5 LSB specification:@* @url{https://refspecs.linuxbase.org/LSB_5.0.0/LSB-Core-generic/LSB-Core-generic/baselib-y1l.html}
11 @ref{Special Functions,,Special Functions,libc},
14 @url{https://www.gnu.org/software/libc/manual/html_node/Special-Functions.html},
17 @uref{https://www.kernel.org/doc/man-pages/online/pages/man3/y1l.3.html,,man y1l}.
22 Portability problems fixed by Gnulib:
26 Portability problems not fixed by Gnulib:
29 This function is missing on some platforms:
30 Mac OS X 10.13, FreeBSD 6.0, NetBSD 9.0, OpenBSD 6.7, Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5, Cygwin 2.9, mingw, MSVC 14, Android 9.0.