Patch to enable -fPIE and -fstack-protector by default on OpenBSD

[Rafael Espíndola]

needs a testcase.

On 31 May 2013 22:09, Matthew Dempsky <matthew at dempsky.org> wrote:
> On OpenBSD, we enable -fPIE and -fstack-protector by default in GCC.
> Patch below does the same for Clang.
>
> --- tools/clang/lib/Driver/ToolChains.h.orig    Mon Apr 29 18:21:43 2013
> +++ tools/clang/lib/Driver/ToolChains.h Fri May 31 18:23:13 2013
> @@ -427,6 +427,11 @@ class LLVM_LIBRARY_VISIBILITY OpenBSD : public Generic
>
>    virtual bool IsMathErrnoDefault() const { return false; }
>    virtual bool IsObjCNonFragileABIDefault() const { return true; }
> +  virtual bool isPIEDefault() const { return true; }
> +
> +  virtual unsigned GetDefaultStackProtectorLevel(bool KernelOrKext) const {
> +    return 1;
> +  }
>
>  protected:
>    virtual Tool *buildAssembler() const;
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