GLFW3 - Undefined reference to XRR

Question

I am trying to compile a very simple OpenGL program that uses GLFW3. Despite linking everything I deem necessary, I\'m getting a plethora of undefined references.

Answer 1

I figured out the answer myself while writing the question.

I was misled into believing that I was linking everything necessary because of the output of

pkg-config --libs --cflags --print-requires glfw3 

which was

-I/usr/local/include  -L/usr/local/lib -lglfw3  

The --print-requires flag was having no impact at all on the output, which seemed odd. I searched and printed the corresponding .pc file.

sudo find / | grep "glfw3\.pc"
cat /usr/local/lib/pkgconfig/glfw3.pc 

There I found this.

Requires.private:  x11 xrandr xi xxf86vm gl

Which indicates which libraries are required for static linking. I added their correponding flags to CMake and it worked. My mistake was that I missed the --print-requires-private flag when executing pkg-config.

I hope this helps someone save some time.