-solaris2*"> ¶</a></span></h3> 212 <p>This is a synonym for ‘<samp class="samp">x86_64-*-solaris2*</samp>’. 213 </p> 214 <hr /> 215 <a class="anchor" id="amdgcn-x-amdhsa"></a><h3 class="heading" id="amdgcn-*-amdhsa"><span>amdgcn-*-amdhsa<a class="copiable-link" href="#amdgcn-*-amdhsa"> ¶</a></span></h3> 216 <p>AMD GCN GPU target. 217 </p> 218 <p>Instead of GNU Binutils, you will need to install LLVM 15, or later, and copy 219 <samp class="file">bin/llvm-mc</samp> to <samp class="file">amdgcn-amdhsa/bin/as</samp>, 220 <samp class="file">bin/lld</samp> to <samp class="file">amdgcn-amdhsa/bin/ld</samp>, 221 <samp class="file">bin/llvm-nm</samp> to <samp class="file">amdgcn-amdhsa/bin/nm</samp>, and 222 <samp class="file">bin/llvm-ar</samp> to both <samp class="file">bin/amdgcn-amdhsa-ar</samp> and 223 <samp class="file">bin/amdgcn-amdhsa-ranlib</samp>. Note that LLVM 13.0.1 or LLVM 14 can be used 224 by specifying a <code class="code">--with-multilib-list=</code> that does not list <code class="code">gfx1100</code> 225 and <code class="code">gfx1103</code>. 226 </p> 227 <p>Use Newlib (4.3.0 or newer; 4.4.0 contains some improvements and git commit 228 7dd4eb1db (2025-03-25, post-4.4.0) fixes device console output for GFX10 and 229 GFX11 devices). 230 </p> 231 <p>To run the binaries, install the HSA Runtime from the 232 <a class="uref" href="https://rocm.docs.amd.com/">ROCm Platform</a>, and use 233 <samp class="file">libexec/gcc/amdhsa-amdhsa/<var class="var">version</var>/gcn-run</samp> to launch them 234 on the GPU. 235 </p> 236 <p>To enable support for GCN3 Fiji devices (gfx803), GCC has to be configured with 237 <samp class="option">--with-arch=<code class="code">fiji</code></samp> or 238 <samp class="option">--with-multilib-list=<code class="code">fiji</code>,...</samp>. Note that support for Fiji 239 devices has been removed in ROCm 4.0 and support in LLVM was deprecated and has 240 been removed in LLVM 18. 241 </p> 242 <hr /> 243 <a class="anchor" id="arc-x-elf32"></a><h3 class="heading" id="arc-*-elf32"><span>arc-*-elf32<a class="copiable-link" href="#arc-*-elf32"> ¶</a></span></h3> 244 245 <p>Use ‘<samp class="samp">configure --target=arc-elf32 --with-cpu=<var class="var">cpu</var> --enable-languages="c,c++"</samp>’ 246 to configure GCC, with <var class="var">cpu</var> being one of ‘<samp class="samp">arc600</samp>’, ‘<samp class="samp">arc601</samp>’, 247 or ‘<samp class="samp">arc700</samp>’. 248 </p> 249 <hr /> 250 <a class="anchor" id="arc-linux-uclibc"></a><h3 class="heading" id="arc-linux-uclibc-1"><span>arc-linux-uclibc<a class="copiable-link" href="#arc-linux-uclibc-1"> ¶</a></span></h3> 251 252 <p>Use ‘<samp class="samp">configure --target=arc-linux-uclibc --with-cpu=arc700 --enable-languages="c,c++"</samp>’ to configure GCC. 253 </p> 254 <hr /> 255 <a class="anchor" id="arm-x-eabi"></a><h3 class="heading" id="arm-*-eabi"><span>arm-*-eabi<a class="copiable-link" href="#arm-*-eabi"> ¶</a></span></h3> 256 <p>ARM-family processors. 257 </p> 258 <p>Building the Ada frontend commonly fails (an infinite loop executing 259 <code class="code">xsinfo</code>) if the host compiler is GNAT 4.8. Host compilers built from the 260 GNAT 4.6, 4.9 or 5 release branches are known to succeed. 261 </p> 262 <hr /> 263 <a class="anchor" id="avr"></a><h3 class="heading" id="avr-1"><span>avr<a class="copiable-link" href="#avr-1"> ¶</a></span></h3> 264 <p>ATMEL AVR-family micro controllers. These are used in embedded 265 applications. There are no standard Unix configurations. 266 See “AVR Options” in the main manual 267 for the list of supported MCU types. 268 </p> 269 <p>Use ‘<samp class="samp">configure --target=avr --enable-languages="c"</samp>’ to configure GCC. 270 </p> 271 <p>Further installation notes and other useful information about AVR tools 272 can also be obtained from: 273 </p> 274 <ul class="itemize mark-bullet"> 275 <li><a class="uref" href="http://www.nongnu.org/avr/">http://www.nongnu.org/avr/</a> 276 </li><li><a class="uref" href="http://www.amelek.gda.pl/avr/">http://www.amelek.gda.pl/avr/</a> 277 </li></ul> 278 279 <p>The following error: 280 </p><div class="example smallexample"> 281 <pre class="example-preformatted">Error: register required 282 </pre></div> 283 284 <p>indicates that you should upgrade to a newer version of the binutils. 285 </p> 286 <hr /> 287 <a class="anchor" id="bfin"></a><h3 class="heading" id="Blackfin"><span>Blackfin<a class="copiable-link" href="#Blackfin"> ¶</a></span></h3> 288 <p>The Blackfin processor, an Analog Devices DSP. 289 See “Blackfin Options” in the main manual 290 </p> 291 <p>More information, and a version of binutils with support for this processor, 292 are available at <a class="uref" href="https://sourceforge.net/projects/adi-toolchain/">https://sourceforge.net/projects/adi-toolchain/</a>. 293 </p> 294 <hr /> 295 <a class="anchor" id="cris"></a><h3 class="heading" id="CRIS"><span>CRIS<a class="copiable-link" href="#CRIS"> ¶</a></span></h3> 296 <p>CRIS is a CPU architecture in Axis Communications systems-on-a-chip, for 297 example the ETRAX series. These are used in embedded applications. 298 </p> 299 <p>See “CRIS Options” in the main manual 300 for a list of CRIS-specific options. 301 </p> 302 <p>Use ‘<samp class="samp">configure --target=cris-elf</samp>’ to configure GCC for building 303 a cross-compiler for CRIS. 304 <hr /> 305 <a class="anchor" id="dos"></a></p><h3 class="heading" id="DOS"><span>DOS<a class="copiable-link" href="#DOS"> ¶</a></span></h3> 306 <p>Please have a look at the <a class="uref" href="binaries.html">binaries page</a>. 307 </p> 308 <p>You cannot install GCC by itself on MSDOS; it will not compile under 309 any MSDOS compiler except itself. You need to get the complete 310 compilation package DJGPP, which includes binaries as well as sources, 311 and includes all the necessary compilation tools and libraries. 312 </p> 313 <hr /> 314 <a class="anchor" id="epiphany-x-elf"></a><h3 class="heading" id="epiphany-*-elf"><span>epiphany-*-elf<a class="copiable-link" href="#epiphany-*-elf"> ¶</a></span></h3> 315 <p>Adapteva Epiphany. 316 This configuration is intended for embedded systems. 317 </p> 318 <hr /> 319 <a class="anchor" id="x-x-freebsd"></a><h3 class="heading" id="g_t*-*-freebsd*"><span>*-*-freebsd*<a class="copiable-link" href="#g_t*-*-freebsd*"> ¶</a></span></h3> 320 <p>We support FreeBSD using the ELF file format with DWARF 2 debugging 321 for all CPU architectures. There are 322 no known issues with mixing object files and libraries with different 323 debugging formats. 324 </p> 325 <p>We recommend bootstrapping against the latest GNU binutils or the 326 version found in the <samp class="file">devel/binutils</samp> port. This also has been 327 known to enable additional features and improve overall testsuite 328 results. 329 </p> 330 <p>Ada and D (or rather their respective libraries) are broken on 331 FreeBSD/i386. This also affects building 32-bit libraries on 332 FreeBSD/amd64, so configure with <samp class="option">--disable-multilib</samp> 333 there in case you are building one of these front ends. 334 </p> 335 <p>Go (or rather libgo) is generally broken on FreeBSD. 336 </p> 337 <hr /> 338 <a class="anchor" id="ft32-x-elf"></a><h3 class="heading" id="ft32-*-elf"><span>ft32-*-elf<a class="copiable-link" href="#ft32-*-elf"> ¶</a></span></h3> 339 <p>The FT32 processor. 340 This configuration is intended for embedded systems. 341 </p> 342 <hr /> 343 <a class="anchor" id="h8300-hms"></a><h3 class="heading" id="h8300-hms-1"><span>h8300-hms<a class="copiable-link" href="#h8300-hms-1"> ¶</a></span></h3> 344 <p>Renesas H8/300 series of processors. 345 </p> 346 <p>Please have a look at the <a class="uref" href="binaries.html">binaries page</a>. 347 </p> 348 <p>The calling convention and structure layout has changed in release 2.6. 349 All code must be recompiled. The calling convention now passes the 350 first three arguments in function calls in registers. Structures are no 351 longer a multiple of 2 bytes. 352 </p> 353 <hr /> 354 <a class="anchor" id="hppa-hp-hpux"></a><h3 class="heading" id="hppa*-hp-hpux*"><span>hppa*-hp-hpux*<a class="copiable-link" href="#hppa*-hp-hpux*"> ¶</a></span></h3> 355 <p>We require using gas on all hppa platforms. Version 2.19 or 356 later is recommended. 357 </p> 358 <p>It may be helpful to configure GCC with the 359 <a class="uref" href="./configure.html#with-gnu-as"><samp class="option">--with-gnu-as</samp></a> and 360 <samp class="option">--with-as=…</samp> options to ensure that GCC can find GAS. 361 </p> 362 <p>There are two default scheduling models for instructions. These are 363 PROCESSOR_7100LC and PROCESSOR_8000. They are selected from the pa-risc 364 architecture specified for the target machine when configuring. 365 PROCESSOR_8000 is the default. PROCESSOR_7100LC is selected when 366 the target is a ‘<samp class="samp">hppa1*</samp>’ machine. 367 </p> 368 <p>The PROCESSOR_8000 model is not well suited to older processors. Thus, 369 it is important to completely specify the machine architecture when 370 configuring if you want a model other than PROCESSOR_8000. The macro 371 TARGET_SCHED_DEFAULT can be defined in BOOT_CFLAGS if a different 372 default scheduling model is desired. 373 </p> 374 <p>As of GCC 4.0, GCC uses the UNIX 95 namespace for HP-UX 10.10 375 through 11.00, and the UNIX 98 namespace for HP-UX 11.11 and later. 376 This namespace change might cause problems when bootstrapping with 377 an earlier version of GCC or the HP compiler as essentially the same 378 namespace is required for an entire build. This problem can be avoided 379 in a number of ways. With HP cc, <code class="env">UNIX_STD</code> can be set to ‘<samp class="samp">95</samp>’ 380 or ‘<samp class="samp">98</samp>’. Another way is to add an appropriate set of predefines 381 to <code class="env">CC</code>. The description for the <samp class="option">munix=</samp> option contains 382 a list of the predefines used with each standard. 383 </p> 384 <p>More specific information to ‘<samp class="samp">hppa*-hp-hpux*</samp>’ targets follows. 385 </p> 386 <hr /> 387 <a class="anchor" id="hppa-hp-hpux11"></a><h3 class="heading" id="hppa*-hp-hpux11"><span>hppa*-hp-hpux11<a class="copiable-link" href="#hppa*-hp-hpux11"> ¶</a></span></h3> 388 <p>Refer to <a class="uref" href="binaries.html">binaries</a> for information about obtaining 389 precompiled GCC binaries for HP-UX. Precompiled binaries must be obtained 390 to build the Ada language as it cannot be bootstrapped using C. Ada is 391 only available for the 32-bit PA-RISC runtime. 392 </p> 393 <p>Starting with GCC 3.4 an ISO C compiler is required to bootstrap. The 394 bundled compiler supports only traditional C; you will need either HP’s 395 unbundled compiler, or a binary distribution of GCC. 396 </p> 397 <p>It is possible to build GCC 3.3 starting with the bundled HP compiler, 398 but the process requires several steps. GCC 3.3 can then be used to 399 build later versions. 400 </p> 401 <p>There are several possible approaches to building the distribution. 402 Binutils can be built first using the HP tools. Then, the GCC 403 distribution can be built. The second approach is to build GCC 404 first using the HP tools, then build binutils, then rebuild GCC. 405 There have been problems with various binary distributions, so it 406 is best not to start from a binary distribution. 407 </p> 408 <p>On 64-bit capable systems, there are two distinct targets. Different 409 installation prefixes must be used if both are to be installed on 410 the same system. The ‘<samp class="samp">hppa[1-2]*-hp-hpux11*</samp>’ target generates code 411 for the 32-bit PA-RISC runtime architecture and uses the HP linker. 412 The ‘<samp class="samp">hppa64-hp-hpux11*</samp>’ target generates 64-bit code for the 413 PA-RISC 2.0 architecture. 414 </p> 415 <p>The script config.guess now selects the target type based on the compiler 416 detected during configuration. You must define <code class="env">PATH</code> or <code class="env">CC</code> so 417 that configure finds an appropriate compiler for the initial bootstrap. 418 When <code class="env">CC</code> is used, the definition should contain the options that are 419 needed whenever <code class="env">CC</code> is used. 420 </p> 421 <p>Specifically, options that determine the runtime architecture must be 422 in <code class="env">CC</code> to correctly select the target for the build. It is also 423 convenient to place many other compiler options in <code class="env">CC</code>. For example, 424 <code class="env">CC="cc -Ac +DA2.0W -Wp,-H16376 -D_CLASSIC_TYPES -D_HPUX_SOURCE"</code> 425 can be used to bootstrap the GCC 3.3 branch with the HP compiler in 426 64-bit K&R/bundled mode. The <samp class="option">+DA2.0W</samp> option will result in 427 the automatic selection of the ‘<samp class="samp">hppa64-hp-hpux11*</samp>’ target. The 428 macro definition table of cpp needs to be increased for a successful 429 build with the HP compiler. _CLASSIC_TYPES and _HPUX_SOURCE need to 430 be defined when building with the bundled compiler, or when using the 431 <samp class="option">-Ac</samp> option. These defines aren’t necessary with <samp class="option">-Ae</samp>. 432 </p> 433 <p>It is best to explicitly configure the ‘<samp class="samp">hppa64-hp-hpux11*</samp>’ target 434 with the <samp class="option">--with-ld=…</samp> option. This overrides the standard 435 search for ld. The two linkers supported on this target require different 436 commands. The default linker is determined during configuration. As a 437 result, it’s not possible to switch linkers in the middle of a GCC build. 438 This has been reported to sometimes occur in unified builds of binutils 439 and GCC. 440 </p> 441 <p>A recent linker patch must be installed for the correct operation of 442 GCC 3.3 and later. <code class="code">PHSS_26559</code> and <code class="code">PHSS_24304</code> are the 443 oldest linker patches that are known to work. They are for HP-UX 444 11.00 and 11.11, respectively. <code class="code">PHSS_24303</code>, the companion to 445 <code class="code">PHSS_24304</code>, might be usable but it hasn’t been tested. These 446 patches have been superseded. Consult the HP patch database to obtain 447 the currently recommended linker patch for your system. 448 </p> 449 <p>The patches are necessary for the support of weak symbols on the 450 32-bit port, and for the running of initializers and finalizers. Weak 451 symbols are implemented using SOM secondary definition symbols. Prior 452 to HP-UX 11, there are bugs in the linker support for secondary symbols. 453 The patches correct a problem of linker core dumps creating shared 454 libraries containing secondary symbols, as well as various other 455 linking issues involving secondary symbols. 456 </p> 457 <p>GCC 3.3 uses the ELF DT_INIT_ARRAY and DT_FINI_ARRAY capabilities to 458 run initializers and finalizers on the 64-bit port. The 32-bit port 459 uses the linker <samp class="option">+init</samp> and <samp class="option">+fini</samp> options for the same 460 purpose. The patches correct various problems with the +init/+fini 461 options, including program core dumps. Binutils 2.14 corrects a 462 problem on the 64-bit port resulting from HP’s non-standard use of 463 the .init and .fini sections for array initializers and finalizers. 464 </p> 465 <p>Only the HP linker is supported for the ‘<samp class="samp">hppa64-hp-hpux11*</samp>’ target. 466 </p> 467 <p>At this time, the GNU linker does not support the creation of long 468 branch stubs. As a result, it cannot successfully link binaries 469 containing branch offsets larger than 8 megabytes. In addition, 470 there are problems linking shared libraries, linking executables 471 with <samp class="option">-static</samp>, and with dwarf2 unwind and exception support. 472 It also doesn’t provide stubs for internal calls to global functions 473 in shared libraries, so these calls cannot be overloaded. 474 </p> 475 <p>The HP dynamic loader does not support GNU symbol versioning, so symbol 476 versioning is not supported. It may be necessary to disable symbol 477 versioning with <samp class="option">--disable-symvers</samp> when using GNU ld. 478 </p> 479 <p>POSIX threads are the default. The optional DCE thread library is not 480 supported, so <samp class="option">--enable-threads=dce</samp> does not work. 481 </p> 482 <hr /> 483 <a class="anchor" id="x-x-linux-gnu"></a><h3 class="heading" id="g_t*-*-linux-gnu"><span>*-*-linux-gnu<a class="copiable-link" href="#g_t*-*-linux-gnu"> ¶</a></span></h3> 484 <p>The <code class="code">.init_array</code> and <code class="code">.fini_array</code> sections are enabled 485 unconditionally which requires at least glibc 2.1 and binutils 2.12. 486 </p> 487 <p>Versions of libstdc++-v3 starting with 3.2.1 require bug fixes present 488 in glibc 2.2.5 and later. More information is available in the 489 libstdc++-v3 documentation. 490 </p> 491 <hr /> 492 <a class="anchor" id="ix86-x-linux"></a><h3 class="heading" id="i_003f86-*-linux*"><span>i?86-*-linux*<a class="copiable-link" href="#i_003f86-*-linux*"> ¶</a></span></h3> 493 <p>As of GCC 3.3, binutils 2.13.1 or later is required for this platform. 494 See <a class="uref" href="https://gcc.gnu.org/PR10877">bug 10877</a> for more information. 495 </p> 496 <p>If you receive Signal 11 errors when building on GNU/Linux, then it is 497 possible you have a hardware problem. Further information on this can be 498 found on <a class="uref" href="https://www.bitwizard.nl/sig11/">www.bitwizard.nl</a>. 499 </p> 500 <hr /> 501 <a class="anchor" id="ix86-x-solaris2"></a><h3 class="heading" id="i_003f86-*-solaris2*"><span>i?86-*-solaris2*<a class="copiable-link" href="#i_003f86-*-solaris2*"> ¶</a></span></h3> 502 <p>Use this for Solaris 11.3 or later on x86 and x86-64 systems. Starting 503 with GCC 4.7, there is also a 64-bit ‘<samp class="samp">amd64-*-solaris2*</samp>’ or 504 ‘<samp class="samp">x86_64-*-solaris2*</samp>’ configuration that corresponds to 505 ‘<samp class="samp">sparcv9-sun-solaris2*</samp>’. 506 </p> 507 <hr /> 508 <a class="anchor" id="ia64-x-linux"></a><h3 class="heading" id="ia64-*-linux"><span>ia64-*-linux<a class="copiable-link" href="#ia64-*-linux"> ¶</a></span></h3> 509 <p>IA-64 processor (also known as IPF, or Itanium Processor Family) 510 running GNU/Linux. 511 </p> 512 <p>If you are using the installed system libunwind library with 513 <samp class="option">--with-system-libunwind</samp>, then you must use libunwind 0.98 or 514 later. 515 </p> 516 <hr /> 517 <a class="anchor" id="ia64-x-hpux"></a><h3 class="heading" id="ia64-*-hpux*"><span>ia64-*-hpux*<a class="copiable-link" href="#ia64-*-hpux*"> ¶</a></span></h3> 518 <p>Building GCC on this target requires the GNU Assembler. The bundled HP 519 assembler will not work. To prevent GCC from using the wrong assembler, 520 the option <samp class="option">--with-gnu-as</samp> may be necessary. 521 </p> 522 <hr /> 523 <!-- rs6000-ibm-aix*, powerpc-ibm-aix* --> 524 <a class="anchor" id="x-ibm-aix"></a><h3 class="heading" id="g_t*-ibm-aix*"><span>*-ibm-aix*<a class="copiable-link" href="#g_t*-ibm-aix*"> ¶</a></span></h3> 525 <p>Support for AIX version 3 and older was discontinued in GCC 3.4. 526 Support for AIX version 4.2 and older was discontinued in GCC 4.5. 527 </p> 528 <p>“out of memory” bootstrap failures may indicate a problem with 529 process resource limits (ulimit). Hard limits are configured in the 530 <samp class="file">/etc/security/limits</samp> system configuration file. 531 </p> 532 <p>GCC 4.9 and above require a C++ compiler for bootstrap. IBM VAC++ / xlC 533 cannot bootstrap GCC. xlc can bootstrap an older version of GCC and 534 G++ can bootstrap recent releases of GCC. 535 </p> 536 <p>GCC can bootstrap with recent versions of IBM XLC, but bootstrapping 537 with an earlier release of GCC is recommended. Bootstrapping with XLC 538 requires a larger data segment, which can be enabled through the 539 <var class="var">LDR_CNTRL</var> environment variable, e.g., 540 </p> 541 <div class="example smallexample"> 542 <pre class="example-preformatted">% LDR_CNTRL=MAXDATA=0x50000000 543 % export LDR_CNTRL 544 </pre></div> 545 546 <p>One can start with a pre-compiled version of GCC to build from 547 sources. One may delete GCC’s “fixed” header files when starting 548 with a version of GCC built for an earlier release of AIX. 549 </p> 550 <p>To speed up the configuration phases of bootstrapping and installing GCC, 551 one may use GNU Bash instead of AIX <code class="command">/bin/sh</code>, e.g., 552 </p> 553 <div class="example smallexample"> 554 <pre class="example-preformatted">% CONFIG_SHELL=/opt/freeware/bin/bash 555 % export CONFIG_SHELL 556 </pre></div> 557 558 <p>and then proceed as described in <a class="uref" href="build.html">the build 559 instructions</a>, where we strongly recommend specifying an absolute path 560 to invoke <var class="var">srcdir</var>/configure. 561 </p> 562 <p>Because GCC on AIX is built as a 32-bit executable by default, 563 (although it can generate 64-bit programs) the GMP and MPFR libraries 564 required by gfortran must be 32-bit libraries. Building GMP and MPFR 565 as static archive libraries works better than shared libraries. 566 </p> 567 <p>Errors involving <code class="code">alloca</code> when building GCC generally are due 568 to an incorrect definition of <code class="code">CC</code> in the Makefile or mixing files 569 compiled with the native C compiler and GCC. During the stage1 phase of 570 the build, the native AIX compiler <strong class="strong">must</strong> be invoked as <code class="command">cc</code> 571 (not <code class="command">xlc</code>). Once <code class="command">configure</code> has been informed of 572 <code class="command">xlc</code>, one needs to use ‘<samp class="samp">make distclean</samp>’ to remove the 573 configure cache files and ensure that <code class="env">CC</code> environment variable 574 does not provide a definition that will confuse <code class="command">configure</code>. 575 If this error occurs during stage2 or later, then the problem most likely 576 is the version of Make (see above). 577 </p> 578 <p>The native <code class="command">as</code> and <code class="command">ld</code> are recommended for 579 bootstrapping on AIX. The GNU Assembler, GNU Linker, and GNU 580 Binutils version 2.20 is the minimum level that supports bootstrap on 581 AIX 5. The GNU Assembler has not been updated to support AIX 6 or 582 AIX 7. The native AIX tools do interoperate with GCC. 583 </p> 584 <p>AIX 7.1 added partial support for DWARF debugging, but full support 585 requires AIX 7.1 TL03 SP7 that supports additional DWARF sections and 586 fixes a bug in the assembler. AIX 7.1 TL03 SP5 distributed a version 587 of libm.a missing important symbols; a fix for IV77796 will be 588 included in SP6. 589 </p> 590 <p>AIX 5.3 TL10, AIX 6.1 TL05 and AIX 7.1 TL00 introduced an AIX 591 assembler change that sometimes produces corrupt assembly files 592 causing AIX linker errors. The bug breaks GCC bootstrap on AIX and 593 can cause compilation failures with existing GCC installations. An 594 AIX iFix for AIX 5.3 is available (APAR IZ98385 for AIX 5.3 TL10, APAR 595 IZ98477 for AIX 5.3 TL11 and IZ98134 for AIX 5.3 TL12). AIX 5.3 TL11 SP8, 596 AIX 5.3 TL12 SP5, AIX 6.1 TL04 SP11, AIX 6.1 TL05 SP7, AIX 6.1 TL06 SP6, 597 AIX 6.1 TL07 and AIX 7.1 TL01 should include the fix. 598 </p> 599 <p>Building <samp class="file">libstdc++.a</samp> requires a fix for an AIX Assembler bug 600 APAR IY26685 (AIX 4.3) or APAR IY25528 (AIX 5.1). It also requires a 601 fix for another AIX Assembler bug and a co-dependent AIX Archiver fix 602 referenced as APAR IY53606 (AIX 5.2) or as APAR IY54774 (AIX 5.1) 603 </p> 604 <a class="anchor" id="TransferAixShobj"></a><p>‘<samp class="samp">libstdc++</samp>’ in GCC 3.4 increments the major version number of the 605 shared object and GCC installation places the <samp class="file">libstdc++.a</samp> 606 shared library in a common location which will overwrite the and GCC 607 3.3 version of the shared library. Applications either need to be 608 re-linked against the new shared library or the GCC 3.1 and GCC 3.3 609 versions of the ‘<samp class="samp">libstdc++</samp>’ shared object needs to be available 610 to the AIX runtime loader. The GCC 3.1 ‘<samp class="samp">libstdc++.so.4</samp>’, if 611 present, and GCC 3.3 ‘<samp class="samp">libstdc++.so.5</samp>’ shared objects can be 612 installed for runtime dynamic loading using the following steps to set 613 the ‘<samp class="samp">F_LOADONLY</samp>’ flag in the shared object for <em class="emph">each</em> 614 multilib <samp class="file">libstdc++.a</samp> installed: 615 </p> 616 <p>Extract the shared objects from the currently installed 617 <samp class="file">libstdc++.a</samp> archive: 618 </p><div class="example smallexample"> 619 <pre class="example-preformatted">% ar -x libstdc++.a libstdc++.so.4 libstdc++.so.5 620 </pre></div> 621 622 <p>Enable the ‘<samp class="samp">F_LOADONLY</samp>’ flag so that the shared object will be 623 available for runtime dynamic loading, but not linking: 624 </p><div class="example smallexample"> 625 <pre class="example-preformatted">% strip -e libstdc++.so.4 libstdc++.so.5 626 </pre></div> 627 628 <p>Archive the runtime-only shared object in the GCC 3.4 629 <samp class="file">libstdc++.a</samp> archive: 630 </p><div class="example smallexample"> 631 <pre class="example-preformatted">% ar -q libstdc++.a libstdc++.so.4 libstdc++.so.5 632 </pre></div> 633 634 <p>Eventually, the 635 <a class="uref" href="./configure.html#WithAixSoname"><samp class="option">--with-aix-soname=svr4</samp></a> 636 configure option may drop the need for this procedure for libraries that 637 support it. 638 </p> 639 <p>Linking executables and shared libraries may produce warnings of 640 duplicate symbols. The assembly files generated by GCC for AIX always 641 have included multiple symbol definitions for certain global variable 642 and function declarations in the original program. The warnings should 643 not prevent the linker from producing a correct library or runnable 644 executable. 645 </p> 646 <p>AIX 4.3 utilizes a “large format” archive to support both 32-bit and 647 64-bit object modules. The routines provided in AIX 4.3.0 and AIX 4.3.1 648 to parse archive libraries did not handle the new format correctly. 649 These routines are used by GCC and result in error messages during 650 linking such as “not a COFF file”. The version of the routines shipped 651 with AIX 4.3.1 should work for a 32-bit environment. The <samp class="option">-g</samp> 652 option of the archive command may be used to create archives of 32-bit 653 objects using the original “small format”. A correct version of the 654 routines is shipped with AIX 4.3.2 and above. 655 </p> 656 <p>Some versions of the AIX binder (linker) can fail with a relocation 657 overflow severe error when the <samp class="option">-bbigtoc</samp> option is used to link 658 GCC-produced object files into an executable that overflows the TOC. A fix 659 for APAR IX75823 (OVERFLOW DURING LINK WHEN USING GCC AND -BBIGTOC) is 660 available from IBM Customer Support and from its 661 <a class="uref" href="https://techsupport.services.ibm.com/">techsupport.services.ibm.com</a> 662 website as PTF U455193. 663 </p> 664 <p>The AIX 4.3.2.1 linker (bos.rte.bind_cmds Level 4.3.2.1) will dump core 665 with a segmentation fault when invoked by any version of GCC. A fix for 666 APAR IX87327 is available from IBM Customer Support and from its 667 <a class="uref" href="https://techsupport.services.ibm.com/">techsupport.services.ibm.com</a> 668 website as PTF U461879. This fix is incorporated in AIX 4.3.3 and above. 669 </p> 670 <p>The initial assembler shipped with AIX 4.3.0 generates incorrect object 671 files. A fix for APAR IX74254 (64BIT DISASSEMBLED OUTPUT FROM COMPILER FAILS 672 TO ASSEMBLE/BIND) is available from IBM Customer Support and from its 673 <a class="uref" href="https://techsupport.services.ibm.com/">techsupport.services.ibm.com</a> 674 website as PTF U453956. This fix is incorporated in AIX 4.3.1 and above. 675 </p> 676 <p>AIX provides National Language Support (NLS). Compilers and assemblers 677 use NLS to support locale-specific representations of various data 678 formats including floating-point numbers (e.g., ‘<samp class="samp">.</samp>’ vs ‘<samp class="samp">,</samp>’ for 679 separating decimal fractions). There have been problems reported where 680 GCC does not produce the same floating-point formats that the assembler 681 expects. If one encounters this problem, set the <code class="env">LANG</code> 682 environment variable to ‘<samp class="samp">C</samp>’ or ‘<samp class="samp">En_US</samp>’. 683 </p> 684 <p>A default can be specified with the <samp class="option">-mcpu=<var class="var">cpu_type</var></samp> 685 switch and using the configure option <samp class="option">--with-cpu-<var class="var">cpu_type</var></samp>. 686 </p> 687 <hr /> 688 <a class="anchor" id="iq2000-x-elf"></a><h3 class="heading" id="iq2000-*-elf"><span>iq2000-*-elf<a class="copiable-link" href="#iq2000-*-elf"> ¶</a></span></h3> 689 <p>Vitesse IQ2000 processors. These are used in embedded 690 applications. There are no standard Unix configurations. 691 </p> 692 <hr /> 693 <a class="anchor" id="lm32-x-elf"></a><h3 class="heading" id="lm32-*-elf"><span>lm32-*-elf<a class="copiable-link" href="#lm32-*-elf"> ¶</a></span></h3> 694 <p>Lattice Mico32 processor. 695 This configuration is intended for embedded systems. 696 </p> 697 <hr /> 698 <a class="anchor" id="lm32-x-uclinux"></a><h3 class="heading" id="lm32-*-uclinux"><span>lm32-*-uclinux<a class="copiable-link" href="#lm32-*-uclinux"> ¶</a></span></h3> 699 <p>Lattice Mico32 processor. 700 This configuration is intended for embedded systems running uClinux. 701 </p> 702 <hr /> 703 <a class="anchor" id="loongarch"></a><h3 class="heading" id="LoongArch"><span>LoongArch<a class="copiable-link" href="#LoongArch"> ¶</a></span></h3> 704 <p>LoongArch processor. 705 The following LoongArch targets are available: 706 </p><dl class="table"> 707 <dt><code class="code">loongarch64-linux-gnu*</code></dt> 708 <dd><p>LoongArch processor running GNU/Linux. This target triplet may be coupled 709 with a small set of possible suffixes to identify their default ABI type: 710 </p><dl class="table"> 711 <dt><code class="code">f64</code></dt> 712 <dd><p>Uses <code class="code">lp64d/base</code> ABI by default. 713 </p></dd> 714 <dt><code class="code">f32</code></dt> 715 <dd><p>Uses <code class="code">lp64f/base</code> ABI by default. 716 </p></dd> 717 <dt><code class="code">sf</code></dt> 718 <dd><p>Uses <code class="code">lp64s/base</code> ABI by default. 719 </p></dd> 720 </dl> 721 722 </dd> 723 <dt><code class="code">loongarch64-linux-gnu</code></dt> 724 <dd><p>Same as <code class="code">loongarch64-linux-gnuf64</code> for legacy support. 725 </p></dd> 726 </dl> 727 728 <p>More information about LoongArch can be found at 729 <a class="uref" href="https://github.com/loongson/LoongArch-Documentation">https://github.com/loongson/LoongArch-Documentation</a>. 730 </p> 731 <hr /> 732 <a class="anchor" id="m32c-x-elf"></a><h3 class="heading" id="m32c-*-elf"><span>m32c-*-elf<a class="copiable-link" href="#m32c-*-elf"> ¶</a></span></h3> 733 <p>Renesas M32C processor. 734 This configuration is intended for embedded systems. 735 </p> 736 <hr /> 737 <a class="anchor" id="m32r-x-elf"></a><h3 class="heading" id="m32r-*-elf"><span>m32r-*-elf<a class="copiable-link" href="#m32r-*-elf"> ¶</a></span></h3> 738 <p>Renesas M32R processor. 739 This configuration is intended for embedded systems. 740 </p> 741 <hr /> 742 <a class="anchor" id="m68k-x-x"></a><h3 class="heading" id="m68k-*-*"><span>m68k-*-*<a class="copiable-link" href="#m68k-*-*"> ¶</a></span></h3> 743 <p>By default, 744 ‘<samp class="samp">m68k-*-elf*</samp>’, ‘<samp class="samp">m68k-*-rtems</samp>’, ‘<samp class="samp">m68k-*-uclinux</samp>’ and 745 ‘<samp class="samp">m68k-*-linux</samp>’ 746 build libraries for both M680x0 and ColdFire processors. If you only 747 need the M680x0 libraries, you can omit the ColdFire ones by passing 748 <samp class="option">--with-arch=m68k</samp> to <code class="command">configure</code>. Alternatively, you 749 can omit the M680x0 libraries by passing <samp class="option">--with-arch=cf</samp> to 750 <code class="command">configure</code>. These targets default to 5206 or 5475 code as 751 appropriate for the target system when 752 configured with <samp class="option">--with-arch=cf</samp> and 68020 code otherwise. 753 </p> 754 <p>The ‘<samp class="samp">m68k-*-netbsd</samp>’ and 755 ‘<samp class="samp">m68k-*-openbsd</samp>’ targets also support the <samp class="option">--with-arch</samp> 756 option. They will generate ColdFire CFV4e code when configured with 757 <samp class="option">--with-arch=cf</samp> and 68020 code otherwise. 758 </p> 759 <p>You can override the default processors listed above by configuring 760 with <samp class="option">--with-cpu=<var class="var">target</var></samp>. This <var class="var">target</var> can either 761 be a <samp class="option">-mcpu</samp> argument or one of the following values: 762 ‘<samp class="samp">m68000</samp>’, ‘<samp class="samp">m68010</samp>’, ‘<samp class="samp">m68020</samp>’, ‘<samp class="samp">m68030</samp>’, 763 ‘<samp class="samp">m68040</samp>’, ‘<samp class="samp">m68060</samp>’, ‘<samp class="samp">m68020-40</samp>’ and ‘<samp class="samp">m68020-60</samp>’. 764 </p> 765 <p>GCC requires at least binutils version 2.17 on these targets. 766 </p> 767 <hr /> 768 <a class="anchor" id="m68k-x-uclinux"></a><h3 class="heading" id="m68k-*-uclinux"><span>m68k-*-uclinux<a class="copiable-link" href="#m68k-*-uclinux"> ¶</a></span></h3> 769 <p>GCC 4.3 changed the uClinux configuration so that it uses the 770 ‘<samp class="samp">m68k-linux-gnu</samp>’ ABI rather than the ‘<samp class="samp">m68k-elf</samp>’ ABI. 771 It also added improved support for C++ and flat shared libraries, 772 both of which were ABI changes. 773 </p> 774 <hr /> 775 <a class="anchor" id="microblaze-x-elf"></a><h3 class="heading" id="microblaze-*-elf"><span>microblaze-*-elf<a class="copiable-link" href="#microblaze-*-elf"> ¶</a></span></h3> 776 <p>Xilinx MicroBlaze processor. 777 This configuration is intended for embedded systems. 778 </p> 779 <hr /> 780 <a class="anchor" id="mips-x-x"></a><h3 class="heading" id="mips-*-*"><span>mips-*-*<a class="copiable-link" href="#mips-*-*"> ¶</a></span></h3> 781 <p>If on a MIPS system you get an error message saying “does not have gp 782 sections for all it’s [sic] sectons [sic]”, don’t worry about it. This 783 happens whenever you use GAS with the MIPS linker, but there is not 784 really anything wrong, and it is okay to use the output file. You can 785 stop such warnings by installing the GNU linker. 786 </p> 787 <p>It would be nice to extend GAS to produce the gp tables, but they are 788 optional, and there should not be a warning about their absence. 789 </p> 790 <p>The libstdc++ atomic locking routines for MIPS targets requires MIPS II 791 and later. A patch went in just after the GCC 3.3 release to 792 make ‘<samp class="samp">mips*-*-*</samp>’ use the generic implementation instead. You can also 793 configure for ‘<samp class="samp">mipsel-elf</samp>’ as a workaround. The 794 ‘<samp class="samp">mips*-*-linux*</samp>’ target continues to use the MIPS II routines. More 795 work on this is expected in future releases. 796 </p> 797 798 <p>The built-in <code class="code">__sync_*</code> functions are available on MIPS II and 799 later systems and others that support the ‘<samp class="samp">ll</samp>’, ‘<samp class="samp">sc</samp>’ and 800 ‘<samp class="samp">sync</samp>’ instructions. This can be overridden by passing 801 <samp class="option">--with-llsc</samp> or <samp class="option">--without-llsc</samp> when configuring GCC. 802 Since the Linux kernel emulates these instructions if they are 803 missing, the default for ‘<samp class="samp">mips*-*-linux*</samp>’ targets is 804 <samp class="option">--with-llsc</samp>. The <samp class="option">--with-llsc</samp> and 805 <samp class="option">--without-llsc</samp> configure options may be overridden at compile 806 time by passing the <samp class="option">-mllsc</samp> or <samp class="option">-mno-llsc</samp> options to 807 the compiler. 808 </p> 809 <p>MIPS systems check for division by zero (unless 810 <samp class="option">-mno-check-zero-division</samp> is passed to the compiler) by 811 generating either a conditional trap or a break instruction. Using 812 trap results in smaller code, but is only supported on MIPS II and 813 later. Also, some versions of the Linux kernel have a bug that 814 prevents trap from generating the proper signal (<code class="code">SIGFPE</code>). To enable 815 the use of break, use the <samp class="option">--with-divide=breaks</samp> 816 <code class="command">configure</code> option when configuring GCC. The default is to 817 use traps on systems that support them. 818 </p> 819 <hr /> 820 <a class="anchor" id="moxie-x-elf"></a><h3 class="heading" id="moxie-*-elf"><span>moxie-*-elf<a class="copiable-link" href="#moxie-*-elf"> ¶</a></span></h3> 821 <p>The moxie processor. 822 </p> 823 <hr /> 824 <a class="anchor" id="msp430-x-elf"></a><h3 class="heading" id="msp430-*-elf*"><span>msp430-*-elf*<a class="copiable-link" href="#msp430-*-elf*"> ¶</a></span></h3> 825 <p>TI MSP430 processor. 826 This configuration is intended for embedded systems. 827 </p> 828 <p>‘<samp class="samp">msp430-*-elf</samp>’ is the standard configuration with most GCC 829 features enabled by default. 830 </p> 831 <p>‘<samp class="samp">msp430-*-elfbare</samp>’ is tuned for a bare-metal environment, and disables 832 features related to shared libraries and other functionality not used for 833 this device. This reduces code and data usage of the GCC libraries, resulting 834 in a minimal run-time environment by default. 835 </p> 836 <p>Features disabled by default include: 837 </p><ul class="itemize mark-bullet"> 838 <li>transactional memory 839 </li><li>__cxa_atexit 840 </li></ul> 841 842 <hr /> 843 <a class="anchor" id="nds32le-x-elf"></a><h3 class="heading" id="nds32le-*-elf"><span>nds32le-*-elf<a class="copiable-link" href="#nds32le-*-elf"> ¶</a></span></h3> 844 <p>Andes NDS32 target in little endian mode. 845 </p> 846 <hr /> 847 <a class="anchor" id="nds32be-x-elf"></a><h3 class="heading" id="nds32be-*-elf"><span>nds32be-*-elf<a class="copiable-link" href="#nds32be-*-elf"> ¶</a></span></h3> 848 <p>Andes NDS32 target in big endian mode. 849 </p> 850 <hr /> 851 <a class="anchor" id="nvptx-x-none"></a><h3 class="heading" id="nvptx-*-none"><span>nvptx-*-none<a class="copiable-link" href="#nvptx-*-none"> ¶</a></span></h3> 852 <p>Nvidia PTX target. 853 </p> 854 <p>Instead of GNU binutils, you will need to install 855 <a class="uref" href="https://github.com/SourceryTools/nvptx-tools">nvptx-tools</a>. 856 Tell GCC where to find it: 857 <samp class="option">--with-build-time-tools=[install-nvptx-tools]/nvptx-none/bin</samp>. 858 </p> 859 <p>You will need newlib 4.3.0 or later. It can be 860 automatically built together with GCC. For this, add a symbolic link 861 to nvptx-newlib’s <samp class="file">newlib</samp> directory to the directory containing 862 the GCC sources. 863 </p> 864 <p>Use the <samp class="option">--disable-sjlj-exceptions</samp> and 865 <samp class="option">--enable-newlib-io-long-long</samp> options when configuring. 866 </p> 867 <p>The <samp class="option">--with-arch</samp> option may be specified to override the 868 default value for the <samp class="option">-march</samp> option, and to also build 869 corresponding target libraries. 870 The default is <samp class="option">--with-arch=sm_30</samp>. 871 </p> 872 <p>For example, if <samp class="option">--with-arch=sm_70</samp> is specified, 873 <samp class="option">-march=sm_30</samp> and <samp class="option">-march=sm_70</samp> target libraries are 874 built, and code generation defaults to <samp class="option">-march=sm_70</samp>. 875 </p> 876 <hr /> 877 <a class="anchor" id="or1k-x-elf"></a><h3 class="heading" id="or1k-*-elf"><span>or1k-*-elf<a class="copiable-link" href="#or1k-*-elf"> ¶</a></span></h3> 878 <p>The OpenRISC 1000 32-bit processor with delay slots. 879 This configuration is intended for embedded systems. 880 </p> 881 <hr /> 882 <a class="anchor" id="or1k-x-linux"></a><h3 class="heading" id="or1k-*-linux"><span>or1k-*-linux<a class="copiable-link" href="#or1k-*-linux"> ¶</a></span></h3> 883 <p>The OpenRISC 1000 32-bit processor with delay slots. 884 </p> 885 <hr /> 886 <a class="anchor" id="powerpc-x-x"></a><h3 class="heading" id="powerpc-*-*"><span>powerpc-*-*<a class="copiable-link" href="#powerpc-*-*"> ¶</a></span></h3> 887 <p>You can specify a default version for the <samp class="option">-mcpu=<var class="var">cpu_type</var></samp> 888 switch by using the configure option <samp class="option">--with-cpu-<var class="var">cpu_type</var></samp>. 889 </p> 890 <p>You will need GNU binutils 2.20 or newer. 891 </p> 892 <hr /> 893 <a class="anchor" id="powerpc-x-darwin"></a><h3 class="heading" id="powerpc-*-darwin*"><span>powerpc-*-darwin*<a class="copiable-link" href="#powerpc-*-darwin*"> ¶</a></span></h3> 894 <p>PowerPC running Darwin (Mac OS X kernel). 895 </p> 896 <p>Pre-installed versions of Mac OS X may not include any developer tools, 897 meaning that you will not be able to build GCC from source. Tool 898 binaries are available at 899 <a class="uref" href="https://opensource.apple.com">https://opensource.apple.com</a>. 900 </p> 901 <p>This version of GCC requires at least cctools-590.36. The 902 cctools-590.36 package referenced from 903 <a class="uref" href="https://gcc.gnu.org/ml/gcc/2006-03/msg00507.html">https://gcc.gnu.org/ml/gcc/2006-03/msg00507.html</a> will not work 904 on systems older than 10.3.9 (aka darwin7.9.0). 905 </p> 906 <hr /> 907 <a class="anchor" id="powerpc-x-elf"></a><h3 class="heading" id="powerpc-*-elf"><span>powerpc-*-elf<a class="copiable-link" href="#powerpc-*-elf"> ¶</a></span></h3> 908 <p>PowerPC system in big endian mode, running System V.4. 909 </p> 910 <hr /> 911 <a class="anchor" id="powerpc-x-linux-gnu"></a><h3 class="heading" id="powerpc*-*-linux-gnu*"><span>powerpc*-*-linux-gnu*<a class="copiable-link" href="#powerpc*-*-linux-gnu*"> ¶</a></span></h3> 912 <p>PowerPC system in big endian mode running Linux. 913 </p> 914 <hr /> 915 <a class="anchor" id="powerpc-x-netbsd"></a><h3 class="heading" id="powerpc-*-netbsd*"><span>powerpc-*-netbsd*<a class="copiable-link" href="#powerpc-*-netbsd*"> ¶</a></span></h3> 916 <p>PowerPC system in big endian mode running NetBSD. 917 </p> 918 <hr /> 919 <a class="anchor" id="powerpc-x-eabisim"></a><h3 class="heading" id="powerpc-*-eabisim"><span>powerpc-*-eabisim<a class="copiable-link" href="#powerpc-*-eabisim"> ¶</a></span></h3> 920 <p>Embedded PowerPC system in big endian mode for use in running under the 921 PSIM simulator. 922 </p> 923 <hr /> 924 <a class="anchor" id="powerpc-x-eabi"></a><h3 class="heading" id="powerpc-*-eabi"><span>powerpc-*-eabi<a class="copiable-link" href="#powerpc-*-eabi"> ¶</a></span></h3> 925 <p>Embedded PowerPC system in big endian mode. 926 </p> 927 <hr /> 928 <a class="anchor" id="powerpcle-x-elf"></a><h3 class="heading" id="powerpcle-*-elf"><span>powerpcle-*-elf<a class="copiable-link" href="#powerpcle-*-elf"> ¶</a></span></h3> 929 <p>PowerPC system in little endian mode, running System V.4. 930 </p> 931 <hr /> 932 <a class="anchor" id="powerpcle-x-eabisim"></a><h3 class="heading" id="powerpcle-*-eabisim"><span>powerpcle-*-eabisim<a class="copiable-link" href="#powerpcle-*-eabisim"> ¶</a></span></h3> 933 <p>Embedded PowerPC system in little endian mode for use in running under 934 the PSIM simulator. 935 </p> 936 <hr /> 937 <a class="anchor" id="powerpcle-x-eabi"></a><h3 class="heading" id="powerpcle-*-eabi"><span>powerpcle-*-eabi<a class="copiable-link" href="#powerpcle-*-eabi"> ¶</a></span></h3> 938 <p>Embedded PowerPC system in little endian mode. 939 </p> 940 <hr /> 941 <a class="anchor" id="rl78-x-elf"></a><h3 class="heading" id="rl78-*-elf"><span>rl78-*-elf<a class="copiable-link" href="#rl78-*-elf"> ¶</a></span></h3> 942 <p>The Renesas RL78 processor. 943 This configuration is intended for embedded systems. 944 </p> 945 <hr /> 946 <a class="anchor" id="riscv32-x-elf"></a><h3 class="heading" id="riscv32-*-elf"><span>riscv32-*-elf<a class="copiable-link" href="#riscv32-*-elf"> ¶</a></span></h3> 947 <p>The RISC-V RV32 instruction set. 948 This configuration is intended for embedded systems. 949 This (and all other RISC-V) targets require the binutils 2.30 release. 950 </p> 951 <hr /> 952 <a class="anchor" id="riscv32-x-linux"></a><h3 class="heading" id="riscv32-*-linux"><span>riscv32-*-linux<a class="copiable-link" href="#riscv32-*-linux"> ¶</a></span></h3> 953 <p>The RISC-V RV32 instruction set running GNU/Linux. 954 This (and all other RISC-V) targets require the binutils 2.30 release. 955 </p> 956 <hr /> 957 <a class="anchor" id="riscv64-x-elf"></a><h3 class="heading" id="riscv64-*-elf"><span>riscv64-*-elf<a class="copiable-link" href="#riscv64-*-elf"> ¶</a></span></h3> 958 <p>The RISC-V RV64 instruction set. 959 This configuration is intended for embedded systems. 960 This (and all other RISC-V) targets require the binutils 2.30 release. 961 </p> 962 <hr /> 963 <a class="anchor" id="riscv64-x-linux"></a><h3 class="heading" id="riscv64-*-linux"><span>riscv64-*-linux<a class="copiable-link" href="#riscv64-*-linux"> ¶</a></span></h3> 964 <p>The RISC-V RV64 instruction set running GNU/Linux. 965 This (and all other RISC-V) targets require the binutils 2.30 release. 966 </p> 967 <hr /> 968 <a class="anchor" id="rx-x-elf"></a><h3 class="heading" id="rx-*-elf"><span>rx-*-elf<a class="copiable-link" href="#rx-*-elf"> ¶</a></span></h3> 969 <p>The Renesas RX processor. 970 </p> 971 <hr /> 972 <a class="anchor" id="s390-x-linux"></a><h3 class="heading" id="s390-*-linux*"><span>s390-*-linux*<a class="copiable-link" href="#s390-*-linux*"> ¶</a></span></h3> 973 <p>S/390 system running GNU/Linux for S/390. 974 </p> 975 <hr /> 976 <a class="anchor" id="s390x-x-linux"></a><h3 class="heading" id="s390x-*-linux*"><span>s390x-*-linux*<a class="copiable-link" href="#s390x-*-linux*"> ¶</a></span></h3> 977 <p>zSeries system (64-bit) running GNU/Linux for zSeries. 978 </p> 979 <hr /> 980 <a class="anchor" id="s390x-ibm-tpf"></a><h3 class="heading" id="s390x-ibm-tpf*"><span>s390x-ibm-tpf*<a class="copiable-link" href="#s390x-ibm-tpf*"> ¶</a></span></h3> 981 <p>zSeries system (64-bit) running TPF. This platform is 982 supported as cross-compilation target only. 983 </p> 984 <hr /> 985 <a class="anchor" id="x-x-solaris2"></a><h3 class="heading" id="g_t*-*-solaris2*"><span>*-*-solaris2*<a class="copiable-link" href="#g_t*-*-solaris2*"> ¶</a></span></h3> 986 <p>Support for Solaris 11.3 and earlier has been obsoleted in GCC 13, but 987 can still be enabled by configuring with <samp class="option">--enable-obsolete</samp>. 988 Support for Solaris 10 has been removed in GCC 10. Support for Solaris 989 9 has been removed in GCC 5. Support for Solaris 8 has been removed in 990 GCC 4.8. Support for Solaris 7 has been removed in GCC 4.6. 991 </p> 992 <p>Solaris 11.3 provides GCC 4.5.2, 4.7.3, and 4.8.2 as 993 <code class="command">/usr/gcc/4.5/bin/gcc</code> or similar. Solaris 11.4 994 provides one or more of GCC 5, 7, 9, 10, 11, and 12. 995 </p> 996 <p>You need to install the <code class="code">system/header</code>, <code class="code">system/linker</code>, and 997 <code class="code">developer/assembler</code> packages. 998 </p> 999 <p>Trying to use the compatibility tools in <samp class="file">/usr/ucb</samp>, from the 1000 <code class="code">compatibility/ucb</code> package, to install GCC has been observed to 1001 cause trouble. The fix is to remove <samp class="file">/usr/ucb</samp> from your 1002 <code class="env">PATH</code>. 1003 </p> 1004 <p>The build process works more smoothly with the legacy Solaris tools so, 1005 if you have <samp class="file">/usr/xpg4/bin</samp> in your <code class="env">PATH</code>, we recommend that 1006 you place <samp class="file">/usr/bin</samp> before <samp class="file">/usr/xpg4/bin</samp> for the duration 1007 of the build. 1008 </p> 1009 <p>We recommend the use of the Solaris assembler or the GNU assembler, in 1010 conjunction with the Solaris linker. 1011 </p> 1012 <p>The GNU <code class="command">as</code> versions included in Solaris 11.3, from GNU 1013 binutils 2.23.1 or newer (in <samp class="file">/usr/bin/gas</samp> and 1014 <samp class="file">/usr/gnu/bin/as</samp>), are known to work. The version from GNU 1015 binutils 2.40 is known to work as well. Recent versions of the Solaris 1016 assembler in <samp class="file">/usr/bin/as</samp> work almost as well, though. To use GNU 1017 <code class="command">as</code>, configure with the options <samp class="option">--with-gnu-as 1018 --with-as=/usr/gnu/bin/as</samp>. 1019 </p> 1020 <p>For linking, the Solaris linker is preferred. If you want to use the 1021 GNU linker instead, the version in Solaris 11.3, from GNU binutils 1022 2.23.1 or newer (in <samp class="file">/usr/gnu/bin/ld</samp> and <samp class="file">/usr/bin/gld</samp>), 1023 works, as does the version from GNU binutils 2.40. However, it 1024 generally lacks platform specific features, so better stay with Solaris 1025 <code class="command">ld</code>. To use the LTO linker plugin 1026 (<samp class="option">-fuse-linker-plugin</samp>) with GNU <code class="command">ld</code>, GNU binutils 1027 <em class="emph">must</em> be configured with <samp class="option">--enable-largefile</samp>. To use 1028 Solaris <code class="command">ld</code>, we recommend to configure with 1029 <samp class="option">--without-gnu-ld --with-ld=/usr/bin/ld</samp> to guarantee the 1030 right linker is found irrespective of the user’s <code class="env">PATH</code>. 1031 </p> 1032 <p>Note that your mileage may vary if you use a combination of the GNU 1033 tools and the Solaris tools: while the combination GNU <code class="command">as</code> and 1034 Solaris <code class="command">ld</code> works well, the reverse combination Solaris 1035 <code class="command">as</code> with GNU <code class="command">ld</code> may fail to build or cause memory 1036 corruption at runtime in some cases for C++ programs. 1037 </p> 1038 <p>To enable symbol versioning in ‘<samp class="samp">libstdc++</samp>’ and other runtime 1039 libraries with the Solaris linker, you need to have any version of GNU 1040 <code class="command">c++filt</code>, which is part of GNU binutils. Symbol versioning 1041 will be disabled if no appropriate version is found. Solaris 1042 <code class="command">c++filt</code> from the Solaris Studio compilers does <em class="emph">not</em> 1043 work. 1044 </p> 1045 <p>In order to build the GNU Ada compiler, GNAT, a working GNAT is needed. 1046 Since Solaris 11.4 SRU 39, GNAT 11 or 12 is bundled in the 1047 <code class="code">developer/gcc/gcc-gnat</code> package. 1048 </p> 1049 <p>In order to build the GNU D compiler, GDC, a working ‘<samp class="samp">libphobos</samp>’ is 1050 needed. That library wasn’t built by default in GCC 9–11 on SPARC, or 1051 on x86 when the Solaris assembler is used, but can be enabled by 1052 configuring with <samp class="option">--enable-libphobos</samp>. Also, GDC 9.4.0 is 1053 required on x86, while GDC 9.3.0 is known to work on SPARC. 1054 </p> 1055 <p>The versions of the GNU Multiple Precision Library (GMP), the MPFR 1056 library and the MPC library bundled with Solaris 11.3 and later are 1057 usually recent enough to match GCC’s requirements. There are two 1058 caveats: 1059 </p> 1060 <ul class="itemize mark-bullet"> 1061 <li>While the version of the GMP library in Solaris 11.3 works with GCC, you 1062 need to configure with <samp class="option">--with-gmp-include=/usr/include/gmp</samp>. 1063 1064 </li><li>The version of the MPFR libary included in Solaris 11.3 is too old; you 1065 need to provide a more recent one. 1066 1067 </li></ul> 1068 1069 <hr /> 1070 <a class="anchor" id="sparc-x-x"></a><h3 class="heading" id="sparc*-*-*"><span>sparc*-*-*<a class="copiable-link" href="#sparc*-*-*"> ¶</a></span></h3> 1071 <p>This section contains general configuration information for all 1072 SPARC-based platforms. In addition to reading this section, please 1073 read all other sections that match your target. 1074 </p> 1075 <p>Newer versions of the GNU Multiple Precision Library (GMP), the MPFR 1076 library and the MPC library are known to be miscompiled by earlier 1077 versions of GCC on these platforms. We therefore recommend the use 1078 of the exact versions of these libraries listed as minimal versions 1079 in <a class="uref" href="prerequisites.html">the prerequisites</a>. 1080 </p> 1081 <hr /> 1082 <a class="anchor" id="sparc-sun-solaris2"></a><h3 class="heading" id="sparc-sun-solaris2*"><span>sparc-sun-solaris2*<a class="copiable-link" href="#sparc-sun-solaris2*"> ¶</a></span></h3> 1083 <p>When GCC is configured to use GNU binutils 2.14 or later, the binaries 1084 produced are smaller than the ones produced using Solaris native tools; 1085 this difference is quite significant for binaries containing debugging 1086 information. 1087 </p> 1088 <p>Starting with Solaris 7, the operating system is capable of executing 1089 64-bit SPARC V9 binaries. GCC 3.1 and later properly supports 1090 this; the <samp class="option">-m64</samp> option enables 64-bit code generation. 1091 </p> 1092 <p>When configuring the GNU Multiple Precision Library (GMP), the MPFR 1093 library or the MPC library on Solaris, the canonical target triplet must 1094 be specified as the <code class="command">build</code> parameter on the <code class="command">configure</code> 1095 line. This target triplet can be obtained by invoking 1096 <code class="command">./config.guess</code> in the toplevel source directory of GCC (and 1097 not that of GMP or MPFR or MPC). For example: 1098 </p> 1099 <div class="example smallexample"> 1100 <pre class="example-preformatted">% <var class="var">srcdir</var>/configure --build=sparc-sun-solaris2.11 --prefix=<var class="var">dirname</var> 1101 </pre></div> 1102 1103 <hr /> 1104 <a class="anchor" id="sparc-x-linux"></a><h3 class="heading" id="sparc-*-linux*"><span>sparc-*-linux*<a class="copiable-link" href="#sparc-*-linux*"> ¶</a></span></h3> 1105 1106 <hr /> 1107 <a class="anchor" id="sparc64-x-solaris2"></a><h3 class="heading" id="sparc64-*-solaris2*"><span>sparc64-*-solaris2*<a class="copiable-link" href="#sparc64-*-solaris2*"> ¶</a></span></h3> 1108 <p>This is a synonym for ‘<samp class="samp">sparcv9-*-solaris2*</samp>’. 1109 </p> 1110 <hr /> 1111 <a class="anchor" id="sparcv9-x-solaris2"></a><h3 class="heading" id="sparcv9-*-solaris2*"><span>sparcv9-*-solaris2*<a class="copiable-link" href="#sparcv9-*-solaris2*"> ¶</a></span></h3> 1112 1113 <p>When configuring a 64-bit-default GCC on Solaris/SPARC, you must use a 1114 build compiler that generates 64-bit code, either by default or by 1115 specifying ‘<samp class="samp">CC='gcc -m64' CXX='g++ -m64' GDC='gdc -m64'</samp>’ to <code class="command">configure</code>. 1116 Additionally, you <em class="emph">must</em> pass <samp class="option">--build=sparcv9-sun-solaris2.11</samp> 1117 or <samp class="option">--build=sparc64-sun-solaris2.11</samp> because <samp class="file">config.guess</samp> 1118 misdetects this situation, which can cause build failures. 1119 </p> 1120 <p>When configuring the GNU Multiple Precision Library (GMP), the MPFR 1121 library or the MPC library, the canonical target triplet must be specified 1122 as the <code class="command">build</code> parameter on the <code class="command">configure</code> line. For example: 1123 </p> 1124 <div class="example smallexample"> 1125 <pre class="example-preformatted">% <var class="var">srcdir</var>/configure --build=sparcv9-sun-solaris2.11 --prefix=<var class="var">dirname</var> 1126 </pre></div> 1127 1128 <hr /> 1129 <a class="anchor" id="c6x-x-x"></a><h3 class="heading" id="c6x-*-*"><span>c6x-*-*<a class="copiable-link" href="#c6x-*-*"> ¶</a></span></h3> 1130 <p>The C6X family of processors. This port requires binutils-2.22 or newer. 1131 </p> 1132 <hr /> 1133 <a class="anchor" id="visium-x-elf"></a><h3 class="heading" id="visium-*-elf"><span>visium-*-elf<a class="copiable-link" href="#visium-*-elf"> ¶</a></span></h3> 1134 <p>CDS VISIUMcore processor. 1135 This configuration is intended for embedded systems. 1136 </p> 1137 <hr /> 1138 <a class="anchor" id="x-x-vxworks"></a><h3 class="heading" id="g_t*-*-vxworks*"><span>*-*-vxworks*<a class="copiable-link" href="#g_t*-*-vxworks*"> ¶</a></span></h3> 1139 <p>Support for VxWorks is in flux. At present GCC supports <em class="emph">only</em> the 1140 very recent VxWorks 5.5 (aka Tornado 2.2) release, and only on PowerPC. 1141 We welcome patches for other architectures supported by VxWorks 5.5. 1142 Support for VxWorks AE would also be welcome; we believe this is merely 1143 a matter of writing an appropriate “configlette” (see below). We are 1144 not interested in supporting older, a.out or COFF-based, versions of 1145 VxWorks in GCC 3. 1146 </p> 1147 <p>VxWorks comes with an older version of GCC installed in 1148 <samp class="file"><var class="var">$WIND_BASE</var>/host</samp>; we recommend you do not overwrite it. 1149 Choose an installation <var class="var">prefix</var> entirely outside <var class="var">$WIND_BASE</var>. 1150 Before running <code class="command">configure</code>, create the directories <samp class="file"><var class="var">prefix</var></samp> 1151 and <samp class="file"><var class="var">prefix</var>/bin</samp>. Link or copy the appropriate assembler, 1152 linker, etc. into <samp class="file"><var class="var">prefix</var>/bin</samp>, and set your <var class="var">PATH</var> to 1153 include that directory while running both <code class="command">configure</code> and 1154 <code class="command">make</code>. 1155 </p> 1156 <p>You must give <code class="command">configure</code> the 1157 <samp class="option">--with-headers=<var class="var">$WIND_BASE</var>/target/h</samp> switch so that it can 1158 find the VxWorks system headers. Since VxWorks is a cross compilation 1159 target only, you must also specify <samp class="option">--target=<var class="var">target</var></samp>. 1160 <code class="command">configure</code> will attempt to create the directory 1161 <samp class="file"><var class="var">prefix</var>/<var class="var">target</var>/sys-include</samp> and copy files into it; 1162 make sure the user running <code class="command">configure</code> has sufficient privilege 1163 to do so. 1164 </p> 1165 <p>GCC’s exception handling runtime requires a special “configlette” 1166 module, <samp class="file">contrib/gthr_supp_vxw_5x.c</samp>. Follow the instructions in 1167 that file to add the module to your kernel build. (Future versions of 1168 VxWorks will incorporate this module.) 1169 </p> 1170 <hr /> 1171 <a class="anchor" id="x86-64-x-x"></a><h3 class="heading" id="x86_005f64-*-*_002c-amd64-*-*"><span>x86_64-*-*, amd64-*-*<a class="copiable-link" href="#x86_005f64-*-*_002c-amd64-*-*"> ¶</a></span></h3> 1172 <p>GCC supports the x86-64 architecture implemented by the AMD64 processor 1173 (amd64-*-* is an alias for x86_64-*-*) on GNU/Linux, FreeBSD and NetBSD. 1174 On GNU/Linux the default is a bi-arch compiler which is able to generate 1175 both 64-bit x86-64 and 32-bit x86 code (via the <samp class="option">-m32</samp> switch). 1176 </p> 1177 <hr /> 1178 <a class="anchor" id="x86-64-x-solaris2"></a><h3 class="heading" id="x86_005f64-*-solaris2*"><span>x86_64-*-solaris2*<a class="copiable-link" href="#x86_005f64-*-solaris2*"> ¶</a></span></h3> 1179 <p>GCC also supports the x86-64 architecture implemented by the AMD64 1180 processor (‘<samp class="samp">amd64-*-*</samp>’ is an alias for ‘<samp class="samp">x86_64-*-*</samp>’). 1181 Unlike other systems, without special options a 1182 bi-arch compiler is built which generates 32-bit code by default, but 1183 can generate 64-bit x86-64 code with the <samp class="option">-m64</samp> switch. Since 1184 GCC 4.7, there is also a configuration that defaults to 64-bit code, but 1185 can generate 32-bit code with <samp class="option">-m32</samp>. To configure and build 1186 this way, you have to provide all support libraries like <samp class="file">libgmp</samp> 1187 as 64-bit code, configure with <samp class="option">--target=x86_64-pc-solaris2.11</samp> 1188 and ‘<samp class="samp">CC=gcc -m64</samp>’. 1189 </p> 1190 <hr /> 1191 <a class="anchor" id="xtensa-x-elf"></a><h3 class="heading" id="xtensa*-*-elf"><span>xtensa*-*-elf<a class="copiable-link" href="#xtensa*-*-elf"> ¶</a></span></h3> 1192 <p>This target is intended for embedded Xtensa systems using the 1193 ‘<samp class="samp">newlib</samp>’ C library. It uses ELF but does not support shared 1194 objects. Designed-defined instructions specified via the 1195 Tensilica Instruction Extension (TIE) language are only supported 1196 through inline assembly. 1197 </p> 1198 <p>The Xtensa configuration information must be specified prior to 1199 building GCC. The <samp class="file">include/xtensa-config.h</samp> header 1200 file contains the configuration information. If you created your 1201 own Xtensa configuration with the Xtensa Processor Generator, the 1202 downloaded files include a customized copy of this header file, 1203 which you can use to replace the default header file. 1204 </p> 1205 <hr /> 1206 <a class="anchor" id="xtensa-x-linux"></a><h3 class="heading" id="xtensa*-*-linux*"><span>xtensa*-*-linux*<a class="copiable-link" href="#xtensa*-*-linux*"> ¶</a></span></h3> 1207 <p>This target is for Xtensa systems running GNU/Linux. It supports ELF 1208 shared objects and the GNU C library (glibc). It also generates 1209 position-independent code (PIC) regardless of whether the 1210 <samp class="option">-fpic</samp> or <samp class="option">-fPIC</samp> options are used. In other 1211 respects, this target is the same as the 1212 <a class="uref" href="#xtensa*-*-elf">‘<samp class="samp">xtensa*-*-elf</samp>’</a> target. 1213 </p> 1214 <hr /> 1215 <a class="anchor" id="windows"></a><h3 class="heading" id="Microsoft-Windows"><span>Microsoft Windows<a class="copiable-link" href="#Microsoft-Windows"> ¶</a></span></h3> 1216 1217 <h4 class="subheading" id="Intel-16-bit-versions"><span>Intel 16-bit versions<a class="copiable-link" href="#Intel-16-bit-versions"> ¶</a></span></h4> 1218 <p>The 16-bit versions of Microsoft Windows, such as Windows 3.1, are not 1219 supported. 1220 </p> 1221 <p>However, the 32-bit port has limited support for Microsoft 1222 Windows 3.11 in the Win32s environment, as a target only. See below. 1223 </p> 1224 <h4 class="subheading" id="Intel-32-bit-versions"><span>Intel 32-bit versions<a class="copiable-link" href="#Intel-32-bit-versions"> ¶</a></span></h4> 1225 <p>The 32-bit versions of Windows, including Windows 95, Windows NT, Windows 1226 XP, and Windows Vista, are supported by several different target 1227 platforms. These targets differ in which Windows subsystem they target 1228 and which C libraries are used. 1229 </p> 1230 <ul class="itemize mark-bullet"> 1231 <li>Cygwin <a class="uref" href="#x-x-cygwin">*-*-cygwin</a>: Cygwin provides a user-space 1232 Linux API emulation layer in the Win32 subsystem. 1233 </li><li>MinGW <a class="uref" href="#x-x-mingw32">*-*-mingw32</a>: MinGW is a native GCC port for 1234 the Win32 subsystem that provides a subset of POSIX. 1235 </li><li>MKS i386-pc-mks: NuTCracker from MKS. See 1236 <a class="uref" href="https://www.mkssoftware.com">https://www.mkssoftware.com</a> for more information. 1237 </li></ul> 1238 1239 <h4 class="subheading" id="Intel-64-bit-versions"><span>Intel 64-bit versions<a class="copiable-link" href="#Intel-64-bit-versions"> ¶</a></span></h4> 1240 <p>GCC contains support for x86-64 using the mingw-w64 1241 runtime library, available from <a class="uref" href="https://www.mingw-w64.org/downloads/">https://www.mingw-w64.org/downloads/</a>. 1242 This library should be used with the target triple x86_64-pc-mingw32. 1243 </p> 1244 <h4 class="subheading" id="Windows-CE"><span>Windows CE<a class="copiable-link" href="#Windows-CE"> ¶</a></span></h4> 1245 <p>Windows CE is supported as a target only on Hitachi 1246 SuperH (sh-wince-pe), and MIPS (mips-wince-pe). 1247 </p> 1248 <h4 class="subheading" id="Other-Windows-Platforms"><span>Other Windows Platforms<a class="copiable-link" href="#Other-Windows-Platforms"> ¶</a></span></h4> 1249 <p>GCC no longer supports Windows NT on the Alpha or PowerPC. 1250 </p> 1251 <p>GCC no longer supports the Windows POSIX subsystem. However, it does 1252 support the Interix subsystem. See above. 1253 </p> 1254 <p>Old target names including *-*-winnt and *-*-windowsnt are no longer used. 1255 </p> 1256 <p>UWIN support has been removed due to a lack of maintenance. 1257 </p> 1258 <hr /> 1259 <a class="anchor" id="x-x-cygwin"></a><h3 class="heading" id="g_t*-*-cygwin"><span>*-*-cygwin<a class="copiable-link" href="#g_t*-*-cygwin"> ¶</a></span></h3> 1260 <p>Ports of GCC are included with the 1261 <a class="uref" href="http://www.cygwin.com/">Cygwin environment</a>. 1262 </p> 1263 <p>GCC will build under Cygwin without modification; it does not build 1264 with Microsoft’s C++ compiler and there are no plans to make it do so. 1265 </p> 1266 <p>The Cygwin native compiler can be configured to target any 32-bit x86 1267 cpu architecture desired; the default is i686-pc-cygwin. It should be 1268 used with as up-to-date a version of binutils as possible; use either 1269 the latest official GNU binutils release in the Cygwin distribution, 1270 or version 2.20 or above if building your own. 1271 </p> 1272 <hr /> 1273 <a class="anchor" id="x-x-mingw32"></a><h3 class="heading" id="g_t*-*-mingw32"><span>*-*-mingw32<a class="copiable-link" href="#g_t*-*-mingw32"> ¶</a></span></h3> 1274 <p>GCC will build with and support only MinGW runtime 3.12 and later. 1275 Earlier versions of headers are incompatible with the new default semantics 1276 of <code class="code">extern inline</code> in <code class="code">-std=c99</code> and <code class="code">-std=gnu99</code> modes. 1277 </p> 1278 <p>To support emitting DWARF debugging info you need to use GNU binutils 1279 version 2.16 or above containing support for the <code class="code">.secrel32</code> 1280 assembler pseudo-op. 1281 </p> 1282 <hr /> 1283 <a class="anchor" id="older"></a><h3 class="heading" id="Older-systems"><span>Older systems<a class="copiable-link" href="#Older-systems"> ¶</a></span></h3> 1284 <p>GCC contains support files for many older (1980s and early 1285 1990s) Unix variants. For the most part, support for these systems 1286 has not been deliberately removed, but it has not been maintained for 1287 several years and may suffer from bitrot. 1288 </p> 1289 <p>Starting with GCC 3.1, each release has a list of “obsoleted” systems. 1290 Support for these systems is still present in that release, but 1291 <code class="command">configure</code> will fail unless the <samp class="option">--enable-obsolete</samp> 1292 option is given. Unless a maintainer steps forward, support for these 1293 systems will be removed from the next release of GCC. 1294 </p> 1295 <p>Support for old systems as hosts for GCC can cause problems if the 1296 workarounds for compiler, library and operating system bugs affect the 1297 cleanliness or maintainability of the rest of GCC. In some cases, to 1298 bring GCC up on such a system, if still possible with current GCC, may 1299 require first installing an old version of GCC which did work on that 1300 system, and using it to compile a more recent GCC, to avoid bugs in the 1301 vendor compiler. Old releases of GCC 1 and GCC 2 are available in the 1302 <samp class="file">old-releases</samp> directory on the <a class="uref" href="../mirrors.html">GCC mirror 1303 sites</a>. Header bugs may generally be avoided using 1304 <code class="command">fixincludes</code>, but bugs or deficiencies in libraries and the 1305 operating system may still cause problems. 1306 </p> 1307 <p>Support for older systems as targets for cross-compilation is less 1308 problematic than support for them as hosts for GCC; if an enthusiast 1309 wishes to make such a target work again (including resurrecting any of 1310 the targets that never worked with GCC 2, starting from the last 1311 version before they were removed), patches 1312 <a class="uref" href="../contribute.html">following the usual requirements</a> would be 1313 likely to be accepted, since they should not affect the support for more 1314 modern targets. 1315 </p> 1316 <p>For some systems, old versions of GNU binutils may also be useful, 1317 and are available from <samp class="file">pub/binutils/old-releases</samp> on 1318 <a class="uref" href="https://sourceware.org/mirrors.html">sourceware.org mirror sites</a>. 1319 </p> 1320 <p>Some of the information on specific systems above relates to 1321 such older systems, but much of the information 1322 about GCC on such systems (which may no longer be applicable to 1323 current GCC) is to be found in the GCC texinfo manual. 1324 </p> 1325 <hr /> 1326 <a class="anchor" id="elf"></a><h3 class="heading" id="all-ELF-targets-_0028SVR4_002c-Solaris_002c-etc_002e_0029"><span>all ELF targets (SVR4, Solaris, etc.)<a class="copiable-link" href="#all-ELF-targets-_0028SVR4_002c-Solaris_002c-etc_002e_0029"> ¶</a></span></h3> 1327 <p>C++ support is significantly better on ELF targets if you use the 1328 <a class="uref" href="./configure.html#with-gnu-ld">GNU linker</a>; duplicate copies of 1329 inlines, vtables and template instantiations will be discarded 1330 automatically. 1331 </p> 1332 1333 <hr /> 1334 <p> 1335 <p><a class="uref" href="./index.html">Return to the GCC Installation page</a> 1336 </p> 1337 1338 1339 1340 1341 1342 </body> 1343 </html> 1344