https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104006
--- Comment #23 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Ah, I finally understand. gfortran.ver-sun is now (newly) in BUILT_SOURCES through $(version_dep). And it depends on all the sources being built: $(libgfortran_la_OBJECTS) $(libgfortran_la_LIBADD)