Merge 8.6

Author: jan.nijtmans

generic/tk.h

@@ -1555,7 +1555,7 @@ typedef Tcl_Size (Tk_SelectionProc) (void *clientData, Tcl_Size offset,
  *----------------------------------------------------------------------
  */
 
-#include "tkDecls.h"
+#include "tkDecls.h"  /* IWYU pragma: export */
 
 #undef TCL_STORAGE_CLASS
 #define TCL_STORAGE_CLASS DLLIMPORT

generic/tkInt.h

@@ -33,7 +33,9 @@
 #endif
 #include <stdint.h>
 #include <stdlib.h>
+#if defined(_MSC_VER) || (defined(__STDC_VERSION__) && (__STDC_VERSION__ < 202311L))
 #include <stdbool.h>
+#endif
 #ifdef BYTE_ORDER
 #    ifdef BIG_ENDIAN
 #	 if BYTE_ORDER == BIG_ENDIAN