(Function Portability): Add @prindex for exit.

diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index bd6d9574ef89a435ecf75337b7a42b2d68556345..80097e85bfb4dcfdfd828ea0bfd953e339f90545 100644 (file)
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -3539,6 +3539,7 @@ additions.  Please help us keeping it as complete as possible.
 @table @asis
 @item @code{exit}
 @c @fuindex exit
+@prindex @code{exit}
 Did you know that, on some older hosts, @code{exit} returns @code{int}?
 This is because @code{exit} predates @code{void}, and there was a long
 tradition of it returning @code{int}.