cmake: require XCB libs and not just X11-XCB

cmake/FindXCB.cmake

@@ -0,0 +1,53 @@
+#.rst:
+# FindXCB
+# -------
+#
+# Find XCB libraries
+#
+# Tries to find xcb libraries on unix systems.
+#
+# - Be sure to set the COMPONENTS to the components you want to link to
+# - The XCB_LIBRARIES variable is set ONLY to your COMPONENTS list
+# - To use only a specific component check the XCB_LIBRARIES_${COMPONENT} variable
+#
+# The following values are defined
+#
+# ::
+#
+#   XCB_FOUND         - True if xcb is available
+#   XCB_INCLUDE_DIRS  - Include directories for xcb
+#   XCB_LIBRARIES     - List of libraries for xcb
+#   XCB_DEFINITIONS   - List of definitions for xcb
+#
+#=============================================================================
+# Copyright (c) 2015 Jari Vetoniemi
+#
+# Distributed under the OSI-approved BSD License (the "License");
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+
+include(FeatureSummary)
+set_package_properties(XCB PROPERTIES
+   URL "http://xcb.freedesktop.org/"
+   DESCRIPTION "X protocol C-language Binding")
+
+find_package(PkgConfig)
+pkg_check_modules(PC_XCB QUIET xcb ${XCB_FIND_COMPONENTS})
+
+find_library(XCB_LIBRARIES xcb HINTS ${PC_XCB_LIBRARY_DIRS})
+find_path(XCB_INCLUDE_DIRS xcb/xcb.h PATH_SUFFIXES xcb HINTS ${PC_XCB_INCLUDE_DIRS})
+
+foreach(COMPONENT ${XCB_FIND_COMPONENTS})
+	find_library(XCB_LIBRARIES_${COMPONENT} ${COMPONENT} HINTS ${PC_XCB_LIBRARY_DIRS})
+	list(APPEND XCB_LIBRARIES ${XCB_LIBRARIES_${COMPONENT}})
+	mark_as_advanced(XCB_LIBRARIES_${COMPONENT})
+endforeach(COMPONENT ${XCB_FIND_COMPONENTS})
+
+set(XCB_DEFINITIONS ${PC_XCB_CFLAGS_OTHER})
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(XCB DEFAULT_MSG XCB_LIBRARIES XCB_INCLUDE_DIRS)
+mark_as_advanced(XCB_INCLUDE_DIRS XCB_LIBRARIES XCB_DEFINITIONS)

cmake/SearchForStuff.cmake

@@ -139,6 +139,7 @@ if(UNIX)
         check_lib(GTK3 gtk+-3.0 gtk/gtk.h)
     endif()
     endif()
+    find_package(XCB)
 endif()
 
 #----------------------------------------

pcsx2/CMakeLists.txt

@@ -1218,6 +1218,7 @@ if(Linux)
 		${LIBUDEV_LIBRARIES}
 		${X11_LIBRARIES}
 		${X11_XCB_LIBRARIES}
+		${XCB_LIBRARIES}
 		)
 endif()