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42 1.10 mrg <h1 class="settitle">Host/Target specific installation notes for GCC</h1>
43 1.10 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 1.10 mrg Please read this document carefully <em>before</em> installing the
45 1.10 mrg GNU Compiler Collection on your machine.
46 1.8 mrg
47 1.10 mrg <p>Note that this list of install notes is <em>not</em> a list of supported
48 1.10 mrg hosts or targets. Not all supported hosts and targets are listed
49 1.10 mrg here, only the ones that require host-specific or target-specific
50 1.10 mrg information have to.
51 1.8 mrg
52 1.10 mrg <ul>
53 1.10 mrg <li><a href="#aarch64-x-x">aarch64*-*-*</a>
54 1.10 mrg <li><a href="#alpha-x-x">alpha*-*-*</a>
55 1.10 mrg <li><a href="#alpha-dec-osf51">alpha*-dec-osf5.1</a>
56 1.10 mrg <li><a href="#amd64-x-solaris210">amd64-*-solaris2.10</a>
57 1.10 mrg <li><a href="#arm-x-eabi">arm-*-eabi</a>
58 1.10 mrg <li><a href="#avr">avr</a>
59 1.10 mrg <li><a href="#bfin">Blackfin</a>
60 1.10 mrg <li><a href="#dos">DOS</a>
61 1.10 mrg <li><a href="#x-x-freebsd">*-*-freebsd*</a>
62 1.10 mrg <li><a href="#h8300-hms">h8300-hms</a>
63 1.10 mrg <li><a href="#hppa-hp-hpux">hppa*-hp-hpux*</a>
64 1.10 mrg <li><a href="#hppa-hp-hpux10">hppa*-hp-hpux10</a>
65 1.10 mrg <li><a href="#hppa-hp-hpux11">hppa*-hp-hpux11</a>
66 1.10 mrg <li><a href="#x-x-linux-gnu">*-*-linux-gnu</a>
67 1.10 mrg <li><a href="#ix86-x-linux">i?86-*-linux*</a>
68 1.10 mrg <li><a href="#ix86-x-solaris210">i?86-*-solaris2.10</a>
69 1.10 mrg <li><a href="#ia64-x-linux">ia64-*-linux</a>
70 1.10 mrg <li><a href="#ia64-x-hpux">ia64-*-hpux*</a>
71 1.10 mrg <li><a href="#x-ibm-aix">*-ibm-aix*</a>
72 1.10 mrg <li><a href="#iq2000-x-elf">iq2000-*-elf</a>
73 1.10 mrg <li><a href="#lm32-x-elf">lm32-*-elf</a>
74 1.10 mrg <li><a href="#lm32-x-uclinux">lm32-*-uclinux</a>
75 1.10 mrg <li><a href="#m32c-x-elf">m32c-*-elf</a>
76 1.10 mrg <li><a href="#m32r-x-elf">m32r-*-elf</a>
77 1.10 mrg <li><a href="#m68k-x-x">m68k-*-*</a>
78 1.10 mrg <li><a href="#m68k-uclinux">m68k-uclinux</a>
79 1.10 mrg <li><a href="#microblaze-x-elf">microblaze-*-elf</a>
80 1.10 mrg <li><a href="#mips-x-x">mips-*-*</a>
81 1.10 mrg <li><a href="#mips-sgi-irix5">mips-sgi-irix5</a>
82 1.10 mrg <li><a href="#mips-sgi-irix6">mips-sgi-irix6</a>
83 1.10 mrg <li><a href="#nds32le-x-elf">nds32le-*-elf</a>
84 1.10 mrg <li><a href="#nds32be-x-elf">nds32be-*-elf</a>
85 1.10 mrg <li><a href="#nvptx-x-none">nvptx-*-none</a>
86 1.10 mrg <li><a href="#powerpc-x-x">powerpc*-*-*</a>
87 1.10 mrg <li><a href="#powerpc-x-darwin">powerpc-*-darwin*</a>
88 1.10 mrg <li><a href="#powerpc-x-elf">powerpc-*-elf</a>
89 1.10 mrg <li><a href="#powerpc-x-linux-gnu">powerpc*-*-linux-gnu*</a>
90 1.10 mrg <li><a href="#powerpc-x-netbsd">powerpc-*-netbsd*</a>
91 1.10 mrg <li><a href="#powerpc-x-eabisim">powerpc-*-eabisim</a>
92 1.10 mrg <li><a href="#powerpc-x-eabi">powerpc-*-eabi</a>
93 1.10 mrg <li><a href="#powerpcle-x-elf">powerpcle-*-elf</a>
94 1.10 mrg <li><a href="#powerpcle-x-eabisim">powerpcle-*-eabisim</a>
95 1.10 mrg <li><a href="#powerpcle-x-eabi">powerpcle-*-eabi</a>
96 1.10 mrg <li><a href="#riscv32-x-elf">riscv32-*-elf</a>
97 1.10 mrg <li><a href="#riscv32-x-linux">riscv32-*-linux</a>
98 1.10 mrg <li><a href="#riscv64-x-elf">riscv64-*-elf</a>
99 1.10 mrg <li><a href="#riscv64-x-linux">riscv64-*-linux</a>
100 1.10 mrg <li><a href="#s390-x-linux">s390-*-linux*</a>
101 1.10 mrg <li><a href="#s390x-x-linux">s390x-*-linux*</a>
102 1.10 mrg <li><a href="#s390x-ibm-tpf">s390x-ibm-tpf*</a>
103 1.10 mrg <li><a href="#x-x-solaris2">*-*-solaris2*</a>
104 1.10 mrg <li><a href="#sparc-x-x">sparc*-*-*</a>
105 1.10 mrg <li><a href="#sparc-sun-solaris2">sparc-sun-solaris2*</a>
106 1.10 mrg <li><a href="#sparc-sun-solaris210">sparc-sun-solaris2.10</a>
107 1.10 mrg <li><a href="#sparc-x-linux">sparc-*-linux*</a>
108 1.10 mrg <li><a href="#sparc64-x-solaris2">sparc64-*-solaris2*</a>
109 1.10 mrg <li><a href="#sparcv9-x-solaris2">sparcv9-*-solaris2*</a>
110 1.10 mrg <li><a href="#c6x-x-x">c6x-*-*</a>
111 1.10 mrg <li><a href="#tilegx-x-linux">tilegx-*-linux*</a>
112 1.10 mrg <li><a href="#tilegxbe-x-linux">tilegxbe-*-linux*</a>
113 1.10 mrg <li><a href="#tilepro-x-linux">tilepro-*-linux*</a>
114 1.10 mrg <li><a href="#visium-x-elf">visium-*-elf</a>
115 1.10 mrg <li><a href="#x-x-vxworks">*-*-vxworks*</a>
116 1.10 mrg <li><a href="#x86-64-x-x">x86_64-*-*</a> amd64-*-*
117 1.10 mrg <li><a href="#x86-64-x-solaris210">x86_64-*-solaris2.1[0-9]*</a>
118 1.10 mrg <li><a href="#xtensa-x-elf">xtensa*-*-elf</a>
119 1.10 mrg <li><a href="#xtensa-x-linux">xtensa*-*-linux*</a>
120 1.10 mrg <li><a href="#windows">Microsoft Windows</a>
121 1.10 mrg <li><a href="#x-x-cygwin">*-*-cygwin</a>
122 1.10 mrg <li><a href="#x-x-mingw32">*-*-mingw32</a>
123 1.10 mrg <li><a href="#os2">OS/2</a>
124 1.10 mrg <li><a href="#older">Older systems</a>
125 1.10 mrg </ul>
126 1.10 mrg
127 1.10 mrg <ul>
128 1.10 mrg <li><a href="#elf">all ELF targets</a> (SVR4, Solaris 2, etc.)
129 1.10 mrg </ul>
130 1.8 mrg
131 1.10 mrg <p><!-- -------- host/target specific issues start here ---------------- -->
132 1.10 mrg <hr /><a name="aarch64-x-x"></a>
133 1.6 mrg
134 1.10 mrg <h3 class="heading"><a name="TOC0"></a>aarch64*-*-*</h3>
135 1.8 mrg
136 1.10 mrg <p>Binutils pre 2.24 does not have support for selecting <samp><span class="option">-mabi</span></samp> and
137 1.10 mrg does not support ILP32. If it is used to build GCC 4.9 or later, GCC will
138 1.10 mrg not support option <samp><span class="option">-mabi=ilp32</span></samp>.
139 1.8 mrg
140 1.10 mrg <p>To enable a workaround for the Cortex-A53 erratum number 835769 by default
141 1.10 mrg (for all CPUs regardless of -mcpu option given) at configure time use the
142 1.10 mrg <samp><span class="option">--enable-fix-cortex-a53-835769</span></samp> option. This will enable the fix by
143 1.10 mrg default and can be explicitly disabled during compilation by passing the
144 1.10 mrg <samp><span class="option">-mno-fix-cortex-a53-835769</span></samp> option. Conversely,
145 1.10 mrg <samp><span class="option">--disable-fix-cortex-a53-835769</span></samp> will disable the workaround by
146 1.10 mrg default. The workaround is disabled by default if neither of
147 1.10 mrg <samp><span class="option">--enable-fix-cortex-a53-835769</span></samp> or
148 1.10 mrg <samp><span class="option">--disable-fix-cortex-a53-835769</span></samp> is given at configure time.
149 1.8 mrg
150 1.10 mrg <p>To enable a workaround for the Cortex-A53 erratum number 843419 by default
151 1.10 mrg (for all CPUs regardless of -mcpu option given) at configure time use the
152 1.10 mrg <samp><span class="option">--enable-fix-cortex-a53-843419</span></samp> option. This workaround is applied at
153 1.10 mrg link time. Enabling the workaround will cause GCC to pass the relevant option
154 1.10 mrg to the linker. It can be explicitly disabled during compilation by passing the
155 1.10 mrg <samp><span class="option">-mno-fix-cortex-a53-843419</span></samp> option. Conversely,
156 1.10 mrg <samp><span class="option">--disable-fix-cortex-a53-843419</span></samp> will disable the workaround by default.
157 1.10 mrg The workaround is disabled by default if neither of
158 1.10 mrg <samp><span class="option">--enable-fix-cortex-a53-843419</span></samp> or
159 1.10 mrg <samp><span class="option">--disable-fix-cortex-a53-843419</span></samp> is given at configure time.
160 1.8 mrg
161 1.10 mrg <p><hr /><a name="alpha-x-x"></a>
162 1.8 mrg
163 1.10 mrg <h3 class="heading"><a name="TOC1"></a>alpha*-*-*</h3>
164 1.8 mrg
165 1.10 mrg <p>This section contains general configuration information for all
166 1.10 mrg alpha-based platforms using ELF (in particular, ignore this section for
167 1.10 mrg DEC OSF/1, Digital UNIX and Tru64 UNIX). In addition to reading this
168 1.10 mrg section, please read all other sections that match your target.
169 1.8 mrg
170 1.10 mrg <p>We require binutils 2.11.2 or newer.
171 1.10 mrg Previous binutils releases had a number of problems with DWARF 2
172 1.10 mrg debugging information, not the least of which is incorrect linking of
173 1.10 mrg shared libraries.
174 1.8 mrg
175 1.10 mrg <p><hr /><a name="alpha-dec-osf51"></a>
176 1.8 mrg
177 1.10 mrg <h3 class="heading"><a name="TOC2"></a>alpha*-dec-osf5.1</h3>
178 1.8 mrg
179 1.10 mrg <p>Systems using processors that implement the DEC Alpha architecture and
180 1.10 mrg are running the DEC/Compaq/HP Unix (DEC OSF/1, Digital UNIX, or Compaq/HP
181 1.10 mrg Tru64 UNIX) operating system, for example the DEC Alpha AXP systems.
182 1.8 mrg
183 1.10 mrg <p>Support for Tru64 UNIX V5.1 has been removed in GCC 4.8. As of GCC 4.6,
184 1.10 mrg support for Tru64 UNIX V4.0 and V5.0 has been removed. As of GCC 3.2,
185 1.10 mrg versions before <code>alpha*-dec-osf4</code> are no longer supported. (These
186 1.10 mrg are the versions which identify themselves as DEC OSF/1.)
187 1.8 mrg
188 1.10 mrg <p><hr /><a name="amd64-x-solaris210"></a>
189 1.8 mrg
190 1.10 mrg <h3 class="heading"><a name="TOC3"></a>amd64-*-solaris2.1[0-9]*</h3>
191 1.8 mrg
192 1.10 mrg <p>This is a synonym for ‘<samp><span class="samp">x86_64-*-solaris2.1[0-9]*</span></samp>’.
193 1.8 mrg
194 1.10 mrg <p><hr /><a name="arc-x-elf32"></a>
195 1.8 mrg
196 1.10 mrg <h3 class="heading"><a name="TOC4"></a>arc-*-elf32</h3>
197 1.8 mrg
198 1.10 mrg <p>Use ‘<samp><span class="samp">configure --target=arc-elf32 --with-cpu=</span><var>cpu</var><span class="samp"> --enable-languages="c,c++"</span></samp>’
199 1.10 mrg to configure GCC, with <var>cpu</var> being one of ‘<samp><span class="samp">arc600</span></samp>’, ‘<samp><span class="samp">arc601</span></samp>’,
200 1.10 mrg or ‘<samp><span class="samp">arc700</span></samp>’.
201 1.8 mrg
202 1.10 mrg <p><hr /><a name="arc-linux-uclibc"></a>
203 1.8 mrg
204 1.10 mrg <h3 class="heading"><a name="TOC5"></a>arc-linux-uclibc</h3>
205 1.8 mrg
206 1.10 mrg <p>Use ‘<samp><span class="samp">configure --target=arc-linux-uclibc --with-cpu=arc700 --enable-languages="c,c++"</span></samp>’ to configure GCC.
207 1.8 mrg
208 1.10 mrg <p><hr /><a name="arm-x-eabi"></a>
209 1.6 mrg
210 1.10 mrg <h3 class="heading"><a name="TOC6"></a>arm-*-eabi</h3>
211 1.6 mrg
212 1.10 mrg <p>ARM-family processors.
213 1.6 mrg
214 1.10 mrg <p>Building the Ada frontend commonly fails (an infinite loop executing
215 1.7 mrg <code>xsinfo</code>) if the host compiler is GNAT 4.8. Host compilers built from the
216 1.7 mrg GNAT 4.6, 4.9 or 5 release branches are known to succeed.
217 1.10 mrg
218 1.10 mrg <p><hr /><a name="avr"></a>
219 1.10 mrg
220 1.10 mrg <h3 class="heading"><a name="TOC7"></a>avr</h3>
221 1.10 mrg
222 1.1 mrg <p>ATMEL AVR-family micro controllers. These are used in embedded
223 1.10 mrg applications. There are no standard Unix configurations.
224 1.1 mrg See “AVR Options” in the main manual
225 1.1 mrg for the list of supported MCU types.
226 1.10 mrg
227 1.10 mrg <p>Use ‘<samp><span class="samp">configure --target=avr --enable-languages="c"</span></samp>’ to configure GCC.
228 1.10 mrg
229 1.10 mrg <p>Further installation notes and other useful information about AVR tools
230 1.1 mrg can also be obtained from:
231 1.10 mrg
232 1.10 mrg <ul>
233 1.10 mrg <li><a href="http://www.nongnu.org/avr/">http://www.nongnu.org/avr/</a>
234 1.10 mrg <li><a href="http://www.amelek.gda.pl/avr/">http://www.amelek.gda.pl/avr/</a>
235 1.10 mrg </ul>
236 1.10 mrg
237 1.10 mrg <p>The following error:
238 1.10 mrg <pre class="smallexample"> Error: register required
239 1.10 mrg </pre>
240 1.10 mrg <p>indicates that you should upgrade to a newer version of the binutils.
241 1.10 mrg
242 1.10 mrg <p><hr /><a name="bfin"></a>
243 1.10 mrg
244 1.10 mrg <h3 class="heading"><a name="TOC8"></a>Blackfin</h3>
245 1.10 mrg
246 1.10 mrg <p>The Blackfin processor, an Analog Devices DSP.
247 1.1 mrg See “Blackfin Options” in the main manual
248 1.10 mrg
249 1.10 mrg <p>More information, and a version of binutils with support for this processor,
250 1.10 mrg is available at <a href="https://blackfin.uclinux.org">https://blackfin.uclinux.org</a>
251 1.10 mrg
252 1.10 mrg <p><hr /><a name="cr16"></a>
253 1.10 mrg
254 1.10 mrg <h3 class="heading"><a name="TOC9"></a>CR16</h3>
255 1.10 mrg
256 1.5 mrg <p>The CR16 CompactRISC architecture is a 16-bit architecture. This
257 1.5 mrg architecture is used in embedded applications.
258 1.3 mrg
259 1.10 mrg <p>See “CR16 Options” in the main manual for a list of CR16-specific options.
260 1.10 mrg
261 1.10 mrg <p>Use ‘<samp><span class="samp">configure --target=cr16-elf --enable-languages=c,c++</span></samp>’ to configure
262 1.10 mrg GCC for building a CR16 elf cross-compiler.
263 1.10 mrg
264 1.10 mrg <p>Use ‘<samp><span class="samp">configure --target=cr16-uclinux --enable-languages=c,c++</span></samp>’ to
265 1.10 mrg configure GCC for building a CR16 uclinux cross-compiler.
266 1.10 mrg
267 1.10 mrg <p><hr /><a name="cris"></a>
268 1.10 mrg
269 1.10 mrg <h3 class="heading"><a name="TOC10"></a>CRIS</h3>
270 1.10 mrg
271 1.1 mrg <p>CRIS is the CPU architecture in Axis Communications ETRAX system-on-a-chip
272 1.1 mrg series. These are used in embedded applications.
273 1.10 mrg
274 1.10 mrg <p>See “CRIS Options” in the main manual
275 1.1 mrg for a list of CRIS-specific options.
276 1.10 mrg
277 1.10 mrg <p>There are a few different CRIS targets:
278 1.10 mrg <dl>
279 1.10 mrg <dt><code>cris-axis-elf</code><dd>Mainly for monolithic embedded systems. Includes a multilib for the
280 1.10 mrg ‘<samp><span class="samp">v10</span></samp>’ core used in ‘<samp><span class="samp">ETRAX 100 LX</span></samp>’.
281 1.10 mrg <br><dt><code>cris-axis-linux-gnu</code><dd>A GNU/Linux port for the CRIS architecture, currently targeting
282 1.10 mrg ‘<samp><span class="samp">ETRAX 100 LX</span></samp>’ by default.
283 1.1 mrg </dl>
284 1.1 mrg
285 1.10 mrg <p>Pre-packaged tools can be obtained from
286 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
287 1.1 mrg information about this platform is available at
288 1.1 mrg <a href="http://developer.axis.com/">http://developer.axis.com/</a>.
289 1.10 mrg
290 1.10 mrg <p><hr /><a name="dos"></a>
291 1.10 mrg
292 1.10 mrg <h3 class="heading"><a name="TOC11"></a>DOS</h3>
293 1.10 mrg
294 1.1 mrg <p>Please have a look at the <a href="binaries.html">binaries page</a>.
295 1.10 mrg
296 1.10 mrg <p>You cannot install GCC by itself on MSDOS; it will not compile under
297 1.1 mrg any MSDOS compiler except itself. You need to get the complete
298 1.1 mrg compilation package DJGPP, which includes binaries as well as sources,
299 1.1 mrg and includes all the necessary compilation tools and libraries.
300 1.10 mrg
301 1.10 mrg <p><hr /><a name="epiphany-x-elf"></a>
302 1.10 mrg
303 1.10 mrg <h3 class="heading"><a name="TOC12"></a>epiphany-*-elf</h3>
304 1.10 mrg
305 1.10 mrg <p>Adapteva Epiphany.
306 1.3 mrg This configuration is intended for embedded systems.
307 1.10 mrg
308 1.10 mrg <p><hr /><a name="x-x-freebsd"></a>
309 1.10 mrg
310 1.10 mrg <h3 class="heading"><a name="TOC13"></a>*-*-freebsd*</h3>
311 1.10 mrg
312 1.1 mrg <p>Support for FreeBSD 1 was discontinued in GCC 3.2. Support for
313 1.1 mrg FreeBSD 2 (and any mutant a.out variants of FreeBSD 3) was
314 1.1 mrg discontinued in GCC 4.0.
315 1.10 mrg
316 1.10 mrg <p>In order to better utilize FreeBSD base system functionality and match
317 1.3 mrg the configuration of the system compiler, GCC 4.5 and above as well as
318 1.3 mrg GCC 4.4 past 2010-06-20 leverage SSP support in libc (which is present
319 1.3 mrg on FreeBSD 7 or later) and the use of <code>__cxa_atexit</code> by default
320 1.3 mrg (on FreeBSD 6 or later). The use of <code>dl_iterate_phdr</code> inside
321 1.10 mrg <samp><span class="file">libgcc_s.so.1</span></samp> and boehm-gc (on FreeBSD 7 or later) is enabled
322 1.3 mrg by GCC 4.5 and above.
323 1.10 mrg
324 1.10 mrg <p>We support FreeBSD using the ELF file format with DWARF 2 debugging
325 1.10 mrg for all CPU architectures. You may use <samp><span class="option">-gstabs</span></samp> instead of
326 1.10 mrg <samp><span class="option">-g</span></samp>, if you really want the old debugging format. There are
327 1.1 mrg no known issues with mixing object files and libraries with different
328 1.1 mrg debugging formats. Otherwise, this release of GCC should now match
329 1.1 mrg more of the configuration used in the stock FreeBSD configuration of
330 1.10 mrg GCC. In particular, <samp><span class="option">--enable-threads</span></samp> is now configured by
331 1.1 mrg default. However, as a general user, do not attempt to replace the
332 1.1 mrg system compiler with this release. Known to bootstrap and check with
333 1.1 mrg good results on FreeBSD 7.2-STABLE. In the past, known to bootstrap
334 1.1 mrg and check with good results on FreeBSD 3.0, 3.4, 4.0, 4.2, 4.3, 4.4,
335 1.1 mrg 4.5, 4.8, 4.9 and 5-CURRENT.
336 1.10 mrg
337 1.10 mrg <p>The version of binutils installed in <samp><span class="file">/usr/bin</span></samp> probably works
338 1.1 mrg with this release of GCC. Bootstrapping against the latest GNU
339 1.10 mrg binutils and/or the version found in <samp><span class="file">/usr/ports/devel/binutils</span></samp> has
340 1.1 mrg been known to enable additional features and improve overall testsuite
341 1.10 mrg results. However, it is currently known that boehm-gc may not configure
342 1.10 mrg properly on FreeBSD prior to the FreeBSD 7.0 release with GNU binutils
343 1.10 mrg after 2.16.1.
344 1.10 mrg
345 1.10 mrg <p><hr /><a name="ft32-x-elf"></a>
346 1.10 mrg
347 1.10 mrg <h3 class="heading"><a name="TOC14"></a>ft32-*-elf</h3>
348 1.10 mrg
349 1.10 mrg <p>The FT32 processor.
350 1.7 mrg This configuration is intended for embedded systems.
351 1.10 mrg
352 1.10 mrg <p><hr /><a name="h8300-hms"></a>
353 1.10 mrg
354 1.10 mrg <h3 class="heading"><a name="TOC15"></a>h8300-hms</h3>
355 1.10 mrg
356 1.1 mrg <p>Renesas H8/300 series of processors.
357 1.10 mrg
358 1.10 mrg <p>Please have a look at the <a href="binaries.html">binaries page</a>.
359 1.10 mrg
360 1.10 mrg <p>The calling convention and structure layout has changed in release 2.6.
361 1.1 mrg All code must be recompiled. The calling convention now passes the
362 1.1 mrg first three arguments in function calls in registers. Structures are no
363 1.1 mrg longer a multiple of 2 bytes.
364 1.10 mrg
365 1.10 mrg <p><hr /><a name="hppa-hp-hpux"></a>
366 1.10 mrg
367 1.10 mrg <h3 class="heading"><a name="TOC16"></a>hppa*-hp-hpux*</h3>
368 1.10 mrg
369 1.1 mrg <p>Support for HP-UX version 9 and older was discontinued in GCC 3.4.
370 1.10 mrg
371 1.10 mrg <p>We require using gas/binutils on all hppa platforms. Version 2.19 or
372 1.1 mrg later is recommended.
373 1.10 mrg
374 1.10 mrg <p>It may be helpful to configure GCC with the
375 1.10 mrg <a href="./configure.html#with-gnu-as"><samp><span class="option">--with-gnu-as</span></samp></a> and
376 1.10 mrg <samp><span class="option">--with-as=...</span></samp> options to ensure that GCC can find GAS.
377 1.10 mrg
378 1.10 mrg <p>The HP assembler should not be used with GCC. It is rarely tested and may
379 1.10 mrg not work. It shouldn't be used with any languages other than C due to its
380 1.1 mrg many limitations.
381 1.10 mrg
382 1.10 mrg <p>Specifically, <samp><span class="option">-g</span></samp> does not work (HP-UX uses a peculiar debugging
383 1.1 mrg format which GCC does not know about). It also inserts timestamps
384 1.1 mrg into each object file it creates, causing the 3-stage comparison test to
385 1.1 mrg fail during a bootstrap. You should be able to continue by saying
386 1.10 mrg ‘<samp><span class="samp">make all-host all-target</span></samp>’ after getting the failure from ‘<samp><span class="samp">make</span></samp>’.
387 1.10 mrg
388 1.10 mrg <p>Various GCC features are not supported. For example, it does not support weak
389 1.1 mrg symbols or alias definitions. As a result, explicit template instantiations
390 1.1 mrg are required when using C++. This makes it difficult if not impossible to
391 1.1 mrg build many C++ applications.
392 1.10 mrg
393 1.10 mrg <p>There are two default scheduling models for instructions. These are
394 1.1 mrg PROCESSOR_7100LC and PROCESSOR_8000. They are selected from the pa-risc
395 1.10 mrg architecture specified for the target machine when configuring.
396 1.1 mrg PROCESSOR_8000 is the default. PROCESSOR_7100LC is selected when
397 1.10 mrg the target is a ‘<samp><span class="samp">hppa1*</span></samp>’ machine.
398 1.10 mrg
399 1.10 mrg <p>The PROCESSOR_8000 model is not well suited to older processors. Thus,
400 1.1 mrg it is important to completely specify the machine architecture when
401 1.1 mrg configuring if you want a model other than PROCESSOR_8000. The macro
402 1.1 mrg TARGET_SCHED_DEFAULT can be defined in BOOT_CFLAGS if a different
403 1.1 mrg default scheduling model is desired.
404 1.10 mrg
405 1.10 mrg <p>As of GCC 4.0, GCC uses the UNIX 95 namespace for HP-UX 10.10
406 1.10 mrg through 11.00, and the UNIX 98 namespace for HP-UX 11.11 and later.
407 1.1 mrg This namespace change might cause problems when bootstrapping with
408 1.1 mrg an earlier version of GCC or the HP compiler as essentially the same
409 1.1 mrg namespace is required for an entire build. This problem can be avoided
410 1.10 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>’
411 1.10 mrg or ‘<samp><span class="samp">98</span></samp>’. Another way is to add an appropriate set of predefines
412 1.10 mrg to <samp><span class="env">CC</span></samp>. The description for the <samp><span class="option">munix=</span></samp> option contains
413 1.1 mrg a list of the predefines used with each standard.
414 1.10 mrg
415 1.10 mrg <p>More specific information to ‘<samp><span class="samp">hppa*-hp-hpux*</span></samp>’ targets follows.
416 1.10 mrg
417 1.10 mrg <p><hr /><a name="hppa-hp-hpux10"></a>
418 1.10 mrg
419 1.10 mrg <h3 class="heading"><a name="TOC17"></a>hppa*-hp-hpux10</h3>
420 1.10 mrg
421 1.1 mrg <p>For hpux10.20, we <em>highly</em> recommend you pick up the latest sed patch
422 1.1 mrg <code>PHCO_19798</code> from HP.
423 1.10 mrg
424 1.10 mrg <p>The C++ ABI has changed incompatibly in GCC 4.0. COMDAT subspaces are
425 1.1 mrg used for one-only code and data. This resolves many of the previous
426 1.1 mrg problems in using C++ on this target. However, the ABI is not compatible
427 1.1 mrg with the one implemented under HP-UX 11 using secondary definitions.
428 1.10 mrg
429 1.10 mrg <p><hr /><a name="hppa-hp-hpux11"></a>
430 1.10 mrg
431 1.10 mrg <h3 class="heading"><a name="TOC18"></a>hppa*-hp-hpux11</h3>
432 1.10 mrg
433 1.1 mrg <p>GCC 3.0 and up support HP-UX 11. GCC 2.95.x is not supported and cannot
434 1.1 mrg be used to compile GCC 3.0 and up.
435 1.10 mrg
436 1.10 mrg <p>The libffi library haven't been ported to 64-bit HP-UX and doesn't build.
437 1.10 mrg
438 1.10 mrg <p>Refer to <a href="binaries.html">binaries</a> for information about obtaining
439 1.1 mrg precompiled GCC binaries for HP-UX. Precompiled binaries must be obtained
440 1.10 mrg to build the Ada language as it cannot be bootstrapped using C. Ada is
441 1.1 mrg only available for the 32-bit PA-RISC runtime.
442 1.10 mrg
443 1.10 mrg <p>Starting with GCC 3.4 an ISO C compiler is required to bootstrap. The
444 1.10 mrg bundled compiler supports only traditional C; you will need either HP's
445 1.1 mrg unbundled compiler, or a binary distribution of GCC.
446 1.10 mrg
447 1.10 mrg <p>It is possible to build GCC 3.3 starting with the bundled HP compiler,
448 1.1 mrg but the process requires several steps. GCC 3.3 can then be used to
449 1.10 mrg build later versions.
450 1.10 mrg
451 1.10 mrg <p>There are several possible approaches to building the distribution.
452 1.1 mrg Binutils can be built first using the HP tools. Then, the GCC
453 1.1 mrg distribution can be built. The second approach is to build GCC
454 1.10 mrg first using the HP tools, then build binutils, then rebuild GCC.
455 1.1 mrg There have been problems with various binary distributions, so it
456 1.1 mrg is best not to start from a binary distribution.
457 1.10 mrg
458 1.10 mrg <p>On 64-bit capable systems, there are two distinct targets. Different
459 1.1 mrg installation prefixes must be used if both are to be installed on
460 1.10 mrg the same system. The ‘<samp><span class="samp">hppa[1-2]*-hp-hpux11*</span></samp>’ target generates code
461 1.10 mrg for the 32-bit PA-RISC runtime architecture and uses the HP linker.
462 1.10 mrg The ‘<samp><span class="samp">hppa64-hp-hpux11*</span></samp>’ target generates 64-bit code for the
463 1.1 mrg PA-RISC 2.0 architecture.
464 1.10 mrg
465 1.10 mrg <p>The script config.guess now selects the target type based on the compiler
466 1.10 mrg detected during configuration. You must define <samp><span class="env">PATH</span></samp> or <samp><span class="env">CC</span></samp> so
467 1.10 mrg that configure finds an appropriate compiler for the initial bootstrap.
468 1.10 mrg When <samp><span class="env">CC</span></samp> is used, the definition should contain the options that are
469 1.10 mrg needed whenever <samp><span class="env">CC</span></samp> is used.
470 1.10 mrg
471 1.10 mrg <p>Specifically, options that determine the runtime architecture must be
472 1.10 mrg in <samp><span class="env">CC</span></samp> to correctly select the target for the build. It is also
473 1.10 mrg convenient to place many other compiler options in <samp><span class="env">CC</span></samp>. For example,
474 1.10 mrg <samp><span class="env">CC="cc -Ac +DA2.0W -Wp,-H16376 -D_CLASSIC_TYPES -D_HPUX_SOURCE"</span></samp>
475 1.1 mrg can be used to bootstrap the GCC 3.3 branch with the HP compiler in
476 1.10 mrg 64-bit K&R/bundled mode. The <samp><span class="option">+DA2.0W</span></samp> option will result in
477 1.10 mrg the automatic selection of the ‘<samp><span class="samp">hppa64-hp-hpux11*</span></samp>’ target. The
478 1.1 mrg macro definition table of cpp needs to be increased for a successful
479 1.1 mrg build with the HP compiler. _CLASSIC_TYPES and _HPUX_SOURCE need to
480 1.1 mrg be defined when building with the bundled compiler, or when using the
481 1.10 mrg <samp><span class="option">-Ac</span></samp> option. These defines aren't necessary with <samp><span class="option">-Ae</span></samp>.
482 1.10 mrg
483 1.10 mrg <p>It is best to explicitly configure the ‘<samp><span class="samp">hppa64-hp-hpux11*</span></samp>’ target
484 1.10 mrg with the <samp><span class="option">--with-ld=...</span></samp> option. This overrides the standard
485 1.1 mrg search for ld. The two linkers supported on this target require different
486 1.1 mrg commands. The default linker is determined during configuration. As a
487 1.10 mrg result, it's not possible to switch linkers in the middle of a GCC build.
488 1.1 mrg This has been reported to sometimes occur in unified builds of binutils
489 1.1 mrg and GCC.
490 1.10 mrg
491 1.10 mrg <p>A recent linker patch must be installed for the correct operation of
492 1.1 mrg GCC 3.3 and later. <code>PHSS_26559</code> and <code>PHSS_24304</code> are the
493 1.1 mrg oldest linker patches that are known to work. They are for HP-UX
494 1.1 mrg 11.00 and 11.11, respectively. <code>PHSS_24303</code>, the companion to
495 1.10 mrg <code>PHSS_24304</code>, might be usable but it hasn't been tested. These
496 1.1 mrg patches have been superseded. Consult the HP patch database to obtain
497 1.1 mrg the currently recommended linker patch for your system.
498 1.10 mrg
499 1.10 mrg <p>The patches are necessary for the support of weak symbols on the
500 1.1 mrg 32-bit port, and for the running of initializers and finalizers. Weak
501 1.1 mrg symbols are implemented using SOM secondary definition symbols. Prior
502 1.10 mrg to HP-UX 11, there are bugs in the linker support for secondary symbols.
503 1.1 mrg The patches correct a problem of linker core dumps creating shared
504 1.1 mrg libraries containing secondary symbols, as well as various other
505 1.1 mrg linking issues involving secondary symbols.
506 1.10 mrg
507 1.10 mrg <p>GCC 3.3 uses the ELF DT_INIT_ARRAY and DT_FINI_ARRAY capabilities to
508 1.1 mrg run initializers and finalizers on the 64-bit port. The 32-bit port
509 1.10 mrg uses the linker <samp><span class="option">+init</span></samp> and <samp><span class="option">+fini</span></samp> options for the same
510 1.1 mrg purpose. The patches correct various problems with the +init/+fini
511 1.1 mrg options, including program core dumps. Binutils 2.14 corrects a
512 1.10 mrg problem on the 64-bit port resulting from HP's non-standard use of
513 1.1 mrg the .init and .fini sections for array initializers and finalizers.
514 1.10 mrg
515 1.10 mrg <p>Although the HP and GNU linkers are both supported for the
516 1.10 mrg ‘<samp><span class="samp">hppa64-hp-hpux11*</span></samp>’ target, it is strongly recommended that the
517 1.1 mrg HP linker be used for link editing on this target.
518 1.10 mrg
519 1.10 mrg <p>At this time, the GNU linker does not support the creation of long
520 1.10 mrg branch stubs. As a result, it cannot successfully link binaries
521 1.1 mrg containing branch offsets larger than 8 megabytes. In addition,
522 1.1 mrg there are problems linking shared libraries, linking executables
523 1.10 mrg with <samp><span class="option">-static</span></samp>, and with dwarf2 unwind and exception support.
524 1.10 mrg It also doesn't provide stubs for internal calls to global functions
525 1.10 mrg in shared libraries, so these calls cannot be overloaded.
526 1.10 mrg
527 1.10 mrg <p>The HP dynamic loader does not support GNU symbol versioning, so symbol
528 1.1 mrg versioning is not supported. It may be necessary to disable symbol
529 1.10 mrg versioning with <samp><span class="option">--disable-symvers</span></samp> when using GNU ld.
530 1.10 mrg
531 1.10 mrg <p>POSIX threads are the default. The optional DCE thread library is not
532 1.10 mrg supported, so <samp><span class="option">--enable-threads=dce</span></samp> does not work.
533 1.10 mrg
534 1.10 mrg <p><hr /><a name="x-x-linux-gnu"></a>
535 1.10 mrg
536 1.10 mrg <h3 class="heading"><a name="TOC19"></a>*-*-linux-gnu</h3>
537 1.10 mrg
538 1.1 mrg <p>Versions of libstdc++-v3 starting with 3.2.1 require bug fixes present
539 1.1 mrg in glibc 2.2.5 and later. More information is available in the
540 1.1 mrg libstdc++-v3 documentation.
541 1.10 mrg
542 1.10 mrg <p><hr /><a name="ix86-x-linux"></a>
543 1.10 mrg
544 1.10 mrg <h3 class="heading"><a name="TOC20"></a>i?86-*-linux*</h3>
545 1.10 mrg
546 1.10 mrg <p>As of GCC 3.3, binutils 2.13.1 or later is required for this platform.
547 1.1 mrg See <a href="http://gcc.gnu.org/PR10877">bug 10877</a> for more information.
548 1.10 mrg
549 1.10 mrg <p>If you receive Signal 11 errors when building on GNU/Linux, then it is
550 1.1 mrg possible you have a hardware problem. Further information on this can be
551 1.1 mrg found on <a href="http://www.bitwizard.nl/sig11/">www.bitwizard.nl</a>.
552 1.10 mrg
553 1.10 mrg <p><hr /><a name="ix86-x-solaris210"></a>
554 1.10 mrg
555 1.10 mrg <h3 class="heading"><a name="TOC21"></a>i?86-*-solaris2.10</h3>
556 1.10 mrg
557 1.3 mrg <p>Use this for Solaris 10 or later on x86 and x86-64 systems. Starting
558 1.10 mrg with GCC 4.7, there is also a 64-bit ‘<samp><span class="samp">amd64-*-solaris2.1[0-9]*</span></samp>’ or
559 1.10 mrg ‘<samp><span class="samp">x86_64-*-solaris2.1[0-9]*</span></samp>’ configuration that corresponds to
560 1.10 mrg ‘<samp><span class="samp">sparcv9-sun-solaris2*</span></samp>’.
561 1.10 mrg
562 1.10 mrg <p>It is recommended that you configure GCC to use the GNU assembler. The
563 1.7 mrg versions included in Solaris 10, from GNU binutils 2.15 (in
564 1.10 mrg <samp><span class="file">/usr/sfw/bin/gas</span></samp>), and Solaris 11, from GNU binutils 2.19 or
565 1.10 mrg newer (also available as <samp><span class="file">/usr/bin/gas</span></samp> and
566 1.10 mrg <samp><span class="file">/usr/gnu/bin/as</span></samp>), work fine. Please note that the current
567 1.7 mrg version, from GNU binutils 2.26, only works on Solaris 12 when using the
568 1.7 mrg Solaris linker. On Solaris 10 and 11, you either have to wait for GNU
569 1.7 mrg binutils 2.26.1 or newer, or stay with GNU binutils 2.25.1. Recent
570 1.10 mrg versions of the Solaris assembler in <samp><span class="file">/usr/ccs/bin/as</span></samp> work almost
571 1.10 mrg as well, though.
572 1.10 mrg <!-- FIXME: as patch requirements? -->
573 1.10 mrg
574 1.10 mrg <p>For linking, the Solaris linker, is preferred. If you want to use the GNU
575 1.7 mrg linker instead, note that due to a packaging bug the version in Solaris
576 1.10 mrg 10, from GNU binutils 2.15 (in <samp><span class="file">/usr/sfw/bin/gld</span></samp>), cannot be used,
577 1.7 mrg while the version in Solaris 11, from GNU binutils 2.19 or newer (also
578 1.10 mrg in <samp><span class="file">/usr/gnu/bin/ld</span></samp> and <samp><span class="file">/usr/bin/gld</span></samp>), works, as does the
579 1.7 mrg latest version, from GNU binutils 2.26.
580 1.10 mrg
581 1.10 mrg <p>To use GNU <samp><span class="command">as</span></samp>, configure with the options
582 1.10 mrg <samp><span class="option">--with-gnu-as --with-as=/usr/sfw/bin/gas</span></samp>. It may be necessary
583 1.10 mrg to configure with <samp><span class="option">--without-gnu-ld --with-ld=/usr/ccs/bin/ld</span></samp> to
584 1.10 mrg guarantee use of Sun <samp><span class="command">ld</span></samp>.
585 1.10 mrg <!-- FIXME: why -without-gnu-ld -with-ld? -->
586 1.10 mrg
587 1.10 mrg <p><hr /><a name="ia64-x-linux"></a>
588 1.10 mrg
589 1.10 mrg <h3 class="heading"><a name="TOC22"></a>ia64-*-linux</h3>
590 1.10 mrg
591 1.1 mrg <p>IA-64 processor (also known as IPF, or Itanium Processor Family)
592 1.1 mrg running GNU/Linux.
593 1.10 mrg
594 1.10 mrg <p>If you are using the installed system libunwind library with
595 1.10 mrg <samp><span class="option">--with-system-libunwind</span></samp>, then you must use libunwind 0.98 or
596 1.1 mrg later.
597 1.10 mrg
598 1.10 mrg <p>None of the following versions of GCC has an ABI that is compatible
599 1.1 mrg with any of the other versions in this list, with the exception that
600 1.1 mrg Red Hat 2.96 and Trillian 000171 are compatible with each other:
601 1.10 mrg 3.1, 3.0.2, 3.0.1, 3.0, Red Hat 2.96, and Trillian 000717.
602 1.10 mrg This primarily affects C++ programs and programs that create shared libraries.
603 1.10 mrg GCC 3.1 or later is recommended for compiling linux, the kernel.
604 1.1 mrg As of version 3.1 GCC is believed to be fully ABI compliant, and hence no
605 1.1 mrg more major ABI changes are expected.
606 1.10 mrg
607 1.10 mrg <p><hr /><a name="ia64-x-hpux"></a>
608 1.10 mrg
609 1.10 mrg <h3 class="heading"><a name="TOC23"></a>ia64-*-hpux*</h3>
610 1.10 mrg
611 1.1 mrg <p>Building GCC on this target requires the GNU Assembler. The bundled HP
612 1.1 mrg assembler will not work. To prevent GCC from using the wrong assembler,
613 1.10 mrg the option <samp><span class="option">--with-gnu-as</span></samp> may be necessary.
614 1.10 mrg
615 1.10 mrg <p>The GCC libunwind library has not been ported to HPUX. This means that for
616 1.10 mrg GCC versions 3.2.3 and earlier, <samp><span class="option">--enable-libunwind-exceptions</span></samp>
617 1.10 mrg is required to build GCC. For GCC 3.3 and later, this is the default.
618 1.10 mrg For gcc 3.4.3 and later, <samp><span class="option">--enable-libunwind-exceptions</span></samp> is
619 1.1 mrg removed and the system libunwind library will always be used.
620 1.10 mrg
621 1.10 mrg <p><hr />
622 1.10 mrg <!-- rs6000-ibm-aix*, powerpc-ibm-aix* --><a name="x-ibm-aix"></a>
623 1.10 mrg
624 1.10 mrg <h3 class="heading"><a name="TOC24"></a>*-ibm-aix*</h3>
625 1.10 mrg
626 1.10 mrg <p>Support for AIX version 3 and older was discontinued in GCC 3.4.
627 1.1 mrg Support for AIX version 4.2 and older was discontinued in GCC 4.5.
628 1.10 mrg
629 1.10 mrg <p>“out of memory” bootstrap failures may indicate a problem with
630 1.1 mrg process resource limits (ulimit). Hard limits are configured in the
631 1.10 mrg <samp><span class="file">/etc/security/limits</span></samp> system configuration file.
632 1.10 mrg
633 1.10 mrg <p>GCC 4.9 and above require a C++ compiler for bootstrap. IBM VAC++ / xlC
634 1.7 mrg cannot bootstrap GCC. xlc can bootstrap an older version of GCC and
635 1.7 mrg G++ can bootstrap recent releases of GCC.
636 1.10 mrg
637 1.10 mrg <p>GCC can bootstrap with recent versions of IBM XLC, but bootstrapping
638 1.1 mrg with an earlier release of GCC is recommended. Bootstrapping with XLC
639 1.1 mrg requires a larger data segment, which can be enabled through the
640 1.1 mrg <var>LDR_CNTRL</var> environment variable, e.g.,
641 1.1 mrg
642 1.10 mrg <pre class="smallexample"> % LDR_CNTRL=MAXDATA=0x50000000
643 1.10 mrg % export LDR_CNTRL
644 1.10 mrg </pre>
645 1.10 mrg <p>One can start with a pre-compiled version of GCC to build from
646 1.10 mrg sources. One may delete GCC's “fixed” header files when starting
647 1.1 mrg with a version of GCC built for an earlier release of AIX.
648 1.1 mrg
649 1.10 mrg <p>To speed up the configuration phases of bootstrapping and installing GCC,
650 1.10 mrg one may use GNU Bash instead of AIX <samp><span class="command">/bin/sh</span></samp>, e.g.,
651 1.10 mrg
652 1.10 mrg <pre class="smallexample"> % CONFIG_SHELL=/opt/freeware/bin/bash
653 1.10 mrg % export CONFIG_SHELL
654 1.10 mrg </pre>
655 1.10 mrg <p>and then proceed as described in <a href="build.html">the build instructions</a>, where we strongly recommend specifying an absolute path
656 1.1 mrg to invoke <var>srcdir</var>/configure.
657 1.10 mrg
658 1.10 mrg <p>Because GCC on AIX is built as a 32-bit executable by default,
659 1.1 mrg (although it can generate 64-bit programs) the GMP and MPFR libraries
660 1.1 mrg required by gfortran must be 32-bit libraries. Building GMP and MPFR
661 1.1 mrg as static archive libraries works better than shared libraries.
662 1.10 mrg
663 1.10 mrg <p>Errors involving <code>alloca</code> when building GCC generally are due
664 1.1 mrg to an incorrect definition of <code>CC</code> in the Makefile or mixing files
665 1.1 mrg compiled with the native C compiler and GCC. During the stage1 phase of
666 1.10 mrg the build, the native AIX compiler <strong>must</strong> be invoked as <samp><span class="command">cc</span></samp>
667 1.10 mrg (not <samp><span class="command">xlc</span></samp>). Once <samp><span class="command">configure</span></samp> has been informed of
668 1.10 mrg <samp><span class="command">xlc</span></samp>, one needs to use ‘<samp><span class="samp">make distclean</span></samp>’ to remove the
669 1.10 mrg configure cache files and ensure that <samp><span class="env">CC</span></samp> environment variable
670 1.10 mrg does not provide a definition that will confuse <samp><span class="command">configure</span></samp>.
671 1.1 mrg If this error occurs during stage2 or later, then the problem most likely
672 1.1 mrg is the version of Make (see above).
673 1.10 mrg
674 1.10 mrg <p>The native <samp><span class="command">as</span></samp> and <samp><span class="command">ld</span></samp> are recommended for
675 1.3 mrg bootstrapping on AIX. The GNU Assembler, GNU Linker, and GNU
676 1.3 mrg Binutils version 2.20 is the minimum level that supports bootstrap on
677 1.10 mrg AIX 5. The GNU Assembler has not been updated to support AIX 6 or
678 1.3 mrg AIX 7. The native AIX tools do interoperate with GCC.
679 1.10 mrg
680 1.10 mrg <p>AIX 7.1 added partial support for DWARF debugging, but full support
681 1.7 mrg requires AIX 7.1 TL03 SP7 that supports additional DWARF sections and
682 1.7 mrg fixes a bug in the assembler. AIX 7.1 TL03 SP5 distributed a version
683 1.7 mrg of libm.a missing important symbols; a fix for IV77796 will be
684 1.7 mrg included in SP6.
685 1.10 mrg
686 1.10 mrg <p>AIX 5.3 TL10, AIX 6.1 TL05 and AIX 7.1 TL00 introduced an AIX
687 1.3 mrg assembler change that sometimes produces corrupt assembly files
688 1.3 mrg causing AIX linker errors. The bug breaks GCC bootstrap on AIX and
689 1.3 mrg can cause compilation failures with existing GCC installations. An
690 1.3 mrg AIX iFix for AIX 5.3 is available (APAR IZ98385 for AIX 5.3 TL10, APAR
691 1.3 mrg IZ98477 for AIX 5.3 TL11 and IZ98134 for AIX 5.3 TL12). AIX 5.3 TL11 SP8,
692 1.3 mrg AIX 5.3 TL12 SP5, AIX 6.1 TL04 SP11, AIX 6.1 TL05 SP7, AIX 6.1 TL06 SP6,
693 1.3 mrg AIX 6.1 TL07 and AIX 7.1 TL01 should include the fix.
694 1.10 mrg
695 1.10 mrg <p>Building <samp><span class="file">libstdc++.a</span></samp> requires a fix for an AIX Assembler bug
696 1.1 mrg APAR IY26685 (AIX 4.3) or APAR IY25528 (AIX 5.1). It also requires a
697 1.1 mrg fix for another AIX Assembler bug and a co-dependent AIX Archiver fix
698 1.1 mrg referenced as APAR IY53606 (AIX 5.2) or as APAR IY54774 (AIX 5.1)
699 1.10 mrg
700 1.10 mrg <p><a name="TransferAixShobj"></a>‘<samp><span class="samp">libstdc++</span></samp>’ in GCC 3.4 increments the major version number of the
701 1.10 mrg shared object and GCC installation places the <samp><span class="file">libstdc++.a</span></samp>
702 1.1 mrg shared library in a common location which will overwrite the and GCC
703 1.1 mrg 3.3 version of the shared library. Applications either need to be
704 1.1 mrg re-linked against the new shared library or the GCC 3.1 and GCC 3.3
705 1.10 mrg versions of the ‘<samp><span class="samp">libstdc++</span></samp>’ shared object needs to be available
706 1.10 mrg to the AIX runtime loader. The GCC 3.1 ‘<samp><span class="samp">libstdc++.so.4</span></samp>’, if
707 1.10 mrg present, and GCC 3.3 ‘<samp><span class="samp">libstdc++.so.5</span></samp>’ shared objects can be
708 1.1 mrg installed for runtime dynamic loading using the following steps to set
709 1.10 mrg the ‘<samp><span class="samp">F_LOADONLY</span></samp>’ flag in the shared object for <em>each</em>
710 1.10 mrg multilib <samp><span class="file">libstdc++.a</span></samp> installed:
711 1.1 mrg
712 1.10 mrg <p>Extract the shared objects from the currently installed
713 1.10 mrg <samp><span class="file">libstdc++.a</span></samp> archive:
714 1.10 mrg <pre class="smallexample"> % ar -x libstdc++.a libstdc++.so.4 libstdc++.so.5
715 1.10 mrg </pre>
716 1.10 mrg <p>Enable the ‘<samp><span class="samp">F_LOADONLY</span></samp>’ flag so that the shared object will be
717 1.1 mrg available for runtime dynamic loading, but not linking:
718 1.10 mrg <pre class="smallexample"> % strip -e libstdc++.so.4 libstdc++.so.5
719 1.10 mrg </pre>
720 1.10 mrg <p>Archive the runtime-only shared object in the GCC 3.4
721 1.10 mrg <samp><span class="file">libstdc++.a</span></samp> archive:
722 1.10 mrg <pre class="smallexample"> % ar -q libstdc++.a libstdc++.so.4 libstdc++.so.5
723 1.10 mrg </pre>
724 1.10 mrg <p>Eventually, the
725 1.10 mrg <a href="./configure.html#WithAixSoname"><samp><span class="option">--with-aix-soname=svr4</span></samp></a>
726 1.5 mrg configure option may drop the need for this procedure for libraries that
727 1.5 mrg support it.
728 1.10 mrg
729 1.10 mrg <p>Linking executables and shared libraries may produce warnings of
730 1.1 mrg duplicate symbols. The assembly files generated by GCC for AIX always
731 1.1 mrg have included multiple symbol definitions for certain global variable
732 1.1 mrg and function declarations in the original program. The warnings should
733 1.1 mrg not prevent the linker from producing a correct library or runnable
734 1.1 mrg executable.
735 1.10 mrg
736 1.10 mrg <p>AIX 4.3 utilizes a “large format” archive to support both 32-bit and
737 1.1 mrg 64-bit object modules. The routines provided in AIX 4.3.0 and AIX 4.3.1
738 1.10 mrg to parse archive libraries did not handle the new format correctly.
739 1.1 mrg These routines are used by GCC and result in error messages during
740 1.1 mrg linking such as “not a COFF file”. The version of the routines shipped
741 1.10 mrg with AIX 4.3.1 should work for a 32-bit environment. The <samp><span class="option">-g</span></samp>
742 1.1 mrg option of the archive command may be used to create archives of 32-bit
743 1.1 mrg objects using the original “small format”. A correct version of the
744 1.1 mrg routines is shipped with AIX 4.3.2 and above.
745 1.10 mrg
746 1.10 mrg <p>Some versions of the AIX binder (linker) can fail with a relocation
747 1.10 mrg overflow severe error when the <samp><span class="option">-bbigtoc</span></samp> option is used to link
748 1.1 mrg GCC-produced object files into an executable that overflows the TOC. A fix
749 1.1 mrg for APAR IX75823 (OVERFLOW DURING LINK WHEN USING GCC AND -BBIGTOC) is
750 1.1 mrg available from IBM Customer Support and from its
751 1.1 mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
752 1.1 mrg website as PTF U455193.
753 1.10 mrg
754 1.10 mrg <p>The AIX 4.3.2.1 linker (bos.rte.bind_cmds Level 4.3.2.1) will dump core
755 1.1 mrg with a segmentation fault when invoked by any version of GCC. A fix for
756 1.1 mrg APAR IX87327 is available from IBM Customer Support and from its
757 1.1 mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
758 1.1 mrg website as PTF U461879. This fix is incorporated in AIX 4.3.3 and above.
759 1.10 mrg
760 1.10 mrg <p>The initial assembler shipped with AIX 4.3.0 generates incorrect object
761 1.1 mrg files. A fix for APAR IX74254 (64BIT DISASSEMBLED OUTPUT FROM COMPILER FAILS
762 1.1 mrg TO ASSEMBLE/BIND) is available from IBM Customer Support and from its
763 1.1 mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
764 1.1 mrg website as PTF U453956. This fix is incorporated in AIX 4.3.1 and above.
765 1.10 mrg
766 1.10 mrg <p>AIX provides National Language Support (NLS). Compilers and assemblers
767 1.1 mrg use NLS to support locale-specific representations of various data
768 1.10 mrg formats including floating-point numbers (e.g., ‘<samp><span class="samp">.</span></samp>’ vs ‘<samp><span class="samp">,</span></samp>’ for
769 1.1 mrg separating decimal fractions). There have been problems reported where
770 1.1 mrg GCC does not produce the same floating-point formats that the assembler
771 1.10 mrg expects. If one encounters this problem, set the <samp><span class="env">LANG</span></samp>
772 1.10 mrg environment variable to ‘<samp><span class="samp">C</span></samp>’ or ‘<samp><span class="samp">En_US</span></samp>’.
773 1.10 mrg
774 1.10 mrg <p>A default can be specified with the <samp><span class="option">-mcpu=</span><var>cpu_type</var></samp>
775 1.10 mrg switch and using the configure option <samp><span class="option">--with-cpu-</span><var>cpu_type</var></samp>.
776 1.10 mrg
777 1.10 mrg <p><hr /><a name="iq2000-x-elf"></a>
778 1.10 mrg
779 1.10 mrg <h3 class="heading"><a name="TOC25"></a>iq2000-*-elf</h3>
780 1.10 mrg
781 1.1 mrg <p>Vitesse IQ2000 processors. These are used in embedded
782 1.1 mrg applications. There are no standard Unix configurations.
783 1.10 mrg
784 1.10 mrg <p><hr /><a name="lm32-x-elf"></a>
785 1.10 mrg
786 1.10 mrg <h3 class="heading"><a name="TOC26"></a>lm32-*-elf</h3>
787 1.10 mrg
788 1.10 mrg <p>Lattice Mico32 processor.
789 1.1 mrg This configuration is intended for embedded systems.
790 1.10 mrg
791 1.10 mrg <p><hr /><a name="lm32-x-uclinux"></a>
792 1.10 mrg
793 1.10 mrg <h3 class="heading"><a name="TOC27"></a>lm32-*-uclinux</h3>
794 1.10 mrg
795 1.10 mrg <p>Lattice Mico32 processor.
796 1.1 mrg This configuration is intended for embedded systems running uClinux.
797 1.10 mrg
798 1.10 mrg <p><hr /><a name="m32c-x-elf"></a>
799 1.10 mrg
800 1.10 mrg <h3 class="heading"><a name="TOC28"></a>m32c-*-elf</h3>
801 1.10 mrg
802 1.10 mrg <p>Renesas M32C processor.
803 1.1 mrg This configuration is intended for embedded systems.
804 1.10 mrg
805 1.10 mrg <p><hr /><a name="m32r-x-elf"></a>
806 1.10 mrg
807 1.10 mrg <h3 class="heading"><a name="TOC29"></a>m32r-*-elf</h3>
808 1.10 mrg
809 1.10 mrg <p>Renesas M32R processor.
810 1.1 mrg This configuration is intended for embedded systems.
811 1.10 mrg
812 1.10 mrg <p><hr /><a name="m68k-x-x"></a>
813 1.10 mrg
814 1.10 mrg <h3 class="heading"><a name="TOC30"></a>m68k-*-*</h3>
815 1.10 mrg
816 1.1 mrg <p>By default,
817 1.10 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
818 1.10 mrg ‘<samp><span class="samp">m68k-*-linux</span></samp>’
819 1.1 mrg build libraries for both M680x0 and ColdFire processors. If you only
820 1.1 mrg need the M680x0 libraries, you can omit the ColdFire ones by passing
821 1.10 mrg <samp><span class="option">--with-arch=m68k</span></samp> to <samp><span class="command">configure</span></samp>. Alternatively, you
822 1.10 mrg can omit the M680x0 libraries by passing <samp><span class="option">--with-arch=cf</span></samp> to
823 1.10 mrg <samp><span class="command">configure</span></samp>. These targets default to 5206 or 5475 code as
824 1.1 mrg appropriate for the target system when
825 1.10 mrg configured with <samp><span class="option">--with-arch=cf</span></samp> and 68020 code otherwise.
826 1.10 mrg
827 1.10 mrg <p>The ‘<samp><span class="samp">m68k-*-netbsd</span></samp>’ and
828 1.10 mrg ‘<samp><span class="samp">m68k-*-openbsd</span></samp>’ targets also support the <samp><span class="option">--with-arch</span></samp>
829 1.1 mrg option. They will generate ColdFire CFV4e code when configured with
830 1.10 mrg <samp><span class="option">--with-arch=cf</span></samp> and 68020 code otherwise.
831 1.10 mrg
832 1.10 mrg <p>You can override the default processors listed above by configuring
833 1.10 mrg with <samp><span class="option">--with-cpu=</span><var>target</var></samp>. This <var>target</var> can either
834 1.10 mrg be a <samp><span class="option">-mcpu</span></samp> argument or one of the following values:
835 1.10 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>’,
836 1.10 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>’.
837 1.10 mrg
838 1.10 mrg <p>GCC requires at least binutils version 2.17 on these targets.
839 1.10 mrg
840 1.10 mrg <p><hr /><a name="m68k-x-uclinux"></a>
841 1.10 mrg
842 1.10 mrg <h3 class="heading"><a name="TOC31"></a>m68k-*-uclinux</h3>
843 1.10 mrg
844 1.1 mrg <p>GCC 4.3 changed the uClinux configuration so that it uses the
845 1.10 mrg ‘<samp><span class="samp">m68k-linux-gnu</span></samp>’ ABI rather than the ‘<samp><span class="samp">m68k-elf</span></samp>’ ABI.
846 1.1 mrg It also added improved support for C++ and flat shared libraries,
847 1.3 mrg both of which were ABI changes.
848 1.10 mrg
849 1.10 mrg <p><hr /><a name="microblaze-x-elf"></a>
850 1.10 mrg
851 1.10 mrg <h3 class="heading"><a name="TOC32"></a>microblaze-*-elf</h3>
852 1.10 mrg
853 1.10 mrg <p>Xilinx MicroBlaze processor.
854 1.1 mrg This configuration is intended for embedded systems.
855 1.10 mrg
856 1.10 mrg <p><hr /><a name="mips-x-x"></a>
857 1.10 mrg
858 1.10 mrg <h3 class="heading"><a name="TOC33"></a>mips-*-*</h3>
859 1.10 mrg
860 1.1 mrg <p>If on a MIPS system you get an error message saying “does not have gp
861 1.10 mrg sections for all it's [sic] sectons [sic]”, don't worry about it. This
862 1.1 mrg happens whenever you use GAS with the MIPS linker, but there is not
863 1.1 mrg really anything wrong, and it is okay to use the output file. You can
864 1.1 mrg stop such warnings by installing the GNU linker.
865 1.10 mrg
866 1.10 mrg <p>It would be nice to extend GAS to produce the gp tables, but they are
867 1.1 mrg optional, and there should not be a warning about their absence.
868 1.10 mrg
869 1.10 mrg <p>The libstdc++ atomic locking routines for MIPS targets requires MIPS II
870 1.1 mrg and later. A patch went in just after the GCC 3.3 release to
871 1.10 mrg make ‘<samp><span class="samp">mips*-*-*</span></samp>’ use the generic implementation instead. You can also
872 1.10 mrg configure for ‘<samp><span class="samp">mipsel-elf</span></samp>’ as a workaround. The
873 1.10 mrg ‘<samp><span class="samp">mips*-*-linux*</span></samp>’ target continues to use the MIPS II routines. More
874 1.1 mrg work on this is expected in future releases.
875 1.1 mrg
876 1.10 mrg <!-- If you make -with-llsc the default for another target, please also -->
877 1.10 mrg <!-- update the description of the -with-llsc option. -->
878 1.10 mrg <p>The built-in <code>__sync_*</code> functions are available on MIPS II and
879 1.10 mrg later systems and others that support the ‘<samp><span class="samp">ll</span></samp>’, ‘<samp><span class="samp">sc</span></samp>’ and
880 1.10 mrg ‘<samp><span class="samp">sync</span></samp>’ instructions. This can be overridden by passing
881 1.10 mrg <samp><span class="option">--with-llsc</span></samp> or <samp><span class="option">--without-llsc</span></samp> when configuring GCC.
882 1.1 mrg Since the Linux kernel emulates these instructions if they are
883 1.10 mrg missing, the default for ‘<samp><span class="samp">mips*-*-linux*</span></samp>’ targets is
884 1.10 mrg <samp><span class="option">--with-llsc</span></samp>. The <samp><span class="option">--with-llsc</span></samp> and
885 1.10 mrg <samp><span class="option">--without-llsc</span></samp> configure options may be overridden at compile
886 1.10 mrg time by passing the <samp><span class="option">-mllsc</span></samp> or <samp><span class="option">-mno-llsc</span></samp> options to
887 1.1 mrg the compiler.
888 1.10 mrg
889 1.10 mrg <p>MIPS systems check for division by zero (unless
890 1.10 mrg <samp><span class="option">-mno-check-zero-division</span></samp> is passed to the compiler) by
891 1.1 mrg generating either a conditional trap or a break instruction. Using
892 1.1 mrg trap results in smaller code, but is only supported on MIPS II and
893 1.1 mrg later. Also, some versions of the Linux kernel have a bug that
894 1.1 mrg prevents trap from generating the proper signal (<code>SIGFPE</code>). To enable
895 1.10 mrg the use of break, use the <samp><span class="option">--with-divide=breaks</span></samp>
896 1.10 mrg <samp><span class="command">configure</span></samp> option when configuring GCC. The default is to
897 1.1 mrg use traps on systems that support them.
898 1.10 mrg
899 1.10 mrg <p><hr /><a name="mips-sgi-irix5"></a>
900 1.10 mrg
901 1.10 mrg <h3 class="heading"><a name="TOC34"></a>mips-sgi-irix5</h3>
902 1.10 mrg
903 1.3 mrg <p>Support for IRIX 5 has been removed in GCC 4.6.
904 1.10 mrg
905 1.10 mrg <p><hr /><a name="mips-sgi-irix6"></a>
906 1.10 mrg
907 1.10 mrg <h3 class="heading"><a name="TOC35"></a>mips-sgi-irix6</h3>
908 1.10 mrg
909 1.3 mrg <p>Support for IRIX 6.5 has been removed in GCC 4.8. Support for IRIX 6
910 1.3 mrg releases before 6.5 has been removed in GCC 4.6, as well as support for
911 1.3 mrg the O32 ABI.
912 1.10 mrg
913 1.10 mrg <p><hr /><a name="moxie-x-elf"></a>
914 1.10 mrg
915 1.10 mrg <h3 class="heading"><a name="TOC36"></a>moxie-*-elf</h3>
916 1.10 mrg
917 1.3 mrg <p>The moxie processor.
918 1.10 mrg
919 1.10 mrg <p><hr /><a name="msp430-x-elf"></a>
920 1.10 mrg
921 1.10 mrg <h3 class="heading"><a name="TOC37"></a>msp430-*-elf</h3>
922 1.10 mrg
923 1.10 mrg <p>TI MSP430 processor.
924 1.5 mrg This configuration is intended for embedded systems.
925 1.10 mrg
926 1.10 mrg <p><hr /><a name="nds32le-x-elf"></a>
927 1.10 mrg
928 1.10 mrg <h3 class="heading"><a name="TOC38"></a>nds32le-*-elf</h3>
929 1.10 mrg
930 1.5 mrg <p>Andes NDS32 target in little endian mode.
931 1.10 mrg
932 1.10 mrg <p><hr /><a name="nds32be-x-elf"></a>
933 1.10 mrg
934 1.10 mrg <h3 class="heading"><a name="TOC39"></a>nds32be-*-elf</h3>
935 1.10 mrg
936 1.5 mrg <p>Andes NDS32 target in big endian mode.
937 1.10 mrg
938 1.10 mrg <p><hr /><a name="nvptx-x-none"></a>
939 1.10 mrg
940 1.10 mrg <h3 class="heading"><a name="TOC40"></a>nvptx-*-none</h3>
941 1.10 mrg
942 1.5 mrg <p>Nvidia PTX target.
943 1.10 mrg
944 1.10 mrg <p>Instead of GNU binutils, you will need to install
945 1.10 mrg <a href="https://github.com/MentorEmbedded/nvptx-tools/">nvptx-tools</a>.
946 1.5 mrg Tell GCC where to find it:
947 1.10 mrg <samp><span class="option">--with-build-time-tools=[install-nvptx-tools]/nvptx-none/bin</span></samp>.
948 1.10 mrg
949 1.10 mrg <p>A nvptx port of newlib is available at
950 1.10 mrg <a href="https://github.com/MentorEmbedded/nvptx-newlib/">nvptx-newlib</a>.
951 1.5 mrg It can be automatically built together with GCC. For this, add a
952 1.10 mrg symbolic link to nvptx-newlib's <samp><span class="file">newlib</span></samp> directory to the
953 1.5 mrg directory containing the GCC sources.
954 1.10 mrg
955 1.10 mrg <p>Use the <samp><span class="option">--disable-sjlj-exceptions</span></samp> and
956 1.10 mrg <samp><span class="option">--enable-newlib-io-long-long</span></samp> options when configuring.
957 1.10 mrg
958 1.10 mrg <p><hr /><a name="powerpc-x-x"></a>
959 1.10 mrg
960 1.10 mrg <h3 class="heading"><a name="TOC41"></a>powerpc-*-*</h3>
961 1.10 mrg
962 1.10 mrg <p>You can specify a default version for the <samp><span class="option">-mcpu=</span><var>cpu_type</var></samp>
963 1.10 mrg switch by using the configure option <samp><span class="option">--with-cpu-</span><var>cpu_type</var></samp>.
964 1.10 mrg
965 1.10 mrg <p>You will need GNU binutils 2.15 or newer.
966 1.10 mrg
967 1.10 mrg <p><hr /><a name="powerpc-x-darwin"></a>
968 1.10 mrg
969 1.10 mrg <h3 class="heading"><a name="TOC42"></a>powerpc-*-darwin*</h3>
970 1.10 mrg
971 1.1 mrg <p>PowerPC running Darwin (Mac OS X kernel).
972 1.10 mrg
973 1.10 mrg <p>Pre-installed versions of Mac OS X may not include any developer tools,
974 1.1 mrg meaning that you will not be able to build GCC from source. Tool
975 1.1 mrg binaries are available at
976 1.10 mrg <a href="https://opensource.apple.com">https://opensource.apple.com</a>.
977 1.10 mrg
978 1.10 mrg <p>This version of GCC requires at least cctools-590.36. The
979 1.1 mrg cctools-590.36 package referenced from
980 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
981 1.1 mrg on systems older than 10.3.9 (aka darwin7.9.0).
982 1.10 mrg
983 1.10 mrg <p><hr /><a name="powerpc-x-elf"></a>
984 1.10 mrg
985 1.10 mrg <h3 class="heading"><a name="TOC43"></a>powerpc-*-elf</h3>
986 1.10 mrg
987 1.1 mrg <p>PowerPC system in big endian mode, running System V.4.
988 1.10 mrg
989 1.10 mrg <p><hr /><a name="powerpc-x-linux-gnu"></a>
990 1.10 mrg
991 1.10 mrg <h3 class="heading"><a name="TOC44"></a>powerpc*-*-linux-gnu*</h3>
992 1.10 mrg
993 1.1 mrg <p>PowerPC system in big endian mode running Linux.
994 1.10 mrg
995 1.10 mrg <p><hr /><a name="powerpc-x-netbsd"></a>
996 1.10 mrg
997 1.10 mrg <h3 class="heading"><a name="TOC45"></a>powerpc-*-netbsd*</h3>
998 1.10 mrg
999 1.1 mrg <p>PowerPC system in big endian mode running NetBSD.
1000 1.10 mrg
1001 1.10 mrg <p><hr /><a name="powerpc-x-eabisim"></a>
1002 1.10 mrg
1003 1.10 mrg <h3 class="heading"><a name="TOC46"></a>powerpc-*-eabisim</h3>
1004 1.10 mrg
1005 1.1 mrg <p>Embedded PowerPC system in big endian mode for use in running under the
1006 1.1 mrg PSIM simulator.
1007 1.10 mrg
1008 1.10 mrg <p><hr /><a name="powerpc-x-eabi"></a>
1009 1.10 mrg
1010 1.10 mrg <h3 class="heading"><a name="TOC47"></a>powerpc-*-eabi</h3>
1011 1.10 mrg
1012 1.1 mrg <p>Embedded PowerPC system in big endian mode.
1013 1.10 mrg
1014 1.10 mrg <p><hr /><a name="powerpcle-x-elf"></a>
1015 1.10 mrg
1016 1.10 mrg <h3 class="heading"><a name="TOC48"></a>powerpcle-*-elf</h3>
1017 1.10 mrg
1018 1.1 mrg <p>PowerPC system in little endian mode, running System V.4.
1019 1.10 mrg
1020 1.10 mrg <p><hr /><a name="powerpcle-x-eabisim"></a>
1021 1.10 mrg
1022 1.10 mrg <h3 class="heading"><a name="TOC49"></a>powerpcle-*-eabisim</h3>
1023 1.10 mrg
1024 1.1 mrg <p>Embedded PowerPC system in little endian mode for use in running under
1025 1.1 mrg the PSIM simulator.
1026 1.10 mrg
1027 1.10 mrg <p><hr /><a name="powerpcle-x-eabi"></a>
1028 1.10 mrg
1029 1.10 mrg <h3 class="heading"><a name="TOC50"></a>powerpcle-*-eabi</h3>
1030 1.10 mrg
1031 1.1 mrg <p>Embedded PowerPC system in little endian mode.
1032 1.10 mrg
1033 1.10 mrg <p><hr /><a name="rl78-x-elf"></a>
1034 1.10 mrg
1035 1.10 mrg <h3 class="heading"><a name="TOC51"></a>rl78-*-elf</h3>
1036 1.10 mrg
1037 1.10 mrg <p>The Renesas RL78 processor.
1038 1.3 mrg This configuration is intended for embedded systems.
1039 1.10 mrg
1040 1.10 mrg <p><hr /><a name="riscv32-x-elf"></a>
1041 1.10 mrg
1042 1.10 mrg <h3 class="heading"><a name="TOC52"></a>riscv32-*-elf</h3>
1043 1.10 mrg
1044 1.10 mrg <p>The RISC-V RV32 instruction set.
1045 1.10 mrg This configuration is intended for embedded systems.
1046 1.10 mrg This (and all other RISC-V) targets are supported upstream as of the
1047 1.10 mrg binutils 2.28 release.
1048 1.10 mrg
1049 1.10 mrg <p><hr /><a name="riscv32-x-linux"></a>
1050 1.10 mrg
1051 1.10 mrg <h3 class="heading"><a name="TOC53"></a>riscv32-*-linux</h3>
1052 1.10 mrg
1053 1.10 mrg <p>The RISC-V RV32 instruction set running GNU/Linux.
1054 1.10 mrg This (and all other RISC-V) targets are supported upstream as of the
1055 1.10 mrg binutils 2.28 release.
1056 1.10 mrg
1057 1.10 mrg <p><hr /><a name="riscv64-x-elf"></a>
1058 1.10 mrg
1059 1.10 mrg <h3 class="heading"><a name="TOC54"></a>riscv64-*-elf</h3>
1060 1.10 mrg
1061 1.10 mrg <p>The RISC-V RV64 instruction set.
1062 1.10 mrg This configuration is intended for embedded systems.
1063 1.10 mrg This (and all other RISC-V) targets are supported upstream as of the
1064 1.10 mrg binutils 2.28 release.
1065 1.10 mrg
1066 1.10 mrg <p><hr /><a name="riscv64-x-linux"></a>
1067 1.10 mrg
1068 1.10 mrg <h3 class="heading"><a name="TOC55"></a>riscv64-*-linux</h3>
1069 1.10 mrg
1070 1.10 mrg <p>The RISC-V RV64 instruction set running GNU/Linux.
1071 1.10 mrg This (and all other RISC-V) targets are supported upstream as of the
1072 1.10 mrg binutils 2.28 release.
1073 1.10 mrg
1074 1.10 mrg <p><hr /><a name="rx-x-elf"></a>
1075 1.10 mrg
1076 1.10 mrg <h3 class="heading"><a name="TOC56"></a>rx-*-elf</h3>
1077 1.10 mrg
1078 1.10 mrg <p>The Renesas RX processor.
1079 1.10 mrg
1080 1.10 mrg <p><hr /><a name="s390-x-linux"></a>
1081 1.10 mrg
1082 1.10 mrg <h3 class="heading"><a name="TOC57"></a>s390-*-linux*</h3>
1083 1.10 mrg
1084 1.1 mrg <p>S/390 system running GNU/Linux for S/390.
1085 1.10 mrg
1086 1.10 mrg <p><hr /><a name="s390x-x-linux"></a>
1087 1.10 mrg
1088 1.10 mrg <h3 class="heading"><a name="TOC58"></a>s390x-*-linux*</h3>
1089 1.10 mrg
1090 1.1 mrg <p>zSeries system (64-bit) running GNU/Linux for zSeries.
1091 1.10 mrg
1092 1.10 mrg <p><hr /><a name="s390x-ibm-tpf"></a>
1093 1.10 mrg
1094 1.10 mrg <h3 class="heading"><a name="TOC59"></a>s390x-ibm-tpf*</h3>
1095 1.10 mrg
1096 1.1 mrg <p>zSeries system (64-bit) running TPF. This platform is
1097 1.1 mrg supported as cross-compilation target only.
1098 1.10 mrg
1099 1.10 mrg <p><hr /><!-- Please use Solaris 2 to refer to all release of Solaris, starting -->
1100 1.10 mrg <!-- with 2.0 until 2.6, 7, 8, etc. Solaris 1 was a marketing name for -->
1101 1.10 mrg <!-- SunOS 4 releases which we don't use to avoid confusion. Solaris -->
1102 1.10 mrg <!-- alone is too unspecific and must be avoided. -->
1103 1.10 mrg <a name="x-x-solaris2"></a>
1104 1.10 mrg
1105 1.10 mrg <h3 class="heading"><a name="TOC60"></a>*-*-solaris2*</h3>
1106 1.10 mrg
1107 1.6 mrg <p>Support for Solaris 9 has been removed in GCC 5. Support for Solaris
1108 1.5 mrg 8 has been removed in GCC 4.8. Support for Solaris 7 has been removed
1109 1.5 mrg in GCC 4.6.
1110 1.10 mrg
1111 1.10 mrg <p>Sun does not ship a C compiler with Solaris 2 before Solaris 10, though
1112 1.3 mrg you can download the Sun Studio compilers for free. In Solaris 10 and
1113 1.10 mrg 11, GCC 3.4.3 is available as <samp><span class="command">/usr/sfw/bin/gcc</span></samp>. Solaris 11
1114 1.7 mrg also provides GCC 4.5.2, 4.7.3, and 4.8.2 as
1115 1.10 mrg <samp><span class="command">/usr/gcc/4.5/bin/gcc</span></samp> or similar. Alternatively,
1116 1.1 mrg you can install a pre-built GCC to bootstrap and install GCC. See the
1117 1.1 mrg <a href="binaries.html">binaries page</a> for details.
1118 1.1 mrg
1119 1.10 mrg <p>The Solaris 2 <samp><span class="command">/bin/sh</span></samp> will often fail to configure
1120 1.10 mrg ‘<samp><span class="samp">libstdc++-v3</span></samp>’or ‘<samp><span class="samp">boehm-gc</span></samp>’. We therefore recommend using the
1121 1.10 mrg following initial sequence of commands
1122 1.10 mrg
1123 1.10 mrg <pre class="smallexample"> % CONFIG_SHELL=/bin/ksh
1124 1.10 mrg % export CONFIG_SHELL
1125 1.10 mrg </pre>
1126 1.10 mrg <p class="noindent">and proceed as described in <a href="configure.html">the configure instructions</a>.
1127 1.1 mrg In addition we strongly recommend specifying an absolute path to invoke
1128 1.10 mrg <samp><var>srcdir</var><span class="command">/configure</span></samp>.
1129 1.10 mrg
1130 1.10 mrg <p>Solaris 10 comes with a number of optional OS packages. Some of these
1131 1.1 mrg are needed to use GCC fully, namely <code>SUNWarc</code>,
1132 1.1 mrg <code>SUNWbtool</code>, <code>SUNWesu</code>, <code>SUNWhea</code>, <code>SUNWlibm</code>,
1133 1.1 mrg <code>SUNWsprot</code>, and <code>SUNWtoo</code>. If you did not install all
1134 1.7 mrg optional packages when installing Solaris 10, you will need to verify that
1135 1.10 mrg the packages that GCC needs are installed.
1136 1.7 mrg To check whether an optional package is installed, use
1137 1.10 mrg the <samp><span class="command">pkginfo</span></samp> command. To add an optional package, use the
1138 1.10 mrg <samp><span class="command">pkgadd</span></samp> command. For further details, see the Solaris 10
1139 1.1 mrg documentation.
1140 1.10 mrg
1141 1.10 mrg <p>Starting with Solaris 11, the package management has changed, so you
1142 1.7 mrg need to check for <code>system/header</code>, <code>system/linker</code>, and
1143 1.7 mrg <code>developer/assembler</code> packages. Checking for and installing
1144 1.10 mrg packages is done with the <samp><span class="command">pkg</span></samp> command now.
1145 1.10 mrg
1146 1.10 mrg <p>Trying to use the linker and other tools in
1147 1.10 mrg <samp><span class="file">/usr/ucb</span></samp> to install GCC has been observed to cause trouble.
1148 1.1 mrg For example, the linker may hang indefinitely. The fix is to remove
1149 1.10 mrg <samp><span class="file">/usr/ucb</span></samp> from your <samp><span class="env">PATH</span></samp>.
1150 1.10 mrg
1151 1.10 mrg <p>The build process works more smoothly with the legacy Sun tools so, if you
1152 1.10 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
1153 1.10 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.
1154 1.10 mrg
1155 1.10 mrg <p>We recommend the use of the Solaris assembler or the GNU assembler, in
1156 1.10 mrg conjunction with the Solaris linker. The GNU <samp><span class="command">as</span></samp>
1157 1.7 mrg versions included in Solaris 10, from GNU binutils 2.15 (in
1158 1.10 mrg <samp><span class="file">/usr/sfw/bin/gas</span></samp>), and Solaris 11,
1159 1.10 mrg from GNU binutils 2.19 or newer (also in <samp><span class="file">/usr/bin/gas</span></samp> and
1160 1.10 mrg <samp><span class="file">/usr/gnu/bin/as</span></samp>), are known to work.
1161 1.7 mrg Current versions of GNU binutils (2.26)
1162 1.7 mrg are known to work as well, with the caveat mentioned in
1163 1.7 mrg <a href="#ix86-x-solaris210">i?86-*-solaris2.10</a> . Note that your mileage may vary
1164 1.7 mrg if you use a combination of the GNU tools and the Solaris tools: while the
1165 1.10 mrg combination GNU <samp><span class="command">as</span></samp> + Sun <samp><span class="command">ld</span></samp> should reasonably work,
1166 1.10 mrg the reverse combination Sun <samp><span class="command">as</span></samp> + GNU <samp><span class="command">ld</span></samp> may fail to
1167 1.10 mrg build or cause memory corruption at runtime in some cases for C++ programs.
1168 1.10 mrg <!-- FIXME: still? -->
1169 1.10 mrg GNU <samp><span class="command">ld</span></samp> usually works as well, although the version included in
1170 1.1 mrg Solaris 10 cannot be used due to several bugs. Again, the current
1171 1.7 mrg version (2.26) is known to work, but generally lacks platform specific
1172 1.10 mrg features, so better stay with Solaris <samp><span class="command">ld</span></samp>. To use the LTO linker
1173 1.10 mrg plugin (<samp><span class="option">-fuse-linker-plugin</span></samp>) with GNU <samp><span class="command">ld</span></samp>, GNU
1174 1.10 mrg binutils <em>must</em> be configured with <samp><span class="option">--enable-largefile</span></samp>.
1175 1.10 mrg
1176 1.10 mrg <p>To enable symbol versioning in ‘<samp><span class="samp">libstdc++</span></samp>’ with the Solaris linker,
1177 1.10 mrg you need to have any version of GNU <samp><span class="command">c++filt</span></samp>, which is part of
1178 1.10 mrg GNU binutils. ‘<samp><span class="samp">libstdc++</span></samp>’ symbol versioning will be disabled if no
1179 1.10 mrg appropriate version is found. Solaris <samp><span class="command">c++filt</span></samp> from the Solaris
1180 1.7 mrg Studio compilers does <em>not</em> work.
1181 1.10 mrg
1182 1.10 mrg <p>Sun bug 4927647 sometimes causes random spurious testsuite failures
1183 1.10 mrg related to missing diagnostic output. This bug doesn't affect GCC
1184 1.10 mrg itself, rather it is a kernel bug triggered by the <samp><span class="command">expect</span></samp>
1185 1.1 mrg program which is used only by the GCC testsuite driver. When the bug
1186 1.10 mrg causes the <samp><span class="command">expect</span></samp> program to miss anticipated output, extra
1187 1.1 mrg testsuite failures appear.
1188 1.10 mrg
1189 1.10 mrg <p><hr /><a name="sparc-x-x"></a>
1190 1.10 mrg
1191 1.10 mrg <h3 class="heading"><a name="TOC61"></a>sparc*-*-*</h3>
1192 1.10 mrg
1193 1.3 mrg <p>This section contains general configuration information for all
1194 1.3 mrg SPARC-based platforms. In addition to reading this section, please
1195 1.3 mrg read all other sections that match your target.
1196 1.10 mrg
1197 1.10 mrg <p>Newer versions of the GNU Multiple Precision Library (GMP), the MPFR
1198 1.3 mrg library and the MPC library are known to be miscompiled by earlier
1199 1.3 mrg versions of GCC on these platforms. We therefore recommend the use
1200 1.3 mrg of the exact versions of these libraries listed as minimal versions
1201 1.3 mrg in <a href="prerequisites.html">the prerequisites</a>.
1202 1.10 mrg
1203 1.10 mrg <p><hr /><a name="sparc-sun-solaris2"></a>
1204 1.10 mrg
1205 1.10 mrg <h3 class="heading"><a name="TOC62"></a>sparc-sun-solaris2*</h3>
1206 1.10 mrg
1207 1.1 mrg <p>When GCC is configured to use GNU binutils 2.14 or later, the binaries
1208 1.10 mrg produced are smaller than the ones produced using Sun's native tools;
1209 1.1 mrg this difference is quite significant for binaries containing debugging
1210 1.1 mrg information.
1211 1.10 mrg
1212 1.10 mrg <p>Starting with Solaris 7, the operating system is capable of executing
1213 1.1 mrg 64-bit SPARC V9 binaries. GCC 3.1 and later properly supports
1214 1.10 mrg this; the <samp><span class="option">-m64</span></samp> option enables 64-bit code generation.
1215 1.1 mrg However, if all you want is code tuned for the UltraSPARC CPU, you
1216 1.10 mrg should try the <samp><span class="option">-mtune=ultrasparc</span></samp> option instead, which produces
1217 1.1 mrg code that, unlike full 64-bit code, can still run on non-UltraSPARC
1218 1.1 mrg machines.
1219 1.10 mrg
1220 1.10 mrg <p>When configuring the GNU Multiple Precision Library (GMP), the MPFR
1221 1.3 mrg library or the MPC library on a Solaris 7 or later system, the canonical
1222 1.10 mrg target triplet must be specified as the <samp><span class="command">build</span></samp> parameter on the
1223 1.10 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
1224 1.3 mrg not that of GMP or MPFR or MPC). For example on a Solaris 9 system:
1225 1.10 mrg
1226 1.10 mrg <pre class="smallexample"> % ./configure --build=sparc-sun-solaris2.9 --prefix=xxx
1227 1.10 mrg </pre>
1228 1.10 mrg <p><hr /><a name="sparc-sun-solaris210"></a>
1229 1.10 mrg
1230 1.10 mrg <h3 class="heading"><a name="TOC63"></a>sparc-sun-solaris2.10</h3>
1231 1.10 mrg
1232 1.1 mrg <p>There is a bug in older versions of the Sun assembler which breaks
1233 1.1 mrg thread-local storage (TLS). A typical error message is
1234 1.10 mrg
1235 1.10 mrg <pre class="smallexample"> ld: fatal: relocation error: R_SPARC_TLS_LE_HIX22: file /var/tmp//ccamPA1v.o:
1236 1.10 mrg symbol <unknown>: bad symbol type SECT: symbol type must be TLS
1237 1.10 mrg </pre>
1238 1.10 mrg <p class="noindent">This bug is fixed in Sun patch 118683-03 or later.
1239 1.10 mrg
1240 1.10 mrg <p><hr /><a name="sparc-x-linux"></a>
1241 1.10 mrg
1242 1.10 mrg <h3 class="heading"><a name="TOC64"></a>sparc-*-linux*</h3>
1243 1.10 mrg
1244 1.10 mrg <p><hr /><a name="sparc64-x-solaris2"></a>
1245 1.10 mrg
1246 1.10 mrg <h3 class="heading"><a name="TOC65"></a>sparc64-*-solaris2*</h3>
1247 1.10 mrg
1248 1.3 mrg <p>When configuring the GNU Multiple Precision Library (GMP), the MPFR
1249 1.3 mrg library or the MPC library, the canonical target triplet must be specified
1250 1.10 mrg as the <samp><span class="command">build</span></samp> parameter on the configure line. For example
1251 1.3 mrg on a Solaris 9 system:
1252 1.10 mrg
1253 1.10 mrg <pre class="smallexample"> % ./configure --build=sparc64-sun-solaris2.9 --prefix=xxx
1254 1.10 mrg </pre>
1255 1.10 mrg <p><hr /><a name="sparcv9-x-solaris2"></a>
1256 1.10 mrg
1257 1.10 mrg <h3 class="heading"><a name="TOC66"></a>sparcv9-*-solaris2*</h3>
1258 1.10 mrg
1259 1.10 mrg <p>This is a synonym for ‘<samp><span class="samp">sparc64-*-solaris2*</span></samp>’.
1260 1.10 mrg
1261 1.10 mrg <p><hr /><a name="c6x-x-x"></a>
1262 1.10 mrg
1263 1.10 mrg <h3 class="heading"><a name="TOC67"></a>c6x-*-*</h3>
1264 1.10 mrg
1265 1.3 mrg <p>The C6X family of processors. This port requires binutils-2.22 or newer.
1266 1.10 mrg
1267 1.10 mrg <p><hr /><a name="tilegx-*-linux"></a>
1268 1.10 mrg
1269 1.10 mrg <h3 class="heading"><a name="TOC68"></a>tilegx-*-linux*</h3>
1270 1.10 mrg
1271 1.5 mrg <p>The TILE-Gx processor in little endian mode, running GNU/Linux. This
1272 1.5 mrg port requires binutils-2.22 or newer.
1273 1.10 mrg
1274 1.10 mrg <p><hr /><a name="tilegxbe-*-linux"></a>
1275 1.10 mrg
1276 1.10 mrg <h3 class="heading"><a name="TOC69"></a>tilegxbe-*-linux*</h3>
1277 1.10 mrg
1278 1.5 mrg <p>The TILE-Gx processor in big endian mode, running GNU/Linux. This
1279 1.5 mrg port requires binutils-2.23 or newer.
1280 1.10 mrg
1281 1.10 mrg <p><hr /><a name="tilepro-*-linux"></a>
1282 1.10 mrg
1283 1.10 mrg <h3 class="heading"><a name="TOC70"></a>tilepro-*-linux*</h3>
1284 1.10 mrg
1285 1.3 mrg <p>The TILEPro processor running GNU/Linux. This port requires
1286 1.3 mrg binutils-2.22 or newer.
1287 1.10 mrg
1288 1.10 mrg <p><hr /><a name="visium-x-elf"></a>
1289 1.10 mrg
1290 1.10 mrg <h3 class="heading"><a name="TOC71"></a>visium-*-elf</h3>
1291 1.10 mrg
1292 1.10 mrg <p>CDS VISIUMcore processor.
1293 1.5 mrg This configuration is intended for embedded systems.
1294 1.10 mrg
1295 1.10 mrg <p><hr /><a name="x-x-vxworks"></a>
1296 1.10 mrg
1297 1.10 mrg <h3 class="heading"><a name="TOC72"></a>*-*-vxworks*</h3>
1298 1.10 mrg
1299 1.1 mrg <p>Support for VxWorks is in flux. At present GCC supports <em>only</em> the
1300 1.10 mrg very recent VxWorks 5.5 (aka Tornado 2.2) release, and only on PowerPC.
1301 1.10 mrg We welcome patches for other architectures supported by VxWorks 5.5.
1302 1.1 mrg Support for VxWorks AE would also be welcome; we believe this is merely
1303 1.1 mrg a matter of writing an appropriate “configlette” (see below). We are
1304 1.1 mrg not interested in supporting older, a.out or COFF-based, versions of
1305 1.1 mrg VxWorks in GCC 3.
1306 1.10 mrg
1307 1.10 mrg <p>VxWorks comes with an older version of GCC installed in
1308 1.10 mrg <samp><var>$WIND_BASE</var><span class="file">/host</span></samp>; we recommend you do not overwrite it.
1309 1.10 mrg Choose an installation <var>prefix</var> entirely outside <var>$WIND_BASE</var>.
1310 1.10 mrg Before running <samp><span class="command">configure</span></samp>, create the directories <samp><var>prefix</var></samp>
1311 1.10 mrg and <samp><var>prefix</var><span class="file">/bin</span></samp>. Link or copy the appropriate assembler,
1312 1.10 mrg linker, etc. into <samp><var>prefix</var><span class="file">/bin</span></samp>, and set your <var>PATH</var> to
1313 1.10 mrg include that directory while running both <samp><span class="command">configure</span></samp> and
1314 1.10 mrg <samp><span class="command">make</span></samp>.
1315 1.10 mrg
1316 1.10 mrg <p>You must give <samp><span class="command">configure</span></samp> the
1317 1.10 mrg <samp><span class="option">--with-headers=</span><var>$WIND_BASE</var><span class="option">/target/h</span></samp> switch so that it can
1318 1.1 mrg find the VxWorks system headers. Since VxWorks is a cross compilation
1319 1.10 mrg target only, you must also specify <samp><span class="option">--target=</span><var>target</var></samp>.
1320 1.10 mrg <samp><span class="command">configure</span></samp> will attempt to create the directory
1321 1.10 mrg <samp><var>prefix</var><span class="file">/</span><var>target</var><span class="file">/sys-include</span></samp> and copy files into it;
1322 1.10 mrg make sure the user running <samp><span class="command">configure</span></samp> has sufficient privilege
1323 1.1 mrg to do so.
1324 1.10 mrg
1325 1.10 mrg <p>GCC's exception handling runtime requires a special “configlette”
1326 1.10 mrg module, <samp><span class="file">contrib/gthr_supp_vxw_5x.c</span></samp>. Follow the instructions in
1327 1.1 mrg that file to add the module to your kernel build. (Future versions of
1328 1.1 mrg VxWorks will incorporate this module.)
1329 1.10 mrg
1330 1.10 mrg <p><hr /><a name="x86-64-x-x"></a>
1331 1.10 mrg
1332 1.10 mrg <h3 class="heading"><a name="TOC73"></a>x86_64-*-*, amd64-*-*</h3>
1333 1.10 mrg
1334 1.1 mrg <p>GCC supports the x86-64 architecture implemented by the AMD64 processor
1335 1.10 mrg (amd64-*-* is an alias for x86_64-*-*) on GNU/Linux, FreeBSD and NetBSD.
1336 1.1 mrg On GNU/Linux the default is a bi-arch compiler which is able to generate
1337 1.10 mrg both 64-bit x86-64 and 32-bit x86 code (via the <samp><span class="option">-m32</span></samp> switch).
1338 1.10 mrg
1339 1.10 mrg <p><hr /><a name="x86-64-x-solaris210"></a>
1340 1.10 mrg
1341 1.10 mrg <h3 class="heading"><a name="TOC74"></a>x86_64-*-solaris2.1[0-9]*</h3>
1342 1.10 mrg
1343 1.3 mrg <p>GCC also supports the x86-64 architecture implemented by the AMD64
1344 1.10 mrg processor (‘<samp><span class="samp">amd64-*-*</span></samp>’ is an alias for ‘<samp><span class="samp">x86_64-*-*</span></samp>’) on
1345 1.3 mrg Solaris 10 or later. Unlike other systems, without special options a
1346 1.3 mrg bi-arch compiler is built which generates 32-bit code by default, but
1347 1.10 mrg can generate 64-bit x86-64 code with the <samp><span class="option">-m64</span></samp> switch. Since
1348 1.7 mrg GCC 4.7, there is also a configuration that defaults to 64-bit code, but
1349 1.10 mrg can generate 32-bit code with <samp><span class="option">-m32</span></samp>. To configure and build
1350 1.10 mrg this way, you have to provide all support libraries like <samp><span class="file">libgmp</span></samp>
1351 1.10 mrg as 64-bit code, configure with <samp><span class="option">--target=x86_64-pc-solaris2.1x</span></samp>
1352 1.10 mrg and ‘<samp><span class="samp">CC=gcc -m64</span></samp>’.
1353 1.10 mrg
1354 1.10 mrg <p><hr /><a name="xtensa-x-elf"></a>
1355 1.10 mrg
1356 1.10 mrg <h3 class="heading"><a name="TOC75"></a>xtensa*-*-elf</h3>
1357 1.10 mrg
1358 1.1 mrg <p>This target is intended for embedded Xtensa systems using the
1359 1.10 mrg ‘<samp><span class="samp">newlib</span></samp>’ C library. It uses ELF but does not support shared
1360 1.1 mrg objects. Designed-defined instructions specified via the
1361 1.1 mrg Tensilica Instruction Extension (TIE) language are only supported
1362 1.1 mrg through inline assembly.
1363 1.10 mrg
1364 1.10 mrg <p>The Xtensa configuration information must be specified prior to
1365 1.10 mrg building GCC. The <samp><span class="file">include/xtensa-config.h</span></samp> header
1366 1.1 mrg file contains the configuration information. If you created your
1367 1.1 mrg own Xtensa configuration with the Xtensa Processor Generator, the
1368 1.1 mrg downloaded files include a customized copy of this header file,
1369 1.1 mrg which you can use to replace the default header file.
1370 1.10 mrg
1371 1.10 mrg <p><hr /><a name="xtensa-x-linux"></a>
1372 1.10 mrg
1373 1.10 mrg <h3 class="heading"><a name="TOC76"></a>xtensa*-*-linux*</h3>
1374 1.10 mrg
1375 1.1 mrg <p>This target is for Xtensa systems running GNU/Linux. It supports ELF
1376 1.1 mrg shared objects and the GNU C library (glibc). It also generates
1377 1.1 mrg position-independent code (PIC) regardless of whether the
1378 1.10 mrg <samp><span class="option">-fpic</span></samp> or <samp><span class="option">-fPIC</span></samp> options are used. In other
1379 1.1 mrg respects, this target is the same as the
1380 1.10 mrg <a href="#xtensa*-*-elf">‘<samp><span class="samp">xtensa*-*-elf</span></samp>’</a> target.
1381 1.10 mrg
1382 1.10 mrg <p><hr /><a name="windows"></a>
1383 1.10 mrg
1384 1.10 mrg <h3 class="heading"><a name="TOC77"></a>Microsoft Windows</h3>
1385 1.10 mrg
1386 1.10 mrg <h4 class="subheading"><a name="TOC78"></a>Intel 16-bit versions</h4>
1387 1.1 mrg
1388 1.1 mrg <p>The 16-bit versions of Microsoft Windows, such as Windows 3.1, are not
1389 1.1 mrg supported.
1390 1.10 mrg
1391 1.10 mrg <p>However, the 32-bit port has limited support for Microsoft
1392 1.1 mrg Windows 3.11 in the Win32s environment, as a target only. See below.
1393 1.10 mrg
1394 1.10 mrg <h4 class="subheading"><a name="TOC79"></a>Intel 32-bit versions</h4>
1395 1.10 mrg
1396 1.1 mrg <p>The 32-bit versions of Windows, including Windows 95, Windows NT, Windows
1397 1.1 mrg XP, and Windows Vista, are supported by several different target
1398 1.1 mrg platforms. These targets differ in which Windows subsystem they target
1399 1.1 mrg and which C libraries are used.
1400 1.1 mrg
1401 1.10 mrg <ul>
1402 1.10 mrg <li>Cygwin <a href="#x-x-cygwin">*-*-cygwin</a>: Cygwin provides a user-space
1403 1.10 mrg Linux API emulation layer in the Win32 subsystem.
1404 1.10 mrg <li>MinGW <a href="#x-x-mingw32">*-*-mingw32</a>: MinGW is a native GCC port for
1405 1.10 mrg the Win32 subsystem that provides a subset of POSIX.
1406 1.10 mrg <li>MKS i386-pc-mks: NuTCracker from MKS. See
1407 1.10 mrg <a href="http://www.mkssoftware.com/">http://www.mkssoftware.com/</a> for more information.
1408 1.10 mrg </ul>
1409 1.10 mrg
1410 1.10 mrg <h4 class="subheading"><a name="TOC80"></a>Intel 64-bit versions</h4>
1411 1.10 mrg
1412 1.1 mrg <p>GCC contains support for x86-64 using the mingw-w64
1413 1.10 mrg runtime library, available from <a href="http://mingw-w64.org/doku.php">http://mingw-w64.org/doku.php</a>.
1414 1.1 mrg This library should be used with the target triple x86_64-pc-mingw32.
1415 1.10 mrg
1416 1.10 mrg <p>Presently Windows for Itanium is not supported.
1417 1.10 mrg
1418 1.10 mrg <h4 class="subheading"><a name="TOC81"></a>Windows CE</h4>
1419 1.10 mrg
1420 1.3 mrg <p>Windows CE is supported as a target only on Hitachi
1421 1.1 mrg SuperH (sh-wince-pe), and MIPS (mips-wince-pe).
1422 1.10 mrg
1423 1.10 mrg <h4 class="subheading"><a name="TOC82"></a>Other Windows Platforms</h4>
1424 1.10 mrg
1425 1.1 mrg <p>GCC no longer supports Windows NT on the Alpha or PowerPC.
1426 1.10 mrg
1427 1.10 mrg <p>GCC no longer supports the Windows POSIX subsystem. However, it does
1428 1.1 mrg support the Interix subsystem. See above.
1429 1.10 mrg
1430 1.10 mrg <p>Old target names including *-*-winnt and *-*-windowsnt are no longer used.
1431 1.10 mrg
1432 1.10 mrg <p>PW32 (i386-pc-pw32) support was never completed, and the project seems to
1433 1.1 mrg be inactive. See <a href="http://pw32.sourceforge.net/">http://pw32.sourceforge.net/</a> for more information.
1434 1.10 mrg
1435 1.10 mrg <p>UWIN support has been removed due to a lack of maintenance.
1436 1.10 mrg
1437 1.10 mrg <p><hr /><a name="x-x-cygwin"></a>
1438 1.10 mrg
1439 1.10 mrg <h3 class="heading"><a name="TOC83"></a>*-*-cygwin</h3>
1440 1.10 mrg
1441 1.1 mrg <p>Ports of GCC are included with the
1442 1.1 mrg <a href="http://www.cygwin.com/">Cygwin environment</a>.
1443 1.10 mrg
1444 1.10 mrg <p>GCC will build under Cygwin without modification; it does not build
1445 1.10 mrg with Microsoft's C++ compiler and there are no plans to make it do so.
1446 1.10 mrg
1447 1.10 mrg <p>The Cygwin native compiler can be configured to target any 32-bit x86
1448 1.1 mrg cpu architecture desired; the default is i686-pc-cygwin. It should be
1449 1.1 mrg used with as up-to-date a version of binutils as possible; use either
1450 1.1 mrg the latest official GNU binutils release in the Cygwin distribution,
1451 1.1 mrg or version 2.20 or above if building your own.
1452 1.10 mrg
1453 1.10 mrg <p><hr /><a name="x-x-mingw32"></a>
1454 1.10 mrg
1455 1.10 mrg <h3 class="heading"><a name="TOC84"></a>*-*-mingw32</h3>
1456 1.10 mrg
1457 1.10 mrg <p>GCC will build with and support only MinGW runtime 3.12 and later.
1458 1.1 mrg Earlier versions of headers are incompatible with the new default semantics
1459 1.1 mrg of <code>extern inline</code> in <code>-std=c99</code> and <code>-std=gnu99</code> modes.
1460 1.10 mrg
1461 1.10 mrg <p><hr /><a name="older"></a>
1462 1.10 mrg
1463 1.10 mrg <h3 class="heading"><a name="TOC85"></a>Older systems</h3>
1464 1.10 mrg
1465 1.1 mrg <p>GCC contains support files for many older (1980s and early
1466 1.1 mrg 1990s) Unix variants. For the most part, support for these systems
1467 1.1 mrg has not been deliberately removed, but it has not been maintained for
1468 1.1 mrg several years and may suffer from bitrot.
1469 1.10 mrg
1470 1.10 mrg <p>Starting with GCC 3.1, each release has a list of “obsoleted” systems.
1471 1.1 mrg Support for these systems is still present in that release, but
1472 1.10 mrg <samp><span class="command">configure</span></samp> will fail unless the <samp><span class="option">--enable-obsolete</span></samp>
1473 1.1 mrg option is given. Unless a maintainer steps forward, support for these
1474 1.1 mrg systems will be removed from the next release of GCC.
1475 1.10 mrg
1476 1.10 mrg <p>Support for old systems as hosts for GCC can cause problems if the
1477 1.1 mrg workarounds for compiler, library and operating system bugs affect the
1478 1.1 mrg cleanliness or maintainability of the rest of GCC. In some cases, to
1479 1.1 mrg bring GCC up on such a system, if still possible with current GCC, may
1480 1.1 mrg require first installing an old version of GCC which did work on that
1481 1.1 mrg system, and using it to compile a more recent GCC, to avoid bugs in the
1482 1.1 mrg vendor compiler. Old releases of GCC 1 and GCC 2 are available in the
1483 1.10 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
1484 1.10 mrg <samp><span class="command">fixincludes</span></samp>, but bugs or deficiencies in libraries and the
1485 1.1 mrg operating system may still cause problems.
1486 1.10 mrg
1487 1.10 mrg <p>Support for older systems as targets for cross-compilation is less
1488 1.1 mrg problematic than support for them as hosts for GCC; if an enthusiast
1489 1.1 mrg wishes to make such a target work again (including resurrecting any of
1490 1.1 mrg the targets that never worked with GCC 2, starting from the last
1491 1.1 mrg version before they were removed), patches
1492 1.1 mrg <a href="../contribute.html">following the usual requirements</a> would be
1493 1.1 mrg likely to be accepted, since they should not affect the support for more
1494 1.1 mrg modern targets.
1495 1.10 mrg
1496 1.10 mrg <p>For some systems, old versions of GNU binutils may also be useful,
1497 1.10 mrg and are available from <samp><span class="file">pub/binutils/old-releases</span></samp> on
1498 1.10 mrg <a href="https://sourceware.org/mirrors.html">sourceware.org mirror sites</a>.
1499 1.10 mrg
1500 1.10 mrg <p>Some of the information on specific systems above relates to
1501 1.1 mrg such older systems, but much of the information
1502 1.1 mrg about GCC on such systems (which may no longer be applicable to
1503 1.1 mrg current GCC) is to be found in the GCC texinfo manual.
1504 1.10 mrg
1505 1.10 mrg <p><hr /><a name="elf"></a>
1506 1.10 mrg
1507 1.10 mrg <h3 class="heading"><a name="TOC86"></a>all ELF targets (SVR4, Solaris 2, etc.)</h3>
1508 1.10 mrg
1509 1.1 mrg <p>C++ support is significantly better on ELF targets if you use the
1510 1.1 mrg <a href="./configure.html#with-gnu-ld">GNU linker</a>; duplicate copies of
1511 1.1 mrg inlines, vtables and template instantiations will be discarded
1512 1.1 mrg automatically.
1513 1.1 mrg
1514 1.10 mrg <p><hr />
1515 1.1 mrg <p><a href="./index.html">Return to the GCC Installation page</a>
1516 1.1 mrg
1517 1.10 mrg <!-- ***Old documentation****************************************************** -->
1518 1.10 mrg <!-- ***GFDL******************************************************************** -->
1519 1.10 mrg <!-- *************************************************************************** -->
1520 1.10 mrg <!-- Part 6 The End of the Document -->
1521 1.10 mrg </body></html>
1522 1.1 mrg
1523