system.h (bool, [...]): Don't redefine as preprocessor macros in C++.

	* system.h (bool, true, false): Don't redefine as preprocessor macros
	in C++.

From-SVN: r85135

gcc/ChangeLog

+2004-07-25  Bernardo Innocenti  <bernie@develer.com>
+
+	* system.h (bool, true, false): Don't redefine as preprocessor macros
+	in C++.
+
 2004-07-24  Roger Sayle  <roger@eyesopen.com>
 
 	* expmed.c (init_expmed): A signed modulus by a power of two is

gcc/system.h

@@ -505,18 +505,28 @@ extern int snprintf (char *, size_t, const char *, ...);
    and even if it is, it is liable to be buggy.  
    This must be after all inclusion of system headers, as some of
    them will mess us up.  */
-#undef bool
-#undef true
-#undef false
+
 #undef TRUE
 #undef FALSE
 
-#define bool unsigned char
-#define true 1
-#define false 0
+#ifdef __cplusplus
+  /* Obsolete.  */
+# define TRUE true
+# define FALSE false
+#else /* !__cplusplus */
+# undef bool
+# undef true
+# undef false
+
+# define bool unsigned char
+# define true 1
+# define false 0
+
+  /* Obsolete.  */
+# define TRUE true
+# define FALSE false
+#endif /* !__cplusplus */
 
-#define TRUE true
-#define FALSE false
 
 /* Some compilers do not allow the use of unsigned char in bitfields.  */
 #define BOOL_BITFIELD unsigned int