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Helloworld: PE32+ executable (console ) x86-64, for MS WindowsĬhanging CROSS_TRIPLE to darwin (or non-alias triple x86_64-apple-darwin) will produce a binary for Mac OS X. $ docker run -v $PWD:/workdir -e CROSS_TRIPLE =windows multiarch/crossbuild make It contains a rich set of toolchains, provides “all-in-one” image (although it might be a bad thing for some, having to download ~1Gb image) and super easy to use! Here is an example: But that would bring a significant infrastructure overhead, and I decided to go to the most mystery place in the world - the Page Two of Google results ? I was about to start configuring our CI solution to build on 3 platforms and then aggregate it into a final JAR (I always wanted to try Concourse CI, it’s pipelines sound great for it, just take a look at this one: ). The Best Place to Hide a Dead Body is Page Two of Google
Is the darwin project cross platform how to#
But, unfortunatelly, I haven’t figured out how to use it with my use case, plus it is lacking Mac OS X support. When I clicked the link, I had this warm “A-ha, solved with Docker!” feeling. If you Google for “c++ Docker cross-compile”, most probably you will find this image: Although the idea was nice, I wasn’t sure that I can run everything inside a container without changing the development workflow. My first attempt (as well as my whining about C++, toolchains, Clang vs GCC, etc…) was observed by others who were sitting in DockerCon EU 2018’s speakers room, and Sune Keller was like: “Why don’t you run it in Docker?”. I will just leave it here: Second attempt - “Hey Google, what about Docker?” And, despire the fact that everyone is talking about “Clang” as an “easy to cross-compile” tool, my experience was far from “easy” word. You compile your C++ into something they call “Bitcode”, sounds almost like Java’s bytecode, right? Nope.Īpparently, Clang’s Bitcode is not really cross-platform, and even if you manage to compile into a “cross-platform” Bitcode, you still have to link it. Of course I started with “half-VM” solution, LLVM with Bitcode. First attempt - Clang, LLVM and all that Jazz And, since Googling didn’t really help, I decided to share my findings here. I did some C++ in the past but never thought how hard is it, to cross-compile a library for 3 major platforms (Windows, Linux and Mac), both locally and on CI environment (from where we perform the releases). I was working on a debugging tool for Project Reactor and part of it is implemented as a native library for Java, using JNI technology.
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But recently I got an interesting challenge to solve. As a JVM guy, I got used to “write once, run everywhere” paradigm.