diff -Naur xorg-server-1.20.0.orig/configure.ac xorg-server-1.20.0/configure.ac
--- xorg-server-1.20.0.orig/configure.ac	2018-05-10 18:32:34.000000000 +0200
+++ xorg-server-1.20.0/configure.ac	2018-05-15 09:29:33.770640000 +0200
@@ -74,6 +74,7 @@
 AC_CONFIG_HEADERS(include/version-config.h)
 
 AM_PROG_AS
+AC_PROG_CXX
 AC_PROG_LN_S
 LT_PREREQ([2.2])
 LT_INIT([disable-static win32-dll])
@@ -1777,6 +1778,10 @@
 	AC_SUBST([XVFB_SYS_LIBS])
 fi
 
+dnl Xvnc DDX
+AC_SUBST([XVNC_CPPFLAGS], ["-DHAVE_DIX_CONFIG_H $XSERVER_CFLAGS"])
+AC_SUBST([XVNC_LIBS], ["$FB_LIB $FIXES_LIB $XEXT_LIB $CONFIG_LIB $DBE_LIB $RECORD_LIB $GLX_LIBS $RANDR_LIB $RENDER_LIB $DAMAGE_LIB $DRI3_LIB $PRESENT_LIB $MIEXT_SYNC_LIB $MIEXT_DAMAGE_LIB $MIEXT_SHADOW_LIB $XI_LIB $XKB_LIB $XKB_STUB_LIB $COMPOSITE_LIB $MAIN_LIB"])
+AC_SUBST([XVNC_SYS_LIBS], ["$GLX_SYS_LIBS"])
 
 dnl Xnest DDX
 
@@ -1812,6 +1817,8 @@
 fi
 AC_MSG_RESULT([$XORG])
 
+AC_DEFINE_UNQUOTED(XORG_VERSION_CURRENT, [$VENDOR_RELEASE], [Current Xorg version])
+
 if test "x$XORG" = xyes; then
 	XORG_DDXINCS='-I$(top_srcdir)/hw/xfree86 -I$(top_srcdir)/hw/xfree86/include -I$(top_srcdir)/hw/xfree86/common'
 	XORG_OSINCS='-I$(top_srcdir)/hw/xfree86/os-support -I$(top_srcdir)/hw/xfree86/os-support/bus -I$(top_srcdir)/os'
@@ -2029,7 +2036,6 @@
 	AC_DEFINE(XORG_SERVER, 1, [Building Xorg server])
 	AC_DEFINE(XORGSERVER, 1, [Building Xorg server])
 	AC_DEFINE(XFree86Server, 1, [Building XFree86 server])
-	AC_DEFINE_UNQUOTED(XORG_VERSION_CURRENT, [$VENDOR_RELEASE], [Current Xorg version])
 	AC_DEFINE(NEED_XF86_TYPES, 1, [Need XFree86 typedefs])
 	AC_DEFINE(NEED_XF86_PROTOTYPES, 1, [Need XFree86 helper functions])
 	AC_DEFINE(__XSERVERNAME__, "Xorg", [Name of X server])
@@ -2565,6 +2571,7 @@
 hw/dmx/man/Makefile
 hw/vfb/Makefile
 hw/vfb/man/Makefile
+hw/vnc/Makefile
 hw/xnest/Makefile
 hw/xnest/man/Makefile
 hw/xwin/Makefile
diff -Naur xorg-server-1.20.0.orig/hw/Makefile.am xorg-server-1.20.0/hw/Makefile.am
--- xorg-server-1.20.0.orig/hw/Makefile.am	2018-05-10 18:32:34.000000000 +0200
+++ xorg-server-1.20.0/hw/Makefile.am	2018-05-15 09:27:21.684640000 +0200
@@ -38,7 +38,8 @@
 	$(DMX_SUBDIRS)		\
 	$(KDRIVE_SUBDIRS)	\
 	$(XQUARTZ_SUBDIRS)	\
-	$(XWAYLAND_SUBDIRS)
+	$(XWAYLAND_SUBDIRS)	\
+	vnc
 
 DIST_SUBDIRS = dmx xfree86 vfb xnest xwin xquartz kdrive xwayland
 
diff -Naur xorg-server-1.20.0.orig/include/os.h xorg-server-1.20.0/include/os.h
--- xorg-server-1.20.0.orig/include/os.h	2018-05-10 18:32:36.000000000 +0200
+++ xorg-server-1.20.0/include/os.h	2018-05-15 09:27:21.685640000 +0200
@@ -633,7 +633,7 @@
 extern _X_EXPORT void
 LogClose(enum ExitCode error);
 extern _X_EXPORT Bool
-LogSetParameter(LogParameter param, int value);
+LogSetParameter(enum _LogParameter param, int value);
 extern _X_EXPORT void
 LogVWrite(int verb, const char *f, va_list args)
 _X_ATTRIBUTE_PRINTF(2, 0);
diff -Naur xorg-server-1.20.0.orig/mi/miinitext.c xorg-server-1.20.0/mi/miinitext.c
--- xorg-server-1.20.0.orig/mi/miinitext.c	2018-05-10 18:32:37.000000000 +0200
+++ xorg-server-1.20.0/mi/miinitext.c	2018-05-15 09:30:23.087640000 +0200
@@ -107,8 +107,15 @@
 #include "os.h"
 #include "globals.h"
 
+#ifdef TIGERVNC
+extern void vncExtensionInit(INITARGS);
+#endif
+
 /* List of built-in (statically linked) extensions */
 static const ExtensionModule staticExtensions[] = {
+#ifdef TIGERVNC
+    {vncExtensionInit, "VNC-EXTENSION", NULL},
+#endif
     {GEExtensionInit, "Generic Event Extension", &noGEExtension},
     {ShapeExtensionInit, "SHAPE", NULL},
 #ifdef MITSHM