On Monday July 19th 2004 Paulo Neves wrote: > I'm trying to compile openssl-0.9.7d for athlon. > After "./config shared" I edit Makefile to replace -m486 for -march=athlon here: > > ... > cc1: bad value (athlon) for -march= switch > > How can I compile for athlon? > > gcc -v > gcc version 2.95.4 20011002 (Debian prerelease)
The 2.x versions of gcc do not support specific options for the athlon. You need either -march=pentium (for the 2.x version of gcc) or use a 3.x version of gcc, which does support -march=athlon. You might want to experiment with 'openssl speed' afterwards to compare different options. In my limited testing specifying '-march=pentium' results in *less* efficient code on most processors than the default (-march=i486). Using gcc version 3.x versus version 2.x seems to always result in a noticeably faster executable. So I'd say the compiler does make a difference, but the default options are quite alright. And using executables compiled for specific processors can sometimes result in strange bugs when run on other processors. -- Marco Roeland ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List [EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]
