Eric Blake wrote on 2009-11-17:
> unsetenv(name) only cleared the first instance, even if (ab)use of
> putenv, or assignment to environ, included duplicates of name.
>
> * m4/setenv.m4 (gl_FUNC_UNSETENV): Check for bug.
> * lib/unsetenv.c (rpl_unsetenv): Work around it.
I'm adding doc about this workaround:
2009-12-09 Bruno Haible <br...@clisp.org>
* doc/posix-functions/unsetenv.texi: Mention Solaris 10 bug for which a
workaround was added on 2009-11-17.
*** doc/posix-functions/unsetenv.texi.orig 2009-12-09 21:59:08.000000000
+0100
--- doc/posix-functions/unsetenv.texi 2009-12-09 21:57:17.000000000 +0100
***************
*** 19,24 ****
--- 19,28 ----
On some platforms, this function does not fail with @samp{EINVAL} when
passed a null pointer, an empty string, or a string containing @samp{=}:
FreeBSD 6.0, NetBSD 1.6, OpenBSD 3.8.
+ @item
+ This function removes only the first value association for the given
+ environment variable, not all of them, on some platforms:
+ Solaris 10.
@end itemize
Portability problems not fixed by Gnulib:
