[KDE/Mac] Review Request 124894: [OS X] make it build

Thu Aug 27 16:31:49 UTC 2015

> On Aug. 27, 2015, 7:41 a.m., Kevin Ottens wrote:
> > src/domain/queryresultprovider.h, lines 35-40
> > <https://git.reviewboard.kde.org/r/124894/diff/2/?file=399196#file399196line35>
> >
> >     And don't forget to put that part in the new header. ;-)
> 
> René J.V. Bertin wrote:
>     But that's *only* required in this header, and shouldn't be included in code that doesn't load the QSharedPointer definition. I found that out the hard way, so there are that kind of files which also use mem_fn. I could of course test for the token that gets set by the headerfile defining QSharedPointer, but is user code supposed to do that kind of thing?
> 
> Kevin Ottens wrote:
>     It would be only activated in the boost case. Also I guess there's a way to not make it dependent on QSharedPointer if that's parameterized as well. What we really want is for it to work with any smart pointer type which has a data() method to get to the raw pointer.

The easiest way to handle the QSharedPointer case is like this:

```
#   ifdef QSHAREDPOINTER_H
    namespace boost {
        template<class T> T* get_pointer(const QSharedPointer<T> &pointer)
        {
            return pointer.data();
        }
    }
#   endif

#   include <boost/mem_fn.hpp>
```

but the real problem I have is with defining a mem_fn wrapper. mem_fn is a wrapper itself already, and according to the boost docs there are at least 7 overloads each with its own "unspecified" return type : http://www.boost.org/doc/libs/1_55_0/libs/bind/mem_fn.html#mem_fn . It seems likely that those types will vary from std implementation to implementation ...

I'm now trying the following shot in the dark, seeing what it leads to:

```
namespace Utils {
    template <class Ret, class T> void* mem_fn(Ret T::*f)
    {
#   ifdef ZANSHIN_USE_BOOST_MEM_FN
        return boost::mem_fn<Ret, T>(f);
#   else
        return std::mem_fn<Ret, T>(f);
#   endif
    }
}
```

- René J.V.

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On Aug. 26, 2015, 11:12 p.m., René J.V. Bertin wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/124894/
> -----------------------------------------------------------
> 
> (Updated Aug. 26, 2015, 11:12 p.m.)
> 
> 
> Review request for KDE Software on Mac OS X and Zanshin.
> 
> 
> Repository: zanshin
> 
> 
> Description
> -------
> 
> This is a set of patches that allow zanshin version `0.2.1-1163-gbf5c321` to build on OS X against the git head (or almost head) of kdelibs 4.14 and kdepim* 4.14 .
> I presume for now that a number of changes are self-explanatory (for instance, `zanshinkdepimstatic` calls itself static, isn't installed and doesn't export any symbols explicitly so all points to it being intended to be a static instead of a shared lib).
> The patches that disable a number of tests, and I do not understand myself what exactly goes wrong without them other than that the linker gives errors like
> 
> ```
> # Undefined symbols for architecture x86_64:
> #   "decltype(*(std::__1::forward<QSharedPointer<Domain::QueryResult<QString> > >(fp0)).*fp(std::__1::forward<>(fp1))) std::__1::__invoke<QList<std::__1::function<void (QString, int)> > (Domain::QueryResult<QString>::*&)() const, QSharedPointer<Domain::QueryResult<QString> >, void>(QList<std::__1::function<void (QString, int)> > (Domain::QueryResult<QString>::*&&&)() const, QSharedPointer<Domain::QueryResult<QString> >&&)", referenced from:
> #       std::__1::__function::__func<std::__1::__mem_fn<QList<std::__1::function<void (QString, int)> > (Domain::QueryResult<QString>::*)() const>, std::__1::allocator<std::__1::__mem_fn<QList<std::__1::function<void (QString, int)> > (Domain::QueryResult<QString>::*)() const> >, QList<std::__1::function<void (QString, int)> > (QSharedPointer<Domain::QueryResult<QString> >)>::operator()(QSharedPointer<Domain::QueryResult<QString> >&&) in queryresulttest.o
> # ld: symbol(s) not found for architecture x86_64
> # clang: error: linker command failed with exit code 1 (use -v to see invocation)
> ```
> 
> Possibly a comparable to the reason why I had to define the `std::accumulate` functions.
> 
> 
> Diffs
> -----
> 
>   3rdparty/kdepim/libkdepim/CMakeLists.txt cc8845a 
>   3rdparty/kdepim/libkdepim/tests/CMakeLists.txt 775ac0e 
>   CMakeLists.txt 71b16a8 
>   src/akonadi/akonadiserializer.cpp 5116fa5 
>   src/domain/queryresultprovider.h 5d0b02d 
>   src/presentation/errorhandler.cpp 5610040 
>   tests/testlib/akonadistoragetestbase.cpp 8573374 
>   tests/units/akonadi/akonadidatasourcequeriestest.cpp c2e87dc 
>   tests/units/widgets/applicationcomponentstest.cpp f972673 
> 
> Diff: https://git.reviewboard.kde.org/r/124894/diff/
> 
> 
> Testing
> -------
> 
> On OS X 10.9.5 with the system compiler (`Apple LLVM version 6.0 (clang-600.0.57) (based on LLVM 3.5svn)`)
> 
> My initial reason to install this was to "check it out" and learn how to use it, so I have not done any further testing ...
> 
> 
> File Attachments
> ----------------
> 
> datasourcequeriestest.cpp preprocessed by Apple Clang 6
>   https://git.reviewboard.kde.org/media/uploaded/files/2015/08/24/b2f3e229-ca5a-4e55-b33b-6504b2cdb5c7__datasourcequeriestest-AppleClang6.i
> datasourcequeriestest.cpp preprocessed by clang 3.6.1
>   https://git.reviewboard.kde.org/media/uploaded/files/2015/08/24/807e30a4-aa34-45b4-9e5c-92020ee8c7f5__datasourcequeriestestClang3.6.i
> 
> 
> Thanks,
> 
> René J.V. Bertin
> 
>

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