Tests for module 'unistr/u8-strnlen'.

[gnulib.git] / doc / posix-headers / math.texi

diff --git a/doc/posix-headers/math.texi b/doc/posix-headers/math.texi
index dde9cd0..a0fa6aa 100644 (file)
--- a/doc/posix-headers/math.texi
+++ b/doc/posix-headers/math.texi
@@ -7,8 +7,24 @@ 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