Date: Fri, 12 Mar 2004 12:55:10 -0700 (MST) From: RJ45 <rj45@slacknet.com> To: freebsd-alpha@freebsd.org Subject: ccc optimizations ? Message-ID: <Pine.LNX.4.21.0403121247430.3880-100000@slacknet.slacknet.com>
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Hello, what are the best comand line options to gain a fastest as possible executable using ccc ? I have a XP1000 with 4.9 release ( with 5.x I had lots a problems with ccc). I tryed these options: ccc -fast -O3 -arch ev67 -ifo and I gaing slightly better results than using ccc with no options actually after many tries it looks like "-fast" is the one option which counts something, all the others (-O3 -arch or -tune) looks like useless when used with -fast if I don't use -fast also I have to compile the ieee_fp_control.c and errno_location.c together with my code otherwise ther eare unresolved externals. anyone has some feedback about how to gain the best performances out of ccc ? Anyway I want to mention that with a progam doing lots of integer calculations and iterations with arctan function on my XP1000 using ccc I get better results that on a Pentium IV 3GHz using gcc with i686 optimization switches. ev6 is a great CPU. Rick
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