@c Copyright (C) 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
@c 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
-@c 2010 Free Software Foundation, Inc.
+@c 2010, 2011 Free Software Foundation, Inc.
@c *** Converted to texinfo by Dean Wakerley, dean@wakerley.com
@c IMPORTANT: whenever you modify this file, run `install.texi2html' to
systems' @command{tar} programs will also work, only try GNU
@command{tar} if you have problems.
+@item Perl version 5.6.1 (or later)
+
+Necessary when targetting Darwin, building @samp{libstdc++},
+and not using @option{--disable-symvers}.
+Necessary when targetting Solaris 2 with Sun @command{ld} and not using
+@option{--disable-symvers}. The bundled @command{perl} in Solaris@tie{}8
+and up works.
+
+Necessary when regenerating @file{Makefile} dependencies in libiberty.
+Necessary when regenerating @file{libiberty/functions.texi}.
+Necessary when generating manpages from Texinfo manuals.
+Used by various scripts to generate some files included in SVN (mainly
+Unicode-related and rarely changing) from source tables.
+
+@item @command{jar}, or InfoZIP (@command{zip} and @command{unzip})
+
+Necessary to build libgcj, the GCJ runtime.
+
+@end table
+
+Several support libraries are necessary to build GCC, some are required,
+others optional. While any sufficiently new version of required tools
+usually work, library requirements are generally stricter. Newer
+versions may work in some cases, but it's safer to use the exact
+versions documented. We appreciate bug reports about problems with
+newer versions, though.
+
+@table @asis
@item GNU Multiple Precision Library (GMP) version 4.3.2 (or later)
Necessary to build GCC@. If you do not have it installed in your
In both cases @option{--with-cloog} configure option should be used
if CLooG is not installed in your default library search path.
-@item @command{jar}, or InfoZIP (@command{zip} and @command{unzip})
-
-Necessary to build libgcj, the GCJ runtime.
-
@end table
@heading Tools/packages necessary for modifying GCC
Necessary to access the SVN repository. Public releases and weekly
snapshots of the development sources are also available via FTP@.
-@item Perl version 5.6.1 (or later)
-
-Necessary when regenerating @file{Makefile} dependencies in libiberty.
-Necessary when regenerating @file{libiberty/functions.texi}.
-Necessary when generating manpages from Texinfo manuals.
-Necessary when targetting Darwin, building @samp{libstdc++},
-and not using @option{--disable-symvers}.
-Necessary when targetting Solaris 2 with Sun @command{ld}, building
-@samp{libstdc++}, and not using @option{--disable-symvers}. A helper
-scripts needs @samp{Glob.pm}, which is missing from @command{perl} 5.005
-included in Solaris@tie{}8. The bundled @command{perl} in Solaris@tie{}9 and up
-works.
-Used by various scripts to generate some files included in SVN (mainly
-Unicode-related and rarely changing) from source tables.
-
@item GNU diffutils version 2.7 (or later)
Useful when submitting patches for the GCC source code.
Some targets provide finer-grained control over which multilibs are built
(e.g., @option{--disable-softfloat}):
@table @code
-@item arc-*-elf*
-biendian.
-
@item arm-*-*
fpu, 26bit, underscore, interwork, biendian, nofmult.
causes GCC to use the same thread primitives as Ada uses. This option
is necessary when using both Ada and the back end exception handling,
which is the default for most Ada targets.
-@item mach
-Generic MACH thread support, known to work on NeXTSTEP@. (Please note
-that the file needed to support this configuration, @file{gthr-mach.h}, is
-missing and thus this setting will cause a known bootstrap failure.)
+@item lynx
+LynxOS thread support.
+@item mipssde
+MIPS SDE thread support.
+@item nks
+Novell Kernel Services thread support.
@item no
This is an alias for @samp{single}.
@item posix
RTEMS thread support.
@item single
Disable thread support, should work for all platforms.
-@item solaris
-Sun Solaris 2/Unix International thread support. Only use this if you
-really need to use this legacy API instead of the default, @samp{posix}.
+@item tpf
+TPF thread support.
@item vxworks
VxWorks thread support.
@item win32
Microsoft Win32 API thread support.
-@item nks
-Novell Kernel Services thread support.
@end table
@item --enable-tls
@item
@uref{#alpha-dec-osf51,,alpha*-dec-osf5.1}
@item
-@uref{#arc-x-elf,,arc-*-elf}
-@item
@uref{#arm-x-elf,,arm-*-elf}
@item
@uref{#avr,,avr}
@item
@uref{#m32r-x-elf,,m32r-*-elf}
@item
-@uref{#m6811-elf,,m6811-elf}
-@item
-@uref{#m6812-elf,,m6812-elf}
-@item
@uref{#m68k-x-x,,m68k-*-*}
@item
@uref{#m68k-uclinux,,m68k-uclinux}
the OS version used, you need a data segment size between 512 MB and
1 GB, so simply use @command{ulimit -Sd unlimited}.
-As of GNU binutils 2.20.1, neither GNU @command{as} nor GNU @command{ld}
+As of GNU binutils 2.21, neither GNU @command{as} nor GNU @command{ld}
are supported on Tru64 UNIX, so you must not configure GCC with
@option{--with-gnu-as} or @option{--with-gnu-ld}.
@html
<hr />
@end html
-@heading @anchor{arc-x-elf}arc-*-elf
-Argonaut ARC processor.
-This configuration is intended for embedded systems.
-
-@html
-<hr />
-@end html
@heading @anchor{arm-x-elf}arm-*-elf
ARM-family processors. Subtargets that use the ELF object format
require GNU binutils 2.13 or newer. Such subtargets include:
@html
<hr />
@end html
-@heading @anchor{crx}CRX
-
-The CRX CompactRISC architecture is a low-power 32-bit architecture with
-fast context switching and architectural extensibility features.
-
-@ifnothtml
-@xref{CRX Options,, CRX Options, gcc, Using and Porting the GNU Compiler
-Collection (GCC)},
-@end ifnothtml
-
-@ifhtml
-See ``CRX Options'' in the main manual for a list of CRX-specific options.
-@end ifhtml
-
-Use @samp{configure --target=crx-elf --enable-languages=c,c++} to configure
-GCC@ for building a CRX cross-compiler. The option @samp{--target=crx-elf}
-is also used to build the @samp{newlib} C library for CRX.
-
-It is also possible to build libstdc++-v3 for the CRX architecture. This
-needs to be done in a separate step with the following configure settings:
-
-@smallexample
-gcc/libstdc++-v3/configure --host=crx-elf --with-newlib \
- --enable-sjlj-exceptions --enable-cxx-flags='-fexceptions -frtti'
-@end smallexample
-
-@html
-<hr />
-@end html
@heading @anchor{dos}DOS
Please have a look at the @uref{binaries.html,,binaries page}.
While GCC works around them, several features are missing, so it is
@c FIXME: which ones?
recommended to use the GNU assembler instead. There is no bundled
-version, but the current version, from GNU binutils 2.20.1, is known to
+version, but the current version, from GNU binutils 2.21, is known to
work.
Solaris@tie{}2/x86 doesn't support the execution of SSE/SSE2 instructions
@file{/usr/sfw/bin/gas}. The versions included in Solaris 10, from GNU
binutils 2.15, and Solaris 11, from GNU binutils 2.19, work fine,
although the current version, from GNU binutils
-2.20.1, is known to work, too. Recent versions of the Sun assembler in
+2.21, is known to work, too. Recent versions of the Sun assembler in
@file{/usr/ccs/bin/as} work almost as well, though.
@c FIXME: as patch requirements?
linker instead, which is available in @file{/usr/sfw/bin/gld}, note that
due to a packaging bug the version in Solaris 10, from GNU binutils
2.15, cannot be used, while the version in Solaris 11, from GNU binutils
-2.19, works, as does the latest version, from GNU binutils 2.20.1.
+2.19, works, as does the latest version, from GNU binutils 2.21.
To use GNU @command{as}, configure with the options
@option{--with-gnu-as --with-as=@//usr/@/sfw/@/bin/@/gas}. It may be necessary
@html
<hr />
@end html
-@heading @anchor{m6811-elf}m6811-elf
-Motorola 68HC11 family micro controllers. These are used in embedded
-applications. There are no standard Unix configurations.
-
-@html
-<hr />
-@end html
-@heading @anchor{m6812-elf}m6812-elf
-Motorola 68HC12 family micro controllers. These are used in embedded
-applications. There are no standard Unix configurations.
-
-@html
-<hr />
-@end html
@heading @anchor{m68k-x-x}m68k-*-*
By default,
@samp{m68k-*-elf*}, @samp{m68k-*-rtems}, @samp{m68k-*-uclinux} and
@samp{m68000}, @samp{m68010}, @samp{m68020}, @samp{m68030},
@samp{m68040}, @samp{m68060}, @samp{m68020-40} and @samp{m68020-60}.
+GCC requires at least binutils version 2.17 on these targets.
+
@html
<hr />
@end html
GCC 4.3 changed the uClinux configuration so that it uses the
@samp{m68k-linux-gnu} ABI rather than the @samp{m68k-elf} ABI.
It also added improved support for C++ and flat shared libraries,
-both of which were ABI changes. However, you can still use the
-original ABI by configuring for @samp{m68k-uclinuxoldabi} or
-@samp{m68k-@var{vendor}-uclinuxoldabi}.
+both of which were ABI changes.
@html
have the 64-bit libraries installed.
GCC must be configured with GNU @command{as}. The latest version, from GNU
-binutils 2.20.1, is known to work. On the other hand, bootstrap fails
+binutils 2.21, is known to work. On the other hand, bootstrap fails
with GNU @command{ld} at least since GNU binutils 2.17.
The @option{--enable-libgcj}
@c alone is too unspecific and must be avoided.
@heading @anchor{x-x-solaris2}*-*-solaris2*
-Support for Solaris 7 has been removed in GCC 4.6.
+Support for Solaris 8 has been obsoleted in GCC 4.7, but can still be
+enabled by configuring with @option{--enable-obsolete}. Support will be
+removed in GCC 4.8. Support for Solaris 7 has been removed in GCC 4.6.
Sun does not ship a C compiler with Solaris 2, though you can download
-the Sun Studio compilers for free from
-@uref{http://developers.sun.com/sunstudio/downloads/}. Alternatively,
+the Sun Studio compilers for free. Alternatively,
you can install a pre-built GCC to bootstrap and install GCC. See the
@uref{binaries.html,,binaries page} for details.
conjunction with the Sun linker. The GNU @command{as}
versions included in Solaris 10, from GNU binutils 2.15, and Solaris 11,
from GNU binutils 2.19, are known to work. They can be found in
-@file{/usr/sfw/bin/gas}. Current versions of GNU binutils (2.20.1)
+@file{/usr/sfw/bin/gas}. Current versions of GNU binutils (2.21)
are known to work as well. Note that your mileage may vary
if you use a combination of the GNU tools and the Sun tools: while the
combination GNU @command{as} + Sun @command{ld} should reasonably work,
@c FIXME: still?
GNU @command{ld} usually works as well, although the version included in
Solaris 10 cannot be used due to several bugs. Again, the current
-version (2.20.1) is known to work, but generally lacks platform specific
+version (2.21) is known to work, but generally lacks platform specific
features, so better stay with Sun @command{ld}.
To enable symbol versioning in @samp{libstdc++} with Sun @command{ld},
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