3 files changed, 24 insertions, 4 deletions
diff --git a/generic/tcl.decls b/generic/tcl.decls
index 28cee54..e618c9d 100644
--- a/generic/tcl.decls
+++ b/generic/tcl.decls
@@ -2108,6 +2108,11 @@ declare 578 {
 declare 579 {
     void Tcl_AppendPrintfToObj(Tcl_Obj *objPtr, const char *format, ...)
 }
+
+# Public in Tcl 8.6:
+declare 581 {
+    int TclCanceled(Tcl_Interp *interp, int flags)
+}
 declare 630 {
     void TclUnusedStubEntry(void)
 }
diff --git a/generic/tclDecls.h b/generic/tclDecls.h
index 20ec35d..7eb6714 100644
--- a/generic/tclDecls.h
+++ b/generic/tclDecls.h
@@ -3409,7 +3409,11 @@ EXTERN void		Tcl_AppendPrintfToObj(Tcl_Obj *objPtr,
 				CONST char *format, ...);
 #endif
 /* Slot 580 is reserved */
-/* Slot 581 is reserved */
+#ifndef TclCanceled_TCL_DECLARED
+#define TclCanceled_TCL_DECLARED
+/* 581 */
+EXTERN int		TclCanceled(Tcl_Interp *interp, int flags);
+#endif
 /* Slot 582 is reserved */
 /* Slot 583 is reserved */
 /* Slot 584 is reserved */
@@ -4079,7 +4083,7 @@ typedef struct TclStubs {
     Tcl_Obj * (*tcl_ObjPrintf) (CONST char *format, ...); /* 578 */
     void (*tcl_AppendPrintfToObj) (Tcl_Obj *objPtr, CONST char *format, ...); /* 579 */
     VOID *reserved580;
-    VOID *reserved581;
+    int (*tclCanceled) (Tcl_Interp *interp, int flags); /* 581 */
     VOID *reserved582;
     VOID *reserved583;
     VOID *reserved584;
@@ -6484,7 +6488,10 @@ extern TclStubs *tclStubsPtr;
 	(tclStubsPtr->tcl_AppendPrintfToObj) /* 579 */
 #endif
 /* Slot 580 is reserved */
-/* Slot 581 is reserved */
+#ifndef TclCanceled
+#define TclCanceled \
+	(tclStubsPtr->tclCanceled) /* 581 */
+#endif
 /* Slot 582 is reserved */
 /* Slot 583 is reserved */
 /* Slot 584 is reserved */
@@ -6542,6 +6549,7 @@ extern TclStubs *tclStubsPtr;
 
 /* !END!: Do not edit above this line. */
 
+#undef TclCanceled
 #undef TclUnusedStubEntry
 
 #undef TCL_STORAGE_CLASS
diff --git a/generic/tclStubInit.c b/generic/tclStubInit.c
index fd4a222..f8012c2 100644
--- a/generic/tclStubInit.c
+++ b/generic/tclStubInit.c
@@ -76,6 +76,13 @@ MODULE_SCOPE TclPlatStubs tclPlatStubs;
 MODULE_SCOPE TclStubs tclStubs;
 MODULE_SCOPE TclTomMathStubs tclTomMathStubs;
 
+#define TclCanceled canceled
+static int TclCanceled(interp)
+    Tcl_Interp *interp;
+{
+    return TCL_OK;
+}
+
 #if defined(_WIN32) || defined(__CYGWIN__)
 #undef TclWinNToHS
 unsigned short TclWinNToHS(unsigned short ns) {
@@ -1256,7 +1263,7 @@ TclStubs tclStubs = {
     Tcl_ObjPrintf, /* 578 */
     Tcl_AppendPrintfToObj, /* 579 */
     NULL, /* 580 */
-    NULL, /* 581 */
+    TclCanceled, /* 581 */
     NULL, /* 582 */
     NULL, /* 583 */
     NULL, /* 584 */