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