@node ilogbl @section @code{ilogbl} @findex ilogbl POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/ilogbl.html} Gnulib module: ilogbl Portability problems fixed by Gnulib: @itemize @item This function is missing on some platforms: 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. @item This function returns a wrong result for a zero argument on some platforms: @c https://cygwin.com/ml/cygwin/2019-12/msg00074.html Cygwin 2.9. @item This function returns a wrong result for denormalized arguments on some platforms: AIX 7.1 64-bit, Haiku 2017. @end itemize Portability problems not fixed by Gnulib: @itemize @end itemize