GL library missing for webchannel example

All,

I'm probably just being thick on Sunday morning. I installed the 5.4.x everywhere package locally on Ubuntu 12.4.5 32-bit. After finding the qwebchannel.js file on-line and putting it in the proper place I try to build the example as is and receive the following:

make: Entering directory `/home/developer/Qt5.4.2/Examples/Qt-5.4/webchannel/build-standalone-Desktop_Qt_5_4_2_GCC_32bit-Release'
g++ -Wl,-O1 -Wl,-rpath,/home/developer/Qt5.4.2/5.4/gcc -Wl,-rpath,/home/developer/Qt5.4.2/5.4/gcc/lib -o standalone main.o websockettransport.o websocketclientwrapper.o moc_websockettransport.o moc_websocketclientwrapper.o -L/home/developer/Qt5.4.2/5.4/gcc/lib -lQt5Widgets -lQt5Gui -lQt5WebChannel -lQt5Qml -lQt5WebSockets -lQt5Network -lQt5Core -lGL -lpthread
/usr/bin/ld: cannot find -lGL
collect2: ld returned 1 exit status
make: Leaving directory `/home/developer/Qt5.4.2/Examples/Qt-5.4/webchannel/build-standalone-Desktop_Qt_5_4_2_GCC_32bit-Release'
make: *** [standalone] Error 1
11:28:34: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project standalone (kit: Desktop Qt 5.4.2 GCC 32bit)
When executing step "Make"

Thick headed question 1: Since it doesn't have a Qt in front, is this version built to use openGL and I simply need to install openGL development files?

I know, try it and find out ...but... I'm trying to come up with reproducible instructions for creating a development environment from bare metal so others can build their environments and they will all build the same. I don't want to randomly install things then figure out what actually worked.

Thanks,

Added after 50 minutes:

I hate to admit it, but DuckDuckGo has let me down twice this weekend. Out of desperation I used bing.com and found this link. (Yes, using anything Microsoft is an act of sheer desperation for me <Grin>)

http://stackoverflow.com/questions/1...annot-find-lgl

which then inspired me to search further and find this link (sadly with bing again)

http://stackoverflow.com/questions/1...file-or-direct

Now on to the next hurdle with this example. Awful lot of people seem to be having trouble getting this example to build and run.