[MacPorts] #67722: gnucash @5.3: error: no member named 'merge' in 'std::__1::map

[MacPorts]

#67722: gnucash @5.3: error: no member named 'merge' in 'std::__1::map
------------------------+----------------------
 Reporter:  ryandesign  |      Owner:  drkp
     Type:  defect      |     Status:  assigned
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.8.1
 Keywords:  mojave      |       Port:  gnucash
------------------------+----------------------
 [https://build.macports.org/builders/ports-10.14_x86_64-builder/builds/171385/steps
 /install-port/logs/stdio  gnucash 5.3 fails to build] on Mojave:

 {{{
 gnucash/import-export/csv-imp/gnc-import-tx.cpp:904:20: error: no member
 named 'merge' in 'std::__1::map<GncTransPropType,
 std::__1::basic_string<char>, std::__1::less<GncTransPropType>,
 std::__1::allocator<std::__1::pair<const GncTransPropType,
 std::__1::basic_string<char> > > >'
         all_errors.merge (split_props->errors());
         ~~~~~~~~~~ ^
 }}}

 It [https://stackoverflow.com/questions/50444908/clang-6-not-supporting-
 unordered-mapmerge sounds like] Apple clang didn't support `merge` until
 recently while llvm.org's clang does, so those older Apple clangs should
 be excluded with:

 {{{
 PortGroup compiler_blacklist_versions 1.0
 }}}
 {{{
 compiler.blacklist-append {clang < 1100}
 }}}

 On High Sierra and earlier, it fails with a different error; see #67545.

-- 
Ticket URL: <https://trac.macports.org/ticket/67722>
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