AC_CHECK_LIB(z, gzopen,[use_compression=true;LIBS="$LIBS -lz"], use_compression=false)
if test $use_compression = true ; then
AC_DEFINE(USE_COMPRESSION, 1, [Define as 1 if you want to support compressed files.])
AC_CHECK_LIB(z, gzopen,[use_compression=true;LIBS="$LIBS -lz"], use_compression=false)
if test $use_compression = true ; then
AC_DEFINE(USE_COMPRESSION, 1, [Define as 1 if you want to support compressed files.])