Julia [FreeBSD WIKI]

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Julia is a high-level, high-performance dynamic language for technical computing.
The main homepage for Julia can be found at [[https://julialang.org|julialang.org]].

The port for %%FreeBSD%% is available at [[https://www.freshports.org/lang/julia|lang/julia]].
This page will record related ecosystem between %%FreeBSD%% and Julia.

===== Port Installation Options =====

We provide two options for building self-shipped libraries

  * ''%%ARPACK%%'': This is off by default. Julia requires ''%%math/arpack-ng%%'' as its dependency. If you have some ports require ''%%math/arpack%%'', which conflict with ''%%math/arpack-ng%%'', you can enable this option to build private library without involving ''%%math/arpach-ng%%'' port build. 

  * ''%%LLVM%%'': This is off by default. Julia v0.6 requires ''%%devel/llvm39%%'' as its dependency. If a Julia package requires private ''%%libLLVM%%'' built (e.g. [[https://github.com/maleadt/LLVM.jl|LLVM.jl]]), you can enable this option to build private ''%%libLLVM%%''. The private ''%%libLLVM%%'' might contain some extra patches backported from LLVM upstream, in order to deal with special need of Julia's ecosystem, e.g. 'loading different version of ''%%libLLVM%%'' simultaneously', 'some NVPTX fix from upstream', ...etc. 

===== Install a Package Required Native Extension =====

The package manager of julia v0.6 is ''%%Pkg%%'', which is part of standard library.
If a package requires one or more native extensions, like C or Fortran libraries,
''%%Pkg.install("...")%%'' will invoke the ''%%Pkg.build("...")%%'', then it will spawn a
standalone julia process with the script ''%%deps/build.jl%%''.

Usually, ''%%build.jl%%'' script relies on [[https://github.com/JuliaLang/BinDeps.jl|BinDeps.jl]]
to

  - Checks the availability of native libraries.

  - If not available, manage to install prebuilt binary via OS's package manager (Note that current implementation (ps. when I write down these words, it's v0.8.8) will invoke ''%%sudo%%'').

  - If not prebuilt binary available, manage to build from source.

  - Otherwise, ''%%Pkg.build%%'' throws exception of build failure.

Since %%BinDeps%%.jl v0.6.0, %%FreeBSD%%'s package manager ''%%pkg%%'' has been supported
(see [[https://github.com/JuliaLang/BinDeps.jl/pull/296]]).
There is a julia struct ''%%BSDPkg%%'' to provide related features.

==== Example Usage of BinDeps ====

If you run into similar issue of installing native libraries, please checkout these patches.

  * HDF5.jl: https://github.com/JuliaIO/HDF5.jl/blob/e51e2795fface3f413857d1ce24b722da1523ce9/deps/build.jl#L26

  * Tk.jl: https://github.com/JuliaGraphics/Tk.jl/pull/142

===== Slack Channel =====

There is a ''%%#freebsd%%'' slack channel on [[https://julialang.slack.com|julialang.slack.com]].
This is a public slack, you can get invitation from [[https://slackinvite.julialang.org|https://slackinvite.julialang.org]].

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{{tag>Ports Team}}