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Diffstat (limited to 'm4/ax_gcc_archflag.m4')
| -rw-r--r-- | m4/ax_gcc_archflag.m4 | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/m4/ax_gcc_archflag.m4 b/m4/ax_gcc_archflag.m4 new file mode 100644 index 0000000..590015b --- /dev/null +++ b/m4/ax_gcc_archflag.m4 @@ -0,0 +1,213 @@ +# =========================================================================== +# http://autoconf-archive.cryp.to/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 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_COMPILER_FLAGS, 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 +# +# 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. + +AC_DEFUN([AX_GCC_ARCHFLAG], +[AC_REQUIRE([AC_PROG_CC]) +AC_REQUIRE([AC_CANONICAL_HOST]) + +AC_ARG_WITH(gcc-arch, [AC_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, in part from x86info-1.7 by D. Jones + 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 ;; + *6[[3456]]?:*:*:*) ax_gcc_arch="pentium2 pentiumpro" ;; + *6a?:*[[01]]:*:*) ax_gcc_arch="pentium2 pentiumpro" ;; + *6a?:*[[234]]:*:*) ax_gcc_arch="pentium3 pentiumpro" ;; + *6[[9d]]?:*:*:*) ax_gcc_arch="pentium-m pentium3 pentiumpro" ;; + *6[[78b]]?:*:*:*) ax_gcc_arch="pentium3 pentiumpro" ;; + *6??:*:*:*) ax_gcc_arch=pentiumpro ;; + *f3[[347]]:*:*:*|*f4[1347]:*:*:*) + 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 ;; + *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 $flags; do + AX_CHECK_COMPILER_FLAGS($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 +]) |