There is nothing to compile here. This only provides a header file for an environment definition. Read the instruction of raisimGym.
python setup develop
cd raisimGymTorch/env/envs/rsg_anymal && python ./runner.py
python setup develop
python raisimGymTorch/env/envs/rsg_anymal/tester.py --weight data/roughTerrain/FOLDER_NAME/full_XXX.pt
python raisimGymTorch/env/envs/rsg_anymal/runner.py --mode retrain --weight data/roughTerrain/FOLDER_NAME/full_XXX.pt
python setup develop --Debug
. This compiles