Re: Universal libpq.a ?

"Dave Page" <dpage@postgresql.org> writes:
> On Feb 4, 2008 6:25 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> "Dave Page" <dpage@postgresql.org> writes:
>>> The Mac build of EDB Postgres is universal throughout,
>>
>> Yeah?  How painful is it?  We've had more than one request to enable
>> universal builds.

> There was fair bit of pain getting it to work, but the resulting
> script isn't overly complex. Note this is based on work by the guys at
> entropy.ch. Ignore the target directory fudging...

Hmm.  The multiple versions of pg_config.h don't bother me --- the RPM
distributions have to do something very similar to support multilib
Linux platforms.  This bit seems pretty brute-force though:

>     # Fixup the makefiles
>     echo "Post-processing Makefiles for Universal Binary build"
>     find . -name Makefile -print -exec perl -p -i.backup -e 's/\Q$(LD)
> $(LDREL) $(LDOUT)\E (\S+) (.+)/\$(LD) -arch ppc \$(LDREL) \$(LDOUT)
> $1.ppc $2; \$(LD) -arch i386 \$(LDREL) \$(LDOUT) $1.i386 $2; lipo
> -create -output $1 $1.ppc $1.i386/' {} \; || _die "Failed to
> post-process the Postgres Makefiles for Universal build"

I thought I'd read that you could solve this problem by using the gcc
frontend to invoke loading, ie something involving making $(LD) call gcc
with some options.  I'd be willing to tweak the LDxxx macros a bit if
needed to enable a solution like that, but changing the Makefiles at
build time is clearly right out ...

            regards, tom lane