149 lines
5.9 KiB
Plaintext
149 lines
5.9 KiB
Plaintext
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AC_DEFUN([AX_GCC_ARCHFLAG],
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[AC_REQUIRE([AC_PROG_CC])
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AC_ARG_WITH(gcc-arch, [AC_HELP_STRING([--with-gcc-arch=<arch>], [use architecture <arch> for gcc -march/-mtune, instead of guessing])],
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ax_gcc_arch=$withval, ax_gcc_arch=yes)
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AC_MSG_CHECKING([for gcc architecture flag])
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AC_MSG_RESULT([])
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AC_CACHE_VAL(ax_cv_gcc_archflag,
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[
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ax_cv_gcc_archflag="unknown"
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if test "$GCC" = yes; then
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if test "x$ax_gcc_arch" = xyes; then
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ax_gcc_arch=""
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if test "$cross_compiling" = no; then
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case $host_cpu in
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i[[3456]]86*|x86_64*) # use cpuid codes, in part from x86info-1.7 by D. Jones
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AX_GCC_X86_CPUID(0)
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AX_GCC_X86_CPUID(1)
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case $ax_cv_gcc_x86_cpuid_0 in
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*:756e6547:*:*) # Intel
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case $ax_cv_gcc_x86_cpuid_1 in
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*5[[48]]?:*:*:*) ax_gcc_arch="pentium-mmx pentium" ;;
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*5??:*:*:*) ax_gcc_arch=pentium ;;
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*6[[3456]]?:*:*:*) ax_gcc_arch="pentium2 pentiumpro" ;;
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*6a?:*[[01]]:*:*) ax_gcc_arch="pentium2 pentiumpro" ;;
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*6a?:*[[234]]:*:*) ax_gcc_arch="pentium3 pentiumpro" ;;
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*6[[9d]]?:*:*:*) ax_gcc_arch="pentium-m pentium3 pentiumpro" ;;
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*6[[78b]]?:*:*:*) ax_gcc_arch="pentium3 pentiumpro" ;;
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*6??:*:*:*) ax_gcc_arch=pentiumpro ;;
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*f3[[347]]:*:*:*|*f4[1347]:*:*:*)
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case $host_cpu in
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x86_64*) ax_gcc_arch="nocona pentium4 pentiumpro" ;;
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*) ax_gcc_arch="prescott pentium4 pentiumpro" ;;
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esac ;;
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*f??:*:*:*) ax_gcc_arch="pentium4 pentiumpro";;
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esac ;;
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*:68747541:*:*) # AMD
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case $ax_cv_gcc_x86_cpuid_1 in
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*5[[67]]?:*:*:*) ax_gcc_arch=k6 ;;
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*5[[8d]]?:*:*:*) ax_gcc_arch="k6-2 k6" ;;
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*5[[9]]?:*:*:*) ax_gcc_arch="k6-3 k6" ;;
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*60?:*:*:*) ax_gcc_arch=k7 ;;
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*6[[12]]?:*:*:*) ax_gcc_arch="athlon k7" ;;
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*6[[34]]?:*:*:*) ax_gcc_arch="athlon-tbird k7" ;;
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*67?:*:*:*) ax_gcc_arch="athlon-4 athlon k7" ;;
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*6[[68a]]?:*:*:*)
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AX_GCC_X86_CPUID(0x80000006) # L2 cache size
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case $ax_cv_gcc_x86_cpuid_0x80000006 in
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*:*:*[[1-9a-f]]??????:*) # (L2 = ecx >> 16) >= 256
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ax_gcc_arch="athlon-xp athlon-4 athlon k7" ;;
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*) ax_gcc_arch="athlon-4 athlon k7" ;;
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esac ;;
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*f[[4cef8b]]?:*:*:*) ax_gcc_arch="athlon64 k8" ;;
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*f5?:*:*:*) ax_gcc_arch="opteron k8" ;;
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*f7?:*:*:*) ax_gcc_arch="athlon-fx opteron k8" ;;
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*f??:*:*:*) ax_gcc_arch="k8" ;;
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esac ;;
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*:746e6543:*:*) # IDT
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case $ax_cv_gcc_x86_cpuid_1 in
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*54?:*:*:*) ax_gcc_arch=winchip-c6 ;;
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*58?:*:*:*) ax_gcc_arch=winchip2 ;;
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*6[[78]]?:*:*:*) ax_gcc_arch=c3 ;;
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*69?:*:*:*) ax_gcc_arch="c3-2 c3" ;;
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esac ;;
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esac
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if test x"$ax_gcc_arch" = x; then # fallback
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case $host_cpu in
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i586*) ax_gcc_arch=pentium ;;
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i686*) ax_gcc_arch=pentiumpro ;;
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esac
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fi
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;;
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sparc*)
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AC_PATH_PROG([PRTDIAG], [prtdiag], [prtdiag], [$PATH:/usr/platform/`uname -i`/sbin/:/usr/platform/`uname -m`/sbin/])
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cputype=`(((grep cpu /proc/cpuinfo | cut -d: -f2) ; ($PRTDIAG -v |grep -i sparc) ; grep -i cpu /var/run/dmesg.boot ) | head -n 1) 2> /dev/null`
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cputype=`echo "$cputype" | tr -d ' -' |tr $as_cr_LETTERS $as_cr_letters`
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case $cputype in
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*ultrasparciv*) ax_gcc_arch="ultrasparc4 ultrasparc3 ultrasparc v9" ;;
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*ultrasparciii*) ax_gcc_arch="ultrasparc3 ultrasparc v9" ;;
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*ultrasparc*) ax_gcc_arch="ultrasparc v9" ;;
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*supersparc*|*tms390z5[[05]]*) ax_gcc_arch="supersparc v8" ;;
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*hypersparc*|*rt62[[056]]*) ax_gcc_arch="hypersparc v8" ;;
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*cypress*) ax_gcc_arch=cypress ;;
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esac ;;
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alphaev5) ax_gcc_arch=ev5 ;;
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alphaev56) ax_gcc_arch=ev56 ;;
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alphapca56) ax_gcc_arch="pca56 ev56" ;;
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alphapca57) ax_gcc_arch="pca57 pca56 ev56" ;;
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alphaev6) ax_gcc_arch=ev6 ;;
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alphaev67) ax_gcc_arch=ev67 ;;
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alphaev68) ax_gcc_arch="ev68 ev67" ;;
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alphaev69) ax_gcc_arch="ev69 ev68 ev67" ;;
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alphaev7) ax_gcc_arch="ev7 ev69 ev68 ev67" ;;
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alphaev79) ax_gcc_arch="ev79 ev7 ev69 ev68 ev67" ;;
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powerpc*)
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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`
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cputype=`echo $cputype | sed -e 's/ppc//g;s/ *//g'`
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case $cputype in
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*750*) ax_gcc_arch="750 G3" ;;
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*740[[0-9]]*) ax_gcc_arch="$cputype 7400 G4" ;;
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*74[[4-5]][[0-9]]*) ax_gcc_arch="$cputype 7450 G4" ;;
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*74[[0-9]][[0-9]]*) ax_gcc_arch="$cputype G4" ;;
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*970*) ax_gcc_arch="970 G5 power4";;
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*POWER4*|*power4*|*gq*) ax_gcc_arch="power4 970";;
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*POWER5*|*power5*|*gr*|*gs*) ax_gcc_arch="power5 power4 970";;
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603ev|8240) ax_gcc_arch="$cputype 603e 603";;
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*) ax_gcc_arch=$cputype ;;
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esac
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ax_gcc_arch="$ax_gcc_arch powerpc"
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;;
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esac
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fi # not cross-compiling
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fi # guess arch
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if test "x$ax_gcc_arch" != x -a "x$ax_gcc_arch" != xno; then
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for arch in $ax_gcc_arch; do
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if test "x[]m4_default([$1],yes)" = xyes; then # if we require portable code
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flags="-mtune=$arch"
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# -mcpu=$arch and m$arch generate nonportable code on every arch except
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# x86. And some other arches (e.g. Alpha) don't accept -mtune. Grrr.
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case $host_cpu in i*86|x86_64*) flags="$flags -mcpu=$arch -m$arch";; esac
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else
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flags="-march=$arch -mcpu=$arch -m$arch"
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fi
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for flag in $flags; do
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AX_CHECK_COMPILER_FLAGS($flag, [ax_cv_gcc_archflag=$flag; break])
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done
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test "x$ax_cv_gcc_archflag" = xunknown || break
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done
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fi
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fi # $GCC=yes
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])
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AC_MSG_CHECKING([for gcc architecture flag])
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AC_MSG_RESULT($ax_cv_gcc_archflag)
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if test "x$ax_cv_gcc_archflag" = xunknown; then
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m4_default([$3],:)
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else
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m4_default([$2], [CFLAGS="$CFLAGS $ax_cv_gcc_archflag"])
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fi
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])
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