Inventories for glibc2.22.

Compilers tested: gcc 4.8, 5, 6; clang 3.[5678].
errors.ini updated for deprecation and removal of regexp.h.

config/compilers.ini

@@ -152,7 +152,7 @@
 [DEFAULT]
 # These are good for any Unixy compiler (with exceptions as noted below)
 define      = -D
-preproc     = -E -o $.i
+preproc     = -E -P -o $.i
 compile     = -S -o $.s
 preproc_out = $.i
 compile_out = $.s

config/errors.ini

@@ -237,6 +237,20 @@ desc =
   The embedded code in this header contains an erroneous use of
   ``RETURN()`` instead of ``ERROR()``.
 
+[regexp_deprecated]
+header = regexp.h
+regexp = \#warning\b .*? \bregexp\.h\b
+desc =
+  This obsolete header generates an unconditional ``#warning``
+  telling the programmer to use :file:`regex.h` instead.
+
+[regexp_unimpl]
+header = regexp.h
+regexp = \#error\b .* \bregexp\.h\b
+desc =
+  This header is unimplemented: it contains only an ``#error`` directive
+  telling the programmer to use :file:`regex.h` instead.
+
 [regex_static_or_type_qualifiers]
 header = regex.h
 regexp = static\ or\ type\ qualifiers\ in\ abstract\ declarator