[MacPorts] #58740: nettle @3.5.1: build fails on 10.7 due to: sha1-compress-2.s:74:2: error: invalid instruction mnemonic 'sha1rnds4

[MacPorts]

#58740: nettle @3.5.1: build fails on 10.7 due to: sha1-compress-2.s:74:2: error:
invalid instruction mnemonic 'sha1rnds4
---------------------+------------------------
  Reporter:  kencu   |      Owner:  ryandesign
      Type:  defect  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:  lion
      Port:  nettle  |
---------------------+------------------------

Comment (by kencu):

 this incantation fixes it for Intel systems at least.
 {{{
 # error: invalid instruction mnemonic 'sha1rnds4'
 compiler.blacklist-append  *gcc-3.* *gcc-4.* {clang < 426} \
                            macports-clang-3.4 macports-clang-3.7
 compiler.fallback-append   macports-clang-8.0 macports-clang-7.0
 }}}

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Ticket URL: <https://trac.macports.org/ticket/58740#comment:1>
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