Since the legacy header support for avoiding the availability attribute has been dropped from the 10.15 SDK...
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90835 and it is unclear when and if the missing availability attribute support will be added to FSF gcc, the path of least resistance might be to get a flang package into MacPorts to replace gfortran. Currently flang doesn't build on macOS... https://github.com/flang-compiler/flang/issues/678 https://github.com/flang-compiler/flang/issues/212 https://github.com/flang-compiler/flang/pull/592 As a side note, Ubuntu has added a flang package since their Disco release. Jack
