Re: [Plplot-devel] libqhull

[<jc...@fe...>]

On Friday 14 March 2003 14:50, Rafael Laboissiere wrote:
| * 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.

But won't this happens in other non-debian systems that have 
qhull/freetype installed as archive and not shared libraries?
And  even if a shared library exists but it was not built with libtool?

The configure test that checks for the presence of qhull just checks 
that a program can be compiled with -lqhull, it does not check if it is 
a shared/archive library. If latter in the configure process  -lqhull 
is replaced with <absolute_path>/libqhull.la that will break the make.

Does the current plplot configure scheme address this issue? I have only 
tested with shared libs.

Joao

PS-One of the reasons why I want to be able to build the plplot docbook 
is to be able to "make dist" in order to test this issue in other 
systems.

|
| 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