Re: [Plplot-devel] installed examples are semi-broken by recent changes

[Rafael L. <rla...@us...>]

* Alan W. Irwin <ai...@us...> [2004-01-02 16:38]:

> On 2004-01-02 23:03+0100 Rafael Laboissiere wrote:
> 
> > Could you please send to me the result of:
> >
> >     grep ^dependency_libs src/.libs/libplplotd.lai
> 
> dependency_libs=' /usr/lib/libfreetype.la /usr/local/plplot_at/lib/libcsirocsa.la /usr/local/plplot_at/lib/libcsironn.la -lqhull -lm -ldl'
> 
> That is correct so I looked further. Recall that I copied the plplotd-f77.pc
> files from the _build_ tree and set PKG_CONFIG_PATH to . to get the bad
> result.

Yes, copying the file from the build tree instead of that one from the
installed tree was the mistake, as you already noticed.

> A side question: for building the examples in the build tree (which I
> rarely do) could this be a problem?

Yes, because the *.pc only get fully substituted when installed in the final
destination.  PKG_CONFIG_PATH won't help in this case.  I will have to make
lots of changes in pkgcfg/* in order to make it works otherwise.

> Getting back to the installed tree case, however, I find
> 
> grep Libs /usr/local/plplot_at/lib/pkgconfig/plplotd-f77.pc
> Libs: -L${libdir} -lplplotf77d  -lplplotd -lfreetype -lcsirocsa -lcsironn
> -lqhull -ldl -L/usr/lib/gcc-lib/i386-linux/2.95.4 -lg2c -lm
> 
> and if I do the correct thing and set PKG_CONFIG_PATH to
> /usr/local/plplot_at/lib/pkgconfig (it turns out to be important _not_ to
> have the trailing slash)
> 
> then finally the correct result in the _installed_ examples/f77 is obtained:
> 
> pkg-config --cflags --libs plplotd-f77
>  -I/usr/local/plplot_at/include/plplot   -L/usr/local/plplot_at/lib -L/usr/lib/gcc-lib/i386-linux/2.95.4 -lplplotf77d -lplplotd -lfreetype -lcsirocsa -lcsironn -lqhull -ldl -lg2c -lm

Good news for you: my last changes in cvs implemented your idea about
setting the PKG_CONFIG_PATH in the Makefile.examples.

> However, I still had to set LD_LIBRARY_PATH for the resulting executable
> when I manipulate the Makefile to actually link with this result because
> rpath is not specified on the link line.

Since I do all my tests by installing the resulting Debian package, I never
need to set LD_LIBRARY_PATH.  This is why I am not so attentive to the rpath
issues.  I will look at this.  Could you please send me the output of:

    cd examples/c
    make x01c

when you use the plplot_libtool approach and an installation in a
non-standard prefix?


> Also, one other minor glitch I noticed is you have the wrong command
> (should be $(G77) not $(CC) for examples/f77/Makefile.examples.in.

Fixed in my last commit.

> So there are still some minor glitches to be sorted out for the special
> prefix case (including the LIB_DIR hard variant we already discussed), but
> it doesn't look like there are going to be any real showstoppers.

Also Hopefully fixed.

> Thanks very much for your efforts in getting this all sorted out.  We may
> be setting the default back to pkg-config rather quickly!

Hopefully.

-- 
Rafael