At Deltares we use an old version of ESMF on Windows and I'm trying to build a recent version.

Using the MinGW build config works, but that is i686-based.

Copying some MinGW flags to the Cygwin build config gets me further, but there are some non-functional (ESMF_OS_MinGW instead of ESMF_NO_SIGNALS, for instance) code-switches that still make it fail.

I would like to request permission to create a feature-branch for correcting the Cygwin flags and making the code-switches functional.