sync code with last improvements from OpenBSD

lib/xcb-util-cursor/m4/xcb_util_common.m4

@@ -0,0 +1,44 @@
+# XCB_UTIL_COMMON(xcb-required-version, xcb-proto-required-version)
+# -----------------------------------------------------------------
+#
+# Defines default options for xcb-util libraries.  xorg/util/macros >=
+# 1.16.0 is  required for  cross-platform compiler  flags and  to build
+# library documentation.
+#
+AC_DEFUN([XCB_UTIL_COMMON], [
+m4_ifndef([AX_COMPARE_VERSION],
+          [m4_fatal([could not find AX_COMPARE_VERSION in macros search path])])
+
+AC_REQUIRE([LT_INIT])
+
+# Define header files and pkgconfig paths
+xcbincludedir='${includedir}/xcb'
+AC_SUBST(xcbincludedir)
+pkgconfigdir='${libdir}/pkgconfig'
+AC_SUBST(pkgconfigdir)
+
+# Check xcb version
+PKG_CHECK_MODULES(XCB, xcb >= [$1])
+
+# Check version of xcb-proto that xcb was compiled against
+xcbproto_required=[$2]
+
+AC_MSG_CHECKING([whether libxcb was compiled against xcb-proto >= $xcbproto_required])
+xcbproto_version=`$PKG_CONFIG --variable=xcbproto_version xcb`
+AX_COMPARE_VERSION([$xcbproto_version],[ge],[$xcbproto_required], xcbproto_ok="yes",
+                   xcbproto_ok="no")
+AC_MSG_RESULT([$xcbproto_ok])
+
+if test $xcbproto_ok = no; then
+   AC_MSG_ERROR([libxcb was compiled against xcb-proto $xcbproto_version; it needs to be compiled against version $xcbproto_required or higher])
+fi
+
+# Call macros from Xorg util-macros
+m4_ifndef([XORG_MACROS_VERSION],
+          [m4_fatal([must install xorg-macros 1.16.0 or later before running autoconf/autogen])])
+
+XORG_MACROS_VERSION([1.16.0])
+XORG_DEFAULT_OPTIONS
+XORG_ENABLE_DEVEL_DOCS
+XORG_WITH_DOXYGEN
+]) # XCB_UTIL_COMMON