Qt Creator - Linking in 2.6.0

kantaki

Hello,

I am unable to add any library. Currently I want to use glfw in qtcreator. Its compiled under mingw.

I added the following lines in the .pro file

@INCLUDEPATH += C:/glfw/include
LIBS += -LC:/glfw/lib-mingw@

But when I compile the glfw hello world program I get tons of different undefined reference errors. So I guess the linking didn't work. Where is the mistake?

koahnig

One thing for sure the LIBS declaration is not complete. Checkout "qmake-libs":http://qt-project.org/doc/qt-4.8/qmake-variable-reference.html#libs You have only the path declaration with the capital 'L'. You need to specify also the lib itself with lower case 'l'.

kantaki

I tried now this

@INCLUDEPATH += C:/glfw/include
LIBS += -LC:/glfw/lib -lglfw@

but I still get the same undefined reference errors. :(

koahnig

You should post the error messages then.

kantaki

for this program
@
#include <GL/gl.h>
#include <GL/glfw.h>

#include <stdlib.h>
int main()
{
if(glfwInit())
{
return 0;
}
return 0;
}@

error: undefined reference to `glfwInit'

error: collect2: ld returned 1 exit status

koahnig

Where is the library placed? Provide path and name of lib.
Note, you changed the path to the lib between your first and second post.

kantaki

yes i changed the name of the lib folder because I thought the hyphen maybe causes trouble.

the lib is located at C:/glfw
include /
GL/
glfw.h

lib/
glfw.dll
libglfw.a
libglfwdll.a

koahnig

The only things I would try is to make sure that:

qmake was run after changes to .pro.
Making sure that the same MinGW version was used for compilation of the lib and the my code.
Since the project is still rather small, you can easily do a complete rebuild.
It looks like there is only a release version of the lib available. AFAIK you may mix debug and release version, but I do not myself. So I would try to avoid.

Otherwise I am lost here.