Merge pull request #8 from NOAA-EMC/gcc-10-settable-flags

GCC 10 and settable flags

src/CMakeLists.txt

@@ -1,16 +1,20 @@
 include("list_of_files.cmake")
 
 if(CMAKE_Fortran_COMPILER_ID MATCHES "^(Intel)$")
-  set(CMAKE_Fortran_FLAGS "-g -auto -convert big_endian -assume byterecl -fp-model strict -fpp")
+  set(CMAKE_Fortran_FLAGS "-g -auto -convert big_endian -assume byterecl -fp-model strict -fpp ${CMAKE_Fortran_FLAGS}")
   set(fortran_d_flags "-r8")
   set(fortran_8_flags "-i8 -r8")
 elseif(CMAKE_Fortran_COMPILER_ID MATCHES "^(GNU)$")
-  set(CMAKE_Fortran_FLAGS "-g -fconvert=big-endian -cpp")
+  set(CMAKE_Fortran_FLAGS "-g -fconvert=big-endian -cpp ${CMAKE_Fortran_FLAGS}")
   set(CMAKE_Fortran_FLAGS_DEBUG "-ggdb -Wall")
   set(fortran_d_flags "-fdefault-real-8")
   set(fortran_8_flags "-fdefault-integer-8 -fdefault-real-8")
 endif()
 
+if(${CMAKE_Fortran_COMPILER_ID} MATCHES "^(GNU)$" AND ${CMAKE_Fortran_COMPILER_VERSION} VERSION_GREATER_EQUAL 10)
+  set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -w -fallow-argument-mismatch -fallow-invalid-boz")
+endif()
+
 set(kinds "4" "8" "d")
 foreach(kind ${kinds})
   set(lib_name ${PROJECT_NAME}_${kind})