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From: Rob Browning <rlb@defaultvalue.org>
Cc: bug-guile@gnu.org
Subject: Re: building gen-scmconfig.c on FreeBSD
Date: Tue, 14 Sep 2004 14:18:49 -0500	[thread overview]
Message-ID: <87llfcek12.fsf@trouble.defaultvalue.org> (raw)
In-Reply-To: <87sm9s5re7.fsf@zip.com.au> (Kevin Ryde's message of "Thu, 09 Sep 2004 08:26:24 +1000")

Kevin Ryde <user42@zip.com.au> writes:

> Andreas Vögele <voegelas@gmx.net> writes:
>>
>> gen-scmconfig.$(OBJEXT): gen-scmconfig.c
>> 	$(CC_FOR_BUILD) $(DEFS) $(INCLUDES) -c -o $@ $<;
>
> Yep, I'd been meaning to do that.  But probably omitting $INCLUDES,
> since they're likely to be host-system things, not build-system.
> $DEFS probably only has -DHAVE_CONFIG_H, and may be unnecessary too.
>
> One thing for a proper cross-compile is to figure out
> $OBJEXT_FOR_BUILD, which may be different from the host system.  I'd
> planned to go straight to an executable rather than through an obj.

I can't recall offhand.  Is CC_FOR_BUILD for executables that will be
run on the host system?  If not, then we shouldn't be using it at all.
gen-scmconfig has to be run at build time by the host to generate the
header, so it needs to be built by the host's compiler.  Note that
gen-scmconfig.c doesn't (and must not) depend on any target specific
computations like sizeof(foo), etc.  It is solely used as a portable
way to generate scmconfig.h, taking into account the contents of
config.h.

-- 
Rob Browning
rlb @defaultvalue.org and @debian.org; previously @cs.utexas.edu
GPG starting 2002-11-03 = 14DD 432F AE39 534D B592  F9A0 25C8 D377 8C7E 73A4


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  reply	other threads:[~2004-09-14 19:18 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-09-08  6:22 building gen-scmconfig.c on FreeBSD Andreas Vögele
2004-09-08 22:26 ` Kevin Ryde
2004-09-14 19:18   ` Rob Browning [this message]
2004-09-15 22:19     ` Kevin Ryde
2004-09-16  5:28       ` Rob Browning

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