A step towards removing MODTK_VERSION from SUBST_VARS.The gui works fine with Tk 8.6. The patch is also a little nicer.$ x11vnc -gui
Unrelated to Tk, I have to use '-noshm' or else x11vnc dies with a SIGABRT and doesn't clean up properly. The list output by ipcs(1) will continue to grow. If x11vnc is run repeatedly then it will eventually die with "no space left on device". Seems to happen when calling XShmGetImage(3).

Stu

Index: Makefile===================================================================
RCS file: /cvs/ports/x11/x11vnc/Makefile,v
diff -u -p -u -p -r1.58 Makefile
--- Makefile	21 May 2025 13:27:22 -0000	1.58
+++ Makefile	20 Nov 2025 15:22:49 -0000
@@ -4,6 +4,8 @@ GH_ACCOUNT =		LibVNC
 GH_PROJECT =		x11vnc
 GH_TAGNAME =		0.9.17
 
+REVISION =		0
+
 CATEGORIES =		x11
 
 # GPLv2
@@ -14,6 +16,8 @@ WANTLIB += Xrandr Xtst avahi-client avah
 WANTLIB += ssl vncclient vncserver
 
 MODULES =		x11/tk
+MODTK_VERSION =		8.6
+
 RUN_DEPENDS =		devel/desktop-file-utils \
 			${MODTK_RUN_DEPENDS}
 LIB_DEPENDS =		graphics/cairo \
@@ -30,6 +34,10 @@ CONFIGURE_ENV +=	ac_cv_header_linux_inpu
 
 AUTOCONF_VERSION =	2.69
 AUTOMAKE_VERSION =	1.15
+
+SUBST_VARS =		WISH_BIN
+
+WISH_BIN =		${MODTK_BIN:T}
 
 pre-configure:
 	${SUBST_CMD} ${WRKSRC}/src/gui.c
Index: patches/patch-src_gui_c
===================================================================
RCS file: /cvs/ports/x11/x11vnc/patches/patch-src_gui_c,v
diff -u -p -u -p -r1.2 patch-src_gui_c
--- patches/patch-src_gui_c	11 Mar 2022 20:17:40 -0000	1.2
+++ patches/patch-src_gui_c	20 Nov 2025 15:22:49 -0000
@@ -8,7 +8,7 @@
 -	    ":/usr/X11R6/bin:/usr/openwin/bin:/usr/dt/bin:/opt/sfw/bin";
 -static char *wishes[] = {"wish8.4", "wish", "wish8.3", "wish8.5", "wish8.6", "wish8.7", "wishx", "wish8.0", NULL};
 +static char *extra_path = ":${PREFIX}/bin:${LOCALBASE}/bin:${X11BASE}/bin";
-+static char *wishes[] = {"wish${MODTK_VERSION}", NULL};
++static char *wishes[] = {"${WISH_BIN}", NULL};
  
  static void run_gui(char *gui_xdisplay, int connect_to_x11vnc, int start_x11vnc,
      int simple_gui, pid_t parent, char *gui_opts) {