add cxxwrap1

cxxwrap1/.gitignore

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+libhello*

cxxwrap1/Dockerfile

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+FROM julia:1.10.3
+
+RUN apt-get update && apt-get install -y --no-install-recommends g++ \
+    && apt-get clean && rm -rf /var/lib/apt/lists/*
+
+RUN julia -e 'using Pkg; Pkg.add("CxxWrap"); Pkg.precompile()'

cxxwrap1/Manifest.toml

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+# This file is machine-generated - editing it directly is not advised
+
+julia_version = "1.10.3"
+manifest_format = "2.0"
+project_hash = "1b0a6b6d81b3045788b43b329bfad98437353c80"
+
+[[deps.Artifacts]]
+uuid = "56f22d72-fd6d-98f1-02f0-08ddc0907c33"
+
+[[deps.Base64]]
+uuid = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
+
+[[deps.CxxWrap]]
+deps = ["Libdl", "MacroTools", "libcxxwrap_julia_jll"]
+git-tree-sha1 = "ba1a559afd562447710513525030d6ad83e5868a"
+uuid = "1f15a43c-97ca-5a2a-ae31-89f07a497df4"
+version = "0.15.1"
+
+[[deps.Dates]]
+deps = ["Printf"]
+uuid = "ade2ca70-3891-5945-98fb-dc099432e06a"
+
+[[deps.JLLWrappers]]
+deps = ["Artifacts", "Preferences"]
+git-tree-sha1 = "7e5d6779a1e09a36db2a7b6cff50942a0a7d0fca"
+uuid = "692b3bcd-3c85-4b1f-b108-f13ce0eb3210"
+version = "1.5.0"
+
+[[deps.Libdl]]
+uuid = "8f399da3-3557-5675-b5ff-fb832c97cbdb"
+
+[[deps.MacroTools]]
+deps = ["Markdown", "Random"]
+git-tree-sha1 = "2fa9ee3e63fd3a4f7a9a4f4744a52f4856de82df"
+uuid = "1914dd2f-81c6-5fcd-8719-6d5c9610ff09"
+version = "0.5.13"
+
+[[deps.Markdown]]
+deps = ["Base64"]
+uuid = "d6f4376e-aef5-505a-96c1-9c027394607a"
+
+[[deps.Preferences]]
+deps = ["TOML"]
+git-tree-sha1 = "9306f6085165d270f7e3db02af26a400d580f5c6"
+uuid = "21216c6a-2e73-6563-6e65-726566657250"
+version = "1.4.3"
+
+[[deps.Printf]]
+deps = ["Unicode"]
+uuid = "de0858da-6303-5e67-8744-51eddeeeb8d7"
+
+[[deps.Random]]
+deps = ["SHA"]
+uuid = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
+
+[[deps.SHA]]
+uuid = "ea8e919c-243c-51af-8825-aaa63cd721ce"
+version = "0.7.0"
+
+[[deps.TOML]]
+deps = ["Dates"]
+uuid = "fa267f1f-6049-4f14-aa54-33bafae1ed76"
+version = "1.0.3"
+
+[[deps.Unicode]]
+uuid = "4ec0a83e-493e-50e2-b9ac-8f72acf5a8f5"
+
+[[deps.libcxxwrap_julia_jll]]
+deps = ["Artifacts", "JLLWrappers", "Libdl"]
+git-tree-sha1 = "0f10092db771939e29fd13a67967f5c63212fdfe"
+uuid = "3eaa8342-bff7-56a5-9981-c04077f7cee7"
+version = "0.12.3+0"

cxxwrap1/Project.toml

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+[deps]
+CxxWrap = "1f15a43c-97ca-5a2a-ae31-89f07a497df4"

cxxwrap1/README.md

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+# Usage
+
+```
+$ docker build -t cxxwrap1 .
+$ docker run --rm -it -v $PWD:/work -w /work cxxwrap1 bash -c 'bash build.sh && julia callcxx.jl'
+```
+
+# Reference
+
+[my gist](https://gist.github.com/terasakisatoshi/b6a7121cd570f6739992345095b07d62)

cxxwrap1/build.sh

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+JL=`julia -e 'joinpath(Sys.BINDIR, "..") |> abspath |> print'`
+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

cxxwrap1/callcxx.jl

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+# 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()

cxxwrap1/hello.cpp

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+#include <string>
+
+#include "jlcxx/jlcxx.hpp"
+
+std::string greet()
+{
+   return "hello, world";
+}
+
+JLCXX_MODULE define_julia_module(jlcxx::Module& mod)
+{
+  mod.method("greet", &greet);
+}