https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118337
--- Comment #2 from kargls at comcast dot net --- (In reply to Thomas Koenig from comment #1) > Probably safest to bump the module version.... Agree with Thomas, here. The internally generated iso_c_binding module from 14 and 15 are different. If a module USEs iso_c_binding and is compiled by 14, then the resulting module will likely run into compatibility issues.