[MacPorts] #49779: libunwind @3.7.0 fails building on 10.6.8

[MacPorts]

#49779: libunwind @3.7.0 fails building on 10.6.8
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  Reporter:  braumann@…  |      Owner:  macports-tickets@…
      Type:  defect      |     Status:  closed
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.3.4
Resolution:  fixed       |   Keywords:
      Port:  libunwind   |
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Comment (by braumann@…):

 Thanks! Problem solved.

 Please note, Xcode gcc-4.2 or llvm-gcc-4.2 (also the the variants from
 MacPorts) do not work on my 10.6.8 system, what works are macports-ggc-4.7
 and higher as well as macports-clang-3.5 and higher as well as clang from
 Xcode 4.2 (it builds within seconds, so I could make a brief "survey" on
 compiler functionality), finally I took

 {{{
 $ sudo port -s upgrade libunwind configure.compiler=macports-gcc-5
 }}}

 Maybe you can blacklist some which do not work (as mentioned before).

 BTW, just for completeness, here is the error which is issued when
 building failed (e.g. with llvm-gcc-4.2):

 {{{
 :info:build In file included from UnwindCursor.hpp:32,
 :info:build                  from libunwind.cpp:27:
 :info:build EHHeaderParser.hpp: In static member function ‘static bool
 libunwind::EHHeaderParser<A>::findFDE(A&, typename A::pint_t, typename
 A::pint_t, uint32_t, typename libunwind::CFI_Parser<A>::FDE_Info*,
 typename libunwind::CFI_Parser<A>::CIE_Info*)’:
 :info:build EHHeaderParser.hpp:103: error: expected `;' before ‘hdrInfo’
 :info:build EHHeaderParser.hpp:104: error: ‘hdrInfo’ was not declared in
 this scope
 :info:build make: *** [libunwind.o] Error 1
 }}}

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Ticket URL: <https://trac.macports.org/ticket/49779#comment:3>
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