Add reference to POSIX.

[pspp] / doc / headers / math.texi

diff --git a/doc/headers/math.texi b/doc/headers/math.texi
index 0d12d9cd8d5a1bb62f2c646e029740a618b74ec0..dde9cd0378d73a10fd8b928226c84786f573f553 100644 (file)
--- a/doc/headers/math.texi
+++ b/doc/headers/math.texi
@@ -1,6 +1,8 @@
 @node math.h
 @section @file{math.h}
 
+POSIX specification: @url{http://www.opengroup.org/susv3xbd/math.h.html}
+
 Gnulib module: math
 
 Portability problems fixed by Gnulib: