specific.html revision 1.5 1 1.1 mrg <html lang="en">
2 1.1 mrg <head>
3 1.1 mrg <title>Host/Target specific installation notes for GCC</title>
4 1.1 mrg <meta http-equiv="Content-Type" content="text/html">
5 1.1 mrg <meta name="description" content="Host/Target specific installation notes for GCC">
6 1.1 mrg <meta name="generator" content="makeinfo 4.12">
7 1.1 mrg <link title="Top" rel="top" href="#Top">
8 1.1 mrg <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
9 1.1 mrg <!--
10 1.3 mrg Copyright (C) 1988-2015 Free Software Foundation, Inc.
11 1.1 mrg
12 1.1 mrg Permission is granted to copy, distribute and/or modify this document
13 1.3 mrg under the terms of the GNU Free Documentation License, Version 1.3 or
14 1.1 mrg any later version published by the Free Software Foundation; with no
15 1.1 mrg Invariant Sections, the Front-Cover texts being (a) (see below), and
16 1.1 mrg with the Back-Cover Texts being (b) (see below). A copy of the
17 1.1 mrg license is included in the section entitled "GNU Free Documentation License".
18 1.1 mrg
19 1.1 mrg (a) The FSF's Front-Cover Text is:
20 1.1 mrg
21 1.1 mrg A GNU Manual
22 1.1 mrg
23 1.1 mrg (b) The FSF's Back-Cover Text is:
24 1.1 mrg
25 1.1 mrg You have freedom to copy and modify this GNU Manual, like GNU
26 1.1 mrg software. Copies published by the Free Software Foundation raise
27 1.1 mrg funds for GNU development.-->
28 1.1 mrg <meta http-equiv="Content-Style-Type" content="text/css">
29 1.1 mrg <style type="text/css"><!--
30 1.1 mrg pre.display { font-family:inherit }
31 1.1 mrg pre.format { font-family:inherit }
32 1.1 mrg pre.smalldisplay { font-family:inherit; font-size:smaller }
33 1.1 mrg pre.smallformat { font-family:inherit; font-size:smaller }
34 1.1 mrg pre.smallexample { font-size:smaller }
35 1.1 mrg pre.smalllisp { font-size:smaller }
36 1.1 mrg span.sc { font-variant:small-caps }
37 1.1 mrg span.roman { font-family:serif; font-weight:normal; }
38 1.1 mrg span.sansserif { font-family:sans-serif; font-weight:normal; }
39 1.1 mrg --></style>
40 1.1 mrg </head>
41 1.1 mrg <body>
42 1.1 mrg <h1 class="settitle">Host/Target specific installation notes for GCC</h1>
43 1.1 mrg <a name="index-Specific-1"></a><a name="index-Specific-installation-notes-2"></a><a name="index-Target-specific-installation-3"></a><a name="index-Host-specific-installation-4"></a><a name="index-Target-specific-installation-notes-5"></a>
44 1.1 mrg Please read this document carefully <em>before</em> installing the
45 1.1 mrg GNU Compiler Collection on your machine.
46 1.1 mrg
47 1.1 mrg <p>Note that this list of install notes is <em>not</em> a list of supported
48 1.1 mrg hosts or targets. Not all supported hosts and targets are listed
49 1.1 mrg here, only the ones that require host-specific or target-specific
50 1.3 mrg information have to.
51 1.1 mrg
52 1.1 mrg <ul>
53 1.5 mrg <li><a href="#aarch64-x-x">aarch64*-*-*</a>
54 1.1 mrg <li><a href="#alpha-x-x">alpha*-*-*</a>
55 1.3 mrg <li><a href="#alpha-dec-osf51">alpha*-dec-osf5.1</a>
56 1.3 mrg <li><a href="#amd64-x-solaris210">amd64-*-solaris2.10</a>
57 1.3 mrg <li><a href="#arm-x-eabi">arm-*-eabi</a>
58 1.1 mrg <li><a href="#avr">avr</a>
59 1.1 mrg <li><a href="#bfin">Blackfin</a>
60 1.1 mrg <li><a href="#dos">DOS</a>
61 1.1 mrg <li><a href="#x-x-freebsd">*-*-freebsd*</a>
62 1.1 mrg <li><a href="#h8300-hms">h8300-hms</a>
63 1.1 mrg <li><a href="#hppa-hp-hpux">hppa*-hp-hpux*</a>
64 1.1 mrg <li><a href="#hppa-hp-hpux10">hppa*-hp-hpux10</a>
65 1.1 mrg <li><a href="#hppa-hp-hpux11">hppa*-hp-hpux11</a>
66 1.1 mrg <li><a href="#x-x-linux-gnu">*-*-linux-gnu</a>
67 1.1 mrg <li><a href="#ix86-x-linux">i?86-*-linux*</a>
68 1.1 mrg <li><a href="#ix86-x-solaris210">i?86-*-solaris2.10</a>
69 1.1 mrg <li><a href="#ia64-x-linux">ia64-*-linux</a>
70 1.1 mrg <li><a href="#ia64-x-hpux">ia64-*-hpux*</a>
71 1.1 mrg <li><a href="#x-ibm-aix">*-ibm-aix*</a>
72 1.1 mrg <li><a href="#iq2000-x-elf">iq2000-*-elf</a>
73 1.1 mrg <li><a href="#lm32-x-elf">lm32-*-elf</a>
74 1.1 mrg <li><a href="#lm32-x-uclinux">lm32-*-uclinux</a>
75 1.1 mrg <li><a href="#m32c-x-elf">m32c-*-elf</a>
76 1.1 mrg <li><a href="#m32r-x-elf">m32r-*-elf</a>
77 1.1 mrg <li><a href="#m68k-x-x">m68k-*-*</a>
78 1.1 mrg <li><a href="#m68k-uclinux">m68k-uclinux</a>
79 1.1 mrg <li><a href="#mep-x-elf">mep-*-elf</a>
80 1.3 mrg <li><a href="#microblaze-x-elf">microblaze-*-elf</a>
81 1.1 mrg <li><a href="#mips-x-x">mips-*-*</a>
82 1.1 mrg <li><a href="#mips-sgi-irix5">mips-sgi-irix5</a>
83 1.1 mrg <li><a href="#mips-sgi-irix6">mips-sgi-irix6</a>
84 1.5 mrg <li><a href="#nds32le-x-elf">nds32le-*-elf</a>
85 1.5 mrg <li><a href="#nds32be-x-elf">nds32be-*-elf</a>
86 1.5 mrg <li><a href="#nvptx-x-none">nvptx-*-none</a>
87 1.1 mrg <li><a href="#powerpc-x-x">powerpc*-*-*</a>
88 1.1 mrg <li><a href="#powerpc-x-darwin">powerpc-*-darwin*</a>
89 1.1 mrg <li><a href="#powerpc-x-elf">powerpc-*-elf</a>
90 1.1 mrg <li><a href="#powerpc-x-linux-gnu">powerpc*-*-linux-gnu*</a>
91 1.1 mrg <li><a href="#powerpc-x-netbsd">powerpc-*-netbsd*</a>
92 1.1 mrg <li><a href="#powerpc-x-eabisim">powerpc-*-eabisim</a>
93 1.1 mrg <li><a href="#powerpc-x-eabi">powerpc-*-eabi</a>
94 1.1 mrg <li><a href="#powerpcle-x-elf">powerpcle-*-elf</a>
95 1.1 mrg <li><a href="#powerpcle-x-eabisim">powerpcle-*-eabisim</a>
96 1.1 mrg <li><a href="#powerpcle-x-eabi">powerpcle-*-eabi</a>
97 1.1 mrg <li><a href="#s390-x-linux">s390-*-linux*</a>
98 1.1 mrg <li><a href="#s390x-x-linux">s390x-*-linux*</a>
99 1.1 mrg <li><a href="#s390x-ibm-tpf">s390x-ibm-tpf*</a>
100 1.1 mrg <li><a href="#x-x-solaris2">*-*-solaris2*</a>
101 1.3 mrg <li><a href="#sparc-x-x">sparc*-*-*</a>
102 1.1 mrg <li><a href="#sparc-sun-solaris2">sparc-sun-solaris2*</a>
103 1.1 mrg <li><a href="#sparc-sun-solaris210">sparc-sun-solaris2.10</a>
104 1.1 mrg <li><a href="#sparc-x-linux">sparc-*-linux*</a>
105 1.1 mrg <li><a href="#sparc64-x-solaris2">sparc64-*-solaris2*</a>
106 1.1 mrg <li><a href="#sparcv9-x-solaris2">sparcv9-*-solaris2*</a>
107 1.3 mrg <li><a href="#c6x-x-x">c6x-*-*</a>
108 1.3 mrg <li><a href="#tilegx-x-linux">tilegx-*-linux*</a>
109 1.5 mrg <li><a href="#tilegxbe-x-linux">tilegxbe-*-linux*</a>
110 1.3 mrg <li><a href="#tilepro-x-linux">tilepro-*-linux*</a>
111 1.5 mrg <li><a href="#visium-x-elf">visium-*-elf</a>
112 1.1 mrg <li><a href="#x-x-vxworks">*-*-vxworks*</a>
113 1.1 mrg <li><a href="#x86-64-x-x">x86_64-*-*</a> amd64-*-*
114 1.3 mrg <li><a href="#x86-64-x-solaris210">x86_64-*-solaris2.1[0-9]*</a>
115 1.1 mrg <li><a href="#xtensa-x-elf">xtensa*-*-elf</a>
116 1.1 mrg <li><a href="#xtensa-x-linux">xtensa*-*-linux*</a>
117 1.1 mrg <li><a href="#windows">Microsoft Windows</a>
118 1.1 mrg <li><a href="#x-x-cygwin">*-*-cygwin</a>
119 1.1 mrg <li><a href="#x-x-interix">*-*-interix</a>
120 1.1 mrg <li><a href="#x-x-mingw32">*-*-mingw32</a>
121 1.1 mrg <li><a href="#os2">OS/2</a>
122 1.1 mrg <li><a href="#older">Older systems</a>
123 1.1 mrg </ul>
124 1.1 mrg
125 1.1 mrg <ul>
126 1.1 mrg <li><a href="#elf">all ELF targets</a> (SVR4, Solaris 2, etc.)
127 1.1 mrg </ul>
128 1.1 mrg
129 1.1 mrg <p><!-- -------- host/target specific issues start here ---------------- -->
130 1.5 mrg <hr /><a name="aarch64_002dx_002dx"></a>
131 1.1 mrg
132 1.5 mrg <h3 class="heading"><a name="TOC0"></a>aarch64*-*-*</h3>
133 1.3 mrg
134 1.5 mrg <p>Binutils pre 2.24 does not have support for selecting <samp><span class="option">-mabi</span></samp> and
135 1.5 mrg does not support ILP32. If it is used to build GCC 4.9 or later, GCC will
136 1.5 mrg not support option <samp><span class="option">-mabi=ilp32</span></samp>.
137 1.5 mrg
138 1.5 mrg <p>To enable a workaround for the Cortex-A53 erratum number 835769 by default
139 1.3 mrg (for all CPUs regardless of -mcpu option given) at configure time use the
140 1.3 mrg <samp><span class="option">--enable-fix-cortex-a53-835769</span></samp> option. This will enable the fix by
141 1.5 mrg default and can be explicitly disabled during compilation by passing the
142 1.3 mrg <samp><span class="option">-mno-fix-cortex-a53-835769</span></samp> option. Conversely,
143 1.3 mrg <samp><span class="option">--disable-fix-cortex-a53-835769</span></samp> will disable the workaround by
144 1.3 mrg default. The workaround is disabled by default if neither of
145 1.3 mrg <samp><span class="option">--enable-fix-cortex-a53-835769</span></samp> or
146 1.3 mrg <samp><span class="option">--disable-fix-cortex-a53-835769</span></samp> is given at configure time.
147 1.3 mrg
148 1.5 mrg <p>To enable a workaround for the Cortex-A53 erratum number 843419 by default
149 1.5 mrg (for all CPUs regardless of -mcpu option given) at configure time use the
150 1.5 mrg <samp><span class="option">--enable-fix-cortex-a53-843419</span></samp> option. This workaround is applied at
151 1.5 mrg link time. Enabling the workaround will cause GCC to pass the relevant option
152 1.5 mrg to the linker. It can be explicitly disabled during compilation by passing the
153 1.5 mrg <samp><span class="option">-mno-fix-cortex-a53-843419</span></samp> option. Conversely,
154 1.5 mrg <samp><span class="option">--disable-fix-cortex-a53-843419</span></samp> will disable the workaround by default.
155 1.5 mrg The workaround is disabled by default if neither of
156 1.5 mrg <samp><span class="option">--enable-fix-cortex-a53-843419</span></samp> or
157 1.5 mrg <samp><span class="option">--disable-fix-cortex-a53-843419</span></samp> is given at configure time.
158 1.5 mrg
159 1.5 mrg <p><hr /><a name="alpha_002dx_002dx"></a>
160 1.5 mrg
161 1.5 mrg <h3 class="heading"><a name="TOC1"></a>alpha*-*-*</h3>
162 1.1 mrg
163 1.1 mrg <p>This section contains general configuration information for all
164 1.1 mrg alpha-based platforms using ELF (in particular, ignore this section for
165 1.1 mrg DEC OSF/1, Digital UNIX and Tru64 UNIX). In addition to reading this
166 1.1 mrg section, please read all other sections that match your target.
167 1.1 mrg
168 1.1 mrg <p>We require binutils 2.11.2 or newer.
169 1.1 mrg Previous binutils releases had a number of problems with DWARF 2
170 1.1 mrg debugging information, not the least of which is incorrect linking of
171 1.1 mrg shared libraries.
172 1.1 mrg
173 1.5 mrg <p><hr /><a name="alpha_002ddec_002dosf51"></a>
174 1.1 mrg
175 1.5 mrg <h3 class="heading"><a name="TOC2"></a>alpha*-dec-osf5.1</h3>
176 1.1 mrg
177 1.1 mrg <p>Systems using processors that implement the DEC Alpha architecture and
178 1.1 mrg are running the DEC/Compaq/HP Unix (DEC OSF/1, Digital UNIX, or Compaq/HP
179 1.1 mrg Tru64 UNIX) operating system, for example the DEC Alpha AXP systems.
180 1.1 mrg
181 1.3 mrg <p>Support for Tru64 UNIX V5.1 has been removed in GCC 4.8. As of GCC 4.6,
182 1.3 mrg support for Tru64 UNIX V4.0 and V5.0 has been removed. As of GCC 3.2,
183 1.3 mrg versions before <code>alpha*-dec-osf4</code> are no longer supported. (These
184 1.3 mrg are the versions which identify themselves as DEC OSF/1.)
185 1.1 mrg
186 1.5 mrg <p><hr /><a name="amd64_002dx_002dsolaris210"></a>
187 1.1 mrg
188 1.5 mrg <h3 class="heading"><a name="TOC3"></a>amd64-*-solaris2.1[0-9]*</h3>
189 1.1 mrg
190 1.3 mrg <p>This is a synonym for ‘<samp><span class="samp">x86_64-*-solaris2.1[0-9]*</span></samp>’.
191 1.1 mrg
192 1.5 mrg <p><hr /><a name="arc_002dx_002delf32"></a>
193 1.5 mrg
194 1.5 mrg <h3 class="heading"><a name="TOC4"></a>arc-*-elf32</h3>
195 1.5 mrg
196 1.5 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 1.5 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 1.5 mrg or ‘<samp><span class="samp">arc700</span></samp>’.
199 1.5 mrg
200 1.5 mrg <p><hr /><a name="arc_002dlinux_002duclibc"></a>
201 1.5 mrg
202 1.5 mrg <h3 class="heading"><a name="TOC5"></a>arc-linux-uclibc</h3>
203 1.5 mrg
204 1.5 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 1.5 mrg
206 1.5 mrg <p><hr /><a name="arm_002dx_002deabi"></a>
207 1.1 mrg
208 1.5 mrg <h3 class="heading"><a name="TOC6"></a>arm-*-eabi</h3>
209 1.1 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 mrg <code>arm-*-netbsdelf</code>, <code>arm-*-*linux-*</code>
213 1.3 mrg and <code>arm-*-rtemseabi</code>.
214 1.1 mrg
215 1.5 mrg <p><hr /><a name="avr"></a>
216 1.1 mrg
217 1.5 mrg <h3 class="heading"><a name="TOC7"></a>avr</h3>
218 1.1 mrg
219 1.1 mrg <p>ATMEL AVR-family micro controllers. These are used in embedded
220 1.1 mrg applications. There are no standard Unix configurations.
221 1.1 mrg See “AVR Options” in the main manual
222 1.1 mrg for the list of supported MCU types.
223 1.1 mrg
224 1.1 mrg <p>Use ‘<samp><span class="samp">configure --target=avr --enable-languages="c"</span></samp>’ to configure GCC.
225 1.1 mrg
226 1.1 mrg <p>Further installation notes and other useful information about AVR tools
227 1.1 mrg can also be obtained from:
228 1.1 mrg
229 1.1 mrg <ul>
230 1.1 mrg <li><a href="http://www.nongnu.org/avr/">http://www.nongnu.org/avr/</a>
231 1.1 mrg <li><a href="http://www.amelek.gda.pl/avr/">http://www.amelek.gda.pl/avr/</a>
232 1.1 mrg </ul>
233 1.1 mrg
234 1.1 mrg <p>We <em>strongly</em> recommend using binutils 2.13 or newer.
235 1.1 mrg
236 1.1 mrg <p>The following error:
237 1.3 mrg <pre class="smallexample"> Error: register required
238 1.1 mrg </pre>
239 1.1 mrg <p>indicates that you should upgrade to a newer version of the binutils.
240 1.1 mrg
241 1.5 mrg <p><hr /><a name="bfin"></a>
242 1.1 mrg
243 1.5 mrg <h3 class="heading"><a name="TOC8"></a>Blackfin</h3>
244 1.1 mrg
245 1.1 mrg <p>The Blackfin processor, an Analog Devices DSP.
246 1.1 mrg See “Blackfin Options” in the main manual
247 1.1 mrg
248 1.1 mrg <p>More information, and a version of binutils with support for this processor,
249 1.1 mrg is available at <a href="http://blackfin.uclinux.org">http://blackfin.uclinux.org</a>
250 1.1 mrg
251 1.5 mrg <p><hr /><a name="cr16"></a>
252 1.1 mrg
253 1.5 mrg <h3 class="heading"><a name="TOC9"></a>CR16</h3>
254 1.3 mrg
255 1.5 mrg <p>The CR16 CompactRISC architecture is a 16-bit architecture. This
256 1.5 mrg architecture is used in embedded applications.
257 1.3 mrg
258 1.3 mrg <p>See “CR16 Options” in the main manual for a list of CR16-specific options.
259 1.3 mrg
260 1.3 mrg <p>Use ‘<samp><span class="samp">configure --target=cr16-elf --enable-languages=c,c++</span></samp>’ to configure
261 1.3 mrg GCC for building a CR16 elf cross-compiler.
262 1.3 mrg
263 1.5 mrg <p>Use ‘<samp><span class="samp">configure --target=cr16-uclinux --enable-languages=c,c++</span></samp>’ to
264 1.5 mrg configure GCC for building a CR16 uclinux cross-compiler.
265 1.3 mrg
266 1.5 mrg <p><hr /><a name="cris"></a>
267 1.3 mrg
268 1.5 mrg <h3 class="heading"><a name="TOC10"></a>CRIS</h3>
269 1.1 mrg
270 1.1 mrg <p>CRIS is the CPU architecture in Axis Communications ETRAX system-on-a-chip
271 1.1 mrg series. These are used in embedded applications.
272 1.1 mrg
273 1.1 mrg <p>See “CRIS Options” in the main manual
274 1.1 mrg for a list of CRIS-specific options.
275 1.1 mrg
276 1.1 mrg <p>There are a few different CRIS targets:
277 1.1 mrg <dl>
278 1.1 mrg <dt><code>cris-axis-elf</code><dd>Mainly for monolithic embedded systems. Includes a multilib for the
279 1.1 mrg ‘<samp><span class="samp">v10</span></samp>’ core used in ‘<samp><span class="samp">ETRAX 100 LX</span></samp>’.
280 1.1 mrg <br><dt><code>cris-axis-linux-gnu</code><dd>A GNU/Linux port for the CRIS architecture, currently targeting
281 1.1 mrg ‘<samp><span class="samp">ETRAX 100 LX</span></samp>’ by default.
282 1.1 mrg </dl>
283 1.1 mrg
284 1.1 mrg <p>For <code>cris-axis-elf</code> you need binutils 2.11
285 1.1 mrg or newer. For <code>cris-axis-linux-gnu</code> you need binutils 2.12 or newer.
286 1.1 mrg
287 1.1 mrg <p>Pre-packaged tools can be obtained from
288 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
289 1.1 mrg information about this platform is available at
290 1.1 mrg <a href="http://developer.axis.com/">http://developer.axis.com/</a>.
291 1.1 mrg
292 1.5 mrg <p><hr /><a name="dos"></a>
293 1.1 mrg
294 1.5 mrg <h3 class="heading"><a name="TOC11"></a>DOS</h3>
295 1.1 mrg
296 1.1 mrg <p>Please have a look at the <a href="binaries.html">binaries page</a>.
297 1.1 mrg
298 1.1 mrg <p>You cannot install GCC by itself on MSDOS; it will not compile under
299 1.1 mrg any MSDOS compiler except itself. You need to get the complete
300 1.1 mrg compilation package DJGPP, which includes binaries as well as sources,
301 1.1 mrg and includes all the necessary compilation tools and libraries.
302 1.1 mrg
303 1.5 mrg <p><hr /><a name="epiphany_002dx_002delf"></a>
304 1.1 mrg
305 1.5 mrg <h3 class="heading"><a name="TOC12"></a>epiphany-*-elf</h3>
306 1.3 mrg
307 1.3 mrg <p>Adapteva Epiphany.
308 1.3 mrg This configuration is intended for embedded systems.
309 1.3 mrg
310 1.5 mrg <p><hr /><a name="x_002dx_002dfreebsd"></a>
311 1.3 mrg
312 1.5 mrg <h3 class="heading"><a name="TOC13"></a>*-*-freebsd*</h3>
313 1.1 mrg
314 1.1 mrg <p>Support for FreeBSD 1 was discontinued in GCC 3.2. Support for
315 1.1 mrg FreeBSD 2 (and any mutant a.out variants of FreeBSD 3) was
316 1.1 mrg discontinued in GCC 4.0.
317 1.1 mrg
318 1.3 mrg <p>In order to better utilize FreeBSD base system functionality and match
319 1.3 mrg the configuration of the system compiler, GCC 4.5 and above as well as
320 1.3 mrg GCC 4.4 past 2010-06-20 leverage SSP support in libc (which is present
321 1.3 mrg on FreeBSD 7 or later) and the use of <code>__cxa_atexit</code> by default
322 1.3 mrg (on FreeBSD 6 or later). The use of <code>dl_iterate_phdr</code> inside
323 1.3 mrg <samp><span class="file">libgcc_s.so.1</span></samp> and boehm-gc (on FreeBSD 7 or later) is enabled
324 1.3 mrg by GCC 4.5 and above.
325 1.1 mrg
326 1.1 mrg <p>We support FreeBSD using the ELF file format with DWARF 2 debugging
327 1.1 mrg for all CPU architectures. You may use <samp><span class="option">-gstabs</span></samp> instead of
328 1.1 mrg <samp><span class="option">-g</span></samp>, if you really want the old debugging format. There are
329 1.1 mrg no known issues with mixing object files and libraries with different
330 1.1 mrg debugging formats. Otherwise, this release of GCC should now match
331 1.1 mrg more of the configuration used in the stock FreeBSD configuration of
332 1.1 mrg GCC. In particular, <samp><span class="option">--enable-threads</span></samp> is now configured by
333 1.1 mrg default. However, as a general user, do not attempt to replace the
334 1.1 mrg system compiler with this release. Known to bootstrap and check with
335 1.1 mrg good results on FreeBSD 7.2-STABLE. In the past, known to bootstrap
336 1.1 mrg and check with good results on FreeBSD 3.0, 3.4, 4.0, 4.2, 4.3, 4.4,
337 1.1 mrg 4.5, 4.8, 4.9 and 5-CURRENT.
338 1.1 mrg
339 1.1 mrg <p>The version of binutils installed in <samp><span class="file">/usr/bin</span></samp> probably works
340 1.1 mrg with this release of GCC. Bootstrapping against the latest GNU
341 1.1 mrg binutils and/or the version found in <samp><span class="file">/usr/ports/devel/binutils</span></samp> has
342 1.1 mrg been known to enable additional features and improve overall testsuite
343 1.1 mrg results. However, it is currently known that boehm-gc (which itself
344 1.1 mrg is required for java) may not configure properly on FreeBSD prior to
345 1.1 mrg the FreeBSD 7.0 release with GNU binutils after 2.16.1.
346 1.1 mrg
347 1.5 mrg <p><hr /><a name="h8300_002dhms"></a>
348 1.1 mrg
349 1.5 mrg <h3 class="heading"><a name="TOC14"></a>h8300-hms</h3>
350 1.1 mrg
351 1.1 mrg <p>Renesas H8/300 series of processors.
352 1.1 mrg
353 1.1 mrg <p>Please have a look at the <a href="binaries.html">binaries page</a>.
354 1.1 mrg
355 1.1 mrg <p>The calling convention and structure layout has changed in release 2.6.
356 1.1 mrg All code must be recompiled. The calling convention now passes the
357 1.1 mrg first three arguments in function calls in registers. Structures are no
358 1.1 mrg longer a multiple of 2 bytes.
359 1.1 mrg
360 1.5 mrg <p><hr /><a name="hppa_002dhp_002dhpux"></a>
361 1.1 mrg
362 1.5 mrg <h3 class="heading"><a name="TOC15"></a>hppa*-hp-hpux*</h3>
363 1.1 mrg
364 1.1 mrg <p>Support for HP-UX version 9 and older was discontinued in GCC 3.4.
365 1.1 mrg
366 1.1 mrg <p>We require using gas/binutils on all hppa platforms. Version 2.19 or
367 1.1 mrg later is recommended.
368 1.1 mrg
369 1.1 mrg <p>It may be helpful to configure GCC with the
370 1.1 mrg <a href="./configure.html#with-gnu-as"><samp><span class="option">--with-gnu-as</span></samp></a> and
371 1.1 mrg <samp><span class="option">--with-as=...</span></samp> options to ensure that GCC can find GAS.
372 1.1 mrg
373 1.1 mrg <p>The HP assembler should not be used with GCC. It is rarely tested and may
374 1.1 mrg not work. It shouldn't be used with any languages other than C due to its
375 1.1 mrg many limitations.
376 1.1 mrg
377 1.1 mrg <p>Specifically, <samp><span class="option">-g</span></samp> does not work (HP-UX uses a peculiar debugging
378 1.1 mrg format which GCC does not know about). It also inserts timestamps
379 1.1 mrg into each object file it creates, causing the 3-stage comparison test to
380 1.1 mrg fail during a bootstrap. You should be able to continue by saying
381 1.1 mrg ‘<samp><span class="samp">make all-host all-target</span></samp>’ after getting the failure from ‘<samp><span class="samp">make</span></samp>’.
382 1.1 mrg
383 1.1 mrg <p>Various GCC features are not supported. For example, it does not support weak
384 1.1 mrg symbols or alias definitions. As a result, explicit template instantiations
385 1.1 mrg are required when using C++. This makes it difficult if not impossible to
386 1.1 mrg build many C++ applications.
387 1.1 mrg
388 1.1 mrg <p>There are two default scheduling models for instructions. These are
389 1.1 mrg PROCESSOR_7100LC and PROCESSOR_8000. They are selected from the pa-risc
390 1.1 mrg architecture specified for the target machine when configuring.
391 1.1 mrg PROCESSOR_8000 is the default. PROCESSOR_7100LC is selected when
392 1.1 mrg the target is a ‘<samp><span class="samp">hppa1*</span></samp>’ machine.
393 1.1 mrg
394 1.1 mrg <p>The PROCESSOR_8000 model is not well suited to older processors. Thus,
395 1.1 mrg it is important to completely specify the machine architecture when
396 1.1 mrg configuring if you want a model other than PROCESSOR_8000. The macro
397 1.1 mrg TARGET_SCHED_DEFAULT can be defined in BOOT_CFLAGS if a different
398 1.1 mrg default scheduling model is desired.
399 1.1 mrg
400 1.1 mrg <p>As of GCC 4.0, GCC uses the UNIX 95 namespace for HP-UX 10.10
401 1.1 mrg through 11.00, and the UNIX 98 namespace for HP-UX 11.11 and later.
402 1.1 mrg This namespace change might cause problems when bootstrapping with
403 1.1 mrg an earlier version of GCC or the HP compiler as essentially the same
404 1.1 mrg namespace is required for an entire build. This problem can be avoided
405 1.1 mrg in a number of ways. With HP cc, <samp><span class="env">UNIX_STD</span></samp> can be set to ‘<samp><span class="samp">95</span></samp>’
406 1.1 mrg or ‘<samp><span class="samp">98</span></samp>’. Another way is to add an appropriate set of predefines
407 1.1 mrg to <samp><span class="env">CC</span></samp>. The description for the <samp><span class="option">munix=</span></samp> option contains
408 1.1 mrg a list of the predefines used with each standard.
409 1.1 mrg
410 1.1 mrg <p>More specific information to ‘<samp><span class="samp">hppa*-hp-hpux*</span></samp>’ targets follows.
411 1.1 mrg
412 1.5 mrg <p><hr /><a name="hppa_002dhp_002dhpux10"></a>
413 1.1 mrg
414 1.5 mrg <h3 class="heading"><a name="TOC16"></a>hppa*-hp-hpux10</h3>
415 1.1 mrg
416 1.1 mrg <p>For hpux10.20, we <em>highly</em> recommend you pick up the latest sed patch
417 1.1 mrg <code>PHCO_19798</code> from HP.
418 1.1 mrg
419 1.1 mrg <p>The C++ ABI has changed incompatibly in GCC 4.0. COMDAT subspaces are
420 1.1 mrg used for one-only code and data. This resolves many of the previous
421 1.1 mrg problems in using C++ on this target. However, the ABI is not compatible
422 1.1 mrg with the one implemented under HP-UX 11 using secondary definitions.
423 1.1 mrg
424 1.5 mrg <p><hr /><a name="hppa_002dhp_002dhpux11"></a>
425 1.1 mrg
426 1.5 mrg <h3 class="heading"><a name="TOC17"></a>hppa*-hp-hpux11</h3>
427 1.1 mrg
428 1.1 mrg <p>GCC 3.0 and up support HP-UX 11. GCC 2.95.x is not supported and cannot
429 1.1 mrg be used to compile GCC 3.0 and up.
430 1.1 mrg
431 1.1 mrg <p>The libffi and libjava libraries haven't been ported to 64-bit HP-UX and don't build.
432 1.1 mrg
433 1.1 mrg <p>Refer to <a href="binaries.html">binaries</a> for information about obtaining
434 1.1 mrg precompiled GCC binaries for HP-UX. Precompiled binaries must be obtained
435 1.1 mrg to build the Ada language as it can't be bootstrapped using C. Ada is
436 1.1 mrg only available for the 32-bit PA-RISC runtime.
437 1.1 mrg
438 1.1 mrg <p>Starting with GCC 3.4 an ISO C compiler is required to bootstrap. The
439 1.1 mrg bundled compiler supports only traditional C; you will need either HP's
440 1.1 mrg unbundled compiler, or a binary distribution of GCC.
441 1.1 mrg
442 1.1 mrg <p>It is possible to build GCC 3.3 starting with the bundled HP compiler,
443 1.1 mrg but the process requires several steps. GCC 3.3 can then be used to
444 1.1 mrg build later versions. The fastjar program contains ISO C code and
445 1.1 mrg can't be built with the HP bundled compiler. This problem can be
446 1.1 mrg avoided by not building the Java language. For example, use the
447 1.1 mrg <samp><span class="option">--enable-languages="c,c++,f77,objc"</span></samp> option in your configure
448 1.1 mrg command.
449 1.1 mrg
450 1.1 mrg <p>There are several possible approaches to building the distribution.
451 1.1 mrg Binutils can be built first using the HP tools. Then, the GCC
452 1.1 mrg distribution can be built. The second approach is to build GCC
453 1.1 mrg first using the HP tools, then build binutils, then rebuild GCC.
454 1.1 mrg There have been problems with various binary distributions, so it
455 1.1 mrg is best not to start from a binary distribution.
456 1.1 mrg
457 1.1 mrg <p>On 64-bit capable systems, there are two distinct targets. Different
458 1.1 mrg installation prefixes must be used if both are to be installed on
459 1.1 mrg the same system. The ‘<samp><span class="samp">hppa[1-2]*-hp-hpux11*</span></samp>’ target generates code
460 1.1 mrg for the 32-bit PA-RISC runtime architecture and uses the HP linker.
461 1.1 mrg The ‘<samp><span class="samp">hppa64-hp-hpux11*</span></samp>’ target generates 64-bit code for the
462 1.1 mrg PA-RISC 2.0 architecture.
463 1.1 mrg
464 1.1 mrg <p>The script config.guess now selects the target type based on the compiler
465 1.1 mrg detected during configuration. You must define <samp><span class="env">PATH</span></samp> or <samp><span class="env">CC</span></samp> so
466 1.1 mrg that configure finds an appropriate compiler for the initial bootstrap.
467 1.1 mrg When <samp><span class="env">CC</span></samp> is used, the definition should contain the options that are
468 1.1 mrg needed whenever <samp><span class="env">CC</span></samp> is used.
469 1.1 mrg
470 1.1 mrg <p>Specifically, options that determine the runtime architecture must be
471 1.1 mrg in <samp><span class="env">CC</span></samp> to correctly select the target for the build. It is also
472 1.1 mrg convenient to place many other compiler options in <samp><span class="env">CC</span></samp>. For example,
473 1.1 mrg <samp><span class="env">CC="cc -Ac +DA2.0W -Wp,-H16376 -D_CLASSIC_TYPES -D_HPUX_SOURCE"</span></samp>
474 1.1 mrg can be used to bootstrap the GCC 3.3 branch with the HP compiler in
475 1.1 mrg 64-bit K&R/bundled mode. The <samp><span class="option">+DA2.0W</span></samp> option will result in
476 1.1 mrg the automatic selection of the ‘<samp><span class="samp">hppa64-hp-hpux11*</span></samp>’ target. The
477 1.1 mrg macro definition table of cpp needs to be increased for a successful
478 1.1 mrg build with the HP compiler. _CLASSIC_TYPES and _HPUX_SOURCE need to
479 1.1 mrg be defined when building with the bundled compiler, or when using the
480 1.1 mrg <samp><span class="option">-Ac</span></samp> option. These defines aren't necessary with <samp><span class="option">-Ae</span></samp>.
481 1.1 mrg
482 1.1 mrg <p>It is best to explicitly configure the ‘<samp><span class="samp">hppa64-hp-hpux11*</span></samp>’ target
483 1.1 mrg with the <samp><span class="option">--with-ld=...</span></samp> option. This overrides the standard
484 1.1 mrg search for ld. The two linkers supported on this target require different
485 1.1 mrg commands. The default linker is determined during configuration. As a
486 1.1 mrg result, it's not possible to switch linkers in the middle of a GCC build.
487 1.1 mrg This has been reported to sometimes occur in unified builds of binutils
488 1.1 mrg and GCC.
489 1.1 mrg
490 1.1 mrg <p>A recent linker patch must be installed for the correct operation of
491 1.1 mrg GCC 3.3 and later. <code>PHSS_26559</code> and <code>PHSS_24304</code> are the
492 1.1 mrg oldest linker patches that are known to work. They are for HP-UX
493 1.1 mrg 11.00 and 11.11, respectively. <code>PHSS_24303</code>, the companion to
494 1.1 mrg <code>PHSS_24304</code>, might be usable but it hasn't been tested. These
495 1.1 mrg patches have been superseded. Consult the HP patch database to obtain
496 1.1 mrg the currently recommended linker patch for your system.
497 1.1 mrg
498 1.1 mrg <p>The patches are necessary for the support of weak symbols on the
499 1.1 mrg 32-bit port, and for the running of initializers and finalizers. Weak
500 1.1 mrg symbols are implemented using SOM secondary definition symbols. Prior
501 1.1 mrg to HP-UX 11, there are bugs in the linker support for secondary symbols.
502 1.1 mrg The patches correct a problem of linker core dumps creating shared
503 1.1 mrg libraries containing secondary symbols, as well as various other
504 1.1 mrg linking issues involving secondary symbols.
505 1.1 mrg
506 1.1 mrg <p>GCC 3.3 uses the ELF DT_INIT_ARRAY and DT_FINI_ARRAY capabilities to
507 1.1 mrg run initializers and finalizers on the 64-bit port. The 32-bit port
508 1.1 mrg uses the linker <samp><span class="option">+init</span></samp> and <samp><span class="option">+fini</span></samp> options for the same
509 1.1 mrg purpose. The patches correct various problems with the +init/+fini
510 1.1 mrg options, including program core dumps. Binutils 2.14 corrects a
511 1.1 mrg problem on the 64-bit port resulting from HP's non-standard use of
512 1.1 mrg the .init and .fini sections for array initializers and finalizers.
513 1.1 mrg
514 1.1 mrg <p>Although the HP and GNU linkers are both supported for the
515 1.1 mrg ‘<samp><span class="samp">hppa64-hp-hpux11*</span></samp>’ target, it is strongly recommended that the
516 1.1 mrg HP linker be used for link editing on this target.
517 1.1 mrg
518 1.1 mrg <p>At this time, the GNU linker does not support the creation of long
519 1.1 mrg branch stubs. As a result, it can't successfully link binaries
520 1.1 mrg containing branch offsets larger than 8 megabytes. In addition,
521 1.1 mrg there are problems linking shared libraries, linking executables
522 1.1 mrg with <samp><span class="option">-static</span></samp>, and with dwarf2 unwind and exception support.
523 1.1 mrg It also doesn't provide stubs for internal calls to global functions
524 1.1 mrg in shared libraries, so these calls can't be overloaded.
525 1.1 mrg
526 1.1 mrg <p>The HP dynamic loader does not support GNU symbol versioning, so symbol
527 1.1 mrg versioning is not supported. It may be necessary to disable symbol
528 1.1 mrg versioning with <samp><span class="option">--disable-symvers</span></samp> when using GNU ld.
529 1.1 mrg
530 1.1 mrg <p>POSIX threads are the default. The optional DCE thread library is not
531 1.1 mrg supported, so <samp><span class="option">--enable-threads=dce</span></samp> does not work.
532 1.1 mrg
533 1.5 mrg <p><hr /><a name="x_002dx_002dlinux_002dgnu"></a>
534 1.1 mrg
535 1.5 mrg <h3 class="heading"><a name="TOC18"></a>*-*-linux-gnu</h3>
536 1.1 mrg
537 1.1 mrg <p>Versions of libstdc++-v3 starting with 3.2.1 require bug fixes present
538 1.1 mrg in glibc 2.2.5 and later. More information is available in the
539 1.1 mrg libstdc++-v3 documentation.
540 1.1 mrg
541 1.5 mrg <p><hr /><a name="ix86_002dx_002dlinux"></a>
542 1.1 mrg
543 1.5 mrg <h3 class="heading"><a name="TOC19"></a>i?86-*-linux*</h3>
544 1.1 mrg
545 1.1 mrg <p>As of GCC 3.3, binutils 2.13.1 or later is required for this platform.
546 1.1 mrg See <a href="http://gcc.gnu.org/PR10877">bug 10877</a> for more information.
547 1.1 mrg
548 1.1 mrg <p>If you receive Signal 11 errors when building on GNU/Linux, then it is
549 1.1 mrg possible you have a hardware problem. Further information on this can be
550 1.1 mrg found on <a href="http://www.bitwizard.nl/sig11/">www.bitwizard.nl</a>.
551 1.1 mrg
552 1.5 mrg <p><hr /><a name="ix86_002dx_002dsolaris210"></a>
553 1.1 mrg
554 1.5 mrg <h3 class="heading"><a name="TOC20"></a>i?86-*-solaris2.10</h3>
555 1.1 mrg
556 1.3 mrg <p>Use this for Solaris 10 or later on x86 and x86-64 systems. Starting
557 1.3 mrg with GCC 4.7, there is also a 64-bit ‘<samp><span class="samp">amd64-*-solaris2.1[0-9]*</span></samp>’ or
558 1.3 mrg ‘<samp><span class="samp">x86_64-*-solaris2.1[0-9]*</span></samp>’ configuration that corresponds to
559 1.3 mrg ‘<samp><span class="samp">sparcv9-sun-solaris2*</span></samp>’.
560 1.1 mrg
561 1.1 mrg <p>It is recommended that you configure GCC to use the GNU assembler, in
562 1.1 mrg <samp><span class="file">/usr/sfw/bin/gas</span></samp>. The versions included in Solaris 10, from GNU
563 1.1 mrg binutils 2.15, and Solaris 11, from GNU binutils 2.19, work fine,
564 1.1 mrg although the current version, from GNU binutils
565 1.3 mrg 2.22, is known to work, too. Recent versions of the Sun assembler in
566 1.1 mrg <samp><span class="file">/usr/ccs/bin/as</span></samp> work almost as well, though.
567 1.1 mrg <!-- FIXME: as patch requirements? -->
568 1.1 mrg
569 1.1 mrg <p>For linking, the Sun linker, is preferred. If you want to use the GNU
570 1.1 mrg linker instead, which is available in <samp><span class="file">/usr/sfw/bin/gld</span></samp>, note that
571 1.1 mrg due to a packaging bug the version in Solaris 10, from GNU binutils
572 1.1 mrg 2.15, cannot be used, while the version in Solaris 11, from GNU binutils
573 1.3 mrg 2.19, works, as does the latest version, from GNU binutils 2.22.
574 1.1 mrg
575 1.1 mrg <p>To use GNU <samp><span class="command">as</span></samp>, configure with the options
576 1.1 mrg <samp><span class="option">--with-gnu-as --with-as=/usr/sfw/bin/gas</span></samp>. It may be necessary
577 1.1 mrg to configure with <samp><span class="option">--without-gnu-ld --with-ld=/usr/ccs/bin/ld</span></samp> to
578 1.1 mrg guarantee use of Sun <samp><span class="command">ld</span></samp>.
579 1.1 mrg <!-- FIXME: why -without-gnu-ld -with-ld? -->
580 1.1 mrg
581 1.5 mrg <p><hr /><a name="ia64_002dx_002dlinux"></a>
582 1.1 mrg
583 1.5 mrg <h3 class="heading"><a name="TOC21"></a>ia64-*-linux</h3>
584 1.1 mrg
585 1.1 mrg <p>IA-64 processor (also known as IPF, or Itanium Processor Family)
586 1.1 mrg running GNU/Linux.
587 1.1 mrg
588 1.1 mrg <p>If you are using the installed system libunwind library with
589 1.1 mrg <samp><span class="option">--with-system-libunwind</span></samp>, then you must use libunwind 0.98 or
590 1.1 mrg later.
591 1.1 mrg
592 1.1 mrg <p>None of the following versions of GCC has an ABI that is compatible
593 1.1 mrg with any of the other versions in this list, with the exception that
594 1.1 mrg Red Hat 2.96 and Trillian 000171 are compatible with each other:
595 1.1 mrg 3.1, 3.0.2, 3.0.1, 3.0, Red Hat 2.96, and Trillian 000717.
596 1.1 mrg This primarily affects C++ programs and programs that create shared libraries.
597 1.1 mrg GCC 3.1 or later is recommended for compiling linux, the kernel.
598 1.1 mrg As of version 3.1 GCC is believed to be fully ABI compliant, and hence no
599 1.1 mrg more major ABI changes are expected.
600 1.1 mrg
601 1.5 mrg <p><hr /><a name="ia64_002dx_002dhpux"></a>
602 1.1 mrg
603 1.5 mrg <h3 class="heading"><a name="TOC22"></a>ia64-*-hpux*</h3>
604 1.1 mrg
605 1.1 mrg <p>Building GCC on this target requires the GNU Assembler. The bundled HP
606 1.1 mrg assembler will not work. To prevent GCC from using the wrong assembler,
607 1.1 mrg the option <samp><span class="option">--with-gnu-as</span></samp> may be necessary.
608 1.1 mrg
609 1.1 mrg <p>The GCC libunwind library has not been ported to HPUX. This means that for
610 1.1 mrg GCC versions 3.2.3 and earlier, <samp><span class="option">--enable-libunwind-exceptions</span></samp>
611 1.1 mrg is required to build GCC. For GCC 3.3 and later, this is the default.
612 1.1 mrg For gcc 3.4.3 and later, <samp><span class="option">--enable-libunwind-exceptions</span></samp> is
613 1.1 mrg removed and the system libunwind library will always be used.
614 1.1 mrg
615 1.1 mrg <p><hr />
616 1.5 mrg <!-- rs6000-ibm-aix*, powerpc-ibm-aix* --><a name="x_002dibm_002daix"></a>
617 1.1 mrg
618 1.5 mrg <h3 class="heading"><a name="TOC23"></a>*-ibm-aix*</h3>
619 1.1 mrg
620 1.1 mrg <p>Support for AIX version 3 and older was discontinued in GCC 3.4.
621 1.1 mrg Support for AIX version 4.2 and older was discontinued in GCC 4.5.
622 1.1 mrg
623 1.1 mrg <p>“out of memory” bootstrap failures may indicate a problem with
624 1.1 mrg process resource limits (ulimit). Hard limits are configured in the
625 1.1 mrg <samp><span class="file">/etc/security/limits</span></samp> system configuration file.
626 1.1 mrg
627 1.1 mrg <p>GCC can bootstrap with recent versions of IBM XLC, but bootstrapping
628 1.1 mrg with an earlier release of GCC is recommended. Bootstrapping with XLC
629 1.1 mrg requires a larger data segment, which can be enabled through the
630 1.1 mrg <var>LDR_CNTRL</var> environment variable, e.g.,
631 1.1 mrg
632 1.3 mrg <pre class="smallexample"> % LDR_CNTRL=MAXDATA=0x50000000
633 1.3 mrg % export LDR_CNTRL
634 1.1 mrg </pre>
635 1.1 mrg <p>One can start with a pre-compiled version of GCC to build from
636 1.1 mrg sources. One may delete GCC's “fixed” header files when starting
637 1.1 mrg with a version of GCC built for an earlier release of AIX.
638 1.1 mrg
639 1.1 mrg <p>To speed up the configuration phases of bootstrapping and installing GCC,
640 1.1 mrg one may use GNU Bash instead of AIX <samp><span class="command">/bin/sh</span></samp>, e.g.,
641 1.1 mrg
642 1.3 mrg <pre class="smallexample"> % CONFIG_SHELL=/opt/freeware/bin/bash
643 1.3 mrg % export CONFIG_SHELL
644 1.1 mrg </pre>
645 1.1 mrg <p>and then proceed as described in <a href="build.html">the build instructions</a>, where we strongly recommend specifying an absolute path
646 1.1 mrg to invoke <var>srcdir</var>/configure.
647 1.1 mrg
648 1.1 mrg <p>Because GCC on AIX is built as a 32-bit executable by default,
649 1.1 mrg (although it can generate 64-bit programs) the GMP and MPFR libraries
650 1.1 mrg required by gfortran must be 32-bit libraries. Building GMP and MPFR
651 1.1 mrg as static archive libraries works better than shared libraries.
652 1.1 mrg
653 1.1 mrg <p>Errors involving <code>alloca</code> when building GCC generally are due
654 1.1 mrg to an incorrect definition of <code>CC</code> in the Makefile or mixing files
655 1.1 mrg compiled with the native C compiler and GCC. During the stage1 phase of
656 1.1 mrg the build, the native AIX compiler <strong>must</strong> be invoked as <samp><span class="command">cc</span></samp>
657 1.1 mrg (not <samp><span class="command">xlc</span></samp>). Once <samp><span class="command">configure</span></samp> has been informed of
658 1.1 mrg <samp><span class="command">xlc</span></samp>, one needs to use ‘<samp><span class="samp">make distclean</span></samp>’ to remove the
659 1.1 mrg configure cache files and ensure that <samp><span class="env">CC</span></samp> environment variable
660 1.1 mrg does not provide a definition that will confuse <samp><span class="command">configure</span></samp>.
661 1.1 mrg If this error occurs during stage2 or later, then the problem most likely
662 1.1 mrg is the version of Make (see above).
663 1.1 mrg
664 1.3 mrg <p>The native <samp><span class="command">as</span></samp> and <samp><span class="command">ld</span></samp> are recommended for
665 1.3 mrg bootstrapping on AIX. The GNU Assembler, GNU Linker, and GNU
666 1.3 mrg Binutils version 2.20 is the minimum level that supports bootstrap on
667 1.3 mrg AIX 5. The GNU Assembler has not been updated to support AIX 6 or
668 1.3 mrg AIX 7. The native AIX tools do interoperate with GCC.
669 1.3 mrg
670 1.3 mrg <p>AIX 5.3 TL10, AIX 6.1 TL05 and AIX 7.1 TL00 introduced an AIX
671 1.3 mrg assembler change that sometimes produces corrupt assembly files
672 1.3 mrg causing AIX linker errors. The bug breaks GCC bootstrap on AIX and
673 1.3 mrg can cause compilation failures with existing GCC installations. An
674 1.3 mrg AIX iFix for AIX 5.3 is available (APAR IZ98385 for AIX 5.3 TL10, APAR
675 1.3 mrg IZ98477 for AIX 5.3 TL11 and IZ98134 for AIX 5.3 TL12). AIX 5.3 TL11 SP8,
676 1.3 mrg AIX 5.3 TL12 SP5, AIX 6.1 TL04 SP11, AIX 6.1 TL05 SP7, AIX 6.1 TL06 SP6,
677 1.3 mrg AIX 6.1 TL07 and AIX 7.1 TL01 should include the fix.
678 1.1 mrg
679 1.1 mrg <p>Building <samp><span class="file">libstdc++.a</span></samp> requires a fix for an AIX Assembler bug
680 1.1 mrg APAR IY26685 (AIX 4.3) or APAR IY25528 (AIX 5.1). It also requires a
681 1.1 mrg fix for another AIX Assembler bug and a co-dependent AIX Archiver fix
682 1.1 mrg referenced as APAR IY53606 (AIX 5.2) or as APAR IY54774 (AIX 5.1)
683 1.1 mrg
684 1.5 mrg <p><a name="TransferAixShobj"></a>‘<samp><span class="samp">libstdc++</span></samp>’ in GCC 3.4 increments the major version number of the
685 1.1 mrg shared object and GCC installation places the <samp><span class="file">libstdc++.a</span></samp>
686 1.1 mrg shared library in a common location which will overwrite the and GCC
687 1.1 mrg 3.3 version of the shared library. Applications either need to be
688 1.1 mrg re-linked against the new shared library or the GCC 3.1 and GCC 3.3
689 1.1 mrg versions of the ‘<samp><span class="samp">libstdc++</span></samp>’ shared object needs to be available
690 1.1 mrg to the AIX runtime loader. The GCC 3.1 ‘<samp><span class="samp">libstdc++.so.4</span></samp>’, if
691 1.1 mrg present, and GCC 3.3 ‘<samp><span class="samp">libstdc++.so.5</span></samp>’ shared objects can be
692 1.1 mrg installed for runtime dynamic loading using the following steps to set
693 1.1 mrg the ‘<samp><span class="samp">F_LOADONLY</span></samp>’ flag in the shared object for <em>each</em>
694 1.1 mrg multilib <samp><span class="file">libstdc++.a</span></samp> installed:
695 1.1 mrg
696 1.1 mrg <p>Extract the shared objects from the currently installed
697 1.1 mrg <samp><span class="file">libstdc++.a</span></samp> archive:
698 1.3 mrg <pre class="smallexample"> % ar -x libstdc++.a libstdc++.so.4 libstdc++.so.5
699 1.1 mrg </pre>
700 1.1 mrg <p>Enable the ‘<samp><span class="samp">F_LOADONLY</span></samp>’ flag so that the shared object will be
701 1.1 mrg available for runtime dynamic loading, but not linking:
702 1.3 mrg <pre class="smallexample"> % strip -e libstdc++.so.4 libstdc++.so.5
703 1.1 mrg </pre>
704 1.1 mrg <p>Archive the runtime-only shared object in the GCC 3.4
705 1.1 mrg <samp><span class="file">libstdc++.a</span></samp> archive:
706 1.3 mrg <pre class="smallexample"> % ar -q libstdc++.a libstdc++.so.4 libstdc++.so.5
707 1.1 mrg </pre>
708 1.5 mrg <p>Eventually, the
709 1.5 mrg <a href="./configure.html#WithAixSoname"><samp><span class="option">--with-aix-soname=svr4</span></samp></a>
710 1.5 mrg configure option may drop the need for this procedure for libraries that
711 1.5 mrg support it.
712 1.5 mrg
713 1.1 mrg <p>Linking executables and shared libraries may produce warnings of
714 1.1 mrg duplicate symbols. The assembly files generated by GCC for AIX always
715 1.1 mrg have included multiple symbol definitions for certain global variable
716 1.1 mrg and function declarations in the original program. The warnings should
717 1.1 mrg not prevent the linker from producing a correct library or runnable
718 1.1 mrg executable.
719 1.1 mrg
720 1.1 mrg <p>AIX 4.3 utilizes a “large format” archive to support both 32-bit and
721 1.1 mrg 64-bit object modules. The routines provided in AIX 4.3.0 and AIX 4.3.1
722 1.1 mrg to parse archive libraries did not handle the new format correctly.
723 1.1 mrg These routines are used by GCC and result in error messages during
724 1.1 mrg linking such as “not a COFF file”. The version of the routines shipped
725 1.1 mrg with AIX 4.3.1 should work for a 32-bit environment. The <samp><span class="option">-g</span></samp>
726 1.1 mrg option of the archive command may be used to create archives of 32-bit
727 1.1 mrg objects using the original “small format”. A correct version of the
728 1.1 mrg routines is shipped with AIX 4.3.2 and above.
729 1.1 mrg
730 1.1 mrg <p>Some versions of the AIX binder (linker) can fail with a relocation
731 1.1 mrg overflow severe error when the <samp><span class="option">-bbigtoc</span></samp> option is used to link
732 1.1 mrg GCC-produced object files into an executable that overflows the TOC. A fix
733 1.1 mrg for APAR IX75823 (OVERFLOW DURING LINK WHEN USING GCC AND -BBIGTOC) is
734 1.1 mrg available from IBM Customer Support and from its
735 1.1 mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
736 1.1 mrg website as PTF U455193.
737 1.1 mrg
738 1.1 mrg <p>The AIX 4.3.2.1 linker (bos.rte.bind_cmds Level 4.3.2.1) will dump core
739 1.1 mrg with a segmentation fault when invoked by any version of GCC. A fix for
740 1.1 mrg APAR IX87327 is available from IBM Customer Support and from its
741 1.1 mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
742 1.1 mrg website as PTF U461879. This fix is incorporated in AIX 4.3.3 and above.
743 1.1 mrg
744 1.1 mrg <p>The initial assembler shipped with AIX 4.3.0 generates incorrect object
745 1.1 mrg files. A fix for APAR IX74254 (64BIT DISASSEMBLED OUTPUT FROM COMPILER FAILS
746 1.1 mrg TO ASSEMBLE/BIND) is available from IBM Customer Support and from its
747 1.1 mrg <a href="http://techsupport.services.ibm.com/">techsupport.services.ibm.com</a>
748 1.1 mrg website as PTF U453956. This fix is incorporated in AIX 4.3.1 and above.
749 1.1 mrg
750 1.1 mrg <p>AIX provides National Language Support (NLS). Compilers and assemblers
751 1.1 mrg use NLS to support locale-specific representations of various data
752 1.1 mrg formats including floating-point numbers (e.g., ‘<samp><span class="samp">.</span></samp>’ vs ‘<samp><span class="samp">,</span></samp>’ for
753 1.1 mrg separating decimal fractions). There have been problems reported where
754 1.1 mrg GCC does not produce the same floating-point formats that the assembler
755 1.1 mrg expects. If one encounters this problem, set the <samp><span class="env">LANG</span></samp>
756 1.1 mrg environment variable to ‘<samp><span class="samp">C</span></samp>’ or ‘<samp><span class="samp">En_US</span></samp>’.
757 1.1 mrg
758 1.1 mrg <p>A default can be specified with the <samp><span class="option">-mcpu=</span><var>cpu_type</var></samp>
759 1.1 mrg switch and using the configure option <samp><span class="option">--with-cpu-</span><var>cpu_type</var></samp>.
760 1.1 mrg
761 1.5 mrg <p><hr /><a name="iq2000_002dx_002delf"></a>
762 1.1 mrg
763 1.5 mrg <h3 class="heading"><a name="TOC24"></a>iq2000-*-elf</h3>
764 1.1 mrg
765 1.1 mrg <p>Vitesse IQ2000 processors. These are used in embedded
766 1.1 mrg applications. There are no standard Unix configurations.
767 1.1 mrg
768 1.5 mrg <p><hr /><a name="lm32_002dx_002delf"></a>
769 1.1 mrg
770 1.5 mrg <h3 class="heading"><a name="TOC25"></a>lm32-*-elf</h3>
771 1.1 mrg
772 1.1 mrg <p>Lattice Mico32 processor.
773 1.1 mrg This configuration is intended for embedded systems.
774 1.1 mrg
775 1.5 mrg <p><hr /><a name="lm32_002dx_002duclinux"></a>
776 1.1 mrg
777 1.5 mrg <h3 class="heading"><a name="TOC26"></a>lm32-*-uclinux</h3>
778 1.1 mrg
779 1.1 mrg <p>Lattice Mico32 processor.
780 1.1 mrg This configuration is intended for embedded systems running uClinux.
781 1.1 mrg
782 1.5 mrg <p><hr /><a name="m32c_002dx_002delf"></a>
783 1.1 mrg
784 1.5 mrg <h3 class="heading"><a name="TOC27"></a>m32c-*-elf</h3>
785 1.1 mrg
786 1.1 mrg <p>Renesas M32C processor.
787 1.1 mrg This configuration is intended for embedded systems.
788 1.1 mrg
789 1.5 mrg <p><hr /><a name="m32r_002dx_002delf"></a>
790 1.1 mrg
791 1.5 mrg <h3 class="heading"><a name="TOC28"></a>m32r-*-elf</h3>
792 1.1 mrg
793 1.1 mrg <p>Renesas M32R processor.
794 1.1 mrg This configuration is intended for embedded systems.
795 1.1 mrg
796 1.5 mrg <p><hr /><a name="m68k_002dx_002dx"></a>
797 1.1 mrg
798 1.5 mrg <h3 class="heading"><a name="TOC29"></a>m68k-*-*</h3>
799 1.1 mrg
800 1.1 mrg <p>By default,
801 1.1 mrg ‘<samp><span class="samp">m68k-*-elf*</span></samp>’, ‘<samp><span class="samp">m68k-*-rtems</span></samp>’, ‘<samp><span class="samp">m68k-*-uclinux</span></samp>’ and
802 1.1 mrg ‘<samp><span class="samp">m68k-*-linux</span></samp>’
803 1.1 mrg build libraries for both M680x0 and ColdFire processors. If you only
804 1.1 mrg need the M680x0 libraries, you can omit the ColdFire ones by passing
805 1.1 mrg <samp><span class="option">--with-arch=m68k</span></samp> to <samp><span class="command">configure</span></samp>. Alternatively, you
806 1.1 mrg can omit the M680x0 libraries by passing <samp><span class="option">--with-arch=cf</span></samp> to
807 1.1 mrg <samp><span class="command">configure</span></samp>. These targets default to 5206 or 5475 code as
808 1.1 mrg appropriate for the target system when
809 1.1 mrg configured with <samp><span class="option">--with-arch=cf</span></samp> and 68020 code otherwise.
810 1.1 mrg
811 1.1 mrg <p>The ‘<samp><span class="samp">m68k-*-netbsd</span></samp>’ and
812 1.1 mrg ‘<samp><span class="samp">m68k-*-openbsd</span></samp>’ targets also support the <samp><span class="option">--with-arch</span></samp>
813 1.1 mrg option. They will generate ColdFire CFV4e code when configured with
814 1.1 mrg <samp><span class="option">--with-arch=cf</span></samp> and 68020 code otherwise.
815 1.1 mrg
816 1.1 mrg <p>You can override the default processors listed above by configuring
817 1.1 mrg with <samp><span class="option">--with-cpu=</span><var>target</var></samp>. This <var>target</var> can either
818 1.1 mrg be a <samp><span class="option">-mcpu</span></samp> argument or one of the following values:
819 1.1 mrg ‘<samp><span class="samp">m68000</span></samp>’, ‘<samp><span class="samp">m68010</span></samp>’, ‘<samp><span class="samp">m68020</span></samp>’, ‘<samp><span class="samp">m68030</span></samp>’,
820 1.1 mrg ‘<samp><span class="samp">m68040</span></samp>’, ‘<samp><span class="samp">m68060</span></samp>’, ‘<samp><span class="samp">m68020-40</span></samp>’ and ‘<samp><span class="samp">m68020-60</span></samp>’.
821 1.1 mrg
822 1.3 mrg <p>GCC requires at least binutils version 2.17 on these targets.
823 1.3 mrg
824 1.5 mrg <p><hr /><a name="m68k_002dx_002duclinux"></a>
825 1.1 mrg
826 1.5 mrg <h3 class="heading"><a name="TOC30"></a>m68k-*-uclinux</h3>
827 1.1 mrg
828 1.1 mrg <p>GCC 4.3 changed the uClinux configuration so that it uses the
829 1.1 mrg ‘<samp><span class="samp">m68k-linux-gnu</span></samp>’ ABI rather than the ‘<samp><span class="samp">m68k-elf</span></samp>’ ABI.
830 1.1 mrg It also added improved support for C++ and flat shared libraries,
831 1.3 mrg both of which were ABI changes.
832 1.1 mrg
833 1.5 mrg <p><hr /><a name="mep_002dx_002delf"></a>
834 1.1 mrg
835 1.5 mrg <h3 class="heading"><a name="TOC31"></a>mep-*-elf</h3>
836 1.1 mrg
837 1.1 mrg <p>Toshiba Media embedded Processor.
838 1.1 mrg This configuration is intended for embedded systems.
839 1.1 mrg
840 1.5 mrg <p><hr /><a name="microblaze_002dx_002delf"></a>
841 1.1 mrg
842 1.5 mrg <h3 class="heading"><a name="TOC32"></a>microblaze-*-elf</h3>
843 1.3 mrg
844 1.3 mrg <p>Xilinx MicroBlaze processor.
845 1.3 mrg This configuration is intended for embedded systems.
846 1.3 mrg
847 1.5 mrg <p><hr /><a name="mips_002dx_002dx"></a>
848 1.3 mrg
849 1.5 mrg <h3 class="heading"><a name="TOC33"></a>mips-*-*</h3>
850 1.1 mrg
851 1.1 mrg <p>If on a MIPS system you get an error message saying “does not have gp
852 1.1 mrg sections for all it's [sic] sectons [sic]”, don't worry about it. This
853 1.1 mrg happens whenever you use GAS with the MIPS linker, but there is not
854 1.1 mrg really anything wrong, and it is okay to use the output file. You can
855 1.1 mrg stop such warnings by installing the GNU linker.
856 1.1 mrg
857 1.1 mrg <p>It would be nice to extend GAS to produce the gp tables, but they are
858 1.1 mrg optional, and there should not be a warning about their absence.
859 1.1 mrg
860 1.1 mrg <p>The libstdc++ atomic locking routines for MIPS targets requires MIPS II
861 1.1 mrg and later. A patch went in just after the GCC 3.3 release to
862 1.1 mrg make ‘<samp><span class="samp">mips*-*-*</span></samp>’ use the generic implementation instead. You can also
863 1.1 mrg configure for ‘<samp><span class="samp">mipsel-elf</span></samp>’ as a workaround. The
864 1.1 mrg ‘<samp><span class="samp">mips*-*-linux*</span></samp>’ target continues to use the MIPS II routines. More
865 1.1 mrg work on this is expected in future releases.
866 1.1 mrg
867 1.1 mrg <!-- If you make -with-llsc the default for another target, please also -->
868 1.1 mrg <!-- update the description of the -with-llsc option. -->
869 1.1 mrg <p>The built-in <code>__sync_*</code> functions are available on MIPS II and
870 1.1 mrg later systems and others that support the ‘<samp><span class="samp">ll</span></samp>’, ‘<samp><span class="samp">sc</span></samp>’ and
871 1.1 mrg ‘<samp><span class="samp">sync</span></samp>’ instructions. This can be overridden by passing
872 1.1 mrg <samp><span class="option">--with-llsc</span></samp> or <samp><span class="option">--without-llsc</span></samp> when configuring GCC.
873 1.1 mrg Since the Linux kernel emulates these instructions if they are
874 1.1 mrg missing, the default for ‘<samp><span class="samp">mips*-*-linux*</span></samp>’ targets is
875 1.1 mrg <samp><span class="option">--with-llsc</span></samp>. The <samp><span class="option">--with-llsc</span></samp> and
876 1.1 mrg <samp><span class="option">--without-llsc</span></samp> configure options may be overridden at compile
877 1.1 mrg time by passing the <samp><span class="option">-mllsc</span></samp> or <samp><span class="option">-mno-llsc</span></samp> options to
878 1.1 mrg the compiler.
879 1.1 mrg
880 1.1 mrg <p>MIPS systems check for division by zero (unless
881 1.1 mrg <samp><span class="option">-mno-check-zero-division</span></samp> is passed to the compiler) by
882 1.1 mrg generating either a conditional trap or a break instruction. Using
883 1.1 mrg trap results in smaller code, but is only supported on MIPS II and
884 1.1 mrg later. Also, some versions of the Linux kernel have a bug that
885 1.1 mrg prevents trap from generating the proper signal (<code>SIGFPE</code>). To enable
886 1.1 mrg the use of break, use the <samp><span class="option">--with-divide=breaks</span></samp>
887 1.1 mrg <samp><span class="command">configure</span></samp> option when configuring GCC. The default is to
888 1.1 mrg use traps on systems that support them.
889 1.1 mrg
890 1.1 mrg <p>The assembler from GNU binutils 2.17 and earlier has a bug in the way
891 1.1 mrg it sorts relocations for REL targets (o32, o64, EABI). This can cause
892 1.1 mrg bad code to be generated for simple C++ programs. Also the linker
893 1.1 mrg from GNU binutils versions prior to 2.17 has a bug which causes the
894 1.1 mrg runtime linker stubs in very large programs, like <samp><span class="file">libgcj.so</span></samp>, to
895 1.1 mrg be incorrectly generated. GNU Binutils 2.18 and later (and snapshots
896 1.1 mrg made after Nov. 9, 2006) should be free from both of these problems.
897 1.1 mrg
898 1.5 mrg <p><hr /><a name="mips_002dsgi_002dirix5"></a>
899 1.1 mrg
900 1.5 mrg <h3 class="heading"><a name="TOC34"></a>mips-sgi-irix5</h3>
901 1.1 mrg
902 1.3 mrg <p>Support for IRIX 5 has been removed in GCC 4.6.
903 1.1 mrg
904 1.5 mrg <p><hr /><a name="mips_002dsgi_002dirix6"></a>
905 1.1 mrg
906 1.5 mrg <h3 class="heading"><a name="TOC35"></a>mips-sgi-irix6</h3>
907 1.1 mrg
908 1.3 mrg <p>Support for IRIX 6.5 has been removed in GCC 4.8. Support for IRIX 6
909 1.3 mrg releases before 6.5 has been removed in GCC 4.6, as well as support for
910 1.3 mrg the O32 ABI.
911 1.1 mrg
912 1.5 mrg <p><hr /><a name="moxie_002dx_002delf"></a>
913 1.1 mrg
914 1.5 mrg <h3 class="heading"><a name="TOC36"></a>moxie-*-elf</h3>
915 1.1 mrg
916 1.3 mrg <p>The moxie processor.
917 1.1 mrg
918 1.5 mrg <p><hr /><a name="msp430_002dx_002delf"></a>
919 1.5 mrg
920 1.5 mrg <h3 class="heading"><a name="TOC37"></a>msp430-*-elf</h3>
921 1.5 mrg
922 1.5 mrg <p>TI MSP430 processor.
923 1.5 mrg This configuration is intended for embedded systems.
924 1.5 mrg
925 1.5 mrg <p><hr /><a name="nds32le_002dx_002delf"></a>
926 1.5 mrg
927 1.5 mrg <h3 class="heading"><a name="TOC38"></a>nds32le-*-elf</h3>
928 1.5 mrg
929 1.5 mrg <p>Andes NDS32 target in little endian mode.
930 1.5 mrg
931 1.5 mrg <p><hr /><a name="nds32be_002dx_002delf"></a>
932 1.5 mrg
933 1.5 mrg <h3 class="heading"><a name="TOC39"></a>nds32be-*-elf</h3>
934 1.5 mrg
935 1.5 mrg <p>Andes NDS32 target in big endian mode.
936 1.5 mrg
937 1.5 mrg <p><hr /><a name="nvptx_002dx_002dnone"></a>
938 1.5 mrg
939 1.5 mrg <h3 class="heading"><a name="TOC40"></a>nvptx-*-none</h3>
940 1.5 mrg
941 1.5 mrg <p>Nvidia PTX target.
942 1.5 mrg
943 1.5 mrg <p>Instead of GNU binutils, you will need to install
944 1.5 mrg <a href="https://github.com/MentorEmbedded/nvptx-tools/">nvptx-tools</a>.
945 1.5 mrg Tell GCC where to find it:
946 1.5 mrg <samp><span class="option">--with-build-time-tools=[install-nvptx-tools]/nvptx-none/bin</span></samp>.
947 1.5 mrg
948 1.5 mrg <p>A nvptx port of newlib is available at
949 1.5 mrg <a href="https://github.com/MentorEmbedded/nvptx-newlib/">nvptx-newlib</a>.
950 1.5 mrg It can be automatically built together with GCC. For this, add a
951 1.5 mrg symbolic link to nvptx-newlib's <samp><span class="file">newlib</span></samp> directory to the
952 1.5 mrg directory containing the GCC sources.
953 1.5 mrg
954 1.5 mrg <p>Use the <samp><span class="option">--disable-sjlj-exceptions</span></samp> and
955 1.5 mrg <samp><span class="option">--enable-newlib-io-long-long</span></samp> options when configuring.
956 1.5 mrg
957 1.5 mrg <p><hr /><a name="powerpc_002dx_002dx"></a>
958 1.1 mrg
959 1.5 mrg <h3 class="heading"><a name="TOC41"></a>powerpc-*-*</h3>
960 1.1 mrg
961 1.1 mrg <p>You can specify a default version for the <samp><span class="option">-mcpu=</span><var>cpu_type</var></samp>
962 1.1 mrg switch by using the configure option <samp><span class="option">--with-cpu-</span><var>cpu_type</var></samp>.
963 1.1 mrg
964 1.1 mrg <p>You will need
965 1.1 mrg <a href="ftp://ftp.kernel.org/pub/linux/devel/binutils">binutils 2.15</a>
966 1.1 mrg or newer for a working GCC.
967 1.1 mrg
968 1.5 mrg <p><hr /><a name="powerpc_002dx_002ddarwin"></a>
969 1.1 mrg
970 1.5 mrg <h3 class="heading"><a name="TOC42"></a>powerpc-*-darwin*</h3>
971 1.1 mrg
972 1.1 mrg <p>PowerPC running Darwin (Mac OS X kernel).
973 1.1 mrg
974 1.1 mrg <p>Pre-installed versions of Mac OS X may not include any developer tools,
975 1.1 mrg meaning that you will not be able to build GCC from source. Tool
976 1.1 mrg binaries are available at
977 1.3 mrg <a href="http://opensource.apple.com/">http://opensource.apple.com/</a>.
978 1.1 mrg
979 1.1 mrg <p>This version of GCC requires at least cctools-590.36. The
980 1.1 mrg cctools-590.36 package referenced from
981 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
982 1.1 mrg on systems older than 10.3.9 (aka darwin7.9.0).
983 1.1 mrg
984 1.5 mrg <p><hr /><a name="powerpc_002dx_002delf"></a>
985 1.1 mrg
986 1.5 mrg <h3 class="heading"><a name="TOC43"></a>powerpc-*-elf</h3>
987 1.1 mrg
988 1.1 mrg <p>PowerPC system in big endian mode, running System V.4.
989 1.1 mrg
990 1.5 mrg <p><hr /><a name="powerpc_002dx_002dlinux_002dgnu"></a>
991 1.1 mrg
992 1.5 mrg <h3 class="heading"><a name="TOC44"></a>powerpc*-*-linux-gnu*</h3>
993 1.1 mrg
994 1.1 mrg <p>PowerPC system in big endian mode running Linux.
995 1.1 mrg
996 1.5 mrg <p><hr /><a name="powerpc_002dx_002dnetbsd"></a>
997 1.1 mrg
998 1.5 mrg <h3 class="heading"><a name="TOC45"></a>powerpc-*-netbsd*</h3>
999 1.1 mrg
1000 1.1 mrg <p>PowerPC system in big endian mode running NetBSD.
1001 1.1 mrg
1002 1.5 mrg <p><hr /><a name="powerpc_002dx_002deabisim"></a>
1003 1.1 mrg
1004 1.5 mrg <h3 class="heading"><a name="TOC46"></a>powerpc-*-eabisim</h3>
1005 1.1 mrg
1006 1.1 mrg <p>Embedded PowerPC system in big endian mode for use in running under the
1007 1.1 mrg PSIM simulator.
1008 1.1 mrg
1009 1.5 mrg <p><hr /><a name="powerpc_002dx_002deabi"></a>
1010 1.1 mrg
1011 1.5 mrg <h3 class="heading"><a name="TOC47"></a>powerpc-*-eabi</h3>
1012 1.1 mrg
1013 1.1 mrg <p>Embedded PowerPC system in big endian mode.
1014 1.1 mrg
1015 1.5 mrg <p><hr /><a name="powerpcle_002dx_002delf"></a>
1016 1.1 mrg
1017 1.5 mrg <h3 class="heading"><a name="TOC48"></a>powerpcle-*-elf</h3>
1018 1.1 mrg
1019 1.1 mrg <p>PowerPC system in little endian mode, running System V.4.
1020 1.1 mrg
1021 1.5 mrg <p><hr /><a name="powerpcle_002dx_002deabisim"></a>
1022 1.1 mrg
1023 1.5 mrg <h3 class="heading"><a name="TOC49"></a>powerpcle-*-eabisim</h3>
1024 1.1 mrg
1025 1.1 mrg <p>Embedded PowerPC system in little endian mode for use in running under
1026 1.1 mrg the PSIM simulator.
1027 1.1 mrg
1028 1.5 mrg <p><hr /><a name="powerpcle_002dx_002deabi"></a>
1029 1.1 mrg
1030 1.5 mrg <h3 class="heading"><a name="TOC50"></a>powerpcle-*-eabi</h3>
1031 1.1 mrg
1032 1.1 mrg <p>Embedded PowerPC system in little endian mode.
1033 1.1 mrg
1034 1.5 mrg <p><hr /><a name="rl78_002dx_002delf"></a>
1035 1.1 mrg
1036 1.5 mrg <h3 class="heading"><a name="TOC51"></a>rl78-*-elf</h3>
1037 1.3 mrg
1038 1.3 mrg <p>The Renesas RL78 processor.
1039 1.3 mrg This configuration is intended for embedded systems.
1040 1.3 mrg
1041 1.5 mrg <p><hr /><a name="rx_002dx_002delf"></a>
1042 1.3 mrg
1043 1.5 mrg <h3 class="heading"><a name="TOC52"></a>rx-*-elf</h3>
1044 1.1 mrg
1045 1.1 mrg <p>The Renesas RX processor. See
1046 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>
1047 1.1 mrg for more information about this processor.
1048 1.1 mrg
1049 1.5 mrg <p><hr /><a name="s390_002dx_002dlinux"></a>
1050 1.1 mrg
1051 1.5 mrg <h3 class="heading"><a name="TOC53"></a>s390-*-linux*</h3>
1052 1.1 mrg
1053 1.1 mrg <p>S/390 system running GNU/Linux for S/390.
1054 1.1 mrg
1055 1.5 mrg <p><hr /><a name="s390x_002dx_002dlinux"></a>
1056 1.1 mrg
1057 1.5 mrg <h3 class="heading"><a name="TOC54"></a>s390x-*-linux*</h3>
1058 1.1 mrg
1059 1.1 mrg <p>zSeries system (64-bit) running GNU/Linux for zSeries.
1060 1.1 mrg
1061 1.5 mrg <p><hr /><a name="s390x_002dibm_002dtpf"></a>
1062 1.1 mrg
1063 1.5 mrg <h3 class="heading"><a name="TOC55"></a>s390x-ibm-tpf*</h3>
1064 1.1 mrg
1065 1.1 mrg <p>zSeries system (64-bit) running TPF. This platform is
1066 1.1 mrg supported as cross-compilation target only.
1067 1.1 mrg
1068 1.1 mrg <p><hr /><!-- Please use Solaris 2 to refer to all release of Solaris, starting -->
1069 1.1 mrg <!-- with 2.0 until 2.6, 7, 8, etc. Solaris 1 was a marketing name for -->
1070 1.1 mrg <!-- SunOS 4 releases which we don't use to avoid confusion. Solaris -->
1071 1.1 mrg <!-- alone is too unspecific and must be avoided. -->
1072 1.5 mrg <a name="x_002dx_002dsolaris2"></a>
1073 1.1 mrg
1074 1.5 mrg <h3 class="heading"><a name="TOC56"></a>*-*-solaris2*</h3>
1075 1.3 mrg
1076 1.5 mrg <p>Support for Solaris 9 has been removed in GCC 4.10. Support for Solaris
1077 1.5 mrg 8 has been removed in GCC 4.8. Support for Solaris 7 has been removed
1078 1.5 mrg in GCC 4.6.
1079 1.1 mrg
1080 1.3 mrg <p>Sun does not ship a C compiler with Solaris 2 before Solaris 10, though
1081 1.3 mrg you can download the Sun Studio compilers for free. In Solaris 10 and
1082 1.3 mrg 11, GCC 3.4.3 is available as <samp><span class="command">/usr/sfw/bin/gcc</span></samp>. Solaris 11
1083 1.3 mrg also provides GCC 4.5.2 as <samp><span class="command">/usr/gcc/4.5/bin/gcc</span></samp>. Alternatively,
1084 1.1 mrg you can install a pre-built GCC to bootstrap and install GCC. See the
1085 1.1 mrg <a href="binaries.html">binaries page</a> for details.
1086 1.1 mrg
1087 1.1 mrg <p>The Solaris 2 <samp><span class="command">/bin/sh</span></samp> will often fail to configure
1088 1.1 mrg ‘<samp><span class="samp">libstdc++-v3</span></samp>’, ‘<samp><span class="samp">boehm-gc</span></samp>’ or ‘<samp><span class="samp">libjava</span></samp>’. We therefore
1089 1.1 mrg recommend using the following initial sequence of commands
1090 1.1 mrg
1091 1.3 mrg <pre class="smallexample"> % CONFIG_SHELL=/bin/ksh
1092 1.3 mrg % export CONFIG_SHELL
1093 1.1 mrg </pre>
1094 1.1 mrg <p class="noindent">and proceed as described in <a href="configure.html">the configure instructions</a>.
1095 1.1 mrg In addition we strongly recommend specifying an absolute path to invoke
1096 1.1 mrg <samp><var>srcdir</var><span class="command">/configure</span></samp>.
1097 1.1 mrg
1098 1.1 mrg <p>Solaris 2 comes with a number of optional OS packages. Some of these
1099 1.1 mrg are needed to use GCC fully, namely <code>SUNWarc</code>,
1100 1.1 mrg <code>SUNWbtool</code>, <code>SUNWesu</code>, <code>SUNWhea</code>, <code>SUNWlibm</code>,
1101 1.1 mrg <code>SUNWsprot</code>, and <code>SUNWtoo</code>. If you did not install all
1102 1.1 mrg optional packages when installing Solaris 2, you will need to verify that
1103 1.1 mrg the packages that GCC needs are installed.
1104 1.1 mrg
1105 1.1 mrg <p>To check whether an optional package is installed, use
1106 1.1 mrg the <samp><span class="command">pkginfo</span></samp> command. To add an optional package, use the
1107 1.1 mrg <samp><span class="command">pkgadd</span></samp> command. For further details, see the Solaris 2
1108 1.1 mrg documentation.
1109 1.1 mrg
1110 1.1 mrg <p>Trying to use the linker and other tools in
1111 1.1 mrg <samp><span class="file">/usr/ucb</span></samp> to install GCC has been observed to cause trouble.
1112 1.1 mrg For example, the linker may hang indefinitely. The fix is to remove
1113 1.1 mrg <samp><span class="file">/usr/ucb</span></samp> from your <samp><span class="env">PATH</span></samp>.
1114 1.1 mrg
1115 1.1 mrg <p>The build process works more smoothly with the legacy Sun tools so, if you
1116 1.1 mrg have <samp><span class="file">/usr/xpg4/bin</span></samp> in your <samp><span class="env">PATH</span></samp>, we recommend that you place
1117 1.1 mrg <samp><span class="file">/usr/bin</span></samp> before <samp><span class="file">/usr/xpg4/bin</span></samp> for the duration of the build.
1118 1.1 mrg
1119 1.1 mrg <p>We recommend the use of the Sun assembler or the GNU assembler, in
1120 1.1 mrg conjunction with the Sun linker. The GNU <samp><span class="command">as</span></samp>
1121 1.1 mrg versions included in Solaris 10, from GNU binutils 2.15, and Solaris 11,
1122 1.1 mrg from GNU binutils 2.19, are known to work. They can be found in
1123 1.3 mrg <samp><span class="file">/usr/sfw/bin/gas</span></samp>. Current versions of GNU binutils (2.22)
1124 1.1 mrg are known to work as well. Note that your mileage may vary
1125 1.1 mrg if you use a combination of the GNU tools and the Sun tools: while the
1126 1.1 mrg combination GNU <samp><span class="command">as</span></samp> + Sun <samp><span class="command">ld</span></samp> should reasonably work,
1127 1.3 mrg the reverse combination Sun <samp><span class="command">as</span></samp> + GNU <samp><span class="command">ld</span></samp> may fail to
1128 1.3 mrg build or cause memory corruption at runtime in some cases for C++ programs.
1129 1.1 mrg <!-- FIXME: still? -->
1130 1.1 mrg GNU <samp><span class="command">ld</span></samp> usually works as well, although the version included in
1131 1.1 mrg Solaris 10 cannot be used due to several bugs. Again, the current
1132 1.3 mrg version (2.22) is known to work, but generally lacks platform specific
1133 1.3 mrg features, so better stay with Sun <samp><span class="command">ld</span></samp>. To use the LTO linker
1134 1.3 mrg plugin (<samp><span class="option">-fuse-linker-plugin</span></samp>) with GNU <samp><span class="command">ld</span></samp>, GNU
1135 1.3 mrg binutils <em>must</em> be configured with <samp><span class="option">--enable-largefile</span></samp>.
1136 1.3 mrg
1137 1.3 mrg <p>To enable symbol versioning in ‘<samp><span class="samp">libstdc++</span></samp>’ with Sun <samp><span class="command">ld</span></samp>,
1138 1.3 mrg you need to have any version of GNU <samp><span class="command">c++filt</span></samp>, which is part of
1139 1.3 mrg GNU binutils. ‘<samp><span class="samp">libstdc++</span></samp>’ symbol versioning will be disabled if no
1140 1.3 mrg appropriate version is found. Sun <samp><span class="command">c++filt</span></samp> from the Sun Studio
1141 1.3 mrg compilers does <em>not</em> work.
1142 1.1 mrg
1143 1.1 mrg <p>Sun bug 4296832 turns up when compiling X11 headers with GCC 2.95 or
1144 1.1 mrg newer: <samp><span class="command">g++</span></samp> will complain that types are missing. These headers
1145 1.1 mrg assume that omitting the type means <code>int</code>; this assumption worked for
1146 1.1 mrg C90 but is wrong for C++, and is now wrong for C99 also.
1147 1.1 mrg
1148 1.1 mrg <p>Sun bug 4927647 sometimes causes random spurious testsuite failures
1149 1.1 mrg related to missing diagnostic output. This bug doesn't affect GCC
1150 1.1 mrg itself, rather it is a kernel bug triggered by the <samp><span class="command">expect</span></samp>
1151 1.1 mrg program which is used only by the GCC testsuite driver. When the bug
1152 1.1 mrg causes the <samp><span class="command">expect</span></samp> program to miss anticipated output, extra
1153 1.1 mrg testsuite failures appear.
1154 1.1 mrg
1155 1.5 mrg <p><hr /><a name="sparc_002dx_002dx"></a>
1156 1.3 mrg
1157 1.5 mrg <h3 class="heading"><a name="TOC57"></a>sparc*-*-*</h3>
1158 1.3 mrg
1159 1.3 mrg <p>This section contains general configuration information for all
1160 1.3 mrg SPARC-based platforms. In addition to reading this section, please
1161 1.3 mrg read all other sections that match your target.
1162 1.3 mrg
1163 1.3 mrg <p>Newer versions of the GNU Multiple Precision Library (GMP), the MPFR
1164 1.3 mrg library and the MPC library are known to be miscompiled by earlier
1165 1.3 mrg versions of GCC on these platforms. We therefore recommend the use
1166 1.3 mrg of the exact versions of these libraries listed as minimal versions
1167 1.3 mrg in <a href="prerequisites.html">the prerequisites</a>.
1168 1.3 mrg
1169 1.5 mrg <p><hr /><a name="sparc_002dsun_002dsolaris2"></a>
1170 1.1 mrg
1171 1.5 mrg <h3 class="heading"><a name="TOC58"></a>sparc-sun-solaris2*</h3>
1172 1.1 mrg
1173 1.1 mrg <p>When GCC is configured to use GNU binutils 2.14 or later, the binaries
1174 1.1 mrg produced are smaller than the ones produced using Sun's native tools;
1175 1.1 mrg this difference is quite significant for binaries containing debugging
1176 1.1 mrg information.
1177 1.1 mrg
1178 1.1 mrg <p>Starting with Solaris 7, the operating system is capable of executing
1179 1.1 mrg 64-bit SPARC V9 binaries. GCC 3.1 and later properly supports
1180 1.1 mrg this; the <samp><span class="option">-m64</span></samp> option enables 64-bit code generation.
1181 1.1 mrg However, if all you want is code tuned for the UltraSPARC CPU, you
1182 1.1 mrg should try the <samp><span class="option">-mtune=ultrasparc</span></samp> option instead, which produces
1183 1.1 mrg code that, unlike full 64-bit code, can still run on non-UltraSPARC
1184 1.1 mrg machines.
1185 1.1 mrg
1186 1.1 mrg <p>When configuring on a Solaris 7 or later system that is running a kernel
1187 1.1 mrg that supports only 32-bit binaries, one must configure with
1188 1.1 mrg <samp><span class="option">--disable-multilib</span></samp>, since we will not be able to build the
1189 1.1 mrg 64-bit target libraries.
1190 1.1 mrg
1191 1.1 mrg <p>GCC 3.3 and GCC 3.4 trigger code generation bugs in earlier versions of
1192 1.1 mrg the GNU compiler (especially GCC 3.0.x versions), which lead to the
1193 1.1 mrg miscompilation of the stage1 compiler and the subsequent failure of the
1194 1.1 mrg bootstrap process. A workaround is to use GCC 3.2.3 as an intermediary
1195 1.1 mrg stage, i.e. to bootstrap that compiler with the base compiler and then
1196 1.1 mrg use it to bootstrap the final compiler.
1197 1.1 mrg
1198 1.1 mrg <p>GCC 3.4 triggers a code generation bug in versions 5.4 (Sun ONE Studio 7)
1199 1.1 mrg and 5.5 (Sun ONE Studio 8) of the Sun compiler, which causes a bootstrap
1200 1.1 mrg failure in form of a miscompilation of the stage1 compiler by the Sun
1201 1.1 mrg compiler. This is Sun bug 4974440. This is fixed with patch 112760-07.
1202 1.1 mrg
1203 1.1 mrg <p>GCC 3.4 changed the default debugging format from Stabs to DWARF-2 for
1204 1.1 mrg 32-bit code on Solaris 7 and later. If you use the Sun assembler, this
1205 1.1 mrg change apparently runs afoul of Sun bug 4910101 (which is referenced as
1206 1.1 mrg an x86-only problem by Sun, probably because they do not use DWARF-2).
1207 1.1 mrg A symptom of the problem is that you cannot compile C++ programs like
1208 1.1 mrg <samp><span class="command">groff</span></samp> 1.19.1 without getting messages similar to the following:
1209 1.1 mrg
1210 1.1 mrg <pre class="smallexample"> ld: warning: relocation error: R_SPARC_UA32: ...
1211 1.1 mrg external symbolic relocation against non-allocatable section
1212 1.1 mrg .debug_info cannot be processed at runtime: relocation ignored.
1213 1.1 mrg </pre>
1214 1.1 mrg <p class="noindent">To work around this problem, compile with <samp><span class="option">-gstabs+</span></samp> instead of
1215 1.1 mrg plain <samp><span class="option">-g</span></samp>.
1216 1.1 mrg
1217 1.3 mrg <p>When configuring the GNU Multiple Precision Library (GMP), the MPFR
1218 1.3 mrg library or the MPC library on a Solaris 7 or later system, the canonical
1219 1.3 mrg target triplet must be specified as the <samp><span class="command">build</span></samp> parameter on the
1220 1.3 mrg configure line. This target triplet can be obtained by invoking <samp><span class="command">./config.guess</span></samp> in the toplevel source directory of GCC (and
1221 1.3 mrg not that of GMP or MPFR or MPC). For example on a Solaris 9 system:
1222 1.1 mrg
1223 1.3 mrg <pre class="smallexample"> % ./configure --build=sparc-sun-solaris2.9 --prefix=xxx
1224 1.1 mrg </pre>
1225 1.5 mrg <p><hr /><a name="sparc_002dsun_002dsolaris210"></a>
1226 1.1 mrg
1227 1.5 mrg <h3 class="heading"><a name="TOC59"></a>sparc-sun-solaris2.10</h3>
1228 1.1 mrg
1229 1.1 mrg <p>There is a bug in older versions of the Sun assembler which breaks
1230 1.1 mrg thread-local storage (TLS). A typical error message is
1231 1.1 mrg
1232 1.1 mrg <pre class="smallexample"> ld: fatal: relocation error: R_SPARC_TLS_LE_HIX22: file /var/tmp//ccamPA1v.o:
1233 1.1 mrg symbol <unknown>: bad symbol type SECT: symbol type must be TLS
1234 1.1 mrg </pre>
1235 1.1 mrg <p class="noindent">This bug is fixed in Sun patch 118683-03 or later.
1236 1.1 mrg
1237 1.5 mrg <p><hr /><a name="sparc_002dx_002dlinux"></a>
1238 1.1 mrg
1239 1.5 mrg <h3 class="heading"><a name="TOC60"></a>sparc-*-linux*</h3>
1240 1.1 mrg
1241 1.1 mrg <p>GCC versions 3.0 and higher require binutils 2.11.2 and glibc 2.2.4
1242 1.1 mrg or newer on this platform. All earlier binutils and glibc
1243 1.1 mrg releases mishandled unaligned relocations on <code>sparc-*-*</code> targets.
1244 1.1 mrg
1245 1.5 mrg <p><hr /><a name="sparc64_002dx_002dsolaris2"></a>
1246 1.1 mrg
1247 1.5 mrg <h3 class="heading"><a name="TOC61"></a>sparc64-*-solaris2*</h3>
1248 1.1 mrg
1249 1.3 mrg <p>When configuring the GNU Multiple Precision Library (GMP), the MPFR
1250 1.3 mrg library or the MPC library, the canonical target triplet must be specified
1251 1.3 mrg as the <samp><span class="command">build</span></samp> parameter on the configure line. For example
1252 1.3 mrg on a Solaris 9 system:
1253 1.1 mrg
1254 1.3 mrg <pre class="smallexample"> % ./configure --build=sparc64-sun-solaris2.9 --prefix=xxx
1255 1.1 mrg </pre>
1256 1.1 mrg <p>The following compiler flags must be specified in the configure
1257 1.1 mrg step in order to bootstrap this target with the Sun compiler:
1258 1.1 mrg
1259 1.3 mrg <pre class="smallexample"> % CC="cc -xarch=v9 -xildoff" <var>srcdir</var>/configure [<var>options</var>] [<var>target</var>]
1260 1.1 mrg </pre>
1261 1.1 mrg <p class="noindent"><samp><span class="option">-xarch=v9</span></samp> specifies the SPARC-V9 architecture to the Sun toolchain
1262 1.1 mrg and <samp><span class="option">-xildoff</span></samp> turns off the incremental linker.
1263 1.1 mrg
1264 1.5 mrg <p><hr /><a name="sparcv9_002dx_002dsolaris2"></a>
1265 1.1 mrg
1266 1.5 mrg <h3 class="heading"><a name="TOC62"></a>sparcv9-*-solaris2*</h3>
1267 1.1 mrg
1268 1.1 mrg <p>This is a synonym for ‘<samp><span class="samp">sparc64-*-solaris2*</span></samp>’.
1269 1.1 mrg
1270 1.5 mrg <p><hr /><a name="c6x_002dx_002dx"></a>
1271 1.1 mrg
1272 1.5 mrg <h3 class="heading"><a name="TOC63"></a>c6x-*-*</h3>
1273 1.3 mrg
1274 1.3 mrg <p>The C6X family of processors. This port requires binutils-2.22 or newer.
1275 1.3 mrg
1276 1.5 mrg <p><hr /><a name="tilegx_002d_002a_002dlinux"></a>
1277 1.5 mrg
1278 1.5 mrg <h3 class="heading"><a name="TOC64"></a>tilegx-*-linux*</h3>
1279 1.5 mrg
1280 1.5 mrg <p>The TILE-Gx processor in little endian mode, running GNU/Linux. This
1281 1.5 mrg port requires binutils-2.22 or newer.
1282 1.5 mrg
1283 1.5 mrg <p><hr /><a name="tilegxbe_002d_002a_002dlinux"></a>
1284 1.3 mrg
1285 1.5 mrg <h3 class="heading"><a name="TOC65"></a>tilegxbe-*-linux*</h3>
1286 1.3 mrg
1287 1.5 mrg <p>The TILE-Gx processor in big endian mode, running GNU/Linux. This
1288 1.5 mrg port requires binutils-2.23 or newer.
1289 1.3 mrg
1290 1.5 mrg <p><hr /><a name="tilepro_002d_002a_002dlinux"></a>
1291 1.3 mrg
1292 1.5 mrg <h3 class="heading"><a name="TOC66"></a>tilepro-*-linux*</h3>
1293 1.3 mrg
1294 1.3 mrg <p>The TILEPro processor running GNU/Linux. This port requires
1295 1.3 mrg binutils-2.22 or newer.
1296 1.3 mrg
1297 1.5 mrg <p><hr /><a name="visium_002dx_002delf"></a>
1298 1.5 mrg
1299 1.5 mrg <h3 class="heading"><a name="TOC67"></a>visium-*-elf</h3>
1300 1.5 mrg
1301 1.5 mrg <p>CDS VISIUMcore processor.
1302 1.5 mrg This configuration is intended for embedded systems.
1303 1.5 mrg
1304 1.5 mrg <p><hr /><a name="x_002dx_002dvxworks"></a>
1305 1.3 mrg
1306 1.5 mrg <h3 class="heading"><a name="TOC68"></a>*-*-vxworks*</h3>
1307 1.1 mrg
1308 1.1 mrg <p>Support for VxWorks is in flux. At present GCC supports <em>only</em> the
1309 1.1 mrg very recent VxWorks 5.5 (aka Tornado 2.2) release, and only on PowerPC.
1310 1.1 mrg We welcome patches for other architectures supported by VxWorks 5.5.
1311 1.1 mrg Support for VxWorks AE would also be welcome; we believe this is merely
1312 1.1 mrg a matter of writing an appropriate “configlette” (see below). We are
1313 1.1 mrg not interested in supporting older, a.out or COFF-based, versions of
1314 1.1 mrg VxWorks in GCC 3.
1315 1.1 mrg
1316 1.1 mrg <p>VxWorks comes with an older version of GCC installed in
1317 1.1 mrg <samp><var>$WIND_BASE</var><span class="file">/host</span></samp>; we recommend you do not overwrite it.
1318 1.1 mrg Choose an installation <var>prefix</var> entirely outside <var>$WIND_BASE</var>.
1319 1.1 mrg Before running <samp><span class="command">configure</span></samp>, create the directories <samp><var>prefix</var></samp>
1320 1.1 mrg and <samp><var>prefix</var><span class="file">/bin</span></samp>. Link or copy the appropriate assembler,
1321 1.1 mrg linker, etc. into <samp><var>prefix</var><span class="file">/bin</span></samp>, and set your <var>PATH</var> to
1322 1.1 mrg include that directory while running both <samp><span class="command">configure</span></samp> and
1323 1.1 mrg <samp><span class="command">make</span></samp>.
1324 1.1 mrg
1325 1.1 mrg <p>You must give <samp><span class="command">configure</span></samp> the
1326 1.1 mrg <samp><span class="option">--with-headers=</span><var>$WIND_BASE</var><span class="option">/target/h</span></samp> switch so that it can
1327 1.1 mrg find the VxWorks system headers. Since VxWorks is a cross compilation
1328 1.1 mrg target only, you must also specify <samp><span class="option">--target=</span><var>target</var></samp>.
1329 1.1 mrg <samp><span class="command">configure</span></samp> will attempt to create the directory
1330 1.1 mrg <samp><var>prefix</var><span class="file">/</span><var>target</var><span class="file">/sys-include</span></samp> and copy files into it;
1331 1.1 mrg make sure the user running <samp><span class="command">configure</span></samp> has sufficient privilege
1332 1.1 mrg to do so.
1333 1.1 mrg
1334 1.1 mrg <p>GCC's exception handling runtime requires a special “configlette”
1335 1.1 mrg module, <samp><span class="file">contrib/gthr_supp_vxw_5x.c</span></samp>. Follow the instructions in
1336 1.1 mrg that file to add the module to your kernel build. (Future versions of
1337 1.1 mrg VxWorks will incorporate this module.)
1338 1.1 mrg
1339 1.5 mrg <p><hr /><a name="x86_002d64_002dx_002dx"></a>
1340 1.1 mrg
1341 1.5 mrg <h3 class="heading"><a name="TOC69"></a>x86_64-*-*, amd64-*-*</h3>
1342 1.1 mrg
1343 1.1 mrg <p>GCC supports the x86-64 architecture implemented by the AMD64 processor
1344 1.1 mrg (amd64-*-* is an alias for x86_64-*-*) on GNU/Linux, FreeBSD and NetBSD.
1345 1.1 mrg On GNU/Linux the default is a bi-arch compiler which is able to generate
1346 1.1 mrg both 64-bit x86-64 and 32-bit x86 code (via the <samp><span class="option">-m32</span></samp> switch).
1347 1.1 mrg
1348 1.5 mrg <p><hr /><a name="x86_002d64_002dx_002dsolaris210"></a>
1349 1.1 mrg
1350 1.5 mrg <h3 class="heading"><a name="TOC70"></a>x86_64-*-solaris2.1[0-9]*</h3>
1351 1.3 mrg
1352 1.3 mrg <p>GCC also supports the x86-64 architecture implemented by the AMD64
1353 1.3 mrg processor (‘<samp><span class="samp">amd64-*-*</span></samp>’ is an alias for ‘<samp><span class="samp">x86_64-*-*</span></samp>’) on
1354 1.3 mrg Solaris 10 or later. Unlike other systems, without special options a
1355 1.3 mrg bi-arch compiler is built which generates 32-bit code by default, but
1356 1.3 mrg can generate 64-bit x86-64 code with the <samp><span class="option">-m64</span></samp> switch. Since
1357 1.3 mrg GCC 4.7, there is also configuration that defaults to 64-bit code, but
1358 1.3 mrg can generate 32-bit code with <samp><span class="option">-m32</span></samp>. To configure and build
1359 1.3 mrg this way, you have to provide all support libraries like <samp><span class="file">libgmp</span></samp>
1360 1.3 mrg as 64-bit code, configure with <samp><span class="option">--target=x86_64-pc-solaris2.1x</span></samp>
1361 1.3 mrg and ‘<samp><span class="samp">CC=gcc -m64</span></samp>’.
1362 1.3 mrg
1363 1.5 mrg <p><hr /><a name="xtensa_002dx_002delf"></a>
1364 1.3 mrg
1365 1.5 mrg <h3 class="heading"><a name="TOC71"></a>xtensa*-*-elf</h3>
1366 1.1 mrg
1367 1.1 mrg <p>This target is intended for embedded Xtensa systems using the
1368 1.1 mrg ‘<samp><span class="samp">newlib</span></samp>’ C library. It uses ELF but does not support shared
1369 1.1 mrg objects. Designed-defined instructions specified via the
1370 1.1 mrg Tensilica Instruction Extension (TIE) language are only supported
1371 1.1 mrg through inline assembly.
1372 1.1 mrg
1373 1.1 mrg <p>The Xtensa configuration information must be specified prior to
1374 1.1 mrg building GCC. The <samp><span class="file">include/xtensa-config.h</span></samp> header
1375 1.1 mrg file contains the configuration information. If you created your
1376 1.1 mrg own Xtensa configuration with the Xtensa Processor Generator, the
1377 1.1 mrg downloaded files include a customized copy of this header file,
1378 1.1 mrg which you can use to replace the default header file.
1379 1.1 mrg
1380 1.5 mrg <p><hr /><a name="xtensa_002dx_002dlinux"></a>
1381 1.1 mrg
1382 1.5 mrg <h3 class="heading"><a name="TOC72"></a>xtensa*-*-linux*</h3>
1383 1.1 mrg
1384 1.1 mrg <p>This target is for Xtensa systems running GNU/Linux. It supports ELF
1385 1.1 mrg shared objects and the GNU C library (glibc). It also generates
1386 1.1 mrg position-independent code (PIC) regardless of whether the
1387 1.1 mrg <samp><span class="option">-fpic</span></samp> or <samp><span class="option">-fPIC</span></samp> options are used. In other
1388 1.1 mrg respects, this target is the same as the
1389 1.1 mrg <a href="#xtensa*-*-elf">‘<samp><span class="samp">xtensa*-*-elf</span></samp>’</a> target.
1390 1.1 mrg
1391 1.5 mrg <p><hr /><a name="windows"></a>
1392 1.1 mrg
1393 1.5 mrg <h3 class="heading"><a name="TOC73"></a>Microsoft Windows</h3>
1394 1.1 mrg
1395 1.5 mrg <h4 class="subheading"><a name="TOC74"></a>Intel 16-bit versions</h4>
1396 1.1 mrg
1397 1.1 mrg <p>The 16-bit versions of Microsoft Windows, such as Windows 3.1, are not
1398 1.1 mrg supported.
1399 1.1 mrg
1400 1.1 mrg <p>However, the 32-bit port has limited support for Microsoft
1401 1.1 mrg Windows 3.11 in the Win32s environment, as a target only. See below.
1402 1.1 mrg
1403 1.5 mrg <h4 class="subheading"><a name="TOC75"></a>Intel 32-bit versions</h4>
1404 1.1 mrg
1405 1.1 mrg <p>The 32-bit versions of Windows, including Windows 95, Windows NT, Windows
1406 1.1 mrg XP, and Windows Vista, are supported by several different target
1407 1.1 mrg platforms. These targets differ in which Windows subsystem they target
1408 1.1 mrg and which C libraries are used.
1409 1.1 mrg
1410 1.1 mrg <ul>
1411 1.1 mrg <li>Cygwin <a href="#x-x-cygwin">*-*-cygwin</a>: Cygwin provides a user-space
1412 1.1 mrg Linux API emulation layer in the Win32 subsystem.
1413 1.1 mrg <li>Interix <a href="#x-x-interix">*-*-interix</a>: The Interix subsystem
1414 1.1 mrg provides native support for POSIX.
1415 1.1 mrg <li>MinGW <a href="#x-x-mingw32">*-*-mingw32</a>: MinGW is a native GCC port for
1416 1.1 mrg the Win32 subsystem that provides a subset of POSIX.
1417 1.1 mrg <li>MKS i386-pc-mks: NuTCracker from MKS. See
1418 1.1 mrg <a href="http://www.mkssoftware.com/">http://www.mkssoftware.com/</a> for more information.
1419 1.1 mrg </ul>
1420 1.1 mrg
1421 1.5 mrg <h4 class="subheading"><a name="TOC76"></a>Intel 64-bit versions</h4>
1422 1.1 mrg
1423 1.1 mrg <p>GCC contains support for x86-64 using the mingw-w64
1424 1.1 mrg runtime library, available from <a href="http://mingw-w64.sourceforge.net/">http://mingw-w64.sourceforge.net/</a>.
1425 1.1 mrg This library should be used with the target triple x86_64-pc-mingw32.
1426 1.1 mrg
1427 1.1 mrg <p>Presently Windows for Itanium is not supported.
1428 1.1 mrg
1429 1.5 mrg <h4 class="subheading"><a name="TOC77"></a>Windows CE</h4>
1430 1.1 mrg
1431 1.3 mrg <p>Windows CE is supported as a target only on Hitachi
1432 1.1 mrg SuperH (sh-wince-pe), and MIPS (mips-wince-pe).
1433 1.1 mrg
1434 1.5 mrg <h4 class="subheading"><a name="TOC78"></a>Other Windows Platforms</h4>
1435 1.1 mrg
1436 1.1 mrg <p>GCC no longer supports Windows NT on the Alpha or PowerPC.
1437 1.1 mrg
1438 1.1 mrg <p>GCC no longer supports the Windows POSIX subsystem. However, it does
1439 1.1 mrg support the Interix subsystem. See above.
1440 1.1 mrg
1441 1.1 mrg <p>Old target names including *-*-winnt and *-*-windowsnt are no longer used.
1442 1.1 mrg
1443 1.1 mrg <p>PW32 (i386-pc-pw32) support was never completed, and the project seems to
1444 1.1 mrg be inactive. See <a href="http://pw32.sourceforge.net/">http://pw32.sourceforge.net/</a> for more information.
1445 1.1 mrg
1446 1.1 mrg <p>UWIN support has been removed due to a lack of maintenance.
1447 1.1 mrg
1448 1.5 mrg <p><hr /><a name="x_002dx_002dcygwin"></a>
1449 1.1 mrg
1450 1.5 mrg <h3 class="heading"><a name="TOC79"></a>*-*-cygwin</h3>
1451 1.1 mrg
1452 1.1 mrg <p>Ports of GCC are included with the
1453 1.1 mrg <a href="http://www.cygwin.com/">Cygwin environment</a>.
1454 1.1 mrg
1455 1.1 mrg <p>GCC will build under Cygwin without modification; it does not build
1456 1.1 mrg with Microsoft's C++ compiler and there are no plans to make it do so.
1457 1.1 mrg
1458 1.1 mrg <p>The Cygwin native compiler can be configured to target any 32-bit x86
1459 1.1 mrg cpu architecture desired; the default is i686-pc-cygwin. It should be
1460 1.1 mrg used with as up-to-date a version of binutils as possible; use either
1461 1.1 mrg the latest official GNU binutils release in the Cygwin distribution,
1462 1.1 mrg or version 2.20 or above if building your own.
1463 1.1 mrg
1464 1.5 mrg <p><hr /><a name="x_002dx_002dinterix"></a>
1465 1.1 mrg
1466 1.5 mrg <h3 class="heading"><a name="TOC80"></a>*-*-interix</h3>
1467 1.1 mrg
1468 1.1 mrg <p>The Interix target is used by OpenNT, Interix, Services For UNIX (SFU),
1469 1.1 mrg and Subsystem for UNIX-based Applications (SUA). Applications compiled
1470 1.1 mrg with this target run in the Interix subsystem, which is separate from
1471 1.1 mrg the Win32 subsystem. This target was last known to work in GCC 3.3.
1472 1.1 mrg
1473 1.5 mrg <p><hr /><a name="x_002dx_002dmingw32"></a>
1474 1.1 mrg
1475 1.5 mrg <h3 class="heading"><a name="TOC81"></a>*-*-mingw32</h3>
1476 1.1 mrg
1477 1.1 mrg <p>GCC will build with and support only MinGW runtime 3.12 and later.
1478 1.1 mrg Earlier versions of headers are incompatible with the new default semantics
1479 1.1 mrg of <code>extern inline</code> in <code>-std=c99</code> and <code>-std=gnu99</code> modes.
1480 1.1 mrg
1481 1.5 mrg <p><hr /><a name="older"></a>
1482 1.1 mrg
1483 1.5 mrg <h3 class="heading"><a name="TOC82"></a>Older systems</h3>
1484 1.1 mrg
1485 1.1 mrg <p>GCC contains support files for many older (1980s and early
1486 1.1 mrg 1990s) Unix variants. For the most part, support for these systems
1487 1.1 mrg has not been deliberately removed, but it has not been maintained for
1488 1.1 mrg several years and may suffer from bitrot.
1489 1.1 mrg
1490 1.1 mrg <p>Starting with GCC 3.1, each release has a list of “obsoleted” systems.
1491 1.1 mrg Support for these systems is still present in that release, but
1492 1.1 mrg <samp><span class="command">configure</span></samp> will fail unless the <samp><span class="option">--enable-obsolete</span></samp>
1493 1.1 mrg option is given. Unless a maintainer steps forward, support for these
1494 1.1 mrg systems will be removed from the next release of GCC.
1495 1.1 mrg
1496 1.1 mrg <p>Support for old systems as hosts for GCC can cause problems if the
1497 1.1 mrg workarounds for compiler, library and operating system bugs affect the
1498 1.1 mrg cleanliness or maintainability of the rest of GCC. In some cases, to
1499 1.1 mrg bring GCC up on such a system, if still possible with current GCC, may
1500 1.1 mrg require first installing an old version of GCC which did work on that
1501 1.1 mrg system, and using it to compile a more recent GCC, to avoid bugs in the
1502 1.1 mrg vendor compiler. Old releases of GCC 1 and GCC 2 are available in the
1503 1.1 mrg <samp><span class="file">old-releases</span></samp> directory on the <a href="../mirrors.html">GCC mirror sites</a>. Header bugs may generally be avoided using
1504 1.1 mrg <samp><span class="command">fixincludes</span></samp>, but bugs or deficiencies in libraries and the
1505 1.1 mrg operating system may still cause problems.
1506 1.1 mrg
1507 1.1 mrg <p>Support for older systems as targets for cross-compilation is less
1508 1.1 mrg problematic than support for them as hosts for GCC; if an enthusiast
1509 1.1 mrg wishes to make such a target work again (including resurrecting any of
1510 1.1 mrg the targets that never worked with GCC 2, starting from the last
1511 1.1 mrg version before they were removed), patches
1512 1.1 mrg <a href="../contribute.html">following the usual requirements</a> would be
1513 1.1 mrg likely to be accepted, since they should not affect the support for more
1514 1.1 mrg modern targets.
1515 1.1 mrg
1516 1.1 mrg <p>For some systems, old versions of GNU binutils may also be useful,
1517 1.1 mrg and are available from <samp><span class="file">pub/binutils/old-releases</span></samp> on
1518 1.1 mrg <a href="http://sourceware.org/mirrors.html">sourceware.org mirror sites</a>.
1519 1.1 mrg
1520 1.1 mrg <p>Some of the information on specific systems above relates to
1521 1.1 mrg such older systems, but much of the information
1522 1.1 mrg about GCC on such systems (which may no longer be applicable to
1523 1.1 mrg current GCC) is to be found in the GCC texinfo manual.
1524 1.1 mrg
1525 1.5 mrg <p><hr /><a name="elf"></a>
1526 1.1 mrg
1527 1.5 mrg <h3 class="heading"><a name="TOC83"></a>all ELF targets (SVR4, Solaris 2, etc.)</h3>
1528 1.1 mrg
1529 1.1 mrg <p>C++ support is significantly better on ELF targets if you use the
1530 1.1 mrg <a href="./configure.html#with-gnu-ld">GNU linker</a>; duplicate copies of
1531 1.1 mrg inlines, vtables and template instantiations will be discarded
1532 1.1 mrg automatically.
1533 1.1 mrg
1534 1.1 mrg <p><hr />
1535 1.1 mrg <p><a href="./index.html">Return to the GCC Installation page</a>
1536 1.1 mrg
1537 1.1 mrg <!-- ***Old documentation****************************************************** -->
1538 1.1 mrg <!-- ***GFDL******************************************************************** -->
1539 1.1 mrg <!-- *************************************************************************** -->
1540 1.1 mrg <!-- Part 6 The End of the Document -->
1541 1.1 mrg </body></html>
1542 1.1 mrg
1543