Add reference to POSIX.

[pspp] / doc / headers / sys_sem.texi

diff --git a/doc/headers/sys_sem.texi b/doc/headers/sys_sem.texi
index 4c23bed46fc57df6dfae7112f82ed4d1c48c4095..038798f529968b1cca25bdc02e2db95289dc7038 100644 (file)
--- a/doc/headers/sys_sem.texi
+++ b/doc/headers/sys_sem.texi
@@ -1,6 +1,8 @@
 @node sys/sem.h
 @section @file{sys/sem.h}
 
+POSIX specification: @url{http://www.opengroup.org/susv3xbd/sys/sem.h.html}
+
 Gnulib module: ---
 
 Portability problems fixed by Gnulib: