+
+dnl Check for socklen_t: historically on BSD it is an int, and in
+dnl POSIX 1g it is a type of its own, but some platforms use different
+dnl types for the argument to getsockopt, getpeername, etc. So we
+dnl have to test to find something that will work.
+
+dnl This test originally comes from lftp, by way of Albert Chin at The
+dnl Written Word. Thanks!
+
+AC_DEFUN([TYPE_SOCKLEN_T],
+[
+ AC_MSG_CHECKING([for socklen_t])
+ AC_CACHE_VAL([lftp_cv_socklen_t],
+ [
+ lftp_cv_socklen_t=no
+ AC_TRY_COMPILE([
+ #include <sys/types.h>
+ #include <sys/socket.h>
+ ],
+ [
+ socklen_t len;
+ getpeername(0,0,&len);
+ ],
+ [
+ lftp_cv_socklen_t=yes
+ ])
+ ])
+ AC_MSG_RESULT($lftp_cv_socklen_t)
+ if test $lftp_cv_socklen_t = no; then
+ AC_MSG_CHECKING([for socklen_t equivalent])
+ AC_CACHE_VAL([lftp_cv_socklen_t_equiv],
+ [
+ lftp_cv_socklen_t_equiv=int
+ AC_LANG_SAVE
+ for t in int size_t unsigned long "unsigned long"; do
+ AC_TRY_COMPILE([
+ #include <sys/types.h>
+ #include <sys/socket.h>
+ ],
+ [
+ $t len;
+ getpeername(0,0,&len);
+ ],
+ [
+ lftp_cv_socklen_t_equiv="$t"
+ break
+ ])
+ done
+ ])
+ AC_MSG_RESULT($lftp_cv_socklen_t_equiv)
+ AC_DEFINE_UNQUOTED(socklen_t, $lftp_cv_socklen_t_equiv,
+ [type to use in place of socklen_t if not defined])
+ fi
+])
+