[Bug bootstrap/67546] bootstrap broken on x86_64-w64-mingw32, error: '::unsetenv' has not been declared in gcc.c

[ktietz at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67546

Kai Tietz <ktietz at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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             Target|x86_64-w64-mingw32          |*-*-mingw32
           Priority|P3                          |P1
                 CC|                            |dmalcolm at gcc dot gnu.org

--- Comment #4 from Kai Tietz <ktietz at gcc dot gnu.org> ---
Hi David,

this issue was introduced by your commit done at 2015-08-25