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42 1.1 mrg <h1 class="settitle">Host/Target specific installation notes for GCC</h1>
43 1.1 mrg <a name="index-Specific-1"></a><a name="index-Specific-installation-notes-2"></a><a name="index-Target-specific-installation-3"></a><a name="index-Host-specific-installation-4"></a><a name="index-Target-specific-installation-notes-5"></a>
44 1.1 mrg Please read this document carefully <em>before</em> installing the
45 1.1 mrg GNU Compiler Collection on your machine.
46 1.1 mrg
47 1.1 mrg <p>Note that this list of install notes is <em>not</em> a list of supported
48 1.1 mrg hosts or targets. Not all supported hosts and targets are listed
49 1.1 mrg here, only the ones that require host-specific or target-specific
50 1.3 mrg information have to.
51 1.1 mrg
52 1.1 mrg <ul>
53 1.3 mrg <li><a href="#aarch64x-x-x">aarch64*-*-*</a>
54 1.1 mrg <li><a href="#alpha-x-x">alpha*-*-*</a>
55 1.3 mrg <li><a href="#alpha-dec-osf51">alpha*-dec-osf5.1</a>
56 1.3 mrg <li><a href="#amd64-x-solaris210">amd64-*-solaris2.10</a>
57 1.3 mrg <li><a href="#arm-x-eabi">arm-*-eabi</a>
58 1.1 mrg <li><a href="#avr">avr</a>
59 1.1 mrg <li><a href="#bfin">Blackfin</a>
60 1.1 mrg <li><a href="#dos">DOS</a>
61 1.1 mrg <li><a href="#x-x-freebsd">*-*-freebsd*</a>
62 1.1 mrg <li><a href="#h8300-hms">h8300-hms</a>
63 1.1 mrg <li><a href="#hppa-hp-hpux">hppa*-hp-hpux*</a>
64 1.1 mrg <li><a href="#hppa-hp-hpux10">hppa*-hp-hpux10</a>
65 1.1 mrg <li><a href="#hppa-hp-hpux11">hppa*-hp-hpux11</a>
66 1.1 mrg <li><a href="#x-x-linux-gnu">*-*-linux-gnu</a>
67 1.1 mrg <li><a href="#ix86-x-linux">i?86-*-linux*</a>
68 1.3 mrg <li><a href="#ix86-x-solaris289">i?86-*-solaris2.9</a>
69 1.1 mrg <li><a href="#ix86-x-solaris210">i?86-*-solaris2.10</a>
70 1.1 mrg <li><a href="#ia64-x-linux">ia64-*-linux</a>
71 1.1 mrg <li><a href="#ia64-x-hpux">ia64-*-hpux*</a>
72 1.1 mrg <li><a href="#x-ibm-aix">*-ibm-aix*</a>
73 1.1 mrg <li><a href="#iq2000-x-elf">iq2000-*-elf</a>
74 1.1 mrg <li><a href="#lm32-x-elf">lm32-*-elf</a>
75 1.1 mrg <li><a href="#lm32-x-uclinux">lm32-*-uclinux</a>
76 1.1 mrg <li><a href="#m32c-x-elf">m32c-*-elf</a>
77 1.1 mrg <li><a href="#m32r-x-elf">m32r-*-elf</a>
78 1.1 mrg <li><a href="#m68k-x-x">m68k-*-*</a>
79 1.1 mrg <li><a href="#m68k-uclinux">m68k-uclinux</a>
80 1.1 mrg <li><a href="#mep-x-elf">mep-*-elf</a>
81 1.3 mrg <li><a href="#microblaze-x-elf">microblaze-*-elf</a>
82 1.1 mrg <li><a href="#mips-x-x">mips-*-*</a>
83 1.1 mrg <li><a href="#mips-sgi-irix5">mips-sgi-irix5</a>
84 1.1 mrg <li><a href="#mips-sgi-irix6">mips-sgi-irix6</a>
85 1.1 mrg <li><a href="#powerpc-x-x">powerpc*-*-*</a>
86 1.1 mrg <li><a href="#powerpc-x-darwin">powerpc-*-darwin*</a>
87 1.1 mrg <li><a href="#powerpc-x-elf">powerpc-*-elf</a>
88 1.1 mrg <li><a href="#powerpc-x-linux-gnu">powerpc*-*-linux-gnu*</a>
89 1.1 mrg <li><a href="#powerpc-x-netbsd">powerpc-*-netbsd*</a>
90 1.1 mrg <li><a href="#powerpc-x-eabisim">powerpc-*-eabisim</a>
91 1.1 mrg <li><a href="#powerpc-x-eabi">powerpc-*-eabi</a>
92 1.1 mrg <li><a href="#powerpcle-x-elf">powerpcle-*-elf</a>
93 1.1 mrg <li><a href="#powerpcle-x-eabisim">powerpcle-*-eabisim</a>
94 1.1 mrg <li><a href="#powerpcle-x-eabi">powerpcle-*-eabi</a>
95 1.1 mrg <li><a href="#s390-x-linux">s390-*-linux*</a>
96 1.1 mrg <li><a href="#s390x-x-linux">s390x-*-linux*</a>
97 1.1 mrg <li><a href="#s390x-ibm-tpf">s390x-ibm-tpf*</a>
98 1.1 mrg <li><a href="#x-x-solaris2">*-*-solaris2*</a>
99 1.3 mrg <li><a href="#sparc-x-x">sparc*-*-*</a>
100 1.1 mrg <li><a href="#sparc-sun-solaris2">sparc-sun-solaris2*</a>
101 1.1 mrg <li><a href="#sparc-sun-solaris210">sparc-sun-solaris2.10</a>
102 1.1 mrg <li><a href="#sparc-x-linux">sparc-*-linux*</a>
103 1.1 mrg <li><a href="#sparc64-x-solaris2">sparc64-*-solaris2*</a>
104 1.1 mrg <li><a href="#sparcv9-x-solaris2">sparcv9-*-solaris2*</a>
105 1.3 mrg <li><a href="#c6x-x-x">c6x-*-*</a>
106 1.3 mrg <li><a href="#tilegx-x-linux">tilegx-*-linux*</a>
107 1.3 mrg <li><a href="#tilepro-x-linux">tilepro-*-linux*</a>
108 1.1 mrg <li><a href="#x-x-vxworks">*-*-vxworks*</a>
109 1.1 mrg <li><a href="#x86-64-x-x">x86_64-*-*</a> amd64-*-*
110 1.3 mrg <li><a href="#x86-64-x-solaris210">x86_64-*-solaris2.1[0-9]*</a>
111 1.1 mrg <li><a href="#xtensa-x-elf">xtensa*-*-elf</a>
112 1.1 mrg <li><a href="#xtensa-x-linux">xtensa*-*-linux*</a>
113 1.1 mrg <li><a href="#windows">Microsoft Windows</a>
114 1.1 mrg <li><a href="#x-x-cygwin">*-*-cygwin</a>
115 1.1 mrg <li><a href="#x-x-interix">*-*-interix</a>
116 1.1 mrg <li><a href="#x-x-mingw32">*-*-mingw32</a>
117 1.1 mrg <li><a href="#os2">OS/2</a>
118 1.1 mrg <li><a href="#older">Older systems</a>
119 1.1 mrg </ul>
120 1.1 mrg
121 1.1 mrg <ul>
122 1.1 mrg <li><a href="#elf">all ELF targets</a> (SVR4, Solaris 2, etc.)
123 1.1 mrg </ul>
124 1.1 mrg
125 1.1 mrg <p><!-- -------- host/target specific issues start here ---------------- -->
126 1.1 mrg <hr />
127 1.1 mrg
128 1.3 mrg <h3 class="heading"><a name="TOC0"></a><a name="aarch64x_002dx_002dx"></a>aarch64*-*-*</h3>
129 1.3 mrg
130 1.3 mrg <p>To enable a workaround for the Cortex-A53 erratum number 835769 by default
131 1.3 mrg (for all CPUs regardless of -mcpu option given) at configure time use the
132 1.3 mrg <samp><span class="option">--enable-fix-cortex-a53-835769</span></samp> option. This will enable the fix by
133 1.3 mrg default and can be explicitly disabled during during compilation by passing the
134 1.3 mrg <samp><span class="option">-mno-fix-cortex-a53-835769</span></samp> option. Conversely,
135 1.3 mrg <samp><span class="option">--disable-fix-cortex-a53-835769</span></samp> will disable the workaround by
136 1.3 mrg default. The workaround is disabled by default if neither of
137 1.3 mrg <samp><span class="option">--enable-fix-cortex-a53-835769</span></samp> or
138 1.3 mrg <samp><span class="option">--disable-fix-cortex-a53-835769</span></samp> is given at configure time.
139 1.3 mrg
140 1.3 mrg <h3 class="heading"><a name="TOC1"></a><a name="alpha_002dx_002dx"></a>alpha*-*-*</h3>
141 1.1 mrg
142 1.1 mrg <p>This section contains general configuration information for all
143 1.1 mrg alpha-based platforms using ELF (in particular, ignore this section for
144 1.1 mrg DEC OSF/1, Digital UNIX and Tru64 UNIX). In addition to reading this
145 1.1 mrg section, please read all other sections that match your target.
146 1.1 mrg
147 1.1 mrg <p>We require binutils 2.11.2 or newer.
148 1.1 mrg Previous binutils releases had a number of problems with DWARF 2
149 1.1 mrg debugging information, not the least of which is incorrect linking of
150 1.1 mrg shared libraries.
151 1.1 mrg
152 1.1 mrg <p><hr />
153 1.1 mrg
154 1.3 mrg <h3 class="heading"><a name="TOC2"></a><a name="alpha_002ddec_002dosf51"></a>alpha*-dec-osf5.1</h3>
155 1.1 mrg
156 1.1 mrg <p>Systems using processors that implement the DEC Alpha architecture and
157 1.1 mrg are running the DEC/Compaq/HP Unix (DEC OSF/1, Digital UNIX, or Compaq/HP
158 1.1 mrg Tru64 UNIX) operating system, for example the DEC Alpha AXP systems.
159 1.1 mrg
160 1.3 mrg <p>Support for Tru64 UNIX V5.1 has been removed in GCC 4.8. As of GCC 4.6,
161 1.3 mrg support for Tru64 UNIX V4.0 and V5.0 has been removed. As of GCC 3.2,
162 1.3 mrg versions before <code>alpha*-dec-osf4</code> are no longer supported. (These
163 1.3 mrg are the versions which identify themselves as DEC OSF/1.)
164 1.1 mrg
165 1.1 mrg <p><hr />
166 1.1 mrg
167 1.3 mrg <h3 class="heading"><a name="TOC3"></a><a name="amd64_002dx_002dsolaris210"></a>amd64-*-solaris2.1[0-9]*</h3>
168 1.1 mrg
169 1.3 mrg <p>This is a synonym for ‘<samp><span class="samp">x86_64-*-solaris2.1[0-9]*</span></samp>’.
170 1.1 mrg
171 1.1 mrg <p><hr />
172 1.1 mrg
173 1.3 mrg <h3 class="heading"><a name="TOC4"></a><a name="arm_002dx_002deabi"></a>arm-*-eabi</h3>
174 1.1 mrg
175 1.1 mrg <p>ARM-family processors. Subtargets that use the ELF object format
176 1.1 mrg require GNU binutils 2.13 or newer. Such subtargets include:
177 1.3 mrg <code>arm-*-netbsdelf</code>, <code>arm-*-*linux-*</code>
178 1.3 mrg and <code>arm-*-rtemseabi</code>.
179 1.1 mrg
180 1.1 mrg <p><hr />
181 1.1 mrg
182 1.3 mrg <h3 class="heading"><a name="TOC5"></a><a name="avr"></a>avr</h3>
183 1.1 mrg
184 1.1 mrg <p>ATMEL AVR-family micro controllers. These are used in embedded
185 1.1 mrg applications. There are no standard Unix configurations.
186 1.1 mrg See “AVR Options” in the main manual
187 1.1 mrg for the list of supported MCU types.
188 1.1 mrg
189 1.1 mrg <p>Use ‘<samp><span class="samp">configure --target=avr --enable-languages="c"</span></samp>’ to configure GCC.
190 1.1 mrg
191 1.1 mrg <p>Further installation notes and other useful information about AVR tools
192 1.1 mrg can also be obtained from:
193 1.1 mrg
194 1.1 mrg <ul>
195 1.1 mrg <li><a href="http://www.nongnu.org/avr/">http://www.nongnu.org/avr/</a>
196 1.1 mrg <li><a href="http://www.amelek.gda.pl/avr/">http://www.amelek.gda.pl/avr/</a>
197 1.1 mrg </ul>
198 1.1 mrg
199 1.1 mrg <p>We <em>strongly</em> recommend using binutils 2.13 or newer.
200 1.1 mrg
201 1.1 mrg <p>The following error:
202 1.3 mrg <pre class="smallexample"> Error: register required
203 1.1 mrg </pre>
204 1.1 mrg <p>indicates that you should upgrade to a newer version of the binutils.
205 1.1 mrg
206 1.1 mrg <p><hr />
207 1.1 mrg
208 1.3 mrg <h3 class="heading"><a name="TOC6"></a><a name="bfin"></a>Blackfin</h3>
209 1.1 mrg
210 1.1 mrg <p>The Blackfin processor, an Analog Devices DSP.
211 1.1 mrg See “Blackfin Options” in the main manual
212 1.1 mrg
213 1.1 mrg <p>More information, and a version of binutils with support for this processor,
214 1.1 mrg is available at <a href="http://blackfin.uclinux.org">http://blackfin.uclinux.org</a>
215 1.1 mrg
216 1.1 mrg <p><hr />
217 1.1 mrg
218 1.3 mrg <h3 class="heading"><a name="TOC7"></a><a name="cr16"></a>CR16</h3>
219 1.3 mrg
220 1.3 mrg <p>The CR16 CompactRISC architecture is a 16-bit architecture. This architecture is
221 1.3 mrg used in embedded applications.
222 1.3 mrg
223 1.3 mrg <p>See “CR16 Options” in the main manual for a list of CR16-specific options.
224 1.3 mrg
225 1.3 mrg <p>Use ‘<samp><span class="samp">configure --target=cr16-elf --enable-languages=c,c++</span></samp>’ to configure
226 1.3 mrg GCC for building a CR16 elf cross-compiler.
227 1.3 mrg
228 1.3 mrg <p>Use ‘<samp><span class="samp">configure --target=cr16-uclinux --enable-languages=c,c++</span></samp>’ to configure
229 1.3 mrg GCC for building a CR16 uclinux cross-compiler.
230 1.3 mrg
231 1.3 mrg <p><hr />
232 1.3 mrg
233 1.3 mrg <h3 class="heading"><a name="TOC8"></a><a name="cris"></a>CRIS</h3>
234 1.1 mrg
235 1.1 mrg <p>CRIS is the CPU architecture in Axis Communications ETRAX system-on-a-chip
236 1.1 mrg series. These are used in embedded applications.
237 1.1 mrg
238 1.1 mrg <p>See “CRIS Options” in the main manual
239 1.1 mrg for a list of CRIS-specific options.
240 1.1 mrg
241 1.1 mrg <p>There are a few different CRIS targets:
242 1.1 mrg <dl>
243 1.1 mrg <dt><code>cris-axis-elf</code><dd>Mainly for monolithic embedded systems. Includes a multilib for the
244 1.1 mrg ‘<samp><span class="samp">v10</span></samp>’ core used in ‘<samp><span class="samp">ETRAX 100 LX</span></samp>’.
245 1.1 mrg <br><dt><code>cris-axis-linux-gnu</code><dd>A GNU/Linux port for the CRIS architecture, currently targeting
246 1.1 mrg ‘<samp><span class="samp">ETRAX 100 LX</span></samp>’ by default.
247 1.1 mrg </dl>
248 1.1 mrg
249 1.1 mrg <p>For <code>cris-axis-elf</code> you need binutils 2.11
250 1.1 mrg or newer. For <code>cris-axis-linux-gnu</code> you need binutils 2.12 or newer.
251 1.1 mrg
252 1.1 mrg <p>Pre-packaged tools can be obtained from
253 1.1 mrg <a href="ftp://ftp.axis.com/pub/axis/tools/cris/compiler-kit/">ftp://ftp.axis.com/pub/axis/tools/cris/compiler-kit/</a>. More
254 1.1 mrg information about this platform is available at
255 1.1 mrg <a href="http://developer.axis.com/">http://developer.axis.com/</a>.
256 1.1 mrg
257 1.1 mrg <p><hr />
258 1.1 mrg
259 1.3 mrg <h3 class="heading"><a name="TOC9"></a><a name="dos"></a>DOS</h3>
260 1.1 mrg
261 1.1 mrg <p>Please have a look at the <a href="binaries.html">binaries page</a>.
262 1.1 mrg
263 1.1 mrg <p>You cannot install GCC by itself on MSDOS; it will not compile under
264 1.1 mrg any MSDOS compiler except itself. You need to get the complete
265 1.1 mrg compilation package DJGPP, which includes binaries as well as sources,
266 1.1 mrg and includes all the necessary compilation tools and libraries.
267 1.1 mrg
268 1.1 mrg <p><hr />
269 1.1 mrg
270 1.3 mrg <h3 class="heading"><a name="TOC10"></a><a name="epiphany_002dx_002delf"></a>epiphany-*-elf</h3>
271 1.3 mrg
272 1.3 mrg <p>Adapteva Epiphany.
273 1.3 mrg This configuration is intended for embedded systems.
274 1.3 mrg
275 1.3 mrg <p><hr />
276 1.3 mrg
277 1.3 mrg <h3 class="heading"><a name="TOC11"></a><a name="x_002dx_002dfreebsd"></a>*-*-freebsd*</h3>
278 1.1 mrg
279 1.1 mrg <p>Support for FreeBSD 1 was discontinued in GCC 3.2. Support for
280 1.1 mrg FreeBSD 2 (and any mutant a.out variants of FreeBSD 3) was
281 1.1 mrg discontinued in GCC 4.0.
282 1.1 mrg
283 1.3 mrg <p>In order to better utilize FreeBSD base system functionality and match
284 1.3 mrg the configuration of the system compiler, GCC 4.5 and above as well as
285 1.3 mrg GCC 4.4 past 2010-06-20 leverage SSP support in libc (which is present
286 1.3 mrg on FreeBSD 7 or later) and the use of <code>__cxa_atexit</code> by default
287 1.3 mrg (on FreeBSD 6 or later). The use of <code>dl_iterate_phdr</code> inside
288 1.3 mrg <samp><span class="file">libgcc_s.so.1</span></samp> and boehm-gc (on FreeBSD 7 or later) is enabled
289 1.3 mrg by GCC 4.5 and above.
290 1.1 mrg
291 1.1 mrg <p>We support FreeBSD using the ELF file format with DWARF 2 debugging
292 1.1 mrg for all CPU architectures. You may use <samp><span class="option">-gstabs</span></samp> instead of
293 1.1 mrg <samp><span class="option">-g</span></samp>, if you really want the old debugging format. There are
294 1.1 mrg no known issues with mixing object files and libraries with different
295 1.1 mrg debugging formats. Otherwise, this release of GCC should now match
296 1.1 mrg more of the configuration used in the stock FreeBSD configuration of
297 1.1 mrg GCC. In particular, <samp><span class="option">--enable-threads</span></samp> is now configured by
298 1.1 mrg default. However, as a general user, do not attempt to replace the
299 1.1 mrg system compiler with this release. Known to bootstrap and check with
300 1.1 mrg good results on FreeBSD 7.2-STABLE. In the past, known to bootstrap
301 1.1 mrg and check with good results on FreeBSD 3.0, 3.4, 4.0, 4.2, 4.3, 4.4,
302 1.1 mrg 4.5, 4.8, 4.9 and 5-CURRENT.
303 1.1 mrg
304 1.1 mrg <p>The version of binutils installed in <samp><span class="file">/usr/bin</span></samp> probably works
305 1.1 mrg with this release of GCC. Bootstrapping against the latest GNU
306 1.1 mrg binutils and/or the version found in <samp><span class="file">/usr/ports/devel/binutils</span></samp> has
307 1.1 mrg been known to enable additional features and improve overall testsuite
308 1.1 mrg results. However, it is currently known that boehm-gc (which itself
309 1.1 mrg is required for java) may not configure properly on FreeBSD prior to
310 1.1 mrg the FreeBSD 7.0 release with GNU binutils after 2.16.1.
311 1.1 mrg
312 1.1 mrg <p><hr />
313 1.1 mrg
314 1.3 mrg <h3 class="heading"><a name="TOC12"></a><a name="h8300_002dhms"></a>h8300-hms</h3>
315 1.1 mrg
316 1.1 mrg <p>Renesas H8/300 series of processors.
317 1.1 mrg
318 1.1 mrg <p>Please have a look at the <a href="binaries.html">binaries page</a>.
319 1.1 mrg
320 1.1 mrg <p>The calling convention and structure layout has changed in release 2.6.
321 1.1 mrg All code must be recompiled. The calling convention now passes the
322 1.1 mrg first three arguments in function calls in registers. Structures are no
323 1.1 mrg longer a multiple of 2 bytes.
324 1.1 mrg
325 1.1 mrg <p><hr />
326 1.1 mrg
327 1.3 mrg <h3 class="heading"><a name="TOC13"></a><a name="hppa_002dhp_002dhpux"></a>hppa*-hp-hpux*</h3>
328 1.1 mrg
329 1.1 mrg <p>Support for HP-UX version 9 and older was discontinued in GCC 3.4.
330 1.1 mrg
331 1.1 mrg <p>We require using gas/binutils on all hppa platforms. Version 2.19 or
332 1.1 mrg later is recommended.
333 1.1 mrg
334 1.1 mrg <p>It may be helpful to configure GCC with the
335 1.1 mrg <a href="./configure.html#with-gnu-as"><samp><span class="option">--with-gnu-as</span></samp></a> and
336 1.1 mrg <samp><span class="option">--with-as=...</span></samp> options to ensure that GCC can find GAS.
337 1.1 mrg
338 1.1 mrg <p>The HP assembler should not be used with GCC. It is rarely tested and may
339 1.1 mrg not work. It shouldn't be used with any languages other than C due to its
340 1.1 mrg many limitations.
341 1.1 mrg
342 1.1 mrg <p>Specifically, <samp><span class="option">-g</span></samp> does not work (HP-UX uses a peculiar debugging
343 1.1 mrg format which GCC does not know about). It also inserts timestamps
344 1.1 mrg into each object file it creates, causing the 3-stage comparison test to
345 1.1 mrg fail during a bootstrap. You should be able to continue by saying
346 1.1 mrg ‘<samp><span class="samp">make all-host all-target</span></samp>’ after getting the failure from ‘<samp><span class="samp">make</span></samp>’.
347 1.1 mrg
348 1.1 mrg <p>Various GCC features are not supported. For example, it does not support weak
349 1.1 mrg symbols or alias definitions. As a result, explicit template instantiations
350 1.1 mrg are required when using C++. This makes it difficult if not impossible to
351 1.1 mrg build many C++ applications.
352 1.1 mrg
353 1.1 mrg <p>There are two default scheduling models for instructions. These are
354 1.1 mrg PROCESSOR_7100LC and PROCESSOR_8000. They are selected from the pa-risc
355 1.1 mrg architecture specified for the target machine when configuring.
356 1.1 mrg PROCESSOR_8000 is the default. PROCESSOR_7100LC is selected when
357 1.1 mrg the target is a ‘<samp><span class="samp">hppa1*</span></samp>’ machine.
358 1.1 mrg
359 1.1 mrg <p>The PROCESSOR_8000 model is not well suited to older processors. Thus,
360 1.1 mrg it is important to completely specify the machine architecture when
361 1.1 mrg configuring if you want a model other than PROCESSOR_8000. The macro
362 1.1 mrg TARGET_SCHED_DEFAULT can be defined in BOOT_CFLAGS if a different
363 1.1 mrg default scheduling model is desired.
364 1.1 mrg
365 1.1 mrg <p>As of GCC 4.0, GCC uses the UNIX 95 namespace for HP-UX 10.10
366 1.1 mrg through 11.00, and the UNIX 98 namespace for HP-UX 11.11 and later.
367 1.1 mrg This namespace change might cause problems when bootstrapping with
368 1.1 mrg an earlier version of GCC or the HP compiler as essentially the same
369 1.1 mrg namespace is required for an entire build. This problem can be avoided
370 1.1 mrg in a number of ways. With HP cc, <samp><span class="env">UNIX_STD</span></samp> can be set to ‘<samp><span class="samp">95</span></samp>’
371 1.1 mrg or ‘<samp><span class="samp">98</span></samp>’. Another way is to add an appropriate set of predefines
372 1.1 mrg to <samp><span class="env">CC</span></samp>. The description for the <samp><span class="option">munix=</span></samp> option contains
373 1.1 mrg a list of the predefines used with each standard.
374 1.1 mrg
375 1.1 mrg <p>More specific information to ‘<samp><span class="samp">hppa*-hp-hpux*</span></samp>’ targets follows.
376 1.1 mrg
377 1.1 mrg <p><hr />
378 1.1 mrg
379 1.3 mrg <h3 class="heading"><a name="TOC14"></a><a name="hppa_002dhp_002dhpux10"></a>hppa*-hp-hpux10</h3>
380 1.1 mrg
381 1.1 mrg <p>For hpux10.20, we <em>highly</em> recommend you pick up the latest sed patch
382 1.1 mrg <code>PHCO_19798</code> from HP.
383 1.1 mrg
384 1.1 mrg <p>The C++ ABI has changed incompatibly in GCC 4.0. COMDAT subspaces are
385 1.1 mrg used for one-only code and data. This resolves many of the previous
386 1.1 mrg problems in using C++ on this target. However, the ABI is not compatible
387 1.1 mrg with the one implemented under HP-UX 11 using secondary definitions.
388 1.1 mrg
389 1.1 mrg <p><hr />
390 1.1 mrg
391 1.3 mrg <h3 class="heading"><a name="TOC15"></a><a name="hppa_002dhp_002dhpux11"></a>hppa*-hp-hpux11</h3>
392 1.1 mrg
393 1.1 mrg <p>GCC 3.0 and up support HP-UX 11. GCC 2.95.x is not supported and cannot
394 1.1 mrg be used to compile GCC 3.0 and up.
395 1.1 mrg
396 1.1 mrg <p>The libffi and libjava libraries haven't been ported to 64-bit HP-UX and don't build.
397 1.1 mrg
398 1.1 mrg <p>Refer to <a href="binaries.html">binaries</a> for information about obtaining
399 1.1 mrg precompiled GCC binaries for HP-UX. Precompiled binaries must be obtained
400 1.1 mrg to build the Ada language as it can't be bootstrapped using C. Ada is
401 1.1 mrg only available for the 32-bit PA-RISC runtime.
402 1.1 mrg
403 1.1 mrg <p>Starting with GCC 3.4 an ISO C compiler is required to bootstrap. The
404 1.1 mrg bundled compiler supports only traditional C; you will need either HP's
405 1.1 mrg unbundled compiler, or a binary distribution of GCC.
406 1.1 mrg
407 1.1 mrg <p>It is possible to build GCC 3.3 starting with the bundled HP compiler,
408 1.1 mrg but the process requires several steps. GCC 3.3 can then be used to
409 1.1 mrg build later versions. The fastjar program contains ISO C code and
410 1.1 mrg can't be built with the HP bundled compiler. This problem can be
411 1.1 mrg avoided by not building the Java language. For example, use the
412 1.1 mrg <samp><span class="option">--enable-languages="c,c++,f77,objc"</span></samp> option in your configure
413 1.1 mrg command.
414 1.1 mrg
415 1.1 mrg <p>There are several possible approaches to building the distribution.
416 1.1 mrg Binutils can be built first using the HP tools. Then, the GCC
417 1.1 mrg distribution can be built. The second approach is to build GCC
418 1.1 mrg first using the HP tools, then build binutils, then rebuild GCC.
419 1.1 mrg There have been problems with various binary distributions, so it
420 1.1 mrg is best not to start from a binary distribution.
421 1.1 mrg
422 1.1 mrg <p>On 64-bit capable systems, there are two distinct targets. Different
423 1.1 mrg installation prefixes must be used if both are to be installed on
424 1.1 mrg the same system. The ‘<samp><span class="samp">hppa[1-2]*-hp-hpux11*</span></samp>’ target generates code
425 1.1 mrg for the 32-bit PA-RISC runtime architecture and uses the HP linker.
426 1.1 mrg The ‘<samp><span class="samp">hppa64-hp-hpux11*</span></samp>’ target generates 64-bit code for the
427 1.1 mrg PA-RISC 2.0 architecture.
428 1.1 mrg
429 1.1 mrg <p>The script config.guess now selects the target type based on the compiler
430 1.1 mrg detected during configuration. You must define <samp><span class="env">PATH</span></samp> or <samp><span class="env">CC</span></samp> so
431 1.1 mrg that configure finds an appropriate compiler for the initial bootstrap.
432 1.1 mrg When <samp><span class="env">CC</span></samp> is used, the definition should contain the options that are
433 1.1 mrg needed whenever <samp><span class="env">CC</span></samp> is used.
434 1.1 mrg
435 1.1 mrg <p>Specifically, options that determine the runtime architecture must be
436 1.1 mrg in <samp><span class="env">CC</span></samp> to correctly select the target for the build. It is also
437 1.1 mrg convenient to place many other compiler options in <samp><span class="env">CC</span></samp>. For example,
438 1.1 mrg <samp><span class="env">CC="cc -Ac +DA2.0W -Wp,-H16376 -D_CLASSIC_TYPES -D_HPUX_SOURCE"</span></samp>
439 1.1 mrg can be used to bootstrap the GCC 3.3 branch with the HP compiler in
440 1.1 mrg 64-bit K&R/bundled mode. The <samp><span class="option">+DA2.0W</span></samp> option will result in
441 1.1 mrg the automatic selection of the ‘<samp><span class="samp">hppa64-hp-hpux11*</span></samp>’ target. The
442 1.1 mrg macro definition table of cpp needs to be increased for a successful
443 1.1 mrg build with the HP compiler. _CLASSIC_TYPES and _HPUX_SOURCE need to
444 1.1 mrg be defined when building with the bundled compiler, or when using the
445 1.1 mrg <samp><span class="option">-Ac</span></samp> option. These defines aren't necessary with <samp><span class="option">-Ae</span></samp>.
446 1.1 mrg
447 1.1 mrg <p>It is best to explicitly configure the ‘<samp><span class="samp">hppa64-hp-hpux11*</span></samp>’ target
448 1.1 mrg with the <samp><span class="option">--with-ld=...</span></samp> option. This overrides the standard
449 1.1 mrg search for ld. The two linkers supported on this target require different
450 1.1 mrg commands. The default linker is determined during configuration. As a
451 1.1 mrg result, it's not possible to switch linkers in the middle of a GCC build.
452 1.1 mrg This has been reported to sometimes occur in unified builds of binutils
453 1.1 mrg and GCC.
454 1.1 mrg
455 1.1 mrg <p>A recent linker patch must be installed for the correct operation of
456 1.1 mrg GCC 3.3 and later. <code>PHSS_26559</code> and <code>PHSS_24304</code> are the
457 1.1 mrg oldest linker patches that are known to work. They are for HP-UX
458 1.1 mrg 11.00 and 11.11, respectively. <code>PHSS_24303</code>, the companion to
459 1.1 mrg <code>PHSS_24304</code>, might be usable but it hasn't been tested. These
460 1.1 mrg patches have been superseded. Consult the HP patch database to obtain
461 1.1 mrg the currently recommended linker patch for your system.
462 1.1 mrg
463 1.1 mrg <p>The patches are necessary for the support of weak symbols on the
464 1.1 mrg 32-bit port, and for the running of initializers and finalizers. Weak
465 1.1 mrg symbols are implemented using SOM secondary definition symbols. Prior
466 1.1 mrg to HP-UX 11, there are bugs in the linker support for secondary symbols.
467 1.1 mrg The patches correct a problem of linker core dumps creating shared
468 1.1 mrg libraries containing secondary symbols, as well as various other
469 1.1 mrg linking issues involving secondary symbols.
470 1.1 mrg
471 1.1 mrg <p>GCC 3.3 uses the ELF DT_INIT_ARRAY and DT_FINI_ARRAY capabilities to
472 1.1 mrg run initializers and finalizers on the 64-bit port. The 32-bit port
473 1.1 mrg uses the linker <samp><span class="option">+init</span></samp> and <samp><span class="option">+fini</span></samp> options for the same
474 1.1 mrg purpose. The patches correct various problems with the +init/+fini
475 1.1 mrg options, including program core dumps. Binutils 2.14 corrects a
476 1.1 mrg problem on the 64-bit port resulting from HP's non-standard use of
477 1.1 mrg the .init and .fini sections for array initializers and finalizers.
478 1.1 mrg
479 1.1 mrg <p>Although the HP and GNU linkers are both supported for the
480 1.1 mrg ‘<samp><span class="samp">hppa64-hp-hpux11*</span></samp>’ target, it is strongly recommended that the
481 1.1 mrg HP linker be used for link editing on this target.
482 1.1 mrg
483 1.1 mrg <p>At this time, the GNU linker does not support the creation of long
484 1.1 mrg branch stubs. As a result, it can't successfully link binaries
485 1.1 mrg containing branch offsets larger than 8 megabytes. In addition,
486 1.1 mrg there are problems linking shared libraries, linking executables
487 1.1 mrg with <samp><span class="option">-static</span></samp>, and with dwarf2 unwind and exception support.
488 1.1 mrg It also doesn't provide stubs for internal calls to global functions
489 1.1 mrg in shared libraries, so these calls can't be overloaded.
490 1.1 mrg
491 1.1 mrg <p>The HP dynamic loader does not support GNU symbol versioning, so symbol
492 1.1 mrg versioning is not supported. It may be necessary to disable symbol
493 1.1 mrg versioning with <samp><span class="option">--disable-symvers</span></samp> when using GNU ld.
494 1.1 mrg
495 1.1 mrg <p>POSIX threads are the default. The optional DCE thread library is not
496 1.1 mrg supported, so <samp><span class="option">--enable-threads=dce</span></samp> does not work.
497 1.1 mrg
498 1.1 mrg <p><hr />
499 1.1 mrg
500 1.3 mrg <h3 class="heading"><a name="TOC16"></a><a name="x_002dx_002dlinux_002dgnu"></a>*-*-linux-gnu</h3>
501 1.1 mrg
502 1.1 mrg <p>Versions of libstdc++-v3 starting with 3.2.1 require bug fixes present
503 1.1 mrg in glibc 2.2.5 and later. More information is available in the
504 1.1 mrg libstdc++-v3 documentation.
505 1.1 mrg
506 1.1 mrg <p><hr />
507 1.1 mrg
508 1.3 mrg <h3 class="heading"><a name="TOC17"></a><a name="ix86_002dx_002dlinux"></a>i?86-*-linux*</h3>
509 1.1 mrg
510 1.1 mrg <p>As of GCC 3.3, binutils 2.13.1 or later is required for this platform.
511 1.1 mrg See <a href="http://gcc.gnu.org/PR10877">bug 10877</a> for more information.
512 1.1 mrg
513 1.1 mrg <p>If you receive Signal 11 errors when building on GNU/Linux, then it is
514 1.1 mrg possible you have a hardware problem. Further information on this can be
515 1.1 mrg found on <a href="http://www.bitwizard.nl/sig11/">www.bitwizard.nl</a>.
516 1.1 mrg
517 1.1 mrg <p><hr />
518 1.1 mrg
519 1.3 mrg <h3 class="heading"><a name="TOC18"></a><a name="ix86_002dx_002dsolaris29"></a>i?86-*-solaris2.9</h3>
520 1.1 mrg
521 1.3 mrg <p>The Sun assembler in Solaris 9 has several bugs and limitations.
522 1.1 mrg While GCC works around them, several features are missing, so it is
523 1.1 mrg <!-- FIXME: which ones? -->
524 1.1 mrg recommended to use the GNU assembler instead. There is no bundled
525 1.3 mrg version, but the current version, from GNU binutils 2.22, is known to
526 1.1 mrg work.
527 1.1 mrg
528 1.3 mrg <p>Solaris 2/x86 doesn't support the execution of SSE/SSE2 instructions
529 1.3 mrg before Solaris 9 4/04, even if the CPU supports them. Programs will
530 1.1 mrg receive <code>SIGILL</code> if they try. The fix is available both in
531 1.3 mrg Solaris 9 Update 6 and kernel patch 112234-12 or newer. To
532 1.3 mrg avoid this problem,
533 1.3 mrg <samp><span class="option">-march</span></samp> defaults to ‘<samp><span class="samp">pentiumpro</span></samp>’ on Solaris 9. If
534 1.1 mrg you have the patch installed, you can configure GCC with an appropriate
535 1.1 mrg <samp><span class="option">--with-arch</span></samp> option, but need GNU <samp><span class="command">as</span></samp> for SSE2 support.
536 1.1 mrg
537 1.1 mrg <p><hr />
538 1.1 mrg
539 1.3 mrg <h3 class="heading"><a name="TOC19"></a><a name="ix86_002dx_002dsolaris210"></a>i?86-*-solaris2.10</h3>
540 1.1 mrg
541 1.3 mrg <p>Use this for Solaris 10 or later on x86 and x86-64 systems. Starting
542 1.3 mrg with GCC 4.7, there is also a 64-bit ‘<samp><span class="samp">amd64-*-solaris2.1[0-9]*</span></samp>’ or
543 1.3 mrg ‘<samp><span class="samp">x86_64-*-solaris2.1[0-9]*</span></samp>’ configuration that corresponds to
544 1.3 mrg ‘<samp><span class="samp">sparcv9-sun-solaris2*</span></samp>’.
545 1.1 mrg
546 1.1 mrg <p>It is recommended that you configure GCC to use the GNU assembler, in
547 1.1 mrg <samp><span class="file">/usr/sfw/bin/gas</span></samp>. The versions included in Solaris 10, from GNU
548 1.1 mrg binutils 2.15, and Solaris 11, from GNU binutils 2.19, work fine,
549 1.1 mrg although the current version, from GNU binutils
550 1.3 mrg 2.22, is known to work, too. Recent versions of the Sun assembler in
551 1.1 mrg <samp><span class="file">/usr/ccs/bin/as</span></samp> work almost as well, though.
552 1.1 mrg <!-- FIXME: as patch requirements? -->
553 1.1 mrg
554 1.1 mrg <p>For linking, the Sun linker, is preferred. If you want to use the GNU
555 1.1 mrg linker instead, which is available in <samp><span class="file">/usr/sfw/bin/gld</span></samp>, note that
556 1.1 mrg due to a packaging bug the version in Solaris 10, from GNU binutils
557 1.1 mrg 2.15, cannot be used, while the version in Solaris 11, from GNU binutils
558 1.3 mrg 2.19, works, as does the latest version, from GNU binutils 2.22.
559 1.1 mrg
560 1.1 mrg <p>To use GNU <samp><span class="command">as</span></samp>, configure with the options
561 1.1 mrg <samp><span class="option">--with-gnu-as --with-as=/usr/sfw/bin/gas</span></samp>. It may be necessary
562 1.1 mrg to configure with <samp><span class="option">--without-gnu-ld --with-ld=/usr/ccs/bin/ld</span></samp> to
563 1.1 mrg guarantee use of Sun <samp><span class="command">ld</span></samp>.
564 1.1 mrg <!-- FIXME: why -without-gnu-ld -with-ld? -->
565 1.1 mrg
566 1.1 mrg <p><hr />
567 1.1 mrg
568 1.3 mrg <h3 class="heading"><a name="TOC20"></a><a name="ia64_002dx_002dlinux"></a>ia64-*-linux</h3>
569 1.1 mrg
570 1.1 mrg <p>IA-64 processor (also known as IPF, or Itanium Processor Family)
571 1.1 mrg running GNU/Linux.
572 1.1 mrg
573 1.1 mrg <p>If you are using the installed system libunwind library with
574 1.1 mrg <samp><span class="option">--with-system-libunwind</span></samp>, then you must use libunwind 0.98 or
575 1.1 mrg later.
576 1.1 mrg
577 1.1 mrg <p>None of the following versions of GCC has an ABI that is compatible
578 1.1 mrg with any of the other versions in this list, with the exception that
579 1.1 mrg Red Hat 2.96 and Trillian 000171 are compatible with each other:
580 1.1 mrg 3.1, 3.0.2, 3.0.1, 3.0, Red Hat 2.96, and Trillian 000717.
581 1.1 mrg This primarily affects C++ programs and programs that create shared libraries.
582 1.1 mrg GCC 3.1 or later is recommended for compiling linux, the kernel.
583 1.1 mrg As of version 3.1 GCC is believed to be fully ABI compliant, and hence no
584 1.1 mrg more major ABI changes are expected.
585 1.1 mrg
586 1.1 mrg <p><hr />
587 1.1 mrg
588 1.3 mrg <h3 class="heading"><a name="TOC21"></a><a name="ia64_002dx_002dhpux"></a>ia64-*-hpux*</h3>
589 1.1 mrg
590 1.1 mrg <p>Building GCC on this target requires the GNU Assembler. The bundled HP
591 1.1 mrg assembler will not work. To prevent GCC from using the wrong assembler,
592 1.1 mrg the option <samp><span class="option">--with-gnu-as</span></samp> may be necessary.
593 1.1 mrg
594 1.1 mrg <p>The GCC libunwind library has not been ported to HPUX. This means that for
595 1.1 mrg GCC versions 3.2.3 and earlier, <samp><span class="option">--enable-libunwind-exceptions</span></samp>
596 1.1 mrg is required to build GCC. For GCC 3.3 and later, this is the default.
597 1.1 mrg For gcc 3.4.3 and later, <samp><span class="option">--enable-libunwind-exceptions</span></samp> is
598 1.1 mrg removed and the system libunwind library will always be used.
599 1.1 mrg
600 1.1 mrg <p><hr />
601 1.1 mrg <!-- rs6000-ibm-aix*, powerpc-ibm-aix* -->
602 1.1 mrg
603 1.3 mrg <h3 class="heading"><a name="TOC22"></a><a name="x_002dibm_002daix"></a>*-ibm-aix*</h3>
604 1.1 mrg
605 1.1 mrg <p>Support for AIX version 3 and older was discontinued in GCC 3.4.
606 1.1 mrg Support for AIX version 4.2 and older was discontinued in GCC 4.5.
607 1.1 mrg
608 1.1 mrg <p>“out of memory” bootstrap failures may indicate a problem with
609 1.1 mrg process resource limits (ulimit). Hard limits are configured in the
610 1.1 mrg <samp><span class="file">/etc/security/limits</span></samp> system configuration file.
611 1.1 mrg
612 1.1 mrg <p>GCC can bootstrap with recent versions of IBM XLC, but bootstrapping
613 1.1 mrg with an earlier release of GCC is recommended. Bootstrapping with XLC
614 1.1 mrg requires a larger data segment, which can be enabled through the
615 1.1 mrg <var>LDR_CNTRL</var> environment variable, e.g.,
616 1.1 mrg
617 1.3 mrg <pre class="smallexample"> % LDR_CNTRL=MAXDATA=0x50000000
618 1.3 mrg % export LDR_CNTRL
619 1.1 mrg </pre>
620 1.1 mrg <p>One can start with a pre-compiled version of GCC to build from
621 1.1 mrg sources. One may delete GCC's “fixed” header files when starting
622 1.1 mrg with a version of GCC built for an earlier release of AIX.
623 1.1 mrg
624 1.1 mrg <p>To speed up the configuration phases of bootstrapping and installing GCC,
625 1.1 mrg one may use GNU Bash instead of AIX <samp><span class="command">/bin/sh</span></samp>, e.g.,
626 1.1 mrg
627 1.3 mrg <pre class="smallexample"> % CONFIG_SHELL=/opt/freeware/bin/bash
628 1.3 mrg % export CONFIG_SHELL
629 1.1 mrg </pre>
630 1.1 mrg <p>and then proceed as described in <a href="build.html">the build instructions</a>, where we strongly recommend specifying an absolute path
631 1.1 mrg to invoke <var>srcdir</var>/configure.
632 1.1 mrg
633 1.1 mrg <p>Because GCC on AIX is built as a 32-bit executable by default,
634 1.1 mrg (although it can generate 64-bit programs) the GMP and MPFR libraries
635 1.1 mrg required by gfortran must be 32-bit libraries. Building GMP and MPFR
636 1.1 mrg as static archive libraries works better than shared libraries.
637 1.1 mrg
638 1.1 mrg <p>Errors involving <code>alloca</code> when building GCC generally are due
639 1.1 mrg to an incorrect definition of <code>CC</code> in the Makefile or mixing files
640 1.1 mrg compiled with the native C compiler and GCC. During the stage1 phase of
641 1.1 mrg the build, the native AIX compiler <strong>must</strong> be invoked as <samp><span class="command">cc</span></samp>
642 1.1 mrg (not <samp><span class="command">xlc</span></samp>). Once <samp><span class="command">configure</span></samp> has been informed of
643 1.1 mrg <samp><span class="command">xlc</span></samp>, one needs to use ‘<samp><span class="samp">make distclean</span></samp>’ to remove the
644 1.1 mrg configure cache files and ensure that <samp><span class="env">CC</span></samp> environment variable
645 1.1 mrg does not provide a definition that will confuse <samp><span class="command">configure</span></samp>.
646 1.1 mrg If this error occurs during stage2 or later, then the problem most likely
647 1.1 mrg is the version of Make (see above).
648 1.1 mrg
649 1.3 mrg <p>The native <samp><span class="command">as</span></samp> and <samp><span class="command">ld</span></samp> are recommended for
650 1.3 mrg bootstrapping on AIX. The GNU Assembler, GNU Linker, and GNU
651 1.3 mrg Binutils version 2.20 is the minimum level that supports bootstrap on
652 1.3 mrg AIX 5. The GNU Assembler has not been updated to support AIX 6 or
653 1.3 mrg AIX 7. The native AIX tools do interoperate with GCC.
654 1.3 mrg
655 1.3 mrg <p>AIX 5.3 TL10, AIX 6.1 TL05 and AIX 7.1 TL00 introduced an AIX
656 1.3 mrg assembler change that sometimes produces corrupt assembly files
657 1.3 mrg causing AIX linker errors. The bug breaks GCC bootstrap on AIX and
658 1.3 mrg can cause compilation failures with existing GCC installations. An
659 1.3 mrg AIX iFix for AIX 5.3 is available (APAR IZ98385 for AIX 5.3 TL10, APAR
660 1.3 mrg IZ98477 for AIX 5.3 TL11 and IZ98134 for AIX 5.3 TL12). AIX 5.3 TL11 SP8,
661 1.3 mrg AIX 5.3 TL12 SP5, AIX 6.1 TL04 SP11, AIX 6.1 TL05 SP7, AIX 6.1 TL06 SP6,
662 1.3 mrg AIX 6.1 TL07 and AIX 7.1 TL01 should include the fix.
663 1.1 mrg
664 1.1 mrg <p>Building <samp><span class="file">libstdc++.a</span></samp> requires a fix for an AIX Assembler bug
665 1.1 mrg APAR IY26685 (AIX 4.3) or APAR IY25528 (AIX 5.1). It also requires a
666 1.1 mrg fix for another AIX Assembler bug and a co-dependent AIX Archiver fix
667 1.1 mrg referenced as APAR IY53606 (AIX 5.2) or as APAR IY54774 (AIX 5.1)
668 1.1 mrg
669 1.1 mrg <p>‘<samp><span class="samp">libstdc++</span></samp>’ in GCC 3.4 increments the major version number of the
670 1.1 mrg shared object and GCC installation places the <samp><span class="file">libstdc++.a</span></samp>
671 1.1 mrg shared library in a common location which will overwrite the and GCC
672 1.1 mrg 3.3 version of the shared library. Applications either need to be
673 1.1 mrg re-linked against the new shared library or the GCC 3.1 and GCC 3.3
674 1.1 mrg versions of the ‘<samp><span class="samp">libstdc++</span></samp>’ shared object needs to be available
675 1.1 mrg to the AIX runtime loader. The GCC 3.1 ‘<samp><span class="samp">libstdc++.so.4</span></samp>’, if
676 1.1 mrg present, and GCC 3.3 ‘<samp><span class="samp">libstdc++.so.5</span></samp>’ shared objects can be
677 1.1 mrg installed for runtime dynamic loading using the following steps to set
678 1.1 mrg the ‘<samp><span class="samp">F_LOADONLY</span></samp>’ flag in the shared object for <em>each</em>
679 1.1 mrg multilib <samp><span class="file">libstdc++.a</span></samp> installed:
680 1.1 mrg
681 1.1 mrg <p>Extract the shared objects from the currently installed
682 1.1 mrg <samp><span class="file">libstdc++.a</span></samp> archive:
683 1.3 mrg <pre class="smallexample"> % ar -x libstdc++.a libstdc++.so.4 libstdc++.so.5
684 1.1 mrg </pre>
685 1.1 mrg <p>Enable the ‘<samp><span class="samp">F_LOADONLY</span></samp>’ flag so that the shared object will be
686 1.1 mrg available for runtime dynamic loading, but not linking:
687 1.3 mrg <pre class="smallexample"> % strip -e libstdc++.so.4 libstdc++.so.5
688 1.1 mrg </pre>
689 1.1 mrg <p>Archive the runtime-only shared object in the GCC 3.4
690 1.1 mrg <samp><span class="file">libstdc++.a</span></samp> archive:
691 1.3 mrg <pre class="smallexample"> % ar -q libstdc++.a libstdc++.so.4 libstdc++.so.5
692 1.1 mrg </pre>
693 1.1 mrg <p>Linking executables and shared libraries may produce warnings of
694 1.1 mrg duplicate symbols. The assembly files generated by GCC for AIX always
695 1.1 mrg have included multiple symbol definitions for certain global variable
696 1.1 mrg and function declarations in the original program. The warnings should
697 1.1 mrg not prevent the linker from producing a correct library or runnable
698 1.1 mrg executable.
699 1.1 mrg
700 1.1 mrg <p>AIX 4.3 utilizes a “large format” archive to support both 32-bit and
701 1.1 mrg 64-bit object modules. The routines provided in AIX 4.3.0 and AIX 4.3.1
702 1.1 mrg to parse archive libraries did not handle the new format correctly.
703 1.1 mrg These routines are used by GCC and result in error messages during
704 1.1 mrg linking such as “not a COFF file”. The version of the routines shipped
705 1.1 mrg with AIX 4.3.1 should work for a 32-bit environment. The <samp><span class="option">-g</span></samp>
706 1.1 mrg option of the archive command may be used to create archives of 32-bit
707 1.1 mrg objects using the original “small format”. A correct version of the
708 1.1 mrg routines is shipped with AIX 4.3.2 and above.
709 1.1 mrg
710 1.1 mrg <p>Some versions of the AIX binder (linker) can fail with a relocation
711 1.1 mrg overflow severe error when the <samp><span class="option">-bbigtoc</span></samp> option is used to link
712 1.1 mrg GCC-produced object files into an executable that overflows the TOC. A fix
713 1.1 mrg for APAR IX75823 (OVERFLOW DURING LINK WHEN USING GCC AND -BBIGTOC) is
714 1.1 mrg available from IBM Customer Support and from its
715 1.1 mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
716 1.1 mrg website as PTF U455193.
717 1.1 mrg
718 1.1 mrg <p>The AIX 4.3.2.1 linker (bos.rte.bind_cmds Level 4.3.2.1) will dump core
719 1.1 mrg with a segmentation fault when invoked by any version of GCC. A fix for
720 1.1 mrg APAR IX87327 is available from IBM Customer Support and from its
721 1.1 mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
722 1.1 mrg website as PTF U461879. This fix is incorporated in AIX 4.3.3 and above.
723 1.1 mrg
724 1.1 mrg <p>The initial assembler shipped with AIX 4.3.0 generates incorrect object
725 1.1 mrg files. A fix for APAR IX74254 (64BIT DISASSEMBLED OUTPUT FROM COMPILER FAILS
726 1.1 mrg TO ASSEMBLE/BIND) is available from IBM Customer Support and from its
727 1.1 mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
728 1.1 mrg website as PTF U453956. This fix is incorporated in AIX 4.3.1 and above.
729 1.1 mrg
730 1.1 mrg <p>AIX provides National Language Support (NLS). Compilers and assemblers
731 1.1 mrg use NLS to support locale-specific representations of various data
732 1.1 mrg formats including floating-point numbers (e.g., ‘<samp><span class="samp">.</span></samp>’ vs ‘<samp><span class="samp">,</span></samp>’ for
733 1.1 mrg separating decimal fractions). There have been problems reported where
734 1.1 mrg GCC does not produce the same floating-point formats that the assembler
735 1.1 mrg expects. If one encounters this problem, set the <samp><span class="env">LANG</span></samp>
736 1.1 mrg environment variable to ‘<samp><span class="samp">C</span></samp>’ or ‘<samp><span class="samp">En_US</span></samp>’.
737 1.1 mrg
738 1.1 mrg <p>A default can be specified with the <samp><span class="option">-mcpu=</span><var>cpu_type</var></samp>
739 1.1 mrg switch and using the configure option <samp><span class="option">--with-cpu-</span><var>cpu_type</var></samp>.
740 1.1 mrg
741 1.1 mrg <p><hr />
742 1.1 mrg
743 1.3 mrg <h3 class="heading"><a name="TOC23"></a><a name="iq2000_002dx_002delf"></a>iq2000-*-elf</h3>
744 1.1 mrg
745 1.1 mrg <p>Vitesse IQ2000 processors. These are used in embedded
746 1.1 mrg applications. There are no standard Unix configurations.
747 1.1 mrg
748 1.1 mrg <p><hr />
749 1.1 mrg
750 1.3 mrg <h3 class="heading"><a name="TOC24"></a><a name="lm32_002dx_002delf"></a>lm32-*-elf</h3>
751 1.1 mrg
752 1.1 mrg <p>Lattice Mico32 processor.
753 1.1 mrg This configuration is intended for embedded systems.
754 1.1 mrg
755 1.1 mrg <p><hr />
756 1.1 mrg
757 1.3 mrg <h3 class="heading"><a name="TOC25"></a><a name="lm32_002dx_002duclinux"></a>lm32-*-uclinux</h3>
758 1.1 mrg
759 1.1 mrg <p>Lattice Mico32 processor.
760 1.1 mrg This configuration is intended for embedded systems running uClinux.
761 1.1 mrg
762 1.1 mrg <p><hr />
763 1.1 mrg
764 1.3 mrg <h3 class="heading"><a name="TOC26"></a><a name="m32c_002dx_002delf"></a>m32c-*-elf</h3>
765 1.1 mrg
766 1.1 mrg <p>Renesas M32C processor.
767 1.1 mrg This configuration is intended for embedded systems.
768 1.1 mrg
769 1.1 mrg <p><hr />
770 1.1 mrg
771 1.3 mrg <h3 class="heading"><a name="TOC27"></a><a name="m32r_002dx_002delf"></a>m32r-*-elf</h3>
772 1.1 mrg
773 1.1 mrg <p>Renesas M32R processor.
774 1.1 mrg This configuration is intended for embedded systems.
775 1.1 mrg
776 1.1 mrg <p><hr />
777 1.1 mrg
778 1.1 mrg <h3 class="heading"><a name="TOC28"></a><a name="m68k_002dx_002dx"></a>m68k-*-*</h3>
779 1.1 mrg
780 1.1 mrg <p>By default,
781 1.1 mrg ‘<samp><span class="samp">m68k-*-elf*</span></samp>’, ‘<samp><span class="samp">m68k-*-rtems</span></samp>’, ‘<samp><span class="samp">m68k-*-uclinux</span></samp>’ and
782 1.1 mrg ‘<samp><span class="samp">m68k-*-linux</span></samp>’
783 1.1 mrg build libraries for both M680x0 and ColdFire processors. If you only
784 1.1 mrg need the M680x0 libraries, you can omit the ColdFire ones by passing
785 1.1 mrg <samp><span class="option">--with-arch=m68k</span></samp> to <samp><span class="command">configure</span></samp>. Alternatively, you
786 1.1 mrg can omit the M680x0 libraries by passing <samp><span class="option">--with-arch=cf</span></samp> to
787 1.1 mrg <samp><span class="command">configure</span></samp>. These targets default to 5206 or 5475 code as
788 1.1 mrg appropriate for the target system when
789 1.1 mrg configured with <samp><span class="option">--with-arch=cf</span></samp> and 68020 code otherwise.
790 1.1 mrg
791 1.1 mrg <p>The ‘<samp><span class="samp">m68k-*-netbsd</span></samp>’ and
792 1.1 mrg ‘<samp><span class="samp">m68k-*-openbsd</span></samp>’ targets also support the <samp><span class="option">--with-arch</span></samp>
793 1.1 mrg option. They will generate ColdFire CFV4e code when configured with
794 1.1 mrg <samp><span class="option">--with-arch=cf</span></samp> and 68020 code otherwise.
795 1.1 mrg
796 1.1 mrg <p>You can override the default processors listed above by configuring
797 1.1 mrg with <samp><span class="option">--with-cpu=</span><var>target</var></samp>. This <var>target</var> can either
798 1.1 mrg be a <samp><span class="option">-mcpu</span></samp> argument or one of the following values:
799 1.1 mrg ‘<samp><span class="samp">m68000</span></samp>’, ‘<samp><span class="samp">m68010</span></samp>’, ‘<samp><span class="samp">m68020</span></samp>’, ‘<samp><span class="samp">m68030</span></samp>’,
800 1.1 mrg ‘<samp><span class="samp">m68040</span></samp>’, ‘<samp><span class="samp">m68060</span></samp>’, ‘<samp><span class="samp">m68020-40</span></samp>’ and ‘<samp><span class="samp">m68020-60</span></samp>’.
801 1.1 mrg
802 1.3 mrg <p>GCC requires at least binutils version 2.17 on these targets.
803 1.3 mrg
804 1.1 mrg <p><hr />
805 1.1 mrg
806 1.1 mrg <h3 class="heading"><a name="TOC29"></a><a name="m68k_002dx_002duclinux"></a>m68k-*-uclinux</h3>
807 1.1 mrg
808 1.1 mrg <p>GCC 4.3 changed the uClinux configuration so that it uses the
809 1.1 mrg ‘<samp><span class="samp">m68k-linux-gnu</span></samp>’ ABI rather than the ‘<samp><span class="samp">m68k-elf</span></samp>’ ABI.
810 1.1 mrg It also added improved support for C++ and flat shared libraries,
811 1.3 mrg both of which were ABI changes.
812 1.1 mrg
813 1.1 mrg <p><hr />
814 1.1 mrg
815 1.1 mrg <h3 class="heading"><a name="TOC30"></a><a name="mep_002dx_002delf"></a>mep-*-elf</h3>
816 1.1 mrg
817 1.1 mrg <p>Toshiba Media embedded Processor.
818 1.1 mrg This configuration is intended for embedded systems.
819 1.1 mrg
820 1.1 mrg <p><hr />
821 1.1 mrg
822 1.3 mrg <h3 class="heading"><a name="TOC31"></a><a name="microblaze_002dx_002delf"></a>microblaze-*-elf</h3>
823 1.3 mrg
824 1.3 mrg <p>Xilinx MicroBlaze processor.
825 1.3 mrg This configuration is intended for embedded systems.
826 1.3 mrg
827 1.3 mrg <p><hr />
828 1.3 mrg
829 1.3 mrg <h3 class="heading"><a name="TOC32"></a><a name="mips_002dx_002dx"></a>mips-*-*</h3>
830 1.1 mrg
831 1.1 mrg <p>If on a MIPS system you get an error message saying “does not have gp
832 1.1 mrg sections for all it's [sic] sectons [sic]”, don't worry about it. This
833 1.1 mrg happens whenever you use GAS with the MIPS linker, but there is not
834 1.1 mrg really anything wrong, and it is okay to use the output file. You can
835 1.1 mrg stop such warnings by installing the GNU linker.
836 1.1 mrg
837 1.1 mrg <p>It would be nice to extend GAS to produce the gp tables, but they are
838 1.1 mrg optional, and there should not be a warning about their absence.
839 1.1 mrg
840 1.1 mrg <p>The libstdc++ atomic locking routines for MIPS targets requires MIPS II
841 1.1 mrg and later. A patch went in just after the GCC 3.3 release to
842 1.1 mrg make ‘<samp><span class="samp">mips*-*-*</span></samp>’ use the generic implementation instead. You can also
843 1.1 mrg configure for ‘<samp><span class="samp">mipsel-elf</span></samp>’ as a workaround. The
844 1.1 mrg ‘<samp><span class="samp">mips*-*-linux*</span></samp>’ target continues to use the MIPS II routines. More
845 1.1 mrg work on this is expected in future releases.
846 1.1 mrg
847 1.1 mrg <!-- If you make -with-llsc the default for another target, please also -->
848 1.1 mrg <!-- update the description of the -with-llsc option. -->
849 1.1 mrg <p>The built-in <code>__sync_*</code> functions are available on MIPS II and
850 1.1 mrg later systems and others that support the ‘<samp><span class="samp">ll</span></samp>’, ‘<samp><span class="samp">sc</span></samp>’ and
851 1.1 mrg ‘<samp><span class="samp">sync</span></samp>’ instructions. This can be overridden by passing
852 1.1 mrg <samp><span class="option">--with-llsc</span></samp> or <samp><span class="option">--without-llsc</span></samp> when configuring GCC.
853 1.1 mrg Since the Linux kernel emulates these instructions if they are
854 1.1 mrg missing, the default for ‘<samp><span class="samp">mips*-*-linux*</span></samp>’ targets is
855 1.1 mrg <samp><span class="option">--with-llsc</span></samp>. The <samp><span class="option">--with-llsc</span></samp> and
856 1.1 mrg <samp><span class="option">--without-llsc</span></samp> configure options may be overridden at compile
857 1.1 mrg time by passing the <samp><span class="option">-mllsc</span></samp> or <samp><span class="option">-mno-llsc</span></samp> options to
858 1.1 mrg the compiler.
859 1.1 mrg
860 1.1 mrg <p>MIPS systems check for division by zero (unless
861 1.1 mrg <samp><span class="option">-mno-check-zero-division</span></samp> is passed to the compiler) by
862 1.1 mrg generating either a conditional trap or a break instruction. Using
863 1.1 mrg trap results in smaller code, but is only supported on MIPS II and
864 1.1 mrg later. Also, some versions of the Linux kernel have a bug that
865 1.1 mrg prevents trap from generating the proper signal (<code>SIGFPE</code>). To enable
866 1.1 mrg the use of break, use the <samp><span class="option">--with-divide=breaks</span></samp>
867 1.1 mrg <samp><span class="command">configure</span></samp> option when configuring GCC. The default is to
868 1.1 mrg use traps on systems that support them.
869 1.1 mrg
870 1.1 mrg <p>The assembler from GNU binutils 2.17 and earlier has a bug in the way
871 1.1 mrg it sorts relocations for REL targets (o32, o64, EABI). This can cause
872 1.1 mrg bad code to be generated for simple C++ programs. Also the linker
873 1.1 mrg from GNU binutils versions prior to 2.17 has a bug which causes the
874 1.1 mrg runtime linker stubs in very large programs, like <samp><span class="file">libgcj.so</span></samp>, to
875 1.1 mrg be incorrectly generated. GNU Binutils 2.18 and later (and snapshots
876 1.1 mrg made after Nov. 9, 2006) should be free from both of these problems.
877 1.1 mrg
878 1.1 mrg <p><hr />
879 1.1 mrg
880 1.3 mrg <h3 class="heading"><a name="TOC33"></a><a name="mips_002dsgi_002dirix5"></a>mips-sgi-irix5</h3>
881 1.1 mrg
882 1.3 mrg <p>Support for IRIX 5 has been removed in GCC 4.6.
883 1.1 mrg
884 1.1 mrg <p><hr />
885 1.1 mrg
886 1.3 mrg <h3 class="heading"><a name="TOC34"></a><a name="mips_002dsgi_002dirix6"></a>mips-sgi-irix6</h3>
887 1.1 mrg
888 1.3 mrg <p>Support for IRIX 6.5 has been removed in GCC 4.8. Support for IRIX 6
889 1.3 mrg releases before 6.5 has been removed in GCC 4.6, as well as support for
890 1.3 mrg the O32 ABI.
891 1.1 mrg
892 1.1 mrg <p><hr />
893 1.1 mrg
894 1.3 mrg <h3 class="heading"><a name="TOC35"></a><a name="moxie_002dx_002delf"></a>moxie-*-elf</h3>
895 1.1 mrg
896 1.3 mrg <p>The moxie processor.
897 1.1 mrg
898 1.1 mrg <p><hr />
899 1.1 mrg
900 1.3 mrg <h3 class="heading"><a name="TOC36"></a><a name="powerpc_002dx_002dx"></a>powerpc-*-*</h3>
901 1.1 mrg
902 1.1 mrg <p>You can specify a default version for the <samp><span class="option">-mcpu=</span><var>cpu_type</var></samp>
903 1.1 mrg switch by using the configure option <samp><span class="option">--with-cpu-</span><var>cpu_type</var></samp>.
904 1.1 mrg
905 1.1 mrg <p>You will need
906 1.1 mrg <a href="ftp://ftp.kernel.org/pub/linux/devel/binutils">binutils 2.15</a>
907 1.1 mrg or newer for a working GCC.
908 1.1 mrg
909 1.1 mrg <p><hr />
910 1.1 mrg
911 1.3 mrg <h3 class="heading"><a name="TOC37"></a><a name="powerpc_002dx_002ddarwin"></a>powerpc-*-darwin*</h3>
912 1.1 mrg
913 1.1 mrg <p>PowerPC running Darwin (Mac OS X kernel).
914 1.1 mrg
915 1.1 mrg <p>Pre-installed versions of Mac OS X may not include any developer tools,
916 1.1 mrg meaning that you will not be able to build GCC from source. Tool
917 1.1 mrg binaries are available at
918 1.3 mrg <a href="http://opensource.apple.com/">http://opensource.apple.com/</a>.
919 1.1 mrg
920 1.1 mrg <p>This version of GCC requires at least cctools-590.36. The
921 1.1 mrg cctools-590.36 package referenced from
922 1.1 mrg <a href="http://gcc.gnu.org/ml/gcc/2006-03/msg00507.html">http://gcc.gnu.org/ml/gcc/2006-03/msg00507.html</a> will not work
923 1.1 mrg on systems older than 10.3.9 (aka darwin7.9.0).
924 1.1 mrg
925 1.1 mrg <p><hr />
926 1.1 mrg
927 1.3 mrg <h3 class="heading"><a name="TOC38"></a><a name="powerpc_002dx_002delf"></a>powerpc-*-elf</h3>
928 1.1 mrg
929 1.1 mrg <p>PowerPC system in big endian mode, running System V.4.
930 1.1 mrg
931 1.1 mrg <p><hr />
932 1.1 mrg
933 1.3 mrg <h3 class="heading"><a name="TOC39"></a><a name="powerpc_002dx_002dlinux_002dgnu"></a>powerpc*-*-linux-gnu*</h3>
934 1.1 mrg
935 1.1 mrg <p>PowerPC system in big endian mode running Linux.
936 1.1 mrg
937 1.1 mrg <p><hr />
938 1.1 mrg
939 1.3 mrg <h3 class="heading"><a name="TOC40"></a><a name="powerpc_002dx_002dnetbsd"></a>powerpc-*-netbsd*</h3>
940 1.1 mrg
941 1.1 mrg <p>PowerPC system in big endian mode running NetBSD.
942 1.1 mrg
943 1.1 mrg <p><hr />
944 1.1 mrg
945 1.3 mrg <h3 class="heading"><a name="TOC41"></a><a name="powerpc_002dx_002deabisim"></a>powerpc-*-eabisim</h3>
946 1.1 mrg
947 1.1 mrg <p>Embedded PowerPC system in big endian mode for use in running under the
948 1.1 mrg PSIM simulator.
949 1.1 mrg
950 1.1 mrg <p><hr />
951 1.1 mrg
952 1.3 mrg <h3 class="heading"><a name="TOC42"></a><a name="powerpc_002dx_002deabi"></a>powerpc-*-eabi</h3>
953 1.1 mrg
954 1.1 mrg <p>Embedded PowerPC system in big endian mode.
955 1.1 mrg
956 1.1 mrg <p><hr />
957 1.1 mrg
958 1.3 mrg <h3 class="heading"><a name="TOC43"></a><a name="powerpcle_002dx_002delf"></a>powerpcle-*-elf</h3>
959 1.1 mrg
960 1.1 mrg <p>PowerPC system in little endian mode, running System V.4.
961 1.1 mrg
962 1.1 mrg <p><hr />
963 1.1 mrg
964 1.3 mrg <h3 class="heading"><a name="TOC44"></a><a name="powerpcle_002dx_002deabisim"></a>powerpcle-*-eabisim</h3>
965 1.1 mrg
966 1.1 mrg <p>Embedded PowerPC system in little endian mode for use in running under
967 1.1 mrg the PSIM simulator.
968 1.1 mrg
969 1.1 mrg <p><hr />
970 1.1 mrg
971 1.3 mrg <h3 class="heading"><a name="TOC45"></a><a name="powerpcle_002dx_002deabi"></a>powerpcle-*-eabi</h3>
972 1.1 mrg
973 1.1 mrg <p>Embedded PowerPC system in little endian mode.
974 1.1 mrg
975 1.1 mrg <p><hr />
976 1.1 mrg
977 1.3 mrg <h3 class="heading"><a name="TOC46"></a><a name="rl78_002dx_002delf"></a>rl78-*-elf</h3>
978 1.3 mrg
979 1.3 mrg <p>The Renesas RL78 processor.
980 1.3 mrg This configuration is intended for embedded systems.
981 1.3 mrg
982 1.3 mrg <p><hr />
983 1.3 mrg
984 1.3 mrg <h3 class="heading"><a name="TOC47"></a><a name="rx_002dx_002delf"></a>rx-*-elf</h3>
985 1.1 mrg
986 1.1 mrg <p>The Renesas RX processor. See
987 1.1 mrg <a href="http://eu.renesas.com/fmwk.jsp?cnt=rx600_series_landing.jsp&fp=/products/mpumcu/rx_family/rx600_series">http://eu.renesas.com/fmwk.jsp?cnt=rx600_series_landing.jsp&fp=/products/mpumcu/rx_family/rx600_series</a>
988 1.1 mrg for more information about this processor.
989 1.1 mrg
990 1.1 mrg <p><hr />
991 1.1 mrg
992 1.3 mrg <h3 class="heading"><a name="TOC48"></a><a name="s390_002dx_002dlinux"></a>s390-*-linux*</h3>
993 1.1 mrg
994 1.1 mrg <p>S/390 system running GNU/Linux for S/390.
995 1.1 mrg
996 1.1 mrg <p><hr />
997 1.1 mrg
998 1.3 mrg <h3 class="heading"><a name="TOC49"></a><a name="s390x_002dx_002dlinux"></a>s390x-*-linux*</h3>
999 1.1 mrg
1000 1.1 mrg <p>zSeries system (64-bit) running GNU/Linux for zSeries.
1001 1.1 mrg
1002 1.1 mrg <p><hr />
1003 1.1 mrg
1004 1.3 mrg <h3 class="heading"><a name="TOC50"></a><a name="s390x_002dibm_002dtpf"></a>s390x-ibm-tpf*</h3>
1005 1.1 mrg
1006 1.1 mrg <p>zSeries system (64-bit) running TPF. This platform is
1007 1.1 mrg supported as cross-compilation target only.
1008 1.1 mrg
1009 1.1 mrg <p><hr /><!-- Please use Solaris 2 to refer to all release of Solaris, starting -->
1010 1.1 mrg <!-- with 2.0 until 2.6, 7, 8, etc. Solaris 1 was a marketing name for -->
1011 1.1 mrg <!-- SunOS 4 releases which we don't use to avoid confusion. Solaris -->
1012 1.1 mrg <!-- alone is too unspecific and must be avoided. -->
1013 1.1 mrg
1014 1.3 mrg <h3 class="heading"><a name="TOC51"></a><a name="x_002dx_002dsolaris2"></a>*-*-solaris2*</h3>
1015 1.3 mrg
1016 1.3 mrg <p>Support for Solaris 8 has removed in GCC 4.8. Support for Solaris 7 has
1017 1.3 mrg been removed in GCC 4.6.
1018 1.1 mrg
1019 1.3 mrg <p>Sun does not ship a C compiler with Solaris 2 before Solaris 10, though
1020 1.3 mrg you can download the Sun Studio compilers for free. In Solaris 10 and
1021 1.3 mrg 11, GCC 3.4.3 is available as <samp><span class="command">/usr/sfw/bin/gcc</span></samp>. Solaris 11
1022 1.3 mrg also provides GCC 4.5.2 as <samp><span class="command">/usr/gcc/4.5/bin/gcc</span></samp>. Alternatively,
1023 1.1 mrg you can install a pre-built GCC to bootstrap and install GCC. See the
1024 1.1 mrg <a href="binaries.html">binaries page</a> for details.
1025 1.1 mrg
1026 1.1 mrg <p>The Solaris 2 <samp><span class="command">/bin/sh</span></samp> will often fail to configure
1027 1.1 mrg ‘<samp><span class="samp">libstdc++-v3</span></samp>’, ‘<samp><span class="samp">boehm-gc</span></samp>’ or ‘<samp><span class="samp">libjava</span></samp>’. We therefore
1028 1.1 mrg recommend using the following initial sequence of commands
1029 1.1 mrg
1030 1.3 mrg <pre class="smallexample"> % CONFIG_SHELL=/bin/ksh
1031 1.3 mrg % export CONFIG_SHELL
1032 1.1 mrg </pre>
1033 1.1 mrg <p class="noindent">and proceed as described in <a href="configure.html">the configure instructions</a>.
1034 1.1 mrg In addition we strongly recommend specifying an absolute path to invoke
1035 1.1 mrg <samp><var>srcdir</var><span class="command">/configure</span></samp>.
1036 1.1 mrg
1037 1.1 mrg <p>Solaris 2 comes with a number of optional OS packages. Some of these
1038 1.1 mrg are needed to use GCC fully, namely <code>SUNWarc</code>,
1039 1.1 mrg <code>SUNWbtool</code>, <code>SUNWesu</code>, <code>SUNWhea</code>, <code>SUNWlibm</code>,
1040 1.1 mrg <code>SUNWsprot</code>, and <code>SUNWtoo</code>. If you did not install all
1041 1.1 mrg optional packages when installing Solaris 2, you will need to verify that
1042 1.1 mrg the packages that GCC needs are installed.
1043 1.1 mrg
1044 1.1 mrg <p>To check whether an optional package is installed, use
1045 1.1 mrg the <samp><span class="command">pkginfo</span></samp> command. To add an optional package, use the
1046 1.1 mrg <samp><span class="command">pkgadd</span></samp> command. For further details, see the Solaris 2
1047 1.1 mrg documentation.
1048 1.1 mrg
1049 1.1 mrg <p>Trying to use the linker and other tools in
1050 1.1 mrg <samp><span class="file">/usr/ucb</span></samp> to install GCC has been observed to cause trouble.
1051 1.1 mrg For example, the linker may hang indefinitely. The fix is to remove
1052 1.1 mrg <samp><span class="file">/usr/ucb</span></samp> from your <samp><span class="env">PATH</span></samp>.
1053 1.1 mrg
1054 1.1 mrg <p>The build process works more smoothly with the legacy Sun tools so, if you
1055 1.1 mrg have <samp><span class="file">/usr/xpg4/bin</span></samp> in your <samp><span class="env">PATH</span></samp>, we recommend that you place
1056 1.1 mrg <samp><span class="file">/usr/bin</span></samp> before <samp><span class="file">/usr/xpg4/bin</span></samp> for the duration of the build.
1057 1.1 mrg
1058 1.1 mrg <p>We recommend the use of the Sun assembler or the GNU assembler, in
1059 1.1 mrg conjunction with the Sun linker. The GNU <samp><span class="command">as</span></samp>
1060 1.1 mrg versions included in Solaris 10, from GNU binutils 2.15, and Solaris 11,
1061 1.1 mrg from GNU binutils 2.19, are known to work. They can be found in
1062 1.3 mrg <samp><span class="file">/usr/sfw/bin/gas</span></samp>. Current versions of GNU binutils (2.22)
1063 1.1 mrg are known to work as well. Note that your mileage may vary
1064 1.1 mrg if you use a combination of the GNU tools and the Sun tools: while the
1065 1.1 mrg combination GNU <samp><span class="command">as</span></samp> + Sun <samp><span class="command">ld</span></samp> should reasonably work,
1066 1.3 mrg the reverse combination Sun <samp><span class="command">as</span></samp> + GNU <samp><span class="command">ld</span></samp> may fail to
1067 1.3 mrg build or cause memory corruption at runtime in some cases for C++ programs.
1068 1.1 mrg <!-- FIXME: still? -->
1069 1.1 mrg GNU <samp><span class="command">ld</span></samp> usually works as well, although the version included in
1070 1.1 mrg Solaris 10 cannot be used due to several bugs. Again, the current
1071 1.3 mrg version (2.22) is known to work, but generally lacks platform specific
1072 1.3 mrg features, so better stay with Sun <samp><span class="command">ld</span></samp>. To use the LTO linker
1073 1.3 mrg plugin (<samp><span class="option">-fuse-linker-plugin</span></samp>) with GNU <samp><span class="command">ld</span></samp>, GNU
1074 1.3 mrg binutils <em>must</em> be configured with <samp><span class="option">--enable-largefile</span></samp>.
1075 1.3 mrg
1076 1.3 mrg <p>To enable symbol versioning in ‘<samp><span class="samp">libstdc++</span></samp>’ with Sun <samp><span class="command">ld</span></samp>,
1077 1.3 mrg you need to have any version of GNU <samp><span class="command">c++filt</span></samp>, which is part of
1078 1.3 mrg GNU binutils. ‘<samp><span class="samp">libstdc++</span></samp>’ symbol versioning will be disabled if no
1079 1.3 mrg appropriate version is found. Sun <samp><span class="command">c++filt</span></samp> from the Sun Studio
1080 1.3 mrg compilers does <em>not</em> work.
1081 1.1 mrg
1082 1.1 mrg <p>Sun bug 4296832 turns up when compiling X11 headers with GCC 2.95 or
1083 1.1 mrg newer: <samp><span class="command">g++</span></samp> will complain that types are missing. These headers
1084 1.1 mrg assume that omitting the type means <code>int</code>; this assumption worked for
1085 1.1 mrg C90 but is wrong for C++, and is now wrong for C99 also.
1086 1.1 mrg
1087 1.1 mrg <p>Sun bug 4927647 sometimes causes random spurious testsuite failures
1088 1.1 mrg related to missing diagnostic output. This bug doesn't affect GCC
1089 1.1 mrg itself, rather it is a kernel bug triggered by the <samp><span class="command">expect</span></samp>
1090 1.1 mrg program which is used only by the GCC testsuite driver. When the bug
1091 1.1 mrg causes the <samp><span class="command">expect</span></samp> program to miss anticipated output, extra
1092 1.1 mrg testsuite failures appear.
1093 1.1 mrg
1094 1.3 mrg <p>There are patches for Solaris 9 (117171-11 or newer for
1095 1.1 mrg SPARC, 117172-11 or newer for Intel) that address this problem.
1096 1.1 mrg
1097 1.3 mrg <p>Thread-local storage (TLS) is supported in Solaris 9, but requires
1098 1.3 mrg some patches. The ‘<samp><span class="samp">libthread</span></samp>’ patches provide the
1099 1.3 mrg <code>__tls_get_addr</code> (SPARC, 64-bit x86) resp. <code>___tls_get_addr</code>
1100 1.3 mrg (32-bit x86) functions. On Solaris 9, the necessary support
1101 1.3 mrg on SPARC is present since FCS, while 114432-05 or newer is required on
1102 1.3 mrg Intel. Additionally, on Solaris 9/x86, patch 113986-02 or newer is
1103 1.3 mrg required for the Sun <samp><span class="command">ld</span></samp> and runtime linker (<samp><span class="command">ld.so.1</span></samp>)
1104 1.3 mrg support, while Solaris 9/SPARC works since FCS. The linker
1105 1.3 mrg patches must be installed even if GNU <samp><span class="command">ld</span></samp> is used. Sun
1106 1.3 mrg <samp><span class="command">as</span></samp> in Solaris 9 doesn't support the necessary
1107 1.3 mrg relocations, so GNU <samp><span class="command">as</span></samp> must be used. The <samp><span class="command">configure</span></samp>
1108 1.3 mrg script checks for those prerequisites and automatically enables TLS
1109 1.3 mrg support if they are met. Although those minimal patch versions should
1110 1.3 mrg work, it is recommended to use the latest patch versions which include
1111 1.3 mrg additional bug fixes.
1112 1.3 mrg
1113 1.3 mrg <p><hr />
1114 1.3 mrg
1115 1.3 mrg <h3 class="heading"><a name="TOC52"></a><a name="sparc_002dx_002dx"></a>sparc*-*-*</h3>
1116 1.3 mrg
1117 1.3 mrg <p>This section contains general configuration information for all
1118 1.3 mrg SPARC-based platforms. In addition to reading this section, please
1119 1.3 mrg read all other sections that match your target.
1120 1.3 mrg
1121 1.3 mrg <p>Newer versions of the GNU Multiple Precision Library (GMP), the MPFR
1122 1.3 mrg library and the MPC library are known to be miscompiled by earlier
1123 1.3 mrg versions of GCC on these platforms. We therefore recommend the use
1124 1.3 mrg of the exact versions of these libraries listed as minimal versions
1125 1.3 mrg in <a href="prerequisites.html">the prerequisites</a>.
1126 1.3 mrg
1127 1.1 mrg <p><hr />
1128 1.1 mrg
1129 1.3 mrg <h3 class="heading"><a name="TOC53"></a><a name="sparc_002dsun_002dsolaris2"></a>sparc-sun-solaris2*</h3>
1130 1.1 mrg
1131 1.1 mrg <p>When GCC is configured to use GNU binutils 2.14 or later, the binaries
1132 1.1 mrg produced are smaller than the ones produced using Sun's native tools;
1133 1.1 mrg this difference is quite significant for binaries containing debugging
1134 1.1 mrg information.
1135 1.1 mrg
1136 1.1 mrg <p>Starting with Solaris 7, the operating system is capable of executing
1137 1.1 mrg 64-bit SPARC V9 binaries. GCC 3.1 and later properly supports
1138 1.1 mrg this; the <samp><span class="option">-m64</span></samp> option enables 64-bit code generation.
1139 1.1 mrg However, if all you want is code tuned for the UltraSPARC CPU, you
1140 1.1 mrg should try the <samp><span class="option">-mtune=ultrasparc</span></samp> option instead, which produces
1141 1.1 mrg code that, unlike full 64-bit code, can still run on non-UltraSPARC
1142 1.1 mrg machines.
1143 1.1 mrg
1144 1.1 mrg <p>When configuring on a Solaris 7 or later system that is running a kernel
1145 1.1 mrg that supports only 32-bit binaries, one must configure with
1146 1.1 mrg <samp><span class="option">--disable-multilib</span></samp>, since we will not be able to build the
1147 1.1 mrg 64-bit target libraries.
1148 1.1 mrg
1149 1.1 mrg <p>GCC 3.3 and GCC 3.4 trigger code generation bugs in earlier versions of
1150 1.1 mrg the GNU compiler (especially GCC 3.0.x versions), which lead to the
1151 1.1 mrg miscompilation of the stage1 compiler and the subsequent failure of the
1152 1.1 mrg bootstrap process. A workaround is to use GCC 3.2.3 as an intermediary
1153 1.1 mrg stage, i.e. to bootstrap that compiler with the base compiler and then
1154 1.1 mrg use it to bootstrap the final compiler.
1155 1.1 mrg
1156 1.1 mrg <p>GCC 3.4 triggers a code generation bug in versions 5.4 (Sun ONE Studio 7)
1157 1.1 mrg and 5.5 (Sun ONE Studio 8) of the Sun compiler, which causes a bootstrap
1158 1.1 mrg failure in form of a miscompilation of the stage1 compiler by the Sun
1159 1.1 mrg compiler. This is Sun bug 4974440. This is fixed with patch 112760-07.
1160 1.1 mrg
1161 1.1 mrg <p>GCC 3.4 changed the default debugging format from Stabs to DWARF-2 for
1162 1.1 mrg 32-bit code on Solaris 7 and later. If you use the Sun assembler, this
1163 1.1 mrg change apparently runs afoul of Sun bug 4910101 (which is referenced as
1164 1.1 mrg an x86-only problem by Sun, probably because they do not use DWARF-2).
1165 1.1 mrg A symptom of the problem is that you cannot compile C++ programs like
1166 1.1 mrg <samp><span class="command">groff</span></samp> 1.19.1 without getting messages similar to the following:
1167 1.1 mrg
1168 1.1 mrg <pre class="smallexample"> ld: warning: relocation error: R_SPARC_UA32: ...
1169 1.1 mrg external symbolic relocation against non-allocatable section
1170 1.1 mrg .debug_info cannot be processed at runtime: relocation ignored.
1171 1.1 mrg </pre>
1172 1.1 mrg <p class="noindent">To work around this problem, compile with <samp><span class="option">-gstabs+</span></samp> instead of
1173 1.1 mrg plain <samp><span class="option">-g</span></samp>.
1174 1.1 mrg
1175 1.3 mrg <p>When configuring the GNU Multiple Precision Library (GMP), the MPFR
1176 1.3 mrg library or the MPC library on a Solaris 7 or later system, the canonical
1177 1.3 mrg target triplet must be specified as the <samp><span class="command">build</span></samp> parameter on the
1178 1.3 mrg configure line. This target triplet can be obtained by invoking <samp><span class="command">./config.guess</span></samp> in the toplevel source directory of GCC (and
1179 1.3 mrg not that of GMP or MPFR or MPC). For example on a Solaris 9 system:
1180 1.1 mrg
1181 1.3 mrg <pre class="smallexample"> % ./configure --build=sparc-sun-solaris2.9 --prefix=xxx
1182 1.1 mrg </pre>
1183 1.1 mrg <p><hr />
1184 1.1 mrg
1185 1.3 mrg <h3 class="heading"><a name="TOC54"></a><a name="sparc_002dsun_002dsolaris210"></a>sparc-sun-solaris2.10</h3>
1186 1.1 mrg
1187 1.1 mrg <p>There is a bug in older versions of the Sun assembler which breaks
1188 1.1 mrg thread-local storage (TLS). A typical error message is
1189 1.1 mrg
1190 1.1 mrg <pre class="smallexample"> ld: fatal: relocation error: R_SPARC_TLS_LE_HIX22: file /var/tmp//ccamPA1v.o:
1191 1.1 mrg symbol <unknown>: bad symbol type SECT: symbol type must be TLS
1192 1.1 mrg </pre>
1193 1.1 mrg <p class="noindent">This bug is fixed in Sun patch 118683-03 or later.
1194 1.1 mrg
1195 1.1 mrg <p><hr />
1196 1.1 mrg
1197 1.3 mrg <h3 class="heading"><a name="TOC55"></a><a name="sparc_002dx_002dlinux"></a>sparc-*-linux*</h3>
1198 1.1 mrg
1199 1.1 mrg <p>GCC versions 3.0 and higher require binutils 2.11.2 and glibc 2.2.4
1200 1.1 mrg or newer on this platform. All earlier binutils and glibc
1201 1.1 mrg releases mishandled unaligned relocations on <code>sparc-*-*</code> targets.
1202 1.1 mrg
1203 1.1 mrg <p><hr />
1204 1.1 mrg
1205 1.3 mrg <h3 class="heading"><a name="TOC56"></a><a name="sparc64_002dx_002dsolaris2"></a>sparc64-*-solaris2*</h3>
1206 1.1 mrg
1207 1.3 mrg <p>When configuring the GNU Multiple Precision Library (GMP), the MPFR
1208 1.3 mrg library or the MPC library, the canonical target triplet must be specified
1209 1.3 mrg as the <samp><span class="command">build</span></samp> parameter on the configure line. For example
1210 1.3 mrg on a Solaris 9 system:
1211 1.1 mrg
1212 1.3 mrg <pre class="smallexample"> % ./configure --build=sparc64-sun-solaris2.9 --prefix=xxx
1213 1.1 mrg </pre>
1214 1.1 mrg <p>The following compiler flags must be specified in the configure
1215 1.1 mrg step in order to bootstrap this target with the Sun compiler:
1216 1.1 mrg
1217 1.3 mrg <pre class="smallexample"> % CC="cc -xarch=v9 -xildoff" <var>srcdir</var>/configure [<var>options</var>] [<var>target</var>]
1218 1.1 mrg </pre>
1219 1.1 mrg <p class="noindent"><samp><span class="option">-xarch=v9</span></samp> specifies the SPARC-V9 architecture to the Sun toolchain
1220 1.1 mrg and <samp><span class="option">-xildoff</span></samp> turns off the incremental linker.
1221 1.1 mrg
1222 1.1 mrg <p><hr />
1223 1.1 mrg
1224 1.3 mrg <h3 class="heading"><a name="TOC57"></a><a name="sparcv9_002dx_002dsolaris2"></a>sparcv9-*-solaris2*</h3>
1225 1.1 mrg
1226 1.1 mrg <p>This is a synonym for ‘<samp><span class="samp">sparc64-*-solaris2*</span></samp>’.
1227 1.1 mrg
1228 1.1 mrg <p><hr />
1229 1.1 mrg
1230 1.3 mrg <h3 class="heading"><a name="TOC58"></a><a name="c6x_002dx_002dx"></a>c6x-*-*</h3>
1231 1.3 mrg
1232 1.3 mrg <p>The C6X family of processors. This port requires binutils-2.22 or newer.
1233 1.3 mrg
1234 1.3 mrg <p><hr />
1235 1.3 mrg
1236 1.3 mrg <h3 class="heading"><a name="TOC59"></a><a name="tilegx_002d_002a_002dlinux"></a>tilegx-*-linux*</h3>
1237 1.3 mrg
1238 1.3 mrg <p>The TILE-Gx processor running GNU/Linux. This port requires
1239 1.3 mrg binutils-2.22 or newer.
1240 1.3 mrg
1241 1.3 mrg <p><hr />
1242 1.3 mrg
1243 1.3 mrg <h3 class="heading"><a name="TOC60"></a><a name="tilepro_002d_002a_002dlinux"></a>tilepro-*-linux*</h3>
1244 1.3 mrg
1245 1.3 mrg <p>The TILEPro processor running GNU/Linux. This port requires
1246 1.3 mrg binutils-2.22 or newer.
1247 1.3 mrg
1248 1.3 mrg <p><hr />
1249 1.3 mrg
1250 1.3 mrg <h3 class="heading"><a name="TOC61"></a><a name="x_002dx_002dvxworks"></a>*-*-vxworks*</h3>
1251 1.1 mrg
1252 1.1 mrg <p>Support for VxWorks is in flux. At present GCC supports <em>only</em> the
1253 1.1 mrg very recent VxWorks 5.5 (aka Tornado 2.2) release, and only on PowerPC.
1254 1.1 mrg We welcome patches for other architectures supported by VxWorks 5.5.
1255 1.1 mrg Support for VxWorks AE would also be welcome; we believe this is merely
1256 1.1 mrg a matter of writing an appropriate “configlette” (see below). We are
1257 1.1 mrg not interested in supporting older, a.out or COFF-based, versions of
1258 1.1 mrg VxWorks in GCC 3.
1259 1.1 mrg
1260 1.1 mrg <p>VxWorks comes with an older version of GCC installed in
1261 1.1 mrg <samp><var>$WIND_BASE</var><span class="file">/host</span></samp>; we recommend you do not overwrite it.
1262 1.1 mrg Choose an installation <var>prefix</var> entirely outside <var>$WIND_BASE</var>.
1263 1.1 mrg Before running <samp><span class="command">configure</span></samp>, create the directories <samp><var>prefix</var></samp>
1264 1.1 mrg and <samp><var>prefix</var><span class="file">/bin</span></samp>. Link or copy the appropriate assembler,
1265 1.1 mrg linker, etc. into <samp><var>prefix</var><span class="file">/bin</span></samp>, and set your <var>PATH</var> to
1266 1.1 mrg include that directory while running both <samp><span class="command">configure</span></samp> and
1267 1.1 mrg <samp><span class="command">make</span></samp>.
1268 1.1 mrg
1269 1.1 mrg <p>You must give <samp><span class="command">configure</span></samp> the
1270 1.1 mrg <samp><span class="option">--with-headers=</span><var>$WIND_BASE</var><span class="option">/target/h</span></samp> switch so that it can
1271 1.1 mrg find the VxWorks system headers. Since VxWorks is a cross compilation
1272 1.1 mrg target only, you must also specify <samp><span class="option">--target=</span><var>target</var></samp>.
1273 1.1 mrg <samp><span class="command">configure</span></samp> will attempt to create the directory
1274 1.1 mrg <samp><var>prefix</var><span class="file">/</span><var>target</var><span class="file">/sys-include</span></samp> and copy files into it;
1275 1.1 mrg make sure the user running <samp><span class="command">configure</span></samp> has sufficient privilege
1276 1.1 mrg to do so.
1277 1.1 mrg
1278 1.1 mrg <p>GCC's exception handling runtime requires a special “configlette”
1279 1.1 mrg module, <samp><span class="file">contrib/gthr_supp_vxw_5x.c</span></samp>. Follow the instructions in
1280 1.1 mrg that file to add the module to your kernel build. (Future versions of
1281 1.1 mrg VxWorks will incorporate this module.)
1282 1.1 mrg
1283 1.1 mrg <p><hr />
1284 1.1 mrg
1285 1.3 mrg <h3 class="heading"><a name="TOC62"></a><a name="x86_002d64_002dx_002dx"></a>x86_64-*-*, amd64-*-*</h3>
1286 1.1 mrg
1287 1.1 mrg <p>GCC supports the x86-64 architecture implemented by the AMD64 processor
1288 1.1 mrg (amd64-*-* is an alias for x86_64-*-*) on GNU/Linux, FreeBSD and NetBSD.
1289 1.1 mrg On GNU/Linux the default is a bi-arch compiler which is able to generate
1290 1.1 mrg both 64-bit x86-64 and 32-bit x86 code (via the <samp><span class="option">-m32</span></samp> switch).
1291 1.1 mrg
1292 1.1 mrg <p><hr />
1293 1.1 mrg
1294 1.3 mrg <h3 class="heading"><a name="TOC63"></a><a name="x86_002d64_002dx_002dsolaris210"></a>x86_64-*-solaris2.1[0-9]*</h3>
1295 1.3 mrg
1296 1.3 mrg <p>GCC also supports the x86-64 architecture implemented by the AMD64
1297 1.3 mrg processor (‘<samp><span class="samp">amd64-*-*</span></samp>’ is an alias for ‘<samp><span class="samp">x86_64-*-*</span></samp>’) on
1298 1.3 mrg Solaris 10 or later. Unlike other systems, without special options a
1299 1.3 mrg bi-arch compiler is built which generates 32-bit code by default, but
1300 1.3 mrg can generate 64-bit x86-64 code with the <samp><span class="option">-m64</span></samp> switch. Since
1301 1.3 mrg GCC 4.7, there is also configuration that defaults to 64-bit code, but
1302 1.3 mrg can generate 32-bit code with <samp><span class="option">-m32</span></samp>. To configure and build
1303 1.3 mrg this way, you have to provide all support libraries like <samp><span class="file">libgmp</span></samp>
1304 1.3 mrg as 64-bit code, configure with <samp><span class="option">--target=x86_64-pc-solaris2.1x</span></samp>
1305 1.3 mrg and ‘<samp><span class="samp">CC=gcc -m64</span></samp>’.
1306 1.3 mrg
1307 1.3 mrg <p><hr />
1308 1.3 mrg
1309 1.3 mrg <h3 class="heading"><a name="TOC64"></a><a name="xtensa_002dx_002delf"></a>xtensa*-*-elf</h3>
1310 1.1 mrg
1311 1.1 mrg <p>This target is intended for embedded Xtensa systems using the
1312 1.1 mrg ‘<samp><span class="samp">newlib</span></samp>’ C library. It uses ELF but does not support shared
1313 1.1 mrg objects. Designed-defined instructions specified via the
1314 1.1 mrg Tensilica Instruction Extension (TIE) language are only supported
1315 1.1 mrg through inline assembly.
1316 1.1 mrg
1317 1.1 mrg <p>The Xtensa configuration information must be specified prior to
1318 1.1 mrg building GCC. The <samp><span class="file">include/xtensa-config.h</span></samp> header
1319 1.1 mrg file contains the configuration information. If you created your
1320 1.1 mrg own Xtensa configuration with the Xtensa Processor Generator, the
1321 1.1 mrg downloaded files include a customized copy of this header file,
1322 1.1 mrg which you can use to replace the default header file.
1323 1.1 mrg
1324 1.1 mrg <p><hr />
1325 1.1 mrg
1326 1.3 mrg <h3 class="heading"><a name="TOC65"></a><a name="xtensa_002dx_002dlinux"></a>xtensa*-*-linux*</h3>
1327 1.1 mrg
1328 1.1 mrg <p>This target is for Xtensa systems running GNU/Linux. It supports ELF
1329 1.1 mrg shared objects and the GNU C library (glibc). It also generates
1330 1.1 mrg position-independent code (PIC) regardless of whether the
1331 1.1 mrg <samp><span class="option">-fpic</span></samp> or <samp><span class="option">-fPIC</span></samp> options are used. In other
1332 1.1 mrg respects, this target is the same as the
1333 1.1 mrg <a href="#xtensa*-*-elf">‘<samp><span class="samp">xtensa*-*-elf</span></samp>’</a> target.
1334 1.1 mrg
1335 1.1 mrg <p><hr />
1336 1.1 mrg
1337 1.3 mrg <h3 class="heading"><a name="TOC66"></a><a name="windows"></a>Microsoft Windows</h3>
1338 1.1 mrg
1339 1.3 mrg <h4 class="subheading"><a name="TOC67"></a>Intel 16-bit versions</h4>
1340 1.1 mrg
1341 1.1 mrg <p>The 16-bit versions of Microsoft Windows, such as Windows 3.1, are not
1342 1.1 mrg supported.
1343 1.1 mrg
1344 1.1 mrg <p>However, the 32-bit port has limited support for Microsoft
1345 1.1 mrg Windows 3.11 in the Win32s environment, as a target only. See below.
1346 1.1 mrg
1347 1.3 mrg <h4 class="subheading"><a name="TOC68"></a>Intel 32-bit versions</h4>
1348 1.1 mrg
1349 1.1 mrg <p>The 32-bit versions of Windows, including Windows 95, Windows NT, Windows
1350 1.1 mrg XP, and Windows Vista, are supported by several different target
1351 1.1 mrg platforms. These targets differ in which Windows subsystem they target
1352 1.1 mrg and which C libraries are used.
1353 1.1 mrg
1354 1.1 mrg <ul>
1355 1.1 mrg <li>Cygwin <a href="#x-x-cygwin">*-*-cygwin</a>: Cygwin provides a user-space
1356 1.1 mrg Linux API emulation layer in the Win32 subsystem.
1357 1.1 mrg <li>Interix <a href="#x-x-interix">*-*-interix</a>: The Interix subsystem
1358 1.1 mrg provides native support for POSIX.
1359 1.1 mrg <li>MinGW <a href="#x-x-mingw32">*-*-mingw32</a>: MinGW is a native GCC port for
1360 1.1 mrg the Win32 subsystem that provides a subset of POSIX.
1361 1.1 mrg <li>MKS i386-pc-mks: NuTCracker from MKS. See
1362 1.1 mrg <a href="http://www.mkssoftware.com/">http://www.mkssoftware.com/</a> for more information.
1363 1.1 mrg </ul>
1364 1.1 mrg
1365 1.3 mrg <h4 class="subheading"><a name="TOC69"></a>Intel 64-bit versions</h4>
1366 1.1 mrg
1367 1.1 mrg <p>GCC contains support for x86-64 using the mingw-w64
1368 1.1 mrg runtime library, available from <a href="http://mingw-w64.sourceforge.net/">http://mingw-w64.sourceforge.net/</a>.
1369 1.1 mrg This library should be used with the target triple x86_64-pc-mingw32.
1370 1.1 mrg
1371 1.1 mrg <p>Presently Windows for Itanium is not supported.
1372 1.1 mrg
1373 1.3 mrg <h4 class="subheading"><a name="TOC70"></a>Windows CE</h4>
1374 1.1 mrg
1375 1.3 mrg <p>Windows CE is supported as a target only on Hitachi
1376 1.1 mrg SuperH (sh-wince-pe), and MIPS (mips-wince-pe).
1377 1.1 mrg
1378 1.3 mrg <h4 class="subheading"><a name="TOC71"></a>Other Windows Platforms</h4>
1379 1.1 mrg
1380 1.1 mrg <p>GCC no longer supports Windows NT on the Alpha or PowerPC.
1381 1.1 mrg
1382 1.1 mrg <p>GCC no longer supports the Windows POSIX subsystem. However, it does
1383 1.1 mrg support the Interix subsystem. See above.
1384 1.1 mrg
1385 1.1 mrg <p>Old target names including *-*-winnt and *-*-windowsnt are no longer used.
1386 1.1 mrg
1387 1.1 mrg <p>PW32 (i386-pc-pw32) support was never completed, and the project seems to
1388 1.1 mrg be inactive. See <a href="http://pw32.sourceforge.net/">http://pw32.sourceforge.net/</a> for more information.
1389 1.1 mrg
1390 1.1 mrg <p>UWIN support has been removed due to a lack of maintenance.
1391 1.1 mrg
1392 1.1 mrg <p><hr />
1393 1.1 mrg
1394 1.3 mrg <h3 class="heading"><a name="TOC72"></a><a name="x_002dx_002dcygwin"></a>*-*-cygwin</h3>
1395 1.1 mrg
1396 1.1 mrg <p>Ports of GCC are included with the
1397 1.1 mrg <a href="http://www.cygwin.com/">Cygwin environment</a>.
1398 1.1 mrg
1399 1.1 mrg <p>GCC will build under Cygwin without modification; it does not build
1400 1.1 mrg with Microsoft's C++ compiler and there are no plans to make it do so.
1401 1.1 mrg
1402 1.1 mrg <p>The Cygwin native compiler can be configured to target any 32-bit x86
1403 1.1 mrg cpu architecture desired; the default is i686-pc-cygwin. It should be
1404 1.1 mrg used with as up-to-date a version of binutils as possible; use either
1405 1.1 mrg the latest official GNU binutils release in the Cygwin distribution,
1406 1.1 mrg or version 2.20 or above if building your own.
1407 1.1 mrg
1408 1.1 mrg <p><hr />
1409 1.1 mrg
1410 1.3 mrg <h3 class="heading"><a name="TOC73"></a><a name="x_002dx_002dinterix"></a>*-*-interix</h3>
1411 1.1 mrg
1412 1.1 mrg <p>The Interix target is used by OpenNT, Interix, Services For UNIX (SFU),
1413 1.1 mrg and Subsystem for UNIX-based Applications (SUA). Applications compiled
1414 1.1 mrg with this target run in the Interix subsystem, which is separate from
1415 1.1 mrg the Win32 subsystem. This target was last known to work in GCC 3.3.
1416 1.1 mrg
1417 1.1 mrg <p><hr />
1418 1.1 mrg
1419 1.3 mrg <h3 class="heading"><a name="TOC74"></a><a name="x_002dx_002dmingw32"></a>*-*-mingw32</h3>
1420 1.1 mrg
1421 1.1 mrg <p>GCC will build with and support only MinGW runtime 3.12 and later.
1422 1.1 mrg Earlier versions of headers are incompatible with the new default semantics
1423 1.1 mrg of <code>extern inline</code> in <code>-std=c99</code> and <code>-std=gnu99</code> modes.
1424 1.1 mrg
1425 1.1 mrg <p><hr />
1426 1.1 mrg
1427 1.3 mrg <h3 class="heading"><a name="TOC75"></a><a name="older"></a>Older systems</h3>
1428 1.1 mrg
1429 1.1 mrg <p>GCC contains support files for many older (1980s and early
1430 1.1 mrg 1990s) Unix variants. For the most part, support for these systems
1431 1.1 mrg has not been deliberately removed, but it has not been maintained for
1432 1.1 mrg several years and may suffer from bitrot.
1433 1.1 mrg
1434 1.1 mrg <p>Starting with GCC 3.1, each release has a list of “obsoleted” systems.
1435 1.1 mrg Support for these systems is still present in that release, but
1436 1.1 mrg <samp><span class="command">configure</span></samp> will fail unless the <samp><span class="option">--enable-obsolete</span></samp>
1437 1.1 mrg option is given. Unless a maintainer steps forward, support for these
1438 1.1 mrg systems will be removed from the next release of GCC.
1439 1.1 mrg
1440 1.1 mrg <p>Support for old systems as hosts for GCC can cause problems if the
1441 1.1 mrg workarounds for compiler, library and operating system bugs affect the
1442 1.1 mrg cleanliness or maintainability of the rest of GCC. In some cases, to
1443 1.1 mrg bring GCC up on such a system, if still possible with current GCC, may
1444 1.1 mrg require first installing an old version of GCC which did work on that
1445 1.1 mrg system, and using it to compile a more recent GCC, to avoid bugs in the
1446 1.1 mrg vendor compiler. Old releases of GCC 1 and GCC 2 are available in the
1447 1.1 mrg <samp><span class="file">old-releases</span></samp> directory on the <a href="../mirrors.html">GCC mirror sites</a>. Header bugs may generally be avoided using
1448 1.1 mrg <samp><span class="command">fixincludes</span></samp>, but bugs or deficiencies in libraries and the
1449 1.1 mrg operating system may still cause problems.
1450 1.1 mrg
1451 1.1 mrg <p>Support for older systems as targets for cross-compilation is less
1452 1.1 mrg problematic than support for them as hosts for GCC; if an enthusiast
1453 1.1 mrg wishes to make such a target work again (including resurrecting any of
1454 1.1 mrg the targets that never worked with GCC 2, starting from the last
1455 1.1 mrg version before they were removed), patches
1456 1.1 mrg <a href="../contribute.html">following the usual requirements</a> would be
1457 1.1 mrg likely to be accepted, since they should not affect the support for more
1458 1.1 mrg modern targets.
1459 1.1 mrg
1460 1.1 mrg <p>For some systems, old versions of GNU binutils may also be useful,
1461 1.1 mrg and are available from <samp><span class="file">pub/binutils/old-releases</span></samp> on
1462 1.1 mrg <a href="http://sourceware.org/mirrors.html">sourceware.org mirror sites</a>.
1463 1.1 mrg
1464 1.1 mrg <p>Some of the information on specific systems above relates to
1465 1.1 mrg such older systems, but much of the information
1466 1.1 mrg about GCC on such systems (which may no longer be applicable to
1467 1.1 mrg current GCC) is to be found in the GCC texinfo manual.
1468 1.1 mrg
1469 1.1 mrg <p><hr />
1470 1.1 mrg
1471 1.3 mrg <h3 class="heading"><a name="TOC76"></a><a name="elf"></a>all ELF targets (SVR4, Solaris 2, etc.)</h3>
1472 1.1 mrg
1473 1.1 mrg <p>C++ support is significantly better on ELF targets if you use the
1474 1.1 mrg <a href="./configure.html#with-gnu-ld">GNU linker</a>; duplicate copies of
1475 1.1 mrg inlines, vtables and template instantiations will be discarded
1476 1.1 mrg automatically.
1477 1.1 mrg
1478 1.1 mrg <p><hr />
1479 1.1 mrg <p><a href="./index.html">Return to the GCC Installation page</a>
1480 1.1 mrg
1481 1.1 mrg <!-- ***Old documentation****************************************************** -->
1482 1.1 mrg <!-- ***GFDL******************************************************************** -->
1483 1.1 mrg <!-- *************************************************************************** -->
1484 1.1 mrg <!-- Part 6 The End of the Document -->
1485 1.1 mrg </body></html>
1486 1.1 mrg
1487