Re: FYI: update convenience.at

[Ralf Wildenhues]

Hi Olly,

Sorry for the delay.

* Olly Betts wrote on Sat, Dec 10, 2005 at 05:11:14AM CET:
> On 2005-12-03, Ralf Wildenhues <address@hidden> wrote:
> > There'll be quite a bit of systems/compilers where this will fail.
> > I wonder whether libtool should just go ahead and generate a fake
> > extra object in the case where only convenience archives are given,
> > and 'whole_archive_flag_spec' is nonempty.  Thoughts?
> 
> This (5 year old!) thread seems relevant:
> 
> http://lists.gnu.org/archive/html/automake/2000-11/msg00127.html

Yep!

> The main problem was (and I don't think this has changed) that when
> using libtool from automake you need a source file to infer the tag
> from.  For C++ this often matters, for example.

Right.

> AIUI, this is really a particular case of the more general issue that
> automake+libtool doesn't consider the languages that objects in
> convenience libraries were compiled from when deciding how to link.
> 
> Fixing this seems rather hard - you'd need to store source information
> in .la files I think.  And it's easy to work around (e.g. just add in a
> dummy C++ source when creating a library from C++ objects in convenience
> libraries).

Right again.  We could think of putting the source language(s) into .lo
files.  But really I think the workaround is much more appropriate.

I will fix convenience.at to remove those tests, and prepare a doc
update for HEAD to mention this (eventually).

Thank you for looking this up!

Cheers,
Ralf