5 POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/logbl.html}
9 Portability problems fixed by Gnulib:
12 This function is missing on some platforms:
13 FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, HP-UX 11, older IRIX 6.5, Solaris 9, Cygwin, MSVC 9, Interix 3.5, BeOS, Android 4.2.
15 This function produces wrong results for subnormal numbers on some platforms:
16 glibc 2.11/powerpc, glibc 2.7/sparc, glibc 2.7/hppa, Solaris 11.0,
17 glibc 2.23/powerpc64le.
20 Portability problems not fixed by Gnulib: