5 POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/ilogbl.html}
9 Portability problems fixed by Gnulib:
12 This function is missing on some platforms:
13 FreeBSD 5.2.1, NetBSD 7.1, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 9, Cygwin 1.7.x, MSVC 9.
15 This function returns a wrong result for a zero argument on some platforms:
16 @c https://cygwin.com/ml/cygwin/2019-12/msg00074.html
19 This function returns a wrong result for denormalized arguments on some platforms:
23 Portability problems not fixed by Gnulib: