Linker problem: can't find a file, but the file exists

atlep · 08-16-2004, 05:30 AM

Hello everybody. I'm new here, searching for knowledgable forum to post my linux problems. This is the third forum I try to get help for the following problem.

I try to compile a simple GL-program using glut. But even though the libraries should be installed, the linker cannot find them. Here's an illustration:

Code:

$ gcc simplegl.o -L /usr/X11R6/lib/ -lGL -lGLU -lglut -o simplegl 
 /usr/bin/ld: cannot find -lglut 
 collect2: ld returned 1 exit status 
 
 $ locate libglut 
 /usr/X11R6/lib/libglut.so.3 
 /usr/X11R6/lib/libglut.so.3.7.1 
 
 # ldconfig -p | grep glut 
libglut.so.3 (libc6) => /usr/X11R6/lib/libglut.so.3

As you can see, libglut exits, but the linker still claims it can't find it. Why might that be?

Some extra, possibly relevant, information:
Dist: Mandrake 10.0
The glut libs were installed from the distribution. However, the header files were not. So these are copied from: [cannot post url before five posts] www_ibiblio_org/pub/packages/development/graphics/glut/glut-3.5.tar.gz

I hope someone can help me, since all simple 'getting started' openGL examples seem to be using glut.

infamous41md · 08-16-2004, 05:40 AM

i'm not sure what's going on there, but if you want to workaround w/e is going on, just pass the shared lib on command line, ie:
gcc simplegl.o -L /usr/X11R6/lib/ -lGL -lGLU -o simplegl /usr/X11R6/lib/libglut.so.3

atlep · 08-16-2004, 05:48 AM

Thank you, that worked liked a charm. The program even executed perfectly!

I would still like to know if someone has any ideas about the problem posted, though. As I am sure an answer to this would provide me with some more understanding about how the compiler and linker works.

I will be happy to follow this thread and try most suggestions, in order to work out the problem.

Yeah, and it looks like I found my forum

infamous41md · 08-16-2004, 05:52 AM

stupid un deletable posts damn you

infamous41md · 08-16-2004, 05:53 AM

http://www.linuxquestions.org/questi...hreadid=210728

atlep · 08-16-2004, 06:15 AM

I looked through the page, but couldn't find anything directly related to my problem. Since your above suggestion worked, it does not appear that I need to link any other libraries. And it also proves that the library is where it should be.

The only thing I can think of is some ....... (where's a light-bulb smilie when you need one)

Yep, and problem is solved

It seems the linker needs to find libglut.so and that libglut.so.3 was not enough. Would've thought the Mandrake distribution should've created that symlink when installing the libraries.

Anyways, thanks for your help. A little reading around the problem helped kick-start the necessary brain cells.