[Mingw-users] linking libraries

[Schuster, J. (N-Compaq) <joe...@lm...>]

Question on linking.

I'm trying to link a little test program against opengl32 just to test this out.

I'm doing all this under MSYS with MinGW.

###########################
#include <GL/gl.h>

void glEnable(GLenum);

int main()
{
        glEnable(0);
}

##############################
# file name test.cpp

If I try to compile like this:

>>> g++ -o test test.cpp

I get this:

test.cpp: undefined reference to `glEnable@4'

Which is expected.

Now I add the library:

>>> g++ -lopengl32 -o test test.cpp 

And I get this:

test.cpp: undefined reference to `glEnable@4'

So I figure that it can't find the library...

>>> g++ -L/mingw/lib -lopengl32 -o test test.cpp

But:

test.cpp: undefined reference to `glEnable@4'

Now... I add the library to the end as another object and it works:

>>> g++ -o test test.cpp /mingw/lib/libopengl32.a 



This doesn't make any sence to me since the MinGW FAQ says that it should work correctly in the first way.

So what am I doing wrong?

ALSO. As I was playing around with this I went and got the OPENGL32.DLL from the system32 windows
directory and created and import library from that using:

>>> pexports.exe OPENGL32.DLL | sed "s/^_//" > opengl32.def
>>> dlltool -U -d opengl32.def -l libopengl32.a

Now this one doesn't work at all with my little test program because all the @* stuff is missing off of all
the functions. As per 'nm' of the *.a files.

So now I have two questions.

1. Where did the libopengl32.a file come from that is in the /mingw/lib directory if not from pexports/dlltool

2. Again, why can't I link normally using the -L and -l switches?
	(BTW - I also have the same problem with the SDL library that I built under MinGW, so it's not just
       for windows dlls and import libraries)