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<p><FONT class=normalfont><B><font color=blue>不同的CPU下最佳编译参数</font></B></FONT><BR><FONT class=smallfont color=#ff9900>2004-04-23 15:18 pm</FONT><BR><FONT class=normalfont>作者：作者<br>来自：Linux知识宝库<br>联系方式：无名<br><br>gcc在不同的体系机构/CPU下编译效果有不同，需要使用不同的编译参数达到最佳效果。<br>
<br>
一、1.2版(gcc 2.9.x版)<br>
<br>
-pipe -fomit-frame-pointer"<br>
CXXFLAGS="-march=i486 -O3 -pipe -fomit-frame-pointer"<br>
<br>
Pentium, Pentium MMX+, Celeron (Mendocino) (Intel)<br>
CHOST="i586-pc-linux-gnu"<br>
CFLAGS="-march=pentium -O3 -pipe -fomit-frame-pointer"<br>
CXXFLAGS="-march=pentium -O3 -pipe -fomit-frame-pointer"<br>
<br>
Pentium Pro/II/III/4, Celeron (Coppermine), Celeron (Willamette?) (Intel)<br>
CHOST="i686-pc-linux-gnu"<br>
CFLAGS="-march=i686 -O3 -pipe -fomit-frame-pointer"<br>
CXXFLAGS="-march=i686 -O3 -pipe -fomit-frame-pointer"<br>
<br>
Eden C3/Ezra (Via)<br>
CHOST="i586-pc-linux-gnu"<br>
CFLAGS="-march=i586 -O3 -pipe -fomit-frame-pointer"<br>
CXXFLAGS="-march=i586 -O3 -pipe -fomit-frame-pointer"<br>
<br>
Quote : I did the original gentoo install using 1.2, with gcc 2.95 using -march=i586. i686 won't work.<br>
<br>
K6 or beyond (AMD)<br>
CHOST="i586-pc-linux-gnu"<br>
CFLAGS="-march=k6 -O3 -pipe -fomit-frame-pointer"<br>
CXXFLAGS="-march=k6 -O3 -pipe -fomit-frame-pointer"<br>
<br>
(A Duron will report "Athlon" in its /proc/cpuinfo)<br>
<br>
Athlon (AMD)<br>
CHOST="i686-pc-linux-gnu"<br>
CFLAGS="-march=k6 -O3 -pipe -fomit-frame-pointer"<br>
CXXFLAGS="-march=k6 -O3 -pipe -fomit-frame-pointer"<br>
<br>
For the following, i don't know of any flag that enhance performances..., do you ?<br>
<br>
PowerPC<br>
CHOST="powerpc-unknown-linux-gnu"<br>
CFLAGS="-O3 -pipe -fomit-frame-pointer"<br>
CXXFLAGS="-O3 -pipe -fomit-frame-pointer"<br>
<br>
Sparc<br>
CHOST="sparc-unknown-linux-gnu"<br>
CFLAGS="-O3 -pipe -fomit-frame-pointer"<br>
CXXFLAGS="-O3 -pipe -fomit-frame-pointer"<br>
<br>
Sparc 64<br>
CHOST="sparc64-unknown-linux-gnu"<br>
CFLAGS="-O3 -pipe -fomit-frame-pointer"<br>
CXXFLAGS="-O3 -pipe -fomit-frame-pointer"<br>
<br>
<br>
二、1.4版(gcc 3.x版):<br>
<br>
<br>
i386 (Intel), do you really want to install gentoo on that ?<br>
CHOST="i386-pc-linux-gnu"<br>
CFLAGS="-march=i386 -O3 -pipe -fomit-frame-pointer"<br>
CXXFLAGS="-march=i386 -O3 -pipe -fomit-frame-pointer"<br>
<br>
i486 (Intel), do you really want to install gentoo on that ?<br>
CHOST="i486-pc-linux-gnu"<br>
CFLAGS="-march=i486 -O3 -pipe -fomit-frame-pointer"<br>
CXXFLAGS="-march=i486 -O3 -pipe -fomit-frame-pointer"<br>
<br>
Pentium 1 (Intel)<br>
CHOST="i586-pc-linux-gnu"<br>
CFLAGS="-march=pentium -O3 -pipe -fomit-frame-pointer"<br>
CXXFLAGS="-march=pentium -O3 -pipe -fomit-frame-pointer"<br>
<br>
Pentium MMX (Intel)<br>
CHOST="i586-pc-linux-gnu"<br>
CFLAGS="-march=pentium-mmx -O3 -pipe -fomit-frame-pointer"<br>
CXXFLAGS="-march=pentium-mmx -O3 -pipe -fomit-frame-pointer"<br>
<br>
Pentium PRO (Intel)<br>
CHOST="i686-pc-linux-gnu"<br>
CFLAGS="-march=pentiumpro -O3 -pipe -fomit-frame-pointer"<br>
CXXFLAGS="-march=pentiumpro -O3 -pipe -fomit-frame-pointer"<br>
<br>
Pentium II (Intel)<br>
CHOST="i686-pc-linux-gnu"<br>
CFLAGS="-march=pentium2 -O3 -pipe -fomit-frame-pointer"<br>
CXXFLAGS="-march=pentium2 -O3 -pipe -fomit-frame-pointer"<br>
<br>
Celeron (Mendocino), aka Celeron1 (Intel)<br>
CHOST="i686-pc-linux-gnu"<br>
CFLAGS="-march=pentium2 -O3 -pipe -fomit-frame-pointer"<br>
CXXFLAGS="-march=pentium2 -O3 -pipe -fomit-frame-pointer"<br>
<br>
Pentium III (Intel)<br>
CHOST="i686-pc-linux-gnu"<br>
CFLAGS="-march=pentium3 -O3 -pipe -fomit-frame-pointer"<br>
CXXFLAGS="-march=pentium3 -O3 -pipe -fomit-frame-pointer"<br>
<br>
Celeron (Coppermine) aka Celeron2 (Intel)<br>
CHOST="i686-pc-linux-gnu"<br>
CFLAGS="-march=pentium3 -O3 -pipe -fomit-frame-pointer"<br>
CXXFLAGS="-march=pentium3 -O3 -pipe -fomit-frame-pointer"<br>
<br>
Celeron (Willamette?) (Intel)<br>
CHOST="i686-pc-linux-gnu"<br>
CFLAGS="-march=pentium4 -O3 -pipe -fomit-frame-pointer"<br>
CXXFLAGS="-march=pentium4 -O3 -pipe -fomit-frame-pointer"<br>
<br>
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