https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104471
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- This patch should fix the issue (I might get to it in a few weeks though): diff --git a/libcpp/files.cc b/libcpp/files.cc index a18b1caf48d..eb90fa4f65a 100644 --- a/libcpp/files.cc +++ b/libcpp/files.cc @@ -177,7 +177,7 @@ static bool read_file_guts (cpp_reader *pfile, _cpp_file *file, static bool read_file (cpp_reader *pfile, _cpp_file *file, location_t loc); static struct cpp_dir *search_path_head (cpp_reader *, const char *fname, - int angle_brackets, enum include_type); + int angle_brackets, enum include_type, bool = true); static const char *dir_name_of_file (_cpp_file *file); static void open_file_failed (cpp_reader *pfile, _cpp_file *file, int, location_t); @@ -1026,7 +1026,7 @@ _cpp_mark_file_once_only (cpp_reader *pfile, _cpp_file *file) nothing left in the path, returns NULL. */ static struct cpp_dir * search_path_head (cpp_reader *pfile, const char *fname, int angle_brackets, - enum include_type type) + enum include_type type, bool canerror) { cpp_dir *dir; _cpp_file *file; @@ -1055,7 +1055,7 @@ search_path_head (cpp_reader *pfile, const char *fname, int angle_brackets, return make_cpp_dir (pfile, dir_name_of_file (file), pfile->buffer ? pfile->buffer->sysp : 0); - if (dir == NULL) + if (canerror && dir == NULL) cpp_error (pfile, CPP_DL_ERROR, "no include path in which to search for %s", fname); @@ -2144,7 +2144,9 @@ bool _cpp_has_header (cpp_reader *pfile, const char *fname, int angle_brackets, enum include_type type) { - cpp_dir *start_dir = search_path_head (pfile, fname, angle_brackets, type); + cpp_dir *start_dir = search_path_head (pfile, fname, angle_brackets, type, false); + if (!start_dir) + return false; _cpp_file *file = _cpp_find_file (pfile, fname, start_dir, angle_brackets, _cpp_FFK_HAS_INCLUDE, 0); return file->err_no != ENOENT;