+AC_SUBST(HAVE_ZLIB)
+if test "x$HAVE_ZLIB" = "xyes"; then
+ AC_DEFINE(HAVE_ZLIB)
+fi
+
+HAVE_BZ2=no
+AC_CHECK_LIB(bz2, BZ2_bzopen,[AC_CHECK_HEADER(bzlib.h, [HAVE_BZ2=yes], [])], [])
+AC_SUBST(HAVE_BZ2)
+if test "x$HAVE_BZ2" = "xyes"; then
+ AC_DEFINE(HAVE_BZ2)
+fi