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

[MacPorts]

#49779: libunwind @3.7.0 fails building on 10.6.8
------------------------+--------------------------------
 Reporter:  braumann@…  |      Owner:  macports-tickets@…
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.3.4
 Keywords:              |       Port:  libunwind
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 While upgrading {{{libunwind}}} from {{{3.6.0_0}}} to {{{3.7.0_0}}} I ran
 in the following error:

 {{{
 ...
 :info:build /usr/bin/llvm-gcc-4.2 -arch x86_64 -force_cpusubtype_ALL
 -I../include -I/opt/local/include -DUSE_MACPORTS_LIBUNWIND -DNDEBUG  -c -o
 UnwindRegistersRestore.o UnwindRegistersRestore.S
 :info:build /usr/bin/llvm-gcc-4.2 -arch x86_64 -force_cpusubtype_ALL
 -I../include -I/opt/local/include -DUSE_MACPORTS_LIBUNWIND -DNDEBUG  -c -o
 UnwindRegistersSave.o UnwindRegistersSave.S
 :info:build libunwind.cpp:19:17: error: tuple: No such file or directory
 :info:build In file included from UnwindCursor.hpp:32,
 :info:build                  from libunwind.cpp:30:
 :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
 ...
 }}}

 Any ideas why some include file {{{tuple}}} is not being found? I
 experimented with {{{macports-clang-3.*}}} but all face similar problems.

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