gcc not seeing libraries

kuloch · 08-30-2008, 01:02 PM

I'm trying to compile an example program that uses GLUT (already have tested GLUT as working), but it doesn't seem to see other required libraries that are present, even when I specify the library path with -L.

Here's the command that Makefile is calling - after I edited it to use the correct paths - and the immediate error:

Code:

gcc -o example1 -L/usr/lib example1.o -lglut -lXmu -lXext -lXi -lX11 -lm  
/usr/bin/ld: cannot find -lXmu

/usr/lib/libXmu.so.6 exists (as a symlink to /usr/lib/libXmu.so.6.2.0), so I don't understand the problem. And it shouldn't even be necessary to specify -L/usr/lib, as it finds /usr/lib/libglut.so just fine without any -L flag.

***EDIT***

Bah, I'm sorry. Only after posting did I notice that it looked funny to have 'libglut.so' but no 'libXmu.so', so I tried making a symlink. Bam, it suddenly works.

knudfl · 08-30-2008, 09:30 PM

Welcome to Linux Questions.

When you are compiling, it is "always" the
'libsomething.so' that is used.

And the correct way to handle it is to install
that library -devel version.
( e.g. 'libXmu-devel' or 'libxmu-dev' , same lib,
different names in different Linux's )

These packages -devel contains some headers
too ( file.h ) which you might be missing too,
so it's a good idea installing the packages.

Regards