[SOLVED] error: cannot find -lGL

[lele71]

Hello,
I tryed to install QT5.1.1 in Ubuntu 12.04 inside a virtual machine VMware.
If I create a new project or clean or rebuild an exist project, when i try to build i receive these error:

error: cannot find -lGL

In the file Makefile I find these row:

LIBS = $(SUBLIBS) -L/home/lele/Qt5.1.1/5.1.1/gcc/lib -lQt5Widgets -lQt5Gui -lQt5Core -lGL -lpthread

if i delete manually -lGL everything work and compilation happen whitout errors, but i would like to dont need to modificate manually the file every time when i clea or rebuild my projects.

Somebody can tell me why happen these ?

Thanks for answere Gabriele.