--- /dev/null
+# ===========================================================================
+# 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 13
+
+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*|amd64*) # 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 ;;
+ *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" ;;
+ *[[1-9a-f]]?6??:*:*:*) ax_gcc_arch="core2 pentiumpro" ;;
+ *6[[3456]]?:*:*:*) ax_gcc_arch="pentium2 pentiumpro" ;;
+ *6a?:*[[01]]:*:*) ax_gcc_arch="pentium2 pentiumpro" ;;
+ *6a?:*[[234]]:*:*) ax_gcc_arch="pentium3 pentiumpro" ;;
+ *6[[9de]]?:*:*:*) ax_gcc_arch="pentium-m pentium3 pentiumpro" ;;
+ *6[[78b]]?:*:*:*) ax_gcc_arch="pentium3 pentiumpro" ;;
+ *6f?:*:*:*) ax_gcc_arch="core2 pentium-m pentium3 pentiumpro" ;;
+ *6??:*:*:*) ax_gcc_arch=pentiumpro ;;
+ *f3[[347]]:*:*:*|*f4[1347]:*:*:*|*f6?:*:*:*)
+ case $host_cpu in
+ x86_64*) ax_gcc_arch="nocona pentium4 pentiumpro" ;;
+ *) ax_gcc_arch="prescott pentium4 pentiumpro" ;;
+ esac ;;
+ *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 ;;
+ *5??f??:*:*:*) ax_gcc_arch="btver1 amdfam10 k8" ;;
+ *6??f??:*:*:*) ax_gcc_arch="bdver1 amdfam10 k8" ;;
+ *[[1-9a-f]]??f??:*:*:*) ax_gcc_arch="amdfam10 k8" ;;
+ *f[[4cef8b]]?:*:*:*) ax_gcc_arch="athlon64 k8" ;;
+ *f5?:*:*:*) ax_gcc_arch="opteron k8" ;;
+ *f7?:*:*:*) ax_gcc_arch="athlon-fx opteron k8" ;;
+ *f??:*:*:*) ax_gcc_arch="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 ' -' |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
+])
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