#20779: NTL 9.8.1 does not build on OS X versions 10.8 and 10.9
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       Reporter:  dunfield                       |        Owner:
           Type:  defect                         |       Status:  new
       Priority:  major                          |    Milestone:  sage-7.3
      Component:  algebra                        |   Resolution:
       Keywords:  MacOS AVX no such instruction  |    Merged in:
        Authors:                                 |    Reviewers:
Report Upstream:  N/A                            |  Work issues:
         Branch:                                 |       Commit:
   Dependencies:                                 |     Stopgaps:
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Comment (by dunfield):

 Replying to [comment:17 fbissey]:
 > And
 > {{{
 > (sage-sh) fbissey@Mirage:sage-7.2.beta5$ as --help
 > OVERVIEW: clang LLVM compiler
 >
 > USAGE: clang [options] <inputs>
 > }}}
 > so the `as` on the path is already `clang`.

 What version of OS X is this?  On 10.8 and 10.9, the `as` command doesn't
 even accept the `--help` flag and `as -v` gives (on 10.9)
 {{{
 Apple Inc version cctools-862, GNU assembler version 1.38
 }}}
 I think Apple switched to a clang-based `as` in either 10.10 or 10.11,
 which is why this version of NTL has been confirmed to work on 10.11 but
 fails on 10.8 and 10.9.

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