AC_CHECK_HEADER(lopsub.h, [], [HAVE_LOPSUB=no])
AC_CHECK_LIB([lopsub], [lls_merge], [], [HAVE_LOPSUB=no])
if test $HAVE_LOPSUB = no; then AC_MSG_ERROR([
AC_CHECK_HEADER(lopsub.h, [], [HAVE_LOPSUB=no])
AC_CHECK_LIB([lopsub], [lls_merge], [], [HAVE_LOPSUB=no])
if test $HAVE_LOPSUB = no; then AC_MSG_ERROR([