GLEW Linker Errors (undefined reference to `__glewBindVertexArray')

3
votes

I've recently made the decision to re-write some OpenGL code for a game using im working on using non depreciated techniques. Instead of drawing primitives with glBegin() and glEnd(), i'm trying to stick to vertex array objects and such. I'm trying to get code to compile from http://www.opengl-tutorial.org/beginners-tutorials/tutorial-2-the-first-triangle/ . I've done alot of linking before but for some reason this isn't working. I'm trying to link GLEW to my project with CodeBlocks as my IDE and MinGW GCC as my compiler. How do I go about fixing this? Yes, i did link "glew32.lib"

3
openglmingwcodeblocksglew
Wild guess: maybe you need to wrap your #include <GL/glew.h> line in extern "C" { ... }? - Thomas
Also, how are you trying to link it? Including the source files, as per glew.sourceforge.net/install.html, is definitely easier. - Thomas
extern "C" { #include <gl\glew.h> } - agusterodin
this is how i'm linking. under codeblocks project build options. tinypic.com/r/fw7xx1/6 - agusterodin
For users who are look for the correct linking flag in Ubuntu: -lGLEW. - jackw11111

3 Answers

7
votes

This usually happens if you link GLEW statically, but don't inform the header about this to happen. For this you must define the preprocessor token "GLEW_STATIC". This is best done as a compiler option. In case of GCC, add -DGLEW_STATIC to your compiler command line.

1
votes

Try this:

pkg-config --libs --static glew

in the terminal. Then, copy the libs it gives you and paste after your gcc/g++ statement:

g++ <your-file-name>.cpp -o <output-file-name> -lGL -lGLU -lglfw3 -lrt -lm -ldl -lXrandr -lXinerama -lXcursor -lXext -lXrender -lXfixes -lX11 -lpthread -lxcb -lXau -lXdmcp -lGLEW -lGLU -lGL -lm -ldl -ldrm -lXdamage -lX11-xcb -lxcb-glx -lxcb-dri2 -lxcb-dri3 -lxcb-present -lxcb-sync -lxshmfence -lXxf86vm -lXfixes -lXext -lX11 -lpthread -lxcb -lXau -lXdmcp

(some are repeated above because I used glfw too)

This is supposed to solve your problem, because usually these libraries are not declared.

0
votes

If you use Linux, FLTK ui library with OpenGL, see .../bin/fltk-config file for LDLIBS. It should contain also "-lGLEW" or you can add this option to the LDLIBS parameter when compile. Of course "libglew-dev" should be installed.