OpenGL programming

By hkn at Wed, Nov 21 2007 12:58pm |

I'm trying to compile some C code (written for Linux) on OS X 10.4 and get into problems with opengl related includes. Specifically all statements of the sort

#include <GL/gl.h>

should read

#include <OpenGL/gl.h>

on the mac.

My question is: is there a way of accomplishing the same effect without acctually changing the code? I don't want to change a lot of files every time a new version of the code is released. On Linux the includes reside in /usr/includes so an easy fix here would be to add a symbolic link from GL to OpenGL, but on the Mac all the files are in a framework and I don't really know how to handle that.

Thanks

Håkan

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Mon, 2007-12-03 04:59 — boyfarrell

Hi,

Hi,

Sorry you question took so long to get a reply, you have probably sorted it out now. I don't have an answer but just some suggestions

You could add a pre-processor #if statement that way the same file would compile on both platforms. But I don't know how to find out what OS if running.

There might be some tips in the example code folder that came with the developer tools, /Developer/Examples/GULT

Alternatively, yes the symbolic links might work, but we are getting a bit hack tastic at this point! You could do it like this

ln -s source file/folder destination file/folder

DAn

Tue, 2007-12-25 22:30 — jsgonzal

This work for me, in 10.4 or

This work for me, in 10.4 or 10.5

ifdef __APPLE__
#include OpenGL/gl.h
#else
#include gl.h
#endif

best,
s
p.s.:I couldn't post the <'s

Sat, 2008-03-01 02:28 — vokuhila

using GL frameworks in the makefile

To get at the frameworks from a makefile, use the -framework argument to gcc. In all, I use these basic additions to my makefile when I build something against opengl. In principal, you should be able to adapt the syntax to use other frameworks as well:

LIBPATH += -L"/System/Library/Frameworks/OpenGL.framework/Libraries"
FRAMEWORKS = -framework GLUT
FRAMEWORKS += -framework OpenGL
GL_LIBS = -lGL -lGLU
# -- more makfile code follows....

Then add $(LIBPATH) $(FRAMEWORKS) $(GL_LIBS) into the compile part. Something like

main: main.o
  $(CC) $(FRAMEWORKS) $(CFLAGS) -o $@ $(LIBPATH) $(GL_LIBS) $(OBJECTS)

Where CC is probably gcc, and CFLAGS might be something like -Wall -O. But this is an old post. You probably solved this months ago... I thought I'd post anyway, I had to dig for this info when I first was learning to use OpenGL, maybe it helps another person digging for the same thing at some time.