Re: gnulib and automake

[Benjamin Lindner]

Benjamin Lindner wrote:
> John W. Eaton wrote:
> > I updated the patch here:
> >
> >   http://jweaton.org/automake-diffs.gz
> >
> > Please start with this newer version of the patch if you decide to try
> > any further debugging.
>
> sure,
> I'll start a new clean trial and report back.

It seems that one prerequisite to get shared libraries built using 
libtool, one has to specify "-no-undefined" as libtool's link options.
See e.g. 
http://readlist.com/lists/lists.sourceforge.net/mingw-users/0/3404.html

What it the correct way in automake to get this flag into the link 
options (preferably only for the *-*-mingw* platform)?

I now patch all makefile.in files, but these are generated (by automake 
I guess). I couldn't find the source for the link commands as

libcruft_la_LINK = $(LIBTOOL) --tag=CXX $(AM_LIBTOOLFLAGS) \
        $(LIBTOOLFLAGS) --mode=link $(CXXLD) $(AM_CXXFLAGS) \
        $(CXXFLAGS) $(libcruft_la_LDFLAGS) $(LDFLAGS) -o $@

which I modified to

libcruft_la_LINK = $(LIBTOOL) --tag=CXX $(AM_LIBTOOLFLAGS) \
        $(LIBTOOLFLAGS) --mode=link $(CXXLD) -no-undefined $(AM_CXXFLAGS) \
        $(CXXFLAGS) $(libcruft_la_LDFLAGS) $(LDFLAGS) -o $@

but that's not really a nice solution.

Is there an additional libtool makefile variable, something like 
$(libtool_LDFLAGS) ?
Or can one define an additional individual variable like 
$(libtool_NOUNDEFINED) which is empty by default, and set to 
"-no-undefined" for mingw platform?

benjamin