Date: Thu, 22 Feb 2001 12:50:50 +0100 (CET) From: Alexander Leidinger <Alexander@Leidinger.net> To: kris@obsecurity.org Cc: arch@FreeBSD.ORG Subject: Re: cvs commit: src/share/mk sys.mk Message-ID: <200102221150.f1MBopF07996@Magelan.Leidinger.net> In-Reply-To: <20010221123835.A59024@mollari.cthul.hu>
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On 21 Feb, Kris Kennaway wrote: > .if ${MACHINE_CPU:Mi686} > CFLAGS += -mpentiumpro > .elif ${MACHINE_CPU:Mi586} > CFLAGS += -mpentium > ... > .endif > > which may be worthwhile to do. > > The -march statement doesnt matter though, since some binaries built > with MACHINE_CPU set will already be CPU-specific (e.g. if you specify > i686 then openssl will use the i686 blowfish code) You want to use "-mXXX -march=XXX". You are CPU-specific already, no need to produce parts of code which run on an i386 too. ---snip--- #include <stdio.h> int main(void) { #if defined(__pentiumpro__) || defined(__i686__) puts("pentiumpro"); #endif #if defined(__pentium__) || defined(__i586__) puts("pentium"); #endif exit(0); } ---snip--- ---snip--- (23) netchild@ttyp0 % rm cputest; CFLAGS=-mpentiumpro gmake cputest; md5 cputest; ./cputest cc -mpentiumpro cputest.c -o cputest MD5 (cputest) = 577769bb73460f7bd062882a4ee44235 pentiumpro (24) netchild@ttyp0 % rm cputest; CFLAGS=-march=pentiumpro gmake cputest; md5 cputest; ./cputest cc -march=pentiumpro cputest.c -o cputest MD5 (cputest) = b721209c7b0089ee1442cb0880af06b8 (25) netchild@ttyp0 % rm cputest; CFLAGS="-mpentiumpro -march=pentiumpro" gmake cputest; md5 cputest; ./cputest cc -mpentiumpro -march=pentiumpro cputest.c -o cputest MD5 (cputest) = c41ce5e5941b335c6fcf1b6d8d59f2e1 pentiumpro ---snip--- Bye, Alexander. -- "One world, one web, one program" -- Microsoft promotional ad "Ein Volk, ein Reich, ein Fuehrer" -- Adolf Hitler http://www.Leidinger.net Alexander @ Leidinger.net GPG fingerprint = C518 BC70 E67F 143F BE91 3365 79E2 9C60 B006 3FE7 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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