diff --git a/m4/libgtop.m4 b/m4/libgtop.m4
new file mode 100644
index 0000000..2aef715
--- /dev/null
+++ b/m4/libgtop.m4
@@ -0,0 +1,31 @@
+
+AC_DEFUN([INIT_LIBGTOP],
+[
+
+MINIMUM_LIBGTOP_VERSION=$1
+AC_MSG_CHECKING([for LibGTop >= $MINIMUM_LIBGTOP_VERSION])
+
+PC_FILE="libgtop-2.0"
+
+
+# Make sure the version is sufficient
+
+if $PKG_CONFIG --atleast-version=$MINIMUM_LIBGTOP_VERSION $PC_FILE ; then
+  GTOP_VERSION=`$PKG_CONFIG $PC_FILE --modversion`
+  AC_MSG_RESULT([yes ($GTOP_VERSION)])
+else
+  AC_MSG_RESULT([no])
+  echo "$as_me: ERROR: LibGTop >= $MINIMUM_LIBGTOP_VERSION not found" >&2;
+  echo "$as_me: ERROR: Cannot run without LibGTop."
+  exit 1;
+fi
+
+#OK, we've got what we need, so get the necessary flags to compile
+LIBGTOP_INCS=`$PKG_CONFIG $PC_FILE --cflags`
+LIBGTOP_LIBS=`$PKG_CONFIG $PC_FILE --libs`
+
+# And make sure they get plugged into the Makefile
+AC_SUBST(LIBGTOP_INCS)
+AC_SUBST(LIBGTOP_LIBS)
+
+])