arameter ‘mpi_comm_null’ at (1) has not been declared or is a variable, which does not reduce to a constant expression

[TwoPhaseLinearStability]

Dear all,

I had a problem when compiling NGA2,

[linysh1997]

Hello. Have you resolved this problem? I have encountered the same problem when using GCC/8.3.0. Using GCC higher than 10.2.0 can fix this error, but new errors appeared in compiling example cases.