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42 1.7 mrg <h1 class="settitle">Host/Target specific installation notes for GCC</h1>
43 1.7 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 1.7 mrg Please read this document carefully <em>before</em> installing the
45 1.7 mrg GNU Compiler Collection on your machine.
46 1.6 mrg
47 1.7 mrg <p>Note that this list of install notes is <em>not</em> a list of supported
48 1.7 mrg hosts or targets. Not all supported hosts and targets are listed
49 1.7 mrg here, only the ones that require host-specific or target-specific
50 1.7 mrg information have to.
51 1.6 mrg
52 1.7 mrg <ul>
53 1.7 mrg <li><a href="#aarch64-x-x">aarch64*-*-*</a>
54 1.7 mrg <li><a href="#alpha-x-x">alpha*-*-*</a>
55 1.7 mrg <li><a href="#alpha-dec-osf51">alpha*-dec-osf5.1</a>
56 1.7 mrg <li><a href="#amd64-x-solaris210">amd64-*-solaris2.10</a>
57 1.7 mrg <li><a href="#arm-x-eabi">arm-*-eabi</a>
58 1.7 mrg <li><a href="#avr">avr</a>
59 1.7 mrg <li><a href="#bfin">Blackfin</a>
60 1.7 mrg <li><a href="#dos">DOS</a>
61 1.7 mrg <li><a href="#x-x-freebsd">*-*-freebsd*</a>
62 1.7 mrg <li><a href="#h8300-hms">h8300-hms</a>
63 1.7 mrg <li><a href="#hppa-hp-hpux">hppa*-hp-hpux*</a>
64 1.7 mrg <li><a href="#hppa-hp-hpux10">hppa*-hp-hpux10</a>
65 1.7 mrg <li><a href="#hppa-hp-hpux11">hppa*-hp-hpux11</a>
66 1.7 mrg <li><a href="#x-x-linux-gnu">*-*-linux-gnu</a>
67 1.7 mrg <li><a href="#ix86-x-linux">i?86-*-linux*</a>
68 1.7 mrg <li><a href="#ix86-x-solaris210">i?86-*-solaris2.10</a>
69 1.7 mrg <li><a href="#ia64-x-linux">ia64-*-linux</a>
70 1.7 mrg <li><a href="#ia64-x-hpux">ia64-*-hpux*</a>
71 1.7 mrg <li><a href="#x-ibm-aix">*-ibm-aix*</a>
72 1.7 mrg <li><a href="#iq2000-x-elf">iq2000-*-elf</a>
73 1.7 mrg <li><a href="#lm32-x-elf">lm32-*-elf</a>
74 1.7 mrg <li><a href="#lm32-x-uclinux">lm32-*-uclinux</a>
75 1.7 mrg <li><a href="#m32c-x-elf">m32c-*-elf</a>
76 1.7 mrg <li><a href="#m32r-x-elf">m32r-*-elf</a>
77 1.7 mrg <li><a href="#m68k-x-x">m68k-*-*</a>
78 1.7 mrg <li><a href="#m68k-uclinux">m68k-uclinux</a>
79 1.7 mrg <li><a href="#mep-x-elf">mep-*-elf</a>
80 1.7 mrg <li><a href="#microblaze-x-elf">microblaze-*-elf</a>
81 1.7 mrg <li><a href="#mips-x-x">mips-*-*</a>
82 1.7 mrg <li><a href="#mips-sgi-irix5">mips-sgi-irix5</a>
83 1.7 mrg <li><a href="#mips-sgi-irix6">mips-sgi-irix6</a>
84 1.7 mrg <li><a href="#nds32le-x-elf">nds32le-*-elf</a>
85 1.7 mrg <li><a href="#nds32be-x-elf">nds32be-*-elf</a>
86 1.7 mrg <li><a href="#nvptx-x-none">nvptx-*-none</a>
87 1.7 mrg <li><a href="#powerpc-x-x">powerpc*-*-*</a>
88 1.7 mrg <li><a href="#powerpc-x-darwin">powerpc-*-darwin*</a>
89 1.7 mrg <li><a href="#powerpc-x-elf">powerpc-*-elf</a>
90 1.7 mrg <li><a href="#powerpc-x-linux-gnu">powerpc*-*-linux-gnu*</a>
91 1.7 mrg <li><a href="#powerpc-x-netbsd">powerpc-*-netbsd*</a>
92 1.7 mrg <li><a href="#powerpc-x-eabisim">powerpc-*-eabisim</a>
93 1.7 mrg <li><a href="#powerpc-x-eabi">powerpc-*-eabi</a>
94 1.7 mrg <li><a href="#powerpcle-x-elf">powerpcle-*-elf</a>
95 1.7 mrg <li><a href="#powerpcle-x-eabisim">powerpcle-*-eabisim</a>
96 1.7 mrg <li><a href="#powerpcle-x-eabi">powerpcle-*-eabi</a>
97 1.7 mrg <li><a href="#s390-x-linux">s390-*-linux*</a>
98 1.7 mrg <li><a href="#s390x-x-linux">s390x-*-linux*</a>
99 1.7 mrg <li><a href="#s390x-ibm-tpf">s390x-ibm-tpf*</a>
100 1.7 mrg <li><a href="#x-x-solaris2">*-*-solaris2*</a>
101 1.7 mrg <li><a href="#sparc-x-x">sparc*-*-*</a>
102 1.7 mrg <li><a href="#sparc-sun-solaris2">sparc-sun-solaris2*</a>
103 1.7 mrg <li><a href="#sparc-sun-solaris210">sparc-sun-solaris2.10</a>
104 1.7 mrg <li><a href="#sparc-x-linux">sparc-*-linux*</a>
105 1.7 mrg <li><a href="#sparc64-x-solaris2">sparc64-*-solaris2*</a>
106 1.7 mrg <li><a href="#sparcv9-x-solaris2">sparcv9-*-solaris2*</a>
107 1.7 mrg <li><a href="#c6x-x-x">c6x-*-*</a>
108 1.7 mrg <li><a href="#tilegx-x-linux">tilegx-*-linux*</a>
109 1.7 mrg <li><a href="#tilegxbe-x-linux">tilegxbe-*-linux*</a>
110 1.7 mrg <li><a href="#tilepro-x-linux">tilepro-*-linux*</a>
111 1.7 mrg <li><a href="#visium-x-elf">visium-*-elf</a>
112 1.7 mrg <li><a href="#x-x-vxworks">*-*-vxworks*</a>
113 1.7 mrg <li><a href="#x86-64-x-x">x86_64-*-*</a> amd64-*-*
114 1.7 mrg <li><a href="#x86-64-x-solaris210">x86_64-*-solaris2.1[0-9]*</a>
115 1.7 mrg <li><a href="#xtensa-x-elf">xtensa*-*-elf</a>
116 1.7 mrg <li><a href="#xtensa-x-linux">xtensa*-*-linux*</a>
117 1.7 mrg <li><a href="#windows">Microsoft Windows</a>
118 1.7 mrg <li><a href="#x-x-cygwin">*-*-cygwin</a>
119 1.7 mrg <li><a href="#x-x-interix">*-*-interix</a>
120 1.7 mrg <li><a href="#x-x-mingw32">*-*-mingw32</a>
121 1.7 mrg <li><a href="#os2">OS/2</a>
122 1.7 mrg <li><a href="#older">Older systems</a>
123 1.7 mrg </ul>
124 1.7 mrg
125 1.7 mrg <ul>
126 1.7 mrg <li><a href="#elf">all ELF targets</a> (SVR4, Solaris 2, etc.)
127 1.7 mrg </ul>
128 1.6 mrg
129 1.7 mrg <p><!-- -------- host/target specific issues start here ---------------- -->
130 1.7 mrg <hr /><a name="aarch64_002dx_002dx"></a>
131 1.6 mrg
132 1.7 mrg <h3 class="heading"><a name="TOC0"></a>aarch64*-*-*</h3>
133 1.6 mrg
134 1.7 mrg <p>Binutils pre 2.24 does not have support for selecting <samp><span class="option">-mabi</span></samp> and
135 1.7 mrg does not support ILP32. If it is used to build GCC 4.9 or later, GCC will
136 1.7 mrg not support option <samp><span class="option">-mabi=ilp32</span></samp>.
137 1.6 mrg
138 1.7 mrg <p>To enable a workaround for the Cortex-A53 erratum number 835769 by default
139 1.7 mrg (for all CPUs regardless of -mcpu option given) at configure time use the
140 1.7 mrg <samp><span class="option">--enable-fix-cortex-a53-835769</span></samp> option. This will enable the fix by
141 1.7 mrg default and can be explicitly disabled during compilation by passing the
142 1.7 mrg <samp><span class="option">-mno-fix-cortex-a53-835769</span></samp> option. Conversely,
143 1.7 mrg <samp><span class="option">--disable-fix-cortex-a53-835769</span></samp> will disable the workaround by
144 1.7 mrg default. The workaround is disabled by default if neither of
145 1.7 mrg <samp><span class="option">--enable-fix-cortex-a53-835769</span></samp> or
146 1.7 mrg <samp><span class="option">--disable-fix-cortex-a53-835769</span></samp> is given at configure time.
147 1.6 mrg
148 1.7 mrg <p>To enable a workaround for the Cortex-A53 erratum number 843419 by default
149 1.7 mrg (for all CPUs regardless of -mcpu option given) at configure time use the
150 1.7 mrg <samp><span class="option">--enable-fix-cortex-a53-843419</span></samp> option. This workaround is applied at
151 1.7 mrg link time. Enabling the workaround will cause GCC to pass the relevant option
152 1.7 mrg to the linker. It can be explicitly disabled during compilation by passing the
153 1.7 mrg <samp><span class="option">-mno-fix-cortex-a53-843419</span></samp> option. Conversely,
154 1.7 mrg <samp><span class="option">--disable-fix-cortex-a53-843419</span></samp> will disable the workaround by default.
155 1.7 mrg The workaround is disabled by default if neither of
156 1.7 mrg <samp><span class="option">--enable-fix-cortex-a53-843419</span></samp> or
157 1.7 mrg <samp><span class="option">--disable-fix-cortex-a53-843419</span></samp> is given at configure time.
158 1.6 mrg
159 1.7 mrg <p><hr /><a name="alpha_002dx_002dx"></a>
160 1.6 mrg
161 1.7 mrg <h3 class="heading"><a name="TOC1"></a>alpha*-*-*</h3>
162 1.6 mrg
163 1.7 mrg <p>This section contains general configuration information for all
164 1.7 mrg alpha-based platforms using ELF (in particular, ignore this section for
165 1.7 mrg DEC OSF/1, Digital UNIX and Tru64 UNIX). In addition to reading this
166 1.7 mrg section, please read all other sections that match your target.
167 1.6 mrg
168 1.7 mrg <p>We require binutils 2.11.2 or newer.
169 1.7 mrg Previous binutils releases had a number of problems with DWARF 2
170 1.7 mrg debugging information, not the least of which is incorrect linking of
171 1.7 mrg shared libraries.
172 1.6 mrg
173 1.7 mrg <p><hr /><a name="alpha_002ddec_002dosf51"></a>
174 1.6 mrg
175 1.7 mrg <h3 class="heading"><a name="TOC2"></a>alpha*-dec-osf5.1</h3>
176 1.6 mrg
177 1.7 mrg <p>Systems using processors that implement the DEC Alpha architecture and
178 1.7 mrg are running the DEC/Compaq/HP Unix (DEC OSF/1, Digital UNIX, or Compaq/HP
179 1.7 mrg Tru64 UNIX) operating system, for example the DEC Alpha AXP systems.
180 1.6 mrg
181 1.7 mrg <p>Support for Tru64 UNIX V5.1 has been removed in GCC 4.8. As of GCC 4.6,
182 1.7 mrg support for Tru64 UNIX V4.0 and V5.0 has been removed. As of GCC 3.2,
183 1.7 mrg versions before <code>alpha*-dec-osf4</code> are no longer supported. (These
184 1.7 mrg are the versions which identify themselves as DEC OSF/1.)
185 1.6 mrg
186 1.7 mrg <p><hr /><a name="amd64_002dx_002dsolaris210"></a>
187 1.6 mrg
188 1.7 mrg <h3 class="heading"><a name="TOC3"></a>amd64-*-solaris2.1[0-9]*</h3>
189 1.6 mrg
190 1.7 mrg <p>This is a synonym for ‘<samp><span class="samp">x86_64-*-solaris2.1[0-9]*</span></samp>’.
191 1.6 mrg
192 1.7 mrg <p><hr /><a name="arc_002dx_002delf32"></a>
193 1.6 mrg
194 1.7 mrg <h3 class="heading"><a name="TOC4"></a>arc-*-elf32</h3>
195 1.6 mrg
196 1.7 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>’
197 1.7 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>’,
198 1.7 mrg or ‘<samp><span class="samp">arc700</span></samp>’.
199 1.6 mrg
200 1.7 mrg <p><hr /><a name="arc_002dlinux_002duclibc"></a>
201 1.6 mrg
202 1.7 mrg <h3 class="heading"><a name="TOC5"></a>arc-linux-uclibc</h3>
203 1.1 mrg
204 1.7 mrg <p>Use ‘<samp><span class="samp">configure --target=arc-linux-uclibc --with-cpu=arc700 --enable-languages="c,c++"</span></samp>’ to configure GCC.
205 1.1 mrg
206 1.7 mrg <p><hr /><a name="arm_002dx_002deabi"></a>
207 1.1 mrg
208 1.7 mrg <h3 class="heading"><a name="TOC6"></a>arm-*-eabi</h3>
209 1.4 mrg
210 1.1 mrg <p>ARM-family processors. Subtargets that use the ELF object format
211 1.1 mrg require GNU binutils 2.13 or newer. Such subtargets include:
212 1.3 skrll <code>arm-*-netbsdelf</code>, <code>arm-*-*linux-*</code>
213 1.3 skrll and <code>arm-*-rtemseabi</code>.
214 1.7 mrg
215 1.7 mrg <p>Building the Ada frontend commonly fails (an infinite loop executing
216 1.7 mrg <code>xsinfo</code>) if the host compiler is GNAT 4.8. Host compilers built from the
217 1.7 mrg GNAT 4.6, 4.9 or 5 release branches are known to succeed.
218 1.7 mrg
219 1.7 mrg <p><hr /><a name="avr"></a>
220 1.7 mrg
221 1.7 mrg <h3 class="heading"><a name="TOC7"></a>avr</h3>
222 1.7 mrg
223 1.1 mrg <p>ATMEL AVR-family micro controllers. These are used in embedded
224 1.7 mrg applications. There are no standard Unix configurations.
225 1.1 mrg See “AVR Options” in the main manual
226 1.1 mrg for the list of supported MCU types.
227 1.7 mrg
228 1.7 mrg <p>Use ‘<samp><span class="samp">configure --target=avr --enable-languages="c"</span></samp>’ to configure GCC.
229 1.7 mrg
230 1.7 mrg <p>Further installation notes and other useful information about AVR tools
231 1.1 mrg can also be obtained from:
232 1.7 mrg
233 1.7 mrg <ul>
234 1.7 mrg <li><a href="http://www.nongnu.org/avr/">http://www.nongnu.org/avr/</a>
235 1.7 mrg <li><a href="http://www.amelek.gda.pl/avr/">http://www.amelek.gda.pl/avr/</a>
236 1.7 mrg </ul>
237 1.7 mrg
238 1.7 mrg <p>We <em>strongly</em> recommend using binutils 2.13 or newer.
239 1.7 mrg
240 1.7 mrg <p>The following error:
241 1.7 mrg <pre class="smallexample"> Error: register required
242 1.7 mrg </pre>
243 1.7 mrg <p>indicates that you should upgrade to a newer version of the binutils.
244 1.7 mrg
245 1.7 mrg <p><hr /><a name="bfin"></a>
246 1.7 mrg
247 1.7 mrg <h3 class="heading"><a name="TOC8"></a>Blackfin</h3>
248 1.7 mrg
249 1.7 mrg <p>The Blackfin processor, an Analog Devices DSP.
250 1.1 mrg See “Blackfin Options” in the main manual
251 1.7 mrg
252 1.7 mrg <p>More information, and a version of binutils with support for this processor,
253 1.1 mrg is available at <a href="http://blackfin.uclinux.org">http://blackfin.uclinux.org</a>
254 1.7 mrg
255 1.7 mrg <p><hr /><a name="cr16"></a>
256 1.7 mrg
257 1.7 mrg <h3 class="heading"><a name="TOC9"></a>CR16</h3>
258 1.7 mrg
259 1.5 mrg <p>The CR16 CompactRISC architecture is a 16-bit architecture. This
260 1.5 mrg architecture is used in embedded applications.
261 1.3 skrll
262 1.7 mrg <p>See “CR16 Options” in the main manual for a list of CR16-specific options.
263 1.7 mrg
264 1.7 mrg <p>Use ‘<samp><span class="samp">configure --target=cr16-elf --enable-languages=c,c++</span></samp>’ to configure
265 1.7 mrg GCC for building a CR16 elf cross-compiler.
266 1.7 mrg
267 1.7 mrg <p>Use ‘<samp><span class="samp">configure --target=cr16-uclinux --enable-languages=c,c++</span></samp>’ to
268 1.7 mrg configure GCC for building a CR16 uclinux cross-compiler.
269 1.7 mrg
270 1.7 mrg <p><hr /><a name="cris"></a>
271 1.7 mrg
272 1.7 mrg <h3 class="heading"><a name="TOC10"></a>CRIS</h3>
273 1.7 mrg
274 1.1 mrg <p>CRIS is the CPU architecture in Axis Communications ETRAX system-on-a-chip
275 1.1 mrg series. These are used in embedded applications.
276 1.7 mrg
277 1.7 mrg <p>See “CRIS Options” in the main manual
278 1.1 mrg for a list of CRIS-specific options.
279 1.7 mrg
280 1.7 mrg <p>There are a few different CRIS targets:
281 1.7 mrg <dl>
282 1.7 mrg <dt><code>cris-axis-elf</code><dd>Mainly for monolithic embedded systems. Includes a multilib for the
283 1.7 mrg ‘<samp><span class="samp">v10</span></samp>’ core used in ‘<samp><span class="samp">ETRAX 100 LX</span></samp>’.
284 1.7 mrg <br><dt><code>cris-axis-linux-gnu</code><dd>A GNU/Linux port for the CRIS architecture, currently targeting
285 1.7 mrg ‘<samp><span class="samp">ETRAX 100 LX</span></samp>’ by default.
286 1.1 mrg </dl>
287 1.1 mrg
288 1.7 mrg <p>For <code>cris-axis-elf</code> you need binutils 2.11
289 1.1 mrg or newer. For <code>cris-axis-linux-gnu</code> you need binutils 2.12 or newer.
290 1.7 mrg
291 1.7 mrg <p>Pre-packaged tools can be obtained from
292 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
293 1.1 mrg information about this platform is available at
294 1.1 mrg <a href="http://developer.axis.com/">http://developer.axis.com/</a>.
295 1.7 mrg
296 1.7 mrg <p><hr /><a name="dos"></a>
297 1.7 mrg
298 1.7 mrg <h3 class="heading"><a name="TOC11"></a>DOS</h3>
299 1.7 mrg
300 1.1 mrg <p>Please have a look at the <a href="binaries.html">binaries page</a>.
301 1.7 mrg
302 1.7 mrg <p>You cannot install GCC by itself on MSDOS; it will not compile under
303 1.1 mrg any MSDOS compiler except itself. You need to get the complete
304 1.1 mrg compilation package DJGPP, which includes binaries as well as sources,
305 1.1 mrg and includes all the necessary compilation tools and libraries.
306 1.7 mrg
307 1.7 mrg <p><hr /><a name="epiphany_002dx_002delf"></a>
308 1.7 mrg
309 1.7 mrg <h3 class="heading"><a name="TOC12"></a>epiphany-*-elf</h3>
310 1.7 mrg
311 1.7 mrg <p>Adapteva Epiphany.
312 1.3 skrll This configuration is intended for embedded systems.
313 1.7 mrg
314 1.7 mrg <p><hr /><a name="x_002dx_002dfreebsd"></a>
315 1.7 mrg
316 1.7 mrg <h3 class="heading"><a name="TOC13"></a>*-*-freebsd*</h3>
317 1.7 mrg
318 1.1 mrg <p>Support for FreeBSD 1 was discontinued in GCC 3.2. Support for
319 1.1 mrg FreeBSD 2 (and any mutant a.out variants of FreeBSD 3) was
320 1.1 mrg discontinued in GCC 4.0.
321 1.7 mrg
322 1.7 mrg <p>In order to better utilize FreeBSD base system functionality and match
323 1.3 skrll the configuration of the system compiler, GCC 4.5 and above as well as
324 1.3 skrll GCC 4.4 past 2010-06-20 leverage SSP support in libc (which is present
325 1.3 skrll on FreeBSD 7 or later) and the use of <code>__cxa_atexit</code> by default
326 1.3 skrll (on FreeBSD 6 or later). The use of <code>dl_iterate_phdr</code> inside
327 1.7 mrg <samp><span class="file">libgcc_s.so.1</span></samp> and boehm-gc (on FreeBSD 7 or later) is enabled
328 1.3 skrll by GCC 4.5 and above.
329 1.7 mrg
330 1.7 mrg <p>We support FreeBSD using the ELF file format with DWARF 2 debugging
331 1.7 mrg for all CPU architectures. You may use <samp><span class="option">-gstabs</span></samp> instead of
332 1.7 mrg <samp><span class="option">-g</span></samp>, if you really want the old debugging format. There are
333 1.1 mrg no known issues with mixing object files and libraries with different
334 1.1 mrg debugging formats. Otherwise, this release of GCC should now match
335 1.1 mrg more of the configuration used in the stock FreeBSD configuration of
336 1.7 mrg GCC. In particular, <samp><span class="option">--enable-threads</span></samp> is now configured by
337 1.1 mrg default. However, as a general user, do not attempt to replace the
338 1.1 mrg system compiler with this release. Known to bootstrap and check with
339 1.1 mrg good results on FreeBSD 7.2-STABLE. In the past, known to bootstrap
340 1.1 mrg and check with good results on FreeBSD 3.0, 3.4, 4.0, 4.2, 4.3, 4.4,
341 1.1 mrg 4.5, 4.8, 4.9 and 5-CURRENT.
342 1.7 mrg
343 1.7 mrg <p>The version of binutils installed in <samp><span class="file">/usr/bin</span></samp> probably works
344 1.1 mrg with this release of GCC. Bootstrapping against the latest GNU
345 1.7 mrg binutils and/or the version found in <samp><span class="file">/usr/ports/devel/binutils</span></samp> has
346 1.1 mrg been known to enable additional features and improve overall testsuite
347 1.1 mrg results. However, it is currently known that boehm-gc (which itself
348 1.1 mrg is required for java) may not configure properly on FreeBSD prior to
349 1.1 mrg the FreeBSD 7.0 release with GNU binutils after 2.16.1.
350 1.7 mrg
351 1.7 mrg <p><hr /><a name="ft32_002dx_002delf"></a>
352 1.7 mrg
353 1.7 mrg <h3 class="heading"><a name="TOC14"></a>ft32-*-elf</h3>
354 1.7 mrg
355 1.7 mrg <p>The FT32 processor.
356 1.7 mrg This configuration is intended for embedded systems.
357 1.7 mrg
358 1.7 mrg <p><hr /><a name="h8300_002dhms"></a>
359 1.7 mrg
360 1.7 mrg <h3 class="heading"><a name="TOC15"></a>h8300-hms</h3>
361 1.7 mrg
362 1.1 mrg <p>Renesas H8/300 series of processors.
363 1.7 mrg
364 1.7 mrg <p>Please have a look at the <a href="binaries.html">binaries page</a>.
365 1.7 mrg
366 1.7 mrg <p>The calling convention and structure layout has changed in release 2.6.
367 1.1 mrg All code must be recompiled. The calling convention now passes the
368 1.1 mrg first three arguments in function calls in registers. Structures are no
369 1.1 mrg longer a multiple of 2 bytes.
370 1.7 mrg
371 1.7 mrg <p><hr /><a name="hppa_002dhp_002dhpux"></a>
372 1.7 mrg
373 1.7 mrg <h3 class="heading"><a name="TOC16"></a>hppa*-hp-hpux*</h3>
374 1.7 mrg
375 1.1 mrg <p>Support for HP-UX version 9 and older was discontinued in GCC 3.4.
376 1.7 mrg
377 1.7 mrg <p>We require using gas/binutils on all hppa platforms. Version 2.19 or
378 1.1 mrg later is recommended.
379 1.7 mrg
380 1.7 mrg <p>It may be helpful to configure GCC with the
381 1.7 mrg <a href="./configure.html#with-gnu-as"><samp><span class="option">--with-gnu-as</span></samp></a> and
382 1.7 mrg <samp><span class="option">--with-as=...</span></samp> options to ensure that GCC can find GAS.
383 1.7 mrg
384 1.7 mrg <p>The HP assembler should not be used with GCC. It is rarely tested and may
385 1.7 mrg not work. It shouldn't be used with any languages other than C due to its
386 1.1 mrg many limitations.
387 1.7 mrg
388 1.7 mrg <p>Specifically, <samp><span class="option">-g</span></samp> does not work (HP-UX uses a peculiar debugging
389 1.1 mrg format which GCC does not know about). It also inserts timestamps
390 1.1 mrg into each object file it creates, causing the 3-stage comparison test to
391 1.1 mrg fail during a bootstrap. You should be able to continue by saying
392 1.7 mrg ‘<samp><span class="samp">make all-host all-target</span></samp>’ after getting the failure from ‘<samp><span class="samp">make</span></samp>’.
393 1.7 mrg
394 1.7 mrg <p>Various GCC features are not supported. For example, it does not support weak
395 1.1 mrg symbols or alias definitions. As a result, explicit template instantiations
396 1.1 mrg are required when using C++. This makes it difficult if not impossible to
397 1.1 mrg build many C++ applications.
398 1.7 mrg
399 1.7 mrg <p>There are two default scheduling models for instructions. These are
400 1.1 mrg PROCESSOR_7100LC and PROCESSOR_8000. They are selected from the pa-risc
401 1.7 mrg architecture specified for the target machine when configuring.
402 1.1 mrg PROCESSOR_8000 is the default. PROCESSOR_7100LC is selected when
403 1.7 mrg the target is a ‘<samp><span class="samp">hppa1*</span></samp>’ machine.
404 1.7 mrg
405 1.7 mrg <p>The PROCESSOR_8000 model is not well suited to older processors. Thus,
406 1.1 mrg it is important to completely specify the machine architecture when
407 1.1 mrg configuring if you want a model other than PROCESSOR_8000. The macro
408 1.1 mrg TARGET_SCHED_DEFAULT can be defined in BOOT_CFLAGS if a different
409 1.1 mrg default scheduling model is desired.
410 1.7 mrg
411 1.7 mrg <p>As of GCC 4.0, GCC uses the UNIX 95 namespace for HP-UX 10.10
412 1.7 mrg through 11.00, and the UNIX 98 namespace for HP-UX 11.11 and later.
413 1.1 mrg This namespace change might cause problems when bootstrapping with
414 1.1 mrg an earlier version of GCC or the HP compiler as essentially the same
415 1.1 mrg namespace is required for an entire build. This problem can be avoided
416 1.7 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>’
417 1.7 mrg or ‘<samp><span class="samp">98</span></samp>’. Another way is to add an appropriate set of predefines
418 1.7 mrg to <samp><span class="env">CC</span></samp>. The description for the <samp><span class="option">munix=</span></samp> option contains
419 1.1 mrg a list of the predefines used with each standard.
420 1.7 mrg
421 1.7 mrg <p>More specific information to ‘<samp><span class="samp">hppa*-hp-hpux*</span></samp>’ targets follows.
422 1.7 mrg
423 1.7 mrg <p><hr /><a name="hppa_002dhp_002dhpux10"></a>
424 1.7 mrg
425 1.7 mrg <h3 class="heading"><a name="TOC17"></a>hppa*-hp-hpux10</h3>
426 1.7 mrg
427 1.1 mrg <p>For hpux10.20, we <em>highly</em> recommend you pick up the latest sed patch
428 1.1 mrg <code>PHCO_19798</code> from HP.
429 1.7 mrg
430 1.7 mrg <p>The C++ ABI has changed incompatibly in GCC 4.0. COMDAT subspaces are
431 1.1 mrg used for one-only code and data. This resolves many of the previous
432 1.1 mrg problems in using C++ on this target. However, the ABI is not compatible
433 1.1 mrg with the one implemented under HP-UX 11 using secondary definitions.
434 1.7 mrg
435 1.7 mrg <p><hr /><a name="hppa_002dhp_002dhpux11"></a>
436 1.7 mrg
437 1.7 mrg <h3 class="heading"><a name="TOC18"></a>hppa*-hp-hpux11</h3>
438 1.7 mrg
439 1.1 mrg <p>GCC 3.0 and up support HP-UX 11. GCC 2.95.x is not supported and cannot
440 1.1 mrg be used to compile GCC 3.0 and up.
441 1.7 mrg
442 1.7 mrg <p>The libffi and libjava libraries haven't been ported to 64-bit HP-UX and don't build.
443 1.7 mrg
444 1.7 mrg <p>Refer to <a href="binaries.html">binaries</a> for information about obtaining
445 1.1 mrg precompiled GCC binaries for HP-UX. Precompiled binaries must be obtained
446 1.7 mrg to build the Ada language as it can't be bootstrapped using C. Ada is
447 1.1 mrg only available for the 32-bit PA-RISC runtime.
448 1.7 mrg
449 1.7 mrg <p>Starting with GCC 3.4 an ISO C compiler is required to bootstrap. The
450 1.7 mrg bundled compiler supports only traditional C; you will need either HP's
451 1.1 mrg unbundled compiler, or a binary distribution of GCC.
452 1.7 mrg
453 1.7 mrg <p>It is possible to build GCC 3.3 starting with the bundled HP compiler,
454 1.1 mrg but the process requires several steps. GCC 3.3 can then be used to
455 1.1 mrg build later versions. The fastjar program contains ISO C code and
456 1.7 mrg can't be built with the HP bundled compiler. This problem can be
457 1.1 mrg avoided by not building the Java language. For example, use the
458 1.7 mrg <samp><span class="option">--enable-languages="c,c++,f77,objc"</span></samp> option in your configure
459 1.1 mrg command.
460 1.7 mrg
461 1.7 mrg <p>There are several possible approaches to building the distribution.
462 1.1 mrg Binutils can be built first using the HP tools. Then, the GCC
463 1.1 mrg distribution can be built. The second approach is to build GCC
464 1.7 mrg first using the HP tools, then build binutils, then rebuild GCC.
465 1.1 mrg There have been problems with various binary distributions, so it
466 1.1 mrg is best not to start from a binary distribution.
467 1.7 mrg
468 1.7 mrg <p>On 64-bit capable systems, there are two distinct targets. Different
469 1.1 mrg installation prefixes must be used if both are to be installed on
470 1.7 mrg the same system. The ‘<samp><span class="samp">hppa[1-2]*-hp-hpux11*</span></samp>’ target generates code
471 1.7 mrg for the 32-bit PA-RISC runtime architecture and uses the HP linker.
472 1.7 mrg The ‘<samp><span class="samp">hppa64-hp-hpux11*</span></samp>’ target generates 64-bit code for the
473 1.1 mrg PA-RISC 2.0 architecture.
474 1.7 mrg
475 1.7 mrg <p>The script config.guess now selects the target type based on the compiler
476 1.7 mrg detected during configuration. You must define <samp><span class="env">PATH</span></samp> or <samp><span class="env">CC</span></samp> so
477 1.7 mrg that configure finds an appropriate compiler for the initial bootstrap.
478 1.7 mrg When <samp><span class="env">CC</span></samp> is used, the definition should contain the options that are
479 1.7 mrg needed whenever <samp><span class="env">CC</span></samp> is used.
480 1.7 mrg
481 1.7 mrg <p>Specifically, options that determine the runtime architecture must be
482 1.7 mrg in <samp><span class="env">CC</span></samp> to correctly select the target for the build. It is also
483 1.7 mrg convenient to place many other compiler options in <samp><span class="env">CC</span></samp>. For example,
484 1.7 mrg <samp><span class="env">CC="cc -Ac +DA2.0W -Wp,-H16376 -D_CLASSIC_TYPES -D_HPUX_SOURCE"</span></samp>
485 1.1 mrg can be used to bootstrap the GCC 3.3 branch with the HP compiler in
486 1.7 mrg 64-bit K&R/bundled mode. The <samp><span class="option">+DA2.0W</span></samp> option will result in
487 1.7 mrg the automatic selection of the ‘<samp><span class="samp">hppa64-hp-hpux11*</span></samp>’ target. The
488 1.1 mrg macro definition table of cpp needs to be increased for a successful
489 1.1 mrg build with the HP compiler. _CLASSIC_TYPES and _HPUX_SOURCE need to
490 1.1 mrg be defined when building with the bundled compiler, or when using the
491 1.7 mrg <samp><span class="option">-Ac</span></samp> option. These defines aren't necessary with <samp><span class="option">-Ae</span></samp>.
492 1.7 mrg
493 1.7 mrg <p>It is best to explicitly configure the ‘<samp><span class="samp">hppa64-hp-hpux11*</span></samp>’ target
494 1.7 mrg with the <samp><span class="option">--with-ld=...</span></samp> option. This overrides the standard
495 1.1 mrg search for ld. The two linkers supported on this target require different
496 1.1 mrg commands. The default linker is determined during configuration. As a
497 1.7 mrg result, it's not possible to switch linkers in the middle of a GCC build.
498 1.1 mrg This has been reported to sometimes occur in unified builds of binutils
499 1.1 mrg and GCC.
500 1.7 mrg
501 1.7 mrg <p>A recent linker patch must be installed for the correct operation of
502 1.1 mrg GCC 3.3 and later. <code>PHSS_26559</code> and <code>PHSS_24304</code> are the
503 1.1 mrg oldest linker patches that are known to work. They are for HP-UX
504 1.1 mrg 11.00 and 11.11, respectively. <code>PHSS_24303</code>, the companion to
505 1.7 mrg <code>PHSS_24304</code>, might be usable but it hasn't been tested. These
506 1.1 mrg patches have been superseded. Consult the HP patch database to obtain
507 1.1 mrg the currently recommended linker patch for your system.
508 1.7 mrg
509 1.7 mrg <p>The patches are necessary for the support of weak symbols on the
510 1.1 mrg 32-bit port, and for the running of initializers and finalizers. Weak
511 1.1 mrg symbols are implemented using SOM secondary definition symbols. Prior
512 1.7 mrg to HP-UX 11, there are bugs in the linker support for secondary symbols.
513 1.1 mrg The patches correct a problem of linker core dumps creating shared
514 1.1 mrg libraries containing secondary symbols, as well as various other
515 1.1 mrg linking issues involving secondary symbols.
516 1.7 mrg
517 1.7 mrg <p>GCC 3.3 uses the ELF DT_INIT_ARRAY and DT_FINI_ARRAY capabilities to
518 1.1 mrg run initializers and finalizers on the 64-bit port. The 32-bit port
519 1.7 mrg uses the linker <samp><span class="option">+init</span></samp> and <samp><span class="option">+fini</span></samp> options for the same
520 1.1 mrg purpose. The patches correct various problems with the +init/+fini
521 1.1 mrg options, including program core dumps. Binutils 2.14 corrects a
522 1.7 mrg problem on the 64-bit port resulting from HP's non-standard use of
523 1.1 mrg the .init and .fini sections for array initializers and finalizers.
524 1.7 mrg
525 1.7 mrg <p>Although the HP and GNU linkers are both supported for the
526 1.7 mrg ‘<samp><span class="samp">hppa64-hp-hpux11*</span></samp>’ target, it is strongly recommended that the
527 1.1 mrg HP linker be used for link editing on this target.
528 1.7 mrg
529 1.7 mrg <p>At this time, the GNU linker does not support the creation of long
530 1.7 mrg branch stubs. As a result, it can't successfully link binaries
531 1.1 mrg containing branch offsets larger than 8 megabytes. In addition,
532 1.1 mrg there are problems linking shared libraries, linking executables
533 1.7 mrg with <samp><span class="option">-static</span></samp>, and with dwarf2 unwind and exception support.
534 1.7 mrg It also doesn't provide stubs for internal calls to global functions
535 1.7 mrg in shared libraries, so these calls can't be overloaded.
536 1.7 mrg
537 1.7 mrg <p>The HP dynamic loader does not support GNU symbol versioning, so symbol
538 1.1 mrg versioning is not supported. It may be necessary to disable symbol
539 1.7 mrg versioning with <samp><span class="option">--disable-symvers</span></samp> when using GNU ld.
540 1.7 mrg
541 1.7 mrg <p>POSIX threads are the default. The optional DCE thread library is not
542 1.7 mrg supported, so <samp><span class="option">--enable-threads=dce</span></samp> does not work.
543 1.7 mrg
544 1.7 mrg <p><hr /><a name="x_002dx_002dlinux_002dgnu"></a>
545 1.7 mrg
546 1.7 mrg <h3 class="heading"><a name="TOC19"></a>*-*-linux-gnu</h3>
547 1.7 mrg
548 1.1 mrg <p>Versions of libstdc++-v3 starting with 3.2.1 require bug fixes present
549 1.1 mrg in glibc 2.2.5 and later. More information is available in the
550 1.1 mrg libstdc++-v3 documentation.
551 1.7 mrg
552 1.7 mrg <p><hr /><a name="ix86_002dx_002dlinux"></a>
553 1.7 mrg
554 1.7 mrg <h3 class="heading"><a name="TOC20"></a>i?86-*-linux*</h3>
555 1.7 mrg
556 1.7 mrg <p>As of GCC 3.3, binutils 2.13.1 or later is required for this platform.
557 1.1 mrg See <a href="http://gcc.gnu.org/PR10877">bug 10877</a> for more information.
558 1.7 mrg
559 1.7 mrg <p>If you receive Signal 11 errors when building on GNU/Linux, then it is
560 1.1 mrg possible you have a hardware problem. Further information on this can be
561 1.1 mrg found on <a href="http://www.bitwizard.nl/sig11/">www.bitwizard.nl</a>.
562 1.7 mrg
563 1.7 mrg <p><hr /><a name="ix86_002dx_002dsolaris210"></a>
564 1.7 mrg
565 1.7 mrg <h3 class="heading"><a name="TOC21"></a>i?86-*-solaris2.10</h3>
566 1.7 mrg
567 1.3 skrll <p>Use this for Solaris 10 or later on x86 and x86-64 systems. Starting
568 1.7 mrg with GCC 4.7, there is also a 64-bit ‘<samp><span class="samp">amd64-*-solaris2.1[0-9]*</span></samp>’ or
569 1.7 mrg ‘<samp><span class="samp">x86_64-*-solaris2.1[0-9]*</span></samp>’ configuration that corresponds to
570 1.7 mrg ‘<samp><span class="samp">sparcv9-sun-solaris2*</span></samp>’.
571 1.7 mrg
572 1.7 mrg <p>It is recommended that you configure GCC to use the GNU assembler. The
573 1.7 mrg versions included in Solaris 10, from GNU binutils 2.15 (in
574 1.7 mrg <samp><span class="file">/usr/sfw/bin/gas</span></samp>), and Solaris 11, from GNU binutils 2.19 or
575 1.7 mrg newer (also available as <samp><span class="file">/usr/bin/gas</span></samp> and
576 1.7 mrg <samp><span class="file">/usr/gnu/bin/as</span></samp>), work fine. Please note that the current
577 1.7 mrg version, from GNU binutils 2.26, only works on Solaris 12 when using the
578 1.7 mrg Solaris linker. On Solaris 10 and 11, you either have to wait for GNU
579 1.7 mrg binutils 2.26.1 or newer, or stay with GNU binutils 2.25.1. Recent
580 1.7 mrg versions of the Solaris assembler in <samp><span class="file">/usr/ccs/bin/as</span></samp> work almost
581 1.7 mrg as well, though.
582 1.7 mrg <!-- FIXME: as patch requirements? -->
583 1.7 mrg
584 1.7 mrg <p>For linking, the Solaris linker, is preferred. If you want to use the GNU
585 1.7 mrg linker instead, note that due to a packaging bug the version in Solaris
586 1.7 mrg 10, from GNU binutils 2.15 (in <samp><span class="file">/usr/sfw/bin/gld</span></samp>), cannot be used,
587 1.7 mrg while the version in Solaris 11, from GNU binutils 2.19 or newer (also
588 1.7 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
589 1.7 mrg latest version, from GNU binutils 2.26.
590 1.7 mrg
591 1.7 mrg <p>To use GNU <samp><span class="command">as</span></samp>, configure with the options
592 1.7 mrg <samp><span class="option">--with-gnu-as --with-as=/usr/sfw/bin/gas</span></samp>. It may be necessary
593 1.7 mrg to configure with <samp><span class="option">--without-gnu-ld --with-ld=/usr/ccs/bin/ld</span></samp> to
594 1.7 mrg guarantee use of Sun <samp><span class="command">ld</span></samp>.
595 1.7 mrg <!-- FIXME: why -without-gnu-ld -with-ld? -->
596 1.7 mrg
597 1.7 mrg <p><hr /><a name="ia64_002dx_002dlinux"></a>
598 1.7 mrg
599 1.7 mrg <h3 class="heading"><a name="TOC22"></a>ia64-*-linux</h3>
600 1.7 mrg
601 1.1 mrg <p>IA-64 processor (also known as IPF, or Itanium Processor Family)
602 1.1 mrg running GNU/Linux.
603 1.7 mrg
604 1.7 mrg <p>If you are using the installed system libunwind library with
605 1.7 mrg <samp><span class="option">--with-system-libunwind</span></samp>, then you must use libunwind 0.98 or
606 1.1 mrg later.
607 1.7 mrg
608 1.7 mrg <p>None of the following versions of GCC has an ABI that is compatible
609 1.1 mrg with any of the other versions in this list, with the exception that
610 1.1 mrg Red Hat 2.96 and Trillian 000171 are compatible with each other:
611 1.7 mrg 3.1, 3.0.2, 3.0.1, 3.0, Red Hat 2.96, and Trillian 000717.
612 1.7 mrg This primarily affects C++ programs and programs that create shared libraries.
613 1.7 mrg GCC 3.1 or later is recommended for compiling linux, the kernel.
614 1.1 mrg As of version 3.1 GCC is believed to be fully ABI compliant, and hence no
615 1.1 mrg more major ABI changes are expected.
616 1.7 mrg
617 1.7 mrg <p><hr /><a name="ia64_002dx_002dhpux"></a>
618 1.7 mrg
619 1.7 mrg <h3 class="heading"><a name="TOC23"></a>ia64-*-hpux*</h3>
620 1.7 mrg
621 1.1 mrg <p>Building GCC on this target requires the GNU Assembler. The bundled HP
622 1.1 mrg assembler will not work. To prevent GCC from using the wrong assembler,
623 1.7 mrg the option <samp><span class="option">--with-gnu-as</span></samp> may be necessary.
624 1.7 mrg
625 1.7 mrg <p>The GCC libunwind library has not been ported to HPUX. This means that for
626 1.7 mrg GCC versions 3.2.3 and earlier, <samp><span class="option">--enable-libunwind-exceptions</span></samp>
627 1.7 mrg is required to build GCC. For GCC 3.3 and later, this is the default.
628 1.7 mrg For gcc 3.4.3 and later, <samp><span class="option">--enable-libunwind-exceptions</span></samp> is
629 1.1 mrg removed and the system libunwind library will always be used.
630 1.7 mrg
631 1.7 mrg <p><hr />
632 1.7 mrg <!-- rs6000-ibm-aix*, powerpc-ibm-aix* --><a name="x_002dibm_002daix"></a>
633 1.7 mrg
634 1.7 mrg <h3 class="heading"><a name="TOC24"></a>*-ibm-aix*</h3>
635 1.7 mrg
636 1.7 mrg <p>Support for AIX version 3 and older was discontinued in GCC 3.4.
637 1.1 mrg Support for AIX version 4.2 and older was discontinued in GCC 4.5.
638 1.7 mrg
639 1.7 mrg <p>“out of memory” bootstrap failures may indicate a problem with
640 1.1 mrg process resource limits (ulimit). Hard limits are configured in the
641 1.7 mrg <samp><span class="file">/etc/security/limits</span></samp> system configuration file.
642 1.7 mrg
643 1.7 mrg <p>GCC 4.9 and above require a C++ compiler for bootstrap. IBM VAC++ / xlC
644 1.7 mrg cannot bootstrap GCC. xlc can bootstrap an older version of GCC and
645 1.7 mrg G++ can bootstrap recent releases of GCC.
646 1.7 mrg
647 1.7 mrg <p>GCC can bootstrap with recent versions of IBM XLC, but bootstrapping
648 1.1 mrg with an earlier release of GCC is recommended. Bootstrapping with XLC
649 1.1 mrg requires a larger data segment, which can be enabled through the
650 1.1 mrg <var>LDR_CNTRL</var> environment variable, e.g.,
651 1.1 mrg
652 1.7 mrg <pre class="smallexample"> % LDR_CNTRL=MAXDATA=0x50000000
653 1.7 mrg % export LDR_CNTRL
654 1.7 mrg </pre>
655 1.7 mrg <p>One can start with a pre-compiled version of GCC to build from
656 1.7 mrg sources. One may delete GCC's “fixed” header files when starting
657 1.1 mrg with a version of GCC built for an earlier release of AIX.
658 1.1 mrg
659 1.7 mrg <p>To speed up the configuration phases of bootstrapping and installing GCC,
660 1.7 mrg one may use GNU Bash instead of AIX <samp><span class="command">/bin/sh</span></samp>, e.g.,
661 1.7 mrg
662 1.7 mrg <pre class="smallexample"> % CONFIG_SHELL=/opt/freeware/bin/bash
663 1.7 mrg % export CONFIG_SHELL
664 1.7 mrg </pre>
665 1.7 mrg <p>and then proceed as described in <a href="build.html">the build instructions</a>, where we strongly recommend specifying an absolute path
666 1.1 mrg to invoke <var>srcdir</var>/configure.
667 1.7 mrg
668 1.7 mrg <p>Because GCC on AIX is built as a 32-bit executable by default,
669 1.1 mrg (although it can generate 64-bit programs) the GMP and MPFR libraries
670 1.1 mrg required by gfortran must be 32-bit libraries. Building GMP and MPFR
671 1.1 mrg as static archive libraries works better than shared libraries.
672 1.7 mrg
673 1.7 mrg <p>Errors involving <code>alloca</code> when building GCC generally are due
674 1.1 mrg to an incorrect definition of <code>CC</code> in the Makefile or mixing files
675 1.1 mrg compiled with the native C compiler and GCC. During the stage1 phase of
676 1.7 mrg the build, the native AIX compiler <strong>must</strong> be invoked as <samp><span class="command">cc</span></samp>
677 1.7 mrg (not <samp><span class="command">xlc</span></samp>). Once <samp><span class="command">configure</span></samp> has been informed of
678 1.7 mrg <samp><span class="command">xlc</span></samp>, one needs to use ‘<samp><span class="samp">make distclean</span></samp>’ to remove the
679 1.7 mrg configure cache files and ensure that <samp><span class="env">CC</span></samp> environment variable
680 1.7 mrg does not provide a definition that will confuse <samp><span class="command">configure</span></samp>.
681 1.1 mrg If this error occurs during stage2 or later, then the problem most likely
682 1.1 mrg is the version of Make (see above).
683 1.7 mrg
684 1.7 mrg <p>The native <samp><span class="command">as</span></samp> and <samp><span class="command">ld</span></samp> are recommended for
685 1.3 skrll bootstrapping on AIX. The GNU Assembler, GNU Linker, and GNU
686 1.3 skrll Binutils version 2.20 is the minimum level that supports bootstrap on
687 1.7 mrg AIX 5. The GNU Assembler has not been updated to support AIX 6 or
688 1.3 skrll AIX 7. The native AIX tools do interoperate with GCC.
689 1.7 mrg
690 1.7 mrg <p>AIX 7.1 added partial support for DWARF debugging, but full support
691 1.7 mrg requires AIX 7.1 TL03 SP7 that supports additional DWARF sections and
692 1.7 mrg fixes a bug in the assembler. AIX 7.1 TL03 SP5 distributed a version
693 1.7 mrg of libm.a missing important symbols; a fix for IV77796 will be
694 1.7 mrg included in SP6.
695 1.7 mrg
696 1.7 mrg <p>AIX 5.3 TL10, AIX 6.1 TL05 and AIX 7.1 TL00 introduced an AIX
697 1.3 skrll assembler change that sometimes produces corrupt assembly files
698 1.3 skrll causing AIX linker errors. The bug breaks GCC bootstrap on AIX and
699 1.3 skrll can cause compilation failures with existing GCC installations. An
700 1.3 skrll AIX iFix for AIX 5.3 is available (APAR IZ98385 for AIX 5.3 TL10, APAR
701 1.3 skrll IZ98477 for AIX 5.3 TL11 and IZ98134 for AIX 5.3 TL12). AIX 5.3 TL11 SP8,
702 1.3 skrll AIX 5.3 TL12 SP5, AIX 6.1 TL04 SP11, AIX 6.1 TL05 SP7, AIX 6.1 TL06 SP6,
703 1.3 skrll AIX 6.1 TL07 and AIX 7.1 TL01 should include the fix.
704 1.7 mrg
705 1.7 mrg <p>Building <samp><span class="file">libstdc++.a</span></samp> requires a fix for an AIX Assembler bug
706 1.1 mrg APAR IY26685 (AIX 4.3) or APAR IY25528 (AIX 5.1). It also requires a
707 1.1 mrg fix for another AIX Assembler bug and a co-dependent AIX Archiver fix
708 1.1 mrg referenced as APAR IY53606 (AIX 5.2) or as APAR IY54774 (AIX 5.1)
709 1.7 mrg
710 1.7 mrg <p><a name="TransferAixShobj"></a>‘<samp><span class="samp">libstdc++</span></samp>’ in GCC 3.4 increments the major version number of the
711 1.7 mrg shared object and GCC installation places the <samp><span class="file">libstdc++.a</span></samp>
712 1.1 mrg shared library in a common location which will overwrite the and GCC
713 1.1 mrg 3.3 version of the shared library. Applications either need to be
714 1.1 mrg re-linked against the new shared library or the GCC 3.1 and GCC 3.3
715 1.7 mrg versions of the ‘<samp><span class="samp">libstdc++</span></samp>’ shared object needs to be available
716 1.7 mrg to the AIX runtime loader. The GCC 3.1 ‘<samp><span class="samp">libstdc++.so.4</span></samp>’, if
717 1.7 mrg present, and GCC 3.3 ‘<samp><span class="samp">libstdc++.so.5</span></samp>’ shared objects can be
718 1.1 mrg installed for runtime dynamic loading using the following steps to set
719 1.7 mrg the ‘<samp><span class="samp">F_LOADONLY</span></samp>’ flag in the shared object for <em>each</em>
720 1.7 mrg multilib <samp><span class="file">libstdc++.a</span></samp> installed:
721 1.1 mrg
722 1.7 mrg <p>Extract the shared objects from the currently installed
723 1.7 mrg <samp><span class="file">libstdc++.a</span></samp> archive:
724 1.7 mrg <pre class="smallexample"> % ar -x libstdc++.a libstdc++.so.4 libstdc++.so.5
725 1.7 mrg </pre>
726 1.7 mrg <p>Enable the ‘<samp><span class="samp">F_LOADONLY</span></samp>’ flag so that the shared object will be
727 1.1 mrg available for runtime dynamic loading, but not linking:
728 1.7 mrg <pre class="smallexample"> % strip -e libstdc++.so.4 libstdc++.so.5
729 1.7 mrg </pre>
730 1.7 mrg <p>Archive the runtime-only shared object in the GCC 3.4
731 1.7 mrg <samp><span class="file">libstdc++.a</span></samp> archive:
732 1.7 mrg <pre class="smallexample"> % ar -q libstdc++.a libstdc++.so.4 libstdc++.so.5
733 1.7 mrg </pre>
734 1.7 mrg <p>Eventually, the
735 1.7 mrg <a href="./configure.html#WithAixSoname"><samp><span class="option">--with-aix-soname=svr4</span></samp></a>
736 1.5 mrg configure option may drop the need for this procedure for libraries that
737 1.5 mrg support it.
738 1.7 mrg
739 1.7 mrg <p>Linking executables and shared libraries may produce warnings of
740 1.1 mrg duplicate symbols. The assembly files generated by GCC for AIX always
741 1.1 mrg have included multiple symbol definitions for certain global variable
742 1.1 mrg and function declarations in the original program. The warnings should
743 1.1 mrg not prevent the linker from producing a correct library or runnable
744 1.1 mrg executable.
745 1.7 mrg
746 1.7 mrg <p>AIX 4.3 utilizes a “large format” archive to support both 32-bit and
747 1.1 mrg 64-bit object modules. The routines provided in AIX 4.3.0 and AIX 4.3.1
748 1.7 mrg to parse archive libraries did not handle the new format correctly.
749 1.1 mrg These routines are used by GCC and result in error messages during
750 1.1 mrg linking such as “not a COFF file”. The version of the routines shipped
751 1.7 mrg with AIX 4.3.1 should work for a 32-bit environment. The <samp><span class="option">-g</span></samp>
752 1.1 mrg option of the archive command may be used to create archives of 32-bit
753 1.1 mrg objects using the original “small format”. A correct version of the
754 1.1 mrg routines is shipped with AIX 4.3.2 and above.
755 1.7 mrg
756 1.7 mrg <p>Some versions of the AIX binder (linker) can fail with a relocation
757 1.7 mrg overflow severe error when the <samp><span class="option">-bbigtoc</span></samp> option is used to link
758 1.1 mrg GCC-produced object files into an executable that overflows the TOC. A fix
759 1.1 mrg for APAR IX75823 (OVERFLOW DURING LINK WHEN USING GCC AND -BBIGTOC) is
760 1.1 mrg available from IBM Customer Support and from its
761 1.1 mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
762 1.1 mrg website as PTF U455193.
763 1.7 mrg
764 1.7 mrg <p>The AIX 4.3.2.1 linker (bos.rte.bind_cmds Level 4.3.2.1) will dump core
765 1.1 mrg with a segmentation fault when invoked by any version of GCC. A fix for
766 1.1 mrg APAR IX87327 is available from IBM Customer Support and from its
767 1.1 mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
768 1.1 mrg website as PTF U461879. This fix is incorporated in AIX 4.3.3 and above.
769 1.7 mrg
770 1.7 mrg <p>The initial assembler shipped with AIX 4.3.0 generates incorrect object
771 1.1 mrg files. A fix for APAR IX74254 (64BIT DISASSEMBLED OUTPUT FROM COMPILER FAILS
772 1.1 mrg TO ASSEMBLE/BIND) is available from IBM Customer Support and from its
773 1.1 mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
774 1.1 mrg website as PTF U453956. This fix is incorporated in AIX 4.3.1 and above.
775 1.7 mrg
776 1.7 mrg <p>AIX provides National Language Support (NLS). Compilers and assemblers
777 1.1 mrg use NLS to support locale-specific representations of various data
778 1.7 mrg formats including floating-point numbers (e.g., ‘<samp><span class="samp">.</span></samp>’ vs ‘<samp><span class="samp">,</span></samp>’ for
779 1.1 mrg separating decimal fractions). There have been problems reported where
780 1.1 mrg GCC does not produce the same floating-point formats that the assembler
781 1.7 mrg expects. If one encounters this problem, set the <samp><span class="env">LANG</span></samp>
782 1.7 mrg environment variable to ‘<samp><span class="samp">C</span></samp>’ or ‘<samp><span class="samp">En_US</span></samp>’.
783 1.7 mrg
784 1.7 mrg <p>A default can be specified with the <samp><span class="option">-mcpu=</span><var>cpu_type</var></samp>
785 1.7 mrg switch and using the configure option <samp><span class="option">--with-cpu-</span><var>cpu_type</var></samp>.
786 1.7 mrg
787 1.7 mrg <p><hr /><a name="iq2000_002dx_002delf"></a>
788 1.7 mrg
789 1.7 mrg <h3 class="heading"><a name="TOC25"></a>iq2000-*-elf</h3>
790 1.7 mrg
791 1.1 mrg <p>Vitesse IQ2000 processors. These are used in embedded
792 1.1 mrg applications. There are no standard Unix configurations.
793 1.7 mrg
794 1.7 mrg <p><hr /><a name="lm32_002dx_002delf"></a>
795 1.7 mrg
796 1.7 mrg <h3 class="heading"><a name="TOC26"></a>lm32-*-elf</h3>
797 1.7 mrg
798 1.7 mrg <p>Lattice Mico32 processor.
799 1.1 mrg This configuration is intended for embedded systems.
800 1.7 mrg
801 1.7 mrg <p><hr /><a name="lm32_002dx_002duclinux"></a>
802 1.7 mrg
803 1.7 mrg <h3 class="heading"><a name="TOC27"></a>lm32-*-uclinux</h3>
804 1.7 mrg
805 1.7 mrg <p>Lattice Mico32 processor.
806 1.1 mrg This configuration is intended for embedded systems running uClinux.
807 1.7 mrg
808 1.7 mrg <p><hr /><a name="m32c_002dx_002delf"></a>
809 1.7 mrg
810 1.7 mrg <h3 class="heading"><a name="TOC28"></a>m32c-*-elf</h3>
811 1.7 mrg
812 1.7 mrg <p>Renesas M32C processor.
813 1.1 mrg This configuration is intended for embedded systems.
814 1.7 mrg
815 1.7 mrg <p><hr /><a name="m32r_002dx_002delf"></a>
816 1.7 mrg
817 1.7 mrg <h3 class="heading"><a name="TOC29"></a>m32r-*-elf</h3>
818 1.7 mrg
819 1.7 mrg <p>Renesas M32R processor.
820 1.1 mrg This configuration is intended for embedded systems.
821 1.7 mrg
822 1.7 mrg <p><hr /><a name="m68k_002dx_002dx"></a>
823 1.7 mrg
824 1.7 mrg <h3 class="heading"><a name="TOC30"></a>m68k-*-*</h3>
825 1.7 mrg
826 1.1 mrg <p>By default,
827 1.7 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
828 1.7 mrg ‘<samp><span class="samp">m68k-*-linux</span></samp>’
829 1.1 mrg build libraries for both M680x0 and ColdFire processors. If you only
830 1.1 mrg need the M680x0 libraries, you can omit the ColdFire ones by passing
831 1.7 mrg <samp><span class="option">--with-arch=m68k</span></samp> to <samp><span class="command">configure</span></samp>. Alternatively, you
832 1.7 mrg can omit the M680x0 libraries by passing <samp><span class="option">--with-arch=cf</span></samp> to
833 1.7 mrg <samp><span class="command">configure</span></samp>. These targets default to 5206 or 5475 code as
834 1.1 mrg appropriate for the target system when
835 1.7 mrg configured with <samp><span class="option">--with-arch=cf</span></samp> and 68020 code otherwise.
836 1.7 mrg
837 1.7 mrg <p>The ‘<samp><span class="samp">m68k-*-netbsd</span></samp>’ and
838 1.7 mrg ‘<samp><span class="samp">m68k-*-openbsd</span></samp>’ targets also support the <samp><span class="option">--with-arch</span></samp>
839 1.1 mrg option. They will generate ColdFire CFV4e code when configured with
840 1.7 mrg <samp><span class="option">--with-arch=cf</span></samp> and 68020 code otherwise.
841 1.7 mrg
842 1.7 mrg <p>You can override the default processors listed above by configuring
843 1.7 mrg with <samp><span class="option">--with-cpu=</span><var>target</var></samp>. This <var>target</var> can either
844 1.7 mrg be a <samp><span class="option">-mcpu</span></samp> argument or one of the following values:
845 1.7 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>’,
846 1.7 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>’.
847 1.7 mrg
848 1.7 mrg <p>GCC requires at least binutils version 2.17 on these targets.
849 1.7 mrg
850 1.7 mrg <p><hr /><a name="m68k_002dx_002duclinux"></a>
851 1.7 mrg
852 1.7 mrg <h3 class="heading"><a name="TOC31"></a>m68k-*-uclinux</h3>
853 1.7 mrg
854 1.1 mrg <p>GCC 4.3 changed the uClinux configuration so that it uses the
855 1.7 mrg ‘<samp><span class="samp">m68k-linux-gnu</span></samp>’ ABI rather than the ‘<samp><span class="samp">m68k-elf</span></samp>’ ABI.
856 1.1 mrg It also added improved support for C++ and flat shared libraries,
857 1.3 skrll both of which were ABI changes.
858 1.7 mrg
859 1.7 mrg <p><hr /><a name="mep_002dx_002delf"></a>
860 1.7 mrg
861 1.7 mrg <h3 class="heading"><a name="TOC32"></a>mep-*-elf</h3>
862 1.7 mrg
863 1.7 mrg <p>Toshiba Media embedded Processor.
864 1.1 mrg This configuration is intended for embedded systems.
865 1.7 mrg
866 1.7 mrg <p><hr /><a name="microblaze_002dx_002delf"></a>
867 1.7 mrg
868 1.7 mrg <h3 class="heading"><a name="TOC33"></a>microblaze-*-elf</h3>
869 1.7 mrg
870 1.7 mrg <p>Xilinx MicroBlaze processor.
871 1.3 skrll This configuration is intended for embedded systems.
872 1.7 mrg
873 1.7 mrg <p><hr /><a name="mips_002dx_002dx"></a>
874 1.7 mrg
875 1.7 mrg <h3 class="heading"><a name="TOC34"></a>mips-*-*</h3>
876 1.7 mrg
877 1.1 mrg <p>If on a MIPS system you get an error message saying “does not have gp
878 1.7 mrg sections for all it's [sic] sectons [sic]”, don't worry about it. This
879 1.1 mrg happens whenever you use GAS with the MIPS linker, but there is not
880 1.1 mrg really anything wrong, and it is okay to use the output file. You can
881 1.1 mrg stop such warnings by installing the GNU linker.
882 1.7 mrg
883 1.7 mrg <p>It would be nice to extend GAS to produce the gp tables, but they are
884 1.1 mrg optional, and there should not be a warning about their absence.
885 1.7 mrg
886 1.7 mrg <p>The libstdc++ atomic locking routines for MIPS targets requires MIPS II
887 1.1 mrg and later. A patch went in just after the GCC 3.3 release to
888 1.7 mrg make ‘<samp><span class="samp">mips*-*-*</span></samp>’ use the generic implementation instead. You can also
889 1.7 mrg configure for ‘<samp><span class="samp">mipsel-elf</span></samp>’ as a workaround. The
890 1.7 mrg ‘<samp><span class="samp">mips*-*-linux*</span></samp>’ target continues to use the MIPS II routines. More
891 1.1 mrg work on this is expected in future releases.
892 1.1 mrg
893 1.7 mrg <!-- If you make -with-llsc the default for another target, please also -->
894 1.7 mrg <!-- update the description of the -with-llsc option. -->
895 1.7 mrg <p>The built-in <code>__sync_*</code> functions are available on MIPS II and
896 1.7 mrg later systems and others that support the ‘<samp><span class="samp">ll</span></samp>’, ‘<samp><span class="samp">sc</span></samp>’ and
897 1.7 mrg ‘<samp><span class="samp">sync</span></samp>’ instructions. This can be overridden by passing
898 1.7 mrg <samp><span class="option">--with-llsc</span></samp> or <samp><span class="option">--without-llsc</span></samp> when configuring GCC.
899 1.1 mrg Since the Linux kernel emulates these instructions if they are
900 1.7 mrg missing, the default for ‘<samp><span class="samp">mips*-*-linux*</span></samp>’ targets is
901 1.7 mrg <samp><span class="option">--with-llsc</span></samp>. The <samp><span class="option">--with-llsc</span></samp> and
902 1.7 mrg <samp><span class="option">--without-llsc</span></samp> configure options may be overridden at compile
903 1.7 mrg time by passing the <samp><span class="option">-mllsc</span></samp> or <samp><span class="option">-mno-llsc</span></samp> options to
904 1.1 mrg the compiler.
905 1.7 mrg
906 1.7 mrg <p>MIPS systems check for division by zero (unless
907 1.7 mrg <samp><span class="option">-mno-check-zero-division</span></samp> is passed to the compiler) by
908 1.1 mrg generating either a conditional trap or a break instruction. Using
909 1.1 mrg trap results in smaller code, but is only supported on MIPS II and
910 1.1 mrg later. Also, some versions of the Linux kernel have a bug that
911 1.1 mrg prevents trap from generating the proper signal (<code>SIGFPE</code>). To enable
912 1.7 mrg the use of break, use the <samp><span class="option">--with-divide=breaks</span></samp>
913 1.7 mrg <samp><span class="command">configure</span></samp> option when configuring GCC. The default is to
914 1.1 mrg use traps on systems that support them.
915 1.7 mrg
916 1.7 mrg <p>The assembler from GNU binutils 2.17 and earlier has a bug in the way
917 1.1 mrg it sorts relocations for REL targets (o32, o64, EABI). This can cause
918 1.1 mrg bad code to be generated for simple C++ programs. Also the linker
919 1.1 mrg from GNU binutils versions prior to 2.17 has a bug which causes the
920 1.7 mrg runtime linker stubs in very large programs, like <samp><span class="file">libgcj.so</span></samp>, to
921 1.1 mrg be incorrectly generated. GNU Binutils 2.18 and later (and snapshots
922 1.1 mrg made after Nov. 9, 2006) should be free from both of these problems.
923 1.7 mrg
924 1.7 mrg <p><hr /><a name="mips_002dsgi_002dirix5"></a>
925 1.7 mrg
926 1.7 mrg <h3 class="heading"><a name="TOC35"></a>mips-sgi-irix5</h3>
927 1.7 mrg
928 1.3 skrll <p>Support for IRIX 5 has been removed in GCC 4.6.
929 1.7 mrg
930 1.7 mrg <p><hr /><a name="mips_002dsgi_002dirix6"></a>
931 1.7 mrg
932 1.7 mrg <h3 class="heading"><a name="TOC36"></a>mips-sgi-irix6</h3>
933 1.7 mrg
934 1.3 skrll <p>Support for IRIX 6.5 has been removed in GCC 4.8. Support for IRIX 6
935 1.3 skrll releases before 6.5 has been removed in GCC 4.6, as well as support for
936 1.3 skrll the O32 ABI.
937 1.7 mrg
938 1.7 mrg <p><hr /><a name="moxie_002dx_002delf"></a>
939 1.7 mrg
940 1.7 mrg <h3 class="heading"><a name="TOC37"></a>moxie-*-elf</h3>
941 1.7 mrg
942 1.3 skrll <p>The moxie processor.
943 1.7 mrg
944 1.7 mrg <p><hr /><a name="msp430_002dx_002delf"></a>
945 1.7 mrg
946 1.7 mrg <h3 class="heading"><a name="TOC38"></a>msp430-*-elf</h3>
947 1.7 mrg
948 1.7 mrg <p>TI MSP430 processor.
949 1.5 mrg This configuration is intended for embedded systems.
950 1.7 mrg
951 1.7 mrg <p><hr /><a name="nds32le_002dx_002delf"></a>
952 1.7 mrg
953 1.7 mrg <h3 class="heading"><a name="TOC39"></a>nds32le-*-elf</h3>
954 1.7 mrg
955 1.5 mrg <p>Andes NDS32 target in little endian mode.
956 1.7 mrg
957 1.7 mrg <p><hr /><a name="nds32be_002dx_002delf"></a>
958 1.7 mrg
959 1.7 mrg <h3 class="heading"><a name="TOC40"></a>nds32be-*-elf</h3>
960 1.7 mrg
961 1.5 mrg <p>Andes NDS32 target in big endian mode.
962 1.7 mrg
963 1.7 mrg <p><hr /><a name="nvptx_002dx_002dnone"></a>
964 1.7 mrg
965 1.7 mrg <h3 class="heading"><a name="TOC41"></a>nvptx-*-none</h3>
966 1.7 mrg
967 1.5 mrg <p>Nvidia PTX target.
968 1.7 mrg
969 1.7 mrg <p>Instead of GNU binutils, you will need to install
970 1.7 mrg <a href="https://github.com/MentorEmbedded/nvptx-tools/">nvptx-tools</a>.
971 1.5 mrg Tell GCC where to find it:
972 1.7 mrg <samp><span class="option">--with-build-time-tools=[install-nvptx-tools]/nvptx-none/bin</span></samp>.
973 1.7 mrg
974 1.7 mrg <p>A nvptx port of newlib is available at
975 1.7 mrg <a href="https://github.com/MentorEmbedded/nvptx-newlib/">nvptx-newlib</a>.
976 1.5 mrg It can be automatically built together with GCC. For this, add a
977 1.7 mrg symbolic link to nvptx-newlib's <samp><span class="file">newlib</span></samp> directory to the
978 1.5 mrg directory containing the GCC sources.
979 1.7 mrg
980 1.7 mrg <p>Use the <samp><span class="option">--disable-sjlj-exceptions</span></samp> and
981 1.7 mrg <samp><span class="option">--enable-newlib-io-long-long</span></samp> options when configuring.
982 1.7 mrg
983 1.7 mrg <p><hr /><a name="powerpc_002dx_002dx"></a>
984 1.7 mrg
985 1.7 mrg <h3 class="heading"><a name="TOC42"></a>powerpc-*-*</h3>
986 1.7 mrg
987 1.7 mrg <p>You can specify a default version for the <samp><span class="option">-mcpu=</span><var>cpu_type</var></samp>
988 1.7 mrg switch by using the configure option <samp><span class="option">--with-cpu-</span><var>cpu_type</var></samp>.
989 1.7 mrg
990 1.7 mrg <p>You will need
991 1.1 mrg <a href="ftp://ftp.kernel.org/pub/linux/devel/binutils">binutils 2.15</a>
992 1.1 mrg or newer for a working GCC.
993 1.7 mrg
994 1.7 mrg <p><hr /><a name="powerpc_002dx_002ddarwin"></a>
995 1.7 mrg
996 1.7 mrg <h3 class="heading"><a name="TOC43"></a>powerpc-*-darwin*</h3>
997 1.7 mrg
998 1.1 mrg <p>PowerPC running Darwin (Mac OS X kernel).
999 1.7 mrg
1000 1.7 mrg <p>Pre-installed versions of Mac OS X may not include any developer tools,
1001 1.1 mrg meaning that you will not be able to build GCC from source. Tool
1002 1.1 mrg binaries are available at
1003 1.3 skrll <a href="http://opensource.apple.com/">http://opensource.apple.com/</a>.
1004 1.7 mrg
1005 1.7 mrg <p>This version of GCC requires at least cctools-590.36. The
1006 1.1 mrg cctools-590.36 package referenced from
1007 1.1 mrg <a href="http://gcc.gnu.org/ml/gcc/2006-03/msg00507.html">http://gcc.gnu.org/ml/gcc/2006-03/msg00507.html</a> will not work
1008 1.1 mrg on systems older than 10.3.9 (aka darwin7.9.0).
1009 1.7 mrg
1010 1.7 mrg <p><hr /><a name="powerpc_002dx_002delf"></a>
1011 1.7 mrg
1012 1.7 mrg <h3 class="heading"><a name="TOC44"></a>powerpc-*-elf</h3>
1013 1.7 mrg
1014 1.1 mrg <p>PowerPC system in big endian mode, running System V.4.
1015 1.7 mrg
1016 1.7 mrg <p><hr /><a name="powerpc_002dx_002dlinux_002dgnu"></a>
1017 1.7 mrg
1018 1.7 mrg <h3 class="heading"><a name="TOC45"></a>powerpc*-*-linux-gnu*</h3>
1019 1.7 mrg
1020 1.1 mrg <p>PowerPC system in big endian mode running Linux.
1021 1.7 mrg
1022 1.7 mrg <p><hr /><a name="powerpc_002dx_002dnetbsd"></a>
1023 1.7 mrg
1024 1.7 mrg <h3 class="heading"><a name="TOC46"></a>powerpc-*-netbsd*</h3>
1025 1.7 mrg
1026 1.1 mrg <p>PowerPC system in big endian mode running NetBSD.
1027 1.7 mrg
1028 1.7 mrg <p><hr /><a name="powerpc_002dx_002deabisim"></a>
1029 1.7 mrg
1030 1.7 mrg <h3 class="heading"><a name="TOC47"></a>powerpc-*-eabisim</h3>
1031 1.7 mrg
1032 1.1 mrg <p>Embedded PowerPC system in big endian mode for use in running under the
1033 1.1 mrg PSIM simulator.
1034 1.7 mrg
1035 1.7 mrg <p><hr /><a name="powerpc_002dx_002deabi"></a>
1036 1.7 mrg
1037 1.7 mrg <h3 class="heading"><a name="TOC48"></a>powerpc-*-eabi</h3>
1038 1.7 mrg
1039 1.1 mrg <p>Embedded PowerPC system in big endian mode.
1040 1.7 mrg
1041 1.7 mrg <p><hr /><a name="powerpcle_002dx_002delf"></a>
1042 1.7 mrg
1043 1.7 mrg <h3 class="heading"><a name="TOC49"></a>powerpcle-*-elf</h3>
1044 1.7 mrg
1045 1.1 mrg <p>PowerPC system in little endian mode, running System V.4.
1046 1.7 mrg
1047 1.7 mrg <p><hr /><a name="powerpcle_002dx_002deabisim"></a>
1048 1.7 mrg
1049 1.7 mrg <h3 class="heading"><a name="TOC50"></a>powerpcle-*-eabisim</h3>
1050 1.7 mrg
1051 1.1 mrg <p>Embedded PowerPC system in little endian mode for use in running under
1052 1.1 mrg the PSIM simulator.
1053 1.7 mrg
1054 1.7 mrg <p><hr /><a name="powerpcle_002dx_002deabi"></a>
1055 1.7 mrg
1056 1.7 mrg <h3 class="heading"><a name="TOC51"></a>powerpcle-*-eabi</h3>
1057 1.7 mrg
1058 1.1 mrg <p>Embedded PowerPC system in little endian mode.
1059 1.7 mrg
1060 1.7 mrg <p><hr /><a name="rl78_002dx_002delf"></a>
1061 1.7 mrg
1062 1.7 mrg <h3 class="heading"><a name="TOC52"></a>rl78-*-elf</h3>
1063 1.7 mrg
1064 1.7 mrg <p>The Renesas RL78 processor.
1065 1.3 skrll This configuration is intended for embedded systems.
1066 1.7 mrg
1067 1.7 mrg <p><hr /><a name="rx_002dx_002delf"></a>
1068 1.7 mrg
1069 1.7 mrg <h3 class="heading"><a name="TOC53"></a>rx-*-elf</h3>
1070 1.7 mrg
1071 1.1 mrg <p>The Renesas RX processor. See
1072 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>
1073 1.1 mrg for more information about this processor.
1074 1.7 mrg
1075 1.7 mrg <p><hr /><a name="s390_002dx_002dlinux"></a>
1076 1.7 mrg
1077 1.7 mrg <h3 class="heading"><a name="TOC54"></a>s390-*-linux*</h3>
1078 1.7 mrg
1079 1.1 mrg <p>S/390 system running GNU/Linux for S/390.
1080 1.7 mrg
1081 1.7 mrg <p><hr /><a name="s390x_002dx_002dlinux"></a>
1082 1.7 mrg
1083 1.7 mrg <h3 class="heading"><a name="TOC55"></a>s390x-*-linux*</h3>
1084 1.7 mrg
1085 1.1 mrg <p>zSeries system (64-bit) running GNU/Linux for zSeries.
1086 1.7 mrg
1087 1.7 mrg <p><hr /><a name="s390x_002dibm_002dtpf"></a>
1088 1.7 mrg
1089 1.7 mrg <h3 class="heading"><a name="TOC56"></a>s390x-ibm-tpf*</h3>
1090 1.7 mrg
1091 1.1 mrg <p>zSeries system (64-bit) running TPF. This platform is
1092 1.1 mrg supported as cross-compilation target only.
1093 1.7 mrg
1094 1.7 mrg <p><hr /><!-- Please use Solaris 2 to refer to all release of Solaris, starting -->
1095 1.7 mrg <!-- with 2.0 until 2.6, 7, 8, etc. Solaris 1 was a marketing name for -->
1096 1.7 mrg <!-- SunOS 4 releases which we don't use to avoid confusion. Solaris -->
1097 1.7 mrg <!-- alone is too unspecific and must be avoided. -->
1098 1.7 mrg <a name="x_002dx_002dsolaris2"></a>
1099 1.7 mrg
1100 1.7 mrg <h3 class="heading"><a name="TOC57"></a>*-*-solaris2*</h3>
1101 1.7 mrg
1102 1.6 mrg <p>Support for Solaris 9 has been removed in GCC 5. Support for Solaris
1103 1.5 mrg 8 has been removed in GCC 4.8. Support for Solaris 7 has been removed
1104 1.5 mrg in GCC 4.6.
1105 1.7 mrg
1106 1.7 mrg <p>Sun does not ship a C compiler with Solaris 2 before Solaris 10, though
1107 1.3 skrll you can download the Sun Studio compilers for free. In Solaris 10 and
1108 1.7 mrg 11, GCC 3.4.3 is available as <samp><span class="command">/usr/sfw/bin/gcc</span></samp>. Solaris 11
1109 1.7 mrg also provides GCC 4.5.2, 4.7.3, and 4.8.2 as
1110 1.7 mrg <samp><span class="command">/usr/gcc/4.5/bin/gcc</span></samp> or similar. Alternatively,
1111 1.1 mrg you can install a pre-built GCC to bootstrap and install GCC. See the
1112 1.1 mrg <a href="binaries.html">binaries page</a> for details.
1113 1.7 mrg
1114 1.7 mrg <p>The Solaris 2 <samp><span class="command">/bin/sh</span></samp> will often fail to configure
1115 1.7 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
1116 1.1 mrg recommend using the following initial sequence of commands
1117 1.1 mrg
1118 1.7 mrg <pre class="smallexample"> % CONFIG_SHELL=/bin/ksh
1119 1.7 mrg % export CONFIG_SHELL
1120 1.7 mrg </pre>
1121 1.7 mrg <p class="noindent">and proceed as described in <a href="configure.html">the configure instructions</a>.
1122 1.1 mrg In addition we strongly recommend specifying an absolute path to invoke
1123 1.7 mrg <samp><var>srcdir</var><span class="command">/configure</span></samp>.
1124 1.7 mrg
1125 1.7 mrg <p>Solaris 10 comes with a number of optional OS packages. Some of these
1126 1.1 mrg are needed to use GCC fully, namely <code>SUNWarc</code>,
1127 1.1 mrg <code>SUNWbtool</code>, <code>SUNWesu</code>, <code>SUNWhea</code>, <code>SUNWlibm</code>,
1128 1.1 mrg <code>SUNWsprot</code>, and <code>SUNWtoo</code>. If you did not install all
1129 1.7 mrg optional packages when installing Solaris 10, you will need to verify that
1130 1.7 mrg the packages that GCC needs are installed.
1131 1.7 mrg To check whether an optional package is installed, use
1132 1.7 mrg the <samp><span class="command">pkginfo</span></samp> command. To add an optional package, use the
1133 1.7 mrg <samp><span class="command">pkgadd</span></samp> command. For further details, see the Solaris 10
1134 1.1 mrg documentation.
1135 1.7 mrg
1136 1.7 mrg <p>Starting with Solaris 11, the package management has changed, so you
1137 1.7 mrg need to check for <code>system/header</code>, <code>system/linker</code>, and
1138 1.7 mrg <code>developer/assembler</code> packages. Checking for and installing
1139 1.7 mrg packages is done with the <samp><span class="command">pkg</span></samp> command now.
1140 1.7 mrg
1141 1.7 mrg <p>Trying to use the linker and other tools in
1142 1.7 mrg <samp><span class="file">/usr/ucb</span></samp> to install GCC has been observed to cause trouble.
1143 1.1 mrg For example, the linker may hang indefinitely. The fix is to remove
1144 1.7 mrg <samp><span class="file">/usr/ucb</span></samp> from your <samp><span class="env">PATH</span></samp>.
1145 1.7 mrg
1146 1.7 mrg <p>The build process works more smoothly with the legacy Sun tools so, if you
1147 1.7 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
1148 1.7 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.
1149 1.7 mrg
1150 1.7 mrg <p>We recommend the use of the Solaris assembler or the GNU assembler, in
1151 1.7 mrg conjunction with the Solaris linker. The GNU <samp><span class="command">as</span></samp>
1152 1.7 mrg versions included in Solaris 10, from GNU binutils 2.15 (in
1153 1.7 mrg <samp><span class="file">/usr/sfw/bin/gas</span></samp>), and Solaris 11,
1154 1.7 mrg from GNU binutils 2.19 or newer (also in <samp><span class="file">/usr/bin/gas</span></samp> and
1155 1.7 mrg <samp><span class="file">/usr/gnu/bin/as</span></samp>), are known to work.
1156 1.7 mrg Current versions of GNU binutils (2.26)
1157 1.7 mrg are known to work as well, with the caveat mentioned in
1158 1.7 mrg <a href="#ix86-x-solaris210">i?86-*-solaris2.10</a> . Note that your mileage may vary
1159 1.7 mrg if you use a combination of the GNU tools and the Solaris tools: while the
1160 1.7 mrg combination GNU <samp><span class="command">as</span></samp> + Sun <samp><span class="command">ld</span></samp> should reasonably work,
1161 1.7 mrg the reverse combination Sun <samp><span class="command">as</span></samp> + GNU <samp><span class="command">ld</span></samp> may fail to
1162 1.7 mrg build or cause memory corruption at runtime in some cases for C++ programs.
1163 1.7 mrg <!-- FIXME: still? -->
1164 1.7 mrg GNU <samp><span class="command">ld</span></samp> usually works as well, although the version included in
1165 1.1 mrg Solaris 10 cannot be used due to several bugs. Again, the current
1166 1.7 mrg version (2.26) is known to work, but generally lacks platform specific
1167 1.7 mrg features, so better stay with Solaris <samp><span class="command">ld</span></samp>. To use the LTO linker
1168 1.7 mrg plugin (<samp><span class="option">-fuse-linker-plugin</span></samp>) with GNU <samp><span class="command">ld</span></samp>, GNU
1169 1.7 mrg binutils <em>must</em> be configured with <samp><span class="option">--enable-largefile</span></samp>.
1170 1.7 mrg
1171 1.7 mrg <p>To enable symbol versioning in ‘<samp><span class="samp">libstdc++</span></samp>’ with the Solaris linker,
1172 1.7 mrg you need to have any version of GNU <samp><span class="command">c++filt</span></samp>, which is part of
1173 1.7 mrg GNU binutils. ‘<samp><span class="samp">libstdc++</span></samp>’ symbol versioning will be disabled if no
1174 1.7 mrg appropriate version is found. Solaris <samp><span class="command">c++filt</span></samp> from the Solaris
1175 1.7 mrg Studio compilers does <em>not</em> work.
1176 1.7 mrg
1177 1.7 mrg <p>GNU <samp><span class="command">make</span></samp> version 3.81 or later is required to build libjava
1178 1.7 mrg with the Solaris linker.
1179 1.7 mrg
1180 1.7 mrg <p>Sun bug 4927647 sometimes causes random spurious testsuite failures
1181 1.7 mrg related to missing diagnostic output. This bug doesn't affect GCC
1182 1.7 mrg itself, rather it is a kernel bug triggered by the <samp><span class="command">expect</span></samp>
1183 1.1 mrg program which is used only by the GCC testsuite driver. When the bug
1184 1.7 mrg causes the <samp><span class="command">expect</span></samp> program to miss anticipated output, extra
1185 1.1 mrg testsuite failures appear.
1186 1.7 mrg
1187 1.7 mrg <p><hr /><a name="sparc_002dx_002dx"></a>
1188 1.7 mrg
1189 1.7 mrg <h3 class="heading"><a name="TOC58"></a>sparc*-*-*</h3>
1190 1.7 mrg
1191 1.3 skrll <p>This section contains general configuration information for all
1192 1.3 skrll SPARC-based platforms. In addition to reading this section, please
1193 1.3 skrll read all other sections that match your target.
1194 1.7 mrg
1195 1.7 mrg <p>Newer versions of the GNU Multiple Precision Library (GMP), the MPFR
1196 1.3 skrll library and the MPC library are known to be miscompiled by earlier
1197 1.3 skrll versions of GCC on these platforms. We therefore recommend the use
1198 1.3 skrll of the exact versions of these libraries listed as minimal versions
1199 1.3 skrll in <a href="prerequisites.html">the prerequisites</a>.
1200 1.7 mrg
1201 1.7 mrg <p><hr /><a name="sparc_002dsun_002dsolaris2"></a>
1202 1.7 mrg
1203 1.7 mrg <h3 class="heading"><a name="TOC59"></a>sparc-sun-solaris2*</h3>
1204 1.7 mrg
1205 1.1 mrg <p>When GCC is configured to use GNU binutils 2.14 or later, the binaries
1206 1.7 mrg produced are smaller than the ones produced using Sun's native tools;
1207 1.1 mrg this difference is quite significant for binaries containing debugging
1208 1.1 mrg information.
1209 1.7 mrg
1210 1.7 mrg <p>Starting with Solaris 7, the operating system is capable of executing
1211 1.1 mrg 64-bit SPARC V9 binaries. GCC 3.1 and later properly supports
1212 1.7 mrg this; the <samp><span class="option">-m64</span></samp> option enables 64-bit code generation.
1213 1.1 mrg However, if all you want is code tuned for the UltraSPARC CPU, you
1214 1.7 mrg should try the <samp><span class="option">-mtune=ultrasparc</span></samp> option instead, which produces
1215 1.1 mrg code that, unlike full 64-bit code, can still run on non-UltraSPARC
1216 1.1 mrg machines.
1217 1.7 mrg
1218 1.7 mrg <p>When configuring the GNU Multiple Precision Library (GMP), the MPFR
1219 1.3 skrll library or the MPC library on a Solaris 7 or later system, the canonical
1220 1.7 mrg target triplet must be specified as the <samp><span class="command">build</span></samp> parameter on the
1221 1.7 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
1222 1.3 skrll not that of GMP or MPFR or MPC). For example on a Solaris 9 system:
1223 1.7 mrg
1224 1.7 mrg <pre class="smallexample"> % ./configure --build=sparc-sun-solaris2.9 --prefix=xxx
1225 1.7 mrg </pre>
1226 1.7 mrg <p><hr /><a name="sparc_002dsun_002dsolaris210"></a>
1227 1.7 mrg
1228 1.7 mrg <h3 class="heading"><a name="TOC60"></a>sparc-sun-solaris2.10</h3>
1229 1.7 mrg
1230 1.1 mrg <p>There is a bug in older versions of the Sun assembler which breaks
1231 1.1 mrg thread-local storage (TLS). A typical error message is
1232 1.7 mrg
1233 1.7 mrg <pre class="smallexample"> ld: fatal: relocation error: R_SPARC_TLS_LE_HIX22: file /var/tmp//ccamPA1v.o:
1234 1.7 mrg symbol <unknown>: bad symbol type SECT: symbol type must be TLS
1235 1.7 mrg </pre>
1236 1.7 mrg <p class="noindent">This bug is fixed in Sun patch 118683-03 or later.
1237 1.7 mrg
1238 1.7 mrg <p><hr /><a name="sparc_002dx_002dlinux"></a>
1239 1.7 mrg
1240 1.7 mrg <h3 class="heading"><a name="TOC61"></a>sparc-*-linux*</h3>
1241 1.1 mrg
1242 1.1 mrg <p>GCC versions 3.0 and higher require binutils 2.11.2 and glibc 2.2.4
1243 1.1 mrg or newer on this platform. All earlier binutils and glibc
1244 1.1 mrg releases mishandled unaligned relocations on <code>sparc-*-*</code> targets.
1245 1.1 mrg
1246 1.7 mrg <p><hr /><a name="sparc64_002dx_002dsolaris2"></a>
1247 1.7 mrg
1248 1.7 mrg <h3 class="heading"><a name="TOC62"></a>sparc64-*-solaris2*</h3>
1249 1.7 mrg
1250 1.3 skrll <p>When configuring the GNU Multiple Precision Library (GMP), the MPFR
1251 1.3 skrll library or the MPC library, the canonical target triplet must be specified
1252 1.7 mrg as the <samp><span class="command">build</span></samp> parameter on the configure line. For example
1253 1.3 skrll on a Solaris 9 system:
1254 1.7 mrg
1255 1.7 mrg <pre class="smallexample"> % ./configure --build=sparc64-sun-solaris2.9 --prefix=xxx
1256 1.7 mrg </pre>
1257 1.7 mrg <p><hr /><a name="sparcv9_002dx_002dsolaris2"></a>
1258 1.7 mrg
1259 1.7 mrg <h3 class="heading"><a name="TOC63"></a>sparcv9-*-solaris2*</h3>
1260 1.7 mrg
1261 1.7 mrg <p>This is a synonym for ‘<samp><span class="samp">sparc64-*-solaris2*</span></samp>’.
1262 1.7 mrg
1263 1.7 mrg <p><hr /><a name="c6x_002dx_002dx"></a>
1264 1.7 mrg
1265 1.7 mrg <h3 class="heading"><a name="TOC64"></a>c6x-*-*</h3>
1266 1.7 mrg
1267 1.3 skrll <p>The C6X family of processors. This port requires binutils-2.22 or newer.
1268 1.7 mrg
1269 1.7 mrg <p><hr /><a name="tilegx_002d_002a_002dlinux"></a>
1270 1.7 mrg
1271 1.7 mrg <h3 class="heading"><a name="TOC65"></a>tilegx-*-linux*</h3>
1272 1.7 mrg
1273 1.5 mrg <p>The TILE-Gx processor in little endian mode, running GNU/Linux. This
1274 1.5 mrg port requires binutils-2.22 or newer.
1275 1.7 mrg
1276 1.7 mrg <p><hr /><a name="tilegxbe_002d_002a_002dlinux"></a>
1277 1.7 mrg
1278 1.7 mrg <h3 class="heading"><a name="TOC66"></a>tilegxbe-*-linux*</h3>
1279 1.7 mrg
1280 1.5 mrg <p>The TILE-Gx processor in big endian mode, running GNU/Linux. This
1281 1.5 mrg port requires binutils-2.23 or newer.
1282 1.7 mrg
1283 1.7 mrg <p><hr /><a name="tilepro_002d_002a_002dlinux"></a>
1284 1.7 mrg
1285 1.7 mrg <h3 class="heading"><a name="TOC67"></a>tilepro-*-linux*</h3>
1286 1.7 mrg
1287 1.3 skrll <p>The TILEPro processor running GNU/Linux. This port requires
1288 1.3 skrll binutils-2.22 or newer.
1289 1.7 mrg
1290 1.7 mrg <p><hr /><a name="visium_002dx_002delf"></a>
1291 1.7 mrg
1292 1.7 mrg <h3 class="heading"><a name="TOC68"></a>visium-*-elf</h3>
1293 1.7 mrg
1294 1.7 mrg <p>CDS VISIUMcore processor.
1295 1.5 mrg This configuration is intended for embedded systems.
1296 1.7 mrg
1297 1.7 mrg <p><hr /><a name="x_002dx_002dvxworks"></a>
1298 1.7 mrg
1299 1.7 mrg <h3 class="heading"><a name="TOC69"></a>*-*-vxworks*</h3>
1300 1.7 mrg
1301 1.1 mrg <p>Support for VxWorks is in flux. At present GCC supports <em>only</em> the
1302 1.7 mrg very recent VxWorks 5.5 (aka Tornado 2.2) release, and only on PowerPC.
1303 1.7 mrg We welcome patches for other architectures supported by VxWorks 5.5.
1304 1.1 mrg Support for VxWorks AE would also be welcome; we believe this is merely
1305 1.1 mrg a matter of writing an appropriate “configlette” (see below). We are
1306 1.1 mrg not interested in supporting older, a.out or COFF-based, versions of
1307 1.1 mrg VxWorks in GCC 3.
1308 1.7 mrg
1309 1.7 mrg <p>VxWorks comes with an older version of GCC installed in
1310 1.7 mrg <samp><var>$WIND_BASE</var><span class="file">/host</span></samp>; we recommend you do not overwrite it.
1311 1.7 mrg Choose an installation <var>prefix</var> entirely outside <var>$WIND_BASE</var>.
1312 1.7 mrg Before running <samp><span class="command">configure</span></samp>, create the directories <samp><var>prefix</var></samp>
1313 1.7 mrg and <samp><var>prefix</var><span class="file">/bin</span></samp>. Link or copy the appropriate assembler,
1314 1.7 mrg linker, etc. into <samp><var>prefix</var><span class="file">/bin</span></samp>, and set your <var>PATH</var> to
1315 1.7 mrg include that directory while running both <samp><span class="command">configure</span></samp> and
1316 1.7 mrg <samp><span class="command">make</span></samp>.
1317 1.7 mrg
1318 1.7 mrg <p>You must give <samp><span class="command">configure</span></samp> the
1319 1.7 mrg <samp><span class="option">--with-headers=</span><var>$WIND_BASE</var><span class="option">/target/h</span></samp> switch so that it can
1320 1.1 mrg find the VxWorks system headers. Since VxWorks is a cross compilation
1321 1.7 mrg target only, you must also specify <samp><span class="option">--target=</span><var>target</var></samp>.
1322 1.7 mrg <samp><span class="command">configure</span></samp> will attempt to create the directory
1323 1.7 mrg <samp><var>prefix</var><span class="file">/</span><var>target</var><span class="file">/sys-include</span></samp> and copy files into it;
1324 1.7 mrg make sure the user running <samp><span class="command">configure</span></samp> has sufficient privilege
1325 1.1 mrg to do so.
1326 1.7 mrg
1327 1.7 mrg <p>GCC's exception handling runtime requires a special “configlette”
1328 1.7 mrg module, <samp><span class="file">contrib/gthr_supp_vxw_5x.c</span></samp>. Follow the instructions in
1329 1.1 mrg that file to add the module to your kernel build. (Future versions of
1330 1.1 mrg VxWorks will incorporate this module.)
1331 1.7 mrg
1332 1.7 mrg <p><hr /><a name="x86_002d64_002dx_002dx"></a>
1333 1.7 mrg
1334 1.7 mrg <h3 class="heading"><a name="TOC70"></a>x86_64-*-*, amd64-*-*</h3>
1335 1.7 mrg
1336 1.1 mrg <p>GCC supports the x86-64 architecture implemented by the AMD64 processor
1337 1.7 mrg (amd64-*-* is an alias for x86_64-*-*) on GNU/Linux, FreeBSD and NetBSD.
1338 1.1 mrg On GNU/Linux the default is a bi-arch compiler which is able to generate
1339 1.7 mrg both 64-bit x86-64 and 32-bit x86 code (via the <samp><span class="option">-m32</span></samp> switch).
1340 1.7 mrg
1341 1.7 mrg <p><hr /><a name="x86_002d64_002dx_002dsolaris210"></a>
1342 1.7 mrg
1343 1.7 mrg <h3 class="heading"><a name="TOC71"></a>x86_64-*-solaris2.1[0-9]*</h3>
1344 1.7 mrg
1345 1.3 skrll <p>GCC also supports the x86-64 architecture implemented by the AMD64
1346 1.7 mrg processor (‘<samp><span class="samp">amd64-*-*</span></samp>’ is an alias for ‘<samp><span class="samp">x86_64-*-*</span></samp>’) on
1347 1.3 skrll Solaris 10 or later. Unlike other systems, without special options a
1348 1.3 skrll bi-arch compiler is built which generates 32-bit code by default, but
1349 1.7 mrg can generate 64-bit x86-64 code with the <samp><span class="option">-m64</span></samp> switch. Since
1350 1.7 mrg GCC 4.7, there is also a configuration that defaults to 64-bit code, but
1351 1.7 mrg can generate 32-bit code with <samp><span class="option">-m32</span></samp>. To configure and build
1352 1.7 mrg this way, you have to provide all support libraries like <samp><span class="file">libgmp</span></samp>
1353 1.7 mrg as 64-bit code, configure with <samp><span class="option">--target=x86_64-pc-solaris2.1x</span></samp>
1354 1.7 mrg and ‘<samp><span class="samp">CC=gcc -m64</span></samp>’.
1355 1.7 mrg
1356 1.7 mrg <p><hr /><a name="xtensa_002dx_002delf"></a>
1357 1.7 mrg
1358 1.7 mrg <h3 class="heading"><a name="TOC72"></a>xtensa*-*-elf</h3>
1359 1.7 mrg
1360 1.1 mrg <p>This target is intended for embedded Xtensa systems using the
1361 1.7 mrg ‘<samp><span class="samp">newlib</span></samp>’ C library. It uses ELF but does not support shared
1362 1.1 mrg objects. Designed-defined instructions specified via the
1363 1.1 mrg Tensilica Instruction Extension (TIE) language are only supported
1364 1.1 mrg through inline assembly.
1365 1.7 mrg
1366 1.7 mrg <p>The Xtensa configuration information must be specified prior to
1367 1.7 mrg building GCC. The <samp><span class="file">include/xtensa-config.h</span></samp> header
1368 1.1 mrg file contains the configuration information. If you created your
1369 1.1 mrg own Xtensa configuration with the Xtensa Processor Generator, the
1370 1.1 mrg downloaded files include a customized copy of this header file,
1371 1.1 mrg which you can use to replace the default header file.
1372 1.7 mrg
1373 1.7 mrg <p><hr /><a name="xtensa_002dx_002dlinux"></a>
1374 1.7 mrg
1375 1.7 mrg <h3 class="heading"><a name="TOC73"></a>xtensa*-*-linux*</h3>
1376 1.7 mrg
1377 1.1 mrg <p>This target is for Xtensa systems running GNU/Linux. It supports ELF
1378 1.1 mrg shared objects and the GNU C library (glibc). It also generates
1379 1.1 mrg position-independent code (PIC) regardless of whether the
1380 1.7 mrg <samp><span class="option">-fpic</span></samp> or <samp><span class="option">-fPIC</span></samp> options are used. In other
1381 1.1 mrg respects, this target is the same as the
1382 1.7 mrg <a href="#xtensa*-*-elf">‘<samp><span class="samp">xtensa*-*-elf</span></samp>’</a> target.
1383 1.7 mrg
1384 1.7 mrg <p><hr /><a name="windows"></a>
1385 1.7 mrg
1386 1.7 mrg <h3 class="heading"><a name="TOC74"></a>Microsoft Windows</h3>
1387 1.7 mrg
1388 1.7 mrg <h4 class="subheading"><a name="TOC75"></a>Intel 16-bit versions</h4>
1389 1.1 mrg
1390 1.1 mrg <p>The 16-bit versions of Microsoft Windows, such as Windows 3.1, are not
1391 1.1 mrg supported.
1392 1.7 mrg
1393 1.7 mrg <p>However, the 32-bit port has limited support for Microsoft
1394 1.1 mrg Windows 3.11 in the Win32s environment, as a target only. See below.
1395 1.7 mrg
1396 1.7 mrg <h4 class="subheading"><a name="TOC76"></a>Intel 32-bit versions</h4>
1397 1.7 mrg
1398 1.1 mrg <p>The 32-bit versions of Windows, including Windows 95, Windows NT, Windows
1399 1.1 mrg XP, and Windows Vista, are supported by several different target
1400 1.1 mrg platforms. These targets differ in which Windows subsystem they target
1401 1.1 mrg and which C libraries are used.
1402 1.1 mrg
1403 1.7 mrg <ul>
1404 1.7 mrg <li>Cygwin <a href="#x-x-cygwin">*-*-cygwin</a>: Cygwin provides a user-space
1405 1.7 mrg Linux API emulation layer in the Win32 subsystem.
1406 1.7 mrg <li>Interix <a href="#x-x-interix">*-*-interix</a>: The Interix subsystem
1407 1.7 mrg provides native support for POSIX.
1408 1.7 mrg <li>MinGW <a href="#x-x-mingw32">*-*-mingw32</a>: MinGW is a native GCC port for
1409 1.7 mrg the Win32 subsystem that provides a subset of POSIX.
1410 1.7 mrg <li>MKS i386-pc-mks: NuTCracker from MKS. See
1411 1.7 mrg <a href="http://www.mkssoftware.com/">http://www.mkssoftware.com/</a> for more information.
1412 1.7 mrg </ul>
1413 1.7 mrg
1414 1.7 mrg <h4 class="subheading"><a name="TOC77"></a>Intel 64-bit versions</h4>
1415 1.7 mrg
1416 1.1 mrg <p>GCC contains support for x86-64 using the mingw-w64
1417 1.7 mrg runtime library, available from <a href="http://mingw-w64.sourceforge.net/">http://mingw-w64.sourceforge.net/</a>.
1418 1.1 mrg This library should be used with the target triple x86_64-pc-mingw32.
1419 1.7 mrg
1420 1.7 mrg <p>Presently Windows for Itanium is not supported.
1421 1.7 mrg
1422 1.7 mrg <h4 class="subheading"><a name="TOC78"></a>Windows CE</h4>
1423 1.7 mrg
1424 1.3 skrll <p>Windows CE is supported as a target only on Hitachi
1425 1.1 mrg SuperH (sh-wince-pe), and MIPS (mips-wince-pe).
1426 1.7 mrg
1427 1.7 mrg <h4 class="subheading"><a name="TOC79"></a>Other Windows Platforms</h4>
1428 1.7 mrg
1429 1.1 mrg <p>GCC no longer supports Windows NT on the Alpha or PowerPC.
1430 1.7 mrg
1431 1.7 mrg <p>GCC no longer supports the Windows POSIX subsystem. However, it does
1432 1.1 mrg support the Interix subsystem. See above.
1433 1.7 mrg
1434 1.7 mrg <p>Old target names including *-*-winnt and *-*-windowsnt are no longer used.
1435 1.7 mrg
1436 1.7 mrg <p>PW32 (i386-pc-pw32) support was never completed, and the project seems to
1437 1.1 mrg be inactive. See <a href="http://pw32.sourceforge.net/">http://pw32.sourceforge.net/</a> for more information.
1438 1.7 mrg
1439 1.7 mrg <p>UWIN support has been removed due to a lack of maintenance.
1440 1.7 mrg
1441 1.7 mrg <p><hr /><a name="x_002dx_002dcygwin"></a>
1442 1.7 mrg
1443 1.7 mrg <h3 class="heading"><a name="TOC80"></a>*-*-cygwin</h3>
1444 1.7 mrg
1445 1.1 mrg <p>Ports of GCC are included with the
1446 1.1 mrg <a href="http://www.cygwin.com/">Cygwin environment</a>.
1447 1.7 mrg
1448 1.7 mrg <p>GCC will build under Cygwin without modification; it does not build
1449 1.7 mrg with Microsoft's C++ compiler and there are no plans to make it do so.
1450 1.7 mrg
1451 1.7 mrg <p>The Cygwin native compiler can be configured to target any 32-bit x86
1452 1.1 mrg cpu architecture desired; the default is i686-pc-cygwin. It should be
1453 1.1 mrg used with as up-to-date a version of binutils as possible; use either
1454 1.1 mrg the latest official GNU binutils release in the Cygwin distribution,
1455 1.1 mrg or version 2.20 or above if building your own.
1456 1.7 mrg
1457 1.7 mrg <p><hr /><a name="x_002dx_002dinterix"></a>
1458 1.7 mrg
1459 1.7 mrg <h3 class="heading"><a name="TOC81"></a>*-*-interix</h3>
1460 1.7 mrg
1461 1.1 mrg <p>The Interix target is used by OpenNT, Interix, Services For UNIX (SFU),
1462 1.1 mrg and Subsystem for UNIX-based Applications (SUA). Applications compiled
1463 1.1 mrg with this target run in the Interix subsystem, which is separate from
1464 1.1 mrg the Win32 subsystem. This target was last known to work in GCC 3.3.
1465 1.7 mrg
1466 1.7 mrg <p><hr /><a name="x_002dx_002dmingw32"></a>
1467 1.7 mrg
1468 1.7 mrg <h3 class="heading"><a name="TOC82"></a>*-*-mingw32</h3>
1469 1.7 mrg
1470 1.7 mrg <p>GCC will build with and support only MinGW runtime 3.12 and later.
1471 1.1 mrg Earlier versions of headers are incompatible with the new default semantics
1472 1.1 mrg of <code>extern inline</code> in <code>-std=c99</code> and <code>-std=gnu99</code> modes.
1473 1.7 mrg
1474 1.7 mrg <p><hr /><a name="older"></a>
1475 1.7 mrg
1476 1.7 mrg <h3 class="heading"><a name="TOC83"></a>Older systems</h3>
1477 1.7 mrg
1478 1.1 mrg <p>GCC contains support files for many older (1980s and early
1479 1.1 mrg 1990s) Unix variants. For the most part, support for these systems
1480 1.1 mrg has not been deliberately removed, but it has not been maintained for
1481 1.1 mrg several years and may suffer from bitrot.
1482 1.7 mrg
1483 1.7 mrg <p>Starting with GCC 3.1, each release has a list of “obsoleted” systems.
1484 1.1 mrg Support for these systems is still present in that release, but
1485 1.7 mrg <samp><span class="command">configure</span></samp> will fail unless the <samp><span class="option">--enable-obsolete</span></samp>
1486 1.1 mrg option is given. Unless a maintainer steps forward, support for these
1487 1.1 mrg systems will be removed from the next release of GCC.
1488 1.7 mrg
1489 1.7 mrg <p>Support for old systems as hosts for GCC can cause problems if the
1490 1.1 mrg workarounds for compiler, library and operating system bugs affect the
1491 1.1 mrg cleanliness or maintainability of the rest of GCC. In some cases, to
1492 1.1 mrg bring GCC up on such a system, if still possible with current GCC, may
1493 1.1 mrg require first installing an old version of GCC which did work on that
1494 1.1 mrg system, and using it to compile a more recent GCC, to avoid bugs in the
1495 1.1 mrg vendor compiler. Old releases of GCC 1 and GCC 2 are available in the
1496 1.7 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
1497 1.7 mrg <samp><span class="command">fixincludes</span></samp>, but bugs or deficiencies in libraries and the
1498 1.1 mrg operating system may still cause problems.
1499 1.7 mrg
1500 1.7 mrg <p>Support for older systems as targets for cross-compilation is less
1501 1.1 mrg problematic than support for them as hosts for GCC; if an enthusiast
1502 1.1 mrg wishes to make such a target work again (including resurrecting any of
1503 1.1 mrg the targets that never worked with GCC 2, starting from the last
1504 1.1 mrg version before they were removed), patches
1505 1.1 mrg <a href="../contribute.html">following the usual requirements</a> would be
1506 1.1 mrg likely to be accepted, since they should not affect the support for more
1507 1.1 mrg modern targets.
1508 1.7 mrg
1509 1.7 mrg <p>For some systems, old versions of GNU binutils may also be useful,
1510 1.7 mrg and are available from <samp><span class="file">pub/binutils/old-releases</span></samp> on
1511 1.1 mrg <a href="http://sourceware.org/mirrors.html">sourceware.org mirror sites</a>.
1512 1.7 mrg
1513 1.7 mrg <p>Some of the information on specific systems above relates to
1514 1.1 mrg such older systems, but much of the information
1515 1.1 mrg about GCC on such systems (which may no longer be applicable to
1516 1.1 mrg current GCC) is to be found in the GCC texinfo manual.
1517 1.7 mrg
1518 1.7 mrg <p><hr /><a name="elf"></a>
1519 1.7 mrg
1520 1.7 mrg <h3 class="heading"><a name="TOC84"></a>all ELF targets (SVR4, Solaris 2, etc.)</h3>
1521 1.7 mrg
1522 1.1 mrg <p>C++ support is significantly better on ELF targets if you use the
1523 1.1 mrg <a href="./configure.html#with-gnu-ld">GNU linker</a>; duplicate copies of
1524 1.1 mrg inlines, vtables and template instantiations will be discarded
1525 1.1 mrg automatically.
1526 1.1 mrg
1527 1.7 mrg <p><hr />
1528 1.1 mrg <p><a href="./index.html">Return to the GCC Installation page</a>
1529 1.1 mrg
1530 1.7 mrg <!-- ***Old documentation****************************************************** -->
1531 1.7 mrg <!-- ***GFDL******************************************************************** -->
1532 1.7 mrg <!-- *************************************************************************** -->
1533 1.7 mrg <!-- Part 6 The End of the Document -->
1534 1.7 mrg </body></html>
1535 1.1 mrg
1536