+dnl check for support for Solaris Trusted Extensions
+AC_CHECK_HEADERS([tsol/label.h])
+AC_CHECK_FUNCS([is_system_labeled])
+
+dnl check for IOV_MAX, and fall back to UIO_MAXIOV on BSDish systems
+AC_CHECK_DECL([IOV_MAX], [],
+ [AC_CHECK_DECL([UIO_MAXIOV], [AC_DEFINE([IOV_MAX], [UIO_MAXIOV])],
+ [AC_DEFINE([IOV_MAX], [16], [Define if not provided by <limits.h>])],
+ [[#include <sys/uio.h>]])],
+ [[#include <limits.h>]])
+