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(svn r18360) -Add: configure 'support' for GCC's LTO and ICC's IPO

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rubidium 2009-12-01 20:53:13 +00:00
parent d614dc78ba
commit 976246aedc
1 changed files with 50 additions and 4 deletions
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54
config.lib
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@ -48,6 +48,7 @@ set_default() {
enable_debug="0"
enable_desync_debug="0"
enable_profiling="0"
enable_lto="0"
enable_dedicated="0"
enable_network="1"
enable_static="1"
@ -117,6 +118,7 @@ set_default() {
enable_debug
enable_desync_debug
enable_profiling
enable_lto
enable_dedicated
enable_network
enable_static
@ -264,6 +266,10 @@ detect_params() {
--enable-desync-debug=*) enable_desync_debug="$optarg";;
--enable-profiling) enable_profiling="1";;
--enable-profiling=*) enable_profiling="$optarg";;
--enable-lto) enable_lto="1";;
--enable-lto=*) enable_lto="$optarg";;
--enable-ipo) enable_lto="1";;
--enable-ipo=*) enable_lto="$optarg";;
--enable-dedicated) enable_dedicated="1";;
--enable-dedicated=*) enable_dedicated="$optarg";;
--enable-network=*) enable_network="$optarg";;
@ -596,6 +602,21 @@ check_params() {
sleep 5
fi
if [ "$enable_lto" != "0" ]; then
has_lto=`($cxx_build -dumpspecs 2>&1 | grep '\%{flto}') || ($cxx_build -help ipo 2>&1 | grep '\-ipo')`
if [ -n "$has_lto" ]; then
log 1 "using link time optimization... yes"
else
enable_lto="0"
log 1 "using link time optimization... no"
log 1 "WARNING: you selected link time optimization but it is not found."
sleep 5
fi
else
log 1 "using link time optimization... no"
fi
if [ "$os" != "OSX" ] && [ "$with_osx_sysroot" != "0" ]; then
if [ "$with_osx_sysroot" = "1" ]; then
with_osx_sysroot="0"
@ -1088,6 +1109,13 @@ make_compiler_cflags() {
# Use c++0x mode so static_assert() is available
cxxflags="$cxxflags -std=c++0x"
fi
has_ipo=`$1 -help ipo | grep '\-ipo'`
if [ "$enable_lto" != "0" ] && [ -n "$has_ipo" ]; then
# Use IPO (only if we see IPO exists and is requested)
flags="$flags -ipo"
ldflags="$ldflags -ipo $CFLAGS"
fi
else
# Enable some things only for certain GCC versions
cc_version=`$1 -dumpversion | cut -c 1,3`
@ -1113,6 +1141,7 @@ make_compiler_cflags() {
# break anything. So disable strict-aliasing to make the
# compiler all happy.
flags="$flags -fno-strict-aliasing"
ldflags="$ldflags -fno-strict-aliasing"
# Warn about casting-out 'const' with regular C-style cast.
# The preferred way is const_cast<>() which doesn't warn.
flags="$flags -Wcast-qual"
@ -1124,6 +1153,7 @@ make_compiler_cflags() {
# sure that they will not happen. It furthermore complains
# about it's own optimized code in some places.
flags="$flags -fno-strict-overflow"
ldflags="$ldflags -fno-strict-overflow"
fi
if [ $cc_version -ge 43 ]; then
@ -1132,6 +1162,16 @@ make_compiler_cflags() {
cxxflags="$cxxflags -std=gnu++0x"
fi
if [ $cc_version -ge 45 ]; then
# Only GCC 4.5+ has (possibly) LTO
has_lto=`$1 -dumpspecs | grep '\%{flto}'`
if [ "$enable_lto" != "0" ] && [ -n "$has_lto" ]; then
# Use LTO only if we see LTO exists and is requested
flags="$flags -flto"
ldflags="$ldflags -flto $CFLAGS"
fi
fi
has_rdynamic=`$1 -dumpspecs | grep rdynamic`
if [ -n "$has_rdynamic" ]; then
# rdynamic is used to get useful stack traces from crash reports.
@ -1153,7 +1193,7 @@ make_cflags_and_ldflags() {
# LDFLAGS for BUILD
LDFLAGS_BUILD=""
# General CFlags for HOST
CFLAGS="$CFLAGS -D$os"
CFLAGS="$CFLAGS"
# Special CXXFlags for HOST
CXXFLAGS="$CXXFLAGS"
# Libs to compile. In fact this is just LDFLAGS
@ -1161,6 +1201,11 @@ make_cflags_and_ldflags() {
# LDFLAGS used for HOST
LDFLAGS="$LDFLAGS"
make_compiler_cflags "$cc_build" "$CFLAGS_BUILD" "CFLAGS_BUILD" "$CXXFLAGS_BUILD" "CXXFLAGS_BUILD" "$LDFLAGS_BUILD" "LDFLAGS_BUILD"
make_compiler_cflags "$cc_host" "$CFLAGS" "CFLAGS" "$CXXFLAGS" "CXXFLAGS" "$LDFLAGS" "LDFLAGS"
CFLAGS="$CFLAGS -D$os"
if [ $enable_debug = 0 ]; then
# No debug, add default stuff
OBJS_SUBDIR="release"
@ -1174,6 +1219,7 @@ make_cflags_and_ldflags() {
fi
CFLAGS="-O2 -fomit-frame-pointer $CFLAGS"
LDFLAGS="-O2 -fomit-frame-pointer $LDFLAGS"
fi
else
OBJS_SUBDIR="debug"
@ -1187,6 +1233,7 @@ make_cflags_and_ldflags() {
fi
if [ $enable_debug -ge 2 ]; then
CFLAGS="$CFLAGS -fno-inline"
LDFLAGS="$LDFLAGS -fno-inline"
fi
if [ $enable_debug -ge 3 ]; then
CFLAGS="$CFLAGS -O0"
@ -1204,9 +1251,6 @@ make_cflags_and_ldflags() {
CFLAGS="$CFLAGS -DNO_THREADS"
fi
make_compiler_cflags "$cc_build" "$CFLAGS_BUILD" "CFLAGS_BUILD" "$CXXFLAGS_BUILD" "CXXFLAGS_BUILD" "$LDFLAGS_BUILD" "LDFLAGS_BUILD"
make_compiler_cflags "$cc_host" "$CFLAGS" "CFLAGS" "$CXXFLAGS" "CXXFLAGS" "$LDFLAGS" "LDFLAGS"
if [ "`echo $1 | cut -c 1-3`" != "icc" ]; then
if [ "$os" = "CYGWIN" ]; then
flags="$flags -mwin32"
@ -3037,6 +3081,8 @@ showhelp() {
echo " --enable-debug[=LVL] enable debug-mode (LVL=[0123], 0 is release)"
echo " --enable-desync-debug=[LVL] enable desync debug options (LVL=[012], 0 is none"
echo " --enable-profiling enables profiling"
echo " --enable-lto enables GCC's Link Time Optimization (LTO)/ICC's"
echo " Interprocedural Optimization if available"
echo " --enable-dedicated compile a dedicated server (without video)"
echo " --enable-static enable static compile (doesn't work for"
echo " all HOSTs)"