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-rw-r--r--m4/accept4.m418
1 files changed, 18 insertions, 0 deletions
diff --git a/m4/accept4.m4 b/m4/accept4.m4
new file mode 100644
index 000000000..841e9b50f
--- /dev/null
+++ b/m4/accept4.m4
@@ -0,0 +1,18 @@
+# accept4.m4 serial 2
+dnl Copyright (C) 2009-2017 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_ACCEPT4],
+[
+ AC_REQUIRE([gl_SYS_SOCKET_H_DEFAULTS])
+
+ dnl Persuade glibc <sys/socket.h> to declare accept4().
+ AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+ AC_CHECK_FUNCS_ONCE([accept4])
+ if test $ac_cv_func_accept4 != yes; then
+ HAVE_ACCEPT4=0
+ fi
+])