Re: Build problem on Cygwin

[Lars Clausen <lrclause cs uiuc edu>]

On Tue, 8 Jul 2003, Gerrit P. Haase wrote:
> Hallo dia-list,
> 
> I got a problem here with Dia on Cygwin.
> 
> I use libtool and all works fine, besides some minor modifications to
> the base files for the autogenerated files (and recreation of
> Makefile.in & configure et.al) I have not changed the source to build
> it.  However, I doesn't work.  The first problem seems to be in
> lib/plug-ins.c.  It should figure out that libtool is used (which is
> default on non Windows platform, then use the .la file to find the
> real name of the module/plug-in to load.  But as I ran into the
> problems, I saw that dia requires the modules to be named in the usual
> unix fashion (libxyz.so instead of cygxyz.dll as it is on Cygwin).
> 
> It is probably this part of plug-ins.c (this_is_a_plugin()) where .so
> is hardcoded and the name of the library is basename of 'libxyz.la'
> (='libxyz') plus '.so': 
> 
> #if USING_LIBTOOL
>   basename = g_strndup(name,len-PLUG_IN_EXT_LEN);
>   soname = g_strconcat(basename,".so",NULL);
> ...
> 
> This is wrong, since we have already the function which looks up the
> filename: find_real_filename(), it should also be used?
> 
> I changed this to be:
> #if USING_LIBTOOL
>   basename = g_strndup(name,len-PLUG_IN_EXT_LEN);
>   soname = find_real_filename(name);
> ...
> 
> and it works as expected.
> 
> Now I can run dia (without renaming cygxzy.dll files to libxyz.so
> files), however, another error came up, it says "cannot load
> /usr/lib/cygxslt.dll" which is probably a similar problem (but not the
> same), because the imortlib used for linking is 'libxslt.la' but the
> name of the DLL in the klibtool library is '../bin/cygxslt-1.dll', the
> importlib is 'libxslt.dll.a' and therefore, I have no idea why dia
> wants to load a "cygxslt.dll".  I also have not looked up the relevant
> part in the code.
> 
> I have no patch attached yet, see it as a heads-up because it seems
> there are some more parts which need to be fixed for a successful
> build on Cygwin (and other, non-.so platforms).

Looking forward to it.  The more compilation, the better.

> Anyway, many thanks for providing such an interesting piece of code to
> the open source community,

Thanks go to Alex, primarily, for building a good base.

-Lars

-- 
Lars Clausen (http://shasta.cs.uiuc.edu/~lrclause)| HĂ„rdgrim of Numenor
"I do not agree with a word that you say, but I   |----------------------------
will defend to the death your right to say it."   | Where are we going, and
    --Evelyn Beatrice Hall paraphrasing Voltaire  | what's with the handbasket?