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0411ae7f08
The recent changes to error on mixing -march=i386 and -fcf-protection broke
bootstrap. This patch changes lib{atomic,gomp,itm} configury, so that it
only adds -march=i486 to flags if really needed (i.e. when 486 or later isn't
on by default already). Similarly, it will not use ifuncs if -mcx16
(or -march=i686 for 32-bit) is on by default.
2021-01-15 Jakub Jelinek <jakub@redhat.com>
PR target/70454
libatomic/
* configure.tgt: For i?86 and x86_64 determine if -march=i486 needs to
be added through preprocessor check on
__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4. Determine if try_ifunc is needed
based on preprocessor check on __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16
or __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8.
libgomp/
* configure.tgt: For i?86 and x86_64 determine if -march=i486 needs to
be added through preprocessor check on
__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4.
libitm/
* configure.tgt: For i?86 and x86_64 determine if -march=i486 needs to
be added through preprocessor check on
__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4.
159 lines
4.0 KiB
Bash
159 lines
4.0 KiB
Bash
# -*- shell-script -*-
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# Copyright (C) 2011-2021 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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# This is the target specific configuration file. This is invoked by the
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# autoconf generated configure script. Putting it in a separate shell file
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# lets us skip running autoconf when modifying target specific information.
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# This file switches on the shell variable ${target}, and sets the
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# following shell variables:
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# config_path An ordered list of directories to search for
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# sources and headers. This is relative to the
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# config subdirectory of the source tree.
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# XCFLAGS Add extra compile flags to use.
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# XLDFLAGS Add extra link flags to use.
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# Optimize TLS usage by avoiding the overhead of dynamic allocation.
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if test "$gcc_cv_have_tls" = yes ; then
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case "${target}" in
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*-*-musl*)
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;;
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# For x86, we use slots in the TCB head for most of our TLS.
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# The setup of those slots in beginTransaction can afford to
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# use the global-dynamic model.
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i[456]86-*-linux* | x86_64-*-linux*)
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;;
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*-*-linux*)
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XCFLAGS="${XCFLAGS} -ftls-model=initial-exec"
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;;
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esac
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fi
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# Map the target cpu to an ARCH sub-directory. At the same time,
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# work out any special compilation flags as necessary.
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case "${target_cpu}" in
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aarch64*) ARCH=aarch64 ;;
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alpha*) ARCH=alpha ;;
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rs6000 | powerpc*)
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XCFLAGS="${XCFLAGS} -mhtm"
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ARCH=powerpc
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;;
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arm*) ARCH=arm ;;
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i[3456]86 | x86_64)
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cat > conftestx.c <<EOF
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#ifndef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4
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#error need -march=i486
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#endif
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EOF
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if ${CC} ${CFLAGS} -E conftestx.c > /dev/null 2>&1; then
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:
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else
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if test "${target_cpu}" = x86_64; then
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XCFLAGS="${XCFLAGS} -march=i486 -mtune=generic"
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else
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XCFLAGS="${XCFLAGS} -march=i486 -mtune=${target_cpu}"
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fi
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XCFLAGS="${XCFLAGS} -fomit-frame-pointer"
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fi
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rm -f conftestx.c
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XCFLAGS="${XCFLAGS} -mrtm"
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ARCH=x86
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;;
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sh*) ARCH=sh ;;
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sparc)
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case " ${CC} ${CFLAGS} " in
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*" -m64 "*)
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;;
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*)
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if test -z "$with_cpu"; then
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XCFLAGS="${XCFLAGS} -mcpu=v9"
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fi
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esac
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ARCH=sparc
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;;
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sparc64|sparcv9)
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case " ${CC} ${CFLAGS} " in
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*" -m32 "*)
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XCFLAGS="${XCFLAGS} -mcpu=v9"
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;;
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*" -m64 "*)
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;;
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*)
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if test "x$with_cpu" = xv8; then
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XCFLAGS="${XCFLAGS} -mcpu=v9"
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fi
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;;
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esac
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ARCH=sparc
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;;
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s390|s390x)
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XCFLAGS="${XCFLAGS} -mzarch -mhtm"
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ARCH=s390
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;;
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*)
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ARCH="${target_cpu}"
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;;
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esac
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# For the benefit of top-level configure, determine if the cpu is supported.
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test -d ${srcdir}/config/$ARCH || UNSUPPORTED=1
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# Since we require POSIX threads, assume a POSIX system by default.
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config_path="$ARCH posix generic"
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# Other system configury
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case "${target}" in
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*-*-linux* | *-*-uclinux*)
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if test "$enable_linux_futex" = yes; then
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config_path="linux/$ARCH linux $config_path"
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fi
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;;
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powerpc*-*-aix* | rs6000-*-aix*)
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# The system ought to be supported, but sjlj.S has not been ported.
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UNSUPPORTED=1
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;;
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*-*-gnu* | *-*-k*bsd*-gnu \
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| *-*-netbsd* | *-*-freebsd* | *-*-openbsd* \
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| *-*-solaris2* | *-*-sysv4* | *-*-hpux11* \
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| *-*-aix* | *-*-dragonfly*)
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# POSIX system. The OS is supported.
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;;
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*-*-darwin*)
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# The OS is supported, but we need dynamic lookup to support undefined
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# weak symbols at link-time.
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XLDFLAGS="${XLDFLAGS} -Wl,-undefined,dynamic_lookup"
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;;
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*) # Non-POSIX, or embedded system
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UNSUPPORTED=1
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;;
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esac
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