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Fortran submodule support for NAG

The recently released NAG 7.0 compiler supports submodules for the first time. CMake doesn't understand the NAG convention for naming the compiled submodule files and so fails when it tries to copy the file into the CMakeFiles tree to a .stamp file.

For

submodule (foo) bar

the NAG compiler generates the module file foo.bar.sub and the Fortran names are folded to lower case in the file name.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information