Add reference to POSIX.

[pspp] / doc / headers / signal.texi

diff --git a/doc/headers/signal.texi b/doc/headers/signal.texi
index 118f569b664068cf3924e9ce230dcf720812ced7..272e646635a7ba959c134ec622d2a3bf2ed9c316 100644 (file)
--- a/doc/headers/signal.texi
+++ b/doc/headers/signal.texi
@@ -1,6 +1,8 @@
 @node signal.h
 @section @file{signal.h}
 
+POSIX specification: @url{http://www.opengroup.org/susv3xbd/signal.h.html}
+
 Gnulib module: ---
 
 Portability problems fixed by Gnulib: