CFLAGS参数参考

Rickyaaron

pentium-m推荐参数（gcc-3.4)

CFLAGS="-march=pentium-m -pipe -fno-delayed-branch -fcaller-saves -freorder-blocks -freorder-functions -falign-jumps -finline-functions -frename-registers -fweb -fomit-frame-pointer -fno-trapping-math -falign-functions=64"

pentium-4推荐参数
CFLAGS="-march=pentium4 -pipe --fno-if-conversion2 -foptimize-sibling-calls -fcse-follow-jumps -fgcse -frerun-cse-after-loop -fschedule-insns -fstrict-aliasing -freorder-functions -frename-registers -mno-align-stringops -minline-all-stringops"

pentium-3推荐参数
CFLAGS="-march=pentium3 -pipe -fforce-mem -fdelete-null-pointer-checks -fnew-ra -mieee-fp -maccumulate-outgoing-args -minline-all-stringops -fomit-frame-pointer"

Safe flags 参数推荐
i386 (Intel), do you really want to install gentoo on that ?

CHOST="i386-pc-linux-gnu"
CFLAGS="-march=i386 -O3 -pipe -fomit-frame-pointer"
CXXFLAGS="-march=i386 -O3 -pipe -fomit-frame-pointer"




i486 (Intel), do you really want to install gentoo on that ?

CHOST="i486-pc-linux-gnu"
CFLAGS="-march=i486 -O3 -pipe -fomit-frame-pointer"
CXXFLAGS="-march=i486 -O3 -pipe -fomit-frame-pointer"




Pentium 1 (Intel)

CHOST="i586-pc-linux-gnu"
CFLAGS="-march=pentium -O3 -pipe -fomit-frame-pointer"
CXXFLAGS="-march=pentium -O3 -pipe -fomit-frame-pointer"




Pentium MMX (Intel)

CHOST="i586-pc-linux-gnu"
CFLAGS="-march=pentium-mmx -O3 -pipe -fomit-frame-pointer"
CXXFLAGS="-march=pentium-mmx -O3 -pipe -fomit-frame-pointer"




Pentium PRO (Intel)

CHOST="i686-pc-linux-gnu"
CFLAGS="-march=pentiumpro -O3 -pipe -fomit-frame-pointer"
CXXFLAGS="-march=pentiumpro -O3 -pipe -fomit-frame-pointer"




Pentium II (Intel)

CHOST="i686-pc-linux-gnu"
CFLAGS="-march=pentium2 -O3 -pipe -fomit-frame-pointer"
CXXFLAGS="-march=pentium2 -O3 -pipe -fomit-frame-pointer"




Celeron (Mendocino), aka Celeron1 (Intel)

CHOST="i686-pc-linux-gnu"
CFLAGS="-march=pentium2 -O3 -pipe -fomit-frame-pointer"
CXXFLAGS="-march=pentium2 -O3 -pipe -fomit-frame-pointer"




Pentium III (Intel)

CHOST="i686-pc-linux-gnu"
CFLAGS="-march=pentium3 -O3 -pipe -fomit-frame-pointer"
CXXFLAGS="-march=pentium3 -O3 -pipe -fomit-frame-pointer"




Celeron (Coppermine) aka Celeron2 (Intel)

CHOST="i686-pc-linux-gnu"
CFLAGS="-march=pentium3 -O3 -pipe -fomit-frame-pointer"
CXXFLAGS="-march=pentium3 -O3 -pipe -fomit-frame-pointer"




Celeron (Willamette?) (Intel)

CHOST="i686-pc-linux-gnu"
CFLAGS="-march=pentium4 -O3 -pipe -fomit-frame-pointer"
CXXFLAGS="-march=pentium4 -O3 -pipe -fomit-frame-pointer"




Pentium 4 (Intel)

CHOST="i686-pc-linux-gnu"
CFLAGS="-march=pentium4 -O3 -pipe -fomit-frame-pointer"
CXXFLAGS="-march=pentium4 -O3 -pipe -fomit-frame-pointer"






Eden C3/Ezra (Via)

CHOST="i586-pc-linux-gnu"
CFLAGS="-march=i586 -m3dnow -O3 -pipe -fomit-frame-pointer"
CXXFLAGS="-march=i586 -m3dnow -O3 -pipe -fomit-frame-pointer"

quote : the ezra doesn't have any special instructions that you could optimize for, just consider is a K6-3...basically a p2 with 3dnow




K6 (AMD)

CHOST="i586-pc-linux-gnu"
CFLAGS="-march=k6 -O3 -pipe -fomit-frame-pointer"
CXXFLAGS="-march=k6 -O3 -pipe -fomit-frame-pointer"




K6-2 (AMD)

CHOST="i586-pc-linux-gnu"
CFLAGS="-march=k6-2 -O3 -pipe -fomit-frame-pointer"
CXXFLAGS="-march=k6-2 -O3 -pipe -fomit-frame-pointer"




K6-3 (AMD)

CHOST="i586-pc-linux-gnu"
CFLAGS="-march=k6-3 -O3 -pipe -fomit-frame-pointer"
CXXFLAGS="-march=k6-3 -O3 -pipe -fomit-frame-pointer"




Athlon (AMD)

CHOST="i686-pc-linux-gnu"
CFLAGS="-march=athlon -O3 -pipe -fomit-frame-pointer"
CXXFLAGS="-march=athlon -O3 -pipe -fomit-frame-pointer"




Athlon-tbird, aka K7 (AMD)

CHOST="i686-pc-linux-gnu"
CFLAGS="-march=athlon-tbird -O3 -pipe -fomit-frame-pointer"
CXXFLAGS="-march=athlon-tbird -O3 -pipe -fomit-frame-pointer"




Athlon-tbird XP (AMD)

CHOST="i686-pc-linux-gnu"
CFLAGS="-march=athlon-xp -O3 -pipe -fomit-frame-pointer"
CXXFLAGS="-march=athlon-xp -O3 -pipe -fomit-frame-pointer"




Athlon 4(AMD)

CHOST="i686-pc-linux-gnu"
CFLAGS="-march=athlon-4 -O3 -pipe -fomit-frame-pointer"
CXXFLAGS="-march=athlon-4 -O3 -pipe -fomit-frame-pointer"




Athlon XP (AMD)

CHOST="i686-pc-linux-gnu"
CFLAGS="-march=athlon-xp -O3 -pipe -fomit-frame-pointer"
CXXFLAGS="-march=athlon-xp -O3 -pipe -fomit-frame-pointer"




Athlon MP (AMD)

CHOST="i686-pc-linux-gnu"
CFLAGS="-march=athlon-mp -O3 -pipe -fomit-frame-pointer"
CXXFLAGS="-march=athlon-mp -O3 -pipe -fomit-frame-pointer"




603 (PowerPC)

CHOST="powerpc-unknown-linux-gnu"
CFLAGS="-O3 -pipe
CXXFLAGS="-O3 -pipe




603e (PowerPC)

CHOST="powerpc-unknown-linux-gnu"
CFLAGS="-O3 -pipe
CXXFLAGS="-O3 -pipe




604 (PowerPC)

CHOST="powerpc-unknown-linux-gnu"
CFLAGS="-O3 -pipe
CXXFLAGS="-O3 -pipe




604e (PowerPC)

CHOST="powerpc-unknown-linux-gnu"
CFLAGS="-O3 -pipe
CXXFLAGS="-O3 -pipe




750 aka as G3 (PowerPC)

CHOST="powerpc-unknown-linux-gnu"
CFLAGS="-mcpu=750 -O3 -pipe -mpowerpc-gfxopt"
CXXFLAGS="-mcpu=750 -O3 -pipe -mpowerpc-gfxopt"

Note: do not use -march=


7400, aka G4 (PowerPC)

CHOST="powerpc-unknown-linux-gnu"
CFLAGS="-mcpu=7400 -O2 -pipe -maltivec
-mabi=altivec -mpowerpc-gfxopt"
CXXFLAGS="-mcpu=7400 -O2 -pipe -maltivec
-mabi=altivec -mpowerpc-gfxopt"
-maltivec -mabi=altivec -mpowerpc-gfxopt"

Note: do not use -march=
Note: -O3 is unstable on G4


7450, aka G4 second generation (PowerPC)

CHOST="powerpc-unknown-linux-gnu"
CFLAGS="-mcpu=7450 -O2 -pipe
-maltivec -mabi=altivec -mpowerpc-gfxopt"
CXXFLAGS="-mcpu=7450 -O2 -pipe
-maltivec -mabi=altivec -mpowerpc-gfxopt"

Note: do not use -march=
Note: -O3 is unstable on G4

PowerPC (If you don't know which one)

CHOST="powerpc-unknown-linux-gnu"
CFLAGS="-O3 -pipe -mpowerpc-gfxopt"
CXXFLAGS="-O3 -pipe -mpowerpc-gfxopt"


Sparc

CHOST="sparc-unknown-linux-gnu"
CFLAGS="-O3 -pipe -fomit-frame-pointer"
CXXFLAGS="-O3 -pipe -fomit-frame-pointer"


Sparc 64

CHOST="sparc-unknown-linux-gnu"
CFLAGS="-O3 -pipe -fomit-frame-pointer"
CXXFLAGS="-O3 -pipe -fomit-frame-pointer"

cuxnil

非常感谢

Rickyaaron

麻烦版主整理一下。谢谢了。