Merge pull request #16 from NOAA-EMC/gcc-10-settable-flags

GCC 10 flags, compiler check, and settable flags

src/CMakeLists.txt

@@ -8,21 +8,30 @@ elseif(UNIX)
 endif()
 
 if(CMAKE_C_COMPILER_ID MATCHES "^(Intel)$")
-  set(CMAKE_C_FLAGS "-g")
+  set(CMAKE_C_FLAGS "-g ${CMAKE_C_FLAGS}")
   set(CMAKE_C_FLAGS_RELEASE "-O3")
-  set(CMAKE_Fortran_FLAGS "-g")
+elseif(CMAKE_C_COMPILER_ID MATCHES "^(GNU|Clang|AppleClang)$")
+  set(CMAKE_C_FLAGS "-ggdb ${CMAKE_C_FLAGS}")
+  set(CMAKE_C_FLAGS_RELEASE "-O3")
+endif()
+
+if(CMAKE_Fortran_COMPILER_ID MATCHES "^(Intel)$")
+  set(CMAKE_Fortran_FLAGS "-g ${CMAKE_Fortran_FLAGS}")
   set(CMAKE_Fortran_FLAGS_RELEASE "-O3")
   set(fortran_d_flags "-r8")
   set(fortran_8_flags "-i8 -r8")
-elseif(CMAKE_C_COMPILER_ID MATCHES "^(GNU|Clang|AppleClang)$")
-  set(CMAKE_C_FLAGS "-ggdb")
-  set(CMAKE_C_FLAGS_RELEASE "-O3")
-  set(CMAKE_Fortran_FLAGS "-ggdb -fno-range-check -fbacktrace -funroll-loops")
+elseif(CMAKE_Fortran_COMPILER_ID MATCHES "^(GNU)$")
+  set(CMAKE_Fortran_FLAGS "-ggdb -fno-range-check -fbacktrace -funroll-loops ${CMAKE_Fortran_FLAGS}")
   set(CMAKE_Fortran_FLAGS_RELEASE "-O3")
   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_source_files_properties(${c_src} PROPERTIES COMPILE_OPTIONS "${c_flags}")
 
 # One target for real32 and one target for real64