[MacPorts] #64715: gdal @3.4.0 +poppler: Build Failure

[MacPorts]

#64715: gdal @3.4.0 +poppler: Build Failure
----------------------+--------------------
  Reporter:  ashimog  |      Owner:  (none)
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.7.1
Resolution:           |   Keywords:
      Port:  gdal     |
----------------------+--------------------
Description changed by ashimog:

Old description:

> Poppler 22+ requires c++17 while this port still uses c++14.
> {{{
> /opt/local/include/poppler/Form.h:326:10: error: no template named
> 'optional' in namespace 'std'
>     std::optional<GooString> getCheckedSignature(Goffset
> *checkedFileSize);
>     ~~~~~^
> /opt/local/include/poppler/Form.h:619:10: error: no template named
> 'optional' in namespace 'std'
>     std::optional<GooString> getCheckedSignature(Goffset
> *checkedFileSize);
>     ~~~~~^
> 2 errors generated.
> }}}
>
> This is the exactly same issue as
> https://github.com/OSGeo/gdal/issues/5071.
>
> Change `compiler.cxx_standard` to `2017`, and \\
> add `configure.cxxflags-append -std=c++17` solves this problem.

New description:

 Poppler 22+ requires c++17 while this port still uses c++14.
 {{{
 /opt/local/include/poppler/Form.h:326:10: error: no template named
 'optional' in namespace 'std'
     std::optional<GooString> getCheckedSignature(Goffset
 *checkedFileSize);
     ~~~~~^
 /opt/local/include/poppler/Form.h:619:10: error: no template named
 'optional' in namespace 'std'
     std::optional<GooString> getCheckedSignature(Goffset
 *checkedFileSize);
     ~~~~~^
 2 errors generated.
 }}}

 This is exactly the same issue as
 https://github.com/OSGeo/gdal/issues/5071.

 Change `compiler.cxx_standard` to `2017`, and \\
 add `configure.cxxflags-append -std=c++17` solves this problem.

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Ticket URL: <https://trac.macports.org/ticket/64715#comment:1>
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