+AC_MSG_CHECKING(if you want to allow EINTR in wgetch with pthreads)
+AC_ARG_ENABLE(pthreads-eintr,
+ [ --enable-pthreads-eintr enable EINTR in wgetch with pthreads],
+ [use_pthreads_eintr=$enableval],
+ [use_pthreads_eintr=no])
+AC_MSG_RESULT($use_pthreads_eintr)
+if test $use_pthreads_eintr = yes ; then
+ AC_DEFINE(USE_PTHREADS_EINTR)
+fi
+