Re: Questions on exporting functions from a shared library

[Jef Driesen]

Ralf Wildenhues wrote:
> * Jef Driesen wrote on Wed, Oct 08, 2008 at 10:24:46AM CEST:
> > I am shipping the symbols file. In my Makefile.am, I have
> >
> > EXTRA_DIST = mylib.symbol
> >
> > to make sure the file is included in the tarball.
> >
> > But with this approach, msvc users will need to (manually) generate a  
> > DEF file from it. And that is something I would like to avoid.
>
> Hmm.  I suppose shipping the DEF file for them (for one setup?) won't
> work?

Shipping a DEF file matching the default features would be a 
possibility. But if someone wants to enable/disable some features, 
they'll have to modify that file, and I have to make sure I always 
update both the symbols and DEF file.

> > > > Note: How do can I detect whether the visibility attribute is supported?
> > > For example with the gnulib module 'visibility'.
> > How do I use this visibility.m4 file? Do I need to copy its contents  
> > into my configure.ac file?
>
> No, you ship it additionally; see the AC_CONFIG_MACRO_DIR description here:
> <http://www.gnu.org/software/autoconf/manual/html_node/Input.html#Input>
>
> Typically, you just import the whole gnulib module:
> <http://www.gnu.org/software/gnulib/manual/html_node/Invoking-gnulib_002dtool.html>

I'll have a look at that.

> > BTW, what is the reason that when I use mylib_la_CFLAGS = -DMYLIB_BUILD,  
> > in Makefile.am, all my object files are named "mylib_la-myfile.o"  
> > instead of the regular "myfile.o"?
>
> Addressed here:
> <http://www.gnu.org/software/automake/manual/html_node/renamed-objects.html>

I was already thinking in that direction, but since there is only one 
target that needs to be build in my case, there is no need to rename 
object files and I assumed automake would not rename. That's why I 
curious whether there was another reason that could cause this.