boost libstdc++ issue (was libvisio error)
devans at macports.org
Sun Sep 6 13:19:37 PDT 2015
On 9/6/15 12:33 PM, Ryan Schmidt wrote:
> On Sep 6, 2015, at 13:43, David Evans wrote:
>> It may be that boost is configuring for libc++ on 10.7, 10.8 instead of libstdc++ but, if that is the case, that is not
>> correct and would lead to the type of failure reported in this thread.
> I thought it did, and that you fixed it in:
> But maybe additional fixes are needed in this new version of boost.
> Did you ever report that problem to the developers of boost? We don't want to forever maintain patches for this problem
> in MacPorts; the fixes should be committed to the boost repository.
Wow!! I completely forgot about doing that!!
In any case, this patch sets BOOST_APPLE_CLANG_NO_LIBCXX which apparently doesn't translate into
BOOST_NO_CXX11_RVALUE_REFERENCES and there's a whole lot of other BOOST_NO_CXX11_* macros as well.
In the current version, BOOST_APPLE_CLANG_NO_LIBCXX is used only in boost/multi_index/detail/vartempl_support.hpp,
which I think was the previous problem.
After looking at the Boost.Config documentation, I'm wondering now if using a custom user.hpp might not be a better
approach than patching clang.hpp. Running their configure util (libs/config/configure) should run all the necessary
tests and generate a recommended user.hpp (in the cwd). Unfortunately, I don't have a Lion system handy to see the
results myself. Could you do this and publish the results? I'm curious to see if BOOST_NO_CXX11_RVALUE_REFERENCES is
included. Or whatever else is included for that matter.
I haven't mentioned this upstream as yet because I'm not really sure whether this should be considered a bug in the
Boost configuration system or just a failure on our part to add an appropriate user.hpp. If we could come up with the
correct configuration we could ask that they include that upstream somewhere appropriate.
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