5 POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/ilogb.html}
9 Portability problems fixed by Gnulib:
12 This function is missing on some platforms:
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.
21 This function returns a wrong result for a NaN argument on some platforms:
22 NetBSD 7.1, OpenBSD 6.7.
25 Portability problems not fixed by Gnulib: