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Re: [RFC] New features for multilib control
- From: Eric Gallager <egall at gwmail dot gwu dot edu>
- To: Matthew Fortune <mfortune at gmail dot com>
- Cc: gcc-patches at gcc dot gnu dot org, Palmer Dabbelt <palmer at sifive dot com>
- Date: Wed, 13 Jun 2018 11:26:35 -0400
- Subject: Re: [RFC] New features for multilib control
- References: <08c301d4031e$50758bd0$f160a370$@gmail.com>
On 6/13/18, Matthew Fortune <mfortune@gmail.com> wrote:
> Hi,
>
> This patch was developed as part of preparing ever more complex multilib
> combinations for the MIPS architecture and aims to solve several problems
> in this area. I've attempted to be quite verbose in the description, so
> that I can explain how I am using various terms as pretty much everyone
> has a different understanding (and I don't claim mine to be 'right'
> either).
>
> The changes aim to:
>
> 1) Eliminate the fallback multilib
> The fallback multilib (top level of 'lib') is often annoying because it is
> used for any combination of options that do not match a specific multilib.
> Quite often this default multilib is incompatible with the build options
> that end up linking against it, leading to bizarre link time messages that
> confuse ordinary users.
>
> 2) Move the default multilib to a subfolder
> Having successfully eliminated the fallback multilib it is also true that
> it would eliminate the 'default' multilib as well. I.e. the library used
> when no relevant user options are supplied. Moving this library to a
> subfolder has two benefits. a) it still exists! and b) the location of
> this library becomes invariant irrespective of which options are
> build-time configured as default.
>
> 3) Preserve/use invariant paths for multilib variants
> A simplistic multilib specification leads to a nested set of folders,
> where the top level is the left-most multilib directory and the bottom is
> the right most. Introducing a new axis of multilib configuration changes
> this path structure leading to the different library configurations to
> move around. This is not in itself a problem, as the compiler driver can
> always locate the right path for any given build, but it does cause issues
> when doing configuration management of binary toolchains. When there are
> many different multilibs it is ideal to ship/install only the ones that
> are important and if the paths keep changing over time this process is
> complex and confusing. This issue is effectively solved by the
> MULTI_OSDIRNAMES feature but using it for both sysroot and compiler
> internal libraries is even better.
>
> 4) Support un-released multilib configurations
> This one sounds weird but it is quite valuable. When an architecture has
> 70+ possible multilib variants but only 40 of them are currently known to
> be needed then only build and release 40 variants. However, if it turns
> out that another configuration becomes useful then it is often handy to
> just build the missing configuration and install it into the pre-existing
> release. So, the driver needs to know about all multilibs and their paths
> but the build process should only build a subset.
>
> So, the solution...
>
> Firstly, be verbose about the MULTILIB_OPTIONS needed for a target. Add
> in the default options as well as all the others that may, or could, ever
> be supported by the current compiler features. For MIPS supporting
> MIPS32r1 onwards it looks like this:
>
> MULTILIB_OPTIONS = muclibc
> mips32/mips32r2/mips32r6/mips64/mips64r2/mips64r6
> mips16/mmicromips mabi=32/mabi=n32/mabi=64 EB/EL msoft-float mnan=2008
>
> This does create an enormous matrix of possible configurations so this
> has to be trimmed to the valid set using MULTILIB_REQUIRED. Note that
> the valid set should include any that you may wish to support even if
> you don't want to build/release them. By having the default options in
> then this leads to having two copies of the 'default' multilib; one with
> the options implicitly set and one with them explicitly set.
>
> Second, remove the multilib with the implicit default options. This
> equates to the '.' multilib entry. To do this use MULTILIB_EXCLUSIONS to
> remove the negated form of every MULTILIB_OPTION:
>
> MULTILIB_EXCLUSIONS =
> !muclibc/!mips32/!mips32r2/!mips32r6/!mips64/!mips64r2/!mips64r6/!mips16/!mm
> icromips/!mabi=32/!mabi=n32/!mabi=64/!EB/!EL/!msoft-float/!mnan=2008
>
> Third, set the MULTILIB_OSDIRNAMES to have an entry for every valid
> combination of options and use the '!' modifier. Honestly, I'm not sure
> how/why this works but this leads to both the internal library paths and
> sysroot paths using the OSDIRNAME instead of the nested tree of
> MULTILIB_DIRNAMES. Choose a path for each variant that you will never
> change again; I used an encoded form of the configuration for MIPS:
>
> MULTILIB_OSDIRNAMES =
> mips32r6/mabi.32/EB/mnan.2008=!mips-r6-hard$(is_newlib)/lib
>
> Fourth, deal with the fallout from the config-ml.in logic which handles
> the initial 'configure' of a library differently to all of the multilib
> configurations. The basic idea is that since the default multilib will now
> report that it belongs in a subdirectory then, when configuring the top
> level multilib, query the driver for the folder. Later when iterating
> through the multilib specs skip the one that matches the default
> configuration. Each configuration will be built exactly once and all of
> them will be placed in a subfolder leaving the top level install folder
> bare.
>
> Fifth, restrict the set of multilibs that actually get built for any
> given compiler. This is sort-of a new concept so I added a
> --with-multi-buildlist configure option that points to a file that lists
> all the OSDIRNAME paths that you DO want to build. The config-ml.in file
> queries this list to trim the multilib list. There are existing features
> to trim portions of a multilib list but they are designed to remove a whole
> axis of the configuration and I needed much finer control.
>
> Sixth, update the fixinc logic so that it too will use the multi-buildlist
> restrictions when installing headers.
>
> Finally, add default multi-buildlist files that automatically get chosen
> for certain triples.
>
> I'm aware of a few formatting quirks and other issues in this patch but
> I wanted to share the patch both to get feedback and see if anyone else
> finds it useful to finish it off and help do the required level of testing.
>
> Comments/feedback welcome.
>
> /
> * config-ml.in: Add support for --with-multi-buildlist. Retarget
> the default multilib to a subfolder on install.
> * configure.ac: Add support for --with-multi-buildlist.
> * configure: Regenerate.
>
> gcc/
> * Makefile.in (s-fixinc_list): Add support for
> --with-multi-buildlist.
> * config.gcc: Update mips* multilib configuration.
> * config/mips/ml-img-elf: New file.
> * config/mips/ml-img-linux: Likewise.
> * config/mips/ml-mti-elf: Likewise.
> * config/mips/ml-mti-linux: Likewise.
> * config/mips/mti-elf.h (MULTILIB_DEFAULTS): Undefine.
> * config/mips/mti-linux.h (MULTILIB_DEFAULTS): Undefine.
> * config/mips/t-img-elf: Delete.
> * config/mips/t-img-linux: Delete.
> * config/mips/t-mips-multi: New file.
> * config/mips/t-mti-elf: Delete.
> * config/mips/t-mti-linux: Delete.
> * configure.ac (with_multi_buildlist): New AC_SUBST.
>
> Thanks,
> Matthew
>
> ---
> config-ml.in | 25 ++++-
> configure | 23 +++++
> configure.ac | 23 +++++
> gcc/Makefile.in | 20 ++++
> gcc/config.gcc | 10 +-
> gcc/config/mips/ml-img-elf | 12 +++
> gcc/config/mips/ml-img-linux | 8 ++
> gcc/config/mips/ml-mti-elf | 17 ++++
> gcc/config/mips/ml-mti-linux | 16 ++++
> gcc/config/mips/mti-elf.h | 2 +
> gcc/config/mips/mti-linux.h | 2 +
> gcc/config/mips/t-img-elf | 33 -------
> gcc/config/mips/t-img-linux | 38 --------
> gcc/config/mips/t-mips-multi | 214
> +++++++++++++++++++++++++++++++++++++++++++
> gcc/config/mips/t-mti-elf | 48 ----------
> gcc/config/mips/t-mti-linux | 158 --------------------------------
> gcc/configure | 8 +-
> gcc/configure.ac | 3 +
> 18 files changed, 376 insertions(+), 284 deletions(-)
> create mode 100644 gcc/config/mips/ml-img-elf
> create mode 100644 gcc/config/mips/ml-img-linux
> create mode 100644 gcc/config/mips/ml-mti-elf
> create mode 100644 gcc/config/mips/ml-mti-linux
> delete mode 100644 gcc/config/mips/t-img-elf
> delete mode 100644 gcc/config/mips/t-img-linux
> create mode 100644 gcc/config/mips/t-mips-multi
> delete mode 100644 gcc/config/mips/t-mti-elf
> delete mode 100644 gcc/config/mips/t-mti-linux
>
> diff --git a/config-ml.in b/config-ml.in
> index 47f1533..255dd1f 100644
> --- a/config-ml.in
> +++ b/config-ml.in
> @@ -382,6 +382,23 @@ mips*-*-*)
> esac
> done
> fi
> + if [ x$with_multi_buildlist != x ]
> + then
> + old_multidirs="${multidirs}"
> + if [ ! -f $with_multi_buildlist ]
> + then
> + echo "config-ml.in: Failed to find $with_multi_buildlist"
> + exit 1
> + fi
> + multidirs=""
> + for x in ${old_multidirs}; do
> + found=`grep "^${x}$" $with_multi_buildlist`
> + if [ -n "$found" ]
> + then
> + multidirs="${multidirs} ${x}"
> + fi
> + done
> + fi
> ;;
> powerpc*-*-* | rs6000*-*-*)
> if [ x$enable_aix64 = xno ]
> @@ -582,7 +599,8 @@ else
> fi
>
> if [ -z "${with_multisubdir}" ]; then
> - ml_subdir=
> + ml_top_subdir=`${CC-gcc} --print-multi-directory 2>/dev/null`
> + ml_subdir=/$ml_top_subdir
> ml_builddotdot=
> : # ml_srcdotdot= # already set
> else
> @@ -661,6 +679,11 @@ if [ -n "${multidirs}" ] && [ -z "${ml_norecursion}"
> ];
> then
>
> for ml_dir in ${multidirs}; do
>
> + if [ "${ml_dir}" == "${ml_top_subdir}" ]; then
> + echo "Skipping configure in multilib subdir ${ml_dir}"
> + continue
> + fi
> +
> if [ "${ml_verbose}" = --verbose ]; then
> echo "Running configure in multilib subdir ${ml_dir}"
> echo "pwd: `${PWDCMD-pwd}`"
> diff --git a/configure.ac b/configure.ac
> index 28155a0..ee61f75 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -3053,6 +3053,29 @@ if test x${enable_multilib} = x ; then
> target_configargs="--enable-multilib ${target_configargs}"
> fi
>
> +# Select default multilib build variants
> +if test x${with_multi_buildlist} = x ; then
> + case "$target" in
> + mips*-img-linux*)
> multi_buildlist=${srcdir}/gcc/config/mips/ml-img-linux ;;
> + mips*-mti-linux*)
> multi_buildlist=${srcdir}/gcc/config/mips/ml-mti-linux ;;
> + mips*-img-elf*) multi_buildlist=${srcdir}/gcc/config/mips/ml-img-elf
> ;;
> + mips*-mti-elf*) multi_buildlist=${srcdir}/gcc/config/mips/ml-mti-elf
> ;;
> + esac
> + # Verify the file exists before using it in case the gcc component is
> not
> + # present in the tree.
> + if test -f "${multi_buildlist}" ; then
> + with_multi_buildlist=$multi_buildlist
> + fi
> +fi
> +
> +# Pass through with_multi_buildlist to host and target. 'gcc' needs it
> for
> the
> +# fixed includes which are multilib'd and target libraries need it as they
> use
> +# config-ml.in.
> +if test x${with_multi_buildlist} != x ; then
> + target_configargs="--with-multi-buildlist=${with_multi_buildlist}
> ${target_configargs}"
> + host_configargs="--with-multi-buildlist=${with_multi_buildlist}
> ${host_configargs}"
> +fi
> +
> # Pass --with-newlib if appropriate. Note that target_configdirs has
> # changed from the earlier setting of with_newlib.
> if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep "
> newlib " > /dev/null 2>&1 && test -d ${srcdir}/newlib ; then
> diff --git a/gcc/Makefile.in b/gcc/Makefile.in
> index d8f3e88..8c0aedf 100644
> --- a/gcc/Makefile.in
> +++ b/gcc/Makefile.in
> @@ -587,6 +587,9 @@ else
> endif
> endif
>
> +# Multilib control
> +with_multi_buildlist = @with_multi_buildlist@
> +
> # ------------------------
> # Installation directories
> # ------------------------
> @@ -3022,10 +3025,27 @@ fixinc_list: s-fixinc_list; @true
> s-fixinc_list : $(GCC_PASSES)
> # Build up a list of multilib directories and corresponding sysroot
> # suffixes, in form sysroot;multilib.
> +# Use a filtered multilib list if requested.
> if $(GCC_FOR_TARGET) -print-sysroot-headers-suffix > /dev/null 2>&1;
> then \
> set -e; for ml in `$(GCC_FOR_TARGET) -print-multi-lib`; do \
> multi_dir=`echo $${ml} | sed -e 's/;.*$$//'`; \
> flags=`echo $${ml} | sed -e 's/^[^;]*;//' -e 's/@/ -/g'`; \
> + case "$(target)" in \
> + mips*-*-*) \
> + if [ x$(with_multi_buildlist) != x ]; then \
> + if [ ! -f $(with_multi_buildlist) ]; then \
> + echo "fixinc_list: Failed to find
> $(with_multi_buildlist)"; \
> + exit 1; \
> + fi; \
> + set +e; \
> + found=`grep "^$${multi_dir}$$" $(with_multi_buildlist)`; \
> + set -e; \
> + if [ -z "$$found" ]; then \
> + continue; \
> + fi; \
> + fi; \
> + ;; \
> + esac; \
> sfx=`$(GCC_FOR_TARGET) $${flags} -print-sysroot-headers-suffix`;
> \
> if [ "$${multi_dir}" = "." ]; \
> then multi_dir=""; \
> diff --git a/gcc/config.gcc b/gcc/config.gcc
> index 8b2fd90..41bfd95 100644
> --- a/gcc/config.gcc
> +++ b/gcc/config.gcc
> @@ -2119,7 +2119,7 @@ mips*-*-netbsd*) # NetBSD/mips,
> either endian.
> mips*-img-linux*)
> tm_file="dbxelf.h elfos.h gnu-user.h linux.h linux-android.h
> glibc-stdint.h ${tm_file} mips/gnu-user.h mips/linux.h mips/linux-common.h
> mips/mti-linux.h"
> extra_options="${extra_options} linux-android.opt"
> - tmake_file="${tmake_file} mips/t-img-linux"
> + tmake_file="${tmake_file} mips/t-mips-multi"
> tm_defines="${tm_defines} MIPS_ISA_DEFAULT=37
> MIPS_ABI_DEFAULT=ABI_32"
> with_arch_32="mips32r6"
> with_arch_64="mips64r6"
> @@ -2129,7 +2129,7 @@ mips*-img-linux*)
> mips*-mti-linux*)
> tm_file="dbxelf.h elfos.h gnu-user.h linux.h linux-android.h
> glibc-stdint.h ${tm_file} mips/gnu-user.h mips/linux.h mips/linux-common.h
> mips/mti-linux.h"
> extra_options="${extra_options} linux-android.opt"
> - tmake_file="${tmake_file} mips/t-mti-linux"
> + tmake_file="${tmake_file} mips/t-mips-multi"
> tm_defines="${tm_defines} MIPS_ISA_DEFAULT=33
> MIPS_ABI_DEFAULT=ABI_32"
> with_arch_32="mips32r2"
> with_arch_64="mips64r2"
> @@ -2185,17 +2185,19 @@ mips*-*-linux*) # Linux
> MIPS, either endian.
> ;;
> mips*-mti-elf*)
> tm_file="elfos.h newlib-stdint.h ${tm_file} mips/elf.h
> mips/n32-elf.h mips/sde.h mips/mti-elf.h"
> - tmake_file="mips/t-mti-elf"
> + tmake_file="mips/t-mips-multi"
> tm_defines="${tm_defines} MIPS_ISA_DEFAULT=33
> MIPS_ABI_DEFAULT=ABI_32"
> with_arch_32="mips32r2"
> with_arch_64="mips64r2"
> + TM_MULTILIB_EXCEPTIONS_CONFIG="*muclibc*"
> ;;
> mips*-img-elf*)
> tm_file="elfos.h newlib-stdint.h ${tm_file} mips/elf.h
> mips/n32-elf.h mips/sde.h mips/mti-elf.h"
> - tmake_file="mips/t-img-elf"
> + tmake_file="mips/t-mips-multi"
> tm_defines="${tm_defines} MIPS_ISA_DEFAULT=37
> MIPS_ABI_DEFAULT=ABI_32"
> with_arch_32="mips32r6"
> with_arch_64="mips64r6"
> + TM_MULTILIB_EXCEPTIONS_CONFIG="*muclibc*"
> ;;
> mips*-sde-elf*)
> tm_file="elfos.h newlib-stdint.h ${tm_file} mips/elf.h
> mips/n32-elf.h mips/sde.h"
> diff --git a/gcc/config/mips/ml-img-elf b/gcc/config/mips/ml-img-elf
> new file mode 100644
> index 0000000..91204f82
> --- /dev/null
> +++ b/gcc/config/mips/ml-img-elf
> @@ -0,0 +1,12 @@
> +mips-r6-hard-newlib/lib
> +mips-r6-hard-newlib/lib32
> +mips-r6-hard-newlib/lib64
> +mips-r6-soft-newlib/lib
> +mips-r6-soft-newlib/lib32
> +mips-r6-soft-newlib/lib64
> +mipsel-r6-hard-newlib/lib
> +mipsel-r6-hard-newlib/lib32
> +mipsel-r6-hard-newlib/lib64
> +mipsel-r6-soft-newlib/lib
> +mipsel-r6-soft-newlib/lib32
> +mipsel-r6-soft-newlib/lib64
> diff --git a/gcc/config/mips/ml-img-linux b/gcc/config/mips/ml-img-linux
> new file mode 100644
> index 0000000..fa55ded
> --- /dev/null
> +++ b/gcc/config/mips/ml-img-linux
> @@ -0,0 +1,8 @@
> +mips-r6-hard/lib
> +mips-r6-soft/lib
> +mips-r6-hard/lib32
> +mips-r6-hard/lib64
> +mipsel-r6-hard/lib
> +mipsel-r6-soft/lib
> +mipsel-r6-hard/lib32
> +mipsel-r6-hard/lib64
> diff --git a/gcc/config/mips/ml-mti-elf b/gcc/config/mips/ml-mti-elf
> new file mode 100644
> index 0000000..7ac2deb
> --- /dev/null
> +++ b/gcc/config/mips/ml-mti-elf
> @@ -0,0 +1,17 @@
> +mips-r2-hard-newlib/lib
> +mips-r2-hard-newlib/lib32
> +mips-r2-hard-newlib/lib64
> +mips-r2-hard-nan2008-newlib/lib
> +mips-r2-soft-newlib/lib
> +mips-r2-soft-newlib/lib32
> +mips-r2-soft-newlib/lib64
> +mipsel-r2-hard-newlib/lib
> +mipsel-r2-hard-newlib/lib32
> +mipsel-r2-hard-newlib/lib64
> +mipsel-r2-soft-newlib/lib
> +mipsel-r2-soft-newlib/lib32
> +mipsel-r2-soft-newlib/lib64
> +mipsel-r2-mips16-soft-newlib/lib
> +mipsel-r2-hard-nan2008-newlib/lib
> +micromipsel-r2-hard-nan2008-newlib/lib
> +micromipsel-r2-soft-newlib/lib
> diff --git a/gcc/config/mips/ml-mti-linux b/gcc/config/mips/ml-mti-linux
> new file mode 100644
> index 0000000..1056700
> --- /dev/null
> +++ b/gcc/config/mips/ml-mti-linux
> @@ -0,0 +1,16 @@
> +mips-r2-hard/lib
> +mips-r2-soft/lib
> +mips-r2-hard/lib32
> +mips-r2-hard/lib64
> +mips-r2-hard-nan2008/lib
> +mipsel-r2-hard/lib
> +mipsel-r2-soft/lib
> +mipsel-r2-hard/lib32
> +mipsel-r2-hard/lib64
> +mipsel-r2-hard-nan2008/lib
> +micromipsel-r2-hard-nan2008/lib
> +micromipsel-r2-soft/lib
> +mips-r2-hard-uclibc/lib
> +mips-r2-hard-nan2008-uclibc/lib
> +mipsel-r2-hard-uclibc/lib
> +mipsel-r2-hard-nan2008-uclibc/lib
> diff --git a/gcc/config/mips/mti-elf.h b/gcc/config/mips/mti-elf.h
> index d4a11b1..206efdc 100644
> --- a/gcc/config/mips/mti-elf.h
> +++ b/gcc/config/mips/mti-elf.h
> @@ -17,6 +17,8 @@ You should have received a copy of the GNU General Public
> License
> along with GCC; see the file COPYING3. If not see
> <http://www.gnu.org/licenses/>. */
>
> +#undef MULTILIB_DEFAULTS
> +
> #undef DRIVER_SELF_SPECS
> #define DRIVER_SELF_SPECS \
> /* Set the ISA for the default multilib. */ \
> diff --git a/gcc/config/mips/mti-linux.h b/gcc/config/mips/mti-linux.h
> index 9792972..4fcd0c9 100644
> --- a/gcc/config/mips/mti-linux.h
> +++ b/gcc/config/mips/mti-linux.h
> @@ -23,6 +23,8 @@ along with GCC; see the file COPYING3. If not see
> mips64r3, and mips64r5 will all default to 'r2'. See MULTILIB_MATCHES
> definition in t-mti-linux. */
>
> +#undef MULTILIB_DEFAULTS
> +
> #define MIPS_SYSVERSION_SPEC \
> "%{mips32|mips64:r1;mips32r6|mips64r6:r6;:r2}%{mips16:-mips16}"
>
> diff --git a/gcc/config/mips/t-img-elf b/gcc/config/mips/t-img-elf
> deleted file mode 100644
> index 09159cd..0000000
> --- a/gcc/config/mips/t-img-elf
> +++ /dev/null
> @@ -1,33 +0,0 @@
> -# Copyright (C) 2014-2018 Free Software Foundation, Inc.
> -#
> -# This file is part of GCC.
> -#
> -# GCC is free software; you can redistribute it and/or modify
> -# it under the terms of the GNU General Public License as published by
> -# the Free Software Foundation; either version 3, or (at your option)
> -# any later version.
> -#
> -# GCC is distributed in the hope that it will be useful,
> -# but WITHOUT ANY WARRANTY; without even the implied warranty of
> -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> -# GNU General Public License for more details.
> -#
> -# You should have received a copy of the GNU General Public License
> -# along with GCC; see the file COPYING3. If not see
> -# <http://www.gnu.org/licenses/>.
> -
> -# The default build is mips32r6, hard-float big-endian.
> -# A multilib for mips32r6+LE
> -# A multilib for mips64r6
> -# A multilib for mips64r6+LE
> -
> -MULTILIB_OPTIONS = mips64r6 mabi=64 EL msoft-float/msingle-float
> -MULTILIB_DIRNAMES = mips64r6 64 el sof sgl
> -MULTILIB_MATCHES = EL=mel EB=meb
> -
> -# Don't build 64r6 with single-float
> -MULTILIB_EXCEPTIONS += mips64r6/*msingle-float*
> -
> -MULTILIB_EXCEPTIONS += mabi=64*
> -MULTILIB_EXCEPTIONS += msingle-float*
> -MULTILIB_EXCEPTIONS += *msingle-float
> diff --git a/gcc/config/mips/t-img-linux b/gcc/config/mips/t-img-linux
> deleted file mode 100644
> index ba2b2b8..0000000
> --- a/gcc/config/mips/t-img-linux
> +++ /dev/null
> @@ -1,38 +0,0 @@
> -# Copyright (C) 2014-2018 Free Software Foundation, Inc.
> -#
> -# This file is part of GCC.
> -#
> -# GCC is free software; you can redistribute it and/or modify
> -# it under the terms of the GNU General Public License as published by
> -# the Free Software Foundation; either version 3, or (at your option)
> -# any later version.
> -#
> -# GCC is distributed in the hope that it will be useful,
> -# but WITHOUT ANY WARRANTY; without even the implied warranty of
> -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> -# GNU General Public License for more details.
> -#
> -# You should have received a copy of the GNU General Public License
> -# along with GCC; see the file COPYING3. If not see
> -# <http://www.gnu.org/licenses/>.
> -
> -# The default build is mips32r6, hard-float big-endian. Add mips64r6,
> -# 64-bit ABI and little-endian variations.
> -
> -MULTILIB_OPTIONS = mips64r6 mabi=64 EL
> -MULTILIB_DIRNAMES = mips64r6 64 el
> -MULTILIB_MATCHES = EL=mel EB=meb
> -
> -MULTILIB_REQUIRED =
> -MULTILIB_OSDIRNAMES = .=mips-r6-hard/lib
> -MULTILIB_REQUIRED += mips64r6
> -MULTILIB_OSDIRNAMES += mips64r6=!mips-r6-hard/lib32
> -MULTILIB_REQUIRED += mips64r6/mabi=64
> -MULTILIB_OSDIRNAMES += mips64r6/mabi.64=!mips-r6-hard/lib64
> -
> -MULTILIB_REQUIRED += EL
> -MULTILIB_OSDIRNAMES += EL=!mipsel-r6-hard/lib
> -MULTILIB_REQUIRED += mips64r6/EL
> -MULTILIB_OSDIRNAMES += mips64r6/EL=!mipsel-r6-hard/lib32
> -MULTILIB_REQUIRED += mips64r6/mabi=64/EL
> -MULTILIB_OSDIRNAMES += mips64r6/mabi.64/EL=!mipsel-r6-hard/lib64
> diff --git a/gcc/config/mips/t-mips-multi b/gcc/config/mips/t-mips-multi
> new file mode 100644
> index 0000000..d1f834d
> --- /dev/null
> +++ b/gcc/config/mips/t-mips-multi
> @@ -0,0 +1,214 @@
> +# Copyright (C) 2015 Free Software Foundation, Inc.
> +#
> +# This file is part of GCC.
> +#
> +# GCC is free software; you can redistribute it and/or modify
> +# it under the terms of the GNU General Public License as published by
> +# the Free Software Foundation; either version 3, or (at your option)
> +# any later version.
> +#
> +# GCC is distributed in the hope that it will be useful,
> +# but WITHOUT ANY WARRANTY; without even the implied warranty of
> +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> +# GNU General Public License for more details.
> +#
> +# You should have received a copy of the GNU General Public License
> +# along with GCC; see the file COPYING3. If not see
> +# <http://www.gnu.org/licenses/>.
> +
> +# There is no default build in this multilib setup. This unfortunately
> +# does not prevent config-ml.in from building a default but this can
> +# be removed via post install scripts.
> +#
> +# All possible MIPS multilibs are shown in this file. They are limited
> +# via a file that lists required multilibs for each vendor/OS
> +# combination which can be overridden at build time as well.
> +#
> +# The benefit to describing all multilibs is that the compiler driver
> +# can use any multilib if it is present and therefore additional
> +# library variants can be added to an installation after initial
> +# build. This could be achieved by building all libraries and removing
> +# the ones we don't want to ship but this would massively increase
> +# build times in situations where only a few are required immediately.
> +
> +MULTILIB_OPTIONS = muclibc
> mips32/mips32r2/mips32r6/mips64/mips64r2/mips64r6 mips16/mmicromips
> mabi=32/mabi=n32/mabi=64 EB/EL msoft-float mnan=2008
> +MULTILIB_DIRNAMES = uclibc mips32 mips32r2 mips32r6 mips64 mips64r2
> mips64r6 mips16 micromips 32 n32 64 eb el sof nan2008
> +MULTILIB_MATCHES = EL=mel EB=meb mips32r2=mips32r3 mips32r2=mips32r5
> mips64r2=mips64r3 mips64r2=mips64r5
> +
> +# Allow the exceptions list to be controlled by configure time options
> +MULTILIB_EXCEPTIONS = $(TM_MULTILIB_EXCEPTIONS_CONFIG)
> +
> +# Determine if this is a bare metal target with a newlib default library
> +is_newlib = $(if $(filter elf, $(lastword $(subst -,
> ,$(target)))),-newlib)
> +
> +MULTILIB_EXCLUSIONS =
> !muclibc/!mips32/!mips32r2/!mips32r6/!mips64/!mips64r2/!mips64r6/!mips16/!mm
> icromips/!mabi=32/!mabi=n32/!mabi=64/!EB/!EL/!msoft-float/!mnan=2008
> +
> +# MIPS32R6/MIPS64R6
> +MULTILIB_REQUIRED = mips32r6/mabi=32/EB/mnan=2008
> +MULTILIB_OSDIRNAMES =
> mips32r6/mabi.32/EB/mnan.2008=!mips-r6-hard$(is_newlib)/lib
> +MULTILIB_REUSE =
> mips32r6/mabi.32/EB/mnan.2008=mips64r6/mabi.32/EB/mnan.2008
> +MULTILIB_REQUIRED += mips64r6/mabi=n32/EB/mnan=2008
> +MULTILIB_OSDIRNAMES +=
> mips64r6/mabi.n32/EB/mnan.2008=!mips-r6-hard$(is_newlib)/lib32
> +MULTILIB_REQUIRED += mips64r6/mabi=64/EB/mnan=2008
> +MULTILIB_OSDIRNAMES +=
> mips64r6/mabi.64/EB/mnan.2008=!mips-r6-hard$(is_newlib)/lib64
> +
> +MULTILIB_REQUIRED += mips32r6/mabi=32/EB/msoft-float/mnan=2008
> +MULTILIB_OSDIRNAMES +=
> mips32r6/mabi.32/EB/msoft-float/mnan.2008=!mips-r6-soft$(is_newlib)/lib
> +MULTILIB_REUSE +=
> mips32r6/mabi.32/EB/msoft-float/mnan.2008=mips64r6/mabi.32/EB/msoft-float/mn
> an.2008
> +MULTILIB_REQUIRED += mips64r6/mabi=n32/EB/msoft-float/mnan=2008
> +MULTILIB_OSDIRNAMES +=
> mips64r6/mabi.n32/EB/msoft-float/mnan.2008=!mips-r6-soft$(is_newlib)/lib32
> +MULTILIB_REQUIRED += mips64r6/mabi=64/EB/msoft-float/mnan=2008
> +MULTILIB_OSDIRNAMES +=
> mips64r6/mabi.64/EB/msoft-float/mnan.2008=!mips-r6-soft$(is_newlib)/lib64
> +
> +MULTILIB_REQUIRED += mips32r6/mabi=32/EL/mnan=2008
> +MULTILIB_OSDIRNAMES +=
> mips32r6/mabi.32/EL/mnan.2008=!mipsel-r6-hard$(is_newlib)/lib
> +MULTILIB_REUSE +=
> mips32r6/mabi.32/EL/mnan.2008=mips64r6/mabi.32/EL/mnan.2008
> +MULTILIB_REQUIRED += mips64r6/mabi=n32/EL/mnan=2008
> +MULTILIB_OSDIRNAMES +=
> mips64r6/mabi.n32/EL/mnan.2008=!mipsel-r6-hard$(is_newlib)/lib32
> +MULTILIB_REQUIRED += mips64r6/mabi=64/EL/mnan=2008
> +MULTILIB_OSDIRNAMES +=
> mips64r6/mabi.64/EL/mnan.2008=!mipsel-r6-hard$(is_newlib)/lib64
> +
> +MULTILIB_REQUIRED += mips32r6/mabi=32/EL/msoft-float/mnan=2008
> +MULTILIB_OSDIRNAMES +=
> mips32r6/mabi.32/EL/msoft-float/mnan.2008=!mipsel-r6-soft$(is_newlib)/lib
> +MULTILIB_REUSE +=
> mips32r6/mabi.32/EL/msoft-float/mnan.2008=mips64r6/mabi.32/EL/msoft-float/mn
> an.2008
> +MULTILIB_REQUIRED += mips64r6/mabi=n32/EL/msoft-float/mnan=2008
> +MULTILIB_OSDIRNAMES +=
> mips64r6/mabi.n32/EL/msoft-float/mnan.2008=!mipsel-r6-soft$(is_newlib)/lib32
> +MULTILIB_REQUIRED += mips64r6/mabi=64/EL/msoft-float/mnan=2008
> +MULTILIB_OSDIRNAMES +=
> mips64r6/mabi.64/EL/msoft-float/mnan.2008=!mipsel-r6-soft$(is_newlib)/lib64
> +
> +# MIPS32R2/MIPS64R2
> +MULTILIB_REQUIRED += mips32r2/mabi=32/EB
> +MULTILIB_OSDIRNAMES += mips32r2/mabi.32/EB=!mips-r2-hard$(is_newlib)/lib
> +MULTILIB_REUSE += mips32r2/mabi.32/EB=mips64r2/mabi.32/EB
> +MULTILIB_REQUIRED += mips64r2/mabi=n32/EB
> +MULTILIB_OSDIRNAMES +=
> mips64r2/mabi.n32/EB=!mips-r2-hard$(is_newlib)/lib32
> +MULTILIB_REQUIRED += mips64r2/mabi=64/EB
> +MULTILIB_OSDIRNAMES += mips64r2/mabi.64/EB=!mips-r2-hard$(is_newlib)/lib64
> +
> +MULTILIB_REQUIRED += mips32r2/mabi=32/EB/mnan=2008
> +MULTILIB_OSDIRNAMES +=
> mips32r2/mabi.32/EB/mnan.2008=!mips-r2-hard-nan2008$(is_newlib)/lib
> +MULTILIB_REUSE +=
> mips32r2/mabi.32/EB/mnan.2008=mips64r2/mabi.32/EB/mnan.2008
> +MULTILIB_REQUIRED += mips64r2/mabi=n32/EB/mnan=2008
> +MULTILIB_OSDIRNAMES +=
> mips64r2/mabi.n32/EB/mnan.2008=!mips-r2-hard-nan2008$(is_newlib)/lib32
> +MULTILIB_REQUIRED += mips64r2/mabi=64/EB/mnan=2008
> +MULTILIB_OSDIRNAMES +=
> mips64r2/mabi.64/EB/mnan.2008=!mips-r2-hard-nan2008$(is_newlib)/lib64
> +
> +MULTILIB_REQUIRED += mips32r2/mabi=32/EB/msoft-float
> +MULTILIB_OSDIRNAMES +=
> mips32r2/mabi.32/EB/msoft-float=!mips-r2-soft$(is_newlib)/lib
> +MULTILIB_REUSE +=
> mips32r2/mabi.32/EB/msoft-float=mips64r2/mabi.32/EB/msoft-float
> +MULTILIB_REQUIRED += mips64r2/mabi=n32/EB/msoft-float
> +MULTILIB_OSDIRNAMES +=
> mips64r2/mabi.n32/EB/msoft-float=!mips-r2-soft$(is_newlib)/lib32
> +MULTILIB_REQUIRED += mips64r2/mabi=64/EB/msoft-float
> +MULTILIB_OSDIRNAMES +=
> mips64r2/mabi.64/EB/msoft-float=!mips-r2-soft$(is_newlib)/lib64
> +
> +MULTILIB_REQUIRED += mips32r2/mabi=32/EL
> +MULTILIB_OSDIRNAMES += mips32r2/mabi.32/EL=!mipsel-r2-hard$(is_newlib)/lib
> +MULTILIB_REUSE += mips32r2/mabi.32/EL=mips64r2/mabi.32/EL
> +MULTILIB_REQUIRED += mips64r2/mabi=n32/EL
> +MULTILIB_OSDIRNAMES +=
> mips64r2/mabi.n32/EL=!mipsel-r2-hard$(is_newlib)/lib32
> +MULTILIB_REQUIRED += mips64r2/mabi=64/EL
> +MULTILIB_OSDIRNAMES +=
> mips64r2/mabi.64/EL=!mipsel-r2-hard$(is_newlib)/lib64
> +
> +MULTILIB_REQUIRED += mips32r2/mabi=32/EL/mnan=2008
> +MULTILIB_OSDIRNAMES +=
> mips32r2/mabi.32/EL/mnan.2008=!mipsel-r2-hard-nan2008$(is_newlib)/lib
> +MULTILIB_REUSE +=
> mips32r2/mabi.32/EL/mnan.2008=mips64r2/mabi.32/EL/mnan.2008
> +MULTILIB_REQUIRED += mips64r2/mabi=n32/EL/mnan=2008
> +MULTILIB_OSDIRNAMES +=
> mips64r2/mabi.n32/EL/mnan.2008=!mipsel-r2-hard-nan2008$(is_newlib)/lib32
> +MULTILIB_REQUIRED += mips64r2/mabi=64/EL/mnan=2008
> +MULTILIB_OSDIRNAMES +=
> mips64r2/mabi.64/EL/mnan.2008=!mipsel-r2-hard-nan2008$(is_newlib)/lib64
> +
> +MULTILIB_REQUIRED += mips32r2/mabi=32/EL/msoft-float
> +MULTILIB_OSDIRNAMES +=
> mips32r2/mabi.32/EL/msoft-float=!mipsel-r2-soft$(is_newlib)/lib
> +MULTILIB_REUSE +=
> mips32r2/mabi.32/EL/msoft-float=mips64r2/mabi.32/EL/msoft-float
> +MULTILIB_REQUIRED += mips64r2/mabi=n32/EL/msoft-float
> +MULTILIB_OSDIRNAMES +=
> mips64r2/mabi.n32/EL/msoft-float=!mipsel-r2-soft$(is_newlib)/lib32
> +MULTILIB_REQUIRED += mips64r2/mabi=64/EL/msoft-float
> +MULTILIB_OSDIRNAMES +=
> mips64r2/mabi.64/EL/msoft-float=!mipsel-r2-soft$(is_newlib)/lib64
> +
> +# MIPS16 - We will not include any 64 bit mips16 combinations.
> +MULTILIB_REQUIRED += mips32r2/mips16/mabi=32/EB
> +MULTILIB_OSDIRNAMES +=
> mips32r2/mips16/mabi.32/EB=!mips-r2-mips16-hard$(is_newlib)/lib
> +MULTILIB_REQUIRED += mips32r2/mips16/mabi=32/EB/mnan=2008
> +MULTILIB_OSDIRNAMES +=
> mips32r2/mips16/mabi.32/EB/mnan.2008=!mips-r2-mips16-hard-nan2008$(is_newlib
> )/lib
> +MULTILIB_REQUIRED += mips32r2/mips16/mabi=32/EB/msoft-float
> +MULTILIB_OSDIRNAMES +=
> mips32r2/mips16/mabi.32/EB/msoft-float=!mips-r2-mips16-soft$(is_newlib)/lib
> +
> +MULTILIB_REQUIRED += mips32r2/mips16/mabi=32/EL
> +MULTILIB_OSDIRNAMES +=
> mips32r2/mips16/mabi.32/EL=!mipsel-r2-mips16-hard$(is_newlib)/lib
> +MULTILIB_REQUIRED += mips32r2/mips16/mabi=32/EL/mnan=2008
> +MULTILIB_OSDIRNAMES +=
> mips32r2/mips16/mabi.32/EL/mnan.2008=!mipsel-r2-mips16-hard-nan2008$(is_newl
> ib)/lib
> +MULTILIB_REQUIRED += mips32r2/mips16/mabi=32/EL/msoft-float
> +MULTILIB_OSDIRNAMES +=
> mips32r2/mips16/mabi.32/EL/msoft-float=!mipsel-r2-mips16-soft$(is_newlib)/li
> b
> +
> +# microMIPS32R3 - We will not include any 64 bit microMIPS combinations
> +MULTILIB_REQUIRED += mips32r2/mmicromips/mabi=32/EB/mnan=2008
> +MULTILIB_OSDIRNAMES +=
> mips32r2/mmicromips/mabi.32/EB/mnan.2008=!micromips-r2-hard-nan2008$(is_newl
> ib)/lib
> +MULTILIB_REQUIRED += mips32r2/mmicromips/mabi=32/EB/msoft-float
> +MULTILIB_OSDIRNAMES +=
> mips32r2/mmicromips/mabi.32/EB/msoft-float=!micromips-r2-soft$(is_newlib)/li
> b
> +
> +MULTILIB_REQUIRED += mips32r2/mmicromips/mabi=32/EL/mnan=2008
> +MULTILIB_OSDIRNAMES +=
> mips32r2/mmicromips/mabi.32/EL/mnan.2008=!micromipsel-r2-hard-nan2008$(is_ne
> wlib)/lib
> +MULTILIB_REQUIRED += mips32r2/mmicromips/mabi=32/EL/msoft-float
> +MULTILIB_OSDIRNAMES +=
> mips32r2/mmicromips/mabi.32/EL/msoft-float=!micromipsel-r2-soft$(is_newlib)/
> lib
> +
> +# Version 1 multilibs
> +
> +MULTILIB_REQUIRED += mips32/mabi=32/EB
> +MULTILIB_OSDIRNAMES += mips32/mabi.32/EB=!mips-r1-hard$(is_newlib)/lib
> +MULTILIB_REUSE += mips32/mabi.32/EB=mips64/mabi.32/EB
> +MULTILIB_REQUIRED += mips64/mabi=n32/EB
> +MULTILIB_OSDIRNAMES += mips64/mabi.n32/EB=!mips-r1-hard$(is_newlib)/lib32
> +MULTILIB_REQUIRED += mips64/mabi=64/EB
> +MULTILIB_OSDIRNAMES += mips64/mabi.64/EB=!mips-r1-hard$(is_newlib)/lib64
> +
> +MULTILIB_REQUIRED += mips32/mabi=32/EB/msoft-float
> +MULTILIB_OSDIRNAMES +=
> mips32/mabi.32/EB/msoft-float=!mips-r1-soft$(is_newlib)/lib
> +MULTILIB_REUSE +=
> mips32/mabi.32/EB/msoft-float=mips64/mabi.32/EB/msoft-float
> +MULTILIB_REQUIRED += mips64/mabi=n32/EB/msoft-float
> +MULTILIB_OSDIRNAMES +=
> mips64/mabi.n32/EB/msoft-float=!mips-r1-soft$(is_newlib)/lib32
> +MULTILIB_REQUIRED += mips64/mabi=64/EB/msoft-float
> +MULTILIB_OSDIRNAMES +=
> mips64/mabi.64/EB/msoft-float=!mips-r1-soft$(is_newlib)/lib64
> +
> +MULTILIB_REQUIRED += mips32/mabi=32/EL
> +MULTILIB_OSDIRNAMES += mips32/mabi.32/EL=!mipsel-r1-hard$(is_newlib)/lib
> +MULTILIB_REUSE += mips32/mabi.32/EL=mips64/mabi.32/EL
> +MULTILIB_REQUIRED += mips64/mabi=n32/EL
> +MULTILIB_OSDIRNAMES +=
> mips64/mabi.n32/EL=!mipsel-r1-hard$(is_newlib)/lib32
> +MULTILIB_REQUIRED += mips64/mabi=64/EL
> +MULTILIB_OSDIRNAMES += mips64/mabi.64/EL=!mipsel-r1-hard$(is_newlib)/lib64
> +
> +MULTILIB_REQUIRED += mips32/mabi=32/EL/msoft-float
> +MULTILIB_OSDIRNAMES +=
> mips32/mabi.32/EL/msoft-float=!mipsel-r1-soft$(is_newlib)/lib
> +MULTILIB_REUSE +=
> mips32/mabi.32/EL/msoft-float=mips64/mabi.32/EL/msoft-float
> +MULTILIB_REQUIRED += mips64/mabi=n32/EL/msoft-float
> +MULTILIB_OSDIRNAMES +=
> mips64/mabi.n32/EL/msoft-float=!mipsel-r1-soft$(is_newlib)/lib32
> +MULTILIB_REQUIRED += mips64/mabi=64/EL/msoft-float
> +MULTILIB_OSDIRNAMES +=
> mips64/mabi.64/EL/msoft-float=!mipsel-r1-soft$(is_newlib)/lib64
> +
> +# We will not include any 64 bit mips16 combinations.
> +MULTILIB_REQUIRED += mips32/mips16/mabi=32/EB
> +MULTILIB_OSDIRNAMES +=
> mips32/mips16/mabi.32/EB=!mips-r1-mips16-hard$(is_newlib)/lib
> +MULTILIB_REQUIRED += mips32/mips16/mabi=32/EB/msoft-float
> +MULTILIB_OSDIRNAMES +=
> mips32/mips16/mabi.32/EB/msoft-float=!mips-r1-mips16-soft$(is_newlib)/lib
> +
> +MULTILIB_REQUIRED += mips32/mips16/mabi=32/EL
> +MULTILIB_OSDIRNAMES +=
> mips32/mips16/mabi.32/EL=!mipsel-r1-mips16-hard$(is_newlib)/lib
> +MULTILIB_REQUIRED += mips32/mips16/mabi=32/EL/msoft-float
> +MULTILIB_OSDIRNAMES +=
> mips32/mips16/mabi.32/EL/msoft-float=!mipsel-r1-mips16-soft$(is_newlib)/lib
> +
> +# Uclibc variants
> +ifeq ($(filter *muclibc*,$(MULTILIB_EXCEPTIONS)),)
> +MULTILIB_REQUIRED += muclibc/mips32r2/mabi=32/EB
> +MULTILIB_OSDIRNAMES +=
> muclibc/mips32r2/mabi.32/EB=!mips-r2-hard-uclibc/lib
> +MULTILIB_REUSE +=
> muclibc/mips32r2/mabi.32/EB=muclibc/mips64r2/mabi.32/EB
> +MULTILIB_REQUIRED += muclibc/mips32r2/mabi=32/EB/mnan=2008
> +MULTILIB_OSDIRNAMES +=
> muclibc/mips32r2/mabi.32/EB/mnan.2008=!mips-r2-hard-nan2008-uclibc/lib
> +MULTILIB_REUSE +=
> muclibc/mips32r2/mabi.32/EB/mnan.2008=muclibc/mips64r2/mabi.32/EB/mnan.2008
> +
> +MULTILIB_REQUIRED += muclibc/mips32r2/mabi=32/EL
> +MULTILIB_OSDIRNAMES +=
> muclibc/mips32r2/mabi.32/EL=!mipsel-r2-hard-uclibc/lib
> +MULTILIB_REUSE +=
> muclibc/mips32r2/mabi.32/EL=muclibc/mips64r2/mabi.32/EL
> +MULTILIB_REQUIRED += muclibc/mips32r2/mabi=32/EL/mnan=2008
> +MULTILIB_OSDIRNAMES +=
> muclibc/mips32r2/mabi.32/EL/mnan.2008=!mipsel-r2-hard-nan2008-uclibc/lib
> +MULTILIB_REUSE +=
> muclibc/mips32r2/mabi.32/EL/mnan.2008=muclibc/mips64r2/mabi.32/EL/mnan.2008
> +endif
> diff --git a/gcc/config/mips/t-mti-elf b/gcc/config/mips/t-mti-elf
> deleted file mode 100644
> index 66717de..0000000
> --- a/gcc/config/mips/t-mti-elf
> +++ /dev/null
> @@ -1,48 +0,0 @@
> -# Copyright (C) 2012-2018 Free Software Foundation, Inc.
> -#
> -# This file is part of GCC.
> -#
> -# GCC is free software; you can redistribute it and/or modify
> -# it under the terms of the GNU General Public License as published by
> -# the Free Software Foundation; either version 3, or (at your option)
> -# any later version.
> -#
> -# GCC is distributed in the hope that it will be useful,
> -# but WITHOUT ANY WARRANTY; without even the implied warranty of
> -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> -# GNU General Public License for more details.
> -#
> -# You should have received a copy of the GNU General Public License
> -# along with GCC; see the file COPYING3. If not see
> -# <http://www.gnu.org/licenses/>.
> -
> -# The default build is mips32r2, hard-float big-endian. Add mips32,
> -# soft-float, and little-endian variations.
> -
> -MULTILIB_OPTIONS = mips32/mips64/mips64r2 mips16/mmicromips mabi=64 EL
> msoft-float mnan=2008
> -MULTILIB_DIRNAMES = mips32 mips64 mips64r2 mips16 micromips 64 el sof
> nan2008
> -MULTILIB_MATCHES = EL=mel EB=meb mips32r2=mips32r3 mips32r2=mips32r5
> mips64r2=mips64r3 mips64r2=mips64r5
> -
> -# The 64 bit ABI is not supported on the mips32 architecture.
> -MULTILIB_EXCEPTIONS += *mips32*/*mabi=64*
> -
> -# The 64 bit ABI is not supported on the mips32r2 architecture.
> -# Because mips32r2 is the default we can't use that flag to trigger
> -# the exception so we check for mabi=64 with no specific mips
> -# architecture flag instead.
> -MULTILIB_EXCEPTIONS += mabi=64*
> -
> -# We do not want to build mips16 versions of mips64* architectures.
> -MULTILIB_EXCEPTIONS += *mips64*/*mips16*
> -MULTILIB_EXCEPTIONS += *mips16/mabi=64*
> -
> -# We only want micromips for mips32r2 architecture.
> -MULTILIB_EXCEPTIONS += *mips32/mmicromips*
> -MULTILIB_EXCEPTIONS += *mips64*/mmicromips*
> -MULTILIB_EXCEPTIONS += *mmicromips/mabi=64*
> -
> -# We do not want nan2008 libraries for soft-float,
> -# mips32[r1], or mips64[r1].
> -MULTILIB_EXCEPTIONS += *msoft-float*/*mnan=2008*
> -MULTILIB_EXCEPTIONS += *mips32/*mnan=2008*
> -MULTILIB_EXCEPTIONS += *mips64/*mnan=2008*
> diff --git a/gcc/config/mips/t-mti-linux b/gcc/config/mips/t-mti-linux
> deleted file mode 100644
> index 2a69adb9..0000000
> --- a/gcc/config/mips/t-mti-linux
> +++ /dev/null
> @@ -1,158 +0,0 @@
> -# Copyright (C) 2012-2018 Free Software Foundation, Inc.
> -#
> -# This file is part of GCC.
> -#
> -# GCC is free software; you can redistribute it and/or modify
> -# it under the terms of the GNU General Public License as published by
> -# the Free Software Foundation; either version 3, or (at your option)
> -# any later version.
> -#
> -# GCC is distributed in the hope that it will be useful,
> -# but WITHOUT ANY WARRANTY; without even the implied warranty of
> -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> -# GNU General Public License for more details.
> -#
> -# You should have received a copy of the GNU General Public License
> -# along with GCC; see the file COPYING3. If not see
> -# <http://www.gnu.org/licenses/>.
> -
> -# The default build is mips32r2, hard-float big-endian. Add mips32,
> -# soft-float, and little-endian variations.
> -
> -MULTILIB_OPTIONS = mips32/mips64/mips64r2 mips16/mmicromips mabi=64 EL
> msoft-float mnan=2008
> -MULTILIB_DIRNAMES = mips32 mips64 mips64r2 mips16 micromips 64 el sof
> nan2008
> -MULTILIB_MATCHES = EL=mel EB=meb mips32r2=mips32r3 mips32r2=mips32r5
> mips64r2=mips64r3 mips64r2=mips64r5
> -
> -MULTILIB_REQUIRED =
> -MULTILIB_OSDIRNAMES = .=mips-r2-hard/lib
> -MULTILIB_REQUIRED += mips64r2
> -MULTILIB_OSDIRNAMES += mips64r2=!mips-r2-hard/lib32
> -MULTILIB_REQUIRED += mips64r2/mabi=64
> -MULTILIB_OSDIRNAMES += mips64r2/mabi.64=!mips-r2-hard/lib64
> -
> -MULTILIB_REQUIRED += mnan=2008
> -MULTILIB_OSDIRNAMES += mnan.2008=!mips-r2-hard-nan2008/lib
> -MULTILIB_REQUIRED += mips64r2/mnan=2008
> -MULTILIB_OSDIRNAMES += mips64r2/mnan.2008=!mips-r2-hard-nan2008/lib32
> -MULTILIB_REQUIRED += mips64r2/mabi=64/mnan=2008
> -MULTILIB_OSDIRNAMES +=
> mips64r2/mabi.64/mnan.2008=!mips-r2-hard-nan2008/lib64
> -
> -MULTILIB_REQUIRED += msoft-float
> -MULTILIB_OSDIRNAMES += msoft-float=!mips-r2-soft/lib
> -MULTILIB_REQUIRED += mips64r2/msoft-float
> -MULTILIB_OSDIRNAMES += mips64r2/msoft-float=!mips-r2-soft/lib32
> -MULTILIB_REQUIRED += mips64r2/mabi=64/msoft-float
> -MULTILIB_OSDIRNAMES += mips64r2/mabi.64/msoft-float=!mips-r2-soft/lib64
> -
> -#MULTILIB_REQUIRED += msoft-float/mnan=2008
> -#MULTILIB_OSDIRNAMES += msoft-float/mnan.2008=!mips-r2-soft-nan2008/lib
> -#MULTILIB_REQUIRED += mips64r2/msoft-float/mnan=2008
> -#MULTILIB_OSDIRNAMES +=
> mips64r2/msoft-float/mnan.2008=!mips-r2-soft-nan2008/lib32
> -#MULTILIB_REQUIRED += mips64r2/mabi=64/msoft-float/mnan=2008
> -#MULTILIB_OSDIRNAMES +=
> mips64r2/mabi.64/msoft-float/mnan.2008=!mips-r2-soft-nan2008/lib64
> -
> -MULTILIB_REQUIRED += EL
> -MULTILIB_OSDIRNAMES += EL=!mipsel-r2-hard/lib
> -MULTILIB_REQUIRED += mips64r2/EL
> -MULTILIB_OSDIRNAMES += mips64r2/EL=!mipsel-r2-hard/lib32
> -MULTILIB_REQUIRED += mips64r2/mabi=64/EL
> -MULTILIB_OSDIRNAMES += mips64r2/mabi.64/EL=!mipsel-r2-hard/lib64
> -
> -MULTILIB_REQUIRED += EL/mnan=2008
> -MULTILIB_OSDIRNAMES += EL/mnan.2008=!mipsel-r2-hard-nan2008/lib
> -MULTILIB_REQUIRED += mips64r2/EL/mnan=2008
> -MULTILIB_OSDIRNAMES += mips64r2/EL/mnan.2008=!mipsel-r2-hard-nan2008/lib32
> -MULTILIB_REQUIRED += mips64r2/mabi=64/EL/mnan=2008
> -MULTILIB_OSDIRNAMES +=
> mips64r2/mabi.64/EL/mnan.2008=!mipsel-r2-hard-nan2008/lib64
> -
> -MULTILIB_REQUIRED += EL/msoft-float
> -MULTILIB_OSDIRNAMES += EL/msoft-float=!mipsel-r2-soft/lib
> -MULTILIB_REQUIRED += mips64r2/EL/msoft-float
> -MULTILIB_OSDIRNAMES += mips64r2/EL/msoft-float=!mipsel-r2-soft/lib32
> -MULTILIB_REQUIRED += mips64r2/mabi=64/EL/msoft-float
> -MULTILIB_OSDIRNAMES +=
> mips64r2/mabi.64/EL/msoft-float=!mipsel-r2-soft/lib64
> -
> -#MULTILIB_REQUIRED += EL/msoft-float/mnan=2008
> -#MULTILIB_OSDIRNAMES +=
> EL/msoft-float/mnan.2008=!mipsel-r2-soft-nan2008/lib
> -#MULTILIB_REQUIRED += mips64r2/EL/msoft-float/mnan=2008
> -#MULTILIB_OSDIRNAMES +=
> mips64r2/EL/msoft-float/mnan.2008=!mipsel-r2-soft-nan2008/lib32
> -#MULTILIB_REQUIRED += mips64r2/mabi=64/EL/msoft-float/mnan=2008
> -#MULTILIB_OSDIRNAMES +=
> mips64r2/mabi.64/EL/msoft-float/mnan.2008=!mipsel-r2-soft-nan2008/lib64
> -
> -# We will not include any 64 bit mips16 combinations.
> -MULTILIB_REQUIRED += mips16
> -MULTILIB_OSDIRNAMES += mips16=!mips-r2-mips16-hard/lib
> -MULTILIB_REQUIRED += mips16/mnan=2008
> -MULTILIB_OSDIRNAMES += mips16/mnan.2008=!mips-r2-mips16-hard-nan2008/lib
> -MULTILIB_REQUIRED += mips16/msoft-float
> -MULTILIB_OSDIRNAMES += mips16/msoft-float=!mips-r2-mips16-soft/lib
> -#MULTILIB_REQUIRED += mips16/msoft-float/mnan=2008
> -#MULTILIB_OSDIRNAMES +=
> mips16/msoft-float/mnan.2008=!mips-r2-mips16-soft-nan2008/lib
> -
> -MULTILIB_REQUIRED += mips16/EL
> -MULTILIB_OSDIRNAMES += mips16/EL=!mipsel-r2-mips16-hard/lib
> -MULTILIB_REQUIRED += mips16/EL/mnan=2008
> -MULTILIB_OSDIRNAMES +=
> mips16/EL/mnan.2008=!mipsel-r2-mips16-hard-nan2008/lib
> -MULTILIB_REQUIRED += mips16/EL/msoft-float
> -MULTILIB_OSDIRNAMES += mips16/EL/msoft-float=!mipsel-r2-mips16-soft/lib
> -#MULTILIB_REQUIRED += mips16/EL/msoft-float/mnan=2008
> -#MULTILIB_OSDIRNAMES +=
> mips16/EL/msoft-float/mnan.2008=!mipsel-r2-mips16-soft-nan2008/lib
> -
> -MULTILIB_REQUIRED += mmicromips
> -MULTILIB_OSDIRNAMES += mmicromips=!micromips-r2-hard/lib
> -MULTILIB_REQUIRED += mmicromips/mnan=2008
> -MULTILIB_OSDIRNAMES += mmicromips/mnan.2008=!micromips-r2-hard-nan2008/lib
> -MULTILIB_REQUIRED += mmicromips/msoft-float
> -MULTILIB_OSDIRNAMES += mmicromips/msoft-float=!micromips-r2-soft/lib
> -#MULTILIB_REQUIRED += mmicromips/msoft-float/mnan=2008
> -#MULTILIB_OSDIRNAMES +=
> mmicromips/msoft-float/mnan.2008=!micromips-r2-soft-nan2008/lib
> -
> -MULTILIB_REQUIRED += mmicromips/EL
> -MULTILIB_OSDIRNAMES += mmicromips/EL=!micromipsel-r2-hard/lib
> -MULTILIB_REQUIRED += mmicromips/EL/mnan=2008
> -MULTILIB_OSDIRNAMES +=
> mmicromips/EL/mnan.2008=!micromipsel-r2-hard-nan2008/lib
> -MULTILIB_REQUIRED += mmicromips/EL/msoft-float
> -MULTILIB_OSDIRNAMES += mmicromips/EL/msoft-float=!micromipsel-r2-soft/lib
> -#MULTILIB_REQUIRED += mmicromips/EL/msoft-float/mnan=2008
> -#MULTILIB_OSDIRNAMES +=
> mmicromips/EL/msoft-float/mnan.2008=!micromipsel-r2-soft-nan2008/lib
> -
> -# Version 1 multilibs
> -
> -MULTILIB_REQUIRED += mips32
> -MULTILIB_OSDIRNAMES += mips32=!mips-r1-hard/lib
> -MULTILIB_REQUIRED += mips64
> -MULTILIB_OSDIRNAMES += mips64=!mips-r1-hard/lib32
> -MULTILIB_REQUIRED += mips64/mabi=64
> -MULTILIB_OSDIRNAMES += mips64/mabi.64=!mips-r1-hard/lib64
> -
> -MULTILIB_REQUIRED += mips32/msoft-float
> -MULTILIB_OSDIRNAMES += mips32/msoft-float=!mips-r1-soft/lib
> -MULTILIB_REQUIRED += mips64/msoft-float
> -MULTILIB_OSDIRNAMES += mips64/msoft-float=!mips-r1-soft/lib32
> -MULTILIB_REQUIRED += mips64/mabi=64/msoft-float
> -MULTILIB_OSDIRNAMES += mips64/mabi.64/msoft-float=!mips-r1-soft/lib64
> -
> -MULTILIB_REQUIRED += mips32/EL
> -MULTILIB_OSDIRNAMES += mips32/EL=!mipsel-r1-hard/lib
> -MULTILIB_REQUIRED += mips64/EL
> -MULTILIB_OSDIRNAMES += mips64/EL=!mipsel-r1-hard/lib32
> -MULTILIB_REQUIRED += mips64/mabi=64/EL
> -MULTILIB_OSDIRNAMES += mips64/mabi.64/EL=!mipsel-r1-hard/lib64
> -
> -MULTILIB_REQUIRED += mips32/EL/msoft-float
> -MULTILIB_OSDIRNAMES += mips32/EL/msoft-float=!mipsel-r1-soft/lib
> -MULTILIB_REQUIRED += mips64/EL/msoft-float
> -MULTILIB_OSDIRNAMES += mips64/EL/msoft-float=!mipsel-r1-soft/lib32
> -MULTILIB_REQUIRED += mips64/mabi=64/EL/msoft-float
> -MULTILIB_OSDIRNAMES += mips64/mabi.64/EL/msoft-float=!mipsel-r1-soft/lib64
> -
> -# We will not include any 64 bit mips16 combinations.
> -MULTILIB_REQUIRED += mips32/mips16
> -MULTILIB_OSDIRNAMES += mips32/mips16=!mips-r1-mips16-hard/lib
> -MULTILIB_REQUIRED += mips32/mips16/msoft-float
> -MULTILIB_OSDIRNAMES += mips32/mips16/msoft-float=!mips-r1-mips16-soft/lib
> -
> -MULTILIB_REQUIRED += mips32/mips16/EL
> -MULTILIB_OSDIRNAMES += mips32/mips16/EL=!mipsel-r1-mips16-hard/lib
> -MULTILIB_REQUIRED += mips32/mips16/EL/msoft-float
> -MULTILIB_OSDIRNAMES +=
> mips32/mips16/EL/msoft-float=!mipsel-r1-mips16-soft/lib
> diff --git a/gcc/configure.ac b/gcc/configure.ac
> index 010ecd2..01c5ae1 100644
> --- a/gcc/configure.ac
> +++ b/gcc/configure.ac
> @@ -811,6 +811,9 @@ AC_MSG_RESULT($enable_multiarch$ma_msg_suffix)
> AC_SUBST(with_cpu)
> AC_SUBST(with_float)
>
> +# needed for restricting the fixedincludes multilibs that we install
> +AC_SUBST(with_multi_buildlist)
> +
> # Enable __cxa_atexit for C++.
> AC_ARG_ENABLE(__cxa_atexit,
> [AS_HELP_STRING([--enable-__cxa_atexit], [enable __cxa_atexit for C++])],
> --
> 2.2.1
>
>
>
While you're changing stuff regarding multilib control, could you
please take a look at some of the bugs open regarding multilibs? For
example:
pr37704 re: libgcc: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=37704
pr38743 re: --disable-multilib:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38743
pr46981 re: LD_LIBRARY_PATH: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46981
pr69561 re: MULTILIB_EXCLUSIONS:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69561
Just some things I thought might be nice. Thanks!
Eric