# Cxx.jl Compatability with Julia 1.5+
**URL:** https://discourse.julialang.org/t/cxx-jl-compatability-with-julia-1-5/53782
**Category:** Maker
**Tags:** question, package, cxx, development, devdiscussion
**Created:** [January 22, 2021, 1:49pm UTC](https://discourse.julialang.org/t/cxx-jl-compatability-with-julia-1-5/53782 "2021-01-22T13:49:08Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@cadojo](https://discourse.julialang.org/u/cadojo)
#### Post date: [January 22, 2021, 1:49pm UTC](https://discourse.julialang.org/t/cxx-jl-compatability-with-julia-1-5/53782/1 "2021-01-22T13:49:08Z")
The package [Cxx.jl](https://JuliaInterop/Cxx.jl) seems to be partially compatible with Julia 1.3, and not compatible with Julia 1.5+ (as referenced by [this discourse post](https://discourse.julialang.org/t/how-to-get-libllvm-9-0-1-so-on-ubuntu-18-04-required-by-cxx-package/40950) and [#464](https://github.com/JuliaInterop/Cxx.jl/issues/464#issuecomment-622226826)).
Does Julia 1.5 introduce permanent incompatibilities with a project like Cxx.jl? Or is this a fix-able problem?
I’d be interested in helping contribute, but I wasn’t sure where to begin or where the incompatibilities lie, so I figured I’d post here to start.
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### Author:  [@Gnimuc](https://discourse.julialang.org/u/Gnimuc)
#### Post date: [January 23, 2021, 12:27pm UTC](https://discourse.julialang.org/t/cxx-jl-compatability-with-julia-1-5/53782/2 "2021-01-23T12:27:52Z")
> [@cadojo](#):
>
> Does Julia 1.5 introduce permanent incompatibilities with a project like Cxx.jl?
For example, `jl_get_llvmf_decl` used in Cxx.jl [here](https://github.com/JuliaInterop/Cxx.jl/blob/ce1bbf4a79d348252f07f8a5774e90da75ebbf44/src/cxxstr.jl#L107) was removed from Julia in [this PR](https://github.com/JuliaLang/julia/commit/3b53f54a5e612cfc402f561d71cdbfb40da3529e#diff-62cfb2606c6a323a7f26a3eddfa0bf2b819fa33e094561fee09daeb328e3a1e7L1670).
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### Author:  [@carstenbauer](https://discourse.julialang.org/u/carstenbauer)
#### Post date: [January 23, 2021, 12:58pm UTC](https://discourse.julialang.org/t/cxx-jl-compatability-with-julia-1-5/53782/3 "2021-01-23T12:58:27Z")
My understanding is that unless your name is Keno it’s practically unfixable 😃
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### Author:  [@Gnimuc](https://discourse.julialang.org/u/Gnimuc)
#### Post date: [January 23, 2021, 1:00pm UTC](https://discourse.julialang.org/t/cxx-jl-compatability-with-julia-1-5/53782/4 "2021-01-23T13:00:51Z")
😅 I hope there will be more people who would like to get involved in the maintenance of Cxx.jl.
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### Author:  [@hxiong](https://discourse.julialang.org/u/hxiong)
#### Post date: [January 23, 2021, 6:11pm UTC](https://discourse.julialang.org/t/cxx-jl-compatability-with-julia-1-5/53782/5 "2021-01-23T18:11:06Z")
I am happy to contribute to Cxx.jl. I know enough C++ to be comfortable with details of C++ parsing.
I have been looking at the source code of Cxx.jl. My current thinking is that we need to get source build working first, and the first step is enabling CMake as a build tool for building libcxxffi. The reason I would like to enable CMake is that:
1. CMake is the standard build tool for C++, for better or worse
2. CMake can enable cross-platform compiling, potentially making Cxx.jl multi-platform
3. CMake will make building against and linking to LLVM and Julia easier because LLVM uses CMake and there is a CMake module in brutus project for linking to Julia.
I am just getting into this, so this is preliminary.
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### Author:  [@Gnimuc](https://discourse.julialang.org/u/Gnimuc)
#### Post date: [January 24, 2021, 1:55am UTC](https://discourse.julialang.org/t/cxx-jl-compatability-with-julia-1-5/53782/6 "2021-01-24T01:55:11Z")
Yep. We love CMake. The binary-build uses the following CMakeLists.txt.
[https://github.com/Gnimuc/CxxBuilder/blob/master/libcxxffi/CMakeLists.txt](https://github.com/Gnimuc/CxxBuilder/blob/master/libcxxffi/CMakeLists.txt)
[https://github.com/Gnimuc/CxxBuilder/blob/master/build\_tarballs.jl](https://github.com/Gnimuc/CxxBuilder/blob/master/build_tarballs.jl)
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### Author:  [@ktushar14](https://discourse.julialang.org/u/ktushar14)
#### Post date: [May 24, 2021, 8:49pm UTC](https://discourse.julialang.org/t/cxx-jl-compatability-with-julia-1-5/53782/7 "2021-05-24T20:49:33Z")
Hello, what’s the status of the compatibility of Cxx.jl with Julia 1.5+? I’m using Julia 1.5.3 and want to use a shared C++ library in Julia.
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### Author:  [@Gnimuc](https://discourse.julialang.org/u/Gnimuc)
#### Post date: [May 25, 2021, 4:57am UTC](https://discourse.julialang.org/t/cxx-jl-compatability-with-julia-1-5/53782/8 "2021-05-25T04:57:52Z")
Please use `CxxWrap` instead. AFAICT, there is no plan to fix the compatibility issues for Julia 1.5.