Run import Pkg; Pkg.add("CxxWrap") to install the CxxWrap package.

Install julia on ubuntu by apt-get

sudo apt-get -yV install julia

OpenCV build errorlog

log

z.so;/usr/lib/x86_64-linux-gnu/libdl.so;/usr/lib/x86_64-linux-gnu/libm.so (found version "1.10.4")
-- Registering hook 'STATUS_DUMP_EXTRA': /usr/local/src/opencv_contrib/modules/julia/cmake/hooks/STATUS_DUMP_EXTRA.cmake
-- Found Julia executable: /usr/bin/julia
-- Julia_VERSION_STRING: 1.4.1
-- Julia_INCLUDE_DIRS:   /usr/include/julia
-- Julia_LIBRARY_DIR:    /usr/lib/x86_64-linux-gnu
-- Julia_LIBRARY:        /usr/lib/x86_64-linux-gnu/libjulia.so.1
-- JULIA_HOME:           /usr/bin
-- Julia_LLVM_VERSION:   v8.0.1
-- Julia_WORD_SIZE:      64
-- Found Julia: /usr/lib/x86_64-linux-gnu/libjulia.so.1 (found version "1.4.1")
ERROR: ArgumentError: Package CxxWrap not found in current path:
- Run `import Pkg; Pkg.add("CxxWrap")` to install the CxxWrap package.

)


$ Julia
julia> import Pkg
julia> Pkg.add("CxxWrap")
    Cloning default registries into `~/.julia`
    Cloning registry from "https://github.com/JuliaRegistries/General.git"
      Added registry `General` to `~/.julia/registries/General`
  Resolving package versions...
  Installed libcxxwrap_julia_jll q v0.8.0+0
  Installed CxxWrap qqqqqqqqqqqqqq v0.11.0
  Installed MacroTools qqqqqqqqqqq v0.5.6
Downloading artifact: libcxxwrap_julia
   Updating `~/.julia/environments/v1.4/Project.toml`
  [1f15a43c] + CxxWrap v0.11.0
   Updating `~/.julia/environments/v1.4/Manifest.toml`
  [1f15a43c] + CxxWrap v0.11.0
  [1914dd2f] + MacroTools v0.5.6
  [3eaa8342] + libcxxwrap_julia_jll v0.8.0+0
  [2a0f44e3] + Base64
  [ade2ca70] + Dates
  [b77e0a4c] + InteractiveUtils
  [76f85450] + LibGit2
  [8f399da3] + Libdl
  [56ddb016] + Logging
  [d6f4376e] + Markdown
  [44cfe95a] + Pkg
  [de0858da] + Printf
  [3fa0cd96] + REPL
  [9a3f8284] + Random
  [ea8e919c] + SHA
  [9e88b42a] + Serialization
  [6462fe0b] + Sockets
  [cf7118a7] + UUIDs
  [4ec0a83e] + Unicode
julia>

cmake

cmake \
-DWITH_JULIA=ON \
-DJlCxx_DIR=~/.julia/registries/General \
..