Support for cc -m32

[Tijl Coosemans]

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.
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