GCC compilation optimization settings

GCC compilation optimization settings-general Linux technology-Linux programming and kernel information. The following is a detailed description. Check your gcc version:

# Gcc -- version

* Obtain the cpu model:

# Cat/proc/cpuinfo

* Create the make. conf file under/etc/and write different content according to the cpu model (note that your gcc version must be above 3.0 ):

I386 (Intel)

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

Isung (Intel)

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

Celon (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"

Celon (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"

Celon (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 ()

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

K6 (AMD)

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

AMD (K6-2)

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

AMD (K6-3)

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

603e (PowerPC)

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

604 (PowerPC)

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

604e (PowerPC)

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

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"

ISCSI

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

64

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

Well, the program running efficiency compiled by you will be much higher than before! As long as you have time, you can put your system such as Red Hat Linux 9 source code (suffix. src. rpm) re-compile all the files once, and you will find that your Red Hat Linux system is much faster than the original one!