> On Sep 20, 2014, at 16:59, Lawrence Velázquez <[email protected]> wrote:
>
> On Sep 20, 2014, at 7:45 PM, Brandon Allbery <[email protected]> wrote:
>
>> On Sat, Sep 20, 2014 at 7:43 PM, Ryan Schmidt <[email protected]>
>> wrote:
>>
>>>> Why does ld64 need the *-headers ports at all?
>>>
>>> Good question. Jeremy?
>>
>> I expect it's common definitions for C++ exception handling/stack unwinding.
>> ld64 needs it to generate the link time information needed to support it;
>> the compilers possibly should use the same port but include their own
>> currently, hence the conflict? Or, more likely, they're shared between ld64
>> and clang but gcc does its own thing and can't easily be fixed to use
>> clang/llvm's.
>
> The dependency was introduced in response to
> http://trac.macports.org/ticket/33439. I can't really understand what was
> going on there, though.
It was there before that change, and even before it was a dependency, the ld64
just downloaded the headers itself:
$ svn diff -c 90446 | grep unwind
+depends_build port:llvm-${llvm_version} port:libunwind-headers \
- depends_build-append port:libunwind-headers \
- depends_build-append port:libunwind-headers \
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