4 POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/basedefs/math.h.html}
8 Portability problems fixed by Gnulib:
11 The conversion from @code{int} to @code{long double} in incorrect on some
13 glibc 2.7 on Linux/SPARC64.
16 The macro @code{NAN} is not defined on some platforms:
17 OpenBSD 4.0, AIX 5.1, IRIX 6.5, OSF/1 5.1.
20 The macro @code{NAN} is not exposed outside of C99 compilation on some
25 The macros @code{NAN} and @code{HUGE_VAL} expand to a function address
26 rather than a floating point constant on some platforms:
30 Portability problems not fixed by Gnulib:
33 @code{NAN} is not a compile time constant with some compilers:
34 OSF/1 with Compaq (ex-DEC) C 6.4.