decl2.c (cxx_decode_option): Support -fno-builtin-foo.

	* cp/decl2.c (cxx_decode_option): Support -fno-builtin-foo.

	* doc/invoke.texi: Document that both -fno-builtin-foo and
	-fno-builtin are supported by the g++ front-end.

From-SVN: r55802

gcc/ChangeLog

+2002-07-27  Roger Sayle  <roger@eyesopen.com>
+
+	* doc/invoke.texi: Document that both -fno-builtin-foo and
+	-fno-builtin are supported by the g++ front-end.
+
 2002-07-27  Stan Shebs  <shebs@apple.com>
 
 	* configure.in: Rename config_gtfiles to target_gtfiles.

gcc/cp/ChangeLog

+2002-07-27  Roger Sayle  <roger@eyesopen.com>
+
+	* decl2.c (cxx_decode_option): Support -fno-builtin-foo.
+
 2002-07-26  Jason Merrill  <jason@redhat.com>
 
 	* call.c (build_over_call): Likewise.

gcc/cp/decl2.c

@@ -534,6 +534,8 @@ cxx_decode_option (argc, argv)
 	  warning ("-fname-mangling-version is no longer supported");
 	  return 1;
 	}
+      else if ((option_value = skip_leading_substring (p, "no-builtin-")))
+	disable_builtin_function (option_value);
       else if (dump_switch_p (p))
 	;
       else 

gcc/doc/invoke.texi

@@ -1081,7 +1081,7 @@ switch only affects the @code{asm} and @code{typeof} keywords, since
 @code{inline} is a standard keyword in ISO C99.
 
 @item -fno-builtin
-@itemx -fno-builtin-@var{function} @r{(C and Objective-C only)}
+@itemx -fno-builtin-@var{function}
 @opindex fno-builtin
 @cindex built-in functions
 Don't recognize built-in functions that do not begin with
@@ -1099,15 +1099,8 @@ and faster, but since the function calls no longer appear as such, you
 cannot set a breakpoint on those calls, nor can you change the behavior
 of the functions by linking with a different library.
 
-In C++, @option{-fno-builtin} is always in effect.  The @option{-fbuiltin}
-option has no effect.  Therefore, in C++, the only way to get the
-optimization benefits of built-in functions is to call the function
-using the @samp{__builtin_} prefix.  The GNU C++ Standard Library uses
-built-in functions to implement many functions (like
-@code{std::strchr}), so that you automatically get efficient code.
-
-With the @option{-fno-builtin-@var{function}} option, not available
-when compiling C++, only the built-in function @var{function} is
+With the @option{-fno-builtin-@var{function}} option
+only the built-in function @var{function} is
 disabled.  @var{function} must not begin with @samp{__builtin_}.  If a
 function is named this is not built-in in this version of GCC, this
 option is ignored.  There is no corresponding