[llvm] r201608 - Fix PR18743.

[Rafael Espíndola]

On 19 February 2014 17:49, Chris Matthews <chris.matthews at apple.com> wrote:
> It is failing building libLLVMSupport.a in stage 2. ar is failing stating a fatal error in randlib.
>
> We are going to wait for a build with your LTO fix to see if that helps.

What I would suggest trying is

* Check what the command line creating the archive is. The one I am
seeing is attached.
* Find a minimal file list that causes ranlib to assert.
* Then reduce (with delta for example) the preprocessed files leading
into ranlib.

I have done that in the past to debug LTO issues.  If at any point you
can send me the input files (and they also crashes the ranlib in
mavericks) I can finish reducing it.

Cheers,
Rafael
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