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15 1.6 mrg A GNU Manual
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23 1.6 mrg <head>
24 1.6 mrg <title>Installing GCC</title>
25 1.6 mrg
26 1.6 mrg <meta name="description" content="Installing GCC">
27 1.6 mrg <meta name="keywords" content="Installing GCC">
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59 1.6 mrg
60 1.6 mrg
61 1.1 mrg </head>
62 1.1 mrg
63 1.6 mrg <body lang="en">
64 1.6 mrg <h1 class="settitle" align="center">Installing GCC</h1>
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87 1.1 mrg
88 1.1 mrg
89 1.6 mrg <a name="index-Specific"></a>
90 1.6 mrg <a name="index-Specific-installation-notes"></a>
91 1.6 mrg <a name="index-Target-specific-installation"></a>
92 1.6 mrg <a name="index-Host-specific-installation"></a>
93 1.6 mrg <a name="index-Target-specific-installation-notes"></a>
94 1.4 mrg
95 1.6 mrg <p>Please read this document carefully <em>before</em> installing the
96 1.6 mrg GNU Compiler Collection on your machine.
97 1.6 mrg </p>
98 1.6 mrg <p>Note that this list of install notes is <em>not</em> a list of supported
99 1.6 mrg hosts or targets. Not all supported hosts and targets are listed
100 1.6 mrg here, only the ones that require host-specific or target-specific
101 1.6 mrg information have to.
102 1.6 mrg </p>
103 1.6 mrg <ul>
104 1.6 mrg <li> <a href="#aarch64-x-x">aarch64*-*-*</a>
105 1.6 mrg </li><li> <a href="#alpha-x-x">alpha*-*-*</a>
106 1.6 mrg </li><li> <a href="#alpha-dec-osf51">alpha*-dec-osf5.1</a>
107 1.6 mrg </li><li> <a href="#amd64-x-solaris210">amd64-*-solaris2.10</a>
108 1.6 mrg </li><li> <a href="#arm-x-eabi">arm-*-eabi</a>
109 1.6 mrg </li><li> <a href="#avr">avr</a>
110 1.6 mrg </li><li> <a href="#bfin">Blackfin</a>
111 1.6 mrg </li><li> <a href="#dos">DOS</a>
112 1.6 mrg </li><li> <a href="#x-x-freebsd">*-*-freebsd*</a>
113 1.6 mrg </li><li> <a href="#h8300-hms">h8300-hms</a>
114 1.6 mrg </li><li> <a href="#hppa-hp-hpux">hppa*-hp-hpux*</a>
115 1.6 mrg </li><li> <a href="#hppa-hp-hpux10">hppa*-hp-hpux10</a>
116 1.6 mrg </li><li> <a href="#hppa-hp-hpux11">hppa*-hp-hpux11</a>
117 1.6 mrg </li><li> <a href="#x-x-linux-gnu">*-*-linux-gnu</a>
118 1.6 mrg </li><li> <a href="#ix86-x-linux">i?86-*-linux*</a>
119 1.6 mrg </li><li> <a href="#ix86-x-solaris210">i?86-*-solaris2.10</a>
120 1.6 mrg </li><li> <a href="#ia64-x-linux">ia64-*-linux</a>
121 1.6 mrg </li><li> <a href="#ia64-x-hpux">ia64-*-hpux*</a>
122 1.6 mrg </li><li> <a href="#x-ibm-aix">*-ibm-aix*</a>
123 1.6 mrg </li><li> <a href="#iq2000-x-elf">iq2000-*-elf</a>
124 1.6 mrg </li><li> <a href="#lm32-x-elf">lm32-*-elf</a>
125 1.6 mrg </li><li> <a href="#lm32-x-uclinux">lm32-*-uclinux</a>
126 1.6 mrg </li><li> <a href="#m32c-x-elf">m32c-*-elf</a>
127 1.6 mrg </li><li> <a href="#m32r-x-elf">m32r-*-elf</a>
128 1.6 mrg </li><li> <a href="#m68k-x-x">m68k-*-*</a>
129 1.6 mrg </li><li> <a href="#m68k-uclinux">m68k-uclinux</a>
130 1.6 mrg </li><li> <a href="#mep-x-elf">mep-*-elf</a>
131 1.6 mrg </li><li> <a href="#microblaze-x-elf">microblaze-*-elf</a>
132 1.6 mrg </li><li> <a href="#mips-x-x">mips-*-*</a>
133 1.6 mrg </li><li> <a href="#mips-sgi-irix5">mips-sgi-irix5</a>
134 1.6 mrg </li><li> <a href="#mips-sgi-irix6">mips-sgi-irix6</a>
135 1.6 mrg </li><li> <a href="#nds32le-x-elf">nds32le-*-elf</a>
136 1.6 mrg </li><li> <a href="#nds32be-x-elf">nds32be-*-elf</a>
137 1.6 mrg </li><li> <a href="#nvptx-x-none">nvptx-*-none</a>
138 1.6 mrg </li><li> <a href="#powerpc-x-x">powerpc*-*-*</a>
139 1.6 mrg </li><li> <a href="#powerpc-x-darwin">powerpc-*-darwin*</a>
140 1.6 mrg </li><li> <a href="#powerpc-x-elf">powerpc-*-elf</a>
141 1.6 mrg </li><li> <a href="#powerpc-x-linux-gnu">powerpc*-*-linux-gnu*</a>
142 1.6 mrg </li><li> <a href="#powerpc-x-netbsd">powerpc-*-netbsd*</a>
143 1.6 mrg </li><li> <a href="#powerpc-x-eabisim">powerpc-*-eabisim</a>
144 1.6 mrg </li><li> <a href="#powerpc-x-eabi">powerpc-*-eabi</a>
145 1.6 mrg </li><li> <a href="#powerpcle-x-elf">powerpcle-*-elf</a>
146 1.6 mrg </li><li> <a href="#powerpcle-x-eabisim">powerpcle-*-eabisim</a>
147 1.6 mrg </li><li> <a href="#powerpcle-x-eabi">powerpcle-*-eabi</a>
148 1.6 mrg </li><li> <a href="#s390-x-linux">s390-*-linux*</a>
149 1.6 mrg </li><li> <a href="#s390x-x-linux">s390x-*-linux*</a>
150 1.6 mrg </li><li> <a href="#s390x-ibm-tpf">s390x-ibm-tpf*</a>
151 1.6 mrg </li><li> <a href="#x-x-solaris2">*-*-solaris2*</a>
152 1.6 mrg </li><li> <a href="#sparc-x-x">sparc*-*-*</a>
153 1.6 mrg </li><li> <a href="#sparc-sun-solaris2">sparc-sun-solaris2*</a>
154 1.6 mrg </li><li> <a href="#sparc-sun-solaris210">sparc-sun-solaris2.10</a>
155 1.6 mrg </li><li> <a href="#sparc-x-linux">sparc-*-linux*</a>
156 1.6 mrg </li><li> <a href="#sparc64-x-solaris2">sparc64-*-solaris2*</a>
157 1.6 mrg </li><li> <a href="#sparcv9-x-solaris2">sparcv9-*-solaris2*</a>
158 1.6 mrg </li><li> <a href="#c6x-x-x">c6x-*-*</a>
159 1.6 mrg </li><li> <a href="#tilegx-x-linux">tilegx-*-linux*</a>
160 1.6 mrg </li><li> <a href="#tilegxbe-x-linux">tilegxbe-*-linux*</a>
161 1.6 mrg </li><li> <a href="#tilepro-x-linux">tilepro-*-linux*</a>
162 1.6 mrg </li><li> <a href="#visium-x-elf">visium-*-elf</a>
163 1.6 mrg </li><li> <a href="#x-x-vxworks">*-*-vxworks*</a>
164 1.6 mrg </li><li> <a href="#x86-64-x-x">x86_64-*-*, amd64-*-*</a>
165 1.6 mrg </li><li> <a href="#x86-64-x-solaris210">x86_64-*-solaris2.1[0-9]*</a>
166 1.6 mrg </li><li> <a href="#xtensa-x-elf">xtensa*-*-elf</a>
167 1.6 mrg </li><li> <a href="#xtensa-x-linux">xtensa*-*-linux*</a>
168 1.6 mrg </li><li> <a href="#windows">Microsoft Windows</a>
169 1.6 mrg </li><li> <a href="#x-x-cygwin">*-*-cygwin</a>
170 1.6 mrg </li><li> <a href="#x-x-interix">*-*-interix</a>
171 1.6 mrg </li><li> <a href="#x-x-mingw32">*-*-mingw32</a>
172 1.6 mrg </li><li> <a href="#os2">OS/2</a>
173 1.6 mrg </li><li> <a href="#older">Older systems</a>
174 1.6 mrg </li></ul>
175 1.6 mrg
176 1.6 mrg <ul>
177 1.6 mrg <li> <a href="#elf">all ELF targets</a> (SVR4, Solaris 2, etc.)
178 1.6 mrg </li></ul>
179 1.6 mrg
180 1.6 mrg
181 1.6 mrg <!-- -------- host/target specific issues start here ---------------- -->
182 1.6 mrg <hr />
183 1.6 mrg <a name="aarch64_002dx_002dx"></a><a name="aarch64_002a_002d_002a_002d_002a"></a>
184 1.6 mrg <h3 class="heading">aarch64*-*-*</h3>
185 1.6 mrg <p>Binutils pre 2.24 does not have support for selecting <samp>-mabi</samp> and
186 1.5 mrg does not support ILP32. If it is used to build GCC 4.9 or later, GCC will
187 1.6 mrg not support option <samp>-mabi=ilp32</samp>.
188 1.6 mrg </p>
189 1.6 mrg <p>To enable a workaround for the Cortex-A53 erratum number 835769 by default
190 1.4 mrg (for all CPUs regardless of -mcpu option given) at configure time use the
191 1.6 mrg <samp>--enable-fix-cortex-a53-835769</samp> option. This will enable the fix by
192 1.5 mrg default and can be explicitly disabled during compilation by passing the
193 1.6 mrg <samp>-mno-fix-cortex-a53-835769</samp> option. Conversely,
194 1.6 mrg <samp>--disable-fix-cortex-a53-835769</samp> will disable the workaround by
195 1.4 mrg default. The workaround is disabled by default if neither of
196 1.6 mrg <samp>--enable-fix-cortex-a53-835769</samp> or
197 1.6 mrg <samp>--disable-fix-cortex-a53-835769</samp> is given at configure time.
198 1.6 mrg </p>
199 1.6 mrg <p>To enable a workaround for the Cortex-A53 erratum number 843419 by default
200 1.5 mrg (for all CPUs regardless of -mcpu option given) at configure time use the
201 1.6 mrg <samp>--enable-fix-cortex-a53-843419</samp> option. This workaround is applied at
202 1.5 mrg link time. Enabling the workaround will cause GCC to pass the relevant option
203 1.5 mrg to the linker. It can be explicitly disabled during compilation by passing the
204 1.6 mrg <samp>-mno-fix-cortex-a53-843419</samp> option. Conversely,
205 1.6 mrg <samp>--disable-fix-cortex-a53-843419</samp> will disable the workaround by default.
206 1.5 mrg The workaround is disabled by default if neither of
207 1.6 mrg <samp>--enable-fix-cortex-a53-843419</samp> or
208 1.6 mrg <samp>--disable-fix-cortex-a53-843419</samp> is given at configure time.
209 1.6 mrg </p>
210 1.6 mrg <hr />
211 1.6 mrg <a name="alpha_002dx_002dx"></a><a name="alpha_002a_002d_002a_002d_002a"></a>
212 1.6 mrg <h3 class="heading">alpha*-*-*</h3>
213 1.1 mrg <p>This section contains general configuration information for all
214 1.1 mrg alpha-based platforms using ELF (in particular, ignore this section for
215 1.1 mrg DEC OSF/1, Digital UNIX and Tru64 UNIX). In addition to reading this
216 1.1 mrg section, please read all other sections that match your target.
217 1.6 mrg </p>
218 1.6 mrg <p>We require binutils 2.11.2 or newer.
219 1.1 mrg Previous binutils releases had a number of problems with DWARF 2
220 1.1 mrg debugging information, not the least of which is incorrect linking of
221 1.1 mrg shared libraries.
222 1.6 mrg </p>
223 1.6 mrg <hr />
224 1.6 mrg <a name="alpha_002ddec_002dosf51"></a><a name="alpha_002a_002ddec_002dosf5_002e1"></a>
225 1.6 mrg <h3 class="heading">alpha*-dec-osf5.1</h3>
226 1.1 mrg <p>Systems using processors that implement the DEC Alpha architecture and
227 1.1 mrg are running the DEC/Compaq/HP Unix (DEC OSF/1, Digital UNIX, or Compaq/HP
228 1.1 mrg Tru64 UNIX) operating system, for example the DEC Alpha AXP systems.
229 1.6 mrg </p>
230 1.6 mrg <p>Support for Tru64 UNIX V5.1 has been removed in GCC 4.8. As of GCC 4.6,
231 1.3 skrll support for Tru64 UNIX V4.0 and V5.0 has been removed. As of GCC 3.2,
232 1.3 skrll versions before <code>alpha*-dec-osf4</code> are no longer supported. (These
233 1.3 skrll are the versions which identify themselves as DEC OSF/1.)
234 1.6 mrg </p>
235 1.6 mrg <hr />
236 1.6 mrg <a name="amd64_002dx_002dsolaris210"></a><a name="amd64_002d_002a_002dsolaris2_002e1_005b0_002d9_005d_002a"></a>
237 1.6 mrg <h3 class="heading">amd64-*-solaris2.1[0-9]*</h3>
238 1.6 mrg <p>This is a synonym for ‘<samp>x86_64-*-solaris2.1[0-9]*</samp>’.
239 1.6 mrg </p>
240 1.6 mrg <hr />
241 1.6 mrg <a name="arc_002dx_002delf32"></a><a name="arc_002d_002a_002delf32"></a>
242 1.6 mrg <h3 class="heading">arc-*-elf32</h3>
243 1.6 mrg
244 1.6 mrg <p>Use ‘<samp>configure --target=arc-elf32 --with-cpu=<var>cpu</var> --enable-languages="c,c++"</samp>’
245 1.6 mrg to configure GCC, with <var>cpu</var> being one of ‘<samp>arc600</samp>’, ‘<samp>arc601</samp>’,
246 1.6 mrg or ‘<samp>arc700</samp>’.
247 1.6 mrg </p>
248 1.6 mrg <hr />
249 1.6 mrg <a name="arc_002dlinux_002duclibc"></a><a name="arc_002dlinux_002duclibc-1"></a>
250 1.6 mrg <h3 class="heading">arc-linux-uclibc</h3>
251 1.6 mrg
252 1.6 mrg <p>Use ‘<samp>configure --target=arc-linux-uclibc --with-cpu=arc700 --enable-languages="c,c++"</samp>’ to configure GCC.
253 1.6 mrg </p>
254 1.6 mrg <hr />
255 1.6 mrg <a name="arm_002dx_002deabi"></a><a name="arm_002d_002a_002deabi"></a>
256 1.6 mrg <h3 class="heading">arm-*-eabi</h3>
257 1.1 mrg <p>ARM-family processors. Subtargets that use the ELF object format
258 1.1 mrg require GNU binutils 2.13 or newer. Such subtargets include:
259 1.3 skrll <code>arm-*-netbsdelf</code>, <code>arm-*-*linux-*</code>
260 1.3 skrll and <code>arm-*-rtemseabi</code>.
261 1.6 mrg </p>
262 1.6 mrg <hr />
263 1.6 mrg <a name="avr"></a><a name="avr-1"></a>
264 1.6 mrg <h3 class="heading">avr</h3>
265 1.1 mrg <p>ATMEL AVR-family micro controllers. These are used in embedded
266 1.6 mrg applications. There are no standard Unix configurations.
267 1.1 mrg See “AVR Options” in the main manual
268 1.1 mrg for the list of supported MCU types.
269 1.6 mrg </p>
270 1.6 mrg <p>Use ‘<samp>configure --target=avr --enable-languages="c"</samp>’ to configure GCC.
271 1.6 mrg </p>
272 1.6 mrg <p>Further installation notes and other useful information about AVR tools
273 1.1 mrg can also be obtained from:
274 1.6 mrg </p>
275 1.6 mrg <ul>
276 1.6 mrg <li> <a href="http://www.nongnu.org/avr/">http://www.nongnu.org/avr/</a>
277 1.6 mrg </li><li> <a href="http://www.amelek.gda.pl/avr/">http://www.amelek.gda.pl/avr/</a>
278 1.6 mrg </li></ul>
279 1.6 mrg
280 1.6 mrg <p>We <em>strongly</em> recommend using binutils 2.13 or newer.
281 1.6 mrg </p>
282 1.6 mrg <p>The following error:
283 1.6 mrg </p><div class="smallexample">
284 1.6 mrg <pre class="smallexample">Error: register required
285 1.6 mrg </pre></div>
286 1.6 mrg
287 1.6 mrg <p>indicates that you should upgrade to a newer version of the binutils.
288 1.6 mrg </p>
289 1.6 mrg <hr />
290 1.6 mrg <a name="bfin"></a><a name="Blackfin"></a>
291 1.6 mrg <h3 class="heading">Blackfin</h3>
292 1.6 mrg <p>The Blackfin processor, an Analog Devices DSP.
293 1.1 mrg See “Blackfin Options” in the main manual
294 1.6 mrg </p>
295 1.6 mrg <p>More information, and a version of binutils with support for this processor,
296 1.1 mrg is available at <a href="http://blackfin.uclinux.org">http://blackfin.uclinux.org</a>
297 1.6 mrg </p>
298 1.6 mrg <hr />
299 1.6 mrg <a name="cr16"></a><a name="CR16"></a>
300 1.6 mrg <h3 class="heading">CR16</h3>
301 1.5 mrg <p>The CR16 CompactRISC architecture is a 16-bit architecture. This
302 1.5 mrg architecture is used in embedded applications.
303 1.6 mrg </p>
304 1.3 skrll
305 1.6 mrg <p>See “CR16 Options” in the main manual for a list of CR16-specific options.
306 1.6 mrg </p>
307 1.6 mrg <p>Use ‘<samp>configure --target=cr16-elf --enable-languages=c,c++</samp>’ to configure
308 1.6 mrg GCC for building a CR16 elf cross-compiler.
309 1.6 mrg </p>
310 1.6 mrg <p>Use ‘<samp>configure --target=cr16-uclinux --enable-languages=c,c++</samp>’ to
311 1.6 mrg configure GCC for building a CR16 uclinux cross-compiler.
312 1.6 mrg </p>
313 1.6 mrg <hr />
314 1.6 mrg <a name="cris"></a><a name="CRIS"></a>
315 1.6 mrg <h3 class="heading">CRIS</h3>
316 1.1 mrg <p>CRIS is the CPU architecture in Axis Communications ETRAX system-on-a-chip
317 1.1 mrg series. These are used in embedded applications.
318 1.6 mrg </p>
319 1.6 mrg <p>See “CRIS Options” in the main manual
320 1.1 mrg for a list of CRIS-specific options.
321 1.6 mrg </p>
322 1.6 mrg <p>There are a few different CRIS targets:
323 1.6 mrg </p><dl compact="compact">
324 1.6 mrg <dt><code>cris-axis-elf</code></dt>
325 1.6 mrg <dd><p>Mainly for monolithic embedded systems. Includes a multilib for the
326 1.6 mrg ‘<samp>v10</samp>’ core used in ‘<samp>ETRAX 100 LX</samp>’.
327 1.6 mrg </p></dd>
328 1.6 mrg <dt><code>cris-axis-linux-gnu</code></dt>
329 1.6 mrg <dd><p>A GNU/Linux port for the CRIS architecture, currently targeting
330 1.6 mrg ‘<samp>ETRAX 100 LX</samp>’ by default.
331 1.6 mrg </p></dd>
332 1.1 mrg </dl>
333 1.1 mrg
334 1.6 mrg <p>For <code>cris-axis-elf</code> you need binutils 2.11
335 1.1 mrg or newer. For <code>cris-axis-linux-gnu</code> you need binutils 2.12 or newer.
336 1.6 mrg </p>
337 1.6 mrg <p>Pre-packaged tools can be obtained from
338 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
339 1.1 mrg information about this platform is available at
340 1.1 mrg <a href="http://developer.axis.com/">http://developer.axis.com/</a>.
341 1.6 mrg </p>
342 1.6 mrg <hr />
343 1.6 mrg <a name="dos"></a><a name="DOS"></a>
344 1.6 mrg <h3 class="heading">DOS</h3>
345 1.1 mrg <p>Please have a look at the <a href="binaries.html">binaries page</a>.
346 1.6 mrg </p>
347 1.6 mrg <p>You cannot install GCC by itself on MSDOS; it will not compile under
348 1.1 mrg any MSDOS compiler except itself. You need to get the complete
349 1.1 mrg compilation package DJGPP, which includes binaries as well as sources,
350 1.1 mrg and includes all the necessary compilation tools and libraries.
351 1.6 mrg </p>
352 1.6 mrg <hr />
353 1.6 mrg <a name="epiphany_002dx_002delf"></a><a name="epiphany_002d_002a_002delf"></a>
354 1.6 mrg <h3 class="heading">epiphany-*-elf</h3>
355 1.6 mrg <p>Adapteva Epiphany.
356 1.3 skrll This configuration is intended for embedded systems.
357 1.6 mrg </p>
358 1.6 mrg <hr />
359 1.6 mrg <a name="x_002dx_002dfreebsd"></a><a name="g_t_002a_002d_002a_002dfreebsd_002a"></a>
360 1.6 mrg <h3 class="heading">*-*-freebsd*</h3>
361 1.1 mrg <p>Support for FreeBSD 1 was discontinued in GCC 3.2. Support for
362 1.1 mrg FreeBSD 2 (and any mutant a.out variants of FreeBSD 3) was
363 1.1 mrg discontinued in GCC 4.0.
364 1.6 mrg </p>
365 1.6 mrg <p>In order to better utilize FreeBSD base system functionality and match
366 1.3 skrll the configuration of the system compiler, GCC 4.5 and above as well as
367 1.3 skrll GCC 4.4 past 2010-06-20 leverage SSP support in libc (which is present
368 1.3 skrll on FreeBSD 7 or later) and the use of <code>__cxa_atexit</code> by default
369 1.3 skrll (on FreeBSD 6 or later). The use of <code>dl_iterate_phdr</code> inside
370 1.6 mrg <samp>libgcc_s.so.1</samp> and boehm-gc (on FreeBSD 7 or later) is enabled
371 1.3 skrll by GCC 4.5 and above.
372 1.6 mrg </p>
373 1.6 mrg <p>We support FreeBSD using the ELF file format with DWARF 2 debugging
374 1.6 mrg for all CPU architectures. You may use <samp>-gstabs</samp> instead of
375 1.6 mrg <samp>-g</samp>, if you really want the old debugging format. There are
376 1.1 mrg no known issues with mixing object files and libraries with different
377 1.1 mrg debugging formats. Otherwise, this release of GCC should now match
378 1.1 mrg more of the configuration used in the stock FreeBSD configuration of
379 1.6 mrg GCC. In particular, <samp>--enable-threads</samp> is now configured by
380 1.1 mrg default. However, as a general user, do not attempt to replace the
381 1.1 mrg system compiler with this release. Known to bootstrap and check with
382 1.1 mrg good results on FreeBSD 7.2-STABLE. In the past, known to bootstrap
383 1.1 mrg and check with good results on FreeBSD 3.0, 3.4, 4.0, 4.2, 4.3, 4.4,
384 1.1 mrg 4.5, 4.8, 4.9 and 5-CURRENT.
385 1.6 mrg </p>
386 1.6 mrg <p>The version of binutils installed in <samp>/usr/bin</samp> probably works
387 1.1 mrg with this release of GCC. Bootstrapping against the latest GNU
388 1.6 mrg binutils and/or the version found in <samp>/usr/ports/devel/binutils</samp> has
389 1.1 mrg been known to enable additional features and improve overall testsuite
390 1.1 mrg results. However, it is currently known that boehm-gc (which itself
391 1.1 mrg is required for java) may not configure properly on FreeBSD prior to
392 1.1 mrg the FreeBSD 7.0 release with GNU binutils after 2.16.1.
393 1.6 mrg </p>
394 1.6 mrg <hr />
395 1.6 mrg <a name="h8300_002dhms"></a><a name="h8300_002dhms-1"></a>
396 1.6 mrg <h3 class="heading">h8300-hms</h3>
397 1.1 mrg <p>Renesas H8/300 series of processors.
398 1.6 mrg </p>
399 1.6 mrg <p>Please have a look at the <a href="binaries.html">binaries page</a>.
400 1.6 mrg </p>
401 1.6 mrg <p>The calling convention and structure layout has changed in release 2.6.
402 1.1 mrg All code must be recompiled. The calling convention now passes the
403 1.1 mrg first three arguments in function calls in registers. Structures are no
404 1.1 mrg longer a multiple of 2 bytes.
405 1.6 mrg </p>
406 1.6 mrg <hr />
407 1.6 mrg <a name="hppa_002dhp_002dhpux"></a><a name="hppa_002a_002dhp_002dhpux_002a"></a>
408 1.6 mrg <h3 class="heading">hppa*-hp-hpux*</h3>
409 1.1 mrg <p>Support for HP-UX version 9 and older was discontinued in GCC 3.4.
410 1.6 mrg </p>
411 1.6 mrg <p>We require using gas/binutils on all hppa platforms. Version 2.19 or
412 1.1 mrg later is recommended.
413 1.6 mrg </p>
414 1.6 mrg <p>It may be helpful to configure GCC with the
415 1.6 mrg <a href="./configure.html#with-gnu-as"><samp>--with-gnu-as</samp></a> and
416 1.6 mrg <samp>--with-as=…</samp> options to ensure that GCC can find GAS.
417 1.6 mrg </p>
418 1.6 mrg <p>The HP assembler should not be used with GCC. It is rarely tested and may
419 1.6 mrg not work. It shouldn’t be used with any languages other than C due to its
420 1.1 mrg many limitations.
421 1.6 mrg </p>
422 1.6 mrg <p>Specifically, <samp>-g</samp> does not work (HP-UX uses a peculiar debugging
423 1.1 mrg format which GCC does not know about). It also inserts timestamps
424 1.1 mrg into each object file it creates, causing the 3-stage comparison test to
425 1.1 mrg fail during a bootstrap. You should be able to continue by saying
426 1.6 mrg ‘<samp>make all-host all-target</samp>’ after getting the failure from ‘<samp>make</samp>’.
427 1.6 mrg </p>
428 1.6 mrg <p>Various GCC features are not supported. For example, it does not support weak
429 1.1 mrg symbols or alias definitions. As a result, explicit template instantiations
430 1.1 mrg are required when using C++. This makes it difficult if not impossible to
431 1.1 mrg build many C++ applications.
432 1.6 mrg </p>
433 1.6 mrg <p>There are two default scheduling models for instructions. These are
434 1.1 mrg PROCESSOR_7100LC and PROCESSOR_8000. They are selected from the pa-risc
435 1.6 mrg architecture specified for the target machine when configuring.
436 1.1 mrg PROCESSOR_8000 is the default. PROCESSOR_7100LC is selected when
437 1.6 mrg the target is a ‘<samp>hppa1*</samp>’ machine.
438 1.6 mrg </p>
439 1.6 mrg <p>The PROCESSOR_8000 model is not well suited to older processors. Thus,
440 1.1 mrg it is important to completely specify the machine architecture when
441 1.1 mrg configuring if you want a model other than PROCESSOR_8000. The macro
442 1.1 mrg TARGET_SCHED_DEFAULT can be defined in BOOT_CFLAGS if a different
443 1.1 mrg default scheduling model is desired.
444 1.6 mrg </p>
445 1.6 mrg <p>As of GCC 4.0, GCC uses the UNIX 95 namespace for HP-UX 10.10
446 1.6 mrg through 11.00, and the UNIX 98 namespace for HP-UX 11.11 and later.
447 1.1 mrg This namespace change might cause problems when bootstrapping with
448 1.1 mrg an earlier version of GCC or the HP compiler as essentially the same
449 1.1 mrg namespace is required for an entire build. This problem can be avoided
450 1.6 mrg in a number of ways. With HP cc, <code>UNIX_STD</code> can be set to ‘<samp>95</samp>’
451 1.6 mrg or ‘<samp>98</samp>’. Another way is to add an appropriate set of predefines
452 1.6 mrg to <code>CC</code>. The description for the <samp>munix=</samp> option contains
453 1.1 mrg a list of the predefines used with each standard.
454 1.6 mrg </p>
455 1.6 mrg <p>More specific information to ‘<samp>hppa*-hp-hpux*</samp>’ targets follows.
456 1.6 mrg </p>
457 1.6 mrg <hr />
458 1.6 mrg <a name="hppa_002dhp_002dhpux10"></a><a name="hppa_002a_002dhp_002dhpux10"></a>
459 1.6 mrg <h3 class="heading">hppa*-hp-hpux10</h3>
460 1.1 mrg <p>For hpux10.20, we <em>highly</em> recommend you pick up the latest sed patch
461 1.1 mrg <code>PHCO_19798</code> from HP.
462 1.6 mrg </p>
463 1.6 mrg <p>The C++ ABI has changed incompatibly in GCC 4.0. COMDAT subspaces are
464 1.1 mrg used for one-only code and data. This resolves many of the previous
465 1.1 mrg problems in using C++ on this target. However, the ABI is not compatible
466 1.1 mrg with the one implemented under HP-UX 11 using secondary definitions.
467 1.6 mrg </p>
468 1.6 mrg <hr />
469 1.6 mrg <a name="hppa_002dhp_002dhpux11"></a><a name="hppa_002a_002dhp_002dhpux11"></a>
470 1.6 mrg <h3 class="heading">hppa*-hp-hpux11</h3>
471 1.1 mrg <p>GCC 3.0 and up support HP-UX 11. GCC 2.95.x is not supported and cannot
472 1.1 mrg be used to compile GCC 3.0 and up.
473 1.6 mrg </p>
474 1.6 mrg <p>The libffi and libjava libraries haven’t been ported to 64-bit HP-UX and don’t build.
475 1.6 mrg </p>
476 1.6 mrg <p>Refer to <a href="binaries.html">binaries</a> for information about obtaining
477 1.1 mrg precompiled GCC binaries for HP-UX. Precompiled binaries must be obtained
478 1.6 mrg to build the Ada language as it can’t be bootstrapped using C. Ada is
479 1.1 mrg only available for the 32-bit PA-RISC runtime.
480 1.6 mrg </p>
481 1.6 mrg <p>Starting with GCC 3.4 an ISO C compiler is required to bootstrap. The
482 1.6 mrg bundled compiler supports only traditional C; you will need either HP’s
483 1.1 mrg unbundled compiler, or a binary distribution of GCC.
484 1.6 mrg </p>
485 1.6 mrg <p>It is possible to build GCC 3.3 starting with the bundled HP compiler,
486 1.1 mrg but the process requires several steps. GCC 3.3 can then be used to
487 1.1 mrg build later versions. The fastjar program contains ISO C code and
488 1.6 mrg can’t be built with the HP bundled compiler. This problem can be
489 1.1 mrg avoided by not building the Java language. For example, use the
490 1.6 mrg <samp>--enable-languages="c,c++,f77,objc"</samp> option in your configure
491 1.1 mrg command.
492 1.6 mrg </p>
493 1.6 mrg <p>There are several possible approaches to building the distribution.
494 1.1 mrg Binutils can be built first using the HP tools. Then, the GCC
495 1.1 mrg distribution can be built. The second approach is to build GCC
496 1.6 mrg first using the HP tools, then build binutils, then rebuild GCC.
497 1.1 mrg There have been problems with various binary distributions, so it
498 1.1 mrg is best not to start from a binary distribution.
499 1.6 mrg </p>
500 1.6 mrg <p>On 64-bit capable systems, there are two distinct targets. Different
501 1.1 mrg installation prefixes must be used if both are to be installed on
502 1.6 mrg the same system. The ‘<samp>hppa[1-2]*-hp-hpux11*</samp>’ target generates code
503 1.6 mrg for the 32-bit PA-RISC runtime architecture and uses the HP linker.
504 1.6 mrg The ‘<samp>hppa64-hp-hpux11*</samp>’ target generates 64-bit code for the
505 1.1 mrg PA-RISC 2.0 architecture.
506 1.6 mrg </p>
507 1.6 mrg <p>The script config.guess now selects the target type based on the compiler
508 1.6 mrg detected during configuration. You must define <code>PATH</code> or <code>CC</code> so
509 1.6 mrg that configure finds an appropriate compiler for the initial bootstrap.
510 1.6 mrg When <code>CC</code> is used, the definition should contain the options that are
511 1.6 mrg needed whenever <code>CC</code> is used.
512 1.6 mrg </p>
513 1.6 mrg <p>Specifically, options that determine the runtime architecture must be
514 1.6 mrg in <code>CC</code> to correctly select the target for the build. It is also
515 1.6 mrg convenient to place many other compiler options in <code>CC</code>. For example,
516 1.6 mrg <code>CC="cc -Ac +DA2.0W -Wp,-H16376 -D_CLASSIC_TYPES -D_HPUX_SOURCE"</code>
517 1.1 mrg can be used to bootstrap the GCC 3.3 branch with the HP compiler in
518 1.6 mrg 64-bit K&R/bundled mode. The <samp>+DA2.0W</samp> option will result in
519 1.6 mrg the automatic selection of the ‘<samp>hppa64-hp-hpux11*</samp>’ target. The
520 1.1 mrg macro definition table of cpp needs to be increased for a successful
521 1.1 mrg build with the HP compiler. _CLASSIC_TYPES and _HPUX_SOURCE need to
522 1.1 mrg be defined when building with the bundled compiler, or when using the
523 1.6 mrg <samp>-Ac</samp> option. These defines aren’t necessary with <samp>-Ae</samp>.
524 1.6 mrg </p>
525 1.6 mrg <p>It is best to explicitly configure the ‘<samp>hppa64-hp-hpux11*</samp>’ target
526 1.6 mrg with the <samp>--with-ld=…</samp> option. This overrides the standard
527 1.1 mrg search for ld. The two linkers supported on this target require different
528 1.1 mrg commands. The default linker is determined during configuration. As a
529 1.6 mrg result, it’s not possible to switch linkers in the middle of a GCC build.
530 1.1 mrg This has been reported to sometimes occur in unified builds of binutils
531 1.1 mrg and GCC.
532 1.6 mrg </p>
533 1.6 mrg <p>A recent linker patch must be installed for the correct operation of
534 1.1 mrg GCC 3.3 and later. <code>PHSS_26559</code> and <code>PHSS_24304</code> are the
535 1.1 mrg oldest linker patches that are known to work. They are for HP-UX
536 1.1 mrg 11.00 and 11.11, respectively. <code>PHSS_24303</code>, the companion to
537 1.6 mrg <code>PHSS_24304</code>, might be usable but it hasn’t been tested. These
538 1.1 mrg patches have been superseded. Consult the HP patch database to obtain
539 1.1 mrg the currently recommended linker patch for your system.
540 1.6 mrg </p>
541 1.6 mrg <p>The patches are necessary for the support of weak symbols on the
542 1.1 mrg 32-bit port, and for the running of initializers and finalizers. Weak
543 1.1 mrg symbols are implemented using SOM secondary definition symbols. Prior
544 1.6 mrg to HP-UX 11, there are bugs in the linker support for secondary symbols.
545 1.1 mrg The patches correct a problem of linker core dumps creating shared
546 1.1 mrg libraries containing secondary symbols, as well as various other
547 1.1 mrg linking issues involving secondary symbols.
548 1.6 mrg </p>
549 1.6 mrg <p>GCC 3.3 uses the ELF DT_INIT_ARRAY and DT_FINI_ARRAY capabilities to
550 1.1 mrg run initializers and finalizers on the 64-bit port. The 32-bit port
551 1.6 mrg uses the linker <samp>+init</samp> and <samp>+fini</samp> options for the same
552 1.1 mrg purpose. The patches correct various problems with the +init/+fini
553 1.1 mrg options, including program core dumps. Binutils 2.14 corrects a
554 1.6 mrg problem on the 64-bit port resulting from HP’s non-standard use of
555 1.1 mrg the .init and .fini sections for array initializers and finalizers.
556 1.6 mrg </p>
557 1.6 mrg <p>Although the HP and GNU linkers are both supported for the
558 1.6 mrg ‘<samp>hppa64-hp-hpux11*</samp>’ target, it is strongly recommended that the
559 1.1 mrg HP linker be used for link editing on this target.
560 1.6 mrg </p>
561 1.6 mrg <p>At this time, the GNU linker does not support the creation of long
562 1.6 mrg branch stubs. As a result, it can’t successfully link binaries
563 1.1 mrg containing branch offsets larger than 8 megabytes. In addition,
564 1.1 mrg there are problems linking shared libraries, linking executables
565 1.6 mrg with <samp>-static</samp>, and with dwarf2 unwind and exception support.
566 1.6 mrg It also doesn’t provide stubs for internal calls to global functions
567 1.6 mrg in shared libraries, so these calls can’t be overloaded.
568 1.6 mrg </p>
569 1.6 mrg <p>The HP dynamic loader does not support GNU symbol versioning, so symbol
570 1.1 mrg versioning is not supported. It may be necessary to disable symbol
571 1.6 mrg versioning with <samp>--disable-symvers</samp> when using GNU ld.
572 1.6 mrg </p>
573 1.6 mrg <p>POSIX threads are the default. The optional DCE thread library is not
574 1.6 mrg supported, so <samp>--enable-threads=dce</samp> does not work.
575 1.6 mrg </p>
576 1.6 mrg <hr />
577 1.6 mrg <a name="x_002dx_002dlinux_002dgnu"></a><a name="g_t_002a_002d_002a_002dlinux_002dgnu"></a>
578 1.6 mrg <h3 class="heading">*-*-linux-gnu</h3>
579 1.1 mrg <p>Versions of libstdc++-v3 starting with 3.2.1 require bug fixes present
580 1.1 mrg in glibc 2.2.5 and later. More information is available in the
581 1.1 mrg libstdc++-v3 documentation.
582 1.6 mrg </p>
583 1.6 mrg <hr />
584 1.6 mrg <a name="ix86_002dx_002dlinux"></a><a name="i_003f86_002d_002a_002dlinux_002a"></a>
585 1.6 mrg <h3 class="heading">i?86-*-linux*</h3>
586 1.6 mrg <p>As of GCC 3.3, binutils 2.13.1 or later is required for this platform.
587 1.1 mrg See <a href="http://gcc.gnu.org/PR10877">bug 10877</a> for more information.
588 1.6 mrg </p>
589 1.6 mrg <p>If you receive Signal 11 errors when building on GNU/Linux, then it is
590 1.1 mrg possible you have a hardware problem. Further information on this can be
591 1.1 mrg found on <a href="http://www.bitwizard.nl/sig11/">www.bitwizard.nl</a>.
592 1.6 mrg </p>
593 1.6 mrg <hr />
594 1.6 mrg <a name="ix86_002dx_002dsolaris210"></a><a name="i_003f86_002d_002a_002dsolaris2_002e10"></a>
595 1.6 mrg <h3 class="heading">i?86-*-solaris2.10</h3>
596 1.3 skrll <p>Use this for Solaris 10 or later on x86 and x86-64 systems. Starting
597 1.6 mrg with GCC 4.7, there is also a 64-bit ‘<samp>amd64-*-solaris2.1[0-9]*</samp>’ or
598 1.6 mrg ‘<samp>x86_64-*-solaris2.1[0-9]*</samp>’ configuration that corresponds to
599 1.6 mrg ‘<samp>sparcv9-sun-solaris2*</samp>’.
600 1.6 mrg </p>
601 1.6 mrg <p>It is recommended that you configure GCC to use the GNU assembler, in
602 1.6 mrg <samp>/usr/sfw/bin/gas</samp>. The versions included in Solaris 10, from GNU
603 1.1 mrg binutils 2.15, and Solaris 11, from GNU binutils 2.19, work fine,
604 1.1 mrg although the current version, from GNU binutils
605 1.3 skrll 2.22, is known to work, too. Recent versions of the Sun assembler in
606 1.6 mrg <samp>/usr/ccs/bin/as</samp> work almost as well, though.
607 1.6 mrg </p>
608 1.6 mrg <p>For linking, the Sun linker, is preferred. If you want to use the GNU
609 1.6 mrg linker instead, which is available in <samp>/usr/sfw/bin/gld</samp>, note that
610 1.1 mrg due to a packaging bug the version in Solaris 10, from GNU binutils
611 1.1 mrg 2.15, cannot be used, while the version in Solaris 11, from GNU binutils
612 1.3 skrll 2.19, works, as does the latest version, from GNU binutils 2.22.
613 1.6 mrg </p>
614 1.6 mrg <p>To use GNU <code>as</code>, configure with the options
615 1.6 mrg <samp>--with-gnu-as --with-as=/usr/sfw/bin/gas</samp>. It may be necessary
616 1.6 mrg to configure with <samp>--without-gnu-ld --with-ld=/usr/ccs/bin/ld</samp> to
617 1.6 mrg guarantee use of Sun <code>ld</code>.
618 1.6 mrg </p>
619 1.6 mrg <hr />
620 1.6 mrg <a name="ia64_002dx_002dlinux"></a><a name="ia64_002d_002a_002dlinux"></a>
621 1.6 mrg <h3 class="heading">ia64-*-linux</h3>
622 1.1 mrg <p>IA-64 processor (also known as IPF, or Itanium Processor Family)
623 1.1 mrg running GNU/Linux.
624 1.6 mrg </p>
625 1.6 mrg <p>If you are using the installed system libunwind library with
626 1.6 mrg <samp>--with-system-libunwind</samp>, then you must use libunwind 0.98 or
627 1.1 mrg later.
628 1.6 mrg </p>
629 1.6 mrg <p>None of the following versions of GCC has an ABI that is compatible
630 1.1 mrg with any of the other versions in this list, with the exception that
631 1.1 mrg Red Hat 2.96 and Trillian 000171 are compatible with each other:
632 1.6 mrg 3.1, 3.0.2, 3.0.1, 3.0, Red Hat 2.96, and Trillian 000717.
633 1.6 mrg This primarily affects C++ programs and programs that create shared libraries.
634 1.6 mrg GCC 3.1 or later is recommended for compiling linux, the kernel.
635 1.1 mrg As of version 3.1 GCC is believed to be fully ABI compliant, and hence no
636 1.1 mrg more major ABI changes are expected.
637 1.6 mrg </p>
638 1.6 mrg <hr />
639 1.6 mrg <a name="ia64_002dx_002dhpux"></a><a name="ia64_002d_002a_002dhpux_002a"></a>
640 1.6 mrg <h3 class="heading">ia64-*-hpux*</h3>
641 1.1 mrg <p>Building GCC on this target requires the GNU Assembler. The bundled HP
642 1.1 mrg assembler will not work. To prevent GCC from using the wrong assembler,
643 1.6 mrg the option <samp>--with-gnu-as</samp> may be necessary.
644 1.6 mrg </p>
645 1.6 mrg <p>The GCC libunwind library has not been ported to HPUX. This means that for
646 1.6 mrg GCC versions 3.2.3 and earlier, <samp>--enable-libunwind-exceptions</samp>
647 1.6 mrg is required to build GCC. For GCC 3.3 and later, this is the default.
648 1.6 mrg For gcc 3.4.3 and later, <samp>--enable-libunwind-exceptions</samp> is
649 1.1 mrg removed and the system libunwind library will always be used.
650 1.6 mrg </p>
651 1.6 mrg <hr />
652 1.6 mrg <!-- rs6000-ibm-aix*, powerpc-ibm-aix* -->
653 1.6 mrg <a name="x_002dibm_002daix"></a><a name="g_t_002a_002dibm_002daix_002a"></a>
654 1.6 mrg <h3 class="heading">*-ibm-aix*</h3>
655 1.6 mrg <p>Support for AIX version 3 and older was discontinued in GCC 3.4.
656 1.1 mrg Support for AIX version 4.2 and older was discontinued in GCC 4.5.
657 1.6 mrg </p>
658 1.6 mrg <p>“out of memory” bootstrap failures may indicate a problem with
659 1.1 mrg process resource limits (ulimit). Hard limits are configured in the
660 1.6 mrg <samp>/etc/security/limits</samp> system configuration file.
661 1.6 mrg </p>
662 1.6 mrg <p>GCC can bootstrap with recent versions of IBM XLC, but bootstrapping
663 1.1 mrg with an earlier release of GCC is recommended. Bootstrapping with XLC
664 1.1 mrg requires a larger data segment, which can be enabled through the
665 1.1 mrg <var>LDR_CNTRL</var> environment variable, e.g.,
666 1.6 mrg </p>
667 1.6 mrg <div class="smallexample">
668 1.6 mrg <pre class="smallexample">% LDR_CNTRL=MAXDATA=0x50000000
669 1.6 mrg % export LDR_CNTRL
670 1.6 mrg </pre></div>
671 1.1 mrg
672 1.6 mrg <p>One can start with a pre-compiled version of GCC to build from
673 1.6 mrg sources. One may delete GCC’s “fixed” header files when starting
674 1.1 mrg with a version of GCC built for an earlier release of AIX.
675 1.6 mrg </p>
676 1.6 mrg <p>To speed up the configuration phases of bootstrapping and installing GCC,
677 1.6 mrg one may use GNU Bash instead of AIX <code>/bin/sh</code>, e.g.,
678 1.6 mrg </p>
679 1.6 mrg <div class="smallexample">
680 1.6 mrg <pre class="smallexample">% CONFIG_SHELL=/opt/freeware/bin/bash
681 1.6 mrg % export CONFIG_SHELL
682 1.6 mrg </pre></div>
683 1.1 mrg
684 1.6 mrg <p>and then proceed as described in <a href="build.html">the build
685 1.6 mrg instructions</a>, where we strongly recommend specifying an absolute path
686 1.1 mrg to invoke <var>srcdir</var>/configure.
687 1.6 mrg </p>
688 1.6 mrg <p>Because GCC on AIX is built as a 32-bit executable by default,
689 1.1 mrg (although it can generate 64-bit programs) the GMP and MPFR libraries
690 1.1 mrg required by gfortran must be 32-bit libraries. Building GMP and MPFR
691 1.1 mrg as static archive libraries works better than shared libraries.
692 1.6 mrg </p>
693 1.6 mrg <p>Errors involving <code>alloca</code> when building GCC generally are due
694 1.1 mrg to an incorrect definition of <code>CC</code> in the Makefile or mixing files
695 1.1 mrg compiled with the native C compiler and GCC. During the stage1 phase of
696 1.6 mrg the build, the native AIX compiler <strong>must</strong> be invoked as <code>cc</code>
697 1.6 mrg (not <code>xlc</code>). Once <code>configure</code> has been informed of
698 1.6 mrg <code>xlc</code>, one needs to use ‘<samp>make distclean</samp>’ to remove the
699 1.6 mrg configure cache files and ensure that <code>CC</code> environment variable
700 1.6 mrg does not provide a definition that will confuse <code>configure</code>.
701 1.1 mrg If this error occurs during stage2 or later, then the problem most likely
702 1.1 mrg is the version of Make (see above).
703 1.6 mrg </p>
704 1.6 mrg <p>The native <code>as</code> and <code>ld</code> are recommended for
705 1.3 skrll bootstrapping on AIX. The GNU Assembler, GNU Linker, and GNU
706 1.3 skrll Binutils version 2.20 is the minimum level that supports bootstrap on
707 1.6 mrg AIX 5. The GNU Assembler has not been updated to support AIX 6 or
708 1.3 skrll AIX 7. The native AIX tools do interoperate with GCC.
709 1.6 mrg </p>
710 1.6 mrg <p>AIX 5.3 TL10, AIX 6.1 TL05 and AIX 7.1 TL00 introduced an AIX
711 1.3 skrll assembler change that sometimes produces corrupt assembly files
712 1.3 skrll causing AIX linker errors. The bug breaks GCC bootstrap on AIX and
713 1.3 skrll can cause compilation failures with existing GCC installations. An
714 1.3 skrll AIX iFix for AIX 5.3 is available (APAR IZ98385 for AIX 5.3 TL10, APAR
715 1.3 skrll IZ98477 for AIX 5.3 TL11 and IZ98134 for AIX 5.3 TL12). AIX 5.3 TL11 SP8,
716 1.3 skrll AIX 5.3 TL12 SP5, AIX 6.1 TL04 SP11, AIX 6.1 TL05 SP7, AIX 6.1 TL06 SP6,
717 1.3 skrll AIX 6.1 TL07 and AIX 7.1 TL01 should include the fix.
718 1.6 mrg </p>
719 1.6 mrg <p>Building <samp>libstdc++.a</samp> requires a fix for an AIX Assembler bug
720 1.1 mrg APAR IY26685 (AIX 4.3) or APAR IY25528 (AIX 5.1). It also requires a
721 1.1 mrg fix for another AIX Assembler bug and a co-dependent AIX Archiver fix
722 1.1 mrg referenced as APAR IY53606 (AIX 5.2) or as APAR IY54774 (AIX 5.1)
723 1.6 mrg </p>
724 1.6 mrg <a name="TransferAixShobj"></a><p>‘<samp>libstdc++</samp>’ in GCC 3.4 increments the major version number of the
725 1.6 mrg shared object and GCC installation places the <samp>libstdc++.a</samp>
726 1.1 mrg shared library in a common location which will overwrite the and GCC
727 1.1 mrg 3.3 version of the shared library. Applications either need to be
728 1.1 mrg re-linked against the new shared library or the GCC 3.1 and GCC 3.3
729 1.6 mrg versions of the ‘<samp>libstdc++</samp>’ shared object needs to be available
730 1.6 mrg to the AIX runtime loader. The GCC 3.1 ‘<samp>libstdc++.so.4</samp>’, if
731 1.6 mrg present, and GCC 3.3 ‘<samp>libstdc++.so.5</samp>’ shared objects can be
732 1.1 mrg installed for runtime dynamic loading using the following steps to set
733 1.6 mrg the ‘<samp>F_LOADONLY</samp>’ flag in the shared object for <em>each</em>
734 1.6 mrg multilib <samp>libstdc++.a</samp> installed:
735 1.6 mrg </p>
736 1.6 mrg <p>Extract the shared objects from the currently installed
737 1.6 mrg <samp>libstdc++.a</samp> archive:
738 1.6 mrg </p><div class="smallexample">
739 1.6 mrg <pre class="smallexample">% ar -x libstdc++.a libstdc++.so.4 libstdc++.so.5
740 1.6 mrg </pre></div>
741 1.1 mrg
742 1.6 mrg <p>Enable the ‘<samp>F_LOADONLY</samp>’ flag so that the shared object will be
743 1.1 mrg available for runtime dynamic loading, but not linking:
744 1.6 mrg </p><div class="smallexample">
745 1.6 mrg <pre class="smallexample">% strip -e libstdc++.so.4 libstdc++.so.5
746 1.6 mrg </pre></div>
747 1.6 mrg
748 1.6 mrg <p>Archive the runtime-only shared object in the GCC 3.4
749 1.6 mrg <samp>libstdc++.a</samp> archive:
750 1.6 mrg </p><div class="smallexample">
751 1.6 mrg <pre class="smallexample">% ar -q libstdc++.a libstdc++.so.4 libstdc++.so.5
752 1.6 mrg </pre></div>
753 1.6 mrg
754 1.6 mrg <p>Eventually, the
755 1.6 mrg <a href="./configure.html#WithAixSoname"><samp>--with-aix-soname=svr4</samp></a>
756 1.5 mrg configure option may drop the need for this procedure for libraries that
757 1.5 mrg support it.
758 1.6 mrg </p>
759 1.6 mrg <p>Linking executables and shared libraries may produce warnings of
760 1.1 mrg duplicate symbols. The assembly files generated by GCC for AIX always
761 1.1 mrg have included multiple symbol definitions for certain global variable
762 1.1 mrg and function declarations in the original program. The warnings should
763 1.1 mrg not prevent the linker from producing a correct library or runnable
764 1.1 mrg executable.
765 1.6 mrg </p>
766 1.6 mrg <p>AIX 4.3 utilizes a “large format” archive to support both 32-bit and
767 1.1 mrg 64-bit object modules. The routines provided in AIX 4.3.0 and AIX 4.3.1
768 1.6 mrg to parse archive libraries did not handle the new format correctly.
769 1.1 mrg These routines are used by GCC and result in error messages during
770 1.1 mrg linking such as “not a COFF file”. The version of the routines shipped
771 1.6 mrg with AIX 4.3.1 should work for a 32-bit environment. The <samp>-g</samp>
772 1.1 mrg option of the archive command may be used to create archives of 32-bit
773 1.1 mrg objects using the original “small format”. A correct version of the
774 1.1 mrg routines is shipped with AIX 4.3.2 and above.
775 1.6 mrg </p>
776 1.6 mrg <p>Some versions of the AIX binder (linker) can fail with a relocation
777 1.6 mrg overflow severe error when the <samp>-bbigtoc</samp> option is used to link
778 1.1 mrg GCC-produced object files into an executable that overflows the TOC. A fix
779 1.1 mrg for APAR IX75823 (OVERFLOW DURING LINK WHEN USING GCC AND -BBIGTOC) is
780 1.1 mrg available from IBM Customer Support and from its
781 1.1 mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
782 1.1 mrg website as PTF U455193.
783 1.6 mrg </p>
784 1.6 mrg <p>The AIX 4.3.2.1 linker (bos.rte.bind_cmds Level 4.3.2.1) will dump core
785 1.1 mrg with a segmentation fault when invoked by any version of GCC. A fix for
786 1.1 mrg APAR IX87327 is available from IBM Customer Support and from its
787 1.1 mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
788 1.1 mrg website as PTF U461879. This fix is incorporated in AIX 4.3.3 and above.
789 1.6 mrg </p>
790 1.6 mrg <p>The initial assembler shipped with AIX 4.3.0 generates incorrect object
791 1.1 mrg files. A fix for APAR IX74254 (64BIT DISASSEMBLED OUTPUT FROM COMPILER FAILS
792 1.1 mrg TO ASSEMBLE/BIND) is available from IBM Customer Support and from its
793 1.1 mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
794 1.1 mrg website as PTF U453956. This fix is incorporated in AIX 4.3.1 and above.
795 1.6 mrg </p>
796 1.6 mrg <p>AIX provides National Language Support (NLS). Compilers and assemblers
797 1.1 mrg use NLS to support locale-specific representations of various data
798 1.6 mrg formats including floating-point numbers (e.g., ‘<samp>.</samp>’ vs ‘<samp>,</samp>’ for
799 1.1 mrg separating decimal fractions). There have been problems reported where
800 1.1 mrg GCC does not produce the same floating-point formats that the assembler
801 1.6 mrg expects. If one encounters this problem, set the <code>LANG</code>
802 1.6 mrg environment variable to ‘<samp>C</samp>’ or ‘<samp>En_US</samp>’.
803 1.6 mrg </p>
804 1.6 mrg <p>A default can be specified with the <samp>-mcpu=<var>cpu_type</var></samp>
805 1.6 mrg switch and using the configure option <samp>--with-cpu-<var>cpu_type</var></samp>.
806 1.6 mrg </p>
807 1.6 mrg <hr />
808 1.6 mrg <a name="iq2000_002dx_002delf"></a><a name="iq2000_002d_002a_002delf"></a>
809 1.6 mrg <h3 class="heading">iq2000-*-elf</h3>
810 1.1 mrg <p>Vitesse IQ2000 processors. These are used in embedded
811 1.1 mrg applications. There are no standard Unix configurations.
812 1.6 mrg </p>
813 1.6 mrg <hr />
814 1.6 mrg <a name="lm32_002dx_002delf"></a><a name="lm32_002d_002a_002delf"></a>
815 1.6 mrg <h3 class="heading">lm32-*-elf</h3>
816 1.6 mrg <p>Lattice Mico32 processor.
817 1.1 mrg This configuration is intended for embedded systems.
818 1.6 mrg </p>
819 1.6 mrg <hr />
820 1.6 mrg <a name="lm32_002dx_002duclinux"></a><a name="lm32_002d_002a_002duclinux"></a>
821 1.6 mrg <h3 class="heading">lm32-*-uclinux</h3>
822 1.6 mrg <p>Lattice Mico32 processor.
823 1.1 mrg This configuration is intended for embedded systems running uClinux.
824 1.6 mrg </p>
825 1.6 mrg <hr />
826 1.6 mrg <a name="m32c_002dx_002delf"></a><a name="m32c_002d_002a_002delf"></a>
827 1.6 mrg <h3 class="heading">m32c-*-elf</h3>
828 1.6 mrg <p>Renesas M32C processor.
829 1.1 mrg This configuration is intended for embedded systems.
830 1.6 mrg </p>
831 1.6 mrg <hr />
832 1.6 mrg <a name="m32r_002dx_002delf"></a><a name="m32r_002d_002a_002delf"></a>
833 1.6 mrg <h3 class="heading">m32r-*-elf</h3>
834 1.6 mrg <p>Renesas M32R processor.
835 1.1 mrg This configuration is intended for embedded systems.
836 1.6 mrg </p>
837 1.6 mrg <hr />
838 1.6 mrg <a name="m68k_002dx_002dx"></a><a name="m68k_002d_002a_002d_002a"></a>
839 1.6 mrg <h3 class="heading">m68k-*-*</h3>
840 1.1 mrg <p>By default,
841 1.6 mrg ‘<samp>m68k-*-elf*</samp>’, ‘<samp>m68k-*-rtems</samp>’, ‘<samp>m68k-*-uclinux</samp>’ and
842 1.6 mrg ‘<samp>m68k-*-linux</samp>’
843 1.1 mrg build libraries for both M680x0 and ColdFire processors. If you only
844 1.1 mrg need the M680x0 libraries, you can omit the ColdFire ones by passing
845 1.6 mrg <samp>--with-arch=m68k</samp> to <code>configure</code>. Alternatively, you
846 1.6 mrg can omit the M680x0 libraries by passing <samp>--with-arch=cf</samp> to
847 1.6 mrg <code>configure</code>. These targets default to 5206 or 5475 code as
848 1.1 mrg appropriate for the target system when
849 1.6 mrg configured with <samp>--with-arch=cf</samp> and 68020 code otherwise.
850 1.6 mrg </p>
851 1.6 mrg <p>The ‘<samp>m68k-*-netbsd</samp>’ and
852 1.6 mrg ‘<samp>m68k-*-openbsd</samp>’ targets also support the <samp>--with-arch</samp>
853 1.1 mrg option. They will generate ColdFire CFV4e code when configured with
854 1.6 mrg <samp>--with-arch=cf</samp> and 68020 code otherwise.
855 1.6 mrg </p>
856 1.6 mrg <p>You can override the default processors listed above by configuring
857 1.6 mrg with <samp>--with-cpu=<var>target</var></samp>. This <var>target</var> can either
858 1.6 mrg be a <samp>-mcpu</samp> argument or one of the following values:
859 1.6 mrg ‘<samp>m68000</samp>’, ‘<samp>m68010</samp>’, ‘<samp>m68020</samp>’, ‘<samp>m68030</samp>’,
860 1.6 mrg ‘<samp>m68040</samp>’, ‘<samp>m68060</samp>’, ‘<samp>m68020-40</samp>’ and ‘<samp>m68020-60</samp>’.
861 1.6 mrg </p>
862 1.6 mrg <p>GCC requires at least binutils version 2.17 on these targets.
863 1.6 mrg </p>
864 1.6 mrg <hr />
865 1.6 mrg <a name="m68k_002dx_002duclinux"></a><a name="m68k_002d_002a_002duclinux"></a>
866 1.6 mrg <h3 class="heading">m68k-*-uclinux</h3>
867 1.1 mrg <p>GCC 4.3 changed the uClinux configuration so that it uses the
868 1.6 mrg ‘<samp>m68k-linux-gnu</samp>’ ABI rather than the ‘<samp>m68k-elf</samp>’ ABI.
869 1.1 mrg It also added improved support for C++ and flat shared libraries,
870 1.3 skrll both of which were ABI changes.
871 1.6 mrg </p>
872 1.6 mrg <hr />
873 1.6 mrg <a name="mep_002dx_002delf"></a><a name="mep_002d_002a_002delf"></a>
874 1.6 mrg <h3 class="heading">mep-*-elf</h3>
875 1.6 mrg <p>Toshiba Media embedded Processor.
876 1.1 mrg This configuration is intended for embedded systems.
877 1.6 mrg </p>
878 1.6 mrg <hr />
879 1.6 mrg <a name="microblaze_002dx_002delf"></a><a name="microblaze_002d_002a_002delf"></a>
880 1.6 mrg <h3 class="heading">microblaze-*-elf</h3>
881 1.6 mrg <p>Xilinx MicroBlaze processor.
882 1.3 skrll This configuration is intended for embedded systems.
883 1.6 mrg </p>
884 1.6 mrg <hr />
885 1.6 mrg <a name="mips_002dx_002dx"></a><a name="mips_002d_002a_002d_002a"></a>
886 1.6 mrg <h3 class="heading">mips-*-*</h3>
887 1.1 mrg <p>If on a MIPS system you get an error message saying “does not have gp
888 1.6 mrg sections for all it’s [sic] sectons [sic]”, don’t worry about it. This
889 1.1 mrg happens whenever you use GAS with the MIPS linker, but there is not
890 1.1 mrg really anything wrong, and it is okay to use the output file. You can
891 1.1 mrg stop such warnings by installing the GNU linker.
892 1.6 mrg </p>
893 1.6 mrg <p>It would be nice to extend GAS to produce the gp tables, but they are
894 1.1 mrg optional, and there should not be a warning about their absence.
895 1.6 mrg </p>
896 1.6 mrg <p>The libstdc++ atomic locking routines for MIPS targets requires MIPS II
897 1.1 mrg and later. A patch went in just after the GCC 3.3 release to
898 1.6 mrg make ‘<samp>mips*-*-*</samp>’ use the generic implementation instead. You can also
899 1.6 mrg configure for ‘<samp>mipsel-elf</samp>’ as a workaround. The
900 1.6 mrg ‘<samp>mips*-*-linux*</samp>’ target continues to use the MIPS II routines. More
901 1.1 mrg work on this is expected in future releases.
902 1.6 mrg </p>
903 1.1 mrg
904 1.6 mrg <p>The built-in <code>__sync_*</code> functions are available on MIPS II and
905 1.6 mrg later systems and others that support the ‘<samp>ll</samp>’, ‘<samp>sc</samp>’ and
906 1.6 mrg ‘<samp>sync</samp>’ instructions. This can be overridden by passing
907 1.6 mrg <samp>--with-llsc</samp> or <samp>--without-llsc</samp> when configuring GCC.
908 1.1 mrg Since the Linux kernel emulates these instructions if they are
909 1.6 mrg missing, the default for ‘<samp>mips*-*-linux*</samp>’ targets is
910 1.6 mrg <samp>--with-llsc</samp>. The <samp>--with-llsc</samp> and
911 1.6 mrg <samp>--without-llsc</samp> configure options may be overridden at compile
912 1.6 mrg time by passing the <samp>-mllsc</samp> or <samp>-mno-llsc</samp> options to
913 1.1 mrg the compiler.
914 1.6 mrg </p>
915 1.6 mrg <p>MIPS systems check for division by zero (unless
916 1.6 mrg <samp>-mno-check-zero-division</samp> is passed to the compiler) by
917 1.1 mrg generating either a conditional trap or a break instruction. Using
918 1.1 mrg trap results in smaller code, but is only supported on MIPS II and
919 1.1 mrg later. Also, some versions of the Linux kernel have a bug that
920 1.1 mrg prevents trap from generating the proper signal (<code>SIGFPE</code>). To enable
921 1.6 mrg the use of break, use the <samp>--with-divide=breaks</samp>
922 1.6 mrg <code>configure</code> option when configuring GCC. The default is to
923 1.1 mrg use traps on systems that support them.
924 1.6 mrg </p>
925 1.6 mrg <p>The assembler from GNU binutils 2.17 and earlier has a bug in the way
926 1.1 mrg it sorts relocations for REL targets (o32, o64, EABI). This can cause
927 1.1 mrg bad code to be generated for simple C++ programs. Also the linker
928 1.1 mrg from GNU binutils versions prior to 2.17 has a bug which causes the
929 1.6 mrg runtime linker stubs in very large programs, like <samp>libgcj.so</samp>, to
930 1.1 mrg be incorrectly generated. GNU Binutils 2.18 and later (and snapshots
931 1.1 mrg made after Nov. 9, 2006) should be free from both of these problems.
932 1.6 mrg </p>
933 1.6 mrg <hr />
934 1.6 mrg <a name="mips_002dsgi_002dirix5"></a><a name="mips_002dsgi_002dirix5-1"></a>
935 1.6 mrg <h3 class="heading">mips-sgi-irix5</h3>
936 1.3 skrll <p>Support for IRIX 5 has been removed in GCC 4.6.
937 1.6 mrg </p>
938 1.6 mrg <hr />
939 1.6 mrg <a name="mips_002dsgi_002dirix6"></a><a name="mips_002dsgi_002dirix6-1"></a>
940 1.6 mrg <h3 class="heading">mips-sgi-irix6</h3>
941 1.3 skrll <p>Support for IRIX 6.5 has been removed in GCC 4.8. Support for IRIX 6
942 1.3 skrll releases before 6.5 has been removed in GCC 4.6, as well as support for
943 1.3 skrll the O32 ABI.
944 1.6 mrg </p>
945 1.6 mrg <hr />
946 1.6 mrg <a name="moxie_002dx_002delf"></a><a name="moxie_002d_002a_002delf"></a>
947 1.6 mrg <h3 class="heading">moxie-*-elf</h3>
948 1.3 skrll <p>The moxie processor.
949 1.6 mrg </p>
950 1.6 mrg <hr />
951 1.6 mrg <a name="msp430_002dx_002delf"></a><a name="msp430_002d_002a_002delf"></a>
952 1.6 mrg <h3 class="heading">msp430-*-elf</h3>
953 1.6 mrg <p>TI MSP430 processor.
954 1.5 mrg This configuration is intended for embedded systems.
955 1.6 mrg </p>
956 1.6 mrg <hr />
957 1.6 mrg <a name="nds32le_002dx_002delf"></a><a name="nds32le_002d_002a_002delf"></a>
958 1.6 mrg <h3 class="heading">nds32le-*-elf</h3>
959 1.5 mrg <p>Andes NDS32 target in little endian mode.
960 1.6 mrg </p>
961 1.6 mrg <hr />
962 1.6 mrg <a name="nds32be_002dx_002delf"></a><a name="nds32be_002d_002a_002delf"></a>
963 1.6 mrg <h3 class="heading">nds32be-*-elf</h3>
964 1.5 mrg <p>Andes NDS32 target in big endian mode.
965 1.6 mrg </p>
966 1.6 mrg <hr />
967 1.6 mrg <a name="nvptx_002dx_002dnone"></a><a name="nvptx_002d_002a_002dnone"></a>
968 1.6 mrg <h3 class="heading">nvptx-*-none</h3>
969 1.5 mrg <p>Nvidia PTX target.
970 1.6 mrg </p>
971 1.6 mrg <p>Instead of GNU binutils, you will need to install
972 1.6 mrg <a href="https://github.com/MentorEmbedded/nvptx-tools/">nvptx-tools</a>.
973 1.5 mrg Tell GCC where to find it:
974 1.6 mrg <samp>--with-build-time-tools=[install-nvptx-tools]/nvptx-none/bin</samp>.
975 1.6 mrg </p>
976 1.6 mrg <p>A nvptx port of newlib is available at
977 1.6 mrg <a href="https://github.com/MentorEmbedded/nvptx-newlib/">nvptx-newlib</a>.
978 1.5 mrg It can be automatically built together with GCC. For this, add a
979 1.6 mrg symbolic link to nvptx-newlib’s <samp>newlib</samp> directory to the
980 1.5 mrg directory containing the GCC sources.
981 1.6 mrg </p>
982 1.6 mrg <p>Use the <samp>--disable-sjlj-exceptions</samp> and
983 1.6 mrg <samp>--enable-newlib-io-long-long</samp> options when configuring.
984 1.6 mrg </p>
985 1.6 mrg <hr />
986 1.6 mrg <a name="powerpc_002dx_002dx"></a><a name="powerpc_002d_002a_002d_002a"></a>
987 1.6 mrg <h3 class="heading">powerpc-*-*</h3>
988 1.6 mrg <p>You can specify a default version for the <samp>-mcpu=<var>cpu_type</var></samp>
989 1.6 mrg switch by using the configure option <samp>--with-cpu-<var>cpu_type</var></samp>.
990 1.6 mrg </p>
991 1.6 mrg <p>You will need
992 1.1 mrg <a href="ftp://ftp.kernel.org/pub/linux/devel/binutils">binutils 2.15</a>
993 1.1 mrg or newer for a working GCC.
994 1.6 mrg </p>
995 1.6 mrg <hr />
996 1.6 mrg <a name="powerpc_002dx_002ddarwin"></a><a name="powerpc_002d_002a_002ddarwin_002a"></a>
997 1.6 mrg <h3 class="heading">powerpc-*-darwin*</h3>
998 1.1 mrg <p>PowerPC running Darwin (Mac OS X kernel).
999 1.6 mrg </p>
1000 1.6 mrg <p>Pre-installed versions of Mac OS X may not include any developer tools,
1001 1.1 mrg meaning that you will not be able to build GCC from source. Tool
1002 1.1 mrg binaries are available at
1003 1.3 skrll <a href="http://opensource.apple.com/">http://opensource.apple.com/</a>.
1004 1.6 mrg </p>
1005 1.6 mrg <p>This version of GCC requires at least cctools-590.36. The
1006 1.1 mrg cctools-590.36 package referenced from
1007 1.1 mrg <a href="http://gcc.gnu.org/ml/gcc/2006-03/msg00507.html">http://gcc.gnu.org/ml/gcc/2006-03/msg00507.html</a> will not work
1008 1.1 mrg on systems older than 10.3.9 (aka darwin7.9.0).
1009 1.6 mrg </p>
1010 1.6 mrg <hr />
1011 1.6 mrg <a name="powerpc_002dx_002delf"></a><a name="powerpc_002d_002a_002delf"></a>
1012 1.6 mrg <h3 class="heading">powerpc-*-elf</h3>
1013 1.1 mrg <p>PowerPC system in big endian mode, running System V.4.
1014 1.6 mrg </p>
1015 1.6 mrg <hr />
1016 1.6 mrg <a name="powerpc_002dx_002dlinux_002dgnu"></a><a name="powerpc_002a_002d_002a_002dlinux_002dgnu_002a"></a>
1017 1.6 mrg <h3 class="heading">powerpc*-*-linux-gnu*</h3>
1018 1.1 mrg <p>PowerPC system in big endian mode running Linux.
1019 1.6 mrg </p>
1020 1.6 mrg <hr />
1021 1.6 mrg <a name="powerpc_002dx_002dnetbsd"></a><a name="powerpc_002d_002a_002dnetbsd_002a"></a>
1022 1.6 mrg <h3 class="heading">powerpc-*-netbsd*</h3>
1023 1.1 mrg <p>PowerPC system in big endian mode running NetBSD.
1024 1.6 mrg </p>
1025 1.6 mrg <hr />
1026 1.6 mrg <a name="powerpc_002dx_002deabisim"></a><a name="powerpc_002d_002a_002deabisim"></a>
1027 1.6 mrg <h3 class="heading">powerpc-*-eabisim</h3>
1028 1.1 mrg <p>Embedded PowerPC system in big endian mode for use in running under the
1029 1.1 mrg PSIM simulator.
1030 1.6 mrg </p>
1031 1.6 mrg <hr />
1032 1.6 mrg <a name="powerpc_002dx_002deabi"></a><a name="powerpc_002d_002a_002deabi"></a>
1033 1.6 mrg <h3 class="heading">powerpc-*-eabi</h3>
1034 1.1 mrg <p>Embedded PowerPC system in big endian mode.
1035 1.6 mrg </p>
1036 1.6 mrg <hr />
1037 1.6 mrg <a name="powerpcle_002dx_002delf"></a><a name="powerpcle_002d_002a_002delf"></a>
1038 1.6 mrg <h3 class="heading">powerpcle-*-elf</h3>
1039 1.1 mrg <p>PowerPC system in little endian mode, running System V.4.
1040 1.6 mrg </p>
1041 1.6 mrg <hr />
1042 1.6 mrg <a name="powerpcle_002dx_002deabisim"></a><a name="powerpcle_002d_002a_002deabisim"></a>
1043 1.6 mrg <h3 class="heading">powerpcle-*-eabisim</h3>
1044 1.1 mrg <p>Embedded PowerPC system in little endian mode for use in running under
1045 1.1 mrg the PSIM simulator.
1046 1.6 mrg </p>
1047 1.6 mrg <hr />
1048 1.6 mrg <a name="powerpcle_002dx_002deabi"></a><a name="powerpcle_002d_002a_002deabi"></a>
1049 1.6 mrg <h3 class="heading">powerpcle-*-eabi</h3>
1050 1.1 mrg <p>Embedded PowerPC system in little endian mode.
1051 1.6 mrg </p>
1052 1.6 mrg <hr />
1053 1.6 mrg <a name="rl78_002dx_002delf"></a><a name="rl78_002d_002a_002delf"></a>
1054 1.6 mrg <h3 class="heading">rl78-*-elf</h3>
1055 1.6 mrg <p>The Renesas RL78 processor.
1056 1.3 skrll This configuration is intended for embedded systems.
1057 1.6 mrg </p>
1058 1.6 mrg <hr />
1059 1.6 mrg <a name="rx_002dx_002delf"></a><a name="rx_002d_002a_002delf"></a>
1060 1.6 mrg <h3 class="heading">rx-*-elf</h3>
1061 1.1 mrg <p>The Renesas RX processor. See
1062 1.1 mrg <a href="http://eu.renesas.com/fmwk.jsp?cnt=rx600_series_landing.jsp&fp=/products/mpumcu/rx_family/rx600_series">http://eu.renesas.com/fmwk.jsp?cnt=rx600_series_landing.jsp&fp=/products/mpumcu/rx_family/rx600_series</a>
1063 1.1 mrg for more information about this processor.
1064 1.6 mrg </p>
1065 1.6 mrg <hr />
1066 1.6 mrg <a name="s390_002dx_002dlinux"></a><a name="s390_002d_002a_002dlinux_002a"></a>
1067 1.6 mrg <h3 class="heading">s390-*-linux*</h3>
1068 1.1 mrg <p>S/390 system running GNU/Linux for S/390.
1069 1.6 mrg </p>
1070 1.6 mrg <hr />
1071 1.6 mrg <a name="s390x_002dx_002dlinux"></a><a name="s390x_002d_002a_002dlinux_002a"></a>
1072 1.6 mrg <h3 class="heading">s390x-*-linux*</h3>
1073 1.1 mrg <p>zSeries system (64-bit) running GNU/Linux for zSeries.
1074 1.6 mrg </p>
1075 1.6 mrg <hr />
1076 1.6 mrg <a name="s390x_002dibm_002dtpf"></a><a name="s390x_002dibm_002dtpf_002a"></a>
1077 1.6 mrg <h3 class="heading">s390x-ibm-tpf*</h3>
1078 1.1 mrg <p>zSeries system (64-bit) running TPF. This platform is
1079 1.1 mrg supported as cross-compilation target only.
1080 1.6 mrg </p>
1081 1.6 mrg <hr />
1082 1.6 mrg <a name="x_002dx_002dsolaris2"></a><a name="g_t_002a_002d_002a_002dsolaris2_002a"></a>
1083 1.6 mrg <h3 class="heading">*-*-solaris2*</h3>
1084 1.6 mrg <p>Support for Solaris 9 has been removed in GCC 5. Support for Solaris
1085 1.5 mrg 8 has been removed in GCC 4.8. Support for Solaris 7 has been removed
1086 1.5 mrg in GCC 4.6.
1087 1.6 mrg </p>
1088 1.6 mrg <p>Sun does not ship a C compiler with Solaris 2 before Solaris 10, though
1089 1.3 skrll you can download the Sun Studio compilers for free. In Solaris 10 and
1090 1.6 mrg 11, GCC 3.4.3 is available as <code>/usr/sfw/bin/gcc</code>. Solaris 11
1091 1.6 mrg also provides GCC 4.5.2 as <code>/usr/gcc/4.5/bin/gcc</code>. Alternatively,
1092 1.1 mrg you can install a pre-built GCC to bootstrap and install GCC. See the
1093 1.1 mrg <a href="binaries.html">binaries page</a> for details.
1094 1.6 mrg </p>
1095 1.6 mrg <p>The Solaris 2 <code>/bin/sh</code> will often fail to configure
1096 1.6 mrg ‘<samp>libstdc++-v3</samp>’, ‘<samp>boehm-gc</samp>’ or ‘<samp>libjava</samp>’. We therefore
1097 1.1 mrg recommend using the following initial sequence of commands
1098 1.6 mrg </p>
1099 1.6 mrg <div class="smallexample">
1100 1.6 mrg <pre class="smallexample">% CONFIG_SHELL=/bin/ksh
1101 1.6 mrg % export CONFIG_SHELL
1102 1.6 mrg </pre></div>
1103 1.1 mrg
1104 1.6 mrg <p>and proceed as described in <a href="configure.html">the configure instructions</a>.
1105 1.1 mrg In addition we strongly recommend specifying an absolute path to invoke
1106 1.6 mrg <code><var>srcdir</var>/configure</code>.
1107 1.6 mrg </p>
1108 1.6 mrg <p>Solaris 2 comes with a number of optional OS packages. Some of these
1109 1.1 mrg are needed to use GCC fully, namely <code>SUNWarc</code>,
1110 1.1 mrg <code>SUNWbtool</code>, <code>SUNWesu</code>, <code>SUNWhea</code>, <code>SUNWlibm</code>,
1111 1.1 mrg <code>SUNWsprot</code>, and <code>SUNWtoo</code>. If you did not install all
1112 1.1 mrg optional packages when installing Solaris 2, you will need to verify that
1113 1.1 mrg the packages that GCC needs are installed.
1114 1.6 mrg </p>
1115 1.6 mrg <p>To check whether an optional package is installed, use
1116 1.6 mrg the <code>pkginfo</code> command. To add an optional package, use the
1117 1.6 mrg <code>pkgadd</code> command. For further details, see the Solaris 2
1118 1.1 mrg documentation.
1119 1.6 mrg </p>
1120 1.6 mrg <p>Trying to use the linker and other tools in
1121 1.6 mrg <samp>/usr/ucb</samp> to install GCC has been observed to cause trouble.
1122 1.1 mrg For example, the linker may hang indefinitely. The fix is to remove
1123 1.6 mrg <samp>/usr/ucb</samp> from your <code>PATH</code>.
1124 1.6 mrg </p>
1125 1.6 mrg <p>The build process works more smoothly with the legacy Sun tools so, if you
1126 1.6 mrg have <samp>/usr/xpg4/bin</samp> in your <code>PATH</code>, we recommend that you place
1127 1.6 mrg <samp>/usr/bin</samp> before <samp>/usr/xpg4/bin</samp> for the duration of the build.
1128 1.6 mrg </p>
1129 1.6 mrg <p>We recommend the use of the Sun assembler or the GNU assembler, in
1130 1.6 mrg conjunction with the Sun linker. The GNU <code>as</code>
1131 1.1 mrg versions included in Solaris 10, from GNU binutils 2.15, and Solaris 11,
1132 1.1 mrg from GNU binutils 2.19, are known to work. They can be found in
1133 1.6 mrg <samp>/usr/sfw/bin/gas</samp>. Current versions of GNU binutils (2.22)
1134 1.1 mrg are known to work as well. Note that your mileage may vary
1135 1.1 mrg if you use a combination of the GNU tools and the Sun tools: while the
1136 1.6 mrg combination GNU <code>as</code> + Sun <code>ld</code> should reasonably work,
1137 1.6 mrg the reverse combination Sun <code>as</code> + GNU <code>ld</code> may fail to
1138 1.6 mrg build or cause memory corruption at runtime in some cases for C++ programs.
1139 1.6 mrg GNU <code>ld</code> usually works as well, although the version included in
1140 1.1 mrg Solaris 10 cannot be used due to several bugs. Again, the current
1141 1.3 skrll version (2.22) is known to work, but generally lacks platform specific
1142 1.6 mrg features, so better stay with Sun <code>ld</code>. To use the LTO linker
1143 1.6 mrg plugin (<samp>-fuse-linker-plugin</samp>) with GNU <code>ld</code>, GNU
1144 1.6 mrg binutils <em>must</em> be configured with <samp>--enable-largefile</samp>.
1145 1.6 mrg </p>
1146 1.6 mrg <p>To enable symbol versioning in ‘<samp>libstdc++</samp>’ with the Sun linker,
1147 1.6 mrg you need to have any version of GNU <code>c++filt</code>, which is part of
1148 1.6 mrg GNU binutils. ‘<samp>libstdc++</samp>’ symbol versioning will be disabled if no
1149 1.6 mrg appropriate version is found. Sun <code>c++filt</code> from the Sun Studio
1150 1.3 skrll compilers does <em>not</em> work.
1151 1.6 mrg </p>
1152 1.6 mrg <p>GNU <code>make</code> version 3.81 or later is required to build libjava
1153 1.6 mrg with the Sun linker.
1154 1.6 mrg </p>
1155 1.6 mrg <p>Sun bug 4296832 turns up when compiling X11 headers with GCC 2.95 or
1156 1.6 mrg newer: <code>g++</code> will complain that types are missing. These headers
1157 1.1 mrg assume that omitting the type means <code>int</code>; this assumption worked for
1158 1.1 mrg C90 but is wrong for C++, and is now wrong for C99 also.
1159 1.6 mrg </p>
1160 1.6 mrg <p>Sun bug 4927647 sometimes causes random spurious testsuite failures
1161 1.6 mrg related to missing diagnostic output. This bug doesn’t affect GCC
1162 1.6 mrg itself, rather it is a kernel bug triggered by the <code>expect</code>
1163 1.1 mrg program which is used only by the GCC testsuite driver. When the bug
1164 1.6 mrg causes the <code>expect</code> program to miss anticipated output, extra
1165 1.1 mrg testsuite failures appear.
1166 1.6 mrg </p>
1167 1.6 mrg <hr />
1168 1.6 mrg <a name="sparc_002dx_002dx"></a><a name="sparc_002a_002d_002a_002d_002a"></a>
1169 1.6 mrg <h3 class="heading">sparc*-*-*</h3>
1170 1.3 skrll <p>This section contains general configuration information for all
1171 1.3 skrll SPARC-based platforms. In addition to reading this section, please
1172 1.3 skrll read all other sections that match your target.
1173 1.6 mrg </p>
1174 1.6 mrg <p>Newer versions of the GNU Multiple Precision Library (GMP), the MPFR
1175 1.3 skrll library and the MPC library are known to be miscompiled by earlier
1176 1.3 skrll versions of GCC on these platforms. We therefore recommend the use
1177 1.3 skrll of the exact versions of these libraries listed as minimal versions
1178 1.3 skrll in <a href="prerequisites.html">the prerequisites</a>.
1179 1.6 mrg </p>
1180 1.6 mrg <hr />
1181 1.6 mrg <a name="sparc_002dsun_002dsolaris2"></a><a name="sparc_002dsun_002dsolaris2_002a"></a>
1182 1.6 mrg <h3 class="heading">sparc-sun-solaris2*</h3>
1183 1.1 mrg <p>When GCC is configured to use GNU binutils 2.14 or later, the binaries
1184 1.6 mrg produced are smaller than the ones produced using Sun’s native tools;
1185 1.1 mrg this difference is quite significant for binaries containing debugging
1186 1.1 mrg information.
1187 1.6 mrg </p>
1188 1.6 mrg <p>Starting with Solaris 7, the operating system is capable of executing
1189 1.1 mrg 64-bit SPARC V9 binaries. GCC 3.1 and later properly supports
1190 1.6 mrg this; the <samp>-m64</samp> option enables 64-bit code generation.
1191 1.1 mrg However, if all you want is code tuned for the UltraSPARC CPU, you
1192 1.6 mrg should try the <samp>-mtune=ultrasparc</samp> option instead, which produces
1193 1.1 mrg code that, unlike full 64-bit code, can still run on non-UltraSPARC
1194 1.1 mrg machines.
1195 1.6 mrg </p>
1196 1.6 mrg <p>When configuring on a Solaris 7 or later system that is running a kernel
1197 1.1 mrg that supports only 32-bit binaries, one must configure with
1198 1.6 mrg <samp>--disable-multilib</samp>, since we will not be able to build the
1199 1.1 mrg 64-bit target libraries.
1200 1.6 mrg </p>
1201 1.6 mrg <p>GCC 3.3 and GCC 3.4 trigger code generation bugs in earlier versions of
1202 1.1 mrg the GNU compiler (especially GCC 3.0.x versions), which lead to the
1203 1.1 mrg miscompilation of the stage1 compiler and the subsequent failure of the
1204 1.1 mrg bootstrap process. A workaround is to use GCC 3.2.3 as an intermediary
1205 1.1 mrg stage, i.e. to bootstrap that compiler with the base compiler and then
1206 1.1 mrg use it to bootstrap the final compiler.
1207 1.6 mrg </p>
1208 1.6 mrg <p>GCC 3.4 triggers a code generation bug in versions 5.4 (Sun ONE Studio 7)
1209 1.1 mrg and 5.5 (Sun ONE Studio 8) of the Sun compiler, which causes a bootstrap
1210 1.1 mrg failure in form of a miscompilation of the stage1 compiler by the Sun
1211 1.1 mrg compiler. This is Sun bug 4974440. This is fixed with patch 112760-07.
1212 1.6 mrg </p>
1213 1.6 mrg <p>GCC 3.4 changed the default debugging format from Stabs to DWARF-2 for
1214 1.1 mrg 32-bit code on Solaris 7 and later. If you use the Sun assembler, this
1215 1.1 mrg change apparently runs afoul of Sun bug 4910101 (which is referenced as
1216 1.6 mrg an x86-only problem by Sun, probably because they do not use DWARF-2).
1217 1.1 mrg A symptom of the problem is that you cannot compile C++ programs like
1218 1.6 mrg <code>groff</code> 1.19.1 without getting messages similar to the following:
1219 1.6 mrg </p>
1220 1.6 mrg <div class="smallexample">
1221 1.6 mrg <pre class="smallexample">ld: warning: relocation error: R_SPARC_UA32: …
1222 1.6 mrg external symbolic relocation against non-allocatable section
1223 1.6 mrg .debug_info cannot be processed at runtime: relocation ignored.
1224 1.6 mrg </pre></div>
1225 1.6 mrg
1226 1.6 mrg <p>To work around this problem, compile with <samp>-gstabs+</samp> instead of
1227 1.6 mrg plain <samp>-g</samp>.
1228 1.6 mrg </p>
1229 1.6 mrg <p>When configuring the GNU Multiple Precision Library (GMP), the MPFR
1230 1.3 skrll library or the MPC library on a Solaris 7 or later system, the canonical
1231 1.6 mrg target triplet must be specified as the <code>build</code> parameter on the
1232 1.6 mrg configure line. This target triplet can be obtained by invoking <code>./config.guess</code> in the toplevel source directory of GCC (and
1233 1.3 skrll not that of GMP or MPFR or MPC). For example on a Solaris 9 system:
1234 1.6 mrg </p>
1235 1.6 mrg <div class="smallexample">
1236 1.6 mrg <pre class="smallexample">% ./configure --build=sparc-sun-solaris2.9 --prefix=xxx
1237 1.6 mrg </pre></div>
1238 1.6 mrg
1239 1.6 mrg <hr />
1240 1.6 mrg <a name="sparc_002dsun_002dsolaris210"></a><a name="sparc_002dsun_002dsolaris2_002e10"></a>
1241 1.6 mrg <h3 class="heading">sparc-sun-solaris2.10</h3>
1242 1.1 mrg <p>There is a bug in older versions of the Sun assembler which breaks
1243 1.1 mrg thread-local storage (TLS). A typical error message is
1244 1.6 mrg </p>
1245 1.6 mrg <div class="smallexample">
1246 1.6 mrg <pre class="smallexample">ld: fatal: relocation error: R_SPARC_TLS_LE_HIX22: file /var/tmp//ccamPA1v.o:
1247 1.6 mrg symbol <unknown>: bad symbol type SECT: symbol type must be TLS
1248 1.6 mrg </pre></div>
1249 1.6 mrg
1250 1.6 mrg <p>This bug is fixed in Sun patch 118683-03 or later.
1251 1.6 mrg </p>
1252 1.6 mrg <hr />
1253 1.6 mrg <a name="sparc_002dx_002dlinux"></a><a name="sparc_002d_002a_002dlinux_002a"></a>
1254 1.6 mrg <h3 class="heading">sparc-*-linux*</h3>
1255 1.1 mrg
1256 1.1 mrg <p>GCC versions 3.0 and higher require binutils 2.11.2 and glibc 2.2.4
1257 1.1 mrg or newer on this platform. All earlier binutils and glibc
1258 1.1 mrg releases mishandled unaligned relocations on <code>sparc-*-*</code> targets.
1259 1.6 mrg </p>
1260 1.1 mrg
1261 1.6 mrg <hr />
1262 1.6 mrg <a name="sparc64_002dx_002dsolaris2"></a><a name="sparc64_002d_002a_002dsolaris2_002a"></a>
1263 1.6 mrg <h3 class="heading">sparc64-*-solaris2*</h3>
1264 1.3 skrll <p>When configuring the GNU Multiple Precision Library (GMP), the MPFR
1265 1.3 skrll library or the MPC library, the canonical target triplet must be specified
1266 1.6 mrg as the <code>build</code> parameter on the configure line. For example
1267 1.3 skrll on a Solaris 9 system:
1268 1.6 mrg </p>
1269 1.6 mrg <div class="smallexample">
1270 1.6 mrg <pre class="smallexample">% ./configure --build=sparc64-sun-solaris2.9 --prefix=xxx
1271 1.6 mrg </pre></div>
1272 1.1 mrg
1273 1.6 mrg <p>The following compiler flags must be specified in the configure
1274 1.1 mrg step in order to bootstrap this target with the Sun compiler:
1275 1.6 mrg </p>
1276 1.6 mrg <div class="smallexample">
1277 1.6 mrg <pre class="smallexample">% CC="cc -xarch=v9 -xildoff" <var>srcdir</var>/configure [<var>options</var>] [<var>target</var>]
1278 1.6 mrg </pre></div>
1279 1.6 mrg
1280 1.6 mrg <p><samp>-xarch=v9</samp> specifies the SPARC-V9 architecture to the Sun toolchain
1281 1.6 mrg and <samp>-xildoff</samp> turns off the incremental linker.
1282 1.6 mrg </p>
1283 1.6 mrg <hr />
1284 1.6 mrg <a name="sparcv9_002dx_002dsolaris2"></a><a name="sparcv9_002d_002a_002dsolaris2_002a"></a>
1285 1.6 mrg <h3 class="heading">sparcv9-*-solaris2*</h3>
1286 1.6 mrg <p>This is a synonym for ‘<samp>sparc64-*-solaris2*</samp>’.
1287 1.6 mrg </p>
1288 1.6 mrg <hr />
1289 1.6 mrg <a name="c6x_002dx_002dx"></a><a name="c6x_002d_002a_002d_002a"></a>
1290 1.6 mrg <h3 class="heading">c6x-*-*</h3>
1291 1.3 skrll <p>The C6X family of processors. This port requires binutils-2.22 or newer.
1292 1.6 mrg </p>
1293 1.6 mrg <hr />
1294 1.6 mrg <a name="tilegx_002d_002a_002dlinux"></a><a name="tilegx_002d_002a_002dlinux_002a"></a>
1295 1.6 mrg <h3 class="heading">tilegx-*-linux*</h3>
1296 1.5 mrg <p>The TILE-Gx processor in little endian mode, running GNU/Linux. This
1297 1.5 mrg port requires binutils-2.22 or newer.
1298 1.6 mrg </p>
1299 1.6 mrg <hr />
1300 1.6 mrg <a name="tilegxbe_002d_002a_002dlinux"></a><a name="tilegxbe_002d_002a_002dlinux_002a"></a>
1301 1.6 mrg <h3 class="heading">tilegxbe-*-linux*</h3>
1302 1.5 mrg <p>The TILE-Gx processor in big endian mode, running GNU/Linux. This
1303 1.5 mrg port requires binutils-2.23 or newer.
1304 1.6 mrg </p>
1305 1.6 mrg <hr />
1306 1.6 mrg <a name="tilepro_002d_002a_002dlinux"></a><a name="tilepro_002d_002a_002dlinux_002a"></a>
1307 1.6 mrg <h3 class="heading">tilepro-*-linux*</h3>
1308 1.3 skrll <p>The TILEPro processor running GNU/Linux. This port requires
1309 1.3 skrll binutils-2.22 or newer.
1310 1.6 mrg </p>
1311 1.6 mrg <hr />
1312 1.6 mrg <a name="visium_002dx_002delf"></a><a name="visium_002d_002a_002delf"></a>
1313 1.6 mrg <h3 class="heading">visium-*-elf</h3>
1314 1.6 mrg <p>CDS VISIUMcore processor.
1315 1.5 mrg This configuration is intended for embedded systems.
1316 1.6 mrg </p>
1317 1.6 mrg <hr />
1318 1.6 mrg <a name="x_002dx_002dvxworks"></a><a name="g_t_002a_002d_002a_002dvxworks_002a"></a>
1319 1.6 mrg <h3 class="heading">*-*-vxworks*</h3>
1320 1.1 mrg <p>Support for VxWorks is in flux. At present GCC supports <em>only</em> the
1321 1.6 mrg very recent VxWorks 5.5 (aka Tornado 2.2) release, and only on PowerPC.
1322 1.6 mrg We welcome patches for other architectures supported by VxWorks 5.5.
1323 1.1 mrg Support for VxWorks AE would also be welcome; we believe this is merely
1324 1.1 mrg a matter of writing an appropriate “configlette” (see below). We are
1325 1.1 mrg not interested in supporting older, a.out or COFF-based, versions of
1326 1.1 mrg VxWorks in GCC 3.
1327 1.6 mrg </p>
1328 1.6 mrg <p>VxWorks comes with an older version of GCC installed in
1329 1.6 mrg <samp><var>$WIND_BASE</var>/host</samp>; we recommend you do not overwrite it.
1330 1.6 mrg Choose an installation <var>prefix</var> entirely outside <var>$WIND_BASE</var>.
1331 1.6 mrg Before running <code>configure</code>, create the directories <samp><var>prefix</var></samp>
1332 1.6 mrg and <samp><var>prefix</var>/bin</samp>. Link or copy the appropriate assembler,
1333 1.6 mrg linker, etc. into <samp><var>prefix</var>/bin</samp>, and set your <var>PATH</var> to
1334 1.6 mrg include that directory while running both <code>configure</code> and
1335 1.6 mrg <code>make</code>.
1336 1.6 mrg </p>
1337 1.6 mrg <p>You must give <code>configure</code> the
1338 1.6 mrg <samp>--with-headers=<var>$WIND_BASE</var>/target/h</samp> switch so that it can
1339 1.1 mrg find the VxWorks system headers. Since VxWorks is a cross compilation
1340 1.6 mrg target only, you must also specify <samp>--target=<var>target</var></samp>.
1341 1.6 mrg <code>configure</code> will attempt to create the directory
1342 1.6 mrg <samp><var>prefix</var>/<var>target</var>/sys-include</samp> and copy files into it;
1343 1.6 mrg make sure the user running <code>configure</code> has sufficient privilege
1344 1.1 mrg to do so.
1345 1.6 mrg </p>
1346 1.6 mrg <p>GCC’s exception handling runtime requires a special “configlette”
1347 1.6 mrg module, <samp>contrib/gthr_supp_vxw_5x.c</samp>. Follow the instructions in
1348 1.1 mrg that file to add the module to your kernel build. (Future versions of
1349 1.1 mrg VxWorks will incorporate this module.)
1350 1.6 mrg </p>
1351 1.6 mrg <hr />
1352 1.6 mrg <a name="x86_002d64_002dx_002dx"></a><a name="x86_005f64_002d_002a_002d_002a_002c-amd64_002d_002a_002d_002a"></a>
1353 1.6 mrg <h3 class="heading">x86_64-*-*, amd64-*-*</h3>
1354 1.1 mrg <p>GCC supports the x86-64 architecture implemented by the AMD64 processor
1355 1.6 mrg (amd64-*-* is an alias for x86_64-*-*) on GNU/Linux, FreeBSD and NetBSD.
1356 1.1 mrg On GNU/Linux the default is a bi-arch compiler which is able to generate
1357 1.6 mrg both 64-bit x86-64 and 32-bit x86 code (via the <samp>-m32</samp> switch).
1358 1.6 mrg </p>
1359 1.6 mrg <hr />
1360 1.6 mrg <a name="x86_002d64_002dx_002dsolaris210"></a><a name="x86_005f64_002d_002a_002dsolaris2_002e1_005b0_002d9_005d_002a"></a>
1361 1.6 mrg <h3 class="heading">x86_64-*-solaris2.1[0-9]*</h3>
1362 1.3 skrll <p>GCC also supports the x86-64 architecture implemented by the AMD64
1363 1.6 mrg processor (‘<samp>amd64-*-*</samp>’ is an alias for ‘<samp>x86_64-*-*</samp>’) on
1364 1.3 skrll Solaris 10 or later. Unlike other systems, without special options a
1365 1.3 skrll bi-arch compiler is built which generates 32-bit code by default, but
1366 1.6 mrg can generate 64-bit x86-64 code with the <samp>-m64</samp> switch. Since
1367 1.3 skrll GCC 4.7, there is also configuration that defaults to 64-bit code, but
1368 1.6 mrg can generate 32-bit code with <samp>-m32</samp>. To configure and build
1369 1.6 mrg this way, you have to provide all support libraries like <samp>libgmp</samp>
1370 1.6 mrg as 64-bit code, configure with <samp>--target=x86_64-pc-solaris2.1x</samp>
1371 1.6 mrg and ‘<samp>CC=gcc -m64</samp>’.
1372 1.6 mrg </p>
1373 1.6 mrg <hr />
1374 1.6 mrg <a name="xtensa_002dx_002delf"></a><a name="xtensa_002a_002d_002a_002delf"></a>
1375 1.6 mrg <h3 class="heading">xtensa*-*-elf</h3>
1376 1.1 mrg <p>This target is intended for embedded Xtensa systems using the
1377 1.6 mrg ‘<samp>newlib</samp>’ C library. It uses ELF but does not support shared
1378 1.1 mrg objects. Designed-defined instructions specified via the
1379 1.1 mrg Tensilica Instruction Extension (TIE) language are only supported
1380 1.1 mrg through inline assembly.
1381 1.6 mrg </p>
1382 1.6 mrg <p>The Xtensa configuration information must be specified prior to
1383 1.6 mrg building GCC. The <samp>include/xtensa-config.h</samp> header
1384 1.1 mrg file contains the configuration information. If you created your
1385 1.1 mrg own Xtensa configuration with the Xtensa Processor Generator, the
1386 1.1 mrg downloaded files include a customized copy of this header file,
1387 1.1 mrg which you can use to replace the default header file.
1388 1.6 mrg </p>
1389 1.6 mrg <hr />
1390 1.6 mrg <a name="xtensa_002dx_002dlinux"></a><a name="xtensa_002a_002d_002a_002dlinux_002a"></a>
1391 1.6 mrg <h3 class="heading">xtensa*-*-linux*</h3>
1392 1.1 mrg <p>This target is for Xtensa systems running GNU/Linux. It supports ELF
1393 1.1 mrg shared objects and the GNU C library (glibc). It also generates
1394 1.1 mrg position-independent code (PIC) regardless of whether the
1395 1.6 mrg <samp>-fpic</samp> or <samp>-fPIC</samp> options are used. In other
1396 1.1 mrg respects, this target is the same as the
1397 1.6 mrg <a href="#xtensa*-*-elf">‘<samp>xtensa*-*-elf</samp>’</a> target.
1398 1.6 mrg </p>
1399 1.6 mrg <hr />
1400 1.6 mrg <a name="windows"></a><a name="Microsoft-Windows"></a>
1401 1.6 mrg <h3 class="heading">Microsoft Windows</h3>
1402 1.1 mrg
1403 1.6 mrg <a name="Intel-16_002dbit-versions"></a>
1404 1.6 mrg <h4 class="subheading">Intel 16-bit versions</h4>
1405 1.1 mrg <p>The 16-bit versions of Microsoft Windows, such as Windows 3.1, are not
1406 1.1 mrg supported.
1407 1.6 mrg </p>
1408 1.6 mrg <p>However, the 32-bit port has limited support for Microsoft
1409 1.1 mrg Windows 3.11 in the Win32s environment, as a target only. See below.
1410 1.6 mrg </p>
1411 1.6 mrg <a name="Intel-32_002dbit-versions"></a>
1412 1.6 mrg <h4 class="subheading">Intel 32-bit versions</h4>
1413 1.1 mrg <p>The 32-bit versions of Windows, including Windows 95, Windows NT, Windows
1414 1.1 mrg XP, and Windows Vista, are supported by several different target
1415 1.1 mrg platforms. These targets differ in which Windows subsystem they target
1416 1.1 mrg and which C libraries are used.
1417 1.6 mrg </p>
1418 1.6 mrg <ul>
1419 1.6 mrg <li> Cygwin <a href="#x-x-cygwin">*-*-cygwin</a>: Cygwin provides a user-space
1420 1.6 mrg Linux API emulation layer in the Win32 subsystem.
1421 1.6 mrg </li><li> Interix <a href="#x-x-interix">*-*-interix</a>: The Interix subsystem
1422 1.6 mrg provides native support for POSIX.
1423 1.6 mrg </li><li> MinGW <a href="#x-x-mingw32">*-*-mingw32</a>: MinGW is a native GCC port for
1424 1.6 mrg the Win32 subsystem that provides a subset of POSIX.
1425 1.6 mrg </li><li> MKS i386-pc-mks: NuTCracker from MKS. See
1426 1.6 mrg <a href="http://www.mkssoftware.com/">http://www.mkssoftware.com/</a> for more information.
1427 1.6 mrg </li></ul>
1428 1.1 mrg
1429 1.6 mrg <a name="Intel-64_002dbit-versions"></a>
1430 1.6 mrg <h4 class="subheading">Intel 64-bit versions</h4>
1431 1.1 mrg <p>GCC contains support for x86-64 using the mingw-w64
1432 1.6 mrg runtime library, available from <a href="http://mingw-w64.sourceforge.net/">http://mingw-w64.sourceforge.net/</a>.
1433 1.1 mrg This library should be used with the target triple x86_64-pc-mingw32.
1434 1.6 mrg </p>
1435 1.6 mrg <p>Presently Windows for Itanium is not supported.
1436 1.6 mrg </p>
1437 1.6 mrg <a name="Windows-CE"></a>
1438 1.6 mrg <h4 class="subheading">Windows CE</h4>
1439 1.3 skrll <p>Windows CE is supported as a target only on Hitachi
1440 1.1 mrg SuperH (sh-wince-pe), and MIPS (mips-wince-pe).
1441 1.6 mrg </p>
1442 1.6 mrg <a name="Other-Windows-Platforms"></a>
1443 1.6 mrg <h4 class="subheading">Other Windows Platforms</h4>
1444 1.1 mrg <p>GCC no longer supports Windows NT on the Alpha or PowerPC.
1445 1.6 mrg </p>
1446 1.6 mrg <p>GCC no longer supports the Windows POSIX subsystem. However, it does
1447 1.1 mrg support the Interix subsystem. See above.
1448 1.6 mrg </p>
1449 1.6 mrg <p>Old target names including *-*-winnt and *-*-windowsnt are no longer used.
1450 1.6 mrg </p>
1451 1.6 mrg <p>PW32 (i386-pc-pw32) support was never completed, and the project seems to
1452 1.1 mrg be inactive. See <a href="http://pw32.sourceforge.net/">http://pw32.sourceforge.net/</a> for more information.
1453 1.6 mrg </p>
1454 1.6 mrg <p>UWIN support has been removed due to a lack of maintenance.
1455 1.6 mrg </p>
1456 1.6 mrg <hr />
1457 1.6 mrg <a name="x_002dx_002dcygwin"></a><a name="g_t_002a_002d_002a_002dcygwin"></a>
1458 1.6 mrg <h3 class="heading">*-*-cygwin</h3>
1459 1.1 mrg <p>Ports of GCC are included with the
1460 1.1 mrg <a href="http://www.cygwin.com/">Cygwin environment</a>.
1461 1.6 mrg </p>
1462 1.6 mrg <p>GCC will build under Cygwin without modification; it does not build
1463 1.6 mrg with Microsoft’s C++ compiler and there are no plans to make it do so.
1464 1.6 mrg </p>
1465 1.6 mrg <p>The Cygwin native compiler can be configured to target any 32-bit x86
1466 1.1 mrg cpu architecture desired; the default is i686-pc-cygwin. It should be
1467 1.1 mrg used with as up-to-date a version of binutils as possible; use either
1468 1.1 mrg the latest official GNU binutils release in the Cygwin distribution,
1469 1.1 mrg or version 2.20 or above if building your own.
1470 1.6 mrg </p>
1471 1.6 mrg <hr />
1472 1.6 mrg <a name="x_002dx_002dinterix"></a><a name="g_t_002a_002d_002a_002dinterix"></a>
1473 1.6 mrg <h3 class="heading">*-*-interix</h3>
1474 1.1 mrg <p>The Interix target is used by OpenNT, Interix, Services For UNIX (SFU),
1475 1.1 mrg and Subsystem for UNIX-based Applications (SUA). Applications compiled
1476 1.1 mrg with this target run in the Interix subsystem, which is separate from
1477 1.1 mrg the Win32 subsystem. This target was last known to work in GCC 3.3.
1478 1.6 mrg </p>
1479 1.6 mrg <hr />
1480 1.6 mrg <a name="x_002dx_002dmingw32"></a><a name="g_t_002a_002d_002a_002dmingw32"></a>
1481 1.6 mrg <h3 class="heading">*-*-mingw32</h3>
1482 1.6 mrg <p>GCC will build with and support only MinGW runtime 3.12 and later.
1483 1.1 mrg Earlier versions of headers are incompatible with the new default semantics
1484 1.1 mrg of <code>extern inline</code> in <code>-std=c99</code> and <code>-std=gnu99</code> modes.
1485 1.6 mrg </p>
1486 1.6 mrg <hr />
1487 1.6 mrg <a name="older"></a><a name="Older-systems"></a>
1488 1.6 mrg <h3 class="heading">Older systems</h3>
1489 1.1 mrg <p>GCC contains support files for many older (1980s and early
1490 1.1 mrg 1990s) Unix variants. For the most part, support for these systems
1491 1.1 mrg has not been deliberately removed, but it has not been maintained for
1492 1.1 mrg several years and may suffer from bitrot.
1493 1.6 mrg </p>
1494 1.6 mrg <p>Starting with GCC 3.1, each release has a list of “obsoleted” systems.
1495 1.1 mrg Support for these systems is still present in that release, but
1496 1.6 mrg <code>configure</code> will fail unless the <samp>--enable-obsolete</samp>
1497 1.1 mrg option is given. Unless a maintainer steps forward, support for these
1498 1.1 mrg systems will be removed from the next release of GCC.
1499 1.6 mrg </p>
1500 1.6 mrg <p>Support for old systems as hosts for GCC can cause problems if the
1501 1.1 mrg workarounds for compiler, library and operating system bugs affect the
1502 1.1 mrg cleanliness or maintainability of the rest of GCC. In some cases, to
1503 1.1 mrg bring GCC up on such a system, if still possible with current GCC, may
1504 1.1 mrg require first installing an old version of GCC which did work on that
1505 1.1 mrg system, and using it to compile a more recent GCC, to avoid bugs in the
1506 1.1 mrg vendor compiler. Old releases of GCC 1 and GCC 2 are available in the
1507 1.6 mrg <samp>old-releases</samp> directory on the <a href="../mirrors.html">GCC mirror
1508 1.6 mrg sites</a>. Header bugs may generally be avoided using
1509 1.6 mrg <code>fixincludes</code>, but bugs or deficiencies in libraries and the
1510 1.1 mrg operating system may still cause problems.
1511 1.6 mrg </p>
1512 1.6 mrg <p>Support for older systems as targets for cross-compilation is less
1513 1.1 mrg problematic than support for them as hosts for GCC; if an enthusiast
1514 1.1 mrg wishes to make such a target work again (including resurrecting any of
1515 1.1 mrg the targets that never worked with GCC 2, starting from the last
1516 1.1 mrg version before they were removed), patches
1517 1.1 mrg <a href="../contribute.html">following the usual requirements</a> would be
1518 1.1 mrg likely to be accepted, since they should not affect the support for more
1519 1.1 mrg modern targets.
1520 1.6 mrg </p>
1521 1.6 mrg <p>For some systems, old versions of GNU binutils may also be useful,
1522 1.6 mrg and are available from <samp>pub/binutils/old-releases</samp> on
1523 1.1 mrg <a href="http://sourceware.org/mirrors.html">sourceware.org mirror sites</a>.
1524 1.6 mrg </p>
1525 1.6 mrg <p>Some of the information on specific systems above relates to
1526 1.1 mrg such older systems, but much of the information
1527 1.1 mrg about GCC on such systems (which may no longer be applicable to
1528 1.1 mrg current GCC) is to be found in the GCC texinfo manual.
1529 1.6 mrg </p>
1530 1.6 mrg <hr />
1531 1.6 mrg <a name="elf"></a><a name="all-ELF-targets-_0028SVR4_002c-Solaris-2_002c-etc_002e_0029"></a>
1532 1.6 mrg <h3 class="heading">all ELF targets (SVR4, Solaris 2, etc.)</h3>
1533 1.1 mrg <p>C++ support is significantly better on ELF targets if you use the
1534 1.1 mrg <a href="./configure.html#with-gnu-ld">GNU linker</a>; duplicate copies of
1535 1.1 mrg inlines, vtables and template instantiations will be discarded
1536 1.1 mrg automatically.
1537 1.6 mrg </p>
1538 1.1 mrg
1539 1.6 mrg <hr />
1540 1.6 mrg <p>
1541 1.1 mrg <p><a href="./index.html">Return to the GCC Installation page</a>
1542 1.6 mrg </p>
1543 1.6 mrg
1544 1.6 mrg
1545 1.6 mrg
1546 1.6 mrg
1547 1.1 mrg
1548 1.1 mrg
1549 1.6 mrg </body>
1550 1.6 mrg </html>
1551