2 files changed, 23 insertions, 0 deletions
diff --git a/gnulib b/gnulib
deleted file mode 160000
-Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1
diff --git a/gnulib/m4/passfd.m4 b/gnulib/m4/passfd.m4
new file mode 100644
index 0000000..2028f7f
--- /dev/null
+++ b/gnulib/m4/passfd.m4
@@ -0,0 +1,23 @@
+# passfd.m4 serial 8
+dnl Copyright (C) 2011 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_PASSFD],
+[
+  AC_REQUIRE([gl_HEADER_SYS_SOCKET])
+  AC_CHECK_FUNCS_ONCE([recvmsg sendmsg])
+
+  dnl Persuade AIX 5.2 <sys/socket.h> to declare CMSG_SPACE, CMSG_LEN.
+  dnl CMSG_FIRSTHDR is POSIX 2008, but CMSG_SPACE is only in RFC 3542.
+  AC_DEFINE([_LINUX_SOURCE_COMPAT], [1],
+    [Define in order to get some macros on AIX systems.])
+
+  dnl Passfd prefers the POSIX use of msg.msg_control if the CMSG_* macros
+  dnl are present, but can fall back to BSD 4.3 style of msg.msg_accrights.
+  AC_CHECK_MEMBERS([struct msghdr.msg_accrights], [], [], [[
+    #include <sys/types.h>
+    #include <sys/socket.h>
+  ]])
+])