No OpenGL 3 headers in Arch Linux

Question

I'm trying to compile a very simple “Hello world” OpenGL 3.3 program using FreeGLUT. In all the tutorials I found, they include an header “gl3.h”. The problem is, I don't have such header file.

$ ls -l /usr/include/GL/
total 2164
-rw-r--r-- 1 root root   8797 20 janv. 17:44 freeglut_ext.h
-rw-r--r-- 1 root root    681 20 janv. 17:44 freeglut.h
-rw-r--r-- 1 root root  26181 20 janv. 17:44 freeglut_std.h
-rw-r--r-- 1 root root 837247 27 janv. 12:55 glew.h
-rw-r--r-- 1 root root 656589 21 mars  18:07 glext.h
-rw-r--r-- 1 root root  84468 21 mars  18:07 gl.h
-rw-r--r-- 1 root root 128943 21 mars  18:07 gl_mangle.h
-rw-r--r-- 1 root root  17255 21 mars  18:07 glu.h
-rw-r--r-- 1 root root   3315 21 mars  18:07 glu_mangle.h
-rw-r--r-- 1 root root    639 20 janv. 17:44 glut.h
-rw-r--r-- 1 root root  62741 27 janv. 12:55 glxew.h
-rw-r--r-- 1 root root  43887 21 mars  18:07 glxext.h
-rw-r--r-- 1 root root  17170 21 mars  18:07 glx.h
-rw-r--r-- 1 root root   4706  3 févr. 13:33 glxint.h
-rw-r--r-- 1 root root   3463 21 mars  18:07 glx_mangle.h
-rw-r--r-- 1 root root   2086  3 févr. 13:33 glxmd.h
-rw-r--r-- 1 root root  80979  3 févr. 13:33 glxproto.h
-rw-r--r-- 1 root root  11246  3 févr. 13:33 glxtokens.h
drwxr-xr-x 2 root root   4096 14 avril 14:03 internal
-rw-r--r-- 1 root root   8497 21 mars  18:07 osmesa.h
-rw-r--r-- 1 root root  51274 21 mars  18:07 vms_x_fix.h
-rw-r--r-- 1 root root  59403 27 janv. 12:55 wglew.h
-rw-r--r-- 1 root root  41377 21 mars  18:07 wglext.h
-rw-r--r-- 1 root root   4468 21 mars  18:07 wmesa.h

In /usr/include/ I only have GL , GLES and GLES2 . There is no GL3 as I found in some tutorials.

I'm running on Arch Linux x86_64 with a NVIDIA graphic card ( nvidia closed-source driver).

Here is how I included OpenGL and FreeGLUT APIs in my program:

#define GL3_PROTOTYPES 1
#include <GL/gl.h>
#include <GL/freeglut.h>

But the code doesn't compile:

$ g++ -pipe -g -Wall -Wextra -pedantic -I. -IHeaders -c Sources/Main.cpp -o Temp/Objects/Main.o 
Sources/Main.cpp: In function ‘int main(int, char**)’:
Sources/Main.cpp:107:59: error: ‘glVertexAttribPointer’ was not declared in this scope
Sources/Main.cpp:108:30: error: ‘glEnableVertexAttribArray’ was not declared in this scope
Sources/Main.cpp:114:35: error: ‘glUseProgram’ was not declared in this scope
Sources/Main.cpp:138:31: error: ‘glDisableVertexAttribArray’ was not declared in this scope

It seems I included the OpenGL 2 headers! But, again, I didn't find any OpenGL 3 headers on my system, I looked at the Arch repository and AUR, unsuccessfully.

Thank you for your help!

Answer 1

You don't need a GL3.h, the GL3.h just got rid of all deprecated features. So just include gl.h instead of gl3.h . Downloading and manually copyieng into /usr/include/GL/ is not a real solution, it works yes, but what happens if the add to the mesa package the gl3.h ? You're package manager will find conflicts. Better you add the gl3.h to your project or into your home directory and add it to the $PATh or use the -I flag.

Answer 2

If you grep for glVertexAttribPointer, glEnableVertexAttribArray, glUseProgram and glDisableVertexAttribArray, you will find that they are included in glext.h and glew.h . Try to include one of these headers and compile again.