ld não consegue encontrar libGL (driver 16.04LTS x64 + Nvidia)

Question

Eu costumava update-alternativesselecionarnvidia-367como provedor do opengl.

eu executei o ldconfig

Verifiquei se todos os links simbólicos são válidos e apontam para a pasta correta·

root@laptop:/etc/ld.so.conf.d# ls -halt
lrwxrwxrwx   1 root root  41 sep.   2 18:59 i386-linux-gnu_EGL.conf -> /etc/alternatives/i386-linux-gnu_egl_conf
lrwxrwxrwx   1 root root  40 sep.   2 18:59 i386-linux-gnu_GL.conf -> /etc/alternatives/i386-linux-gnu_gl_conf
lrwxrwxrwx   1 root root  43 sep.   2 18:59 x86_64-linux-gnu_EGL.conf -> /etc/alternatives/x86_64-linux-gnu_egl_conf
lrwxrwxrwx   1 root root  42 sep.   2 18:59 x86_64-linux-gnu_GL.conf -> /etc/alternatives/x86_64-linux-gnu_gl_conf

root@laptop:/etc/alternatives# cat x86_64-linux-gnu_gl_conf 
/usr/lib/nvidia-367
/usr/lib32/nvidia-367

mas ainda assim, quando passo -Wl,--verbosepara g++ durante a construção do meu projeto, recebo o seguinte:

[...]
attempt to open /home/lennart/Qt/5.7/5.7/gcc_64/lib/libGL.so failed
attempt to open /home/lennart/Qt/5.7/5.7/gcc_64/lib/libGL.a failed
attempt to open /usr/lib64/libGL.so failed
attempt to open /usr/lib64/libGL.a failed
attempt to open /usr/lib/gcc/x86_64-linux-gnu/4.9/libGL.so failed
attempt to open /usr/lib/gcc/x86_64-linux-gnu/4.9/libGL.a failed
attempt to open /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu/libGL.so failed
attempt to open /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu/libGL.a failed
attempt to open /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../../lib/libGL.so failed
attempt to open /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../../lib/libGL.a failed
attempt to open /lib/x86_64-linux-gnu/libGL.so failed
attempt to open /lib/x86_64-linux-gnu/libGL.a failed
attempt to open /lib/../lib/libGL.so failed
attempt to open /lib/../lib/libGL.a failed
attempt to open /usr/lib/x86_64-linux-gnu/libGL.so failed
attempt to open /usr/lib/x86_64-linux-gnu/libGL.a failed
attempt to open /usr/lib/../lib/libGL.so failed
attempt to open /usr/lib/../lib/libGL.a failed
attempt to open /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../libGL.so failed
attempt to open /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../libGL.a failed
attempt to open //usr/local/lib/x86_64-linux-gnu/libGL.so failed
attempt to open //usr/local/lib/x86_64-linux-gnu/libGL.a failed
attempt to open //lib/x86_64-linux-gnu/libGL.so failed
attempt to open //lib/x86_64-linux-gnu/libGL.a failed
attempt to open //usr/lib/x86_64-linux-gnu/libGL.so failed
attempt to open //usr/lib/x86_64-linux-gnu/libGL.a failed
attempt to open //usr/local/lib64/libGL.so failed
attempt to open //usr/local/lib64/libGL.a failed
attempt to open //lib64/libGL.so failed
attempt to open //lib64/libGL.a failed
attempt to open //usr/lib64/libGL.so failed
attempt to open //usr/lib64/libGL.a failed
attempt to open //usr/local/lib/libGL.so failed
attempt to open //usr/local/lib/libGL.a failed
attempt to open //lib/libGL.so failed
attempt to open //lib/libGL.a failed
attempt to open //usr/lib/libGL.so failed
attempt to open //usr/lib/libGL.a failed
attempt to open //usr/x86_64-linux-gnu/lib64/libGL.so failed
attempt to open //usr/x86_64-linux-gnu/lib64/libGL.a failed
attempt to open //usr/x86_64-linux-gnu/lib/libGL.so failed
attempt to open //usr/x86_64-linux-gnu/lib/libGL.a failed
[...]
/usr/bin/ld: cannot find -lGL
collect2: error: ld returned 1 exit status

Como você pode ver, não há menção à pasta nvidia-367 em lugar nenhum, mesmo que ld config esteja claramente configurado para visualizá-la.

O que da?