mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-12-03 17:42:40 +00:00
9028cda24b
It seems -ffast-math is not necessarily faster, and the errors it causes may not be worth the gains, but I'm not sure I want to nuke it completely, so instead disabling the worst offender of it (-fno-unsafe-math-optimizations) seems to be the best option. qfbsp now produces identical text output between optimized and unoptimized builds, and may be slightly faster than before the change (1.9s for start.map vs 2.0s)
273 lines
6.5 KiB
Text
273 lines
6.5 KiB
Text
if test -d $srcdir/.git; then
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cvs_def_enabled="!= xno"
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cvs_def_disabled="= xyes"
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else
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cvs_def_enabled="= xyes"
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cvs_def_disabled="!= xno"
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fi
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AC_MSG_CHECKING(for CFLAGS pre-set)
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leave_cflags_alone=no
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if test "x$CFLAGS" != "x"; then
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leave_cflags_alone=yes
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BUILD_TYPE="$BUILD_TYPE Custom"
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fi
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AC_MSG_RESULT([$leave_cflags_alone])
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if test "x$GCC" = xyes; then
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set $CC
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shift
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args="$*"
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AC_MSG_CHECKING(for gcc version)
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CCVER="gcc `$CC --version | grep '[[0-9]]\.[[0-9]]' | sed -e 's/.*(GCC)//' -e 's/[[^0-9]]*\([[0-9.]]*\).*/\1/'`"
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set $CCVER
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save_IFS="$IFS"
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IFS="."
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set $2
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CC_MAJ=$1
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CC_MIN=$2
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CC_SUB=$3
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IFS="$save_IFS"
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AC_MSG_RESULT($CCVER)
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fi
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AC_ARG_ENABLE(debug,
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[ --disable-debug compile without debugging],
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debug=$enable_debug
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)
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AC_MSG_CHECKING(for debugging)
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if test "x$debug" != xno -a "x$leave_cflags_alone" != xyes; then
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AC_MSG_RESULT(yes)
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BUILD_TYPE="$BUILD_TYPE Debug"
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DEBUG=-g
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if test "x$GCC" = xyes; then
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if test "$CC_MAJ" -ge 4; then
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DEBUG=-g3
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else
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if test "$CC_MAJ" -eq 3 -a "$CC_MIN" -ge 1; then
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DEBUG=-g3
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fi
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fi
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fi
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CFLAGS="$CFLAGS $DEBUG"
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else
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AC_MSG_RESULT(no)
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fi
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AC_ARG_ENABLE(optimize,
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[ --disable-optimize compile without optimizations (for development)],
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optimize=$enable_optimize,
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optimize=yes
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)
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AC_MSG_CHECKING(for optimization)
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if test "x$optimize" = xyes -a "x$leave_cflags_alone" != "xyes"; then
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AC_MSG_RESULT(yes)
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BUILD_TYPE="$BUILD_TYPE Optimize"
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if test "x$GCC" = xyes; then
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saved_cflags="$CFLAGS"
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CFLAGS=""
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QF_CC_OPTION(-frename-registers)
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if test "$CC_MAJ" -ge 4; then
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QF_CC_OPTION(-finline-limit=32000 -Winline)
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fi
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heavy="-O2 $CFLAGS -ffast-math -fno-unsafe-math-optimizations -funroll-loops -fomit-frame-pointer -fexpensive-optimizations"
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CFLAGS="$saved_cflags"
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light="-O2"
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AC_ARG_ENABLE(strict-aliasing,
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[ --enable-strict-aliasing enable the -fstrict-aliasing option of gcc])
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if test "x$enable_strict_aliasing" = "xyes"; then
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heavy="$heavy -fstrict-aliasing"
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light="$light -fstrict-aliasing"
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else
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if test "x$enable_strict_aliasing" != "xno"; then
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if test $CC_MAJ -ge 3; then
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heavy="$heavy -fstrict-aliasing"
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else
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if test $CC_MAJ = 2 -a $CC_MIN = 96; then
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light="$light -fno-strict-aliasing"
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fi
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fi
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else
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if test $CC_MAJ = 2 -a $CC_MIN = 96; then
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light="$light -fno-strict-aliasing"
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fi
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fi
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fi
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AC_MSG_CHECKING(for special compiler settings)
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AC_ARG_WITH(arch,
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[ --with-arch=ARCH control compiler architecture directly],
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arch="$withval", arch=auto
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)
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case "$arch" in
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auto)
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case "${host_cpu}" in
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i?86)
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MORE_CFLAGS="-march=${host_cpu}"
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;;
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*)
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MORE_CFLAGS=""
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;;
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esac
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;;
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no|"")
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MORE_CFLAGS=""
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;;
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*)
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MORE_CFLAGS="-march=$arch"
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;;
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esac
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if test "x$MORE_CFLAGS" = x; then
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AC_MSG_RESULT(no)
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else
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save_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS $MORE_CFLAGS"
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AC_TRY_COMPILE(
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[],
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[],
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AC_MSG_RESULT(yes),
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CFLAGS="$save_CFLAGS"
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AC_MSG_RESULT(no)
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)
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fi
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if test $CC_MAJ = 2 -a $CC_MIN = 96; then
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AC_MSG_CHECKING(if align options work)
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save_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -malign-loops=2 -malign-jumps=2 -malign-functions=2"
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AC_TRY_COMPILE(
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[],
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[],
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light="$light -malign-loops=2 -malign-jumps=2 -malign-functions=2"
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AC_MSG_RESULT(yes),
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AC_MSG_RESULT(no)
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)
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CFLAGS="$save_CFLAGS"
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CFLAGS="$CFLAGS $light"
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else
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CFLAGS="$CFLAGS $heavy"
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fi
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else
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CFLAGS=-O2
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fi
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else
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AC_MSG_RESULT(no)
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fi
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dnl CFLAGS for release and devel versions
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AC_ARG_ENABLE(profile,
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[ --enable-profile compile with profiling (for development)],
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profile=$enable_profile
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)
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if test "x$profile" = xyes; then
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BUILD_TYPE="$BUILD_TYPE Profile"
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if test "x$GCC" = xyes; then
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CFLAGS="`echo $CFLAGS | sed -e 's/-fomit-frame-pointer//g'` -pg"
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LDFLAGS="$LDFLAGS -pg"
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else
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CFLAGS="$CFLAGS -p"
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fi
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fi
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check_pipe=no
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if test "x$GCC" = xyes; then
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dnl Check for -pipe vs -save-temps.
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AC_MSG_CHECKING(for -pipe vs -save-temps)
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AC_ARG_ENABLE(save-temps,
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[ --enable-save-temps save temporary files],
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AC_MSG_RESULT(-save-temps)
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CFLAGS="$CFLAGS -save-temps"
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BUILD_TYPE="$BUILD_TYPE Save-temps"
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,
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AC_MSG_RESULT(-pipe)
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check_pipe=yes
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)
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fi
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if test "x$check_pipe" = xyes; then
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QF_CC_OPTION(-pipe)
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fi
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QF_CC_OPTION(-Wsign-compare)
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if test $CC_MAJ -gt 4 -o $CC_MAJ -eq 4 -a $CC_MIN -ge 5; then
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QF_CC_OPTION(-Wlogical-op)
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fi
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QF_CC_OPTION(-Wtype-limits)
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QF_CC_OPTION_TEST([-fvisibility=hidden], [VISIBILITY=-fvisibility=hidden])
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dnl QuakeForge uses lots of BCPL-style (//) comments, which can cause problems
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dnl with many compilers that do not support the latest ISO standards. Well,
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dnl that is our cover story -- the reality is that we like them and do not want
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dnl to give them up. :)
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dnl Make the compiler swallow its pride...
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if test "x$GCC" != xyes; then
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AC_MSG_CHECKING(for how to deal with BCPL-style comments)
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case "${host}" in
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*-aix*)
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CFLAGS="$CFLAGS -qcpluscmt"
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AC_MSG_RESULT([-qcpluscmt])
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;;
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*-irix6*)
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CFLAGS="$CFLAGS -Xcpluscomm"
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AC_MSG_RESULT([-Xcpluscomm])
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;;
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*-solaris*)
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CFLAGS="$CFLAGS -xCC"
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AC_MSG_RESULT([-xCC])
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;;
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*)
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AC_MSG_RESULT(nothing needed or no switch known)
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;;
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esac
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fi
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AC_ARG_ENABLE(Werror,
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[ --disable-Werror Do not treat warnings as errors]
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)
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dnl We want warnings, lots of warnings...
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dnl The help text should be INVERTED before release!
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dnl when in git, this test defaults to ENABLED.
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dnl In a release, this test defaults to DISABLED.
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if test "x$GCC" = "xyes"; then
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if test "x$enable_Werror" $cvs_def_enabled; then
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CFLAGS="$CFLAGS -Wall -Werror -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations"
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else
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CFLAGS="$CFLAGS -Wall"
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fi
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CFLAGS="$CFLAGS -fno-common"
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fi
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AS="$CC"
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if test "x$SYSTYPE" = "xWIN32"; then
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ASFLAGS="\$(DEFS) \$(CFLAGS) \$(CPPFLAGS) \$(DEFAULT_INCLUDES) \$(INCLUDES) -D_WIN32"
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plugin_ldflags="-no-undefined"
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plugin_libadd="-luser32 -lgdi32 -lwinmm"
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case "$host_os" in
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mingw*)
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if test "x$host" != "x$build"; then
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case "$build_os" in
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cygwin*)
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plugin_libadd=" -L/usr/lib/w32api $plugin_libadd"
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;;
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esac
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fi
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;;
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esac
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else
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ASFLAGS="\$(DEFS) \$(CFLAGS) \$(CPPFLAGS) \$(DEFAULT_INCLUDES) \$(INCLUDES)"
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plugin_ldflags=
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plugin_libadd=
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fi
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ASFLAGS="$ASFLAGS -DQFASM"
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CCASFLAGS="$ASFLAGS"
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CCAS="$AS"
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AC_SUBST(AS)
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AC_SUBST(ASFLAGS)
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AC_SUBST(CCAS)
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AC_SUBST(CCASFLAGS)
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QF_SUBST(plugin_ldflags)
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QF_SUBST(plugin_libadd)
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dnl Finalization of CFLAGS, LDFLAGS, and LIBS
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AC_SUBST(CFLAGS)
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AC_SUBST(LDFLAGS)
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AC_SUBST(LIBS)
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