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dnl
dnl M4 macro to add support for extra optimizations
dnl
dnl It understand --enable/--disable-optimizations .
dnl when optimizations are disabled, it does not touch cflags
dnl
dnl Note: always disable while crosscompiling
dnl
AC_DEFUN([AC_OPTIMIZATIONS], [
AC_ARG_ENABLE([optimizations],
AS_HELP_STRING([--disable-optimizations], [Don't try to guess what optimization to enable]))
if test "x$enable_optimizations" != "xno"; then
INLINE_FUNCTIONS=-finline-functions
if test "$GCC" = yes; then
dnl
dnl check cflags not supported by all gcc versions
AC_TRY_CFLAGS("-fschedule-insns2", f_si="-fschedule-insns2", f_si="")
AC_TRY_CFLAGS("-mwide-multiply", m_wm="-mwide-multiply", m_wm="")
dnl
dnl gcc 3.1 uses the -f version
dnl
AC_TRY_CFLAGS("-falign-functions=4", f_af="-falign-functions=4",
f_af="-malign-functions=4")
AC_TRY_CFLAGS("-falign-loops=4", f_al="-falign-loops=4",
f_al="-malign-loops=4")
AC_TRY_CFLAGS("-falign-jumps=4", f_aj="-falign-jumps=4",
f_aj="-malign-jumps=4")
dnl
dnl Check for some optimization disabling
dnl needed for win32 code
dnl
AC_TRY_CFLAGS("-fno-omit-frame-pointer", W32_NO_OPTIMIZE="$W32_NO_OPTIMIZE -fno-omit-frame-pointer",)
AC_TRY_CFLAGS("-fno-inline-functions", W32_NO_OPTIMIZE="$W32_NO_OPTIMIZE -fno-inline-functions",)
AC_TRY_CFLAGS("-fno-rename-registers", W32_NO_OPTIMIZE="$W32_NO_OPTIMIZE -fno-rename-registers",)
AC_SUBST(W32_NO_OPTIMIZE)
dnl
dnl Multipass compilation
dnl
AC_TRY_CFLAGS("-fprofile-arcs", PASS1_CFLAGS="-fprofile_arcs $PASS1_CFLAGS",)
AC_TRY_CFLAGS("-fbranch-probabilities", PASS2_CFLAGS="-fbranch-probabilities $PASS2_CFLAGS",)
AC_SUBST(PASS1_CFLAGS)
AC_SUBST(PASS2_CFLAGS)
dnl
dnl Warnings
dnl
CFLAGS="-Wchar-subscripts -Wmissing-declarations -Wmissing-prototypes $CFLAGS"
CFLAGS="-Wnested-externs -Wcast-align $CFLAGS"
dnl some combinations of gcc+glibc produce useless warnings on memset
dnl when compiling with -Wpointer-arith, so we check for this first
AC_MSG_CHECKING(for sane -Wpointer-arith)
SAVE_CFLAGS="$CFLAGS"
CFLAGS="-O2 -Wpointer-arith -Werror $CFLAGS"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <string.h>]], [[int a; memset(&a, 0, sizeof(int));]])],
[AC_MSG_RESULT(yes); CFLAGS="-Wpointer-arith $SAVE_CFLAGS"],
[AC_MSG_RESULT(no); CFLAGS="$SAVE_CFLAGS"]);
dnl gcc 3.3.5 (at least) is known to be buggy wrt optimisation and
dnl -finline-functions. Use -fno-inline-functions for gcc < 3.4.0.
AC_MSG_CHECKING(for gcc 3.4.0 or later)
newGCC="`"$CC" -dumpversion |
awk -F. '{ if ((@S|@1 * 10000 + @S|@2 * 100 + @S|@3) >= 30400) { print "yes" } }'
`"
AC_MSG_RESULT(${newGCC:-no - assuming bugginess in -finline-functions})
test "$newGCC" = yes || INLINE_FUNCTIONS=-fno-inline-functions
fi
dnl Flags not supported by all *cc* variants
AC_TRY_CFLAGS("-Wall", wall="-Wall", wall="")
CFLAGS="$wall ${CFLAGS}"
DEBUG_CFLAGS="$wall ${DEBUG_CFLAGS}"
case "$host_or_hostalias" in
i?86-* | k?-* | athlon-* | pentium*)
if test "$GCC" = yes -o "${CC##*/}x" = "iccx" ; then
if test "$GCC" = yes; then
dnl Check for gcc cpu optimization support
AC_TRY_CFLAGS("-mtune=i386",
sarchopt="-mtune",
AC_TRY_CFLAGS("-mcpu=i386",
sarchopt="-mcpu",
AC_TRY_CFLAGS("-march=i386",
sarchopt="-march",
[ AC_MSG_RESULT(** no cpu optimization supports **)
sarchopt=no
]
)
)
)
dnl special check for k7 cpu CC support
AC_TRY_CFLAGS("$sarchopt=athlon", k7cpu="athlon", k7cpu="i686")
dnl add x86 specific gcc CFLAGS
CFLAGS="-O3 -pipe -fomit-frame-pointer $f_af $f_al $f_aj $m_wm $m_psb -fexpensive-optimizations $f_si -ffast-math $INLINE_FUNCTIONS $CFLAGS"
DEBUG_CFLAGS="-O $DEBUG_CFLAGS"
if test x"$sarchopt" != "xno"; then
archopt_val=
case "$host_or_hostalias" in
i386-*)
archopt_val="i386" ;;
i486-*)
archopt_val="i486" ;;
i586-*)
archopt_val="pentium"
;;
pentium-mmx-*)
archopt_val="pentium-mmx"
;;
pentiumpro-* | pentium2-* | i686-*)
archopt_val="pentiumpro"
if test x"$check_athlon" = "xyes"; then
if test -f /proc/cpuinfo; then
modelname=`cat /proc/cpuinfo | grep "model\ name\ :" | sed -e 's/ //g' | cut -d':' -f2`
case "$modelname" in
*Athlon* | *Duron* | *K7*)
archopt_val="$k7cpu"
;;
VIAEzra)
archopt_val="c3"
;;
esac
fi
fi
;;
k6-2-* | k6-3-*)
archopt_val="k6-2"
;;
k6-*)
archopt_val="k6"
;;
pentium3-*)
archopt_val="pentium3"
;;
pentium4-*)
archopt_val="pentium4"
;;
athlon-4-* | athlon-xp-* | athlon-mp-*)
archopt_val="athlon-4"
;;
k7-* | athlon-tbird-* | athlon-*)
archopt_val="athlon"
;;
esac
if test x"$archopt_val" != x; then
CFLAGS="$sarchopt=$archopt_val $CFLAGS"
DEBUG_CFLAGS="$sarchopt=$archopt_val $DEBUG_CFLAGS"
fi
fi
else
dnl we have the Intel compiler
CFLAGS="-unroll -ipo -ipo_obj -O3 $CFLAGS"
PASS1_CFLAGS="-prof_genx -prof_dir \$(PWD)/\$(top_builddir)/ $PASS1_CFLAGS"
PASS2_CFLAGS="-prof_use -prof_dir \$(PWD)/\$(top_builddir)/ $PASS2_CFLAGS"
AC_SUBST(PASS1_CFLAGS)
AC_SUBST(PASS2_CFLAGS)
fi
else
dnl add x86 specific cc CFLAGS
CFLAGS="-O $CFLAGS"
DEBUG_CFLAGS="-O $DEBUG_CFLAGS"
AC_DEFINE_UNQUOTED(FPM_64BIT,,[Define to select libmad fixed point arithmetic implementation])
fi
;;
alphaev56-*)
CFLAGS="-O3 -mcpu=ev56 -mieee $CFLAGS"
DEBUG_CFLAGS="-O3 -mcpu=ev56 -mieee $DEBUG_CFLAGS"
;;
alpha*)
CFLAGS="-O3 -mieee $CFLAGS"
DEBUG_CFLAGS="-O3 -mieee $DEBUG_CFLAGS"
;;
*darwin*)
CFLAGS="-O3 -pipe -fomit-frame-pointer $m_wm $m_psb -fexpensive-optimizations $f_si -ffast-math $INLINE_FUNCTIONS -no-cpp-precomp -D_INTL_REDIRECT_MACROS $CFLAGS"
DEBUG_CFLAGS="-O3 $DEBUG_CFLAGS"
;;
ppc-*-linux* | powerpc-*)
CFLAGS="-O3 -pipe -fomit-frame-pointer $m_wm $m_psb -fexpensive-optimizations $f_si -ffast-math $INLINE_FUNCTIONS $CFLAGS"
DEBUG_CFLAGS="-O3 $DEBUG_CFLAGS"
;;
sparc*-*-linux*)
CFLAGS="-O3 $cpu_cflags $INLINE_FUNCTIONS $CFLAGS"
DEBUG_CFLAGS="-O $cpu_cflags $INLINE_FUNCTIONS $DEBUG_CFLAGS"
case `uname -m` in
sparc)
cpu_cflags="-mcpu=supersparc -mtune=supersparc" ;;
sparc64)
cpu_cflags="-mcpu=ultrasparc -mtune=ultrasparc" ;;
esac
;;
sparc-*-solaris*)
if test "$GCC" = yes; then
case `uname -m` in
sun4c) cpu_cflags="-mcpu=v7 -mtune=supersparc" ;;
sun4m) cpu_cflags="-mcpu=v8 -mtune=supersparc" ;;
sun4u)
case `$CC --version 2>/dev/null` in
1.*|2.*)
# -mcpu=ultrasparc triggers a GCC 2.95.x compiler bug when
# compiling video_out.c:
# gcc: Internal compiler error: program cc1 got fatal signal 11
# avoid -mcpu=ultrasparc with gcc 2.*
cpu_cflags="-mcpu=v8 -mtune=ultrasparc"
;;
*)
# GCC 3 or newer should have no problem with -mcpu=ultrasparc
cpu_cflags="-mcpu=ultrasparc -mtune=ultrasparc"
;;
esac
;;
esac
cc_optimize_cflags="-O3 $cpu_cflags $INLINE_FUNCTIONS"
cc_debug_cflags="-O $cpu_cflags $INLINE_FUNCTIONS"
else
case `uname -m` in
sun4c) cpu_cflags="-xarch=v7" ;;
sun4m) cpu_cflags="-xarch=v8" ;;
sun4u) cpu_cflags="-xarch=v8plusa" ;;
esac
cc_optimize_cflags="-fast $cpu_cflags -xCC"
cc_debug_cflags="-O"
fi
CFLAGS="$cc_optimize_cflags $CFLAGS"
DEBUG_CFLAGS="$cc_debug_cflags $DEBUG_CFLAGS"
;;
x86_64-*)
CFLAGS="-O3 -fomit-frame-pointer $m_wm $m_psb -fexpensive-optimizations $f_si -ffast-math $INLINE_FUNCTIONS $CFLAGS"
DEBUG_CFLAGS="-g $DEBUG_CFLAGS"
;;
armv4l-*-linux*)
CFLAGS="-O2 -fsigned-char -ffast-math -mcpu=strongarm1100 -fomit-frame-pointer -fthread-jumps -fregmove $CFLAGS"
dnl CFLAGS="-O1 -fforce-mem -fforce-addr -fthread-jumps -fcse-follow-jumps -fcse-skip-blocks -fexpensive-optimizations -fregmove -fschedule-insns2 $INLINE_FUNCTIONS -fsigned-char -fomit-frame-pointer -march=armv4 -mtune=strongarm $CFLAGS"
DEBUG_CFLAGS="-O2 $DEBUG_CFLAGS"
;;
esac
fi
])
dnl Kate modeline: leave at the end
dnl kate: indent-width 2; replace-trailing-space-save 1; space-indent 1; backspace-indents 1;
|
