Makefile.in: Update.

	* Makefile.in: Update.
	* c-common.c (flag_iso, flag_undef, cb_register_builtins,
	builtin_define_std): New.
	(c_common_init): Register CPP builtins callback.
	* c-common.h (flag_iso, flag_undef): New.
	* c-decl.c (c_decode_option): Set flag_iso and flag_undef.
	* c-lex.c: Don't include target.h.
	(cb_register_builtins): Move to c-common.c.
	(init_c_lex): Don't register hook here.
	* c-lex.h (builtin_define, builtin_assert, builtin_define_std): New.
	(cpp_define, cpp_assert): Remove.
	* gcc.c (cc1_options): Pass -undef to front end.
	* target-def.h (TARGET_REGISTER_CPP_BUILTINS): Remove.
	(TARGET_INITIALIZER): Update.
	* target.h (struct cpp_reader): Don't predeclare.
	(struct gcc_target): Remove cpp builtin hook.
	* tree.c (default_register_cpp_builtins): Remove.
cp:
	* cp-tree.h (flag_ansi): Remove.
	* decl2.c (flag_ansi): Remove.
	(cxx_decode_option): Set flag_iso and flag_undef.
doc:
	* tm.texi: Update.

From-SVN: r53349

1 files changed, 25 insertions, 12 deletions

diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi
index b70ae48..f382796 100644
--- a/gcc/doc/tm.texi
+++ b/gcc/doc/tm.texi
@@ -622,19 +622,32 @@ The macro @code{STANDARD_STARTFILE_PREFIX}.
 @c prevent bad page break with this line
 Here are run-time target specifications.
 
-@deftypefn {Target Hook} void TARGET_REGISTER_CPP_BUILTINS (cpp_reader *@var{pfile})
-This macro expands to a target-specific function, called by the C
-family of front ends, that allows you to define preprocessor built-in
-macros and assertions at run-time.
-
-Pass the argument (a preprocessor handle) as the first argument to the
-functions @code{cpp_define} and @code{cpp_assert}, declared in
-@file{c-lex.h}.  The second argument is the same as the argument to
-the respective command-line option, for example @code{__mips__} for
-@code{cpp_define}, and @code{cpu=mips} for @code{cpp_assert}.
-@end deftypefn
-
 @table @code
+@findex TARGET_REGISTER_CPP_BUILTINS
+@item TARGET_REGISTER_CPP_BUILTINS
+This macro expands to a block of code that defines target-specific
+built-in preprocessor macros and assertions, using the functions
+@code{builtin_macro}, @code{builtin_macro_std} and
+@code{builtin_assert} declared in @file{c-lex.h}.
+
+@code{builtin_assert} takes a string in the form you pass to the
+command-line option @option{-A}, such as @code{cpu=mips}, and creates
+the assertion.  @code{builtin_macro} takes a string in the form
+accepted by option @option{-D} and unconditionally defines the macro.
+
+@code{builtin_macro_std} takes a string representing the name of an
+object-like macro.  If it doesn't lie in the user's namespace,
+@code{builtin_macro_std} defines it unconditionally.  Otherwise, it
+defines a version with two leading underscores, and another version
+with two leading and trailing underscores, and defines the original
+only if an ISO standard was not requested on the command line.  For
+example, passing @code{unix} defines @code{__unix}, @code{__unix__}
+and possibly @code{unix}; passing @code{_mips} defines @code{__mips},
+@code{__mips__} and possibly @code{_mips}, and passing @code{_ABI64}
+defines only @code{_ABI64}.
+
+This macro obsoletes the @code{CPP_PREDEFINES} target macro.
+
 @findex CPP_PREDEFINES
 @item CPP_PREDEFINES
 Define this to be a string constant containing @option{-D} options to