From: Ulrich Drepper Date: Tue, 17 Aug 1999 20:24:04 +0000 (+0000) Subject: Regenerated. X-Git-Tag: cvs/glibc_2-1-2~129 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=6611bd6dda2ea226dfc73234d009875f87197243;p=thirdparty%2Fglibc.git Regenerated. --- diff --git a/INSTALL b/INSTALL index 8eb8cacde71..60c21d9551b 100644 --- a/INSTALL +++ b/INSTALL @@ -144,9 +144,10 @@ will be used, and CFLAGS sets optimization options for the compiler. is. This is most useful to change the CPU submodel. For example, if configure guesses your machine as `i586-pc-linux-gnu' but you want to compile a library optimized for 386es, give - `--host=i386-pc-linux-gnu' or just `--host=i386-linux'. (A - library compiled for a Pentium (`i586') will still work on a 386, - but it may be slower.) + `--host=i386-pc-linux-gnu' or just `--host=i386-linux' and add the + appropriate compiler flags (`-mcpu=i386' will do the trick) to + CFLAGS. (A library compiled for a Pentium (`i586') will still work + on a 386, but it may be slower.) If you give just `--build', configure will get confused. @@ -367,10 +368,13 @@ maintainers by sending electronic mail to . Each case of `iX86' can be `i386', `i486', `i586', or `i686'. All of those configurations produce a library that can run on any of these -processors. The library will be optimized for the specified processor, -but will not use instructions not available on all of them. If you -want the library to use instructions only available on newer -processors, give GCC the appropriate `-m' switches via CFLAGS. +processors if the compiler is configured correctly. The GCC compiler +by default generates code that's optimized for the machine it's +configured for and will use the instructions available on that machine. +For example if your GCC is configured for `i686', gcc will optimize +for `i686' and might issue some `i686' specific instructions. To +generate code for other models you should give GCC the appropriate +`-march=' and `-mcpu=' compiler switches via CFLAGS. Specific advice for Linux systems =================================