[MacPorts] #56517: gdal @2.3.0: A compiler with support for C++11 language features is required

[MacPorts]

#56517: gdal @2.3.0: A compiler with support for C++11 language features is
required
-------------------------------------------------+-------------------------
 Reporter:  ryandesign                           |      Owner:  Veence
     Type:  defect                               |     Status:  assigned
 Priority:  Normal                               |  Milestone:
Component:  ports                                |    Version:
 Keywords:  tiger leopard snowleopard lion       |       Port:  gdal
  mountainlion                                   |
-------------------------------------------------+-------------------------
 gdal fails to build with libstdc++:

 [https://build.macports.org/builders/ports-10.6_i386_legacy-
 builder/builds/42839/steps/install-port/logs/stdio 10.6]:

 {{{
 configure: WARNING: unrecognized options: --without-cpp11
 }}}
 {{{
 checking if use C++14 compiler options... disabled by user
 checking whether /usr/bin/g++-4.2 supports C++11 features by default... no
 checking whether /usr/bin/g++-4.2 supports C++11 features with
 -std=c++11... no
 checking whether /usr/bin/g++-4.2 supports C++11 features with
 -std=c++0x... no
 checking whether /usr/bin/g++-4.2 supports C++11 features with
 +std=c++11... no
 checking whether /usr/bin/g++-4.2 supports C++11 features with -h
 std=c++11... no
 configure: error: *** A compiler with support for C++11 language features
 is required.
 }}}

 [https://build.macports.org/builders/ports-10.8_x86_64_legacy-
 builder/builds/61092/steps/install-port/logs/stdio 10.8]:

 {{{
 configure: WARNING: unrecognized options: --without-cpp11
 }}}
 {{{
 fatal error: 'type_traits' file not found
 #include <type_traits> // for std::is_base_of
          ^
 }}}

 The usual solution is to use the cxx11 1.1 portgroup, but gdal offers
 compiler variants via the mpi portgroup, which is a conflicting concept; I
 don't know how the mpi portgroup intends for this situation to be handled.
 The mpi portgroup includes the compilers portgroup, and the languages
 portgroup seems to work with it and offers a `compiler.cxx_standard`
 option, so maybe you're meant to include the languages portgroup and use
 that.

-- 
Ticket URL: <https://trac.macports.org/ticket/56517>
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