8.521 log2
POSIX specification:
http://www.opengroup.org/onlinepubs/9699919799/functions/log2.html
Gnulib module: —
Portability problems fixed by Gnulib:
Portability problems not fixed by Gnulib:
- This function is missing on some platforms:
MacOS X 10.5, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, IRIX 6.5,
Solaris 9, Interix 3.5.
- This function is only provided as a macro on some platforms:
Cygwin 1.5.x.