5 POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/ilogbf.html}
9 Portability problems fixed by Gnulib:
12 This function is missing on some platforms:
13 Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 9, MSVC 9.
15 This function returns a wrong result for a zero argument on some platforms:
18 This function returns a wrong result for an infinite argument on some platforms:
19 NetBSD 7.1, OpenBSD 6.7.
22 Portability problems not fixed by Gnulib: