X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=doc%2Fposix-headers%2Fmath.texi;h=d0de2bae43b8a4587271954969ce7a307ca5fa66;hb=29abb5463234236cae0d607db33f16aeae395a39;hp=dde9cd0378d73a10fd8b928226c84786f573f553;hpb=2b6c08c775ae4e80b52aa41058ea5939f778b44b;p=gnulib.git

diff --git a/doc/posix-headers/math.texi b/doc/posix-headers/math.texi
index dde9cd037..d0de2bae4 100644
--- a/doc/posix-headers/math.texi
+++ b/doc/posix-headers/math.texi
@@ -1,14 +1,30 @@
 @node math.h
 @section @file{math.h}
 
-POSIX specification: @url{http://www.opengroup.org/susv3xbd/math.h.html}
+POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/basedefs/math.h.html}
 
 Gnulib module: math
 
 Portability problems fixed by Gnulib:
 @itemize
+@item
+The macro @code{NAN} is not defined on some platforms:
+OpenBSD 4.0, AIX 5.1, IRIX 6.5, OSF/1 5.1.
+
+@item
+The macro @code{NAN} is not exposed outside of C99 compilation on some
+platforms:
+glibc.
+
+@item
+The macros @code{NAN} and @code{HUGE_VAL} expand to a function address
+rather than a floating point constant on some platforms:
+Solaris 10.
 @end itemize
 
 Portability problems not fixed by Gnulib:
 @itemize
+@item
+@code{NAN} is not a compile time constant with some compilers:
+OSF/1 with Compaq (ex-DEC) C 6.4.
 @end itemize