Fail if OpenMP is not found.

Author: mthrok

CMakeLists.txt

@@ -75,10 +75,7 @@ endif()
 find_package(Torch REQUIRED)
 
 if(USE_OPENMP)
-  find_package(OpenMP)
-  if (NOT OpenMP_CXX_FOUND)
-    message(WARNING "OpenMP support is disabled.")
-  endif()
+  find_package(OpenMP REQUIRED)
 endif()
 
 # TORCH_CXX_FLAGS contains the same -D_GLIBCXX_USE_CXX11_ABI value as PyTorch