CMake/Modules/Compiler/GNU-Fortran.cmake
Brad King 39ebfc79e6 Ninja: Add explicit preprocessing step for Fortran
All Fortran sources need to be preprocessed before any source may be
compiled so that module dependencies can be (later) extracted.  Factor
out an explicit preprocessing step preceding compilation.  Use Ninja
depfile dependencies on the preprocessing step and then compile the
already-preprocessed source with a separate build statement that depends
explicitly only on the preprocessor output.  Later we will insert
dynamic discovery of module dependencies between these steps.
2016-09-22 13:53:09 -04:00

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CMake

include(Compiler/GNU)
__compiler_gnu(Fortran)
set(CMAKE_Fortran_PREPROCESS_SOURCE
"<CMAKE_Fortran_COMPILER> -cpp <DEFINES> <INCLUDES> <FLAGS> -E <SOURCE> -o <PREPROCESSED_SOURCE>")
set(CMAKE_Fortran_FORMAT_FIXED_FLAG "-ffixed-form")
set(CMAKE_Fortran_FORMAT_FREE_FLAG "-ffree-form")
# No -DNDEBUG for Fortran.
string(APPEND CMAKE_Fortran_FLAGS_MINSIZEREL_INIT " -Os")
string(APPEND CMAKE_Fortran_FLAGS_RELEASE_INIT " -O3")
# No -isystem for Fortran because it will not find .mod files.
unset(CMAKE_INCLUDE_SYSTEM_FLAG_Fortran)
# Fortran-specific feature flags.
set(CMAKE_Fortran_MODDIR_FLAG -J)