Issue #7523: Add SOCK_CLOEXEC and SOCK_NONBLOCK to the socket module,
where supported by the system. Patch by Nikita Vetoshkin.
diff --git a/configure.in b/configure.in
index 31ed91e..dc74743 100644
--- a/configure.in
+++ b/configure.in
@@ -2550,7 +2550,7 @@
AC_MSG_RESULT(MACHDEP_OBJS)
# checks for library functions
-AC_CHECK_FUNCS(alarm setitimer getitimer bind_textdomain_codeset chown \
+AC_CHECK_FUNCS(alarm accept4 setitimer getitimer bind_textdomain_codeset chown \
clock confstr ctermid execv fchmod fchown fork fpathconf ftime ftruncate \
gai_strerror getgroups getlogin getloadavg getpeername getpgid getpid \
getpriority getresuid getresgid getpwent getspnam getspent getsid getwd \