https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118337
--- Comment #13 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:21ee71afa72746367cab7847f950448f04607dd2 commit r15-6704-g21ee71afa72746367cab7847f950448f04607dd2 Author: Jakub Jelinek <ja...@redhat.com> Date: Wed Jan 8 20:07:47 2025 +0100 fortran: Bump MOD_VERSION to "16" [PR118337] As mentioned in the PR, there is a *.mod incompatibility between GCC 14 and GCC 15, at least when using iso_c_binding or iso_fortran_env intrinsic modules, because new entries have been added to those modules in the middle, causing changes in the constants emitted in the *.mod files. Also, I fear modules produced with GCC 15 with -funsigned and using UNSIGNED in the modules will be unreadable by GCC 14. The following patch just bumps MOD_VERSION for this. Note, a patch for accepting also MOD_VERSION "15" has been posted incrementally. 2025-01-08 Jakub Jelinek <ja...@redhat.com> PR fortran/118337 * module.cc (MOD_VERSION): Bump to "16".