Linking Issue When Using "make"

Applications
1

Hello. I’ve only been using Geant4 for a few months now and am attempting to build my own simple program within G4. The purpose of this is to output a list of solar spectra data. I’ve modeled the application structure after the examples provided, as shown below:

: /mnt/c/Users/namth/Desktop/Research/GEANT4/geant4-install/share/Geant4-10.6.1/G4EXOP$ ls
B1test B1test-build solarData solarData-build

: …/GEANT4/geant4-install/share/Geant4-10.6.1/G4EXOP/solarData$ ls
CMakeLists.txt include solarData.cc solarData.cc.o solarData.out src

: …/GEANT4/geant4-install/share/Geant4-10.6.1/G4EXOP/solarData/include$ ls
kurucz_irradiance.hh kurucz_resid_flux.hh solarData.cc.o

: …/GEANT4/geant4-install/share/Geant4-10.6.1/G4EXOP/solarData/src$ ls
KuruczFluxResid.txt KuruczIrradiance.txt kurucz_irradiance.cpp kurucz_resid_flux.cpp solarData.cc solarData.cc.o

Now, I’ve also rewritten CMakeLists.txt to what I believe should be the correct format given the specifics of my application. Using the DGeant4_DIR cmake command in my build directory works fine. However, when I use the “make” command inside my build directory, I receive the following errors:

solaradataubuntu2
solaradataubuntu21197×453 21.4 KB

Clearly this appears to be a linking issue where CMakeFiles/solarData.dir/solarData.cc.o cannot find my header/source files to be able to access the functions in the main program. I do not know how to fix this. I’ve been trying to use commands to establish a link from solarData.cc.o to ./src or ./include such as “ld” but it gives the same errors. Any help with this would be fantastic.

Thanks for your time.

2

Where is SolarFluxResid defined? Looks like something in solarData.cc tries to use the SolarFluxResid functions but they have not been defined/compiled as part of the project.

Is it in kurucz_resid_flux.cpp? Is that file referenced in you CMakeLists.txt file?

3

@php1ic Thank you for the reply. The SolarFluxResid class is defined inside kurucz_resid_flux.hh, with the member functions being defined inside the kurucz_resid_flux.cpp.

In my CMakeLists.txt file, the headers are compiled using the command include_directories(${PROJECT_SOURCE_DIR}/include)
and I believe then located and linked using
file(GLOB headers ${PROJECT_SOURCE_DIR}/include/*.hh)
add_executable(solarData solarData.cc ${sources} ${headers})

I did not change the above when adapting the CMakeLists.txt, but I’ve pasted the commands from CMakeLists.txt below which I did edit. Perhaps I’ve made a mistake here that I cannot seem to find. The “project” in the CMakeLists file is solarD, as seen below. In add_executable, do I need to include solarData if solarData.cc is the actual main executable?

add_executable(solarData solarData.cc ${sources} ${headers})
target_link_libraries(solarData ${Geant4_LIBRARIES})

set(SOLARDATA_SCRIPTS
solarData.out
)

add_custom_target(solarD DEPENDS solarData)

install(TARGETS solarData DESTINATION bin)

4

How is the sources variable defined? If it is the same way as in a ‘normal’ geant4 CMakeLists.txt file, i.e.

file(GLOB sources ${PROJECT_SOURCE_DIR}/src/*.cc)

Then it will not be picking up the .cpp file.

Also, in the snippet you posted, you have missed the $ sign to actually access the sources and headers variable. Is this just a typo?

5

@php1ic This was the exact issue. I changed the suffixes from .cpp to .cc and it worked like a charm. Figures it was something that small. I very much appreciate your help.

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