Refine documentation of NAN problem.

diff --git a/doc/posix-headers/math.texi b/doc/posix-headers/math.texi
index a207e16..a7c8df7 100644 (file)
--- a/doc/posix-headers/math.texi
+++ b/doc/posix-headers/math.texi
@@ -8,13 +8,13 @@ Gnulib module: math
 Portability problems fixed by Gnulib:
 @itemize
 @item
-Some platforms do not provide a definition of NAN:
-Solaris 8.
-
+The macro @code{NAN} is not defined on some platforms:
+OpenBSD 4.0, AIX 5.1, IRIX 6.5, OSF/1 5.1, Solaris 10.
 @end itemize
 
 Portability problems not fixed by Gnulib:
 @itemize
-NAN is not a compile time constant with some broken compilers:
-Compaq (ex-DEC) C 6.4
+@item
+@code{NAN} is not a compile time constant with some compilers:
+OSF/1 with Compaq (ex-DEC) C 6.4.
 @end itemize