"recent libcxx regression" reason discovered. clang version info/folder changed. possibly accidental?

[G M]

Hi Everyone

It would appear that the recent build problems that suddenly appeared for
me that were manifesting through libcxx no longer building was caused by
the clang headers changing directory or something like that.

Files like x86intrin.h were in

\llvm\lib\clang\3.5\include

but somehow for some reason changed to

\llvm\lib\clang\3.5.0\include

This may be intentional but I thought I'd call my discovery out since it
might be accidental and may cause other people problems like it did me.

In my case It resulted in a simple hard coded script I had failing to
pickup the latest versions of headers because they "moved" unexpectedly.

I changed my local custom script to note that ,0 change and everything
builds again now.

Hope this info is useful to others.
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