\input texinfo.tex @c -*-texinfo-*-
@c @ifnothtml
@c %**start of header
-@setfilename install.info
+@setfilename gccinstall.info
@settitle Installing GCC
@setchapternewpage odd
@c %**end of header
@ifset binarieshtml
@settitle Installing GCC: Binaries
@end ifset
+@ifset oldhtml
+@settitle Installing GCC: Old documentation
+@end ifset
+@ifset gfdlhtml
+@settitle Installing GCC: GNU Free Documentation License
+@end ifset
-@c Copyright (C) 2001 Free Software Foundation, Inc.
+@c Copyright (C) 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
+@c 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
@c *** Converted to texinfo by Dean Wakerley, dean@wakerley.com
@c Include everything if we're not making html
@set testhtml
@set finalinstallhtml
@set binarieshtml
+@set oldhtml
+@set gfdlhtml
@end ifnothtml
@c Part 2 Summary Description and Copyright
+@copying
+Copyright @copyright{} 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
+1999, 2000, 2001, 2002 Free Software Foundation, Inc.
+@sp 1
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.1 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, the Front-Cover texts being (a) (see below), and
+with the Back-Cover Texts being (b) (see below). A copy of the
+license is included in the section entitled ``@uref{./gfdl.html,,GNU
+Free Documentation License}''.
+
+(a) The FSF's Front-Cover Text is:
+
+ A GNU Manual
+
+(b) The FSF's Back-Cover Text is:
+
+ You have freedom to copy and modify this GNU Manual, like GNU
+ software. Copies published by the Free Software Foundation raise
+ funds for GNU development.
+@end copying
@ifinfo
-
-Copyright @copyright{} 2001 Free Software Foundation, Inc.
+@insertcopying
@end ifinfo
@c Part 3 Titlepage and Copyright
@c The following two commands start the copyright page.
@page
@vskip 0pt plus 1filll
-Copyright @copyright{} 2001 Free Software Foundation, Inc.
+@insertcopying
@end titlepage
@c Part 4 Top node and Master Menu
* Specific:: Host/target specific installation notes for GCC.
* Binaries:: Where to get pre-compiled binaries.
+* Old:: Old installation documentation.
+
+* GNU Free Documentation License:: How you can copy and share this manual.
* Concept Index:: This index has two entries.
@end menu
@end ifinfo
@node Installing GCC, Binaries, , Top
@end ifnothtml
@ifset indexhtml
-@html
-<h1 align="center">Installing GCC</h1>
-@end html
@ifnothtml
@chapter Installing GCC
@end ifnothtml
you proceed.
Lists of successful builds for released versions of GCC are
-available at our web pages for
-@uref{http://gcc.gnu.org/gcc-3.0/buildstat.html,,3.0}
-and
-@uref{http://gcc.gnu.org/gcc-2.95/buildstat.html,,2.95}.
+available at @uref{http://gcc.gnu.org/buildstat.html}.
These lists are updated as new information becomes available.
The installation procedure itself is broken into five steps.
any longer, and, if shared libraries are installed there as well, no
more binaries exist that use them.
+@ifhtml
+There are also some @uref{old.html,,old installation instructions},
+which are mostly obsolete but still contain some information which has
+not yet been merged into the main part of this manual.
+@end ifhtml
+
@html
-<hr>
+<hr />
<p>
@end html
@ifhtml
@uref{./index.html,,Return to the GCC Installation page}
+
+@insertcopying
@end ifhtml
@end ifset
@node Downloading the source, Configuration, , Installing GCC
@end ifnothtml
@ifset downloadhtml
-@html
-<h1 align="center">Downloading GCC</h1>
-@end html
@ifnothtml
@chapter Downloading GCC
@end ifnothtml
for information on how to obtain GCC@.
The full distribution includes the C, C++, Objective-C, Fortran, Java,
-and CHILL compilers. The full distribution also includes runtime libraries
-for C++, Objective-C, Fortran, Java and CHILL. (GCC 3.0 does not
-include CHILL.) In GCC 3.0 and later versions, GNU compiler testsuites
-are also included in the full distribution.
+and Ada (in case of GCC 3.1 and later) compilers. The full distribution
+also includes runtime libraries for C++, Objective-C, Fortran, and Java.
+In GCC 3.0 and later versions, GNU compiler testsuites are also included
+in the full distribution.
If you choose to download specific components, you must download the core
GCC distribution plus any language specific distributions you wish to
@file{opcodes}, @dots{}) to the directory containing the GCC sources.
@html
-<hr>
+<hr />
<p>
@end html
@ifhtml
@node Configuration, Building, Downloading the source, Installing GCC
@end ifnothtml
@ifset configurehtml
-@html
-<h1 align="center">Installing GCC: Configuration</h1>
-@end html
@ifnothtml
@chapter Installing GCC: Configuration
@end ifnothtml
@file{gcc} directory, the one where the @file{MAINTAINERS} can be found,
and not its @file{gcc} subdirectory, otherwise the build will fail.
+If either @var{srcdir} or @var{objdir} is located on an automounted NFS
+file system, the shell's built-in @command{pwd} command will return
+temporary pathnames. Using these can lead to various sorts of build
+problems. To avoid this issue, set the @env{PWDCMD} environment
+variable to an automounter-aware @command{pwd} command, e.g.,
+@command{pawd} or @command{amq -w}, during the configuration and build
+phases.
+
First, we @strong{highly} recommend that GCC be built into a
separate directory than the sources which does @strong{not} reside
within the source tree. This is how we generally build GCC; building
If you have previously built GCC in the same directory for a
different target machine, do @samp{make distclean} to delete all files
-that might be invalid. One of the files this deletes is
-@file{Makefile}; if @samp{make distclean} complains that @file{Makefile}
-does not exist, it probably means that the directory is already suitably
-clean. However, with the recommended method of building in a separate
-@var{objdir}, you should simply use a different @var{objdir} for each
-target.
+that might be invalid. One of the files this deletes is @file{Makefile};
+if @samp{make distclean} complains that @file{Makefile} does not exist
+or issues a message like ``don't know how to make distclean'' it probably
+means that the directory is already suitably clean. However, with the
+recommended method of building in a separate @var{objdir}, you should
+simply use a different @var{objdir} for each target.
Second, when configuring a native system, either @command{cc} or
@command{gcc} must be in your path or you must set @env{CC} in
@heading Options specification
Use @var{options} to override several configure time options for
-GCC@. A partial list of supported @var{options}:
+GCC@. A list of supported @var{options} follows; @command{configure
+--help} may list other options, but those not listed below may not
+work and should not normally be used.
@table @code
@item --prefix=@var{dirname}
These additional options control where certain parts of the distribution
are installed. Normally you should not need to use these options.
@table @code
-
@item --exec-prefix=@var{dirname}
Specify the toplevel installation directory for architecture-dependent
files. The default is @file{@var{prefix}}.
Specify the installation directory for documentation in info format.
The default is @file{@var{prefix}/info}.
+@item --datadir=@var{dirname}
+Specify the installation directory for some architecture-independent
+data files referenced by GCC@. The default is @file{@var{prefix}/share}.
+
@item --mandir=@var{dirname}
Specify the installation directory for manual pages. The default is
@file{@var{prefix}/man}. (Note that the manual pages are only extracts from
@end table
+@item --program-prefix=@var{prefix}
+GCC supports some transformations of the names of its programs when
+installing them. This option prepends @var{prefix} to the names of
+programs to install in @var{bindir} (see above). For example, specifying
+@option{--program-prefix=foo-} would result in @samp{gcc}
+being installed as @file{/usr/local/bin/foo-gcc}.
+
+@item --program-suffix=@var{suffix}
+Appends @var{suffix} to the names of programs to install in @var{bindir}
+(see above). For example, specifying @option{--program-suffix=-3.1}
+would result in @samp{gcc} being installed as
+@file{/usr/local/bin/gcc-3.1}.
+
+@item --program-transform-name=@var{pattern}
+Applies the @samp{sed} script @var{pattern} to be applied to the names
+of programs to install in @var{bindir} (see above). @var{pattern} has to
+consist of one or more basic @samp{sed} editing commands, separated by
+semicolons. For example, if you want the @samp{gcc} program name to be
+transformed to the installed program @file{/usr/local/bin/myowngcc} and
+the @samp{g++} program name to be transformed to
+@file{/usr/local/bin/gspecial++} without changing other program names,
+you could use the pattern
+@option{--program-transform-name='s/^gcc$/myowngcc/; s/^g++$/gspecial++/'}
+to achieve this effect.
+
+All three options can be combined and used together, resulting in more
+complex conversion patterns. As a basic rule, @var{prefix} (and
+@var{suffix}) are prepended (appended) before further transformations
+can happen with a special transformation script @var{pattern}.
+
+As currently implemented, this option only takes effect for native
+builds; cross compiler binaries' names are not transformed even when a
+transformation is explicitly asked for by one of these options.
+
+For native builds, some of the installed programs are also installed
+with the target alias in front of their name, as in
+@samp{i686-pc-linux-gnu-gcc}. All of the above transformations happen
+before the target alias is prepended to the name - so, specifying
+@option{--program-prefix=foo-} and @option{program-suffix=-3.1}, the
+resulting binary would be installed as
+@file{/usr/local/bin/i686-pc-linux-gnu-foo-gcc-3.1}.
+
+As a last shortcoming, none of the installed Ada programs are
+transformed yet, which will be fixed in some time.
+
@item --with-local-prefix=@var{dirname}
Specify the
installation directory for local include files. The default is
programs---perhaps many others. (GCC installs its own header files in
another directory which is based on the @option{--prefix} value.)
+Both the local-prefix include directory and the GCC-prefix include
+directory are part of GCC's "system include" directories. Although these
+two directories are not fixed, they need to be searched in the proper
+order for the correct processing of the include_next directive. The
+local-prefix include directory is searched before the GCC-prefix
+include directory. Another characteristic of system include directories
+is that pedantic warnings are turned off for headers in these directories.
+
+Some autoconf macros add @option{-I @var{directory}} options to the
+compiler command line, to ensure that directories containing installed
+packages' headers are searched. When @var{directory} is one of GCC's
+system include directories, GCC will ignore the option so that system
+directories continue to be processed in the correct order. This
+may result in a search order different from what was specified but the
+directory will still be searched.
+
+GCC automatically searches for ordinary libraries using
+@env{GCC_EXEC_PREFIX}. Thus, when the same installation prefix is
+used for both GCC and packages, GCC will automatically search for
+both headers and libraries. This provides a configuration that is
+easy to use. GCC behaves in a manner similar to that when it is
+installed as a system compiler in @file{/usr}.
+
+Sites that need to install multiple versions of GCC may not want to
+use the above simple configuration. It is possible to use the
+@option{--program-prefix}, @option{--program-suffix} and
+@option{--program-transform-name} options to install multiple versions
+into a single directory, but it may be simpler to use different prefixes
+and the @option{--with-local-prefix} option to specify the location of the
+site-specific files for each version. It will then be necessary for
+users to specify explicitly the location of local site libraries
+(e.g., with @env{LIBRARY_PATH}).
+
+The same value can be used for both @option{--with-local-prefix} and
+@option{--prefix} provided it is not @file{/usr}. This can be used
+to avoid the default search of @file{/usr/local/include}.
+
@strong{Do not} specify @file{/usr} as the @option{--with-local-prefix}!
The directory you use for @option{--with-local-prefix} @strong{must not}
contain any of the system's standard header files. If it did contain
them, certain programs would be miscompiled (including GNU Emacs, on
certain targets), because this would override and nullify the header
-file corrections made by the @code{fixincludes} script.
+file corrections made by the @command{fixincludes} script.
Indications are that people who use this option use it based on mistaken
ideas of what it is for. People use it as if it specified where to
@item @anchor{with-gnu-as}--with-gnu-as
Specify that the compiler should assume that the
assembler it finds is the GNU assembler. However, this does not modify
-the rules to find an assembler and will result in confusion if found
-assembler is not actually the GNU assembler. (Confusion will also
+the rules to find an assembler and will result in confusion if the
+assembler found is not actually the GNU assembler. (Confusion may also
result if the compiler finds the GNU assembler but has not been
configured with @option{--with-gnu-as}.) If you have more than one
assembler installed on your system, you may want to use this option in
connection with @option{--with-as=@var{pathname}}.
-The systems where it makes a difference whether you use the GNU assembler are
-@samp{hppa1.0-@var{any}-@var{any}}, @samp{hppa1.1-@var{any}-@var{any}},
-@samp{i386-@var{any}-sysv}, @samp{i386-@var{any}-isc},
-@samp{i860-@var{any}-bsd}, @samp{m68k-bull-sysv},
-@samp{m68k-hp-hpux}, @samp{m68k-sony-bsd},
-@samp{m68k-altos-sysv}, @samp{m68000-hp-hpux},
-@samp{m68000-att-sysv}, @samp{@var{any}-lynx-lynxos},
-and @samp{mips-@var{any}}.
-On any other system, @option{--with-gnu-as} has no effect.
+The following systems are the only ones where it makes a difference
+whether you use the GNU assembler. On any other system,
+@option{--with-gnu-as} has no effect.
+
+@itemize bullet
+@item @samp{hppa1.0-@var{any}-@var{any}}
+@item @samp{hppa1.1-@var{any}-@var{any}}
+@item @samp{i386-@var{any}-sysv}
+@item @samp{m68k-bull-sysv}
+@item @samp{m68k-hp-hpux}
+@item @samp{m68000-hp-hpux}
+@item @samp{m68000-att-sysv}
+@item @samp{@var{any}-lynx-lynxos}
+@item @samp{mips-@var{any}}
+@end itemize
On the systems listed above (except for the HP-PA, for ISC on the
386, and for @samp{mips-sgi-irix5.*}), if you use the GNU assembler,
Some targets provide finer-grained control over which multilibs are built
(e.g., @option{--disable-softfloat}):
@table @code
-
@item arc-*-elf*
biendian.
@item powerpc*-*-*, rs6000*-*-*
aix64, pthread, softfloat, powercpu, powerpccpu, powerpcos, biendian,
-sysv, aix.
+sysv, aix.
@end table
@item --with-cpu=@var{cpu}
Specify which cpu variant the
compiler should generate code for by default. This is currently
-only supported on the some ports, specifically arm, powerpc, and
+only supported on some ports, specifically arm, powerpc, and
SPARC@. If configure does not recognize the model name (e.g.@: arm700,
-603e, or ultrasparc) you provide, please check the configure script
-for a complete list of supported models.
+603e, or ultrasparc) you provide, please check the
+@file{gcc/config.gcc} script for a complete list of supported models.
+
+@item --enable-altivec
+Specify that the target supports AltiVec vector enhancements. This
+option will adjust the ABI for AltiVec enhancements, as well as generate
+AltiVec code when appropriate. This option is only available for
+PowerPC systems.
@item --enable-target-optspace
Specify that target
Specify that the user visible @command{cpp} program should be installed
in @file{@var{prefix}/@var{dirname}/cpp}, in addition to @var{bindir}.
+@item --enable-initfini-array
+Force the use of sections @code{.init_array} and @code{.fini_array}
+(instead of @code{.init} and @code{.fini}) for constructors and
+destructors. Option @option{--disable-initfini-array} has the
+opposite effect. If neither option is specified, the configure script
+will try to guess whether the @code{.init_array} and
+@code{.fini_array} sections are supported and, if they are, use them.
+
@item --enable-maintainer-mode
The build rules that
regenerate the GCC master message catalog @file{gcc.pot} are normally
@end example
Currently, you can use any of the following:
@code{ada}, @code{c}, @code{c++}, @code{f77}, @code{java}, @code{objc}.
-@code{CHILL} is not currently maintained, and will almost
-certainly fail to compile. Building the Ada compiler has special
-requirements, see below.@*
+Building the Ada compiler has special requirements, see below.@*
If you do not pass this flag, all languages available in the @file{gcc}
sub-tree will be configured. Re-defining @code{LANGUAGES} when calling
@samp{make bootstrap} @strong{does not} work anymore, as those
@item --nfp
Specify that the machine does not have a floating point unit. This
-option only applies to @samp{m68k-sun-sunos@var{n}} and
-@samp{m68k-isi-bsd}. On any other system, @option{--nfp} has no effect.
+option only applies to @samp{m68k-sun-sunos@var{n}}. On any other
+system, @option{--nfp} has no effect.
+
+@item --enable-werror
+@itemx --disable-werror
+@itemx --enable-werror=yes
+@itemx --enable-werror=no
+When you specify this option, it controls whether certain files in the
+compiler are built with @option{-Werror} in bootstrap stage2 and later.
+If you don't specify it, @option{-Werror} is turned on for the main
+development trunk. However it defaults to off for release branches and
+final releases. The specific files which get @option{-Werror} are
+controlled by the Makefiles.
@item --enable-checking
@itemx --enable-checking=@var{list}
with GCC@. This is on by default when building from CVS or snapshots,
but off for releases. More control over the checks may be had by
specifying @var{list}; the categories of checks available are
-@samp{misc}, @samp{tree}, @samp{gc}, @samp{rtl} and @samp{gcac}. The
-default when @var{list} is not specified is @samp{misc,tree,gc}; the
+@samp{misc}, @samp{tree}, @samp{gc}, @samp{rtl}, @samp{rtlflag} and
+@samp{gcac}. The
+default when @var{list} is not specified is @samp{misc,tree,gc,rtlflag}; the
checks @samp{rtl} and @samp{gcac} are very expensive.
+@item --enable-coverage
+@item --enable-coverage=@var{level}
+With this option, the compiler is built to collect self coverage
+information, every time it is run. This is for internal development
+purposes, and only works when the compiler is being built with gcc. The
+@var{level} argument controls whether the compiler is built optimized or
+not, values are @samp{opt} and @samp{noopt}. For coverage analysis you
+want to disable optimization, for performance analysis you want to
+enable optimization. When coverage is enabled, the default level is
+without optimization.
+
@item --enable-nls
@itemx --disable-nls
The @option{--enable-nls} option enables Native Language Support (NLS),
ignores @code{catgets} and instead uses GCC's copy of the GNU
@code{gettext} library. The @option{--with-catgets} option causes the
build procedure to use the host's @code{catgets} in this situation.
+
+@item --with-libiconv-prefix=@var{dir}
+Search for libiconv header files in @file{@var{dir}/include} and
+libiconv library files in @file{@var{dir}/lib}.
+
+@item --with-system-zlib
+Use installed zlib rather than that included with GCC@. This option
+only applies if the Java front end is being built.
+
+@item --enable-obsolete
+Enable configuration for an obsoleted system. If you attempt to
+configure GCC for a system (build, host, or target) which has been
+obsoleted, and you do not specify this flag, configure will halt with an
+error message.
+
+All support for systems which have been obsoleted in one release of GCC
+is removed entirely in the next major release, unless someone steps
+forward to maintain the port.
@end table
Some options which only apply to building cross compilers:
@table @code
-@item --with-headers=@var{dir}
-Specifies a directory
-which has target include files.
-@emph{This options is required} when building a cross
-compiler, if @file{@var{prefix}/@var{target}/sys-include} doesn't pre-exist.
-These include files will be copied into the @file{gcc} install directory.
-Fixincludes will be run on these files to make them compatible with
-GCC.
-@item --with-libs=``@var{dir1} @var{dir2} @dots{} @var{dirN}''
+@item --with-sysroot
+@itemx --with-sysroot=@var{dir}
+Tells GCC to consider @var{dir} as the root of a tree that contains a
+(subset of) the root filesystem of the target operating system.
+Target system headers, libraries and run-time object files will be
+searched in there. The specified directory is not copied into the
+install tree, unlike the options @option{--with-headers} and
+@option{--with-libs} that this option obsoletes. The default value,
+in case @option{--with-sysroot} is not given an argument, is
+@option{$@{gcc_tooldir@}/sys-root}. Starting the pathname with
+@option{$@{gcc_tooldir@}/}, in such a way that this variable is not
+expanded by the shell, but rather by the gcc Makefile, enables the
+target sysroot directory to be relocatable along with the entire
+install tree, but it will require the gcc tool directory to be created
+@emph{before} the build is started. This directory, as well as its
+intermediate pathnames, can be easily created by running @command{make
+install-gcc-tooldir} the gcc build directory. This is not done
+automatically to avoid touching the install tree without explicit
+permission.
+
+@item --with-headers
+@itemx --with-headers=@var{dir}
+Deprecated in favor of @option{--with-sysroot}.
+Specifies that target headers are available when building a cross compiler.
+The @var{dir} argument specifies a directory which has the target include
+files. These include files will be copied into the @file{gcc} install
+directory. @emph{This option with the @var{dir} argument is required} when
+building a cross compiler, if @file{@var{prefix}/@var{target}/sys-include}
+doesn't pre-exist. If @file{@var{prefix}/@var{target}/sys-include} does
+pre-exist, the @var{dir} argument may be omitted. @command{fixincludes}
+will be run on these files to make them compatible with GCC.
+@item --with-libs
+@itemx --with-libs=``@var{dir1} @var{dir2} @dots{} @var{dirN}''
+Deprecated in favor of @option{--with-sysroot}.
Specifies a list of directories which contain the target runtime
libraries. These libraries will be copied into the @file{gcc} install
-directory.
+directory. If the directory list is omitted, this option has no
+effect.
@item --with-newlib
Specifies that @samp{newlib} is
being used as the target C library. This causes @code{__eprintf} to be
corresponding @option{--without} option.
@html
-<hr>
+<hr />
<p>
@end html
@ifhtml
@node Building, Testing, Configuration, Installing GCC
@end ifnothtml
@ifset buildhtml
-@html
-<h1 align="center">Installing GCC: Building</h1>
-@end html
@ifnothtml
@chapter Building
@end ifnothtml
Now that GCC is configured, you are ready to build the compiler and
runtime libraries.
-We @strong{highly} recommend that GCC be built using GNU make;
-other versions may work, then again they might not.
-GNU make is required for compiling GNAT, the Ada compiler.
+We @strong{highly} recommend that GCC be built using GNU make;
+other versions may work, then again they might not.
+GNU make is required for compiling GNAT (the Ada compiler) and the Java
+runtime library.
(For example, many broken versions of make will fail if you use the
recommended setup where @var{objdir} is different from @var{srcdir}.
It is normal to have compiler warnings when compiling certain files.
Unless you are a GCC developer, you can generally ignore these warnings
-unless they cause compilation to fail.
+unless they cause compilation to fail. Developers should attempt to fix
+any warnings encountered, however they can temporarily continue past
+warnings-as-errors by specifying the configure flag
+@option{--disable-werror}.
On certain old systems, defining certain environment variables such as
@env{CC} can interfere with the functioning of @command{make}.
directory. Make sure you have done all the necessary preparations.
If you build GCC on a BSD system using a directory stored in an old System
-V file system, problems may occur in running @code{fixincludes} if the
+V file system, problems may occur in running @command{fixincludes} if the
System V file system doesn't support symbolic links. These problems
result in a failure to fix the declaration of @code{size_t} in
@file{sys/types.h}. If you find that @code{size_t} is a signed type and
not need Bison installed to build them.
When building from CVS or snapshots, or if you modify Texinfo
-documentation, you need version 4.0 or later of Texinfo installed if you
+documentation, you need version 4.2 or later of Texinfo installed if you
want Info documentation to be regenerated. Releases contain Info
documentation pre-built for the unmodified documentation in the release.
@item
Build target tools for use by the compiler such as binutils (bfd,
binutils, gas, gprof, ld, and opcodes)
-if they have been individually linked
+if they have been individually linked
or moved into the top level GCC source tree before configuring.
@item
stage2 of the 3-stage bootstrap of the compiler are deleted as
soon as they are no longer needed.
-
If you want to save additional space during the bootstrap and in
the final installation as well, you can build the compiler binaries
-without debugging information with @samp{make CFLAGS='-O' LIBCFLAGS='-g
--O2' LIBCXXFLAGS='-g -O2 -fno-implicit-templates' bootstrap}. This will save
+without debugging information as in the following example. This will save
roughly 40% of disk space both for the bootstrap and the final installation.
(Libraries will still contain debugging information.)
+@example
+ make CFLAGS='-O' LIBCFLAGS='-g -O2' \
+ LIBCXXFLAGS='-g -O2 -fno-implicit-templates' bootstrap
+@end example
+
If you wish to use non-default GCC flags when compiling the stage2 and
stage3 compilers, set @code{BOOT_CFLAGS} on the command line when doing
@samp{make bootstrap}. Non-default optimization flags are less well
To build a cross compiler, we first recommend building and installing a
native compiler. You can then use the native GCC compiler to build the
-cross compiler.
+cross compiler. The installed native compiler needs to be GCC version
+2.95 or later.
Assuming you have already installed a native copy of GCC and configured
your cross compiler, issue the command @command{make}, which performs the
@section Building the Ada compiler
In order to build GNAT, the Ada compiler, you need a working GNAT
-compiler, since the Ada front end is written in Ada (with some
+compiler (GNAT version 3.13 or later, or GCC version 3.1 or later),
+since the Ada front end is written in Ada (with some
GNAT-specific extensions), and GNU make.
However, you do not need a full installation of GNAT, just the GNAT
detect the driver automatically if it has got a common name such as
@command{gcc} or @command{gnatgcc}. Of course, you still need a working
C compiler (the compiler driver can be different or not).
+@command{configure} does not test whether the GNAT installation works
+and has a sufficiently recent version; if too old a GNAT version is
+installed, the build will fail unless @option{--enable-languages} is
+used to disable building the Ada front end.
Additional build tools (such as @command{gnatmake}) or a working GNAT
run-time library installation are usually @emph{not} required. However,
-if you want to boostrap the compiler using a minimal version of GNAT,
+if you want to bootstrap the compiler using a minimal version of GNAT,
you have to issue the following commands before invoking @samp{make
-boostrap} (this assumes that you start with an unmodified and consistent
+bootstrap} (this assumes that you start with an unmodified and consistent
source distribution):
@example
@end example
At the moment, the GNAT library and several tools for GNAT are not built
-by @samp{make bootstrap}. You have to invoke
+by @samp{make bootstrap}. You have to invoke
@samp{make gnatlib_and_tools} in the @file{@var{objdir}/gcc}
subdirectory before proceeding with the next steps.
@example
cd @var{objdir}
- @var{srcdir}/configure --enable-languages=c,ada
+ @var{srcdir}/configure --enable-languages=c,ada
cd @var{srcdir}/gcc/ada
touch treeprs.ads [es]info.h nmake.ad[bs]
- cd @var{objdir}
+ cd @var{objdir}
make bootstrap
cd gcc
make gnatlib_and_tools
build feature described in the previous section.
@html
-<hr>
+<hr />
<p>
@end html
@ifhtml
@node Testing, Final install, Building, Installing GCC
@end ifnothtml
@ifset testhtml
-@html
-<h1 align="center">Installing GCC: Testing</h1>
-@end html
@ifnothtml
@chapter Installing GCC: Testing
@end ifnothtml
@cindex Installing GCC: Testing
@cindex Testsuite
-Before you install GCC, you might wish to run the testsuite. This
-step is optional and may require you to download additional software.
+Before you install GCC, we encourage you to run the testsuites and to
+compare your results with results from a similar configuration that have
+been submitted to the
+@uref{http://gcc.gnu.org/ml/gcc-testresults/,,gcc-testresults mailing list}.
+This step is optional and may require you to download additional software,
+but it can give you confidence in your new GCC installation or point out
+problems before you install and start using your new GCC.
First, you must have @uref{download.html,,downloaded the testsuites}.
-The full distribution contains testsuites; only if you downloaded the
-``core'' compiler plus any front ends, you do not have the testsuites.
+These are part of the full distribution, but if you downloaded the
+``core'' compiler plus any front ends, you must download the testsuites
+separately.
-Second, you must have a @uref{http://www.gnu.org/software/dejagnu/,,current version of DejaGnu} installed;
+Second, you must have the testing tools installed. This includes
+a @uref{http://www.gnu.org/software/dejagnu/,,current version of DejaGnu};
dejagnu 1.3 is not sufficient.
+It also includes Tcl and Expect; the DejaGnu site has links to these.
Now you may need specific preparations:
distribution as possible, including the C, C++, Objective-C and Fortran
compilers as well as the C++ and Java runtime libraries.
+While running the testsuite, DejaGnu might emit messages resembling
+@samp{WARNING: Couldn't find the global config file.} or
+@samp{WARNING: Couldn't find tool init file}.
+These messages are harmless and do not affect the validity of the tests.
+
@section How can I run the test suite on selected tests?
As a first possibility to cut down the number of tests that are run it is
output of @samp{make check} into a file and look at the
@samp{Running @dots{} .exp} lines.
+To run only the tests for a library, run @samp{make check} from the
+the library's testsuite in a subdirectory of the object directory:
+@file{libstdc++-v3/testsuite} or @file{libcgj/testsuite}.
+
+@section Additional testing for Java Class Libraries
+
+The @uref{http://sources.redhat.com/mauve/,,Mauve Project} provides
+a suite of tests for the Java Class Libraries. This suite can be run
+as part of libgcj testing by placing the Mauve tree within the libjava
+testsuite at @file{libjava/testsuite/libjava.mauve/mauve}, or by
+specifying the location of that tree when invoking @samp{make}, as in
+@samp{make MAUVEDIR=~/mauve check}.
+
+@uref{http://www-124.ibm.com/developerworks/oss/cvs/jikes/~checkout~/jacks/jacks.html,,Jacks}
+is a free test suite that tests Java compiler front ends. This suite
+can be run as part of libgcj testing by placing the Jacks tree within
+the libjava testsuite at @file{libjava/testsuite/libjava.jacks/jacks}.
+
@section How to interpret test results
After the testsuite has run you'll find various @file{*.sum} and @file{*.log}
few failing testcases are possible even on released versions and you
should look here first if you think your results are unreasonable.
+@html
+<hr />
+<p>
+@end html
+@ifhtml
+@uref{./index.html,,Return to the GCC Installation page}
+@end ifhtml
@end ifset
@c ***Final install***********************************************************
@node Final install, , Testing, Installing GCC
@end ifnothtml
@ifset finalinstallhtml
-@html
-<h1 align="center">Installing GCC: Final installation</h1>
-@end html
@ifnothtml
@chapter Installing GCC: Final installation
@end ifnothtml
cd @var{objdir}; make install
@end example
+We strongly recommend to install into a target directory where there is
+no previous version of GCC present.
+
That step completes the installation of GCC; user level binaries can
be found in @file{@var{prefix}/bin} where @var{prefix} is the value you
specified with the @option{--prefix} to configure (or @file{/usr/local}
parts of the compiler in @file{@var{libdir}/gcc-lib}; documentation in
info format in @file{@var{infodir}} (normally @file{@var{prefix}/info}).
-If you built a released version of GCC then if you don't mind, please
-quickly review the build status page for
-@uref{http://gcc.gnu.org/gcc-3.0/buildstat.html,,3.0} or
-@uref{http://gcc.gnu.org/gcc-2.95/buildstat.html,,2.95}.
-If your system is not listed, send a note to
+If you built a released version of GCC using @samp{make bootstrap} then please
+quickly review the build status page for your release, available from
+@uref{http://gcc.gnu.org/buildstat.html}.
+If your system is not listed for the version of GCC that you built,
+send a note to
@email{gcc@@gcc.gnu.org} indicating
that you successfully built and installed GCC.
+Include the following information:
+
+@itemize @bullet
+@item
+Output from running @file{@var{srcdir}/config.guess}. Do not send us
+that file itself, just the one-line output from running it.
-Include the output from running @file{@var{srcdir}/config.guess}. (Do
-not send us the @file{config.guess} file itself, just the one-line output from
-running it!) Also specify which version you built.
-If the build was for GNU/Linux, also include the distribution name and version
-(e.g., Red Hat 7.1 or Debian 2.2.3, available from @file{/etc/issue})
-and the version of glibc you used; for RPM-based systems like Red Hat,
+@item
+The output of @samp{gcc -v} for your newly installed gcc.
+This tells us which version of GCC you built and the options you passed to
+configure.
+
+@item
+Whether you enabled all languages or a subset of them. If you used a
+full distribution then this information is part of the configure
+options in the output of @samp{gcc -v}, but if you downloaded the
+``core'' compiler plus additional front ends then it isn't apparent
+which ones you built unless you tell us about it.
+
+@item
+If the build was for GNU/Linux, also include:
+@itemize @bullet
+@item
+The distribution name and version (e.g., Red Hat 7.1 or Debian 2.2.3);
+this information should be available from @file{/etc/issue}.
+
+@item
+The version of the Linux kernel, available from @samp{uname --version}
+or @samp{uname -a}.
+
+@item
+The version of glibc you used; for RPM-based systems like Red Hat,
Mandrake, and SuSE type @samp{rpm -q glibc} to get the glibc version,
and on systems like Debian and Progeny use @samp{dpkg -l libc6}.
+@end itemize
+For other systems, you can include similar information if you think it is
+relevant.
+
+@item
+Any other information that you think would be useful to people building
+GCC on the same configuration. The new entry in the build status list
+will include a link to the archived copy of your message.
+@end itemize
We'd also like to know if the
@ifnothtml
@uref{../bugs.html,,bug reporting guidelines}.
If you want to print the GCC manuals, do @samp{cd @var{objdir}; make
-dvi}. You will need to have @command{texi2dvi} (version at least 4.0)
+dvi}. You will need to have @command{texi2dvi} (version at least 4.2)
and @TeX{} installed. This creates a number of @file{.dvi} files in
subdirectories of @file{@var{objdir}}; these may be converted for
printing with programs such as @command{dvips}. You can also
recent version of GCC@.
@html
-<hr>
+<hr />
<p>
@end html
@ifhtml
@node Binaries, Specific, Installing GCC, Top
@end ifnothtml
@ifset binarieshtml
-@html
-<h1 align="center">Installing GCC: Binaries</h1>
-@end html
@ifnothtml
@chapter Installing GCC: Binaries
@end ifnothtml
AIX:
@itemize
@item
-@uref{http://freeware.bull.net,,Bull's Freeware and Shareware Archive for AIX};
+@uref{http://www.bullfreeware.com,,Bull's Freeware and Shareware Archive for AIX};
@item
-@uref{http://aixpdslib.seas.ucla.edu,,UCLA Software Library for AIX};
+@uref{http://aixpdslib.seas.ucla.edu,,UCLA Software Library for AIX}.
@end itemize
@item
-DOS---@uref{http://www.delorie.com/djgpp/,,DJGPP};
+DOS---@uref{http://www.delorie.com/djgpp/,,DJGPP}.
+
+@item
+Hitachi H8/300[HS]---@uref{http://h8300-hms.sourceforge.net/,,GNU
+Development Tools for the Hitachi H8/300[HS] Series}.
@item
HP-UX:
@item
@uref{http://www.sco.com/skunkware/devtools/index.html#gcc,,SCO
-OpenServer/Unixware};
+OpenServer/Unixware}.
@item
-Solaris 2 (SPARC, Intel)---@uref{http://www.sunfreeware.com/,,Sunfreeware};
+Sinix/Reliant Unix---@uref{ftp://ftp.siemens.de/sni/mr/pd/gnu/gcc,,Siemens}.
+
+@item
+Solaris 2 (SPARC, Intel)---@uref{http://www.sunfreeware.com/,,Sunfreeware}.
@item
-SGI---@uref{http://freeware.sgi.com/,,SGI Freeware};
+SGI---@uref{http://freeware.sgi.com/,,SGI Freeware}.
@item
Windows 95, 98, and NT:
@item
The @uref{http://sources.redhat.com/cygwin/,,Cygwin} project;
@item
-@uref{http://www.xraylith.wisc.edu/~khan/software/gnu-win32/,,GNU Win32}
-related projects by Mumit Khan.
+The @uref{http://www.mingw.org/,,MinGW} project.
@end itemize
@item
-@uref{ftp://ftp.thewrittenword.com/packages/free/by-name/gcc-2.95.2/,,The
+@uref{ftp://ftp.thewrittenword.com/packages/free/by-name/,,The
Written Word} offers binaries for Solaris 2.5.1, 2.6, 2.7/SPARC, 2.7/Intel,
IRIX 6.2, 6.5, Digital UNIX 4.0D, HP-UX 10.20, and HP-UX 11.00.
-@item
-Hitachi H8/300[HS]---@uref{http://h8300-hms.sourceforge.net/,,GNU
-Development Tools for the Hitachi H8/300[HS] Series}
-
@end itemize
In addition to those specific offerings, you can get a binary
works.
@html
-<hr>
+<hr />
<p>
@end html
@ifhtml
@c ***Specific****************************************************************
@ifnothtml
@comment node-name, next, previous, up
-@node Specific, Concept Index, Binaries, Top
+@node Specific, Old, Binaries, Top
@end ifnothtml
@ifset specifichtml
-@html
-<h1 align="center">Host/target specific installation notes for GCC</h1>
-@end html
@ifnothtml
@chapter Host/target specific installation notes for GCC
@end ifnothtml
Please read this document carefully @emph{before} installing the
GNU Compiler Collection on your machine.
-Lists of successful builds for released versions of GCC are
-available at our web pages for
-@uref{http://gcc.gnu.org/gcc-3.0/buildstat.html,,3.0}
-and
-@uref{http://gcc.gnu.org/gcc-2.95/buildstat.html,,2.95}.
-These lists are updated as new information becomes available.
-
@ifhtml
@itemize
@item
-@uref{#1750a-*-*,,1750a-*-*}
-@item
-@uref{#a29k,,a29k}
-@item
-@uref{#a29k-*-bsd,,a29k-*-bsd}
-@item
@uref{#alpha*-*-*,,alpha*-*-*}
@item
@uref{#alpha*-dec-osf*,,alpha*-dec-osf*}
@item
@uref{#arm*-*-linux-gnu,,arm*-*-linux-gnu}
@item
-@uref{#arm-*-riscix,,arm-*-riscix}
-@item
@uref{#avr,,avr}
@item
@uref{#c4x,,c4x}
@item
@uref{#dsp16xx,,dsp16xx}
@item
-@uref{#elxsi-elxsi-bsd,,elxsi-elxsi-bsd}
-@item
@uref{#*-*-freebsd*,,*-*-freebsd*}
@item
@uref{#h8300-hms,,h8300-hms}
@item
@uref{#*-*-linux-gnu,,*-*-linux-gnu}
@item
-@uref{#ix86-*-linux*oldld,,i?86-*-linux*oldld}
-@item
@uref{#ix86-*-linux*aout,,i?86-*-linux*aout}
@item
@uref{#ix86-*-linux*,,i?86-*-linux*}
@item
@uref{#ix86-*-udk,,i?86-*-udk}
@item
-@uref{#ix86-*-isc,,i?86-*-isc}
-@item
@uref{#ix86-*-esix,,i?86-*-esix}
@item
-@uref{#ix86-ibm-aix,,i?86-ibm-aix}
-@item
-@uref{#ix86-sequent-bsd,,i?86-sequent-bsd}
-@item
-@uref{#ix86-sequent-ptx1*,,i?86-sequent-ptx1*, i?86-sequent-ptx2*}
-@item
-@uref{#ix86-*-sysv3*,,i?86-*-sysv3*}
-@item
-@uref{#i860-intel-osf*,,i860-intel-osf*}
-@item
@uref{#ia64-*-linux,,ia64-*-linux}
@item
@uref{#*-lynx-lynxos,,*-lynx-lynxos}
@item
@uref{#*-ibm-aix*,,*-ibm-aix*}
@item
+@uref{#ip2k-*-elf,,ip2k-*-elf}
+@item
@uref{#m32r-*-elf,,m32r-*-elf}
@item
@uref{#m68000-hp-bsd,,m68000-hp-bsd}
@item
@uref{#m6812-elf,,m6812-elf}
@item
-@uref{#m68k-altos,,m68k-altos}
-@item
-@uref{#m68k-apple-aux,,m68k-apple-aux}
-@item
@uref{#m68k-att-sysv,,m68k-att-sysv}
@item
-@uref{#m68k-bull-sysv,,m68k-bull-sysv}
-@item
-@uref{#m68k-crds-unox,,m68k-crds-unox}
+@uref{#m68k-crds-unos,,m68k-crds-unos}
@item
@uref{#m68k-hp-hpux,,m68k-hp-hpux}
@item
-@uref{#m68k-*-nextstep*,,m68k-*-nextstep*}
-@item
@uref{#m68k-ncr-*,,m68k-ncr-*}
@item
@uref{#m68k-sun,,m68k-sun}
@item
@uref{#m68k-sun-sunos4.1.1,,m68k-sun-sunos4.1.1}
@item
-@uref{#m88k-*-svr3,,m88k-*-svr3}
-@item
-@uref{#m88k-*-dgux,,m88k-*-dgux}
-@item
-@uref{#m88k-tektronix-sysv3,,m88k-tektronix-sysv3}
-@item
@uref{#mips-*-*,,mips-*-*}
@item
-@uref{#mips-dec-*,,mips-dec-*}
-@item
-@uref{#mips-mips-bsd,,mips-mips-bsd}
-@item
-@uref{#mips-mips-riscos*,,mips-mips-riscos*}
-@item
-@uref{#mips-sgi-irix4,,mips-sgi-irix4}
-@item
@uref{#mips-sgi-irix5,,mips-sgi-irix5}
@item
@uref{#mips-sgi-irix6,,mips-sgi-irix6}
@item
-@uref{#mips-sony-sysv,,mips-sony-sysv}
-@item
-@uref{#ns32k-encore,,ns32k-encore}
-@item
-@uref{#ns32k-*-genix,,ns32k-*-genix}
-@item
-@uref{#ns32k-sequent,,ns32k-sequent}
-@item
-@uref{#ns32k-utek,,ns32k-utek}
-@item
@uref{#powerpc*-*-*,,powerpc*-*-*, powerpc-*-sysv4}
@item
@uref{#powerpc-*-darwin*,,powerpc-*-darwin*}
@item
@uref{#powerpcle-*-winnt,,powerpcle-*-winnt, powerpcle-*-pe}
@item
-@uref{#romp-*-aos,,romp-*-aos, romp-*-mach}
-@item
-@uref{#s390-*-linux*}
+@uref{#s390-*-linux*,,s390-*-linux*}
@item
-@uref{#s390x-*-linux*}
+@uref{#s390x-*-linux*,,s390x-*-linux*}
@item
@uref{#*-*-solaris2*,,*-*-solaris2*}
@item
@item
@uref{#sparc-sun-solaris2.7,,sparc-sun-solaris2.7}
@item
-@uref{#*-*-solaris2.8,,*-*-solaris2.8}
-@item
@uref{#sparc-sun-sunos4*,,sparc-sun-sunos4*}
@item
@uref{#sparc-unknown-linux-gnulibc1,,sparc-unknown-linux-gnulibc1}
@item
+@uref{#sparc-*-linux*,,sparc-*-linux*}
+@item
@uref{#sparc64-*-*,,sparc64-*-*}
@item
+@uref{#sparcv9-*-solaris2*,,sparcv9-*-solaris2*}
+@item
@uref{#*-*-sysv*,,*-*-sysv*}
@item
@uref{#vax-dec-ultrix,,vax-dec-ultrix}
@item
-@uref{#we32k-*-*,,we32k-*-*}
+@uref{#*-*-vxworks*,,*-*-vxworks*}
+@item
+@uref{#xtensa-*-elf,,xtensa-*-elf}
+@item
+@uref{#xtensa-*-linux*,,xtensa-*-linux*}
@item
@uref{#windows,,Microsoft Windows}
@item
@html
<!-- -------- host/target specific issues start here ---------------- -->
-<hr>
-@end html
-@heading @anchor{1750a-*-*}1750a-*-*
-MIL-STD-1750A processors.
-
-The MIL-STD-1750A cross configuration produces output for
-@code{as1750}, an assembler/linker available under the GNU General Public
-License for the 1750A@. @code{as1750} can be obtained at
-@uref{ftp://ftp.fta-berlin.de/pub/crossgcc/1750gals/}.
-A similarly licensed simulator for
-the 1750A is available from same address.
-
-You should ignore a fatal error during the building of @samp{libgcc}
-(@samp{libgcc} is not yet implemented for the 1750A@.)
-
-The @code{as1750} assembler requires the file @file{ms1750.inc}, which is
-found in the directory @file{gcc/config/1750a}.
-
-GCC produced the same sections as the Fairchild F9450 C Compiler,
-namely:
-
-@table @code
-@item Normal
-The program code section.
-
-@item Static
-The read/write (RAM) data section.
-
-@item Konst
-The read-only (ROM) constants section.
-
-@item Init
-Initialization section (code to copy KREL to SREL)@.
-@end table
-
-The smallest addressable unit is 16 bits (@code{BITS_PER_UNIT} is 16). This
-means that type @code{char} is represented with a 16-bit word per character.
-The 1750A's ``Load/Store Upper/Lower Byte'' instructions are not used by
-GCC@.
-
-@html
-</p>
-<hr>
-@end html
-@heading @anchor{a29k}a29k
-AMD Am29k-family processors. These are normally used in embedded
-applications. There are no standard Unix configurations.
-This configuration
-corresponds to AMD's standard calling sequence and binary interface
-and is compatible with other 29k tools.
-
-You may need to make a variant of the file @file{a29k.h} for your
-particular configuration.
-
-@html
-</p>
-<hr>
-@end html
-@heading @anchor{a29k-*-bsd}a29k-*-bsd
-AMD Am29050 used in a system running a variant of BSD Unix.
-
-@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{alpha*-*-*}alpha*-*-*
shared libraries.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{alpha*-dec-osf*}alpha*-dec-osf*
Systems using processors that implement the DEC Alpha architecture and
are running the DEC/Compaq Unix (DEC OSF/1, Digital UNIX, or Compaq
Tru64 UNIX) operating system, for example the DEC Alpha AXP systems.
+As of GCC 3.2, versions before @code{alpha*-dec-osf4} are no longer
+supported. (These are the versions which identify themselves as DEC
+OSF/1.)
+
+In Digital Unix V4.0, virtual memory exhausted bootstrap failures
+may be fixed by configuring with @option{--with-gc=simple},
+reconfiguring Kernel Virtual Memory and Swap parameters
+per the @command{/usr/sbin/sys_check} Tuning Suggestions,
+or applying the patch in
+@uref{http://gcc.gnu.org/ml/gcc/2002-08/msg00822.html}.
+
In Tru64 UNIX V5.1, Compaq introduced a new assembler that does not
currently (2001-06-13) work with @command{mips-tfile}. As a workaround,
we need to use the old assembler, invoked via the barely documented
@option{--with-gnu-as} or @option{--with-gnu-ld}.
The @option{--enable-threads} options isn't supported yet. A patch is
-in preparation for a future release. The Java runtime library has been
-reported to work on Tru64 UNIX V4.0F, V5.0, and V5.1, so you may try
-@option{--enable-libgcj} and report your results.
+in preparation for a future release.
GCC writes a @samp{.verstamp} directive to the assembler output file
unless it is built as a cross-compiler. It gets the version to use from
provide a fix shortly.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{alphaev5-cray-unicosmk*}alphaev5-cray-unicosmk*
Cray T3E systems running Unicos/Mk.
simplest way to do so is by providing @option{--with-as} and
@option{--with-ld} to @file{configure}, e.g.@:
-@samp{configure --with-as=/opt/ctl/bin/cam --with-ld=/opt/ctl/bin/cld
---enable-languages=c}
+@example
+ configure --with-as=/opt/ctl/bin/cam --with-ld=/opt/ctl/bin/cld \
+ --enable-languages=c
+@end example
The comparison test during @samp{make bootstrap} fails on Unicos/Mk
because the assembler inserts timestamps into object files. You should
failure.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{arc-*-elf}arc-*-elf
Argonaut ARC processor.
This configuration is intended for embedded systems.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{arm-*-aout}arm-*-aout
Advanced RISC Machines ARM-family processors. These are often used in
configuration.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{arm-*-elf}arm-*-elf
This configuration is intended for embedded systems.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{arm*-*-linux-gnu}arm*-*-linux-gnu
We require GNU binutils 2.10 or newer.
@html
-</p>
-<hr>
-@end html
-@heading @anchor{arm-*-riscix}arm-*-riscix
-The ARM2 or ARM3 processor running RISC iX, Acorn's port of BSD Unix.
-If you are running a version of RISC iX prior to 1.2 then you must
-specify the version number during configuration. Note that the
-assembler shipped with RISC iX does not support stabs debugging
-information; a new version of the assembler, with stabs support
-included, is now available from Acorn and via ftp
-@uref{ftp://ftp.acorn.com/pub/riscix/as+xterm.tar.Z}. To enable stabs
-debugging, pass @option{--with-gnu-as} to configure.
-
-You will need to install GNU @command{sed} before you can run configure.
-
-@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{avr}avr
@itemize @bullet
@item
+@uref{http://www.openavr.org,,http://www.openavr.org}
+@item
@uref{http://home.overta.ru/users/denisc,,http://home.overta.ru/users/denisc}
@item
-@uref{http://www.itnet.pl/amelektr/avr,,http://www.itnet.pl/amelektr/avr}
+@uref{http://www.amelek.gda.pl/avr,,http://www.amelek.gda.pl/avr}
@end itemize
-We @emph{strongly} recommend using binutils 2.11 or newer.
+We @emph{strongly} recommend using binutils 2.13 or newer.
The following error:
@example
indicates that you should upgrade to a newer version of the binutils.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{c4x}c4x
@end itemize
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{cris}CRIS
@uref{http://developer.axis.com/}.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{dos}DOS
and includes all the necessary compilation tools and libraries.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{dsp16xx}dsp16xx
A port to the AT&T DSP1610 family of processors.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{*-*-freebsd*}*-*-freebsd*
The version of binutils installed in @file{/usr/bin} is known to work unless
otherwise specified in any per-architecture notes. However, binutils
-2.11 is known to improve overall testsuite results.
+2.12.1 or greater is known to improve overall testsuite results.
+
+FreeBSD 1 is no longer supported in GCC 3.2.
-For FreeBSD 1, FreeBSD 2 or any mutant a.out versions of FreeBSD 3: All
+For FreeBSD 2 or any mutant a.out versions of FreeBSD 3: All
configuration support and files as shipped with GCC 2.95 are still in
place. FreeBSD 2.2.7 has been known to bootstrap completely; however,
it is unknown which version of binutils was used (it is assumed that it
particular, @option{--enable-threads} is now configured by default.
However, as a general user, do not attempt to replace the system
compiler with this release. Known to bootstrap and check with good
-results on FreeBSD 3.0, 3.4, 4.0, 4.2, 4.3 and 5-CURRENT@.
-
-At this time, @option{--enable-threads} is not compatible with
-@option{--enable-libgcj} on FreeBSD@.
-
-@html
-</p>
-<hr>
-@end html
-@heading @anchor{elxsi-elxsi-bsd}elxsi-elxsi-bsd
-The Elxsi's C compiler has known limitations that prevent it from
-compiling GCC@. Please contact @email{mrs@@wrs.com} for more details.
-
-@html
-</p>
-<hr>
+results on FreeBSD 3.0, 3.4, 4.0, 4.2, 4.3, 4.4, 4.5-STABLE and 5-CURRENT@.
+
+In principle, @option{--enable-threads} is now compatible with
+@option{--enable-libgcj} on FreeBSD@. However, it has only been built
+and tested on @samp{i386-*-freebsd4.5} and @samp{alpha-*-freebsd5.0}.
+The static
+library may be incorrectly built (symbols are missing at link time).
+There is a rare timing-based startup hang (probably involves an
+assumption about the thread library). Multi-threaded boehm-gc (required for
+libjava) exposes severe threaded signal-handling bugs on FreeBSD before
+4.5-RELEASE. The alpha port may not fully bootstrap without some manual
+intervention: @command{gcjh} will crash with a floating-point exception while
+generating @file{java/lang/Double.h} (just copy the version built on
+@samp{i386-*-freebsd*} and rerun the top-level @command{gmake} with no
+arguments and it
+should properly complete the bootstrap). Other CPU architectures
+supported by FreeBSD will require additional configuration tuning in, at
+the very least, both boehm-gc and libffi.
+
+Shared @file{libgcc_s.so} is now built and installed by default.
+
+@html
+<hr />
@end html
@heading @anchor{h8300-hms}h8300-hms
Hitachi H8/300 series of processors.
longer a multiple of 2 bytes.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{hppa*-hp-hpux*}hppa*-hp-hpux*
@uref{./configure.html#with-gnu-as,,@option{--with-gnu-as}} and
@option{--with-as=@dots{}} options.
-If you wish to use pa-risc 2.0 architecture support, you must use either
-the HP assembler, gas/binutils 2.11 or a recent
+If you wish to use the pa-risc 2.0 architecture support with a 32-bit
+runtime, you must use either the HP assembler, gas/binutils 2.11 or newer,
+or a recent
@uref{ftp://sources.redhat.com/pub/binutils/snapshots,,snapshot of gas}.
+There are two default scheduling models for instructions. These are
+PROCESSOR_7100LC and PROCESSOR_8000. They are selected from the pa-risc
+architecture specified for the target machine when configuring.
+PROCESSOR_8000 is the default. PROCESSOR_7100LC is selected when
+the target is a @samp{hppa1*} machine.
+
+The PROCESSOR_8000 model is not well suited to older processors. Thus,
+it is important to completely specify the machine architecture when
+configuring if you want a model other than PROCESSOR_8000. The macro
+TARGET_SCHED_DEFAULT can be defined in BOOT_CFLAGS if a different
+default scheduling model is desired.
+
More specific information to @samp{hppa*-hp-hpux*} targets follows.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{hppa*-hp-hpux9}hppa*-hp-hpux9
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{hppa*-hp-hpux10}hppa*-hp-hpux10
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{hppa*-hp-hpux11}hppa*-hp-hpux11
-GCC 3.0 supports HP-UX 11. You must use GNU binutils 2.11 or above on
-this platform.
+GCC 3.0 and up support HP-UX 11. On 64-bit capable systems, there
+are two distinct ports. The @samp{hppa2.0w-hp-hpux11*} port generates
+code for the 32-bit pa-risc runtime architecture. It uses the HP
+linker and is currently the default selected by config.guess. The
+optional @samp{hppa64-hp-hpux11*} port generates 64-bit code for the
+pa-risc 2.0 architecture. It must be explicitly selected using the
+@samp{--host=hppa64-hp-hpux11*} configure option. Different prefixes
+must be used if both ports are to be installed on the same system.
+
+You must use GNU binutils 2.11 or above with the 32-bit port. Thread
+support is not currently implemented, so @option{--enable-threads} does
+not work. See:
+
+@itemize
+@item @uref{http://gcc.gnu.org/ml/gcc-prs/2002-01/msg00551.html}
+@item @uref{http://gcc.gnu.org/ml/gcc-bugs/2002-01/msg00663.html}
+@end itemize
+
+GCC 2.95.x is not supported under HP-UX 11 and cannot be used to
+compile GCC 3.0 and up. Refer to @uref{binaries.html,,binaries} for
+information about obtaining precompiled GCC binaries for HP-UX.
+
+GNU binutils 2.13 or later is recommended with the 64-bit port.
+The HP assembler has many limitations and is not recommended. For
+example, it does not support weak symbols or alias definitions.
+As a result, explicit template instantiations are required when
+using C++. Either the HP or GNU linker can be used but it may be
+necessary to use the GNU linker when dwarf2 exception support is
+implemented.
+
+There are several possible approaches to building the distribution.
+Binutils can be built first using the HP tools. Then, the GCC
+distribution can be built. The second approach is to build GCC
+first using the HP tools, then build binutils, then rebuild GCC.
+There have been problems with various binary distributions, so
+it is best not to start from a binary distribution.
+
+When starting with a HP compiler, it is preferable to use the ANSI
+compiler as the bundled compiler only supports traditional C.
+Bootstrapping with the bundled compiler is tested infrequently and
+problems often arise because of the subtle differences in semantics
+between traditional and ISO C.
+
+This port still is undergoing significant development.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{i370-*-*}i370-*-*
This port is very preliminary and has many known bugs. We hope to
have a higher-quality port for this machine soon.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{*-*-linux-gnu}*-*-linux-gnu
applied in the GCC source tree, fixes the compatibility problems.
@html
-</p>
@end html
@html
2.2.3 with GCC 3.0, just do not try to recompile it.
@html
-</p>
-<hr>
-@end html
-@heading @anchor{ix86-*-linux*oldld}i?86-*-linux*oldld
-Use this configuration to generate @file{a.out} binaries on Linux-based
-GNU systems if you do not have gas/binutils version 2.5.2 or later
-installed. This is an obsolete configuration.
-
-@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{ix86-*-linux*aout}i?86-*-linux*aout
Use this configuration to generate @file{a.out} binaries on Linux-based
gas/binutils version 2.5.2 or later.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{ix86-*-linux*}i?86-*-linux*
found on @uref{http://www.bitwizard.nl/sig11/,,www.bitwizard.nl}.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{ix86-*-sco}i?86-*-sco
Compilation with RCC is recommended. Also, it may be a good idea to
link with GNU malloc instead of the malloc that comes with the system.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{ix86-*-sco3.2v4}i?86-*-sco3.2v4
Use this configuration for SCO release 3.2 version 4.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{ix86-*-sco3.2v5*}i?86-*-sco3.2v5*
Use this for the SCO OpenServer Release 5 family of operating systems.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{ix86-*-udk}i?86-*-udk
building a cross compiler. The easiest way to do this is with a configure
command like this:
-@samp{CC=/udk/usr/ccs/bin/cc @var{/your/path/to}/gcc/configure
---host=i686-pc-udk --target=i686-pc-udk --program-prefix=udk-}
+@example
+ CC=/udk/usr/ccs/bin/cc @var{/your/path/to}/gcc/configure \
+ --host=i686-pc-udk --target=i686-pc-udk --program-prefix=udk-
+@end example
@emph{You should substitute @samp{i686} in the above command with the appropriate
processor for your host.}
@html
-</p>
-<hr>
-@end html
-@heading @anchor{ix86-*-isc}i?86-*-isc
-It may be a good idea to link with GNU malloc instead of the malloc that
-comes with the system.
-
-In ISC version 4.1, @command{sed} core dumps when building
-@file{deduced.h}. Use the version of @command{sed} from version 4.0.
-
-@html
-</p>
-<hr>
-@end html
-@heading @anchor{ix86-*-esix}i?86-*-esix
-It may be good idea to link with GNU malloc instead of the malloc that
-comes with the system.
-
-@html
-</p>
-<hr>
-@end html
-@heading @anchor{ix86-ibm-aix}i?86-ibm-aix
-You need to use GAS version 2.1 or later, and LD from
-GNU binutils version 2.2 or later.
-
-@html
-</p>
-<hr>
-@end html
-@heading @anchor{ix86-sequent-bsd}i?86-sequent-bsd
-Go to the Berkeley universe before compiling.
-
-@html
-</p>
-<hr>
-@end html
-@heading @anchor{ix86-sequent-ptx1*}i?86-sequent-ptx1*, i?86-sequent-ptx2*
-You must install GNU @command{sed} before running @command{configure}.
-
-@html
-</p>
-<hr>
-@end html
-@heading @anchor{#ix86-*-sysv3*}i?86-*-sysv3*
-The @code{fixproto} shell script may trigger a bug in the system shell.
-If you encounter this problem, upgrade your operating system or
-use @command{bash} (the GNU shell) to run @code{fixproto}.
-
-
-@html
-</p>
-<hr>
-@end html
-@heading @anchor{i860-intel-osf*}i860-intel-osf*
-On the Intel Paragon (an i860 machine), if you are using operating
-system version 1.0, you will get warnings or errors about redefinition
-of @code{va_arg} when you build GCC@.
-
-If this happens, then you need to link most programs with the library
-@file{iclib.a}. You must also modify @file{stdio.h} as follows: before
-the lines
-
-@example
-#if defined(__i860__) && !defined(_VA_LIST)
-#include <va_list.h>
-@end example
-
-@noindent
-insert the line
-
-@example
-#if __PGC__
-@end example
-
-@noindent
-and after the lines
-
-@example
-extern int vprintf(const char *, va_list );
-extern int vsprintf(char *, const char *, va_list );
-#endif
-@end example
-
-@noindent
-insert the line
-
-@example
-#endif /* __PGC__ */
-@end example
-
-These problems don't exist in operating system version 1.1.
-
-@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{ia64-*-linux}ia64-*-linux
IA-64 processor (also known as IPF, or Itanium Processor Family)
ABI changes are expected.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{*-lynx-lynxos}*-lynx-lynxos
LynxOS 2.2 and earlier comes with GCC 1.x already installed as
installed tools, which produce @file{a.out} format executables.
@html
-</p>
-<hr>
+<hr />
<!-- rs6000-ibm-aix*, powerpc-ibm-aix* -->
@end html
@heading @anchor{*-ibm-aix*}*-ibm-aix*
If this error occurs during stage2 or later, then the problem most likely
is the version of Make (see above).
-Binutils 2.10 does not support AIX 4.3. Binutils available from the
-@uref{http://www-1.ibm.com/servers/aix/products/aixos/linux/,,AIX
-Toolbox for Linux: GNU and Open Source tools for AIX};
-website does work. Binutils 2.11 is expected to include AIX 4.3
-support. The GNU Assembler is necessary for @samp{libstdc++} to build. The
-AIX native @command{ld} still is recommended. The native AIX tools do
+The GNU Assembler incorrectly reports that it supports WEAK symbols on
+AIX which causes GCC to try to utilize weak symbol functionality although
+it is not supported on the platform. The native @command{as} and
+@command{ld} still are recommended. The native AIX tools do
interoperate with GCC@.
+Building @file{libstdc++.a} requires a fix for an AIX Assembler bug
+APAR IY26685 (AIX 4.3) or APAR IY25528 (AIX 5.1).
+
+@samp{libstdc++} in GCC 3.2 increments the major version number of the
+shared object and GCC installation places the @file{libstdc++.a}
+shared library in a common location which will overwrite the GCC 3.1
+version of the shared library. Applications either need to be
+re-linked against the new shared library or the GCC 3.1 version of the
+@samp{libstdc++} shared object needs to be available to the AIX
+runtime loader. The GCC 3.1 @samp{libstdc++.so.4} shared object can
+be installed for runtime dynamic loading using the following steps to
+set the @samp{F_LOADONLY} flag in the shared object for @emph{each}
+multilib @file{libstdc++.a} installed:
+
+Extract the shared object from each the GCC 3.1 @file{libstdc++.a}
+archive:
+@example
+ % ar -x libstdc++.a libstdc++.so.4
+@end example
+
+Enable the @samp{F_LOADONLY} flag so that the shared object will be
+available for runtime dynamic loading, but not linking:
+@example
+ % strip -e libstdc++.so.4
+@end example
+
+Archive the runtime-only shared object in the GCC 3.2
+@file{libstdc++.a} archive:
+@example
+ % ar -q libstdc++.a libstdc++.so.4
+@end example
+
Linking executables and shared libraries may produce warnings of
duplicate symbols. The assembly files generated by GCC for AIX always
have included multiple symbol definitions for certain global variable
not prevent the linker from producing a correct library or runnable
executable.
-GCC's exception handling implementation stores process-specific data in
-the shared library which prevents exception handling from working
-correctly on AIX in a default installation. To work around this, the
-shared objects need to be loaded in the process private segment to
-prevent them from being shared and marked read-only. This is
-accomplished on AIX by installing the shared libraries
-(@file{libgcc_s.a} and @file{libstdc++.a}) with file permissions
-disallowing read-other (@samp{chmod a+x,o-r}). If the shared libraries
-have been used, the shared library segment can be cleaned using the
-@samp{/usr/sbin/slibclean} command.
-
AIX 4.3 utilizes a ``large format'' archive to support both 32-bit and
64-bit object modules. The routines provided in AIX 4.3.0 and AIX 4.3.1
to parse archive libraries did not handle the new format correctly.
switch and using the configure option @option{--with-cpu-@var{cpu_type}}.
@html
-</p>
-<hr>
+<hr />
+@end html
+@heading @anchor{ip2k-*-elf}ip2k-*-elf
+Ubicom IP2022 micro controller.
+This configuration is intended for embedded systems.
+There are no standard Unix configurations.
+
+Use @samp{configure --target=ip2k-elf --enable-languages=c} to configure GCC@.
+
+@html
+<hr />
@end html
@heading @anchor{m32r-*-elf}m32r-*-elf
Mitsubishi M32R processor.
This configuration is intended for embedded systems.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{m68000-hp-bsd}m68000-hp-bsd
HP 9000 series 200 running BSD@. Note that the C compiler that comes
to get binaries of GCC for bootstrapping.
@html
-</p>
-<hr>
+<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
-</p>
-<hr>
+<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
-</p>
-<hr>
-@end html
-@heading @anchor{m68k-altos}m68k-altos
-Altos 3068. You must use the GNU assembler, linker and debugger.
-Also, you must fix a kernel bug.
-
-@html
-</p>
-<hr>
-@end html
-@heading @anchor{m68k-apple-aux}m68k-apple-aux
-Apple Macintosh running A/UX@.
-You may configure GCC to use either the system assembler and
-linker or the GNU assembler and linker. You should use the GNU configuration
-if you can, especially if you also want to use G++. You enable
-that configuration with the @option{--with-gnu-as} and @option{--with-gnu-ld}
-options to @code{configure}.
-
-Note the C compiler that comes
-with this system cannot compile GCC@. You can find binaries of GCC
-for bootstrapping on @code{jagubox.gsfc.nasa.gov}.
-You will also a patched version of @file{/bin/ld} there that
-raises some of the arbitrary limits found in the original.
-
-@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{m68k-att-sysv}m68k-att-sysv
AT&T 3b1, a.k.a.@: 7300 PC@. This version of GCC cannot
@uref{ftp://archive.cis.ohio-state.edu/pub/att7300/}.
@html
-</p>
-<hr>
+<hr />
@end html
-@heading @anchor{m68k-bull-sysv}m68k-bull-sysv
-Bull DPX/2 series 200 and 300 with BOS-2.00.45 up to BOS-2.01. GCC works
-either with native assembler or GNU assembler. You can use
-GNU assembler with native COFF generation by providing @option{--with-gnu-as} to
-the configure script or use GNU assembler with stabs-in-COFF encapsulation
-by providing @samp{--with-gnu-as --stabs}. For any problem with the native
-assembler or for availability of the DPX/2 port of GAS, contact
-@email{F.Pierresteguy@@frcl.bull.fr}.
-
-@html
-</p>
-<hr>
-@end html
-@heading @anchor{m68k-crds-unox}m68k-crds-unox
+@heading @anchor{m68k-crds-unos}m68k-crds-unos
Use @samp{configure unos} for building on Unos.
The Unos assembler is named @code{casm} instead of @code{as}. For some
and linking from that library.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{m68k-hp-hpux}m68k-hp-hpux
HP 9000 series 300 or 400 running HP-UX@. HP-UX version 8.0 has a bug in
@html
-</p>
-<hr>
-@end html
-@heading @anchor{m68k-*-nextstep*}m68k-*-nextstep*
-
-Current GCC versions probably do not work on version 2 of the NeXT
-operating system.
-
-On NeXTStep 3.0, the Objective-C compiler does not work, due,
-apparently, to a kernel bug that it happens to trigger. This problem
-does not happen on 3.1.
-
-You absolutely @strong{must} use GNU sed and GNU make on this platform.
-
-
-On NeXTSTEP 3.x where x < 3 the build of GCC will abort during
-stage1 with an error message like this:
-
-@example
- _eh
- /usr/tmp/ccbbsZ0U.s:987:Unknown pseudo-op: .section
- /usr/tmp/ccbbsZ0U.s:987:Rest of line ignored. 1st junk character
- valued 95 (_).
-@end example
-
-The reason for this is the fact that NeXT's assembler for these
-versions of the operating system does not support the @samp{.section}
-pseudo op that's needed for full C++ exception functionality.
-
-As NeXT's assembler is a derived work from GNU as, a free
-replacement that does can be obtained at
-@uref{ftp://ftp.next.peak.org:/next-ftp/next/apps/devtools/as.3.3.NIHS.s.tar.gz,,ftp://ftp.next.peak.org:/next-ftp/next/apps/devtools/as.3.3.NIHS.s.tar.gz}.
-
-If you try to build the integrated C++ & C++ runtime libraries on this system
-you will run into trouble with include files. The way to get around this is
-to use the following sequence. Note you must have write permission to
-the directory @var{prefix} you specified in the configuration process of GCC
-for this sequence to work.
-
-@example
- cd bld-gcc
- make all-texinfo all-bison all-byacc all-binutils all-gas all-ld
- cd gcc
- make bootstrap
- make install-headers-tar
- cd ..
- make bootstrap3
-@end example
-
-@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{m68k-ncr-*}m68k-ncr-*
On the Tower models 4@var{n}0 and 6@var{n}0, by default a process is not
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{m68k-sun}m68k-sun
Sun 3. We do not provide a configuration file to use the Sun FPA by
point traps inherently cannot work with the FPA@.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{m68k-sun-sunos4.1.1}m68k-sun-sunos4.1.1
@html
-</p>
-<hr>
-@end html
-@heading @anchor{m88k-*-svr3}m88k-*-svr3
-Motorola m88k running the AT&T/Unisoft/Motorola V.3 reference port.
-These systems tend to use the Green Hills C, revision 1.8.5, as the
-standard C compiler. There are apparently bugs in this compiler that
-result in object files differences between stage 2 and stage 3. If this
-happens, make the stage 4 compiler and compare it to the stage 3
-compiler. If the stage 3 and stage 4 object files are identical, this
-suggests you encountered a problem with the standard C compiler; the
-stage 3 and 4 compilers may be usable.
-
-It is best, however, to use an older version of GCC for bootstrapping
-if you have one.
-
-@html
-</p>
-<hr>
-@end html
-@heading @anchor{m88k-*-dgux}m88k-*-dgux
-Motorola m88k running DG/UX@. To build 88open BCS native or cross
-compilers on DG/UX, specify the configuration name as
-@samp{m88k-*-dguxbcs} and build in the 88open BCS software development
-environment. To build ELF native or cross compilers on DG/UX, specify
-@samp{m88k-*-dgux} and build in the DG/UX ELF development environment.
-You set the software development environment by issuing
-@samp{sde-target} command and specifying either @samp{m88kbcs} or
-@samp{m88kdguxelf} as the operand.
-
-If you do not specify a configuration name, @file{configure} guesses the
-configuration based on the current software development environment.
-
-@html
-</p>
-<hr>
-@end html
-@heading @anchor{m88k-tektronix-sysv3}m88k-tektronix-sysv3
-Tektronix XD88 running UTekV 3.2e. Do not turn on
-optimization while building stage1 if you bootstrap with
-the buggy Green Hills compiler. Also, the bundled LAI
-System V NFS is buggy so if you build in an NFS mounted
-directory, start from a fresh reboot, or avoid NFS all together.
-Otherwise you may have trouble getting clean comparisons
-between stages.
-
-@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{mips-*-*}mips-*-*
-If you use the 1.31 version of the MIPS assembler (such as was shipped
-with Ultrix 3.1), you will need to use the @option{-fno-delayed-branch} switch
-when optimizing floating point code. Otherwise, the assembler will
-complain when the GCC compiler fills a branch delay slot with a
-floating point instruction, such as @code{add.d}.
-
If on a MIPS system you get an error message saying ``does not have gp
sections for all it's [sic] sectons [sic]'', don't worry about it. This
happens whenever you use GAS with the MIPS linker, but there is not
It would be nice to extend GAS to produce the gp tables, but they are
optional, and there should not be a warning about their absence.
-Users have reported some problems with version 2.0 of the MIPS
-compiler tools that were shipped with Ultrix 4.1. Version 2.10
-which came with Ultrix 4.2 seems to work fine.
-
-Users have also reported some problems with version 2.20 of the
-MIPS compiler tools that were shipped with RISC/os 4.x. The earlier
-version 2.11 seems to work fine.
-
-Some versions of the MIPS linker will issue an assertion failure
-when linking code that uses @code{alloca} against shared
-libraries on RISC-OS 5.0, and DEC's OSF/1 systems. This is a bug
-in the linker, that is supposed to be fixed in future revisions.
-To protect against this, GCC passes @option{-non_shared} to the
-linker unless you pass an explicit @option{-shared} or
-@option{-call_shared} switch.
-
-@heading @anchor{mips-mips-bsd}mips-mips-bsd
-MIPS machines running the MIPS operating system in BSD mode. It's
-possible that some old versions of the system lack the functions
-@code{memcpy}, @code{memmove}, @code{memcmp}, and @code{memset}. If your
-system lacks these, you must remove or undo the definition of
-@code{TARGET_MEM_FUNCTIONS} in @file{mips-bsd.h}.
-
-If you use the MIPS C compiler to bootstrap, it may be necessary
-to increase its table size for switch statements with the
-@option{-Wf,-XNg1500} option. If you use the @option{-O2}
-optimization option, you also need to use @option{-Olimit 3000}.
-Both of these options are automatically generated in the
-@file{Makefile} that the shell script @file{configure} builds.
-If you override the @code{CC} make variable and use the MIPS
-compilers, you may need to add @option{-Wf,-XNg1500 -Olimit 3000}.
-
-@html
-</p>
-<hr>
-@end html
-@heading @anchor{mips-dec-*}mips-dec-*
-MIPS-based DECstations can support three different personalities:
-Ultrix, DEC OSF/1, and OSF/rose. (Alpha-based DECstation products have
-a configuration name beginning with @samp{alpha*-dec}.) To configure GCC
-for these platforms use the following configurations:
-
-@table @samp
-@item mips-dec-ultrix
-Ultrix configuration.
-
-@item mips-dec-osf1
-DEC's version of OSF/1.
-
-@item mips-dec-osfrose
-Open Software Foundation reference port of OSF/1 which uses the
-OSF/rose object file format instead of ECOFF@. Normally, you
-would not select this configuration.
-@end table
-
-If you use the MIPS C compiler to bootstrap, it may be necessary
-to increase its table size for switch statements with the
-@option{-Wf,-XNg1500} option. If you use the @option{-O2}
-optimization option, you also need to use @option{-Olimit 3000}.
-Both of these options are automatically generated in the
-@file{Makefile} that the shell script @file{configure} builds.
-If you override the @code{CC} make variable and use the MIPS
-compilers, you may need to add @option{-Wf,-XNg1500 -Olimit 3000}.
-
-@html
-</p>
-<hr>
-@end html
-@heading @anchor{mips-mips-riscos*}mips-mips-riscos*
-If you use the MIPS C compiler to bootstrap, it may be necessary
-to increase its table size for switch statements with the
-@option{-Wf,-XNg1500} option. If you use the @option{-O2}
-optimization option, you also need to use @option{-Olimit 3000}.
-Both of these options are automatically generated in the
-@file{Makefile} that the shell script @file{configure} builds.
-If you override the @code{CC} make variable and use the MIPS
-compilers, you may need to add @samp{-Wf,-XNg1500 -Olimit 3000}.
-
-MIPS computers running RISC-OS can support four different
-personalities: default, BSD 4.3, System V.3, and System V.4
-(older versions of RISC-OS don't support V.4). To configure GCC
-for these platforms use the following configurations:
-
-@table @samp
-@item mips-mips-riscos@var{rev}
-Default configuration for RISC-OS, revision @var{rev}.
-
-@item mips-mips-riscos@var{rev}bsd
-BSD 4.3 configuration for RISC-OS, revision @var{rev}.
-
-@item mips-mips-riscos@var{rev}sysv4
-System V.4 configuration for RISC-OS, revision @var{rev}.
-
-@html
-</p>
-<hr>
-@end html
-@item mips-mips-riscos@var{rev}sysv
-System V.3 configuration for RISC-OS, revision @var{rev}.
-@end table
-
-The revision @code{rev} mentioned above is the revision of
-RISC-OS to use. You must reconfigure GCC when going from a
-RISC-OS revision 4 to RISC-OS revision 5. This has the effect of
-avoiding a linker bug.
-
-@html
-</p>
-<hr>
-@end html
-@heading @anchor{mips-sgi-irix4}mips-sgi-irix4
-
-In order to compile GCC on an SGI running IRIX 4, the ``c.hdr.lib''
-option must be installed from the CD-ROM supplied from Silicon Graphics.
-This is found on the 2nd CD in release 4.0.1.
-
-On IRIX version 4.0.5F, and perhaps on some other versions as well,
-there is an assembler bug that reorders instructions incorrectly. To
-work around it, specify the target configuration
-@samp{mips-sgi-irix4loser}. This configuration inhibits assembler
-optimization.
-
-In a compiler configured with target @samp{mips-sgi-irix4}, you can turn
-off assembler optimization by using the @option{-noasmopt} option. This
-compiler option passes the option @option{-O0} to the assembler, to
-inhibit reordering.
-
-The @option{-noasmopt} option can be useful for testing whether a problem
-is due to erroneous assembler reordering. Even if a problem does not go
-away with @option{-noasmopt}, it may still be due to assembler
-reordering---perhaps GCC itself was miscompiled as a result.
-
-You may get the following warning on IRIX 4 platforms, it can be safely
-ignored.
-@example
- warning: foo.o does not have gp tables for all its sections.
-@end example
-
-@html
-</p>
-<hr>
-@end html
@heading @anchor{mips-sgi-irix5}mips-sgi-irix5
This configuration has considerable problems, which will be fixed in a
optimization option, you also need to use @option{-Olimit 3000}.
To enable debugging under IRIX 5, you must use GNU @command{as} 2.11.2
-or later,
+or later,
and use the @option{--with-gnu-as} configure option when configuring GCC.
GNU @command{as} is distributed as part of the binutils package.
-When using release 2.11.2, you need to apply a patch
+When using release 2.11.2, you need to apply a patch
@uref{http://sources.redhat.com/ml/binutils/2001-07/msg00352.html,,http://sources.redhat.com/ml/binutils/2001-07/msg00352.html}
which will be included in the next release of binutils.
not have GNU @command{make} available.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{mips-sgi-irix6}mips-sgi-irix6
should set the environment variable @env{CC} to @samp{cc -n32}
before configuring GCC@.
+If you want the resulting @command{gcc} to run on old 32-bit systems
+with the MIPS R4400 CPU, you need to ensure that only code for the mips3
+instruction set architecture (ISA) is generated. While GCC 3.x does
+this correctly, both GCC 2.95 and SGI's MIPSpro @command{cc} may change
+the ISA depending on the machine where GCC is built. Using one of them
+as the bootstrap compiler may result in mips4 code, which won't run at
+all on mips3-only systems. For the test program above, you should see:
+
+@example
+test.o: ELF N32 MSB mips-3 @dots{}
+@end example
+
+If you get:
+
+@example
+test.o: ELF N32 MSB mips-4 @dots{}
+@end example
+
+instead, you should set the environment variable @env{CC} to @samp{cc
+-n32 -mips3} or @samp{gcc -mips3} respectively before configuring GCC@.
+
GCC on IRIX 6 is usually built to support both the N32 and N64 ABIs. If
you build GCC on a system that doesn't have the N64 libraries installed,
you need to configure with @option{--disable-multilib} so GCC doesn't
GCC does not correctly pass/return structures which are
smaller than 16 bytes and which are not 8 bytes. The problem is very
involved and difficult to fix. It affects a number of other targets also,
-but IRIX 6 is affected the most, because it is a 64 bit target, and 4 byte
+but IRIX 6 is affected the most, because it is a 64-bit target, and 4 byte
structures are common. The exact problem is that structures are being padded
at the wrong end, e.g.@: a 4 byte structure is loaded into the lower 4 bytes
of the register when it should be loaded into the upper 4 bytes of the
information about using GCC on IRIX platforms.
@html
-</p>
-<hr>
-@end html
-@heading @anchor{mips-sony-sysv}mips-sony-sysv
-Sony MIPS NEWS@. This works in NEWSOS 5.0.1, but not in 5.0.2 (which
-uses ELF instead of COFF)@. Support for 5.0.2 will probably be provided
-soon by volunteers. In particular, the linker does not like the
-code generated by GCC when shared libraries are linked in.
-
-
-@html
-</p>
-<hr>
-@end html
-@heading @anchor{ns32k-encore}ns32k-encore
-Encore ns32000 system. Encore systems are supported only under BSD@.
-
-@html
-</p>
-<hr>
-@end html
-@heading @anchor{ns32k-*-genix}ns32k-*-genix
-National Semiconductor ns32000 system. Genix has bugs in @code{alloca}
-and @code{malloc}; you must get the compiled versions of these from GNU
-Emacs.
-
-@html
-</p>
-<hr>
-@end html
-@heading @anchor{ns32k-sequent}ns32k-sequent
-Go to the Berkeley universe before compiling.
-
-@html
-</p>
-<hr>
-@end html
-@heading @anchor{ns32k-utek}ns32k-utek
-UTEK ns32000 system (``merlin''). The C compiler that comes with this
-system cannot compile GCC; contact @samp{tektronix!reed!mason} to get
-binaries of GCC for bootstrapping.
-
-
-@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{powerpc*-*-*}powerpc-*-*
switch by using the configure option @option{--with-cpu-@var{cpu_type}}.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{powerpc-*-darwin*}powerpc-*-darwin*
PowerPC running Darwin (Mac OS X kernel).
registration required).
Versions of the assembler prior to ``cctools-364'' cannot handle the
-4-argument form of rlwinm and related mask-using instructions. Darwin
+4-argument form of @code{rlwinm} and related mask-using instructions. Darwin
1.3 (Mac OS X 10.0) uses cctools-353 for instance. To get cctools-364,
check out @file{cctools} with tag @samp{Apple-364}, build it, and
install the assembler as @file{usr/bin/as}. See
extensions are generally specific to Mac programming.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{powerpc-*-elf}powerpc-*-elf, powerpc-*-sysv4
PowerPC system in big endian mode, running System V.4.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{powerpc-*-linux-gnu*}powerpc-*-linux-gnu*
You will need
-@uref{ftp://ftp.varesearch.com/pub/support/hjl/binutils,,binutils 2.9.4.0.8}
-or newer for a working GCC@. It is strongly recommended to recompile binutils
-if you initially built it with gcc-2.7.2.x.
+@uref{ftp://ftp.kernel.org/pub/linux/devel/binutils,,binutils 2.13.90.0.10}
+or newer for a working GCC@.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{powerpc-*-netbsd*}powerpc-*-netbsd*
PowerPC system in big endian mode running NetBSD@. To build the
-documentation you will need Texinfo version 4.0 (NetBSD 1.5.1 included
+documentation you will need Texinfo version 4.2 (NetBSD 1.5.1 included
Texinfo version 3.12).
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{powerpc-*-eabiaix}powerpc-*-eabiaix
Embedded PowerPC system in big endian mode with @option{-mcall-aix} selected as
the default.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{powerpc-*-eabisim}powerpc-*-eabisim
Embedded PowerPC system in big endian mode for use in running under the
PSIM simulator.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{powerpc-*-eabi}powerpc-*-eabi
Embedded PowerPC system in big endian mode.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{powerpcle-*-elf}powerpcle-*-elf, powerpcle-*-sysv4
PowerPC system in little endian mode, running System V.4.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{powerpcle-*-eabisim}powerpcle-*-eabisim
Embedded PowerPC system in little endian mode for use in running under
the PSIM simulator.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{powerpcle-*-eabi}powerpcle-*-eabi
Embedded PowerPC system in little endian mode.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{powerpcle-*-winnt}powerpcle-*-winnt, powerpcle-*-pe
PowerPC system in little endian mode running Windows NT@.
@html
-</p>
-<hr>
-@end html
-@heading @anchor{romp-*-aos}romp-*-aos, romp-*-mach
-The only operating systems supported for the IBM RT PC are AOS and
-MACH@. GCC does not support AIX running on the RT@. We recommend you
-compile GCC with an earlier version of itself; if you compile GCC
-with @command{hc}, the Metaware compiler, it will work, but you will get
-mismatches between the stage 2 and stage 3 compilers in various files.
-These errors are minor differences in some floating-point constants and
-can be safely ignored; the stage 3 compiler is correct.
-
-@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{s390-*-linux*}s390-*-linux*
-S/390 system running Linux for S/390@.
+S/390 system running Linux for S/390@.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{s390x-*-linux*}s390x-*-linux*
-zSeries system (64 Bit) running Linux for zSeries@.
+zSeries system (64-bit) running Linux for zSeries@.
@html
-</p>
-<hr>
+<hr />
@end html
@c Please use Solaris 2 to refer to all release of Solaris, starting
@c with 2.0 until 2.6, 7, and 8. Solaris 1 was a marketing name for
The Solaris 2 @command{/bin/sh} will often fail to configure
@file{libstdc++-v3}, @file{boehm-gc} or
@file{libjava}. If you encounter this problem, set @env{CONFIG_SHELL} to
-@command{/bin/ksh} in your environment and run @command{make bootstrap} again.
-Another possibility that sometimes helps is to remove
-@file{*-*-solaris2*/config.cache}.
+@command{/bin/ksh} in your environment before running @command{configure}.
Solaris 2 comes with a number of optional OS packages. Some of these
packages are needed to use GCC fully, namely @code{SUNWarc},
that omitting the type means @code{int}; this assumption worked for C89 but
is wrong for C++, and is now wrong for C99 also.
-@command{g++} accepts such (illegal) constructs with the option
+@command{g++} accepts such (invalid) constructs with the option
@option{-fpermissive}; it
will assume that any missing type is @code{int} (as defined by C89).
108653-22 for Intel) that fix this bug.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{sparc-sun-solaris2*}sparc-sun-solaris2*
+When GCC is configured to use binutils 2.11.2 or later the binaries
+produced are smaller than the ones produced using Sun's native tools;
+this difference is quite significant for binaries containing debugging
+information.
+
Sun @command{as} 4.x is broken in that it cannot cope with long symbol names.
A typical error message might look similar to the following:
-@samp{/usr/ccs/bin/as: "/var/tmp/ccMsw135.s", line 11041:
-error: can't compute value of an expression involving an external symbol.}
+@smallexample
+/usr/ccs/bin/as: "/var/tmp/ccMsw135.s", line 11041: error:
+ can't compute value of an expression involving an external symbol.
+@end smallexample
This is Sun bug 4237974. This is fixed with patch 108908-02 for Solaris
2.6 and has been fixed in later (5.x) versions of the assembler,
starting with Solaris 7.
Starting with Solaris 7, the operating system is capable of executing
-64-bit SPARC V9 binaries. GCC 3.1 and later should properly support
-this. GCC 3.0 lacks the infrastructure necessary to support this
-configuration properly. However, if all you want is code tuned for
-the UltraSPARC CPU, you should try the @option{-mtune=ultrasparc}
-option instead, which should be safe from those bugs and produce code
-that, unlike full 64-bit code, can still run on non-UltraSPARC
+64-bit SPARC V9 binaries. GCC 3.1 and later properly supports
+this; the @option{-m64} option enables 64-bit code generation.
+However, if all you want is code tuned for the UltraSPARC CPU, you
+should try the @option{-mtune=ultrasparc} option instead, which produces
+code that, unlike full 64-bit code, can still run on non-UltraSPARC
machines.
+When configuring on a Solaris 7 or later system that is running a kernel
+that supports only 32-bit binaries, one must configure with
+@option{--disable-multilib}, since we will not be able to build the
+64-bit target libraries.
+
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{sparc-sun-solaris2.7}sparc-sun-solaris2.7
@item
Copy the original, unpatched Solaris 7
@command{/usr/ccs/bin/as} into
-@command{/usr/local/lib/gcc-lib/sparc-sun-solaris2.7/3.0/as},
+@command{/usr/local/lib/gcc-lib/sparc-sun-solaris2.7/3.1/as},
adjusting the latter name to fit your local conventions and software
version numbers.
only a partial fix for bug 4210064, but Sun doesn't know whether the
partial fix is adequate for GCC@. Revision -08 or later should fix
the bug. The current (as of 2001-09-24) revision is -14, and is included in
-the Solaris 7 Recommended Patch Cluster.
+the Solaris 7 Recommended Patch Cluster.
@end itemize
@html
<p>
-<hr>
-@end html
-@heading @anchor{*-*-solaris2.8}*-*-solaris2.8
-
-The Solaris 8 linker fails to link some @samp{libjava} programs if
-previously-installed GCC java libraries already exist in the configured
-prefix. For this reason, @samp{libgcj} is disabled by default on Solaris 8.
-If you use GNU @command{ld}, or if you don't have a previously-installed @samp{libgcj} in
-the same prefix, use @option{--enable-libgcj} to build and install the
-Java libraries.
-
-@html
-<p>
-<hr>
+<hr />
@end html
@heading @anchor{sparc-sun-sunos4*}sparc-sun-sunos4*
@command{make}.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{sparc-unknown-linux-gnulibc1}sparc-unknown-linux-gnulibc1
@html
-</p>
-<hr>
+<hr />
+@end html
+@heading @anchor{sparc-*-linux*}sparc-*-linux*
+
+GCC versions 3.0 and higher require binutils 2.11.2 and glibc 2.2.4
+or newer on this platform. All earlier binutils and glibc
+releases mishandled unaligned relocations on @code{sparc-*-*} targets.
+
+
+@html
+<hr />
@end html
@heading @anchor{sparc64-*-*}sparc64-*-*
invocation with an environment that causes @command{configure} to
recognize (via @samp{uname -a}) the system as @samp{sparc-*-*} instead.
+@html
+<hr />
+@end html
+@heading @anchor{sparcv9-*-solaris2*}sparcv9-*-solaris2*
+
+The following compiler flags must be specified in the configure
+step in order to bootstrap this target with the Sun compiler:
+
+@example
+ % CC="cc -xildoff -xarch=v9" @var{srcdir}/configure [@var{options}] [@var{target}]
+@end example
+
+@option{-xildoff} turns off the incremental linker, and @option{-xarch=v9}
+specifies the v9 architecture to the Sun linker and assembler.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{#*-*-sysv*}*-*-sysv*
On System V release 3, you may get this error message
@file{/usr/ucb} uses libraries which have bugs.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{vax-dec-ultrix}vax-dec-ultrix
Don't try compiling with VAX C (@code{vcc}). It produces incorrect code
in some cases (for example, when @code{alloca} is used).
@html
-</p>
-<hr>
-@end html
-@heading @anchor{we32k-*-*}we32k-*-*
-These computers are also known as the 3b2, 3b5, 3b20 and other similar
-names. (However, the 3b1 is actually a 68000.)
+<hr />
+@end html
+@heading @anchor{*-*-vxworks*}*-*-vxworks*
+Support for VxWorks is in flux. At present GCC supports @emph{only} the
+very recent VxWorks 5.5 (aka Tornado 2.2) release, and only on PowerPC.
+We welcome patches for other architectures supported by VxWorks 5.5.
+Support for VxWorks AE would also be welcome; we believe this is merely
+a matter of writing an appropriate ``configlette'' (see below). We are
+not interested in supporting older, a.out or COFF-based, versions of
+VxWorks in GCC 3.
+
+VxWorks comes with an older version of GCC installed in
+@file{@var{$WIND_BASE}/host}; we recommend you do not overwrite it.
+Choose an installation @var{prefix} entirely outside @var{$WIND_BASE}.
+Before running @command{configure}, create the directories @file{@var{prefix}}
+and @file{@var{prefix}/bin}. Link or copy the appropriate assembler,
+linker, etc. into @file{@var{prefix}/bin}, and set your @var{PATH} to
+include that directory while running both @command{configure} and
+@command{make}.
-Don't use @option{-g} when compiling with the system's compiler. The
-system's linker seems to be unable to handle such a large program with
-debugging information.
+You must give @command{configure} the
+@option{--with-headers=@var{$WIND_BASE}/target/h} switch so that it can
+find the VxWorks system headers. Since VxWorks is a cross compilation
+target only, you must also specify @option{--target=@var{target}}.
+@command{configure} will attempt to create the directory
+@file{@var{prefix}/@var{target}/sys-include} and copy files into it;
+make sure the user running @command{configure} has sufficient privilege
+to do so.
-The system's compiler runs out of capacity when compiling @file{stmt.c}
-in GCC@. You can work around this by building @file{cpp} in GCC
-first, then use that instead of the system's preprocessor with the
-system's C compiler to compile @file{stmt.c}. Here is how:
+GCC's exception handling runtime requires a special ``configlette''
+module, @file{contrib/gthr_supp_vxw_5x.c}. Follow the instructions in
+that file to add the module to your kernel build. (Future versions of
+VxWorks will incorporate this module.)
-@smallexample
-mv /lib/cpp /lib/cpp.att
-cp cpp /lib/cpp.gnu
-echo '/lib/cpp.gnu -traditional $@{1+"$@@"@}' > /lib/cpp
-chmod +x /lib/cpp
-@end smallexample
+@html
+<hr />
+@end html
+@heading @anchor{xtensa-*-elf}xtensa-*-elf
-The system's compiler produces bad code for some of the GCC
-optimization files. So you must build the stage 2 compiler without
-optimization. Then build a stage 3 compiler with optimization.
-That executable should work. Here are the necessary commands:
+This target is intended for embedded Xtensa systems using the
+@samp{newlib} C library. It uses ELF but does not support shared
+objects. Designed-defined instructions specified via the
+Tensilica Instruction Extension (TIE) language are only supported
+through inline assembly.
-@smallexample
-make LANGUAGES=c CC=stage1/xgcc CFLAGS="-Bstage1/ -g"
-make stage2
-make CC=stage2/xgcc CFLAGS="-Bstage2/ -g -O"
-@end smallexample
+The Xtensa configuration information must be specified prior to
+building GCC@. The @file{gcc/config/xtensa/xtensa-config.h} header
+file contains the configuration information. If you created your
+own Xtensa configuration with the Xtensa Processor Generator, the
+downloaded files include a customized copy of this header file,
+which you can use to replace the default header file.
-You may need to raise the ULIMIT setting to build a C++ compiler,
-as the file @file{cc1plus} is larger than one megabyte.
+@html
+<hr />
+@end html
+@heading @anchor{xtensa-*-linux*}xtensa-*-linux*
+
+This target is for Xtensa systems running GNU/Linux. It supports ELF
+shared objects and the GNU C library (glibc). It also generates
+position-independent code (PIC) regardless of whether the
+@option{-fpic} or @option{-fPIC} options are used. In other
+respects, this target is the same as the
+@uref{#xtensa-*-elf,,@samp{xtensa-*-elf}} target.
@html
-</p>
-<hr>
+<hr />
@end html
-@heading @anchor{windows}Microsoft Windows (32 bit)
+@heading @anchor{windows}Microsoft Windows (32-bit)
A port of GCC 2.95.x is included with the
@uref{http://www.cygwin.com/,,Cygwin environment}.
without modification.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{os2}OS/2
ftp://ftp.leo.org/pub/comp/os/os2/leo/devtools/emx+gcc/}.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{older}Older systems
GCC contains support files for many older (1980s and early
1990s) Unix variants. For the most part, support for these systems
has not been deliberately removed, but it has not been maintained for
-several years and may suffer from bitrot. Support from some systems
-has been removed from GCC 3: fx80, ns32-ns-genix, pyramid, tahoe,
-gmicro, spur; most of these targets had not been updated since GCC
-version 1.
+several years and may suffer from bitrot.
-Support for older systems as targets for cross-compilation is less
-problematic than support for them as hosts for GCC; if an enthusiast
-wishes to make such a target work again (including resurrecting any
-of the targets that never worked with GCC 2, starting from the last
-CVS version before they were removed), patches
-@uref{../contribute.html,,following the usual requirements}
-would be likely to be accepted, since they should not affect the
-support for more modern targets.
+Starting with GCC 3.1, each release has a list of ``obsoleted'' systems.
+Support for these systems is still present in that release, but
+@command{configure} will fail unless the @option{--enable-obsolete}
+option is given. Unless a maintainer steps forward, support for these
+systems will be removed from the next release of GCC@.
Support for old systems as hosts for GCC can cause problems if the
workarounds for compiler, library and operating system bugs affect the
cleanliness or maintainability of the rest of GCC@. In some cases, to
bring GCC up on such a system, if still possible with current GCC, may
require first installing an old version of GCC which did work on that
-system, and using it to compile a more recent GCC, to avoid bugs in
-the vendor compiler. Old releases of GCC 1 and GCC 2 are available in
-the @file{old-releases} directory on the
-@uref{../mirrors.html,,GCC mirror sites}. Header bugs may generally
-be avoided using @command{fixincludes}, but bugs or deficiencies in
-libraries and the operating system may still cause problems.
+system, and using it to compile a more recent GCC, to avoid bugs in the
+vendor compiler. Old releases of GCC 1 and GCC 2 are available in the
+@file{old-releases} directory on the @uref{../mirrors.html,,GCC mirror
+sites}. Header bugs may generally be avoided using
+@command{fixincludes}, but bugs or deficiencies in libraries and the
+operating system may still cause problems.
+
+Support for older systems as targets for cross-compilation is less
+problematic than support for them as hosts for GCC; if an enthusiast
+wishes to make such a target work again (including resurrecting any of
+the targets that never worked with GCC 2, starting from the last CVS
+version before they were removed), patches
+@uref{../contribute.html,,following the usual requirements} would be
+likely to be accepted, since they should not affect the support for more
+modern targets.
For some systems, old versions of GNU binutils may also be useful,
and are available from @file{pub/binutils/old-releases} on
current GCC) is to be found in the GCC texinfo manual.
@html
-</p>
-<hr>
+<hr />
@end html
@heading @anchor{elf_targets}all ELF targets (SVR4, Solaris 2, etc.)
@html
-</p>
-<hr>
+<hr />
+<p>
+@end html
+@ifhtml
+@uref{./index.html,,Return to the GCC Installation page}
+@end ifhtml
+@end ifset
+
+@c ***Old documentation******************************************************
+@ifset oldhtml
+@include install-old.texi
+@html
+<hr />
+<p>
+@end html
+@ifhtml
+@uref{./index.html,,Return to the GCC Installation page}
+@end ifhtml
+@end ifset
+
+@c ***GFDL********************************************************************
+@ifset gfdlhtml
+@include fdl.texi
+@html
+<hr />
<p>
@end html
@ifhtml
@c Part 6 The End of the Document
@ifinfo
@comment node-name, next, previous, up
-@node Concept Index, , Specific, Top
+@node Concept Index, , GNU Free Documentation License, Top
@end ifinfo
@ifinfo
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