5 POSIX specification: @url{http://www.opengroup.org/onlinepubs/9699919799/functions/setenv.html}
9 Portability problems fixed by Gnulib:
12 This function is missing on some platforms:
13 AIX 4.3.2, HP-UX 11, IRIX 6.5, Solaris 9, mingw, BeOS.
15 On some platforms, this function does not fail with @samp{EINVAL} when
16 passed an empty string or a string containing @samp{=}:
17 MacOS X 10.5, FreeBSD 6.0, NetBSD 1.6, OpenBSD 3.8, Cygwin 1.5.x.
19 On some platforms, this function removes a leading @samp{=} from the
24 Portability problems not fixed by Gnulib:
27 Older versions of POSIX required that @code{setenv(NULL,"",0)} gracefully
28 fail with @code{EINVAL}, but not all implementations guarantee this,
29 and the requirement was removed.