add nvhpc compiler flags to cmake

CMakeLists.txt

@@ -27,7 +27,7 @@ project(FMS
   DESCRIPTION  "GFDL FMS Library"
   HOMEPAGE_URL "https://www.gfdl.noaa.gov/fms"
   LANGUAGES C Fortran)
-
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 include(GNUInstallDirs)
 
 if(NOT CMAKE_BUILD_TYPE MATCHES "^(Debug|Release|RelWithDebInfo|MinSizeRel)$")
@@ -67,6 +67,11 @@ option(LARGEFILE             "Enable compiler definition -Duse_LARGEFILE"
 option(WITH_YAML             "Enable compiler definition -Duse_yaml"              OFF)
 option(USE_DEPRECATED_IO     "THIS OPTION HAS NO EFFECT AND WILL BE REMOVED IN A FUTURE RELEASE"   OFF)
 
+if(CMAKE_Fortran_COMPILER_ID MATCHES "NVHPC")
+# it seems nvidia does not support quad prec
+  set(ENABLE_QUAD_PRECISION OFF)
+endif()
+
 if(32BIT)
   list(APPEND kinds "r4")
 endif()
@@ -332,6 +337,7 @@ foreach(kind ${kinds})
                                                  mosaic2/include
                                                  constants
                                                  astronomy/include
+                                                 field_manager/
                                                  field_manager/include
                                                  time_interp/include
                                                  tracer_manager/include

cmake/compiler_flags_NVHPC_C.cmake

@@ -0,0 +1,6 @@
+# NVHPC C
+set(CMAKE_C_FLAGS_RELEASE "-O3")
+
+set(CMAKE_C_FLAGS_DEBUG "-O0 -g")
+
+set(CMAKE_C_LINK_FLAGS "")

cmake/compiler_flags_NVHPC_Fortran.cmake

@@ -0,0 +1,13 @@
+# Precision-based Fortran compiler flags
+set(r8_flags "-r8") # Fortran flags for 64BIT precision
+
+# NVHPC Fortan
+set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} ")
+
+set(CMAKE_Fortran_FLAGS_RELEASE "-O3 -fast")
+
+set(CMAKE_Fortran_FLAGS_DEBUG "-O0 -Ktrap=fp" )
+# -g can cause bugs, see: https://forums.developer.nvidia.com/t/bug-compiling-with-g-o0-produces-a-compute-sanitizer-error-removing-g-removes-the-error/341478 
+# not sure if this is only on GPUs
+
+set(CMAKE_Fortran_LINK_FLAGS "" )

cmake/fms_compiler_flags.cmake

@@ -8,6 +8,8 @@ elseif(CMAKE_Fortran_COMPILER_ID STREQUAL "Intel")
   include(compiler_flags_Intel_Fortran)
 elseif(CMAKE_Fortran_COMPILER_ID STREQUAL "IntelLLVM")
   include(compiler_flags_IntelLLVM_Fortran)
+elseif(CMAKE_Fortran_COMPILER_ID STREQUAL "NVHPC")
+  include(compiler_flags_NVHPC_Fortran)
 else()
   message(WARNING "Fortran compiler with ID ${CMAKE_Fortran_COMPILER_ID} will be used with CMake default options")
 endif()
@@ -24,6 +26,8 @@ elseif(CMAKE_C_COMPILER_ID STREQUAL "IntelLLVM")
   include(compiler_flags_IntelLLVM_C)
 elseif(CMAKE_C_COMPILER_ID MATCHES "Clang")
   include(compiler_flags_Clang_C)
+elseif(CMAKE_C_COMPILER_ID MATCHES "NVHPC")
+  include(compiler_flags_NVHPC_C)
 else()
   message(WARNING "C compiler with ID ${CMAKE_C_COMPILER_ID} will be used with CMake default options")
 endif()