diff -up tigervnc-1.4.2/unix/xserver/hw/vnc/Makefile.am.libvnc-os tigervnc-1.4.2/unix/xserver/hw/vnc/Makefile.am

--- tigervnc-1.4.2/unix/xserver/hw/vnc/Makefile.am.libvnc-os	2015-02-13 13:22:19.519322622 +0000

+++ tigervnc-1.4.2/unix/xserver/hw/vnc/Makefile.am	2015-02-13 13:22:19.521322636 +0000

@@ -5,6 +5,7 @@ RFB_LIB=$(LIB_DIR)/rfb/librfb.la

 RDR_LIB=$(LIB_DIR)/rdr/librdr.la

 NETWORK_LIB=$(LIB_DIR)/network/libnetwork.la

 XREGION_LIB=$(LIB_DIR)/Xregion/libXregion.la

+OS_LIB=$(LIB_DIR)/os/libos.la

 COMMON_LIBS=$(NETWORK_LIB) $(RFB_LIB) $(RDR_LIB) $(XREGION_LIB)

 # Hack to get the C headers to work when included from C++ code

@@ -58,7 +59,7 @@ libvnc_la_CPPFLAGS = $(XVNC_CPPFLAGS) -I

 libvnc_la_LDFLAGS = -module -avoid-version -Wl,-z,now

-libvnc_la_LIBADD = libvnccommon.la $(COMMON_LIBS)

+libvnc_la_LIBADD = libvnccommon.la $(COMMON_LIBS) $(OS_LIB)

 EXTRA_DIST = Xvnc.man