Fortran: Support cuf file extension when using nvfortran

Modules/CMakeDetermineFortranCompiler.cmake

@@ -284,6 +284,9 @@ if(MSVC_Fortran_ARCHITECTURE_ID)
   set(SET_MSVC_Fortran_ARCHITECTURE_ID
     "set(MSVC_Fortran_ARCHITECTURE_ID ${MSVC_Fortran_ARCHITECTURE_ID})")
 endif()
+if(CMAKE_Fortran_COMPILER_ID STREQUAL "NVHPC")
+  set(CMAKE_Fortran_VENDOR_SOURCE_FILE_EXTENSIONS ";cuf;CUF")
+endif()
 # configure variables set in this file for fast reload later on
 configure_file(${CMAKE_ROOT}/Modules/CMakeFortranCompiler.cmake.in
   ${CMAKE_PLATFORM_INFO_DIR}/CMakeFortranCompiler.cmake

Modules/CMakeFortranCompiler.cmake.in

@@ -25,7 +25,7 @@ set(CMAKE_Fortran_COMPILER_ENV_VAR "FC")
 set(CMAKE_Fortran_COMPILER_SUPPORTS_F90 @CMAKE_Fortran_COMPILER_SUPPORTS_F90@)
 
 set(CMAKE_Fortran_COMPILER_ID_RUN 1)
-set(CMAKE_Fortran_SOURCE_FILE_EXTENSIONS f;F;fpp;FPP;f77;F77;f90;F90;for;For;FOR;f95;F95)
+set(CMAKE_Fortran_SOURCE_FILE_EXTENSIONS f;F;fpp;FPP;f77;F77;f90;F90;for;For;FOR;f95;F95@CMAKE_Fortran_VENDOR_SOURCE_FILE_EXTENSIONS@)
 set(CMAKE_Fortran_IGNORE_EXTENSIONS h;H;o;O;obj;OBJ;def;DEF;rc;RC)
 set(CMAKE_Fortran_LINKER_PREFERENCE 20)
 if(UNIX)