[Bug ada/123037] Ada cross to i686-w64-mingw32 fails to build

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123037

--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
<stdlib.h> is in the closure of "mingw32.h" for me.  What version of MINGW64 do
you use?