https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117381
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|WAITING |NEW --- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- I'll note that f951: Fatal Error: Maximum supported identifier length is 63 which is a hard compiled-in limit that is used throughout the frontend for static allocation of names. gfortran.h:#define GFC_MAX_SYMBOL_LEN 63 /* Must be at least 63 for F2003. */ so it seems we use the minimum allowed implementation-defined limit (which is also the default, unless -std=f95).