CxxWrap.jl

build.sh

JL="$(dirname "$(dirname `which julia`)")"
PREFIX=`julia -e 'using CxxWrap; CxxWrap.prefix_path() |> print'`

g++ -fPIC -shared -std=c++17 \
  -I${PREFIX}/include/ \
  -L${PREFIX}/lib/ \
  -I${JL}/include/julia \
  -L${JL}/lib \
  hello.cpp -o libhello.so

callcxx.jl

# Load the module and generate the functions
module CppHello
  using CxxWrap
  @wrapmodule(joinpath(".","libhello.so"))

  function __init__()
    @initcxx
  end
end

# Call greet and show the result
@show CppHello.greet()

Dockerfile

FROM julia:1.5.3

RUN apt-get update && apt-get install -y \
    build-essential


RUN julia -e 'using Pkg; Pkg.add("CxxWrap"); Pkg.precompile()'

hello.cpp

#include <string>

#include "jlcxx/jlcxx.hpp"

std::string greet()
{
   return "hello, world";
}

JLCXX_MODULE define_julia_module(jlcxx::Module& mod)
{
  mod.method("greet", &greet);
}

Usage

Install CxxWrap.jl via Julia's REPL: julia> using Pkg; Pkg.add("CxxWrap").
Then, simply run:
bash build.sh && julia callcxx.jl

Related Topics

https://gist.github.com/terasakisatoshi/163ab1fc3ff1adab340d221eae33d218

Usage (using Docker)

$ docker build -t jl .
$ docker run --rm -it -v $PWD:/work -w /work jl  bash -c 'bash build.sh && julia callcxx.jl'
CppHello.greet() = "hello, world"