Error after installing Qt [Solved]

[lanigb]

I have just installed Qt 5.3 in /opt and started a simple "Qt application with widgets" with QtCreator.

Compilation fails with
cannot find -lGL
Do I have th libGL library : yes
#locate libGL.so
/usr/lib/i386-linux-gnu/mesa/libGL.so.1
/usr/lib/i386-linux-gnu/mesa/libGL.so.1.2.0
/usr/lib/nvidia-331/libGL.so
/usr/lib/nvidia-331/libGL.so.1
/usr/lib/nvidia-331/libGL.so.331.38
/usr/lib/x86_64-linux-gnu/mesa/libGL.so.1
/usr/lib/x86_64-linux-gnu/mesa/libGL.so.1.2.0
/usr/lib32/nvidia-331/libGL.so
/usr/lib32/nvidia-331/libGL.so.1
/usr/lib32/nvidia-331/libGL.so.331.38

/usr/lib/x86_64-linux-gnu/mesa/ was not in the search path of ld so I added
/usr/lib/x86_64-linux-gnu/mesa/ to /etc/ld.so.conf.d/x86_64-linux-gnu_GL.conf

now /usr/lib/x86_64-linux-gnu/mesa is in the ld search path :
#ldconfig -v 2>/dev/null | grep -v ^$'\t'
/usr/lib/x86_64-linux-gnu/libfakeroot:
/lib/i386-linux-gnu:
/usr/lib/i386-linux-gnu:
/usr/local/lib:
/lib/x86_64-linux-gnu:
/usr/lib/x86_64-linux-gnu:
/usr/lib/x86_64-linux-gnu/mesa-egl:
/usr/lib/nvidia-331:
/usr/lib32/nvidia-331:
/usr/lib/x86_64-linux-gnu/mesa:
/lib32:
/usr/lib32:
/lib:
/usr/lib:
/usr/lib/i386-linux-gnu/sse2: (hwcap: 0x0000000004000000)
/usr/lib/nvidia-331/tls: (hwcap: 0x8000000000000000)
/usr/lib32/nvidia-331/tls: (hwcap: 0x8000000000000000)

but still can't link.
Any advice ?

TIA

Alain

[SGaist]

Hi and welcome to devnet,

Please search through the forum, this question has been asked many times. You are missing the OpenGL development package

[lanigb]

Thanks.

The solution posted at https://qt-project.org/forums/viewthread/13595 solved the problem.

Alain