Add reference to POSIX.

[pspp] / doc / headers / sys_ipc.texi

diff --git a/doc/headers/sys_ipc.texi b/doc/headers/sys_ipc.texi
index aaff48c97a4ed25f8dc487234cf27fce315b7aeb..81e4f67e6fec4e36ad26a322375ee7187a2d8033 100644 (file)
--- a/doc/headers/sys_ipc.texi
+++ b/doc/headers/sys_ipc.texi
@@ -1,6 +1,8 @@
 @node sys/ipc.h
 @section @file{sys/ipc.h}
 
+POSIX specification: @url{http://www.opengroup.org/susv3xbd/sys/ipc.h.html}
+
 Gnulib module: ---
 
 Portability problems fixed by Gnulib: