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Message-ID: <456FACD3.7080700@users.sourceforge.net>
Date: Thu, 30 Nov 2006 22:17:23 -0600
From: "Yaakov S (Cygwin Ports)" <yselkowitz AT users DOT sourceforge DOT net>
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To: cygwin AT cygwin DOT com, gnupg-devel AT gnupg DOT org
Subject: Re: GPGME 1.0.3 Build Problem
References: <20061130141425 DOT 2692 AT henman-np DOT b-eng DOT it DOT to-be DOT co DOT jp> 	<87wt5cx6t6.wl%marcus DOT brinkmann AT ruhr-uni-bochum DOT de> <87slg0wb6v.wl%marcus DOT brinkmann AT ruhr-uni-bochum DOT de>
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Marcus Brinkmann wrote:
> I gave it another look, and it seems to me that the problem could be
> the following: GPGME tries to build versions of GPGME linking against
> pthread and pth.  These versions are built from a version of the
> library without any thread support (libgpgme-real.la), which is not
> installed.  This non-installed library has undefined symbols, btw, but
> it seems that libtool does not hickup over those (possibly because
> it's not installed), or you didn't give us the warning message for
> that case.
> 
> Then, GPGME builds the final library from the thread module, adding
> the non-installed libgpgme-real.la to the bundle via LIBADD.
> 
> Ok, that's not really clean.  The problem is that now the order is
> messed up: The thread module's symbols get first on the linker command
> line, then comes the non-installed library using those symbols, then
> comes the rest.  However, this setup avoids building every file three
> times, cutting compile time to a third, and it seems to work OK on our
> main targets (and then some).

That's not a problem because libtool encloses the noinst libs with
- -Wl,--{,no-}whole-archive, allowing for just this situation.

> Well, considering that it is not totally clean, I don't have a
> fundamental object to remove the libgpgme-real hack and build each
> file three times, if you test and submit a patch to that effect.  I am
> also open to other suggestions.

That should not be necessary.  The following patch fixes the build of
gpgme-1.1.2 on cygwin:

http://cygwin-ports.cvs.sourceforge.net/*checkout*/cygwin-ports/ports/libs/gpgme/gpgme-1.1.2-1.src.patch

A similar patch may be necessary for libgpgme_pth_la_LDFLAGS; pth isn't
part of the distro however, so I haven't tried it.

(If the above is true, you can just remove the $(no_undefined)
conditional and use '-no-undefined' throughout.)


Yaakov
Cygwin Ports
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