Example B1 Building Errors with Cmake

Getting Started
1

I setup openGl to work with Geant4 and now I’m trying to run exampled B1, which I previously had no errors building. Now when I run cmake
-DGeant4_DIR="%HOMEPATH%\Geant4\geant4_10_06-install\lib\Geant4-10.6.1" “%HOMEPATH%\Geant4\geant4_10_06-install\share\Geant4-10.6.1\examples\basic\B1”

I get the error

CMake Error at /Users/Stephen/Geant4/geant4_10_06-install/lib/Geant4-10.6.1/Geant4PackageCache.cmake:18 (geant4_set_and_check_package_variable):
geant4_set_and_check_package_variable Macro invoked with incorrect
arguments for macro named: geant4_set_and_check_package_variable
Call Stack (most recent call first):
/Users/Stephen/Geant4/geant4_10_06-install/lib/Geant4-10.6.1/Geant4Config.cmake:240 (include)
CMakeLists.txt:14 (find_package)

– Found OpenGL: opengl32
– Configuring incomplete, errors occurred!
See also “C:/Users/Stephen/Geant4/geant4_10_06-install/share/Geant4-10.6.1/examples/basic/B1-build/CMakeFiles/CMakeOutput.log”.

I read in another post that this was due to an issue locating the openGl libraries but the answer was very vague and I can’t figure out how to fix it. Any help would be much appreciated

2

Apologies, this is a bug in the Geant4PackageCache.cmake for windows. There’ll be a patch in due course, but for now, open the /Users/Stephen/Geant4/geant4_10_06-install/lib/Geant4-10.6.1/Geant4PackageCache.cmake file, and remove the geant4_set_and_check_package_variable lines that refer to OPENGL_INCLUDE_DIR and OPENGL_gl_LIBRARY. Save it, then try reconfiguring your build of B1 (no need to rebuild/install Geant4 itself).

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3

Thanks very much for the prompt reply. Running into another issue now that I am unable to pen the .cmake file to edit it? Not really sure why. If you could explain how to open a .cmake file I’d really appreciate it as I can’t seem to find any explanations online

4

.cmake files are just plain text, so can be opened in your editor of choice.

5

Got it. It’s building now with no errors, thanks very much for the help!

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