+dnl hivex library (highly recommended).
+dnl This used to be a part of libguestfs, but was spun off into its
+dnl own separate upstream project in libguestfs 1.0.85.
+HAVE_HIVEX=yes
+PKG_CHECK_MODULES([HIVEX], [hivex],,[
+ HAVE_HIVEX=no
+ AC_MSG_WARN([Hivex library and headers are missing, so optional Windows Registry tools won't be built])])
+AM_CONDITIONAL([HAVE_HIVEX],[test "x$HAVE_HIVEX" = "xyes"])
+AC_SUBST([HIVEX_CFLAGS])
+AC_SUBST([HIVEX_LIBS])
+
+dnl FUSE is optional to build the FUSE module.
+HAVE_FUSE=yes
+PKG_CHECK_MODULES([FUSE],[fuse],,[
+ HAVE_FUSE=no
+ AC_MSG_WARN([FUSE library and headers are missing, so optional FUSE module won't be built])])
+AM_CONDITIONAL([HAVE_FUSE],[test "x$HAVE_FUSE" = "xyes"])
+