c-common.h (enum c_tree_index): Add CTI_SIGNED_SIZE_TYPE and CTI_UNSIGNED_PTRDIFF_TYPE.
* c-common.h (enum c_tree_index): Add CTI_SIGNED_SIZE_TYPE and
CTI_UNSIGNED_PTRDIFF_TYPE.
(signed_size_type_node): Define.
(unsigned_ptrdiff_type_node): Define.
* c-decl.c (init_decl_processing): Create the
signed_size_type_node and unsigned_ptrdiff_type_node types.
* c-common.c (T_SC): Define.
(T_SST): Define.
(T_UPD): Define.
(print_char_table): Use T_SST for %zd, %zi, %zn. Use T_UPD for
%to, %tu, %tx, %tX. Allow %hhn (T_SC). Add "c" to the flags for
%s and %p.
(scan_char_table): Use T_SC for %hhd, %hhi, %hhn. Use T_SST for
%zd, %zi, %zn. Use T_UPD for %to, %tu, %tx, %tX. Add "c" to the
flags for %c, %s and %[.
(check_format_info): Only allow leniency for signedness of targets
of character pointers (when pedantic) for formats flagged with
"c", so for strings but not for %hh formats. When pedantic, don't
allow character pointers to substitute for void pointers if a
second level of indirection is present.