The error of adding Cxx was eliminated by changing small bits in the
makefile. It builds successfully. I am so surprised to find that it is
such a huge package with over 1GB in size.
On Sunday, September 4, 2016 at 6:41:28 AM UTC+8, K leo wrote:
>
> Thanks very much for the advise.
>
> One question is whether Cxx is mature enough to be usable at this stage.
> I tried to add it with Julia 0.5 and got the following errors:
>
> julia> Pkg.add("Cxx")
> INFO: Installing Cxx v0.0.1
> INFO: Building Cxx
> writing path.jl file
> Tuning for julia installation at: /home/xxx/Software/julia-e6f843b073/bin
> g++ -D_GLIBCXX_USE_CXX11_ABI=0 -fno-rtti -DLIBRARY_EXPORTS -fPIC -O0 -g
> -std=c++11 -I/home/xxx/Software/julia-e6f843b073/bin/../../src/support
> -I/home/xxx/Software/julia-e6f843b073/bin/../include -Isrc/clang-3.7.1/lib
> -Ibuild/clang-3.7.1/include -Isrc/clang-3.7.1/include
> -Isrc/llvm-3.7.1/include -Ibuild/llvm-3.7.1/include -DLLVM_NDEBUG -c
> ../src/bootstrap.cpp -o build/bootstrap.o
> ../src/bootstrap.cpp:19:35: fatal error: llvm/ADT/DenseMapInfo.h: No such
> file or directory
> compilation terminated.
> BuildBootstrap.Makefile:131: recipe for target 'build/bootstrap.o' failed
> make: *** [build/bootstrap.o] Error 1
> =================================[ ERROR: Cxx
> ]=================================
>
> LoadError: failed process: Process(`make -j2 -f BuildBootstrap.Makefile
> BASE_JULIA_HOME=/home/xxx/Software/julia-e6f843b073/bin`, ProcessExited(2))
> [2]
> while loading /home/xxx/.julia/v0.5/Cxx/deps/build.jl, in expression
> starting on line 31
>
>
> ================================================================================
>
> ================================[ BUILD ERRORS
> ]================================
>
> WARNING: Cxx had build errors.
>
> - packages with build errors remain installed in /home/xxx/.julia/v0.5
> - build the package(s) and all dependencies with `Pkg.build("Cxx")`
> - build a single package by running its `deps/build.jl` script
>
>
> ================================================================================
> INFO: Package database updated
>
> On Saturday, September 3, 2016 at 9:17:38 AM UTC+8, Steven G. Johnson
> wrote:
>>
>>
>>
>> On Friday, September 2, 2016 at 8:51:21 PM UTC-4, K leo wrote:
>>>
>>> While the majority of my analytics are in Julia, I will need to use an
>>> external event handling API which is implemented in C++. It looks that I
>>> have two options: 1) write the main code in C++ with the API and call Julia
>>> function for analytics; 2) write the main code also in Julia that work
>>> seamlessly with my analytics and call the C++ API for events.
>>>
>>> Which would be the better path in terms of ease of coding and
>>> performance?
>>>
>>
>> Much easier to call C++ from Julia, particularly with the Cxx.jl package
>> <https://github.com/Keno/Cxx.jl>. Performance-wise, it shouldn't
>> matter, but it is always easier to write glue code in a higher-level
>> language than in a lower-level language.
>>
>
