5 POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/log2.html}
9 Portability problems fixed by Gnulib:
12 This function is missing on some platforms:
13 FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, older IRIX 6.5,
14 Solaris 9, MSVC 9, Interix 3.5.
16 This function is not declared on some platforms:
19 This function is only provided as a macro on some platforms:
22 This function returns a wrong value for a minus zero argument on some platforms:
25 This function returns slightly wrong values for exact powers of 2 on some platforms:
29 Portability problems not fixed by Gnulib: