@settitle Installing GCC: GNU Free Documentation License
@end ifset
-@c Copyright (C) 1988-2017 Free Software Foundation, Inc.
+@c Copyright (C) 1988-2018 Free Software Foundation, Inc.
@c *** Converted to texinfo by Dean Wakerley, dean@wakerley.com
@c IMPORTANT: whenever you modify this file, run `install.texi2html' to
@c Part 2 Summary Description and Copyright
@copying
-Copyright @copyright{} 1988-2017 Free Software Foundation, Inc.
+Copyright @copyright{} 1988-2018 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 1.3 or
systems' @command{tar} programs will also work, only try GNU
@command{tar} if you have problems.
-@item Perl version 5.6.1 (or later)
+@item Perl version between 5.6.1 and 5.6.24
Necessary when targeting Darwin, building @samp{libstdc++},
and not using @option{--disable-symvers}.
Used by various scripts to generate some files included in SVN (mainly
Unicode-related and rarely changing) from source tables.
+Used by @command{automake}.
+
@end table
Several support libraries are necessary to build GCC, some are required,
@item MPFR Library version 2.4.2 (or later)
Necessary to build GCC@. It can be downloaded from
-@uref{http://www.mpfr.org/}. If an MPFR source distribution is found
+@uref{https://www.mpfr.org}. If an MPFR source distribution is found
in a subdirectory of your GCC sources named @file{mpfr}, it will be
built together with GCC. Alternatively, if MPFR is already installed
but it is not in your default library search path, the
@item MPC Library version 0.8.1 (or later)
Necessary to build GCC@. It can be downloaded from
-@uref{http://www.multiprecision.org/}. If an MPC source distribution
+@uref{http://www.multiprecision.org/mpc/}. If an MPC source distribution
is found in a subdirectory of your GCC sources named @file{mpc}, it
will be built together with GCC. Alternatively, if MPC is already
installed but it is not in your default library search path, the
@heading Tools/packages necessary for modifying GCC
@table @asis
-@item autoconf version 2.64
+@item autoconf version 2.69
@itemx GNU m4 version 1.4.6 (or later)
Necessary when modifying @file{configure.ac}, @file{aclocal.m4}, etc.@:
to regenerate @file{configure} and @file{config.in} files.
-@item automake version 1.11.6
+@item automake version 1.15.1
Necessary when modifying a @file{Makefile.am} file to regenerate its
associated @file{Makefile.in}.
as any of their subdirectories.
For directories that use automake, GCC requires the latest release in
-the 1.11 series, which is currently 1.11.6. When regenerating a directory
-to a newer version, please update all the directories using an older 1.11
+the 1.15 series, which is currently 1.15.1. When regenerating a directory
+to a newer version, please update all the directories using an older 1.15
to the latest released version.
@item gettext version 0.14.5 (or later)
will be built. Package names currently recognized in the GCC tree are
@samp{libgcc} (also known as @samp{gcc}), @samp{libstdc++} (not
@samp{libstdc++-v3}), @samp{libffi}, @samp{zlib}, @samp{boehm-gc},
-@samp{ada}, @samp{libada}, @samp{libgo}, and @samp{libobjc}.
+@samp{ada}, @samp{libada}, @samp{libgo}, @samp{libobjc}, and @samp{libphobos}.
Note @samp{libiberty} does not support shared libraries at all.
Use @option{--disable-shared} to build only static libraries. Note that
information should be used instead of whatever format the host normally
uses. Normally GCC uses the same debug format as the host system.
-On MIPS based systems and on Alphas, you must specify whether you want
-GCC to create the normal ECOFF debugging format, or to use BSD-style
-stabs passed through the ECOFF symbol table. The normal ECOFF debug
-format cannot fully handle languages other than C@. BSD stabs format can
-handle other languages, but it only works with the GNU debugger GDB@.
-
-Normally, GCC uses the ECOFF debugging format by default; if you
-prefer BSD stabs, specify @option{--with-stabs} when you configure GCC@.
-
-No matter which default you choose when you configure GCC, the user
-can use the @option{-gcoff} and @option{-gstabs+} options to specify explicitly
-the debug format for a particular compilation.
-
-@option{--with-stabs} is meaningful on the ISC system on the 386, also, if
-@option{--with-gas} is used. It selects use of stabs debugging
-information embedded in COFF output. This kind of debugging information
-supports C++ well; ordinary COFF debugging information does not.
-
-@option{--with-stabs} is also meaningful on 386 systems running SVR4. It
-selects use of stabs debugging information embedded in ELF output. The
-C++ compiler currently (2.6.0) does not support the DWARF debugging
-information normally used on 386 SVR4 platforms; stabs provide a
-workable alternative. This requires gas and gdb, as the normal SVR4
-tools can not generate or interpret stabs.
-
@item --with-tls=@var{dialect}
Specify the default TLS dialect, for systems were there is a choice.
For ARM targets, possible values for @var{dialect} are @code{gnu} or
still be built (see @option{--disable-libvtv} to turn off building libvtv).
@option{--disable-vtable-verify} is the default.
+@item --disable-gcov
+Specify that the run-time library used for coverage analysis
+and associated host tools should not be built.
+
@item --disable-multilib
Specify that multiple target
libraries to support different target variants, calling
@itemx --without-multilib-list
Specify what multilibs to build. @var{list} is a comma separated list of
values, possibly consisting of a single value. Currently only implemented
-for arm*-*-*, sh*-*-* and x86-64-*-linux*. The accepted values and meaning
-for each target is given below.
+for arm*-*-*, riscv*-*-*, sh*-*-* and x86-64-*-linux*. The accepted
+values and meaning for each target is given below.
@table @code
@item arm*-*-*
@code{-mfloat-abi=hard}
@end multitable
+@item riscv*-*-*
+@var{list} is a single ABI name. The target architecture must be either
+@code{rv32gc} or @code{rv64gc}. This will build a single multilib for the
+specified architecture and ABI pair. If @code{--with-multilib-list} is not
+given, then a default set of multilibs is selected based on the value of
+@option{--target}. This is usually a large set of multilibs.
+
@item sh*-*-*
@var{list} is a comma separated list of CPU names. These must be of the
form @code{sh*} or @code{m*} (in which case they match the compiler option
SVR4-based MIPS ABIs and require support from GNU binutils
and the runtime C library.
+@item --with-stack-clash-protection-guard-size=@var{size}
+On certain targets this option sets the default stack clash protection guard
+size as a power of two in bytes. On AArch64 @var{size} is required to be either
+12 (4KB) or 16 (64KB).
+
@item --enable-__cxa_atexit
Define if you want to use __cxa_atexit, rather than atexit, to
register C++ destructors for local statics and global objects.
grep ^language= */config-lang.in
@end smallexample
Currently, you can use any of the following:
-@code{all}, @code{default}, @code{ada}, @code{c}, @code{c++}, @code{fortran},
-@code{go}, @code{jit}, @code{lto}, @code{objc}, @code{obj-c++}.
+@code{all}, @code{default}, @code{ada}, @code{c}, @code{c++}, @code{d},
+@code{fortran}, @code{go}, @code{jit}, @code{lto}, @code{objc}, @code{obj-c++}.
Building the Ada compiler has special requirements, see below.
If you do not pass this flag, or specify the option @code{default}, then the
default languages available in the @file{gcc} sub-tree will be configured.
-Ada, Go, Jit, and Objective-C++ are not default languages. LTO is not a
+Ada, D, Go, Jit, and Objective-C++ are not default languages. LTO is not a
default language, but is built by default because @option{--enable-lto} is
enabled by default. The other languages are default languages. If
@code{all} is specified, then all available languages are built. An
@item --disable-libssp
Specify that the run-time libraries for stack smashing protection
-should not be built.
+should not be built or linked against. On many targets library support
+is provided by the C library instead.
@item --disable-libquadmath
Specify that the GCC quad-precision math library should not be built.
See ``i386 and x86-64 Options'' in the main manual
@end ifhtml
+@item --enable-large-address-aware
+The @option{--enable-large-address-aware} option arranges for MinGW
+executables to be linked using the @option{--large-address-aware}
+option, that enables the use of more than 2GB of memory. If GCC is
+configured with this option, its effects can be reversed by passing the
+@option{-Wl,--disable-large-address-aware} option to the so-configured
+compiler driver.
+
@item --enable-win32-registry
@itemx --enable-win32-registry=@var{key}
@itemx --disable-win32-registry
128-bit @code{long double} when built against GNU C Library 2.4 and later,
64-bit @code{long double} otherwise.
+@item --with-long-double-format=ibm
+@itemx --with-long-double-format=ieee
+Specify whether @code{long double} uses the IBM extended double format
+or the IEEE 128-bit floating point format on PowerPC Linux systems.
+This configuration switch will only work on little endian PowerPC
+Linux systems and on big endian 64-bit systems where the default cpu
+is at least power7 (i.e. @option{--with-cpu=power7},
+@option{--with-cpu=power8}, or @option{--with-cpu=power9} is used).
+
+If you use the @option{--with-long-double-64} configuration option,
+the @option{--with-long-double-format=ibm} and
+@option{--with-long-double-format=ieee} options are ignored.
+
+The default @code{long double} format is to use IBM extended double.
+Until all of the libraries are converted to use IEEE 128-bit floating
+point, it is not recommended to use
+@option{--with-long-double-format=ieee}.
+
+On little endian PowerPC Linux systems, if you explicitly set the
+@code{long double} type, it will build multilibs to allow you to
+select either @code{long double} format, unless you disable multilibs
+with the @code{--disable-multilib} option. At present,
+@code{long double} multilibs are not built on big endian PowerPC Linux
+systems. If you are building multilibs, you will need to configure
+the compiler using the @option{--with-system-zlib} option.
+
+If you do not set the @code{long double} type explicitly, no multilibs
+will be generated.
+
@item --enable-fdpic
On SH Linux systems, generate ELF FDPIC code.
shorthand for
@option{--with-hsa-runtime-lib=@/@var{hsainstalldir}/lib} and
@option{--with-hsa-runtime-include=@/@var{hsainstalldir}/include}.
+
+@item --enable-cet
+@itemx --disable-cet
+Enable building target run-time libraries with control-flow
+instrumentation, see @option{-fcf-protection} option. When
+@code{--enable-cet} is specified target libraries are configured
+to add @option{-fcf-protection} and, if needed, other target
+specific options to a set of building options.
+
+The option is disabled by default. When @code{--enable-cet=auto}
+is used, it is enabled on Linux/x86 if target binutils
+supports @code{Intel CET} instructions and disabled otherwise.
+In this case the target libraries are configured to get additional
+@option{-fcf-protection} option.
@end table
@subheading Cross-Compiler-Specific Options
must be used along with @code{bootstrap-debug-lean} and
@code{bootstrap-debug-lib}.
+@item @samp{bootstrap-cet}
+This option enables Intel CET for host tools during bootstrapping.
+@samp{BUILD_CONFIG=bootstrap-cet} is equivalent to adding
+@option{-fcf-protection} to @samp{BOOT_CFLAGS}. This option
+assumes that the host supports Intel CET (e.g. GNU assembler version
+2.30 or later).
+
@item @samp{bootstrap-time}
Arranges for the run time of each program started by the GCC driver,
built in any stage, to be logged to @file{time.log}, in the top level of
In order to run sets of tests selectively, there are targets
@samp{make check-gcc} and language specific @samp{make check-c},
-@samp{make check-c++}, @samp{make check-fortran},
+@samp{make check-c++}, @samp{make check-d} @samp{make check-fortran},
@samp{make check-ada}, @samp{make check-objc}, @samp{make check-obj-c++},
@samp{make check-lto}
in the @file{gcc} subdirectory of the object directory. You can also
@item
@uref{#alpha-x-x,,alpha*-*-*}
@item
-@uref{#alpha-dec-osf51,,alpha*-dec-osf5.1}
-@item
@uref{#amd64-x-solaris210,,amd64-*-solaris2.10}
@item
@uref{#arm-x-eabi,,arm-*-eabi}
@item
@uref{#mips-x-x,,mips-*-*}
@item
-@uref{#mips-sgi-irix5,,mips-sgi-irix5}
-@item
-@uref{#mips-sgi-irix6,,mips-sgi-irix6}
-@item
@uref{#nds32le-x-elf,,nds32le-*-elf}
@item
@uref{#nds32be-x-elf,,nds32be-*-elf}
@anchor{alpha-x-x}
@heading alpha*-*-*
This section contains general configuration information for all
-alpha-based platforms using ELF (in particular, ignore this section for
-DEC OSF/1, Digital UNIX and Tru64 UNIX)@. In addition to reading this
+Alpha-based platforms using ELF@. In addition to reading this
section, please read all other sections that match your target.
We require binutils 2.11.2 or newer.
debugging information, not the least of which is incorrect linking of
shared libraries.
-@html
-<hr />
-@end html
-@anchor{alpha-dec-osf51}
-@heading alpha*-dec-osf5.1
-Systems using processors that implement the DEC Alpha architecture and
-are running the DEC/Compaq/HP Unix (DEC OSF/1, Digital UNIX, or Compaq/HP
-Tru64 UNIX) operating system, for example the DEC Alpha AXP systems.
-
-Support for Tru64 UNIX V5.1 has been removed in GCC 4.8. As of GCC 4.6,
-support for Tru64 UNIX V4.0 and V5.0 has been removed. 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.)
-
@html
<hr />
@end html
versions included in Solaris 10, from GNU binutils 2.15 (in
@file{/usr/sfw/bin/gas}), and Solaris 11, from GNU binutils 2.19 or
newer (also available as @file{/usr/bin/gas} and
-@file{/usr/gnu/bin/as}), work fine. Please note that the current
-version, from GNU binutils 2.26, only works on Solaris 12 when using the
-Solaris linker. On Solaris 10 and 11, you either have to wait for GNU
-binutils 2.26.1 or newer, or stay with GNU binutils 2.25.1. Recent
-versions of the Solaris assembler in @file{/usr/ccs/bin/as} work almost
-as well, though.
+@file{/usr/gnu/bin/as}), work fine. The current version, from GNU
+binutils 2.29, is known to work, but the version from GNU binutils 2.26
+must be avoided. Recent versions of the Solaris assembler in
+@file{/usr/ccs/bin/as} work almost as well, though.
@c FIXME: as patch requirements?
For linking, the Solaris linker, is preferred. If you want to use the GNU
10, from GNU binutils 2.15 (in @file{/usr/sfw/bin/gld}), cannot be used,
while the version in Solaris 11, from GNU binutils 2.19 or newer (also
in @file{/usr/gnu/bin/ld} and @file{/usr/bin/gld}), works, as does the
-latest version, from GNU binutils 2.26.
+latest version, from GNU binutils 2.29.
To use GNU @command{as}, configure with the options
@option{--with-gnu-as --with-as=@//usr/@/sfw/@/bin/@/gas}. It may be necessary
@command{configure} option when configuring GCC@. The default is to
use traps on systems that support them.
-@html
-<hr />
-@end html
-@anchor{mips-sgi-irix5}
-@heading mips-sgi-irix5
-Support for IRIX 5 has been removed in GCC 4.6.
-
-@html
-<hr />
-@end html
-@anchor{mips-sgi-irix6}
-@heading mips-sgi-irix6
-Support for IRIX 6.5 has been removed in GCC 4.8. Support for IRIX 6
-releases before 6.5 has been removed in GCC 4.6, as well as support for
-the O32 ABI.
-
@html
<hr />
@end html
Tell GCC where to find it:
@option{--with-build-time-tools=[install-nvptx-tools]/nvptx-none/bin}.
-A nvptx port of newlib is available at
-@uref{https://github.com/MentorEmbedded/nvptx-newlib/,,nvptx-newlib}.
-It can be automatically built together with GCC@. For this, add a
-symbolic link to nvptx-newlib's @file{newlib} directory to the
-directory containing the GCC sources.
+You will need newlib 3.0 git revision
+cd31fbb2aea25f94d7ecedc9db16dfc87ab0c316 or later. It can be
+automatically built together with GCC@. For this, add a symbolic link
+to nvptx-newlib's @file{newlib} directory to the directory containing
+the GCC sources.
Use the @option{--disable-sjlj-exceptions} and
@option{--enable-newlib-io-long-long} options when configuring.
@c alone is too unspecific and must be avoided.
@anchor{x-x-solaris2}
@heading *-*-solaris2*
-Support for Solaris 9 has been removed in GCC 5. Support for Solaris
-8 has been removed in GCC 4.8. Support for Solaris 7 has been removed
-in GCC 4.6.
+Support for Solaris 10 has been obsoleted in GCC 9, but can still be
+enabled by configuring with @option{--enable-obsolete}. Support will be
+removed in GCC 10. Support for Solaris 9 has been removed in GCC 5.
+Support for Solaris 8 has been removed in GCC 4.8. Support for Solaris
+7 has been removed in GCC 4.6.
Sun does not ship a C compiler with Solaris 2 before Solaris 10, though
you can download the Sun Studio compilers for free. In Solaris 10 and
@file{/usr/sfw/bin/gas}), and Solaris 11,
from GNU binutils 2.19 or newer (also in @file{/usr/bin/gas} and
@file{/usr/gnu/bin/as}), are known to work.
-Current versions of GNU binutils (2.26)
-are known to work as well, with the caveat mentioned in
-@uref{#ix86-x-solaris210,,i?86-*-solaris2.10} . Note that your mileage may vary
+The current version, from GNU binutils 2.29,
+is known to work as well. Note that your mileage may vary
if you use a combination of the GNU tools and the Solaris tools: while the
combination GNU @command{as} + Sun @command{ld} should reasonably work,
the reverse combination Sun @command{as} + GNU @command{ld} may fail to
@c FIXME: still?
GNU @command{ld} usually works as well, although the version included in
Solaris 10 cannot be used due to several bugs. Again, the current
-version (2.26) is known to work, but generally lacks platform specific
+version (2.29) is known to work, but generally lacks platform specific
features, so better stay with Solaris @command{ld}. To use the LTO linker
plugin (@option{-fuse-linker-plugin}) with GNU @command{ld}, GNU
binutils @emph{must} be configured with @option{--enable-largefile}.
@item MinGW @uref{#x-x-mingw32,,*-*-mingw32}: MinGW is a native GCC port for
the Win32 subsystem that provides a subset of POSIX.
@item MKS i386-pc-mks: NuTCracker from MKS. See
-@uref{http://www.mkssoftware.com/} for more information.
+@uref{https://www.mkssoftware.com} for more information.
@end itemize
@subheading Intel 64-bit versions
projects / thirdparty / gcc.git / blobdiff