Traditional cpp (used by fortran) didn;t know about the new
__has_include__ implementation. Hey, since when did traditional cpp
grow __has_include__? That wasn't in knr!
libcpp/
* init.c (builtin_array): Add xref comment.
* traditional.c (fun_like_macro): Add HAS_INCLUDE codes.
gcc/testsuite/
* c-c++-common/cpp/has-include-1-traditional.c: New.