View Full Version : How do I compile a .c file that uses glm.h? ["undefined references"]

05-17-2013, 05:25 PM
Hello guys,

I'm writing a simple code (using gedit on Ubuntu) in C to import a 3d model (.obj).

In my code I'm using the library "glm.h" and I'm using the following commands:

GLMmodel* f16;
f16 = (GLMmodel*)malloc(sizeof(GLMmodel));
f16 = glmReadOBJ("./objs/f16.obj");

in order to compile, I'm using the following line:
gcc -Wall test.c -o test -lglut

but terminal prints the following errors:

"undefined reference to glmDraw
undefined reference to glmReadObj"

What can I do to compile my code correctly?

05-21-2013, 02:00 AM
glm.h is the header file of the library. somewhere in your system, probably in /usr/lib, there has to be something like libglm.so or similar, which is the library itself.
in general, header files like glm.h are for compilation only. if you compile without linking (gcc -c test.c), there should be no error. if you want to create an executable,
you have to list the library dependencies. you have already added -lglut to link to libglut.so, so you have probably to add -lglm (assuming that the lib glm is named
libglm.so). so, in total, try: gcc -Wall test.c -o test -lglut -lglm