+ SIGVAL_PTR="undefined"
+ if test "$ac_cv_header_aio_h" = "yes" -o "$ac_cv_header_sys_aio_h" = "yes" ; then
+ AC_CHECK_MEMBER(union sigval.sigval_ptr,SIGVAL_PTR="sigval_ptr",, [
+ #include <sys/signal.h>
+ ])
+ AC_CHECK_MEMBER(union sigval.sival_ptr,SIGVAL_PTR="sival_ptr",, [
+ #include <sys/signal.h>
+ ])
+ if test "$SIGVAL_PTR" = "undefined" ; then
+ AC_MSG_ERROR([Unable to detect field name in 'union sigval'])
+ fi
+ fi
+ AC_DEFINE_UNQUOTED(SIGVAL_PTR,$SIGVAL_PTR,[Pointer field name in 'union sigval'])