2 @subsection @code{clearenv}
9 @ref{Environment Access,,Environment Access,libc},
12 @url{https://www.gnu.org/software/libc/manual/html_node/Environment-Access.html},
15 @uref{https://www.kernel.org/doc/man-pages/online/pages/man3/clearenv.3.html,,man clearenv}.
20 Portability problems fixed by Gnulib:
24 Portability problems not fixed by Gnulib:
27 This function is missing on some platforms:
28 Mac OS X 10.13, FreeBSD 6.0, NetBSD 9.0, OpenBSD 6.7, Minix 3.1.8, IRIX 6.5, Solaris 10, Cygwin 2.9, mingw, MSVC 14.