问题
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!
回答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.
回答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.
来源：https://stackoverflow.com/questions/10400072/no-opengl-3-headers-in-arch-linux