Error on CMake

[daniele-baccega]

Hello,
I've just obtained this error during the compilation and I have no idea on how to solve it:

CMake Error at build/_deps/flamegpu2-src/src/CMakeLists.txt:417 (source_group):
  source_group ROOT:
  /home/trustalert/Desktop/cottolengo-hospital-flame-gpu-2/build/_deps/flamegpu2-src
  is not a prefix of file:
  /home/trustalert/Desktop/cottolengo-hospital-flame-gpu-2/build/_deps/flamegpu2-build/FLAMEGPU/src/flamegpu/version.cpp

Thank you again for your help

[Robadob]

It's possible that the merge of #1062 has broken something, as this was messing around with source trees.

You might be able to fix it by regenerating your build directory, otherwise I would suggest pinning FLAMEGPU_VERSION within cmake to 71a0501, which predates that PR.

@ptheywood knows the CMake stuff far better than I, so he'll be the one to give you a clearer response in the near future (He's just gone on leave until Wednesday).

[daniele-baccega]

I tried to regenerate the build directory, but it fails the same. Trying to use FLAMEGPU_VERSION equals to 71a0501 fails with a fatal: invalid reference: 71a0501

[Robadob]

@ptheywood is looking into it now, will hopefully have a fix (or revert) soon.

[ptheywood]

I've addressed this in #1113, which I have now merged into master. I've only tested this behaves under windows, but I expect linux should be fine.

You'll need to reset your FLAMEGPU_VERSION to master, and a fresh build directory might be needed (but shouldn't).

Unfortunately during #1062 I overlooked the fact that the dynamic version.cpp file within the FLAMEGPU target is not a child of the flamegpu2 repo clone when fetched via CMake.

I tried to regenerate the build directory, but it fails the same. Trying to use FLAMEGPU_VERSION equals to 71a0501 fails with a fatal: invalid reference: 71a0501

When pinning against a commit hash, as @Robadob has suggested, you also need to set FLAMEGPU_VERSION_ALLOW_HASH to ON in your models CMakeLists.txt. This is not possible by default to make fetching FLAME GPU 2 much more lightweight (faster, uses less network and disk storage).

I.e uncomment the following line from the FLAMEGPU2-model-template-cpp

# set(FLAMEGPU_VERSION_ALLOW_HASH "ON")

[daniele-baccega]

Thank you very much!