gcc最佳编译参数

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 -fomit-frame-pointer -fsigned-char"
CXXFLAGS="-O3 -pipe -fomit-frame-pointer -fsigned-char"

603e (PowerPC)
CHOST="powerpc-unknown-linux-gnu"
CFLAGS="-O3 -pipe -fomit-frame-pointer -fsigned-char"
CXXFLAGS="-O3 -pipe -fomit-frame-pointer -fsigned-char"

604 (PowerPC)
CHOST="powerpc-unknown-linux-gnu"
CFLAGS="-O3 -pipe -fomit-frame-pointer -fsigned-char"
CXXFLAGS="-O3 -pipe -fomit-frame-pointer -fsigned-char"

604e (PowerPC)
CHOST="powerpc-unknown-linux-gnu"
CFLAGS="-O3 -pipe -fomit-frame-pointer -fsigned-char"
CXXFLAGS="-O3 -pipe -fomit-frame-pointer -fsigned-char"

750 aka as G3 (PowerPC)
CHOST="powerpc-unknown-linux-gnu"
CFLAGS="-mcpu=750 -O3 -pipe -fomit-frame-pointer
-fsigned-char"
CXXFLAGS="-mcpu=750 -O3 -pipe -fomit-frame-pointer
-fsigned-char"

Note: do not use -march=

7400, aka G4 (PowerPC)
CHOST="powerpc-unknown-linux-gnu"
CFLAGS="-mcpu=7400 -O3 -pipe -fomit-frame-pointer
-fsigned-char -maltivec"
CXXFLAGS="-mcpu=7400 -O3 -pipe -fomit-frame-pointer
-fsigned-char -maltivec"

Note: do not use -march=

7450, aka G4 second generation (PowerPC)
CHOST="powerpc-unknown-linux-gnu"
CFLAGS="-mcpu=7450 -O3 -pipe -fomit-frame-pointer
-fsigned-char -maltivec"
CXXFLAGS="-mcpu=7450 -O3 -pipe -fomit-frame-pointer
-fsigned-char -maltivec"

Note: do not use -march=

PowerPC (If you don't know which one)
CHOST="powerpc-unknown-linux-gnu"
CFLAGS="-O3 -pipe -fomit-frame-pointer -fsigned-char"
CXXFLAGS="-O3 -pipe -fomit-frame-pointer -fsigned-char"

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

Sparc 64
CHOST="sparc64-unknown-linux-gnu"
CFLAGS="-O3 -pipe -fomit-frame-pointer"
CXXFLAGS="-O3 -pipe -fomit-frame-pointer"


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