@@ -113,5 +113,67 @@
                         SHOBJLDFLAGS='-shared -Wl,--enable-auto-image-base -Wl,--output-def,$[@].def,--out-implib,$[@].a'
                         ;;
 	esac
 ])
 
+
+AC_DEFUN(DC_ASK_OPTLIB, [
+  AC_ARG_WITH($5, [  --with-$5 $4], [
+# Specified
+    LIBSPEC=$withval
+  ], [
+# Not specified
+    LIBSPECFLAGS=`pkg-config --libs $5 2>/dev/null`
+    LIBSPECCFLAGS=`pkg-config --cflags $5 2>/dev/null`
+    AC_CHECK_LIB($1, $2, [
+      OLDCPPFLAGS="$CPPFLAGS"
+      OLDCFLAGS="$CFLAGS"
+      CPPFLAGS="$CPPFLAGS $LIBSPECCFLAGS"
+      CFLAGS="$CFLAGS $LIBSPECCFLAGS"
+      AC_CHECK_HEADER($3, [
+        LIBSPEC=yes
+      ], [
+        LIBSPEC=no
+      ])
+      CPPFLAGS="$OLDCPPFLAGS"
+      CFLAGS="$OLDCFLAGS"
+    ], [
+      LIBSPEC=no
+      AC_MSG_WARN(Didn't find $5)
+    ], $LIBSPECFLAGS)
+  ])
+  case $LIBSPEC in
+  	no)
+  		AC_MSG_WARN(Support for $5 disabled)
+  		;;
+  	*)
+  		if test "${LIBSPEC}" = "yes"; then
+			true
+		else
+			LIBSPECFLAGS="-L${LIBSPEC}/lib ${LIBSPECFLAGS}"
+			LIBSPECCFLAGS="-I${LIBSPEC}/include ${LIBSPECCFLAGS}"
+  		fi
+		AC_CHECK_LIB($1, $2, [
+		  OLDCFLAGS="$CFLAGS"
+		  OLDCPPFLAGS="$CPPFLAGS"
+		  CPPFLAGS="$CPPFLAGS ${LIBSPECCFLAGS}"
+		  CFLAGS="$CFLAGS ${LIBSPECCFLAGS}"
+  		  AC_CHECK_HEADER($3, [
+		    if test -n "$7"; then
+		      AC_DEFINE($7, [1], [Define to 1 if you have the <$3> header file.])
+		    fi
+		    if test -n "$6"; then
+		      AC_DEFINE($6, [1], [Define to 1 if you have $2 from $5])
+		    fi
+		    LDFLAGS="$LDFLAGS $LIBSPECFLAGS"
+		    LIBS="$LIBS -l$1"
+		  ], [
+		    CFLAGS="$OLDCFLAGS"
+		    CPPFLAGS="$OLDCPPFLAGS"
+		    AC_MSG_ERROR(Could not find $3)
+		  ])
+		], [
+		  AC_MSG_ERROR(Could not find $5)
+		], $LIBSPECFLAGS)
+  		;;
+  esac
+])