WIP: Changes needed for NAG Compiler #240
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mathomp4
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Contingent - DNA
rtodling
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Sep 22, 2023
Yeah. I need to revisit this. Files got moved long ago... I'll put it on the list! |
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This PR tracks changes needed to compile GMAO_Shared with the NAG Compiler. NAG is very strict and will not allow the use of Fortran extensions that are endemic to GEOS.
The first category are procedures that are now part of the Fortran Standard that used to be extensions in some compilers:
iargc()→command_argument_count()getarg()→get_command_argument()getenv()→get_environment_variable()system()→execute_command_line()call exit(0)→stopcall exit(N)→error stop NNAG also doesn't support (without flags that need to be used everywhere as @tclune can elucidate on) the use of
real*4orreal(kind=4). The reason is that NAG does not use 4 for 32-bit real and 8 for 64-bit, instead they use 1 and 2. (The Standard does not specify what "kind" a 32-bit real must be, only that there must be one.) So, many changes are of the type:real*4→real(REAL32)real(kind=8)→real(kind=REAL64)