Index: lib/util/include/bool.h
===================================================================
Don't define boolean macros for C23 standard as they are implemented
as keywords.

Upstream: https://sourceforge.net/p/xmlrpc-c/code/3318/

Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>

diff --git a/lib/util/include/bool.h b/lib/util/include/bool.h
--- a/lib/util/include/bool.h	(revision 3316)
+++ b/lib/util/include/bool.h	(working copy)
@@ -5,7 +5,11 @@
    collision.
 */
 
-#ifndef __cplusplus
+#ifdef __cplusplus
+/* bool has always been part of the C++ language */
+#elif __STDC_VERSION__ >= 202311L
+/* bool is part of the C23 standard */
+#else
 /* At least the GNU compiler defines __bool_true_false_are_defined */
 #ifndef __bool_true_false_are_defined
 #define __bool_true_false_are_defined