Mercurial > sdl-ios-xcode
changeset 5029:5d7d48157be7
Greg Jandl to SDL
I did some digging, and I think I've found a better solution. By
including some additional .m4 macros in the acinclude directory
(http://www.gnu.org/software/autoconf-archive/ax_check_compiler_flags.html,
http://www.gnu.org/software/autoconf-archive/ax_gcc_archflag.html and
http://www.gnu.org/software/autoconf-archive/ax_gcc_x86_cpuid.html)
then using the patch below (same as previous patch + one line change
to configure.in), SDL will build correctly out of the box.
The arch can then be overridden by --with-gcc-arch=<arch> (most will
probably want to build with i686 there for general distribution) or
--without-gcc-arch, to disable setting the arch all together.
On my Atom netbook, I get -march=PentiumPro by default, which works
great, as does --with-gcc-arch=i686.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 18 Jan 2011 22:40:45 -0800 |
| parents | fffb33ae85e8 |
| children | 6a0803e47c7b |
| files | acinclude/ax_check_compiler_flags.m4 acinclude/ax_gcc_archflag.m4 acinclude/ax_gcc_x86_cpuid.m4.htm configure.in |
| diffstat | 4 files changed, 371 insertions(+), 0 deletions(-) [+] |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/acinclude/ax_check_compiler_flags.m4 Tue Jan 18 22:40:45 2011 -0800 @@ -0,0 +1,76 @@ +# =========================================================================== +# http://www.gnu.org/software/autoconf-archive/ax_check_compiler_flags.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_CHECK_COMPILER_FLAGS(FLAGS, [ACTION-SUCCESS], [ACTION-FAILURE]) +# +# DESCRIPTION +# +# Check whether the given compiler FLAGS work with the current language's +# compiler, or whether they give an error. (Warnings, however, are +# ignored.) +# +# ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on +# success/failure. +# +# LICENSE +# +# Copyright (c) 2009 Steven G. Johnson <stevenj@alum.mit.edu> +# Copyright (c) 2009 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 9 + +AC_DEFUN([AX_CHECK_COMPILER_FLAGS], +[AC_PREREQ(2.59) dnl for _AC_LANG_PREFIX +AC_MSG_CHECKING([whether _AC_LANG compiler accepts $1]) +dnl Some hackery here since AC_CACHE_VAL can't handle a non-literal varname: +AS_LITERAL_IF([$1], + [AC_CACHE_VAL(AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1]), [ + ax_save_FLAGS=$[]_AC_LANG_PREFIX[]FLAGS + _AC_LANG_PREFIX[]FLAGS="$1" + AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], + AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1])=yes, + AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1])=no) + _AC_LANG_PREFIX[]FLAGS=$ax_save_FLAGS])], + [ax_save_FLAGS=$[]_AC_LANG_PREFIX[]FLAGS + _AC_LANG_PREFIX[]FLAGS="$1" + AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], + eval AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1])=yes, + eval AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1])=no) + _AC_LANG_PREFIX[]FLAGS=$ax_save_FLAGS]) +eval ax_check_compiler_flags=$AS_TR_SH(ax_cv_[]_AC_LANG_ABBREV[]_flags_[$1]) +AC_MSG_RESULT($ax_check_compiler_flags) +if test "x$ax_check_compiler_flags" = xyes; then + m4_default([$2], :) +else + m4_default([$3], :) +fi +])dnl AX_CHECK_COMPILER_FLAGS
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/acinclude/ax_gcc_archflag.m4 Tue Jan 18 22:40:45 2011 -0800 @@ -0,0 +1,215 @@ +# =========================================================================== +# 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 +])
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/acinclude/ax_gcc_x86_cpuid.m4.htm Tue Jan 18 22:40:45 2011 -0800 @@ -0,0 +1,79 @@ +# =========================================================================== +# http://www.gnu.org/software/autoconf-archive/ax_gcc_x86_cpuid.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_GCC_X86_CPUID(OP) +# +# DESCRIPTION +# +# On Pentium and later x86 processors, with gcc or a compiler that has a +# compatible syntax for inline assembly instructions, run a small program +# that executes the cpuid instruction with input OP. This can be used to +# detect the CPU type. +# +# On output, the values of the eax, ebx, ecx, and edx registers are stored +# as hexadecimal strings as "eax:ebx:ecx:edx" in the cache variable +# ax_cv_gcc_x86_cpuid_OP. +# +# If the cpuid instruction fails (because you are running a +# cross-compiler, or because you are not using gcc, or because you are on +# a processor that doesn't have this instruction), ax_cv_gcc_x86_cpuid_OP +# is set to the string "unknown". +# +# This macro mainly exists to be used in AX_GCC_ARCHFLAG. +# +# 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 7 + +AC_DEFUN([AX_GCC_X86_CPUID], +[AC_REQUIRE([AC_PROG_CC]) +AC_LANG_PUSH([C]) +AC_CACHE_CHECK(for x86 cpuid $1 output, ax_cv_gcc_x86_cpuid_$1, + [AC_RUN_IFELSE([AC_LANG_PROGRAM([#include <stdio.h>], [ + int op = $1, eax, ebx, ecx, edx; + FILE *f; + __asm__("cpuid" + : "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx) + : "a" (op)); + f = fopen("conftest_cpuid", "w"); if (!f) return 1; + fprintf(f, "%x:%x:%x:%x\n", eax, ebx, ecx, edx); + fclose(f); + return 0; +])], + [ax_cv_gcc_x86_cpuid_$1=`cat conftest_cpuid`; rm -f conftest_cpuid], + [ax_cv_gcc_x86_cpuid_$1=unknown; rm -f conftest_cpuid], + [ax_cv_gcc_x86_cpuid_$1=unknown])]) +AC_LANG_POP([C]) +])