+XCB_CHECK_VISIBILITY()
+
+# htmldir is not defined prior to autoconf 2.59c, so on earlier versions
+# set an equivalent value.
+AC_PREREQ([2.59c], [], [AC_SUBST([htmldir], [m4_ifset([AC_PACKAGE_TARNAME],
+ ['${datadir}/doc/${PACKAGE_TARNAME}'],
+ ['${datadir}/doc/${PACKAGE}'])
+])])
+
+XCB_CHECK_DOXYGEN()
+
+AC_CHECK_FUNC(poll, [AC_DEFINE(USE_POLL, 1, [poll() function is available])], )
+
+XCB_EXTENSION(Composite, "yes")
+XCB_EXTENSION(Damage, "yes")
+XCB_EXTENSION(DPMS, "yes")
+XCB_EXTENSION(GLX, "yes")
+XCB_EXTENSION(RandR, "yes")
+XCB_EXTENSION(Record, "yes")
+XCB_EXTENSION(Render, "yes")
+XCB_EXTENSION(Resource, "yes")
+XCB_EXTENSION(Screensaver, "yes")
+XCB_EXTENSION(Shape, "yes")
+XCB_EXTENSION(Shm, "yes")
+XCB_EXTENSION(Sync, "yes")
+XCB_EXTENSION(Xevie, "yes")
+XCB_EXTENSION(XFixes, "yes")
+XCB_EXTENSION(XFree86-DRI, "yes")
+XCB_EXTENSION(Xinerama, "yes")
+XCB_EXTENSION(XInput, "no")
+XCB_EXTENSION(Xprint, "yes")
+XCB_EXTENSION(SELinux, "no")
+XCB_EXTENSION(XTest, "yes")
+XCB_EXTENSION(Xv, "yes")
+XCB_EXTENSION(XvMC, "yes")
+
+AC_ARG_WITH(launchd, AS_HELP_STRING([--with-launchd], [Build with support for Apple's launchd (default: auto)]), [LAUNCHD=$withval], [LAUNCHD=auto])
+if test "x$LAUNCHD" = xauto; then
+ unset LAUNCHD
+ AC_CHECK_PROG(LAUNCHD, [launchd], [yes], [no])
+fi