Kyle's updates for finding the wgrib2 library.

Fixes ufs-community#559

cmake/Findwgrib2.cmake

@@ -0,0 +1,23 @@
+# This module produces the target wgrib2::wgrib2
+
+find_path(WGRIB2_INCLUDES wgrib2api.mod)
+
+find_library(WGRIB2_LIBRARIES libwgrib2.a)
+
+find_program(WGRIB2_EXE wgrib2)
+execute_process(COMMAND ${WGRIB2_EXE} --version OUTPUT_VARIABLE version_str)
+string(SUBSTRING ${version_str} 3 5 version)
+
+mark_as_advanced(WGRIB2_INCLUDES WGRIB2_LIBRARIES)
+
+add_library(wgrib2::wgrib2 UNKNOWN IMPORTED)
+
+set_target_properties(wgrib2::wgrib2 PROPERTIES
+  IMPORTED_LOCATION "${WGRIB2_LIBRARIES}"
+  INTERFACE_INCLUDE_DIRECTORIES "${WGRIB2_INCLUDES}"
+  INTERFACE_LINK_LIBRARIES "${WGRIB2_LIBRARIES}")
+
+find_package_handle_standard_args(wgrib2
+  REQUIRED_VARS WGRIB2_LIBRARIES WGRIB2_INCLUDES WGRIB2_EXE
+  VERSION_VAR version
+)

sorc/chgres_cube.fd/CMakeLists.txt

@@ -49,8 +49,7 @@ target_link_libraries(
   sp::sp_d
   w3nco::w3nco_d
   esmf
-  wgrib2::wgrib2_lib
-  wgrib2::wgrib2_api
+  wgrib2::wgrib2
   MPI::MPI_Fortran
   NetCDF::NetCDF_Fortran)