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25 1.12 mrg <title>Host/Target specific installation notes for GCC</title>
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62 1.8 mrg
63 1.10 mrg <body lang="en">
64 1.12 mrg <h1 class="settitle" align="center">Host/Target specific installation notes for GCC</h1>
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88 1.8 mrg
89 1.10 mrg <a name="index-Specific"></a>
90 1.10 mrg <a name="index-Specific-installation-notes"></a>
91 1.10 mrg <a name="index-Target-specific-installation"></a>
92 1.10 mrg <a name="index-Host-specific-installation"></a>
93 1.10 mrg <a name="index-Target-specific-installation-notes"></a>
94 1.6 mrg
95 1.10 mrg <p>Please read this document carefully <em>before</em> installing the
96 1.10 mrg GNU Compiler Collection on your machine.
97 1.10 mrg </p>
98 1.10 mrg <p>Note that this list of install notes is <em>not</em> a list of supported
99 1.10 mrg hosts or targets. Not all supported hosts and targets are listed
100 1.10 mrg here, only the ones that require host-specific or target-specific
101 1.10 mrg information have to.
102 1.10 mrg </p>
103 1.10 mrg <ul>
104 1.10 mrg <li> <a href="#aarch64-x-x">aarch64*-*-*</a>
105 1.10 mrg </li><li> <a href="#alpha-x-x">alpha*-*-*</a>
106 1.12 mrg </li><li> <a href="#amd64-x-solaris2">amd64-*-solaris2*</a>
107 1.10 mrg </li><li> <a href="#arm-x-eabi">arm-*-eabi</a>
108 1.10 mrg </li><li> <a href="#avr">avr</a>
109 1.10 mrg </li><li> <a href="#bfin">Blackfin</a>
110 1.10 mrg </li><li> <a href="#dos">DOS</a>
111 1.10 mrg </li><li> <a href="#x-x-freebsd">*-*-freebsd*</a>
112 1.10 mrg </li><li> <a href="#h8300-hms">h8300-hms</a>
113 1.10 mrg </li><li> <a href="#hppa-hp-hpux">hppa*-hp-hpux*</a>
114 1.10 mrg </li><li> <a href="#hppa-hp-hpux10">hppa*-hp-hpux10</a>
115 1.10 mrg </li><li> <a href="#hppa-hp-hpux11">hppa*-hp-hpux11</a>
116 1.10 mrg </li><li> <a href="#x-x-linux-gnu">*-*-linux-gnu</a>
117 1.10 mrg </li><li> <a href="#ix86-x-linux">i?86-*-linux*</a>
118 1.12 mrg </li><li> <a href="#ix86-x-solaris2">i?86-*-solaris2*</a>
119 1.10 mrg </li><li> <a href="#ia64-x-linux">ia64-*-linux</a>
120 1.10 mrg </li><li> <a href="#ia64-x-hpux">ia64-*-hpux*</a>
121 1.10 mrg </li><li> <a href="#x-ibm-aix">*-ibm-aix*</a>
122 1.10 mrg </li><li> <a href="#iq2000-x-elf">iq2000-*-elf</a>
123 1.10 mrg </li><li> <a href="#lm32-x-elf">lm32-*-elf</a>
124 1.10 mrg </li><li> <a href="#lm32-x-uclinux">lm32-*-uclinux</a>
125 1.10 mrg </li><li> <a href="#m32c-x-elf">m32c-*-elf</a>
126 1.10 mrg </li><li> <a href="#m32r-x-elf">m32r-*-elf</a>
127 1.10 mrg </li><li> <a href="#m68k-x-x">m68k-*-*</a>
128 1.10 mrg </li><li> <a href="#m68k-uclinux">m68k-uclinux</a>
129 1.10 mrg </li><li> <a href="#microblaze-x-elf">microblaze-*-elf</a>
130 1.10 mrg </li><li> <a href="#mips-x-x">mips-*-*</a>
131 1.10 mrg </li><li> <a href="#nds32le-x-elf">nds32le-*-elf</a>
132 1.10 mrg </li><li> <a href="#nds32be-x-elf">nds32be-*-elf</a>
133 1.10 mrg </li><li> <a href="#nvptx-x-none">nvptx-*-none</a>
134 1.11 mrg </li><li> <a href="#or1k-x-elf">or1k-*-elf</a>
135 1.11 mrg </li><li> <a href="#or1k-x-linux">or1k-*-linux</a>
136 1.10 mrg </li><li> <a href="#powerpc-x-x">powerpc*-*-*</a>
137 1.10 mrg </li><li> <a href="#powerpc-x-darwin">powerpc-*-darwin*</a>
138 1.10 mrg </li><li> <a href="#powerpc-x-elf">powerpc-*-elf</a>
139 1.10 mrg </li><li> <a href="#powerpc-x-linux-gnu">powerpc*-*-linux-gnu*</a>
140 1.10 mrg </li><li> <a href="#powerpc-x-netbsd">powerpc-*-netbsd*</a>
141 1.10 mrg </li><li> <a href="#powerpc-x-eabisim">powerpc-*-eabisim</a>
142 1.10 mrg </li><li> <a href="#powerpc-x-eabi">powerpc-*-eabi</a>
143 1.10 mrg </li><li> <a href="#powerpcle-x-elf">powerpcle-*-elf</a>
144 1.10 mrg </li><li> <a href="#powerpcle-x-eabisim">powerpcle-*-eabisim</a>
145 1.10 mrg </li><li> <a href="#powerpcle-x-eabi">powerpcle-*-eabi</a>
146 1.10 mrg </li><li> <a href="#riscv32-x-elf">riscv32-*-elf</a>
147 1.10 mrg </li><li> <a href="#riscv32-x-linux">riscv32-*-linux</a>
148 1.10 mrg </li><li> <a href="#riscv64-x-elf">riscv64-*-elf</a>
149 1.10 mrg </li><li> <a href="#riscv64-x-linux">riscv64-*-linux</a>
150 1.10 mrg </li><li> <a href="#s390-x-linux">s390-*-linux*</a>
151 1.10 mrg </li><li> <a href="#s390x-x-linux">s390x-*-linux*</a>
152 1.10 mrg </li><li> <a href="#s390x-ibm-tpf">s390x-ibm-tpf*</a>
153 1.10 mrg </li><li> <a href="#x-x-solaris2">*-*-solaris2*</a>
154 1.10 mrg </li><li> <a href="#sparc-x-x">sparc*-*-*</a>
155 1.10 mrg </li><li> <a href="#sparc-sun-solaris2">sparc-sun-solaris2*</a>
156 1.10 mrg </li><li> <a href="#sparc-x-linux">sparc-*-linux*</a>
157 1.10 mrg </li><li> <a href="#sparc64-x-solaris2">sparc64-*-solaris2*</a>
158 1.10 mrg </li><li> <a href="#sparcv9-x-solaris2">sparcv9-*-solaris2*</a>
159 1.10 mrg </li><li> <a href="#c6x-x-x">c6x-*-*</a>
160 1.10 mrg </li><li> <a href="#tilegx-x-linux">tilegx-*-linux*</a>
161 1.10 mrg </li><li> <a href="#tilegxbe-x-linux">tilegxbe-*-linux*</a>
162 1.10 mrg </li><li> <a href="#tilepro-x-linux">tilepro-*-linux*</a>
163 1.10 mrg </li><li> <a href="#visium-x-elf">visium-*-elf</a>
164 1.10 mrg </li><li> <a href="#x-x-vxworks">*-*-vxworks*</a>
165 1.10 mrg </li><li> <a href="#x86-64-x-x">x86_64-*-*, amd64-*-*</a>
166 1.12 mrg </li><li> <a href="#x86-64-x-solaris2">x86_64-*-solaris2*</a>
167 1.10 mrg </li><li> <a href="#xtensa-x-elf">xtensa*-*-elf</a>
168 1.10 mrg </li><li> <a href="#xtensa-x-linux">xtensa*-*-linux*</a>
169 1.10 mrg </li><li> <a href="#windows">Microsoft Windows</a>
170 1.10 mrg </li><li> <a href="#x-x-cygwin">*-*-cygwin</a>
171 1.10 mrg </li><li> <a href="#x-x-mingw32">*-*-mingw32</a>
172 1.10 mrg </li><li> <a href="#os2">OS/2</a>
173 1.10 mrg </li><li> <a href="#older">Older systems</a>
174 1.10 mrg </li></ul>
175 1.10 mrg
176 1.10 mrg <ul>
177 1.10 mrg <li> <a href="#elf">all ELF targets</a> (SVR4, Solaris 2, etc.)
178 1.10 mrg </li></ul>
179 1.10 mrg
180 1.10 mrg
181 1.10 mrg <!-- -------- host/target specific issues start here ---------------- -->
182 1.10 mrg <hr />
183 1.10 mrg <a name="aarch64-x-x"></a><a name="aarch64*-*-*"></a>
184 1.10 mrg <h3 class="heading">aarch64*-*-*</h3>
185 1.10 mrg <p>Binutils pre 2.24 does not have support for selecting <samp>-mabi</samp> and
186 1.10 mrg does not support ILP32. If it is used to build GCC 4.9 or later, GCC will
187 1.10 mrg not support option <samp>-mabi=ilp32</samp>.
188 1.10 mrg </p>
189 1.10 mrg <p>To enable a workaround for the Cortex-A53 erratum number 835769 by default
190 1.10 mrg (for all CPUs regardless of -mcpu option given) at configure time use the
191 1.10 mrg <samp>--enable-fix-cortex-a53-835769</samp> option. This will enable the fix by
192 1.10 mrg default and can be explicitly disabled during compilation by passing the
193 1.10 mrg <samp>-mno-fix-cortex-a53-835769</samp> option. Conversely,
194 1.10 mrg <samp>--disable-fix-cortex-a53-835769</samp> will disable the workaround by
195 1.10 mrg default. The workaround is disabled by default if neither of
196 1.10 mrg <samp>--enable-fix-cortex-a53-835769</samp> or
197 1.10 mrg <samp>--disable-fix-cortex-a53-835769</samp> is given at configure time.
198 1.10 mrg </p>
199 1.10 mrg <p>To enable a workaround for the Cortex-A53 erratum number 843419 by default
200 1.10 mrg (for all CPUs regardless of -mcpu option given) at configure time use the
201 1.10 mrg <samp>--enable-fix-cortex-a53-843419</samp> option. This workaround is applied at
202 1.10 mrg link time. Enabling the workaround will cause GCC to pass the relevant option
203 1.10 mrg to the linker. It can be explicitly disabled during compilation by passing the
204 1.10 mrg <samp>-mno-fix-cortex-a53-843419</samp> option. Conversely,
205 1.10 mrg <samp>--disable-fix-cortex-a53-843419</samp> will disable the workaround by default.
206 1.10 mrg The workaround is disabled by default if neither of
207 1.10 mrg <samp>--enable-fix-cortex-a53-843419</samp> or
208 1.10 mrg <samp>--disable-fix-cortex-a53-843419</samp> is given at configure time.
209 1.10 mrg </p>
210 1.11 mrg <p>To enable Branch Target Identification Mechanism and Return Address Signing by
211 1.11 mrg default at configure time use the <samp>--enable-standard-branch-protection</samp>
212 1.11 mrg option. This is equivalent to having <samp>-mbranch-protection=standard</samp>
213 1.11 mrg during compilation. This can be explicitly disabled during compilation by
214 1.11 mrg passing the <samp>-mbranch-protection=none</samp> option which turns off all
215 1.11 mrg types of branch protections. Conversely,
216 1.11 mrg <samp>--disable-standard-branch-protection</samp> will disable both the
217 1.11 mrg protections by default. This mechanism is turned off by default if neither
218 1.11 mrg of the options are given at configure time.
219 1.11 mrg </p>
220 1.10 mrg <hr />
221 1.10 mrg <a name="alpha-x-x"></a><a name="alpha*-*-*"></a>
222 1.10 mrg <h3 class="heading">alpha*-*-*</h3>
223 1.10 mrg <p>This section contains general configuration information for all
224 1.10 mrg Alpha-based platforms using ELF. In addition to reading this
225 1.10 mrg section, please read all other sections that match your target.
226 1.10 mrg </p>
227 1.10 mrg <hr />
228 1.12 mrg <a name="amd64-x-solaris2"></a><a name="amd64-*-solaris2*"></a>
229 1.12 mrg <h3 class="heading">amd64-*-solaris2*</h3>
230 1.12 mrg <p>This is a synonym for ‘<samp>x86_64-*-solaris2*</samp>’.
231 1.10 mrg </p>
232 1.10 mrg <hr />
233 1.12 mrg <a name="amdgcn-x-amdhsa"></a><a name="amdgcn-*-amdhsa"></a>
234 1.12 mrg <h3 class="heading">amdgcn-*-amdhsa</h3>
235 1.11 mrg <p>AMD GCN GPU target.
236 1.11 mrg </p>
237 1.11 mrg <p>Instead of GNU Binutils, you will need to install LLVM 6, or later, and copy
238 1.12 mrg <samp>bin/llvm-mc</samp> to <samp>amdgcn-amdhsa/bin/as</samp>,
239 1.12 mrg <samp>bin/lld</samp> to <samp>amdgcn-amdhsa/bin/ld</samp>,
240 1.12 mrg <samp>bin/llvm-nm</samp> to <samp>amdgcn-amdhsa/bin/nm</samp>, and
241 1.12 mrg <samp>bin/llvm-ar</samp> to both <samp>bin/amdgcn-amdhsa-ar</samp> and
242 1.12 mrg <samp>bin/amdgcn-amdhsa-ranlib</samp>.
243 1.11 mrg </p>
244 1.11 mrg <p>Use Newlib (2019-01-16, or newer).
245 1.11 mrg </p>
246 1.11 mrg <p>To run the binaries, install the HSA Runtime from the
247 1.11 mrg <a href="https://rocm.github.io">ROCm Platform</a>, and use
248 1.12 mrg <samp>libexec/gcc/amdhsa-amdhsa/<var>version</var>/gcn-run</samp> to launch them
249 1.11 mrg on the GPU.
250 1.11 mrg </p>
251 1.11 mrg <hr />
252 1.10 mrg <a name="arc-x-elf32"></a><a name="arc-*-elf32"></a>
253 1.10 mrg <h3 class="heading">arc-*-elf32</h3>
254 1.10 mrg
255 1.10 mrg <p>Use ‘<samp>configure --target=arc-elf32 --with-cpu=<var>cpu</var> --enable-languages="c,c++"</samp>’
256 1.10 mrg to configure GCC, with <var>cpu</var> being one of ‘<samp>arc600</samp>’, ‘<samp>arc601</samp>’,
257 1.10 mrg or ‘<samp>arc700</samp>’.
258 1.10 mrg </p>
259 1.10 mrg <hr />
260 1.10 mrg <a name="arc-linux-uclibc"></a><a name="arc-linux-uclibc-1"></a>
261 1.10 mrg <h3 class="heading">arc-linux-uclibc</h3>
262 1.10 mrg
263 1.10 mrg <p>Use ‘<samp>configure --target=arc-linux-uclibc --with-cpu=arc700 --enable-languages="c,c++"</samp>’ to configure GCC.
264 1.10 mrg </p>
265 1.10 mrg <hr />
266 1.10 mrg <a name="arm-x-eabi"></a><a name="arm-*-eabi"></a>
267 1.10 mrg <h3 class="heading">arm-*-eabi</h3>
268 1.9 mrg <p>ARM-family processors.
269 1.10 mrg </p>
270 1.10 mrg <p>Building the Ada frontend commonly fails (an infinite loop executing
271 1.7 mrg <code>xsinfo</code>) if the host compiler is GNAT 4.8. Host compilers built from the
272 1.7 mrg GNAT 4.6, 4.9 or 5 release branches are known to succeed.
273 1.10 mrg </p>
274 1.10 mrg <hr />
275 1.10 mrg <a name="avr"></a><a name="avr-1"></a>
276 1.10 mrg <h3 class="heading">avr</h3>
277 1.1 mrg <p>ATMEL AVR-family micro controllers. These are used in embedded
278 1.10 mrg applications. There are no standard Unix configurations.
279 1.1 mrg See “AVR Options” in the main manual
280 1.1 mrg for the list of supported MCU types.
281 1.10 mrg </p>
282 1.10 mrg <p>Use ‘<samp>configure --target=avr --enable-languages="c"</samp>’ to configure GCC.
283 1.10 mrg </p>
284 1.10 mrg <p>Further installation notes and other useful information about AVR tools
285 1.1 mrg can also be obtained from:
286 1.10 mrg </p>
287 1.10 mrg <ul>
288 1.10 mrg <li> <a href="http://www.nongnu.org/avr/">http://www.nongnu.org/avr/</a>
289 1.10 mrg </li><li> <a href="http://www.amelek.gda.pl/avr/">http://www.amelek.gda.pl/avr/</a>
290 1.10 mrg </li></ul>
291 1.10 mrg
292 1.10 mrg <p>The following error:
293 1.10 mrg </p><div class="smallexample">
294 1.10 mrg <pre class="smallexample">Error: register required
295 1.10 mrg </pre></div>
296 1.10 mrg
297 1.10 mrg <p>indicates that you should upgrade to a newer version of the binutils.
298 1.10 mrg </p>
299 1.10 mrg <hr />
300 1.10 mrg <a name="bfin"></a><a name="Blackfin"></a>
301 1.10 mrg <h3 class="heading">Blackfin</h3>
302 1.10 mrg <p>The Blackfin processor, an Analog Devices DSP.
303 1.1 mrg See “Blackfin Options” in the main manual
304 1.10 mrg </p>
305 1.10 mrg <p>More information, and a version of binutils with support for this processor,
306 1.12 mrg are available at <a href="https://sourceforge.net/projects/adi-toolchain/">https://sourceforge.net/projects/adi-toolchain/</a>.
307 1.10 mrg </p>
308 1.10 mrg <hr />
309 1.10 mrg <a name="cr16"></a><a name="CR16"></a>
310 1.10 mrg <h3 class="heading">CR16</h3>
311 1.5 mrg <p>The CR16 CompactRISC architecture is a 16-bit architecture. This
312 1.5 mrg architecture is used in embedded applications.
313 1.10 mrg </p>
314 1.3 skrll
315 1.10 mrg <p>See “CR16 Options” in the main manual for a list of CR16-specific options.
316 1.10 mrg </p>
317 1.10 mrg <p>Use ‘<samp>configure --target=cr16-elf --enable-languages=c,c++</samp>’ to configure
318 1.10 mrg GCC for building a CR16 elf cross-compiler.
319 1.10 mrg </p>
320 1.10 mrg <p>Use ‘<samp>configure --target=cr16-uclinux --enable-languages=c,c++</samp>’ to
321 1.10 mrg configure GCC for building a CR16 uclinux cross-compiler.
322 1.10 mrg </p>
323 1.10 mrg <hr />
324 1.10 mrg <a name="cris"></a><a name="CRIS"></a>
325 1.10 mrg <h3 class="heading">CRIS</h3>
326 1.1 mrg <p>CRIS is the CPU architecture in Axis Communications ETRAX system-on-a-chip
327 1.1 mrg series. These are used in embedded applications.
328 1.10 mrg </p>
329 1.10 mrg <p>See “CRIS Options” in the main manual
330 1.1 mrg for a list of CRIS-specific options.
331 1.10 mrg </p>
332 1.10 mrg <p>There are a few different CRIS targets:
333 1.10 mrg </p><dl compact="compact">
334 1.10 mrg <dt><code>cris-axis-elf</code></dt>
335 1.10 mrg <dd><p>Mainly for monolithic embedded systems. Includes a multilib for the
336 1.10 mrg ‘<samp>v10</samp>’ core used in ‘<samp>ETRAX 100 LX</samp>’.
337 1.10 mrg </p></dd>
338 1.10 mrg <dt><code>cris-axis-linux-gnu</code></dt>
339 1.10 mrg <dd><p>A GNU/Linux port for the CRIS architecture, currently targeting
340 1.10 mrg ‘<samp>ETRAX 100 LX</samp>’ by default.
341 1.10 mrg </p></dd>
342 1.1 mrg </dl>
343 1.1 mrg
344 1.10 mrg <p>Pre-packaged tools can be obtained from
345 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
346 1.1 mrg information about this platform is available at
347 1.1 mrg <a href="http://developer.axis.com/">http://developer.axis.com/</a>.
348 1.10 mrg </p>
349 1.10 mrg <hr />
350 1.10 mrg <a name="dos"></a><a name="DOS"></a>
351 1.10 mrg <h3 class="heading">DOS</h3>
352 1.1 mrg <p>Please have a look at the <a href="binaries.html">binaries page</a>.
353 1.10 mrg </p>
354 1.10 mrg <p>You cannot install GCC by itself on MSDOS; it will not compile under
355 1.1 mrg any MSDOS compiler except itself. You need to get the complete
356 1.1 mrg compilation package DJGPP, which includes binaries as well as sources,
357 1.1 mrg and includes all the necessary compilation tools and libraries.
358 1.10 mrg </p>
359 1.10 mrg <hr />
360 1.10 mrg <a name="epiphany-x-elf"></a><a name="epiphany-*-elf"></a>
361 1.10 mrg <h3 class="heading">epiphany-*-elf</h3>
362 1.10 mrg <p>Adapteva Epiphany.
363 1.3 skrll This configuration is intended for embedded systems.
364 1.10 mrg </p>
365 1.10 mrg <hr />
366 1.10 mrg <a name="x-x-freebsd"></a><a name="g_t*-*-freebsd*"></a>
367 1.10 mrg <h3 class="heading">*-*-freebsd*</h3>
368 1.1 mrg <p>Support for FreeBSD 1 was discontinued in GCC 3.2. Support for
369 1.1 mrg FreeBSD 2 (and any mutant a.out variants of FreeBSD 3) was
370 1.1 mrg discontinued in GCC 4.0.
371 1.10 mrg </p>
372 1.10 mrg <p>In order to better utilize FreeBSD base system functionality and match
373 1.3 skrll the configuration of the system compiler, GCC 4.5 and above as well as
374 1.3 skrll GCC 4.4 past 2010-06-20 leverage SSP support in libc (which is present
375 1.3 skrll on FreeBSD 7 or later) and the use of <code>__cxa_atexit</code> by default
376 1.3 skrll (on FreeBSD 6 or later). The use of <code>dl_iterate_phdr</code> inside
377 1.10 mrg <samp>libgcc_s.so.1</samp> and boehm-gc (on FreeBSD 7 or later) is enabled
378 1.3 skrll by GCC 4.5 and above.
379 1.10 mrg </p>
380 1.10 mrg <p>We support FreeBSD using the ELF file format with DWARF 2 debugging
381 1.10 mrg for all CPU architectures. You may use <samp>-gstabs</samp> instead of
382 1.10 mrg <samp>-g</samp>, if you really want the old debugging format. There are
383 1.1 mrg no known issues with mixing object files and libraries with different
384 1.1 mrg debugging formats. Otherwise, this release of GCC should now match
385 1.1 mrg more of the configuration used in the stock FreeBSD configuration of
386 1.10 mrg GCC. In particular, <samp>--enable-threads</samp> is now configured by
387 1.1 mrg default. However, as a general user, do not attempt to replace the
388 1.1 mrg system compiler with this release. Known to bootstrap and check with
389 1.1 mrg good results on FreeBSD 7.2-STABLE. In the past, known to bootstrap
390 1.1 mrg and check with good results on FreeBSD 3.0, 3.4, 4.0, 4.2, 4.3, 4.4,
391 1.1 mrg 4.5, 4.8, 4.9 and 5-CURRENT.
392 1.10 mrg </p>
393 1.10 mrg <p>The version of binutils installed in <samp>/usr/bin</samp> probably works
394 1.1 mrg with this release of GCC. Bootstrapping against the latest GNU
395 1.10 mrg binutils and/or the version found in <samp>/usr/ports/devel/binutils</samp> has
396 1.1 mrg been known to enable additional features and improve overall testsuite
397 1.9 mrg results. However, it is currently known that boehm-gc may not configure
398 1.9 mrg properly on FreeBSD prior to the FreeBSD 7.0 release with GNU binutils
399 1.9 mrg after 2.16.1.
400 1.10 mrg </p>
401 1.10 mrg <hr />
402 1.10 mrg <a name="ft32-x-elf"></a><a name="ft32-*-elf"></a>
403 1.10 mrg <h3 class="heading">ft32-*-elf</h3>
404 1.10 mrg <p>The FT32 processor.
405 1.7 mrg This configuration is intended for embedded systems.
406 1.10 mrg </p>
407 1.10 mrg <hr />
408 1.10 mrg <a name="h8300-hms"></a><a name="h8300-hms-1"></a>
409 1.10 mrg <h3 class="heading">h8300-hms</h3>
410 1.1 mrg <p>Renesas H8/300 series of processors.
411 1.10 mrg </p>
412 1.10 mrg <p>Please have a look at the <a href="binaries.html">binaries page</a>.
413 1.10 mrg </p>
414 1.10 mrg <p>The calling convention and structure layout has changed in release 2.6.
415 1.1 mrg All code must be recompiled. The calling convention now passes the
416 1.1 mrg first three arguments in function calls in registers. Structures are no
417 1.1 mrg longer a multiple of 2 bytes.
418 1.10 mrg </p>
419 1.10 mrg <hr />
420 1.10 mrg <a name="hppa-hp-hpux"></a><a name="hppa*-hp-hpux*"></a>
421 1.10 mrg <h3 class="heading">hppa*-hp-hpux*</h3>
422 1.1 mrg <p>Support for HP-UX version 9 and older was discontinued in GCC 3.4.
423 1.10 mrg </p>
424 1.10 mrg <p>We require using gas/binutils on all hppa platforms. Version 2.19 or
425 1.1 mrg later is recommended.
426 1.10 mrg </p>
427 1.10 mrg <p>It may be helpful to configure GCC with the
428 1.10 mrg <a href="./configure.html#with-gnu-as"><samp>--with-gnu-as</samp></a> and
429 1.10 mrg <samp>--with-as=…</samp> options to ensure that GCC can find GAS.
430 1.10 mrg </p>
431 1.10 mrg <p>The HP assembler should not be used with GCC. It is rarely tested and may
432 1.10 mrg not work. It shouldn’t be used with any languages other than C due to its
433 1.1 mrg many limitations.
434 1.10 mrg </p>
435 1.10 mrg <p>Specifically, <samp>-g</samp> does not work (HP-UX uses a peculiar debugging
436 1.1 mrg format which GCC does not know about). It also inserts timestamps
437 1.1 mrg into each object file it creates, causing the 3-stage comparison test to
438 1.1 mrg fail during a bootstrap. You should be able to continue by saying
439 1.10 mrg ‘<samp>make all-host all-target</samp>’ after getting the failure from ‘<samp>make</samp>’.
440 1.10 mrg </p>
441 1.10 mrg <p>Various GCC features are not supported. For example, it does not support weak
442 1.1 mrg symbols or alias definitions. As a result, explicit template instantiations
443 1.1 mrg are required when using C++. This makes it difficult if not impossible to
444 1.1 mrg build many C++ applications.
445 1.10 mrg </p>
446 1.10 mrg <p>There are two default scheduling models for instructions. These are
447 1.1 mrg PROCESSOR_7100LC and PROCESSOR_8000. They are selected from the pa-risc
448 1.10 mrg architecture specified for the target machine when configuring.
449 1.1 mrg PROCESSOR_8000 is the default. PROCESSOR_7100LC is selected when
450 1.10 mrg the target is a ‘<samp>hppa1*</samp>’ machine.
451 1.10 mrg </p>
452 1.10 mrg <p>The PROCESSOR_8000 model is not well suited to older processors. Thus,
453 1.1 mrg it is important to completely specify the machine architecture when
454 1.1 mrg configuring if you want a model other than PROCESSOR_8000. The macro
455 1.1 mrg TARGET_SCHED_DEFAULT can be defined in BOOT_CFLAGS if a different
456 1.1 mrg default scheduling model is desired.
457 1.10 mrg </p>
458 1.10 mrg <p>As of GCC 4.0, GCC uses the UNIX 95 namespace for HP-UX 10.10
459 1.10 mrg through 11.00, and the UNIX 98 namespace for HP-UX 11.11 and later.
460 1.1 mrg This namespace change might cause problems when bootstrapping with
461 1.1 mrg an earlier version of GCC or the HP compiler as essentially the same
462 1.1 mrg namespace is required for an entire build. This problem can be avoided
463 1.10 mrg in a number of ways. With HP cc, <code>UNIX_STD</code> can be set to ‘<samp>95</samp>’
464 1.10 mrg or ‘<samp>98</samp>’. Another way is to add an appropriate set of predefines
465 1.10 mrg to <code>CC</code>. The description for the <samp>munix=</samp> option contains
466 1.1 mrg a list of the predefines used with each standard.
467 1.10 mrg </p>
468 1.10 mrg <p>More specific information to ‘<samp>hppa*-hp-hpux*</samp>’ targets follows.
469 1.10 mrg </p>
470 1.10 mrg <hr />
471 1.10 mrg <a name="hppa-hp-hpux10"></a><a name="hppa*-hp-hpux10"></a>
472 1.10 mrg <h3 class="heading">hppa*-hp-hpux10</h3>
473 1.1 mrg <p>For hpux10.20, we <em>highly</em> recommend you pick up the latest sed patch
474 1.1 mrg <code>PHCO_19798</code> from HP.
475 1.10 mrg </p>
476 1.10 mrg <p>The C++ ABI has changed incompatibly in GCC 4.0. COMDAT subspaces are
477 1.1 mrg used for one-only code and data. This resolves many of the previous
478 1.1 mrg problems in using C++ on this target. However, the ABI is not compatible
479 1.1 mrg with the one implemented under HP-UX 11 using secondary definitions.
480 1.10 mrg </p>
481 1.10 mrg <hr />
482 1.10 mrg <a name="hppa-hp-hpux11"></a><a name="hppa*-hp-hpux11"></a>
483 1.10 mrg <h3 class="heading">hppa*-hp-hpux11</h3>
484 1.1 mrg <p>GCC 3.0 and up support HP-UX 11. GCC 2.95.x is not supported and cannot
485 1.1 mrg be used to compile GCC 3.0 and up.
486 1.10 mrg </p>
487 1.10 mrg <p>The libffi library haven’t been ported to 64-bit HP-UX and doesn’t build.
488 1.10 mrg </p>
489 1.10 mrg <p>Refer to <a href="binaries.html">binaries</a> for information about obtaining
490 1.1 mrg precompiled GCC binaries for HP-UX. Precompiled binaries must be obtained
491 1.9 mrg to build the Ada language as it cannot be bootstrapped using C. Ada is
492 1.1 mrg only available for the 32-bit PA-RISC runtime.
493 1.10 mrg </p>
494 1.10 mrg <p>Starting with GCC 3.4 an ISO C compiler is required to bootstrap. The
495 1.10 mrg bundled compiler supports only traditional C; you will need either HP’s
496 1.1 mrg unbundled compiler, or a binary distribution of GCC.
497 1.10 mrg </p>
498 1.10 mrg <p>It is possible to build GCC 3.3 starting with the bundled HP compiler,
499 1.1 mrg but the process requires several steps. GCC 3.3 can then be used to
500 1.9 mrg build later versions.
501 1.10 mrg </p>
502 1.10 mrg <p>There are several possible approaches to building the distribution.
503 1.1 mrg Binutils can be built first using the HP tools. Then, the GCC
504 1.1 mrg distribution can be built. The second approach is to build GCC
505 1.10 mrg first using the HP tools, then build binutils, then rebuild GCC.
506 1.1 mrg There have been problems with various binary distributions, so it
507 1.1 mrg is best not to start from a binary distribution.
508 1.10 mrg </p>
509 1.10 mrg <p>On 64-bit capable systems, there are two distinct targets. Different
510 1.1 mrg installation prefixes must be used if both are to be installed on
511 1.10 mrg the same system. The ‘<samp>hppa[1-2]*-hp-hpux11*</samp>’ target generates code
512 1.10 mrg for the 32-bit PA-RISC runtime architecture and uses the HP linker.
513 1.10 mrg The ‘<samp>hppa64-hp-hpux11*</samp>’ target generates 64-bit code for the
514 1.1 mrg PA-RISC 2.0 architecture.
515 1.10 mrg </p>
516 1.10 mrg <p>The script config.guess now selects the target type based on the compiler
517 1.10 mrg detected during configuration. You must define <code>PATH</code> or <code>CC</code> so
518 1.10 mrg that configure finds an appropriate compiler for the initial bootstrap.
519 1.10 mrg When <code>CC</code> is used, the definition should contain the options that are
520 1.10 mrg needed whenever <code>CC</code> is used.
521 1.10 mrg </p>
522 1.10 mrg <p>Specifically, options that determine the runtime architecture must be
523 1.10 mrg in <code>CC</code> to correctly select the target for the build. It is also
524 1.10 mrg convenient to place many other compiler options in <code>CC</code>. For example,
525 1.10 mrg <code>CC="cc -Ac +DA2.0W -Wp,-H16376 -D_CLASSIC_TYPES -D_HPUX_SOURCE"</code>
526 1.1 mrg can be used to bootstrap the GCC 3.3 branch with the HP compiler in
527 1.10 mrg 64-bit K&R/bundled mode. The <samp>+DA2.0W</samp> option will result in
528 1.10 mrg the automatic selection of the ‘<samp>hppa64-hp-hpux11*</samp>’ target. The
529 1.1 mrg macro definition table of cpp needs to be increased for a successful
530 1.1 mrg build with the HP compiler. _CLASSIC_TYPES and _HPUX_SOURCE need to
531 1.1 mrg be defined when building with the bundled compiler, or when using the
532 1.10 mrg <samp>-Ac</samp> option. These defines aren’t necessary with <samp>-Ae</samp>.
533 1.10 mrg </p>
534 1.10 mrg <p>It is best to explicitly configure the ‘<samp>hppa64-hp-hpux11*</samp>’ target
535 1.10 mrg with the <samp>--with-ld=…</samp> option. This overrides the standard
536 1.1 mrg search for ld. The two linkers supported on this target require different
537 1.1 mrg commands. The default linker is determined during configuration. As a
538 1.10 mrg result, it’s not possible to switch linkers in the middle of a GCC build.
539 1.1 mrg This has been reported to sometimes occur in unified builds of binutils
540 1.1 mrg and GCC.
541 1.10 mrg </p>
542 1.10 mrg <p>A recent linker patch must be installed for the correct operation of
543 1.1 mrg GCC 3.3 and later. <code>PHSS_26559</code> and <code>PHSS_24304</code> are the
544 1.1 mrg oldest linker patches that are known to work. They are for HP-UX
545 1.1 mrg 11.00 and 11.11, respectively. <code>PHSS_24303</code>, the companion to
546 1.10 mrg <code>PHSS_24304</code>, might be usable but it hasn’t been tested. These
547 1.1 mrg patches have been superseded. Consult the HP patch database to obtain
548 1.1 mrg the currently recommended linker patch for your system.
549 1.10 mrg </p>
550 1.10 mrg <p>The patches are necessary for the support of weak symbols on the
551 1.1 mrg 32-bit port, and for the running of initializers and finalizers. Weak
552 1.1 mrg symbols are implemented using SOM secondary definition symbols. Prior
553 1.10 mrg to HP-UX 11, there are bugs in the linker support for secondary symbols.
554 1.1 mrg The patches correct a problem of linker core dumps creating shared
555 1.1 mrg libraries containing secondary symbols, as well as various other
556 1.1 mrg linking issues involving secondary symbols.
557 1.10 mrg </p>
558 1.10 mrg <p>GCC 3.3 uses the ELF DT_INIT_ARRAY and DT_FINI_ARRAY capabilities to
559 1.1 mrg run initializers and finalizers on the 64-bit port. The 32-bit port
560 1.10 mrg uses the linker <samp>+init</samp> and <samp>+fini</samp> options for the same
561 1.1 mrg purpose. The patches correct various problems with the +init/+fini
562 1.1 mrg options, including program core dumps. Binutils 2.14 corrects a
563 1.10 mrg problem on the 64-bit port resulting from HP’s non-standard use of
564 1.1 mrg the .init and .fini sections for array initializers and finalizers.
565 1.10 mrg </p>
566 1.10 mrg <p>Although the HP and GNU linkers are both supported for the
567 1.10 mrg ‘<samp>hppa64-hp-hpux11*</samp>’ target, it is strongly recommended that the
568 1.1 mrg HP linker be used for link editing on this target.
569 1.10 mrg </p>
570 1.10 mrg <p>At this time, the GNU linker does not support the creation of long
571 1.9 mrg branch stubs. As a result, it cannot successfully link binaries
572 1.1 mrg containing branch offsets larger than 8 megabytes. In addition,
573 1.1 mrg there are problems linking shared libraries, linking executables
574 1.10 mrg with <samp>-static</samp>, and with dwarf2 unwind and exception support.
575 1.10 mrg It also doesn’t provide stubs for internal calls to global functions
576 1.9 mrg in shared libraries, so these calls cannot be overloaded.
577 1.10 mrg </p>
578 1.10 mrg <p>The HP dynamic loader does not support GNU symbol versioning, so symbol
579 1.1 mrg versioning is not supported. It may be necessary to disable symbol
580 1.10 mrg versioning with <samp>--disable-symvers</samp> when using GNU ld.
581 1.10 mrg </p>
582 1.10 mrg <p>POSIX threads are the default. The optional DCE thread library is not
583 1.10 mrg supported, so <samp>--enable-threads=dce</samp> does not work.
584 1.10 mrg </p>
585 1.10 mrg <hr />
586 1.10 mrg <a name="x-x-linux-gnu"></a><a name="g_t*-*-linux-gnu"></a>
587 1.10 mrg <h3 class="heading">*-*-linux-gnu</h3>
588 1.1 mrg <p>Versions of libstdc++-v3 starting with 3.2.1 require bug fixes present
589 1.1 mrg in glibc 2.2.5 and later. More information is available in the
590 1.1 mrg libstdc++-v3 documentation.
591 1.10 mrg </p>
592 1.10 mrg <hr />
593 1.10 mrg <a name="ix86-x-linux"></a><a name="i_003f86-*-linux*"></a>
594 1.10 mrg <h3 class="heading">i?86-*-linux*</h3>
595 1.10 mrg <p>As of GCC 3.3, binutils 2.13.1 or later is required for this platform.
596 1.1 mrg See <a href="http://gcc.gnu.org/PR10877">bug 10877</a> for more information.
597 1.10 mrg </p>
598 1.10 mrg <p>If you receive Signal 11 errors when building on GNU/Linux, then it is
599 1.1 mrg possible you have a hardware problem. Further information on this can be
600 1.1 mrg found on <a href="http://www.bitwizard.nl/sig11/">www.bitwizard.nl</a>.
601 1.10 mrg </p>
602 1.10 mrg <hr />
603 1.12 mrg <a name="ix86-x-solaris2"></a><a name="i_003f86-*-solaris2*"></a>
604 1.12 mrg <h3 class="heading">i?86-*-solaris2*</h3>
605 1.12 mrg <p>Use this for Solaris 11.3 or later on x86 and x86-64 systems. Starting
606 1.12 mrg with GCC 4.7, there is also a 64-bit ‘<samp>amd64-*-solaris2*</samp>’ or
607 1.12 mrg ‘<samp>x86_64-*-solaris2*</samp>’ configuration that corresponds to
608 1.10 mrg ‘<samp>sparcv9-sun-solaris2*</samp>’.
609 1.10 mrg </p>
610 1.10 mrg <p>It is recommended that you configure GCC to use the GNU assembler. The
611 1.12 mrg versions included in Solaris 11.3, from GNU binutils 2.23.1 or
612 1.12 mrg newer (available as <samp>/usr/bin/gas</samp> and
613 1.10 mrg <samp>/usr/gnu/bin/as</samp>), work fine. The current version, from GNU
614 1.12 mrg binutils 2.34, is known to work. Recent versions of the Solaris assembler in
615 1.12 mrg <samp>/usr/bin/as</samp> work almost as well, though.
616 1.12 mrg </p>
617 1.12 mrg <p>For linking, the Solaris linker is preferred. If you want to use the GNU
618 1.12 mrg linker instead, the version in Solaris 11.3, from GNU binutils 2.23.1 or
619 1.12 mrg newer (in <samp>/usr/gnu/bin/ld</samp> and <samp>/usr/bin/gld</samp>), works,
620 1.12 mrg as does the latest version, from GNU binutils 2.34.
621 1.10 mrg </p>
622 1.10 mrg <p>To use GNU <code>as</code>, configure with the options
623 1.12 mrg <samp>--with-gnu-as --with-as=/usr/gnu/bin/as</samp>. It may be necessary
624 1.10 mrg to configure with <samp>--without-gnu-ld --with-ld=/usr/ccs/bin/ld</samp> to
625 1.12 mrg guarantee use of Solaris <code>ld</code>.
626 1.10 mrg </p>
627 1.10 mrg <hr />
628 1.10 mrg <a name="ia64-x-linux"></a><a name="ia64-*-linux"></a>
629 1.10 mrg <h3 class="heading">ia64-*-linux</h3>
630 1.1 mrg <p>IA-64 processor (also known as IPF, or Itanium Processor Family)
631 1.1 mrg running GNU/Linux.
632 1.10 mrg </p>
633 1.10 mrg <p>If you are using the installed system libunwind library with
634 1.10 mrg <samp>--with-system-libunwind</samp>, then you must use libunwind 0.98 or
635 1.1 mrg later.
636 1.10 mrg </p>
637 1.10 mrg <p>None of the following versions of GCC has an ABI that is compatible
638 1.1 mrg with any of the other versions in this list, with the exception that
639 1.1 mrg Red Hat 2.96 and Trillian 000171 are compatible with each other:
640 1.10 mrg 3.1, 3.0.2, 3.0.1, 3.0, Red Hat 2.96, and Trillian 000717.
641 1.10 mrg This primarily affects C++ programs and programs that create shared libraries.
642 1.10 mrg GCC 3.1 or later is recommended for compiling linux, the kernel.
643 1.1 mrg As of version 3.1 GCC is believed to be fully ABI compliant, and hence no
644 1.1 mrg more major ABI changes are expected.
645 1.10 mrg </p>
646 1.10 mrg <hr />
647 1.10 mrg <a name="ia64-x-hpux"></a><a name="ia64-*-hpux*"></a>
648 1.10 mrg <h3 class="heading">ia64-*-hpux*</h3>
649 1.1 mrg <p>Building GCC on this target requires the GNU Assembler. The bundled HP
650 1.1 mrg assembler will not work. To prevent GCC from using the wrong assembler,
651 1.10 mrg the option <samp>--with-gnu-as</samp> may be necessary.
652 1.10 mrg </p>
653 1.10 mrg <p>The GCC libunwind library has not been ported to HPUX. This means that for
654 1.10 mrg GCC versions 3.2.3 and earlier, <samp>--enable-libunwind-exceptions</samp>
655 1.10 mrg is required to build GCC. For GCC 3.3 and later, this is the default.
656 1.10 mrg For gcc 3.4.3 and later, <samp>--enable-libunwind-exceptions</samp> is
657 1.1 mrg removed and the system libunwind library will always be used.
658 1.10 mrg </p>
659 1.10 mrg <hr />
660 1.10 mrg <!-- rs6000-ibm-aix*, powerpc-ibm-aix* -->
661 1.10 mrg <a name="x-ibm-aix"></a><a name="g_t*-ibm-aix*"></a>
662 1.10 mrg <h3 class="heading">*-ibm-aix*</h3>
663 1.10 mrg <p>Support for AIX version 3 and older was discontinued in GCC 3.4.
664 1.1 mrg Support for AIX version 4.2 and older was discontinued in GCC 4.5.
665 1.10 mrg </p>
666 1.10 mrg <p>“out of memory” bootstrap failures may indicate a problem with
667 1.1 mrg process resource limits (ulimit). Hard limits are configured in the
668 1.10 mrg <samp>/etc/security/limits</samp> system configuration file.
669 1.10 mrg </p>
670 1.10 mrg <p>GCC 4.9 and above require a C++ compiler for bootstrap. IBM VAC++ / xlC
671 1.7 mrg cannot bootstrap GCC. xlc can bootstrap an older version of GCC and
672 1.7 mrg G++ can bootstrap recent releases of GCC.
673 1.10 mrg </p>
674 1.10 mrg <p>GCC can bootstrap with recent versions of IBM XLC, but bootstrapping
675 1.1 mrg with an earlier release of GCC is recommended. Bootstrapping with XLC
676 1.1 mrg requires a larger data segment, which can be enabled through the
677 1.1 mrg <var>LDR_CNTRL</var> environment variable, e.g.,
678 1.10 mrg </p>
679 1.10 mrg <div class="smallexample">
680 1.10 mrg <pre class="smallexample">% LDR_CNTRL=MAXDATA=0x50000000
681 1.10 mrg % export LDR_CNTRL
682 1.10 mrg </pre></div>
683 1.1 mrg
684 1.10 mrg <p>One can start with a pre-compiled version of GCC to build from
685 1.10 mrg sources. One may delete GCC’s “fixed” header files when starting
686 1.1 mrg with a version of GCC built for an earlier release of AIX.
687 1.10 mrg </p>
688 1.10 mrg <p>To speed up the configuration phases of bootstrapping and installing GCC,
689 1.10 mrg one may use GNU Bash instead of AIX <code>/bin/sh</code>, e.g.,
690 1.10 mrg </p>
691 1.10 mrg <div class="smallexample">
692 1.10 mrg <pre class="smallexample">% CONFIG_SHELL=/opt/freeware/bin/bash
693 1.10 mrg % export CONFIG_SHELL
694 1.10 mrg </pre></div>
695 1.1 mrg
696 1.10 mrg <p>and then proceed as described in <a href="build.html">the build
697 1.10 mrg instructions</a>, where we strongly recommend specifying an absolute path
698 1.1 mrg to invoke <var>srcdir</var>/configure.
699 1.10 mrg </p>
700 1.10 mrg <p>Because GCC on AIX is built as a 32-bit executable by default,
701 1.1 mrg (although it can generate 64-bit programs) the GMP and MPFR libraries
702 1.1 mrg required by gfortran must be 32-bit libraries. Building GMP and MPFR
703 1.1 mrg as static archive libraries works better than shared libraries.
704 1.10 mrg </p>
705 1.10 mrg <p>Errors involving <code>alloca</code> when building GCC generally are due
706 1.1 mrg to an incorrect definition of <code>CC</code> in the Makefile or mixing files
707 1.1 mrg compiled with the native C compiler and GCC. During the stage1 phase of
708 1.10 mrg the build, the native AIX compiler <strong>must</strong> be invoked as <code>cc</code>
709 1.10 mrg (not <code>xlc</code>). Once <code>configure</code> has been informed of
710 1.10 mrg <code>xlc</code>, one needs to use ‘<samp>make distclean</samp>’ to remove the
711 1.10 mrg configure cache files and ensure that <code>CC</code> environment variable
712 1.10 mrg does not provide a definition that will confuse <code>configure</code>.
713 1.1 mrg If this error occurs during stage2 or later, then the problem most likely
714 1.1 mrg is the version of Make (see above).
715 1.10 mrg </p>
716 1.10 mrg <p>The native <code>as</code> and <code>ld</code> are recommended for
717 1.3 skrll bootstrapping on AIX. The GNU Assembler, GNU Linker, and GNU
718 1.3 skrll Binutils version 2.20 is the minimum level that supports bootstrap on
719 1.10 mrg AIX 5. The GNU Assembler has not been updated to support AIX 6 or
720 1.3 skrll AIX 7. The native AIX tools do interoperate with GCC.
721 1.10 mrg </p>
722 1.10 mrg <p>AIX 7.1 added partial support for DWARF debugging, but full support
723 1.7 mrg requires AIX 7.1 TL03 SP7 that supports additional DWARF sections and
724 1.7 mrg fixes a bug in the assembler. AIX 7.1 TL03 SP5 distributed a version
725 1.7 mrg of libm.a missing important symbols; a fix for IV77796 will be
726 1.7 mrg included in SP6.
727 1.10 mrg </p>
728 1.10 mrg <p>AIX 5.3 TL10, AIX 6.1 TL05 and AIX 7.1 TL00 introduced an AIX
729 1.3 skrll assembler change that sometimes produces corrupt assembly files
730 1.3 skrll causing AIX linker errors. The bug breaks GCC bootstrap on AIX and
731 1.3 skrll can cause compilation failures with existing GCC installations. An
732 1.3 skrll AIX iFix for AIX 5.3 is available (APAR IZ98385 for AIX 5.3 TL10, APAR
733 1.3 skrll IZ98477 for AIX 5.3 TL11 and IZ98134 for AIX 5.3 TL12). AIX 5.3 TL11 SP8,
734 1.3 skrll AIX 5.3 TL12 SP5, AIX 6.1 TL04 SP11, AIX 6.1 TL05 SP7, AIX 6.1 TL06 SP6,
735 1.3 skrll AIX 6.1 TL07 and AIX 7.1 TL01 should include the fix.
736 1.10 mrg </p>
737 1.10 mrg <p>Building <samp>libstdc++.a</samp> requires a fix for an AIX Assembler bug
738 1.1 mrg APAR IY26685 (AIX 4.3) or APAR IY25528 (AIX 5.1). It also requires a
739 1.1 mrg fix for another AIX Assembler bug and a co-dependent AIX Archiver fix
740 1.1 mrg referenced as APAR IY53606 (AIX 5.2) or as APAR IY54774 (AIX 5.1)
741 1.10 mrg </p>
742 1.10 mrg <a name="TransferAixShobj"></a><p>‘<samp>libstdc++</samp>’ in GCC 3.4 increments the major version number of the
743 1.10 mrg shared object and GCC installation places the <samp>libstdc++.a</samp>
744 1.1 mrg shared library in a common location which will overwrite the and GCC
745 1.1 mrg 3.3 version of the shared library. Applications either need to be
746 1.1 mrg re-linked against the new shared library or the GCC 3.1 and GCC 3.3
747 1.10 mrg versions of the ‘<samp>libstdc++</samp>’ shared object needs to be available
748 1.10 mrg to the AIX runtime loader. The GCC 3.1 ‘<samp>libstdc++.so.4</samp>’, if
749 1.10 mrg present, and GCC 3.3 ‘<samp>libstdc++.so.5</samp>’ shared objects can be
750 1.1 mrg installed for runtime dynamic loading using the following steps to set
751 1.10 mrg the ‘<samp>F_LOADONLY</samp>’ flag in the shared object for <em>each</em>
752 1.10 mrg multilib <samp>libstdc++.a</samp> installed:
753 1.10 mrg </p>
754 1.10 mrg <p>Extract the shared objects from the currently installed
755 1.10 mrg <samp>libstdc++.a</samp> archive:
756 1.10 mrg </p><div class="smallexample">
757 1.10 mrg <pre class="smallexample">% ar -x libstdc++.a libstdc++.so.4 libstdc++.so.5
758 1.10 mrg </pre></div>
759 1.1 mrg
760 1.10 mrg <p>Enable the ‘<samp>F_LOADONLY</samp>’ flag so that the shared object will be
761 1.1 mrg available for runtime dynamic loading, but not linking:
762 1.10 mrg </p><div class="smallexample">
763 1.10 mrg <pre class="smallexample">% strip -e libstdc++.so.4 libstdc++.so.5
764 1.10 mrg </pre></div>
765 1.10 mrg
766 1.10 mrg <p>Archive the runtime-only shared object in the GCC 3.4
767 1.10 mrg <samp>libstdc++.a</samp> archive:
768 1.10 mrg </p><div class="smallexample">
769 1.10 mrg <pre class="smallexample">% ar -q libstdc++.a libstdc++.so.4 libstdc++.so.5
770 1.10 mrg </pre></div>
771 1.10 mrg
772 1.10 mrg <p>Eventually, the
773 1.10 mrg <a href="./configure.html#WithAixSoname"><samp>--with-aix-soname=svr4</samp></a>
774 1.5 mrg configure option may drop the need for this procedure for libraries that
775 1.5 mrg support it.
776 1.10 mrg </p>
777 1.10 mrg <p>Linking executables and shared libraries may produce warnings of
778 1.1 mrg duplicate symbols. The assembly files generated by GCC for AIX always
779 1.1 mrg have included multiple symbol definitions for certain global variable
780 1.1 mrg and function declarations in the original program. The warnings should
781 1.1 mrg not prevent the linker from producing a correct library or runnable
782 1.1 mrg executable.
783 1.10 mrg </p>
784 1.10 mrg <p>AIX 4.3 utilizes a “large format” archive to support both 32-bit and
785 1.1 mrg 64-bit object modules. The routines provided in AIX 4.3.0 and AIX 4.3.1
786 1.10 mrg to parse archive libraries did not handle the new format correctly.
787 1.1 mrg These routines are used by GCC and result in error messages during
788 1.1 mrg linking such as “not a COFF file”. The version of the routines shipped
789 1.10 mrg with AIX 4.3.1 should work for a 32-bit environment. The <samp>-g</samp>
790 1.1 mrg option of the archive command may be used to create archives of 32-bit
791 1.1 mrg objects using the original “small format”. A correct version of the
792 1.1 mrg routines is shipped with AIX 4.3.2 and above.
793 1.10 mrg </p>
794 1.10 mrg <p>Some versions of the AIX binder (linker) can fail with a relocation
795 1.10 mrg overflow severe error when the <samp>-bbigtoc</samp> option is used to link
796 1.1 mrg GCC-produced object files into an executable that overflows the TOC. A fix
797 1.1 mrg for APAR IX75823 (OVERFLOW DURING LINK WHEN USING GCC AND -BBIGTOC) is
798 1.1 mrg available from IBM Customer Support and from its
799 1.1 mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
800 1.1 mrg website as PTF U455193.
801 1.10 mrg </p>
802 1.10 mrg <p>The AIX 4.3.2.1 linker (bos.rte.bind_cmds Level 4.3.2.1) will dump core
803 1.1 mrg with a segmentation fault when invoked by any version of GCC. A fix for
804 1.1 mrg APAR IX87327 is available from IBM Customer Support and from its
805 1.1 mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
806 1.1 mrg website as PTF U461879. This fix is incorporated in AIX 4.3.3 and above.
807 1.10 mrg </p>
808 1.10 mrg <p>The initial assembler shipped with AIX 4.3.0 generates incorrect object
809 1.1 mrg files. A fix for APAR IX74254 (64BIT DISASSEMBLED OUTPUT FROM COMPILER FAILS
810 1.1 mrg TO ASSEMBLE/BIND) is available from IBM Customer Support and from its
811 1.1 mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
812 1.1 mrg website as PTF U453956. This fix is incorporated in AIX 4.3.1 and above.
813 1.10 mrg </p>
814 1.10 mrg <p>AIX provides National Language Support (NLS). Compilers and assemblers
815 1.1 mrg use NLS to support locale-specific representations of various data
816 1.10 mrg formats including floating-point numbers (e.g., ‘<samp>.</samp>’ vs ‘<samp>,</samp>’ for
817 1.1 mrg separating decimal fractions). There have been problems reported where
818 1.1 mrg GCC does not produce the same floating-point formats that the assembler
819 1.10 mrg expects. If one encounters this problem, set the <code>LANG</code>
820 1.10 mrg environment variable to ‘<samp>C</samp>’ or ‘<samp>En_US</samp>’.
821 1.10 mrg </p>
822 1.10 mrg <p>A default can be specified with the <samp>-mcpu=<var>cpu_type</var></samp>
823 1.10 mrg switch and using the configure option <samp>--with-cpu-<var>cpu_type</var></samp>.
824 1.10 mrg </p>
825 1.10 mrg <hr />
826 1.10 mrg <a name="iq2000-x-elf"></a><a name="iq2000-*-elf"></a>
827 1.10 mrg <h3 class="heading">iq2000-*-elf</h3>
828 1.1 mrg <p>Vitesse IQ2000 processors. These are used in embedded
829 1.1 mrg applications. There are no standard Unix configurations.
830 1.10 mrg </p>
831 1.10 mrg <hr />
832 1.10 mrg <a name="lm32-x-elf"></a><a name="lm32-*-elf"></a>
833 1.10 mrg <h3 class="heading">lm32-*-elf</h3>
834 1.10 mrg <p>Lattice Mico32 processor.
835 1.1 mrg This configuration is intended for embedded systems.
836 1.10 mrg </p>
837 1.10 mrg <hr />
838 1.10 mrg <a name="lm32-x-uclinux"></a><a name="lm32-*-uclinux"></a>
839 1.10 mrg <h3 class="heading">lm32-*-uclinux</h3>
840 1.10 mrg <p>Lattice Mico32 processor.
841 1.1 mrg This configuration is intended for embedded systems running uClinux.
842 1.10 mrg </p>
843 1.10 mrg <hr />
844 1.10 mrg <a name="m32c-x-elf"></a><a name="m32c-*-elf"></a>
845 1.10 mrg <h3 class="heading">m32c-*-elf</h3>
846 1.10 mrg <p>Renesas M32C processor.
847 1.1 mrg This configuration is intended for embedded systems.
848 1.10 mrg </p>
849 1.10 mrg <hr />
850 1.10 mrg <a name="m32r-x-elf"></a><a name="m32r-*-elf"></a>
851 1.10 mrg <h3 class="heading">m32r-*-elf</h3>
852 1.10 mrg <p>Renesas M32R processor.
853 1.1 mrg This configuration is intended for embedded systems.
854 1.10 mrg </p>
855 1.10 mrg <hr />
856 1.10 mrg <a name="m68k-x-x"></a><a name="m68k-*-*"></a>
857 1.10 mrg <h3 class="heading">m68k-*-*</h3>
858 1.1 mrg <p>By default,
859 1.10 mrg ‘<samp>m68k-*-elf*</samp>’, ‘<samp>m68k-*-rtems</samp>’, ‘<samp>m68k-*-uclinux</samp>’ and
860 1.10 mrg ‘<samp>m68k-*-linux</samp>’
861 1.1 mrg build libraries for both M680x0 and ColdFire processors. If you only
862 1.1 mrg need the M680x0 libraries, you can omit the ColdFire ones by passing
863 1.10 mrg <samp>--with-arch=m68k</samp> to <code>configure</code>. Alternatively, you
864 1.10 mrg can omit the M680x0 libraries by passing <samp>--with-arch=cf</samp> to
865 1.10 mrg <code>configure</code>. These targets default to 5206 or 5475 code as
866 1.1 mrg appropriate for the target system when
867 1.10 mrg configured with <samp>--with-arch=cf</samp> and 68020 code otherwise.
868 1.10 mrg </p>
869 1.10 mrg <p>The ‘<samp>m68k-*-netbsd</samp>’ and
870 1.10 mrg ‘<samp>m68k-*-openbsd</samp>’ targets also support the <samp>--with-arch</samp>
871 1.1 mrg option. They will generate ColdFire CFV4e code when configured with
872 1.10 mrg <samp>--with-arch=cf</samp> and 68020 code otherwise.
873 1.10 mrg </p>
874 1.10 mrg <p>You can override the default processors listed above by configuring
875 1.10 mrg with <samp>--with-cpu=<var>target</var></samp>. This <var>target</var> can either
876 1.10 mrg be a <samp>-mcpu</samp> argument or one of the following values:
877 1.10 mrg ‘<samp>m68000</samp>’, ‘<samp>m68010</samp>’, ‘<samp>m68020</samp>’, ‘<samp>m68030</samp>’,
878 1.10 mrg ‘<samp>m68040</samp>’, ‘<samp>m68060</samp>’, ‘<samp>m68020-40</samp>’ and ‘<samp>m68020-60</samp>’.
879 1.10 mrg </p>
880 1.10 mrg <p>GCC requires at least binutils version 2.17 on these targets.
881 1.10 mrg </p>
882 1.10 mrg <hr />
883 1.10 mrg <a name="m68k-x-uclinux"></a><a name="m68k-*-uclinux"></a>
884 1.10 mrg <h3 class="heading">m68k-*-uclinux</h3>
885 1.1 mrg <p>GCC 4.3 changed the uClinux configuration so that it uses the
886 1.10 mrg ‘<samp>m68k-linux-gnu</samp>’ ABI rather than the ‘<samp>m68k-elf</samp>’ ABI.
887 1.1 mrg It also added improved support for C++ and flat shared libraries,
888 1.3 skrll both of which were ABI changes.
889 1.10 mrg </p>
890 1.10 mrg <hr />
891 1.10 mrg <a name="microblaze-x-elf"></a><a name="microblaze-*-elf"></a>
892 1.10 mrg <h3 class="heading">microblaze-*-elf</h3>
893 1.10 mrg <p>Xilinx MicroBlaze processor.
894 1.1 mrg This configuration is intended for embedded systems.
895 1.10 mrg </p>
896 1.10 mrg <hr />
897 1.10 mrg <a name="mips-x-x"></a><a name="mips-*-*"></a>
898 1.10 mrg <h3 class="heading">mips-*-*</h3>
899 1.1 mrg <p>If on a MIPS system you get an error message saying “does not have gp
900 1.10 mrg sections for all it’s [sic] sectons [sic]”, don’t worry about it. This
901 1.1 mrg happens whenever you use GAS with the MIPS linker, but there is not
902 1.1 mrg really anything wrong, and it is okay to use the output file. You can
903 1.1 mrg stop such warnings by installing the GNU linker.
904 1.10 mrg </p>
905 1.10 mrg <p>It would be nice to extend GAS to produce the gp tables, but they are
906 1.1 mrg optional, and there should not be a warning about their absence.
907 1.10 mrg </p>
908 1.10 mrg <p>The libstdc++ atomic locking routines for MIPS targets requires MIPS II
909 1.1 mrg and later. A patch went in just after the GCC 3.3 release to
910 1.10 mrg make ‘<samp>mips*-*-*</samp>’ use the generic implementation instead. You can also
911 1.10 mrg configure for ‘<samp>mipsel-elf</samp>’ as a workaround. The
912 1.10 mrg ‘<samp>mips*-*-linux*</samp>’ target continues to use the MIPS II routines. More
913 1.1 mrg work on this is expected in future releases.
914 1.10 mrg </p>
915 1.1 mrg
916 1.10 mrg <p>The built-in <code>__sync_*</code> functions are available on MIPS II and
917 1.10 mrg later systems and others that support the ‘<samp>ll</samp>’, ‘<samp>sc</samp>’ and
918 1.10 mrg ‘<samp>sync</samp>’ instructions. This can be overridden by passing
919 1.10 mrg <samp>--with-llsc</samp> or <samp>--without-llsc</samp> when configuring GCC.
920 1.1 mrg Since the Linux kernel emulates these instructions if they are
921 1.10 mrg missing, the default for ‘<samp>mips*-*-linux*</samp>’ targets is
922 1.10 mrg <samp>--with-llsc</samp>. The <samp>--with-llsc</samp> and
923 1.10 mrg <samp>--without-llsc</samp> configure options may be overridden at compile
924 1.10 mrg time by passing the <samp>-mllsc</samp> or <samp>-mno-llsc</samp> options to
925 1.1 mrg the compiler.
926 1.10 mrg </p>
927 1.10 mrg <p>MIPS systems check for division by zero (unless
928 1.10 mrg <samp>-mno-check-zero-division</samp> is passed to the compiler) by
929 1.1 mrg generating either a conditional trap or a break instruction. Using
930 1.1 mrg trap results in smaller code, but is only supported on MIPS II and
931 1.1 mrg later. Also, some versions of the Linux kernel have a bug that
932 1.1 mrg prevents trap from generating the proper signal (<code>SIGFPE</code>). To enable
933 1.10 mrg the use of break, use the <samp>--with-divide=breaks</samp>
934 1.10 mrg <code>configure</code> option when configuring GCC. The default is to
935 1.1 mrg use traps on systems that support them.
936 1.10 mrg </p>
937 1.10 mrg <hr />
938 1.10 mrg <a name="moxie-x-elf"></a><a name="moxie-*-elf"></a>
939 1.10 mrg <h3 class="heading">moxie-*-elf</h3>
940 1.3 skrll <p>The moxie processor.
941 1.10 mrg </p>
942 1.10 mrg <hr />
943 1.12 mrg <a name="msp430-x-elf"></a><a name="msp430-*-elf*"></a>
944 1.12 mrg <h3 class="heading">msp430-*-elf*</h3>
945 1.10 mrg <p>TI MSP430 processor.
946 1.5 mrg This configuration is intended for embedded systems.
947 1.10 mrg </p>
948 1.12 mrg <p>‘<samp>msp430-*-elf</samp>’ is the standard configuration with most GCC
949 1.12 mrg features enabled by default.
950 1.12 mrg </p>
951 1.12 mrg <p>‘<samp>msp430-*-elfbare</samp>’ is tuned for a bare-metal environment, and disables
952 1.12 mrg features related to shared libraries and other functionality not used for
953 1.12 mrg this device. This reduces code and data usage of the GCC libraries, resulting
954 1.12 mrg in a minimal run-time environment by default.
955 1.12 mrg </p>
956 1.12 mrg <p>Features disabled by default include:
957 1.12 mrg </p><ul>
958 1.12 mrg <li> transactional memory
959 1.12 mrg </li><li> __cxa_atexit
960 1.12 mrg </li></ul>
961 1.12 mrg
962 1.10 mrg <hr />
963 1.10 mrg <a name="nds32le-x-elf"></a><a name="nds32le-*-elf"></a>
964 1.10 mrg <h3 class="heading">nds32le-*-elf</h3>
965 1.5 mrg <p>Andes NDS32 target in little endian mode.
966 1.10 mrg </p>
967 1.10 mrg <hr />
968 1.10 mrg <a name="nds32be-x-elf"></a><a name="nds32be-*-elf"></a>
969 1.10 mrg <h3 class="heading">nds32be-*-elf</h3>
970 1.5 mrg <p>Andes NDS32 target in big endian mode.
971 1.10 mrg </p>
972 1.10 mrg <hr />
973 1.10 mrg <a name="nvptx-x-none"></a><a name="nvptx-*-none"></a>
974 1.10 mrg <h3 class="heading">nvptx-*-none</h3>
975 1.5 mrg <p>Nvidia PTX target.
976 1.10 mrg </p>
977 1.10 mrg <p>Instead of GNU binutils, you will need to install
978 1.10 mrg <a href="https://github.com/MentorEmbedded/nvptx-tools/">nvptx-tools</a>.
979 1.5 mrg Tell GCC where to find it:
980 1.10 mrg <samp>--with-build-time-tools=[install-nvptx-tools]/nvptx-none/bin</samp>.
981 1.10 mrg </p>
982 1.10 mrg <p>You will need newlib 3.0 git revision
983 1.10 mrg cd31fbb2aea25f94d7ecedc9db16dfc87ab0c316 or later. It can be
984 1.10 mrg automatically built together with GCC. For this, add a symbolic link
985 1.10 mrg to nvptx-newlib’s <samp>newlib</samp> directory to the directory containing
986 1.10 mrg the GCC sources.
987 1.10 mrg </p>
988 1.10 mrg <p>Use the <samp>--disable-sjlj-exceptions</samp> and
989 1.10 mrg <samp>--enable-newlib-io-long-long</samp> options when configuring.
990 1.10 mrg </p>
991 1.10 mrg <hr />
992 1.11 mrg <a name="or1k-x-elf"></a><a name="or1k-*-elf"></a>
993 1.11 mrg <h3 class="heading">or1k-*-elf</h3>
994 1.11 mrg <p>The OpenRISC 1000 32-bit processor with delay slots.
995 1.11 mrg This configuration is intended for embedded systems.
996 1.11 mrg </p>
997 1.11 mrg <hr />
998 1.11 mrg <a name="or1k-x-linux"></a><a name="or1k-*-linux"></a>
999 1.11 mrg <h3 class="heading">or1k-*-linux</h3>
1000 1.11 mrg <p>The OpenRISC 1000 32-bit processor with delay slots.
1001 1.11 mrg </p>
1002 1.11 mrg <hr />
1003 1.10 mrg <a name="powerpc-x-x"></a><a name="powerpc-*-*"></a>
1004 1.10 mrg <h3 class="heading">powerpc-*-*</h3>
1005 1.10 mrg <p>You can specify a default version for the <samp>-mcpu=<var>cpu_type</var></samp>
1006 1.10 mrg switch by using the configure option <samp>--with-cpu-<var>cpu_type</var></samp>.
1007 1.10 mrg </p>
1008 1.12 mrg <p>You will need GNU binutils 2.20 or newer.
1009 1.10 mrg </p>
1010 1.10 mrg <hr />
1011 1.10 mrg <a name="powerpc-x-darwin"></a><a name="powerpc-*-darwin*"></a>
1012 1.10 mrg <h3 class="heading">powerpc-*-darwin*</h3>
1013 1.1 mrg <p>PowerPC running Darwin (Mac OS X kernel).
1014 1.10 mrg </p>
1015 1.10 mrg <p>Pre-installed versions of Mac OS X may not include any developer tools,
1016 1.1 mrg meaning that you will not be able to build GCC from source. Tool
1017 1.1 mrg binaries are available at
1018 1.9 mrg <a href="https://opensource.apple.com">https://opensource.apple.com</a>.
1019 1.10 mrg </p>
1020 1.10 mrg <p>This version of GCC requires at least cctools-590.36. The
1021 1.1 mrg cctools-590.36 package referenced from
1022 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
1023 1.1 mrg on systems older than 10.3.9 (aka darwin7.9.0).
1024 1.10 mrg </p>
1025 1.10 mrg <hr />
1026 1.10 mrg <a name="powerpc-x-elf"></a><a name="powerpc-*-elf"></a>
1027 1.10 mrg <h3 class="heading">powerpc-*-elf</h3>
1028 1.1 mrg <p>PowerPC system in big endian mode, running System V.4.
1029 1.10 mrg </p>
1030 1.10 mrg <hr />
1031 1.10 mrg <a name="powerpc-x-linux-gnu"></a><a name="powerpc*-*-linux-gnu*"></a>
1032 1.10 mrg <h3 class="heading">powerpc*-*-linux-gnu*</h3>
1033 1.1 mrg <p>PowerPC system in big endian mode running Linux.
1034 1.10 mrg </p>
1035 1.10 mrg <hr />
1036 1.10 mrg <a name="powerpc-x-netbsd"></a><a name="powerpc-*-netbsd*"></a>
1037 1.10 mrg <h3 class="heading">powerpc-*-netbsd*</h3>
1038 1.1 mrg <p>PowerPC system in big endian mode running NetBSD.
1039 1.10 mrg </p>
1040 1.10 mrg <hr />
1041 1.10 mrg <a name="powerpc-x-eabisim"></a><a name="powerpc-*-eabisim"></a>
1042 1.10 mrg <h3 class="heading">powerpc-*-eabisim</h3>
1043 1.1 mrg <p>Embedded PowerPC system in big endian mode for use in running under the
1044 1.1 mrg PSIM simulator.
1045 1.10 mrg </p>
1046 1.10 mrg <hr />
1047 1.10 mrg <a name="powerpc-x-eabi"></a><a name="powerpc-*-eabi"></a>
1048 1.10 mrg <h3 class="heading">powerpc-*-eabi</h3>
1049 1.1 mrg <p>Embedded PowerPC system in big endian mode.
1050 1.10 mrg </p>
1051 1.10 mrg <hr />
1052 1.10 mrg <a name="powerpcle-x-elf"></a><a name="powerpcle-*-elf"></a>
1053 1.10 mrg <h3 class="heading">powerpcle-*-elf</h3>
1054 1.1 mrg <p>PowerPC system in little endian mode, running System V.4.
1055 1.10 mrg </p>
1056 1.10 mrg <hr />
1057 1.10 mrg <a name="powerpcle-x-eabisim"></a><a name="powerpcle-*-eabisim"></a>
1058 1.10 mrg <h3 class="heading">powerpcle-*-eabisim</h3>
1059 1.1 mrg <p>Embedded PowerPC system in little endian mode for use in running under
1060 1.1 mrg the PSIM simulator.
1061 1.10 mrg </p>
1062 1.10 mrg <hr />
1063 1.10 mrg <a name="powerpcle-x-eabi"></a><a name="powerpcle-*-eabi"></a>
1064 1.10 mrg <h3 class="heading">powerpcle-*-eabi</h3>
1065 1.1 mrg <p>Embedded PowerPC system in little endian mode.
1066 1.10 mrg </p>
1067 1.10 mrg <hr />
1068 1.10 mrg <a name="rl78-x-elf"></a><a name="rl78-*-elf"></a>
1069 1.10 mrg <h3 class="heading">rl78-*-elf</h3>
1070 1.10 mrg <p>The Renesas RL78 processor.
1071 1.10 mrg This configuration is intended for embedded systems.
1072 1.10 mrg </p>
1073 1.10 mrg <hr />
1074 1.10 mrg <a name="riscv32-x-elf"></a><a name="riscv32-*-elf"></a>
1075 1.10 mrg <h3 class="heading">riscv32-*-elf</h3>
1076 1.10 mrg <p>The RISC-V RV32 instruction set.
1077 1.3 skrll This configuration is intended for embedded systems.
1078 1.12 mrg This (and all other RISC-V) targets require the binutils 2.30 release.
1079 1.10 mrg </p>
1080 1.10 mrg <hr />
1081 1.10 mrg <a name="riscv32-x-linux"></a><a name="riscv32-*-linux"></a>
1082 1.10 mrg <h3 class="heading">riscv32-*-linux</h3>
1083 1.10 mrg <p>The RISC-V RV32 instruction set running GNU/Linux.
1084 1.12 mrg This (and all other RISC-V) targets require the binutils 2.30 release.
1085 1.10 mrg </p>
1086 1.10 mrg <hr />
1087 1.10 mrg <a name="riscv64-x-elf"></a><a name="riscv64-*-elf"></a>
1088 1.10 mrg <h3 class="heading">riscv64-*-elf</h3>
1089 1.10 mrg <p>The RISC-V RV64 instruction set.
1090 1.10 mrg This configuration is intended for embedded systems.
1091 1.12 mrg This (and all other RISC-V) targets require the binutils 2.30 release.
1092 1.10 mrg </p>
1093 1.10 mrg <hr />
1094 1.10 mrg <a name="riscv64-x-linux"></a><a name="riscv64-*-linux"></a>
1095 1.10 mrg <h3 class="heading">riscv64-*-linux</h3>
1096 1.10 mrg <p>The RISC-V RV64 instruction set running GNU/Linux.
1097 1.12 mrg This (and all other RISC-V) targets require the binutils 2.30 release.
1098 1.10 mrg </p>
1099 1.10 mrg <hr />
1100 1.10 mrg <a name="rx-x-elf"></a><a name="rx-*-elf"></a>
1101 1.10 mrg <h3 class="heading">rx-*-elf</h3>
1102 1.9 mrg <p>The Renesas RX processor.
1103 1.10 mrg </p>
1104 1.10 mrg <hr />
1105 1.10 mrg <a name="s390-x-linux"></a><a name="s390-*-linux*"></a>
1106 1.10 mrg <h3 class="heading">s390-*-linux*</h3>
1107 1.1 mrg <p>S/390 system running GNU/Linux for S/390.
1108 1.10 mrg </p>
1109 1.10 mrg <hr />
1110 1.10 mrg <a name="s390x-x-linux"></a><a name="s390x-*-linux*"></a>
1111 1.10 mrg <h3 class="heading">s390x-*-linux*</h3>
1112 1.1 mrg <p>zSeries system (64-bit) running GNU/Linux for zSeries.
1113 1.10 mrg </p>
1114 1.10 mrg <hr />
1115 1.10 mrg <a name="s390x-ibm-tpf"></a><a name="s390x-ibm-tpf*"></a>
1116 1.10 mrg <h3 class="heading">s390x-ibm-tpf*</h3>
1117 1.1 mrg <p>zSeries system (64-bit) running TPF. This platform is
1118 1.1 mrg supported as cross-compilation target only.
1119 1.10 mrg </p>
1120 1.10 mrg <hr />
1121 1.10 mrg <a name="x-x-solaris2"></a><a name="g_t*-*-solaris2*"></a>
1122 1.10 mrg <h3 class="heading">*-*-solaris2*</h3>
1123 1.12 mrg <p>Support for Solaris 10 has been removed in GCC 10. Support for Solaris
1124 1.12 mrg 9 has been removed in GCC 5. Support for Solaris 8 has been removed in
1125 1.12 mrg GCC 4.8. Support for Solaris 7 has been removed in GCC 4.6.
1126 1.12 mrg </p>
1127 1.12 mrg <p>Solaris 11.3 provides GCC 4.5.2, 4.7.3, and 4.8.2 as
1128 1.12 mrg <code>/usr/gcc/4.5/bin/gcc</code> or similar. Newer Solaris versions
1129 1.12 mrg provide one or more of GCC 5, 7, and 9. Alternatively,
1130 1.1 mrg you can install a pre-built GCC to bootstrap and install GCC. See the
1131 1.1 mrg <a href="binaries.html">binaries page</a> for details.
1132 1.10 mrg </p>
1133 1.10 mrg <p>The Solaris 2 <code>/bin/sh</code> will often fail to configure
1134 1.12 mrg ‘<samp>libstdc++-v3</samp>’. We therefore recommend using the
1135 1.9 mrg following initial sequence of commands
1136 1.10 mrg </p>
1137 1.10 mrg <div class="smallexample">
1138 1.10 mrg <pre class="smallexample">% CONFIG_SHELL=/bin/ksh
1139 1.10 mrg % export CONFIG_SHELL
1140 1.10 mrg </pre></div>
1141 1.9 mrg
1142 1.10 mrg <p>and proceed as described in <a href="configure.html">the configure instructions</a>.
1143 1.1 mrg In addition we strongly recommend specifying an absolute path to invoke
1144 1.10 mrg <code><var>srcdir</var>/configure</code>.
1145 1.10 mrg </p>
1146 1.12 mrg <p>In Solaris 11, you need to check for <code>system/header</code>,
1147 1.12 mrg <code>system/linker</code>, and <code>developer/assembler</code> packages.
1148 1.10 mrg </p>
1149 1.10 mrg <p>Trying to use the linker and other tools in
1150 1.10 mrg <samp>/usr/ucb</samp> to install GCC has been observed to cause trouble.
1151 1.1 mrg For example, the linker may hang indefinitely. The fix is to remove
1152 1.10 mrg <samp>/usr/ucb</samp> from your <code>PATH</code>.
1153 1.10 mrg </p>
1154 1.12 mrg <p>The build process works more smoothly with the legacy Solaris tools so, if you
1155 1.10 mrg have <samp>/usr/xpg4/bin</samp> in your <code>PATH</code>, we recommend that you place
1156 1.10 mrg <samp>/usr/bin</samp> before <samp>/usr/xpg4/bin</samp> for the duration of the build.
1157 1.10 mrg </p>
1158 1.10 mrg <p>We recommend the use of the Solaris assembler or the GNU assembler, in
1159 1.10 mrg conjunction with the Solaris linker. The GNU <code>as</code>
1160 1.12 mrg versions included in Solaris 11.3,
1161 1.12 mrg from GNU binutils 2.23.1 or newer (in <samp>/usr/bin/gas</samp> and
1162 1.10 mrg <samp>/usr/gnu/bin/as</samp>), are known to work.
1163 1.12 mrg The current version, from GNU binutils 2.34,
1164 1.10 mrg is known to work as well. Note that your mileage may vary
1165 1.7 mrg if you use a combination of the GNU tools and the Solaris tools: while the
1166 1.12 mrg combination GNU <code>as</code> + Solaris <code>ld</code> should reasonably work,
1167 1.12 mrg the reverse combination Solaris <code>as</code> + GNU <code>ld</code> may fail to
1168 1.10 mrg build or cause memory corruption at runtime in some cases for C++ programs.
1169 1.12 mrg GNU <code>ld</code> usually works as well. Again, the current
1170 1.12 mrg version (2.34) is known to work, but generally lacks platform specific
1171 1.10 mrg features, so better stay with Solaris <code>ld</code>. To use the LTO linker
1172 1.10 mrg plugin (<samp>-fuse-linker-plugin</samp>) with GNU <code>ld</code>, GNU
1173 1.10 mrg binutils <em>must</em> be configured with <samp>--enable-largefile</samp>.
1174 1.10 mrg </p>
1175 1.10 mrg <p>To enable symbol versioning in ‘<samp>libstdc++</samp>’ with the Solaris linker,
1176 1.10 mrg you need to have any version of GNU <code>c++filt</code>, which is part of
1177 1.10 mrg GNU binutils. ‘<samp>libstdc++</samp>’ symbol versioning will be disabled if no
1178 1.10 mrg appropriate version is found. Solaris <code>c++filt</code> from the Solaris
1179 1.7 mrg Studio compilers does <em>not</em> work.
1180 1.10 mrg </p>
1181 1.12 mrg <p>The versions of the GNU Multiple Precision Library (GMP), the MPFR
1182 1.12 mrg library and the MPC library bundled with Solaris 11.3 and later are
1183 1.12 mrg usually recent enough to match GCC’s requirements. There are two
1184 1.12 mrg caveats:
1185 1.10 mrg </p>
1186 1.12 mrg <ul>
1187 1.12 mrg <li> While the version of the GMP library in Solaris 11.3 works with GCC, you
1188 1.12 mrg need to configure with <samp>--with-gmp-include=/usr/include/gmp</samp>.
1189 1.12 mrg
1190 1.12 mrg </li><li> The version of the MPFR libary included in Solaris 11.3 is too old; you
1191 1.12 mrg need to provide a more recent one.
1192 1.12 mrg </li></ul>
1193 1.12 mrg
1194 1.10 mrg <hr />
1195 1.10 mrg <a name="sparc-x-x"></a><a name="sparc*-*-*"></a>
1196 1.10 mrg <h3 class="heading">sparc*-*-*</h3>
1197 1.3 skrll <p>This section contains general configuration information for all
1198 1.3 skrll SPARC-based platforms. In addition to reading this section, please
1199 1.3 skrll read all other sections that match your target.
1200 1.10 mrg </p>
1201 1.10 mrg <p>Newer versions of the GNU Multiple Precision Library (GMP), the MPFR
1202 1.3 skrll library and the MPC library are known to be miscompiled by earlier
1203 1.3 skrll versions of GCC on these platforms. We therefore recommend the use
1204 1.3 skrll of the exact versions of these libraries listed as minimal versions
1205 1.3 skrll in <a href="prerequisites.html">the prerequisites</a>.
1206 1.10 mrg </p>
1207 1.10 mrg <hr />
1208 1.10 mrg <a name="sparc-sun-solaris2"></a><a name="sparc-sun-solaris2*"></a>
1209 1.10 mrg <h3 class="heading">sparc-sun-solaris2*</h3>
1210 1.1 mrg <p>When GCC is configured to use GNU binutils 2.14 or later, the binaries
1211 1.12 mrg produced are smaller than the ones produced using Solaris native tools;
1212 1.1 mrg this difference is quite significant for binaries containing debugging
1213 1.1 mrg information.
1214 1.10 mrg </p>
1215 1.10 mrg <p>Starting with Solaris 7, the operating system is capable of executing
1216 1.1 mrg 64-bit SPARC V9 binaries. GCC 3.1 and later properly supports
1217 1.10 mrg this; the <samp>-m64</samp> option enables 64-bit code generation.
1218 1.1 mrg However, if all you want is code tuned for the UltraSPARC CPU, you
1219 1.10 mrg should try the <samp>-mtune=ultrasparc</samp> option instead, which produces
1220 1.1 mrg code that, unlike full 64-bit code, can still run on non-UltraSPARC
1221 1.1 mrg machines.
1222 1.10 mrg </p>
1223 1.10 mrg <p>When configuring the GNU Multiple Precision Library (GMP), the MPFR
1224 1.3 skrll library or the MPC library on a Solaris 7 or later system, the canonical
1225 1.10 mrg target triplet must be specified as the <code>build</code> parameter on the
1226 1.10 mrg configure line. This target triplet can be obtained by invoking <code>./config.guess</code> in the toplevel source directory of GCC (and
1227 1.12 mrg not that of GMP or MPFR or MPC). For example on a Solaris 11 system:
1228 1.10 mrg </p>
1229 1.10 mrg <div class="smallexample">
1230 1.12 mrg <pre class="smallexample">% ./configure --build=sparc-sun-solaris2.11 --prefix=xxx
1231 1.10 mrg </pre></div>
1232 1.10 mrg
1233 1.10 mrg <hr />
1234 1.10 mrg <a name="sparc-x-linux"></a><a name="sparc-*-linux*"></a>
1235 1.10 mrg <h3 class="heading">sparc-*-linux*</h3>
1236 1.10 mrg
1237 1.10 mrg <hr />
1238 1.10 mrg <a name="sparc64-x-solaris2"></a><a name="sparc64-*-solaris2*"></a>
1239 1.10 mrg <h3 class="heading">sparc64-*-solaris2*</h3>
1240 1.12 mrg <p>When configuring a 64-bit-default GCC on Solaris/SPARC, you must use a
1241 1.12 mrg build compiler that generates 64-bit code, either by default or by
1242 1.12 mrg specifying ‘<samp>CC='gcc -m64' CXX='gcc-m64'</samp>’ to <code>configure</code>.
1243 1.12 mrg Additionally, you <em>must</em> pass <samp>--build=sparc64-sun-solaris2.11</samp>
1244 1.12 mrg or <samp>--build=sparcv9-sun-solaris2.11</samp> because <samp>config.guess</samp>
1245 1.12 mrg misdetects this situation, which can cause build failures.
1246 1.12 mrg </p>
1247 1.3 skrll <p>When configuring the GNU Multiple Precision Library (GMP), the MPFR
1248 1.3 skrll library or the MPC library, the canonical target triplet must be specified
1249 1.10 mrg as the <code>build</code> parameter on the configure line. For example
1250 1.12 mrg on a Solaris 11 system:
1251 1.10 mrg </p>
1252 1.10 mrg <div class="smallexample">
1253 1.12 mrg <pre class="smallexample">% ./configure --build=sparc64-sun-solaris2.11 --prefix=xxx
1254 1.10 mrg </pre></div>
1255 1.10 mrg
1256 1.10 mrg <hr />
1257 1.10 mrg <a name="sparcv9-x-solaris2"></a><a name="sparcv9-*-solaris2*"></a>
1258 1.10 mrg <h3 class="heading">sparcv9-*-solaris2*</h3>
1259 1.10 mrg <p>This is a synonym for ‘<samp>sparc64-*-solaris2*</samp>’.
1260 1.10 mrg </p>
1261 1.10 mrg <hr />
1262 1.10 mrg <a name="c6x-x-x"></a><a name="c6x-*-*"></a>
1263 1.10 mrg <h3 class="heading">c6x-*-*</h3>
1264 1.3 skrll <p>The C6X family of processors. This port requires binutils-2.22 or newer.
1265 1.10 mrg </p>
1266 1.10 mrg <hr />
1267 1.10 mrg <a name="tilegx-*-linux"></a><a name="tilegx-*-linux*"></a>
1268 1.10 mrg <h3 class="heading">tilegx-*-linux*</h3>
1269 1.5 mrg <p>The TILE-Gx processor in little endian mode, running GNU/Linux. This
1270 1.5 mrg port requires binutils-2.22 or newer.
1271 1.10 mrg </p>
1272 1.10 mrg <hr />
1273 1.10 mrg <a name="tilegxbe-*-linux"></a><a name="tilegxbe-*-linux*"></a>
1274 1.10 mrg <h3 class="heading">tilegxbe-*-linux*</h3>
1275 1.5 mrg <p>The TILE-Gx processor in big endian mode, running GNU/Linux. This
1276 1.5 mrg port requires binutils-2.23 or newer.
1277 1.10 mrg </p>
1278 1.10 mrg <hr />
1279 1.10 mrg <a name="tilepro-*-linux"></a><a name="tilepro-*-linux*"></a>
1280 1.10 mrg <h3 class="heading">tilepro-*-linux*</h3>
1281 1.3 skrll <p>The TILEPro processor running GNU/Linux. This port requires
1282 1.3 skrll binutils-2.22 or newer.
1283 1.10 mrg </p>
1284 1.10 mrg <hr />
1285 1.10 mrg <a name="visium-x-elf"></a><a name="visium-*-elf"></a>
1286 1.10 mrg <h3 class="heading">visium-*-elf</h3>
1287 1.10 mrg <p>CDS VISIUMcore processor.
1288 1.5 mrg This configuration is intended for embedded systems.
1289 1.10 mrg </p>
1290 1.10 mrg <hr />
1291 1.10 mrg <a name="x-x-vxworks"></a><a name="g_t*-*-vxworks*"></a>
1292 1.10 mrg <h3 class="heading">*-*-vxworks*</h3>
1293 1.1 mrg <p>Support for VxWorks is in flux. At present GCC supports <em>only</em> the
1294 1.10 mrg very recent VxWorks 5.5 (aka Tornado 2.2) release, and only on PowerPC.
1295 1.10 mrg We welcome patches for other architectures supported by VxWorks 5.5.
1296 1.1 mrg Support for VxWorks AE would also be welcome; we believe this is merely
1297 1.1 mrg a matter of writing an appropriate “configlette” (see below). We are
1298 1.1 mrg not interested in supporting older, a.out or COFF-based, versions of
1299 1.1 mrg VxWorks in GCC 3.
1300 1.10 mrg </p>
1301 1.10 mrg <p>VxWorks comes with an older version of GCC installed in
1302 1.10 mrg <samp><var>$WIND_BASE</var>/host</samp>; we recommend you do not overwrite it.
1303 1.10 mrg Choose an installation <var>prefix</var> entirely outside <var>$WIND_BASE</var>.
1304 1.10 mrg Before running <code>configure</code>, create the directories <samp><var>prefix</var></samp>
1305 1.10 mrg and <samp><var>prefix</var>/bin</samp>. Link or copy the appropriate assembler,
1306 1.10 mrg linker, etc. into <samp><var>prefix</var>/bin</samp>, and set your <var>PATH</var> to
1307 1.10 mrg include that directory while running both <code>configure</code> and
1308 1.10 mrg <code>make</code>.
1309 1.10 mrg </p>
1310 1.10 mrg <p>You must give <code>configure</code> the
1311 1.10 mrg <samp>--with-headers=<var>$WIND_BASE</var>/target/h</samp> switch so that it can
1312 1.1 mrg find the VxWorks system headers. Since VxWorks is a cross compilation
1313 1.10 mrg target only, you must also specify <samp>--target=<var>target</var></samp>.
1314 1.10 mrg <code>configure</code> will attempt to create the directory
1315 1.10 mrg <samp><var>prefix</var>/<var>target</var>/sys-include</samp> and copy files into it;
1316 1.10 mrg make sure the user running <code>configure</code> has sufficient privilege
1317 1.1 mrg to do so.
1318 1.10 mrg </p>
1319 1.10 mrg <p>GCC’s exception handling runtime requires a special “configlette”
1320 1.10 mrg module, <samp>contrib/gthr_supp_vxw_5x.c</samp>. Follow the instructions in
1321 1.1 mrg that file to add the module to your kernel build. (Future versions of
1322 1.1 mrg VxWorks will incorporate this module.)
1323 1.10 mrg </p>
1324 1.10 mrg <hr />
1325 1.10 mrg <a name="x86-64-x-x"></a><a name="x86_005f64-*-*_002c-amd64-*-*"></a>
1326 1.10 mrg <h3 class="heading">x86_64-*-*, amd64-*-*</h3>
1327 1.1 mrg <p>GCC supports the x86-64 architecture implemented by the AMD64 processor
1328 1.10 mrg (amd64-*-* is an alias for x86_64-*-*) on GNU/Linux, FreeBSD and NetBSD.
1329 1.1 mrg On GNU/Linux the default is a bi-arch compiler which is able to generate
1330 1.10 mrg both 64-bit x86-64 and 32-bit x86 code (via the <samp>-m32</samp> switch).
1331 1.10 mrg </p>
1332 1.10 mrg <hr />
1333 1.12 mrg <a name="x86-64-x-solaris2"></a><a name="x86_005f64-*-solaris2*"></a>
1334 1.12 mrg <h3 class="heading">x86_64-*-solaris2*</h3>
1335 1.3 skrll <p>GCC also supports the x86-64 architecture implemented by the AMD64
1336 1.10 mrg processor (‘<samp>amd64-*-*</samp>’ is an alias for ‘<samp>x86_64-*-*</samp>’) on
1337 1.3 skrll Solaris 10 or later. Unlike other systems, without special options a
1338 1.3 skrll bi-arch compiler is built which generates 32-bit code by default, but
1339 1.10 mrg can generate 64-bit x86-64 code with the <samp>-m64</samp> switch. Since
1340 1.7 mrg GCC 4.7, there is also a configuration that defaults to 64-bit code, but
1341 1.10 mrg can generate 32-bit code with <samp>-m32</samp>. To configure and build
1342 1.10 mrg this way, you have to provide all support libraries like <samp>libgmp</samp>
1343 1.12 mrg as 64-bit code, configure with <samp>--target=x86_64-pc-solaris2.11</samp>
1344 1.10 mrg and ‘<samp>CC=gcc -m64</samp>’.
1345 1.10 mrg </p>
1346 1.10 mrg <hr />
1347 1.10 mrg <a name="xtensa-x-elf"></a><a name="xtensa*-*-elf"></a>
1348 1.10 mrg <h3 class="heading">xtensa*-*-elf</h3>
1349 1.1 mrg <p>This target is intended for embedded Xtensa systems using the
1350 1.10 mrg ‘<samp>newlib</samp>’ C library. It uses ELF but does not support shared
1351 1.1 mrg objects. Designed-defined instructions specified via the
1352 1.1 mrg Tensilica Instruction Extension (TIE) language are only supported
1353 1.1 mrg through inline assembly.
1354 1.10 mrg </p>
1355 1.10 mrg <p>The Xtensa configuration information must be specified prior to
1356 1.10 mrg building GCC. The <samp>include/xtensa-config.h</samp> header
1357 1.1 mrg file contains the configuration information. If you created your
1358 1.1 mrg own Xtensa configuration with the Xtensa Processor Generator, the
1359 1.1 mrg downloaded files include a customized copy of this header file,
1360 1.1 mrg which you can use to replace the default header file.
1361 1.10 mrg </p>
1362 1.10 mrg <hr />
1363 1.10 mrg <a name="xtensa-x-linux"></a><a name="xtensa*-*-linux*"></a>
1364 1.10 mrg <h3 class="heading">xtensa*-*-linux*</h3>
1365 1.1 mrg <p>This target is for Xtensa systems running GNU/Linux. It supports ELF
1366 1.1 mrg shared objects and the GNU C library (glibc). It also generates
1367 1.1 mrg position-independent code (PIC) regardless of whether the
1368 1.10 mrg <samp>-fpic</samp> or <samp>-fPIC</samp> options are used. In other
1369 1.1 mrg respects, this target is the same as the
1370 1.10 mrg <a href="#xtensa*-*-elf">‘<samp>xtensa*-*-elf</samp>’</a> target.
1371 1.10 mrg </p>
1372 1.10 mrg <hr />
1373 1.10 mrg <a name="windows"></a><a name="Microsoft-Windows"></a>
1374 1.10 mrg <h3 class="heading">Microsoft Windows</h3>
1375 1.1 mrg
1376 1.10 mrg <a name="Intel-16-bit-versions"></a>
1377 1.10 mrg <h4 class="subheading">Intel 16-bit versions</h4>
1378 1.1 mrg <p>The 16-bit versions of Microsoft Windows, such as Windows 3.1, are not
1379 1.1 mrg supported.
1380 1.10 mrg </p>
1381 1.10 mrg <p>However, the 32-bit port has limited support for Microsoft
1382 1.1 mrg Windows 3.11 in the Win32s environment, as a target only. See below.
1383 1.10 mrg </p>
1384 1.10 mrg <a name="Intel-32-bit-versions"></a>
1385 1.10 mrg <h4 class="subheading">Intel 32-bit versions</h4>
1386 1.1 mrg <p>The 32-bit versions of Windows, including Windows 95, Windows NT, Windows
1387 1.1 mrg XP, and Windows Vista, are supported by several different target
1388 1.1 mrg platforms. These targets differ in which Windows subsystem they target
1389 1.1 mrg and which C libraries are used.
1390 1.10 mrg </p>
1391 1.10 mrg <ul>
1392 1.10 mrg <li> Cygwin <a href="#x-x-cygwin">*-*-cygwin</a>: Cygwin provides a user-space
1393 1.10 mrg Linux API emulation layer in the Win32 subsystem.
1394 1.10 mrg </li><li> MinGW <a href="#x-x-mingw32">*-*-mingw32</a>: MinGW is a native GCC port for
1395 1.10 mrg the Win32 subsystem that provides a subset of POSIX.
1396 1.10 mrg </li><li> MKS i386-pc-mks: NuTCracker from MKS. See
1397 1.10 mrg <a href="https://www.mkssoftware.com">https://www.mkssoftware.com</a> for more information.
1398 1.10 mrg </li></ul>
1399 1.1 mrg
1400 1.10 mrg <a name="Intel-64-bit-versions"></a>
1401 1.10 mrg <h4 class="subheading">Intel 64-bit versions</h4>
1402 1.1 mrg <p>GCC contains support for x86-64 using the mingw-w64
1403 1.10 mrg runtime library, available from <a href="http://mingw-w64.org/doku.php">http://mingw-w64.org/doku.php</a>.
1404 1.1 mrg This library should be used with the target triple x86_64-pc-mingw32.
1405 1.10 mrg </p>
1406 1.10 mrg <p>Presently Windows for Itanium is not supported.
1407 1.10 mrg </p>
1408 1.10 mrg <a name="Windows-CE"></a>
1409 1.10 mrg <h4 class="subheading">Windows CE</h4>
1410 1.3 skrll <p>Windows CE is supported as a target only on Hitachi
1411 1.1 mrg SuperH (sh-wince-pe), and MIPS (mips-wince-pe).
1412 1.10 mrg </p>
1413 1.10 mrg <a name="Other-Windows-Platforms"></a>
1414 1.10 mrg <h4 class="subheading">Other Windows Platforms</h4>
1415 1.1 mrg <p>GCC no longer supports Windows NT on the Alpha or PowerPC.
1416 1.10 mrg </p>
1417 1.10 mrg <p>GCC no longer supports the Windows POSIX subsystem. However, it does
1418 1.1 mrg support the Interix subsystem. See above.
1419 1.10 mrg </p>
1420 1.10 mrg <p>Old target names including *-*-winnt and *-*-windowsnt are no longer used.
1421 1.10 mrg </p>
1422 1.10 mrg <p>PW32 (i386-pc-pw32) support was never completed, and the project seems to
1423 1.1 mrg be inactive. See <a href="http://pw32.sourceforge.net/">http://pw32.sourceforge.net/</a> for more information.
1424 1.10 mrg </p>
1425 1.10 mrg <p>UWIN support has been removed due to a lack of maintenance.
1426 1.10 mrg </p>
1427 1.10 mrg <hr />
1428 1.10 mrg <a name="x-x-cygwin"></a><a name="g_t*-*-cygwin"></a>
1429 1.10 mrg <h3 class="heading">*-*-cygwin</h3>
1430 1.1 mrg <p>Ports of GCC are included with the
1431 1.1 mrg <a href="http://www.cygwin.com/">Cygwin environment</a>.
1432 1.10 mrg </p>
1433 1.10 mrg <p>GCC will build under Cygwin without modification; it does not build
1434 1.10 mrg with Microsoft’s C++ compiler and there are no plans to make it do so.
1435 1.10 mrg </p>
1436 1.10 mrg <p>The Cygwin native compiler can be configured to target any 32-bit x86
1437 1.1 mrg cpu architecture desired; the default is i686-pc-cygwin. It should be
1438 1.1 mrg used with as up-to-date a version of binutils as possible; use either
1439 1.1 mrg the latest official GNU binutils release in the Cygwin distribution,
1440 1.1 mrg or version 2.20 or above if building your own.
1441 1.10 mrg </p>
1442 1.10 mrg <hr />
1443 1.10 mrg <a name="x-x-mingw32"></a><a name="g_t*-*-mingw32"></a>
1444 1.10 mrg <h3 class="heading">*-*-mingw32</h3>
1445 1.10 mrg <p>GCC will build with and support only MinGW runtime 3.12 and later.
1446 1.1 mrg Earlier versions of headers are incompatible with the new default semantics
1447 1.1 mrg of <code>extern inline</code> in <code>-std=c99</code> and <code>-std=gnu99</code> modes.
1448 1.10 mrg </p>
1449 1.10 mrg <hr />
1450 1.10 mrg <a name="older"></a><a name="Older-systems"></a>
1451 1.10 mrg <h3 class="heading">Older systems</h3>
1452 1.1 mrg <p>GCC contains support files for many older (1980s and early
1453 1.1 mrg 1990s) Unix variants. For the most part, support for these systems
1454 1.1 mrg has not been deliberately removed, but it has not been maintained for
1455 1.1 mrg several years and may suffer from bitrot.
1456 1.10 mrg </p>
1457 1.10 mrg <p>Starting with GCC 3.1, each release has a list of “obsoleted” systems.
1458 1.1 mrg Support for these systems is still present in that release, but
1459 1.10 mrg <code>configure</code> will fail unless the <samp>--enable-obsolete</samp>
1460 1.1 mrg option is given. Unless a maintainer steps forward, support for these
1461 1.1 mrg systems will be removed from the next release of GCC.
1462 1.10 mrg </p>
1463 1.10 mrg <p>Support for old systems as hosts for GCC can cause problems if the
1464 1.1 mrg workarounds for compiler, library and operating system bugs affect the
1465 1.1 mrg cleanliness or maintainability of the rest of GCC. In some cases, to
1466 1.1 mrg bring GCC up on such a system, if still possible with current GCC, may
1467 1.1 mrg require first installing an old version of GCC which did work on that
1468 1.1 mrg system, and using it to compile a more recent GCC, to avoid bugs in the
1469 1.1 mrg vendor compiler. Old releases of GCC 1 and GCC 2 are available in the
1470 1.10 mrg <samp>old-releases</samp> directory on the <a href="../mirrors.html">GCC mirror
1471 1.10 mrg sites</a>. Header bugs may generally be avoided using
1472 1.10 mrg <code>fixincludes</code>, but bugs or deficiencies in libraries and the
1473 1.1 mrg operating system may still cause problems.
1474 1.10 mrg </p>
1475 1.10 mrg <p>Support for older systems as targets for cross-compilation is less
1476 1.1 mrg problematic than support for them as hosts for GCC; if an enthusiast
1477 1.1 mrg wishes to make such a target work again (including resurrecting any of
1478 1.1 mrg the targets that never worked with GCC 2, starting from the last
1479 1.1 mrg version before they were removed), patches
1480 1.1 mrg <a href="../contribute.html">following the usual requirements</a> would be
1481 1.1 mrg likely to be accepted, since they should not affect the support for more
1482 1.1 mrg modern targets.
1483 1.10 mrg </p>
1484 1.10 mrg <p>For some systems, old versions of GNU binutils may also be useful,
1485 1.10 mrg and are available from <samp>pub/binutils/old-releases</samp> on
1486 1.9 mrg <a href="https://sourceware.org/mirrors.html">sourceware.org mirror sites</a>.
1487 1.10 mrg </p>
1488 1.10 mrg <p>Some of the information on specific systems above relates to
1489 1.1 mrg such older systems, but much of the information
1490 1.1 mrg about GCC on such systems (which may no longer be applicable to
1491 1.1 mrg current GCC) is to be found in the GCC texinfo manual.
1492 1.10 mrg </p>
1493 1.10 mrg <hr />
1494 1.10 mrg <a name="elf"></a><a name="all-ELF-targets-_0028SVR4_002c-Solaris-2_002c-etc_002e_0029"></a>
1495 1.10 mrg <h3 class="heading">all ELF targets (SVR4, Solaris 2, etc.)</h3>
1496 1.1 mrg <p>C++ support is significantly better on ELF targets if you use the
1497 1.1 mrg <a href="./configure.html#with-gnu-ld">GNU linker</a>; duplicate copies of
1498 1.1 mrg inlines, vtables and template instantiations will be discarded
1499 1.1 mrg automatically.
1500 1.10 mrg </p>
1501 1.1 mrg
1502 1.10 mrg <hr />
1503 1.10 mrg <p>
1504 1.1 mrg <p><a href="./index.html">Return to the GCC Installation page</a>
1505 1.10 mrg </p>
1506 1.10 mrg
1507 1.10 mrg
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1509 1.10 mrg
1510 1.1 mrg
1511 1.1 mrg
1512 1.10 mrg </body>
1513 1.10 mrg </html>
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