Linux优化经验

ed-char" 

 

750 aka as G3 (PowerPC) 

 

CHOST="powerpc-unknown-linux-gnu" 

CFLAGS="-mcpu=750 -O3 -pipe -fsigned-char -mpowerpc-gfxopt" 

CXXFLAGS="-mcpu=750 -O3 -pipe -fsigned-char -mpowerpc-gfxopt" 

 

7400, aka G4 (PowerPC) 

 

CHOST="powerpc-unknown-linux-gnu" 

CFLAGS="-mcpu=7400 -O2 -pipe -fsigned-char -maltivec 

-mabi=altivec -mpowerpc-gfxopt" 

CXXFLAGS="-mcpu=7400 -O2 -pipe -fsigned-char -maltivec 

-mabi=altivec -mpowerpc-gfxopt" 

-fsigned-char -maltivec -mabi=altivec -mpowerpc-gfxopt" 

 

7450, aka G4 second generation (PowerPC) 

 

CHOST="powerpc-unknown-linux-gnu" 

CFLAGS="-mcpu=7450 -O2 -pipe -fsigned-char 

-maltivec -mabi=altivec -mpowerpc-gfxopt" 

CXXFLAGS="-mcpu=7450 -O2 -pipe -fsigned-char 

-maltivec -mabi=altivec -mpowerpc-gfxopt" 

 

 

PowerPC (If you don't know which one) 

 

CHOST="powerpc-unknown-linux-gnu" 

CFLAGS="-O3 -pipe -fsigned-char -mpowerpc-gfxopt" 

CXXFLAGS="-O3 -pipe -fsigned-char -mpowerpc-gfxopt" 

 

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" 

 

 

好了，这样做后你编译出的程序运行效率将比以前高很多！只要你有时间，你可以把你的系统如redhat linux 9.0的源代码（后缀.src.rpm）全部重新编译一次，你会发现你的Redhat Linux系统将比原来快一大截！