kc3-lang/SDL/acinclude/ax_gcc_archflag.m4
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Hash : 3dcb451f
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Date : 2014-04-09T21:29:19
Added a README file regarding WinRT support To note, this file is currently formatted with CRLF line endings, rather than LF, to allow the file to be viewed with Notepad.
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acinclude/ax_gcc_archflag.m4
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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 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. #serial 8 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, 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 ])