Date: Fri, 30 Jul 2010 14:11:15 +0200 From: Nathan Whitehorn <nwhitehorn@freebsd.org> To: Tijl Coosemans <tijl@coosemans.org> Cc: pluknet <pluknet@gmail.com>, freebsd-arch@freebsd.org Subject: Re: Support for cc -m32 Message-ID: <4C52C163.9010601@freebsd.org> In-Reply-To: <201007301053.27407.tijl@coosemans.org> References: <201007291718.12687.tijl@coosemans.org> <4C520044.5020002@freebsd.org> <201007301053.27407.tijl@coosemans.org>
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On 07/30/10 10:53, Tijl Coosemans wrote: > On Friday 30 July 2010 00:27:16 Nathan Whitehorn wrote: > >> On 07/29/10 17:18, Tijl Coosemans wrote: >> >>> I've put the initial version of some patches online to support cross >>> compilation of 32 bit binaries on amd64. It's modelled after how NetBSD >>> does this. >>> >>> With these patches something like "cc -m32 -o test test.c -pthread -lm" >>> generates a program that runs on FreeBSD/i386. >>> >>> http://people.freebsd.org/~tijl/cc-m32-1.diff >>> http://people.freebsd.org/~tijl/cc-m32-2.diff >>> http://people.freebsd.org/~tijl/cc-m32-3.diff >>> >>> *cc-m32-1.diff* : Let ld and cc find 32 bit libraries. >>> >> Why not use the GCC multilib code for what patch 1 does? There is >> already code in cc_tools/Makefile to handle this for powerpc64 (where >> cc -m32 already works). >> > Thanks, it's indeed better to specify this per architecture so I've > updated the patch. It changes the output of -print-search-dirs though. > > With the previous patch "cc -m32 -print-search-dirs" printed: > > install: /usr/libexec/ > programs: =/usr/bin/:/usr/bin/:/usr/libexec/:/usr/libexec/:/usr/libexec/ > libraries: =/usr/lib32/:/usr/lib32/ > > And now it prints: > > install: /usr/libexec/ > programs: =/usr/bin/:/usr/bin/:/usr/libexec/:/usr/libexec/:/usr/libexec/ > libraries: =/usr/lib/32/:/usr/lib/../lib32/:/usr/lib/:/usr/lib/ > > That works, but it's not entirely correct. > That's just an artifact of the way multilib works, I'm afraid. Is there a reason it could be harmful? -Nathan
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