[MacPorts] #68235: castxml: builds fail for 10.10/10.11: various compilation errors; blacklist older clang versions

[MacPorts]

#68235: castxml: builds fail for 10.10/10.11: various compilation errors; blacklist
older clang versions
----------------------+----------------------
  Reporter:  mascguy  |      Owner:  stromnov
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.8.1
Resolution:           |   Keywords:
      Port:  castxml  |
----------------------+----------------------
Description changed by mascguy:

Old description:

> The following errors are seen for 10.10/10.11, suggesting that older
> Xcode Clang versions need to be blacklisted:
>
> {{{
> /opt/local/libexec/llvm-15/include/llvm/ADT/STLForwardCompat.h:53:22:
> error: default initialization of an object of const type 'const
> llvm::in_place_t' without a user-provided default constructor
> constexpr in_place_t in_place; // NOLINT(readability-identifier-naming)
>                      ^
>
> /opt/local/libexec/llvm-15/include/llvm/Support/Allocator.h:238:16:
> error: no viable conversion from 'long long' to 'llvm::Optional<int64_t>'
>         return InSlabIdx + static_cast<int64_t>(P - S);
>                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> [...etc...]
> }}}
>
> https://ports.macports.org/port/castxml/builds/

New description:

 The following errors are seen for 10.10/10.11, suggesting that older Xcode
 Clang versions need to be blacklisted:

 {{{
 /opt/local/libexec/llvm-15/include/llvm/ADT/STLForwardCompat.h:53:22:
 error: default initialization of an object of const type 'const
 llvm::in_place_t' without a user-provided default constructor
 constexpr in_place_t in_place; // NOLINT(readability-identifier-naming)
                      ^

 /opt/local/libexec/llvm-15/include/llvm/Support/Allocator.h:238:16:
 error: no viable conversion from 'long long' to 'llvm::Optional<int64_t>'
         return InSlabIdx + static_cast<int64_t>(P - S);
                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 [...etc...]
 }}}

 https://ports.macports.org/port/castxml/builds/

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Ticket URL: <https://trac.macports.org/ticket/68235#comment:1>
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