[Bug fortran/88912] Fortran compiler segfaults when pre-include file is not found

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88912

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
#define TARGET_F951_OPTIONS "%{!nostdinc:\
  %:fortran-preinclude-file(-fpre-include= math-vector-fortran.h finclude%s/)}"
in config/gnu-user.h adds that if the file is found.