Add reference to POSIX.

[pspp] / doc / headers / errno.texi

diff --git a/doc/headers/errno.texi b/doc/headers/errno.texi
index 8c7b19eb738f3db99dc86e68db7e130c3b3aa4db..b32ea5cb95b82f4adc7ffb0452ddba67dba80c7b 100644 (file)
--- a/doc/headers/errno.texi
+++ b/doc/headers/errno.texi
@@ -1,6 +1,8 @@
 @node errno.h
 @section @file{errno.h}
 
+POSIX specification: @url{http://www.opengroup.org/susv3xbd/errno.h.html}
+
 Gnulib module: ---
 
 Portability problems fixed by Gnulib: