9.525 log2f
POSIX specification:
http://www.opengroup.org/onlinepubs/9699919799/functions/log2f.html
Gnulib module: log2f or log2f-ieee
Portability problems fixed by either Gnulib module log2f
or log2f-ieee
:
- This function is missing on some platforms:
FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, older IRIX 6.5, Solaris 9, MSVC 9,
Interix 3.5.
- This function is not declared on some platforms:
IRIX 6.5.
- This function is only provided as a macro on some platforms:
Cygwin 1.5.x.
- This function returns a wrong value for a minus zero argument on some platforms:
OSF/1 5.1.
- This function returns slightly wrong values for exact powers of 2 on some platforms:
Cygwin 1.7.9.
Portability problems fixed by Gnulib module log2f-ieee
:
- This function returns a wrong value for a negative argument on some platforms:
NetBSD 5.1, Solaris 11 2011-11.
Portability problems not fixed by Gnulib: