Re: [Plplot-general] libqhull

[Rafael L. <lab...@ps...>]

* Christophe TROESTLER <deb...@ti...> [2003-03-14 14:49]:

> When I try to compile the "c" examples with "make" I get
> 
> plplot_libtool --mode=link gcc x01c.c -I/usr/include/plplot -L/usr/lib -lplplotd -o x01c
> plplot_libtool: link: cannot find the library `/usr/lib/libqhull.la'
> make: *** [x01c] Error 1
> 
> What is the matter?  I got
> 
> ii  libplplot-dev 5.2.0.cvs.20030307-1
> ii  libplplot5    5.2.0.cvs.20030307-1   Scientific plotting library
> ii  plplot-doc    5.2.0.cvs.20030307-1
> ii  plplot-gd     5.2.0.cvs.20030307-1
> ii  plplot-tcl    5.2.0.cvs.20030307-1
> ii  plplot-xwin   5.2.0.cvs.20030307-1
> ii  libqhull4     2002.1-3       Calculate convex hulls and related structure
> 
> installed, but they do not contain anything like libqhull.la !
>                                                           ^^

Short answer:  apt-get install libqhull-dev (Oh, I love Debian! :-). 

Long answer: This is a bad side-effect of using plplot_libtool, instead of a
full-fledged solution with the right libraries put in the Makefile. The
problem comes from here:

    $ grep libqhull /usr/lib/libplplotd.la 
    dependency_libs='/usr/lib/libfreetype.la -lz /usr/lib/libcsa.la
    /usr/lib/libnn.la /usr/lib/libqhull.la -lm -ldl'

I may try to find a way to force the use of "-lqhull" instead of
"/usr/lib/libqhull.la" in that file, because libqhull is not provided by the
PLplot pakcage.  Same thing for -lfreetype.  I dunno if this is possible
with libtool, but I will look at it.

Otherwise, I will probably add a dependency on libqhull-dev and
libfreetype6-dev to libplplot-dev. For now, since you are doing compilation
(i.e., development) it is appropriate to install the libqhull-dev package,
as suggested in the short answer above.  Install also libfreetype6-dev, just
in case.

Last comment: The next time you find a problem in a Debian package
(specially if it is only related to the Debian packages themselves), please
send a bug report to the Debian BTS (Bug Tracking System).  You will always
be able to Cc: to plplot-devel, if you wish.  If you do not know what I am
talking about:

    apt-get install reportbug

-- 
Rafael