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Linux: Fear and Loathing in GCC 4.4.0...
git-svn-id: http://pcsx2.googlecode.com/svn/trunk@1222 96395faa-99c1-11dd-bbfe-3dabce05a288
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arcum42
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134f02babb
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9eda5dc951
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@ -98,6 +98,29 @@ default: \
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#else
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// GCC 4.4.0 is a bit nutty, as compilers go. it gets a define to itself.
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#define GCC_VERSION (__GNUC__ * 10000 \
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+ __GNUC_MINOR__ * 100 \
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+ __GNUC_PATCHLEVEL__)
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/* Test for GCC > 4.4.0; Should be adjusted when new versions come out */
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#if GCC_VERSION >= 40400
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#define THE_UNBEARABLE_LIGHTNESS_OF_BEING_GCC_4_4_0
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#define __nooptimization __attribute__((optimize("O0"))
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#endif
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/*
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This theoretically unoptimizes. Not having much luck so far.
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#ifdef THE_UNBEARABLE_LIGHTNESS_OF_BEING_GCC_4_4_0
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#pragma GCC optimize ("O0")
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#endif
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#ifdef THE_UNBEARABLE_LIGHTNESS_OF_BEING_GCC_4_4_0
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#pragma GCC reset_options
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#endif
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*/
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// fixme - is this needed for recent versions of GCC? Or can we just use the first two macros
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// instead for both definitions (implementations) and declarations (includes)? -- air
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#define PCSX2_ALIGNED(alig,x) x __attribute((aligned(alig)))
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@ -116,6 +139,10 @@ default: \
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#define __noinline __attribute__((noinline))
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#endif
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#ifndef THE_UNBEARABLE_LIGHTNESS_OF_BEING_GCC_4_4_0
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#define __nooptimization
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#endif
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typedef struct {
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int size;
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s8 *data;
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@ -117,28 +117,47 @@ fi
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WARNING_FLAGS+=" -Wno-format -Wno-unused-parameter -Wno-unused-value "
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NORMAL_FLAGS+=" -msse -msse2 ${WARNING_FLAGS} "
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if test "x$unsupportedspeedfreak" == "xyes"
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then
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dnl Don't even try to get support for this.
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NORMAL_FLAGS+=" -pipe -O3 -march=native -funroll-loops -ffast-math "
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else
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if test "x$optimization" == "xyes"
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then
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NORMAL_FLAGS+=" -pipe -O2 "
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else
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NORMAL_FLAGS+=" -O0 "
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fi
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fi
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if test "x$unsupportedspeedfreak" == "xno"
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then
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dnl These optimizations seem to cause issues with GCC 4.3.3, so we'll turn them off.
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dnl I really need to run some tests and see if they are still needed.
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if test "$gccvernum" -ge "433"; then
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NORMAL_FLAGS+=" -fno-guess-branch-probability -fno-dse -fno-tree-dse "
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fi
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fi
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if test "$gccvernum" -ge "433"; then
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NORMAL_FLAGS+=" -fno-guess-branch-probability -fno-dse -fno-tree-dse "
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fi
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dnl Anything higher then -O0 seem to cause issues with GCC 4.4.0.
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if test "x$optimization" == "xyes"
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then
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dnl Oddly, turning on all the optimizations up to -O2 one by one doesn't cause issues in GCC 4.4.0.
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if test "$gccvernum" -ge "440"; then
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NORMAL_FLAGS+=" -O0 "
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dnl -O1, flag by flag, minus the 3 taken out on gcc 4.3.3
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NORMAL_FLAGS+=" -ftree-builtin-call-dce -ftree-ccp -ftree-ch -ftree-copyrename "
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NORMAL_FLAGS+=" -ftree-dce -ftree-dominator-opts "
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NORMAL_FLAGS+=" -ftree-fre "
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NORMAL_FLAGS+=" -ftree-sra "
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NORMAL_FLAGS+=" -ftree-ter "
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NORMAL_FLAGS+=" -fauto-inc-dec -fcprop-registers -fdce -fdefer-pop "
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NORMAL_FLAGS+=" -fif-conversion2 -fif-conversion "
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NORMAL_FLAGS+=" -finline-small-functions -fipa-pure-const -fipa-reference -fmerge-constants "
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NORMAL_FLAGS+=" -fsplit-wide-types -funit-at-a-time -fno-omit-frame-pointer"
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dnl And now for -O2. Comment out one that breaks compilation when turned on individually.
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NORMAL_FLAGS+=" -fthread-jumps -falign-functions -falign-jumps -falign-loops -falign-labels "
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NORMAL_FLAGS+=" -fcaller-saves -fcrossjumping -fcse-follow-jumps -fcse-skip-blocks "
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NORMAL_FLAGS+=" -fdelete-null-pointer-checks -fexpensive-optimizations -fgcse -fgcse-lm "
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NORMAL_FLAGS+=" -findirect-inlining -foptimize-sibling-calls -fpeephole2 -fregmove "
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NORMAL_FLAGS+=" -freorder-blocks -freorder-functions -frerun-cse-after-loop "
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NORMAL_FLAGS+=" -fsched-interblock "
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NORMAL_FLAGS+=" -fsched-spec "
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dnl NORMAL_FLAGS+=" -fschedule-insns "
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NORMAL_FLAGS+=" -fschedule-insns2 "
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NORMAL_FLAGS+=" -fstrict-aliasing -fstrict-overflow "
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NORMAL_FLAGS+=" -ftree-switch-conversion -ftree-pre -ftree-vrp "
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else
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NORMAL_FLAGS+=" -pipe -O2 "
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fi
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else
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NORMAL_FLAGS+=" -O0 "
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fi
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CFLAGS+=" ${NORMAL_FLAGS} -Xlinker -zmuldefs -m32 "
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CXXFLAGS+=" ${NORMAL_FLAGS} -fpermissive -Xlinker -zmuldefs -m32 "
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CCASFLAGS+=" ${NORMAL_FLAGS} -m32 "
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@ -187,3 +206,15 @@ echo " Custom cflags? $customcflags"
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echo " Compiler warnings? $warnings"
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echo " Compiler optimizations? $optimization"
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if test "$gccvernum" -ge "440"; then
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echo
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echo "*Congratulations*! You are running GCC 4.4.0! Thanks to this wonderful fact, you get"
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echo "millions of command line switches, probably seriously slowing down your compilation time."
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echo
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echo "GCC 4.4.0 causes pcsx2 to crash at *any* optimization above 0, yet mysteriously"
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echo "works properly if you add in the flags for all the optimizations yourself, which I have done."
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echo "Enjoy!"
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echo
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fi
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