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-# ===========================================================================
-# http://www.gnu.org/software/autoconf-archive/ax_gcc_archflag.html
-# ===========================================================================
-#
-# SYNOPSIS
-#
-# AX_GCC_ARCHFLAG([PORTABLE?], [ACTION-SUCCESS], [ACTION-FAILURE])
-#
-# DESCRIPTION
-#
-# This macro tries to guess the "native" arch corresponding to the target
-# architecture for use with gcc's -march=arch or -mtune=arch flags. If
-# found, the cache variable $ax_cv_gcc_archflag is set to this flag and
-# ACTION-SUCCESS is executed; otherwise $ax_cv_gcc_archflag is set to
-# "unknown" and ACTION-FAILURE is executed. The default ACTION-SUCCESS is
-# to add $ax_cv_gcc_archflag to the end of $CFLAGS.
-#
-# PORTABLE? should be either [yes] (default) or [no]. In the former case,
-# the flag is set to -mtune (or equivalent) so that the architecture is
-# only used for tuning, but the instruction set used is still portable. In
-# the latter case, the flag is set to -march (or equivalent) so that
-# architecture-specific instructions are enabled.
-#
-# The user can specify --with-gcc-arch=<arch> in order to override the
-# macro's choice of architecture, or --without-gcc-arch to disable this.
-#
-# When cross-compiling, or if $CC is not gcc, then ACTION-FAILURE is
-# called unless the user specified --with-gcc-arch manually.
-#
-# Requires macros: AX_CHECK_COMPILE_FLAG, AX_GCC_X86_CPUID
-#
-# (The main emphasis here is on recent CPUs, on the principle that doing
-# high-performance computing on old hardware is uncommon.)
-#
-# LICENSE
-#
-# Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
-# Copyright (c) 2008 Matteo Frigo
-# Copyright (c) 2012 Tsukasa Oi
-#
-# This program 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 of the License, or (at your
-# option) any later version.
-#
-# This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
-#
-# As a special exception, the respective Autoconf Macro's copyright owner
-# gives unlimited permission to copy, distribute and modify the configure
-# scripts that are the output of Autoconf when processing the Macro. You
-# need not follow the terms of the GNU General Public License when using
-# or distributing such scripts, even though portions of the text of the
-# Macro appear in them. The GNU General Public License (GPL) does govern
-# all other use of the material that constitutes the Autoconf Macro.
-#
-# This special exception to the GPL applies to versions of the Autoconf
-# Macro released by the Autoconf Archive. When you make and distribute a
-# modified version of the Autoconf Macro, you may extend this special
-# exception to the GPL to apply to your modified version as well.
-
-#serial 11
-
-AC_DEFUN([AX_GCC_ARCHFLAG],
-[AC_REQUIRE([AC_PROG_CC])
-AC_REQUIRE([AC_CANONICAL_HOST])
-
-AC_ARG_WITH(gcc-arch, [AS_HELP_STRING([--with-gcc-arch=<arch>], [use architecture <arch> for gcc -march/-mtune, instead of guessing])],
- ax_gcc_arch=$withval, ax_gcc_arch=yes)
-
-AC_MSG_CHECKING([for gcc architecture flag])
-AC_MSG_RESULT([])
-AC_CACHE_VAL(ax_cv_gcc_archflag,
-[
-ax_cv_gcc_archflag="unknown"
-
-if test "$GCC" = yes; then
-
-if test "x$ax_gcc_arch" = xyes; then
-ax_gcc_arch=""
-if test "$cross_compiling" = no; then
-case $host_cpu in
- i[[3456]]86*|x86_64*) # use cpuid codes
- AX_GCC_X86_CPUID(0)
- AX_GCC_X86_CPUID(1)
- case $ax_cv_gcc_x86_cpuid_0 in
- *:756e6547:*:*) # Intel
- case $ax_cv_gcc_x86_cpuid_1 in
- *5[[48]]?:*:*:*) ax_gcc_arch="pentium-mmx pentium" ;;
- *5??:*:*:*) ax_gcc_arch=pentium ;;
- *0?6[[3456]]?:*:*:*) ax_gcc_arch="pentium2 pentiumpro" ;;
- *0?6a?:*[[01]]:*:*) ax_gcc_arch="pentium2 pentiumpro" ;;
- *0?6a?:*[[234]]:*:*) ax_gcc_arch="pentium3 pentiumpro" ;;
- *0?6[[9de]]?:*:*:*) ax_gcc_arch="pentium-m pentium3 pentiumpro" ;;
- *0?6[[78b]]?:*:*:*) ax_gcc_arch="pentium3 pentiumpro" ;;
- *0?6f?:*:*:*|*1?66?:*:*:*) ax_gcc_arch="core2 pentium-m pentium3 pentiumpro" ;;
- *1?6[[7d]]?:*:*:*) ax_gcc_arch="penryn core2 pentium-m pentium3 pentiumpro" ;;
- *1?6[[aef]]?:*:*:*|*2?6[[5cef]]?:*:*:*) ax_gcc_arch="corei7 core2 pentium-m pentium3 pentiumpro" ;;
- *1?6c?:*:*:*|*[[23]]?66?:*:*:*) ax_gcc_arch="atom core2 pentium-m pentium3 pentiumpro" ;;
- *2?6[[ad]]?:*:*:*) ax_gcc_arch="corei7-avx corei7 core2 pentium-m pentium3 pentiumpro" ;;
- *0?6??:*:*:*) ax_gcc_arch=pentiumpro ;;
- *6??:*:*:*) ax_gcc_arch="core2 pentiumpro" ;;
- ?000?f3[[347]]:*:*:*|?000?f4[1347]:*:*:*|?000?f6?:*:*:*)
- case $host_cpu in
- x86_64*) ax_gcc_arch="nocona pentium4 pentiumpro" ;;
- *) ax_gcc_arch="prescott pentium4 pentiumpro" ;;
- esac ;;
- ?000?f??:*:*:*) ax_gcc_arch="pentium4 pentiumpro";;
- esac ;;
- *:68747541:*:*) # AMD
- case $ax_cv_gcc_x86_cpuid_1 in
- *5[[67]]?:*:*:*) ax_gcc_arch=k6 ;;
- *5[[8d]]?:*:*:*) ax_gcc_arch="k6-2 k6" ;;
- *5[[9]]?:*:*:*) ax_gcc_arch="k6-3 k6" ;;
- *60?:*:*:*) ax_gcc_arch=k7 ;;
- *6[[12]]?:*:*:*) ax_gcc_arch="athlon k7" ;;
- *6[[34]]?:*:*:*) ax_gcc_arch="athlon-tbird k7" ;;
- *67?:*:*:*) ax_gcc_arch="athlon-4 athlon k7" ;;
- *6[[68a]]?:*:*:*)
- AX_GCC_X86_CPUID(0x80000006) # L2 cache size
- case $ax_cv_gcc_x86_cpuid_0x80000006 in
- *:*:*[[1-9a-f]]??????:*) # (L2 = ecx >> 16) >= 256
- ax_gcc_arch="athlon-xp athlon-4 athlon k7" ;;
- *) ax_gcc_arch="athlon-4 athlon k7" ;;
- esac ;;
- ?00??f[[4cef8b]]?:*:*:*) ax_gcc_arch="athlon64 k8" ;;
- ?00??f5?:*:*:*) ax_gcc_arch="opteron k8" ;;
- ?00??f7?:*:*:*) ax_gcc_arch="athlon-fx opteron k8" ;;
- ?00??f??:*:*:*) ax_gcc_arch="k8" ;;
- ?05??f??:*:*:*) ax_gcc_arch="btver1 amdfam10 k8" ;;
- ?06??f??:*:*:*) ax_gcc_arch="bdver1 amdfam10 k8" ;;
- *f??:*:*:*) ax_gcc_arch="amdfam10 k8" ;;
- esac ;;
- *:746e6543:*:*) # IDT
- case $ax_cv_gcc_x86_cpuid_1 in
- *54?:*:*:*) ax_gcc_arch=winchip-c6 ;;
- *58?:*:*:*) ax_gcc_arch=winchip2 ;;
- *6[[78]]?:*:*:*) ax_gcc_arch=c3 ;;
- *69?:*:*:*) ax_gcc_arch="c3-2 c3" ;;
- esac ;;
- esac
- if test x"$ax_gcc_arch" = x; then # fallback
- case $host_cpu in
- i586*) ax_gcc_arch=pentium ;;
- i686*) ax_gcc_arch=pentiumpro ;;
- esac
- fi
- ;;
-
- sparc*)
- AC_PATH_PROG([PRTDIAG], [prtdiag], [prtdiag], [$PATH:/usr/platform/`uname -i`/sbin/:/usr/platform/`uname -m`/sbin/])
- cputype=`(((grep cpu /proc/cpuinfo | cut -d: -f2) ; ($PRTDIAG -v |grep -i sparc) ; grep -i cpu /var/run/dmesg.boot ) | head -n 1) 2> /dev/null`
- cputype=`echo "$cputype" | tr -d ' -' | sed 's/SPARCIIi/SPARCII/' | tr $as_cr_LETTERS $as_cr_letters`
- case $cputype in
- *ultrasparciv*) ax_gcc_arch="ultrasparc4 ultrasparc3 ultrasparc v9" ;;
- *ultrasparciii*) ax_gcc_arch="ultrasparc3 ultrasparc v9" ;;
- *ultrasparc*) ax_gcc_arch="ultrasparc v9" ;;
- *supersparc*|*tms390z5[[05]]*) ax_gcc_arch="supersparc v8" ;;
- *hypersparc*|*rt62[[056]]*) ax_gcc_arch="hypersparc v8" ;;
- *cypress*) ax_gcc_arch=cypress ;;
- esac ;;
-
- alphaev5) ax_gcc_arch=ev5 ;;
- alphaev56) ax_gcc_arch=ev56 ;;
- alphapca56) ax_gcc_arch="pca56 ev56" ;;
- alphapca57) ax_gcc_arch="pca57 pca56 ev56" ;;
- alphaev6) ax_gcc_arch=ev6 ;;
- alphaev67) ax_gcc_arch=ev67 ;;
- alphaev68) ax_gcc_arch="ev68 ev67" ;;
- alphaev69) ax_gcc_arch="ev69 ev68 ev67" ;;
- alphaev7) ax_gcc_arch="ev7 ev69 ev68 ev67" ;;
- alphaev79) ax_gcc_arch="ev79 ev7 ev69 ev68 ev67" ;;
-
- powerpc*)
- cputype=`((grep cpu /proc/cpuinfo | head -n 1 | cut -d: -f2 | cut -d, -f1 | sed 's/ //g') ; /usr/bin/machine ; /bin/machine; grep CPU /var/run/dmesg.boot | head -n 1 | cut -d" " -f2) 2> /dev/null`
- cputype=`echo $cputype | sed -e 's/ppc//g;s/ *//g'`
- case $cputype in
- *750*) ax_gcc_arch="750 G3" ;;
- *740[[0-9]]*) ax_gcc_arch="$cputype 7400 G4" ;;
- *74[[4-5]][[0-9]]*) ax_gcc_arch="$cputype 7450 G4" ;;
- *74[[0-9]][[0-9]]*) ax_gcc_arch="$cputype G4" ;;
- *970*) ax_gcc_arch="970 G5 power4";;
- *POWER4*|*power4*|*gq*) ax_gcc_arch="power4 970";;
- *POWER5*|*power5*|*gr*|*gs*) ax_gcc_arch="power5 power4 970";;
- 603ev|8240) ax_gcc_arch="$cputype 603e 603";;
- *) ax_gcc_arch=$cputype ;;
- esac
- ax_gcc_arch="$ax_gcc_arch powerpc"
- ;;
-esac
-fi # not cross-compiling
-fi # guess arch
-
-if test "x$ax_gcc_arch" != x -a "x$ax_gcc_arch" != xno; then
-for arch in $ax_gcc_arch; do
- if test "x[]m4_default([$1],yes)" = xyes; then # if we require portable code
- flags="-mtune=$arch"
- # -mcpu=$arch and m$arch generate nonportable code on every arch except
- # x86. And some other arches (e.g. Alpha) don't accept -mtune. Grrr.
- case $host_cpu in i*86|x86_64*) flags="$flags -mcpu=$arch -m$arch";; esac
- else
- flags="-march=$arch -mcpu=$arch -m$arch"
- fi
- for flag in $flags; do
- AX_CHECK_COMPILE_FLAG($flag, [ax_cv_gcc_archflag=$flag; break])
- done
- test "x$ax_cv_gcc_archflag" = xunknown || break
-done
-fi
-
-fi # $GCC=yes
-])
-AC_MSG_CHECKING([for gcc architecture flag])
-AC_MSG_RESULT($ax_cv_gcc_archflag)
-if test "x$ax_cv_gcc_archflag" = xunknown; then
- m4_default([$3],:)
-else
- m4_default([$2], [CFLAGS="$CFLAGS $ax_cv_gcc_archflag"])
-fi
-])