Specify HEASLR (High Entropy Address Space Layout Randomization) in MinGW-w64
Mozilla patched mingw-w64 to allow the specification of "high-entropy" ASLR, which is an extra hardened ASLR option on Windows. Not sure if this flag only applies to 64bit builds. I think it might.
Here's their ticket: https://github.com/rust-lang/rust/issues/16593 and the patch: https://sourceware.org/ml/binutils/2014-08/msg00167.html and it's approval by the Binutils team: https://sourceware.org/ml/binutils/2014-08/msg00177.html
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