Error in EventAction.cc during compilation of code

Particles, Track, Event, Run and Biasing
1

EventAction.cc:(.text+0x199): undefined reference to `TH1F::TH1F(char const*, char const*, int, double, double)’
Getting this error during make . How to resolve it

2

Sounds like you’re using ROOT directly, rather than G4analysis. Do you have all the appropriate ROOT #include statements in your code?

3

Yes I have included ROOT properly, it shows error only in this .cc file.

4

Screenshot from 2023-04-29 22-50-29
Screenshot from 2023-04-29 22-50-291920×1080 381 KB

5

Could you post your CMakeLists.txt please? I’m guessing that the needed ROOT libraries are not being linked to given the undefined reference errors.

6

CMakeLists.txt (3.7 KB)

This is my CmakeLists.txt
In old version I was compiling the code without CMakeLists.txt.

7

Thanks! All that’s needed is to modify the find_package for ROOT to find the components needed:

# Might need additional components depending on what bits of ROOT you use
find_package(ROOT REQUIRED Core RIO Hist)

and then link to the required targets:

target_link_libraries(TestEm4 ${Geant4_LIBRARIES} ${ROOT_LIBRARIES})
8

Thank you very much , It is working now.