Update CMakeLists.txt to fix #237 Add fatal error to cmakelists if de…

…bug + gpu is enabled with NVHPC <= 22.11 (#238)

CMakeLists.txt

@@ -65,7 +65,17 @@ if (CMAKE_Fortran_COMPILER_ID STREQUAL "GNU")
     endif()
 elseif ((CMAKE_Fortran_COMPILER_ID STREQUAL "NVHPC") OR (CMAKE_Fortran_COMPILER_ID STREQUAL "PGI"))
     if (CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 21.7)
-        message(FATAL_ERROR "${__err_msg}ERROR: NVHPC v21.7 or newer is required to build MFC.")
+        message(FATAL_ERROR "${__err_msg}ERROR: When using NVHPC, v21.7 or newer is required to build MFC.")
+    endif()
+    if (MAKE_BUILD_TYPE STREQUAL "Debug")
+        if (MFC_OpenACC)
+            if (CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 23.0)
+                message(FATAL_ERROR "${__err_msg}ERROR: When using NVHPC, v23.0 or newer is required to build MFC with Debug and GPU options.")
+            endif()
+        else()
+            if (CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 23.8)
+                message(FATAL_ERROR "${__err_msg}ERROR: Debug is not working with NVHPC 23.X and older and CPU options at present.")
+            endif()
     endif()
 elseif (CMAKE_Fortran_COMPILER_ID STREQUAL "AppleClang" OR CMAKE_C_COMPILER_ID STREQUAL "AppleClang")
     message(FATAL_ERROR "${__err_msg}ERROR: MFC does not support the Apple Clang compilers. Please consult the documentation.")
@@ -145,7 +155,7 @@ elseif ((CMAKE_Fortran_COMPILER_ID STREQUAL "NVHPC") OR (CMAKE_Fortran_COMPILER_
     endif()
 
     if (CMAKE_BUILD_TYPE STREQUAL "Debug")
-        add_compile_options(-C -g -traceback -Mchkptr -Mchkstk -Minform=inform -Mbounds)
+        add_compile_options(-C -g -O0 -traceback -Mchkptr -Mchkstk -Minform=inform -Mbounds)
     endif()
 endif()