![]() We’ve used the AS keyword on the FROM line to identify this stage of the build so we can refer to in subsequent stages. The first section of the Dockerfile describes the build environment for our application. ![]() LABEL description="Run container - findfaces"ĬOPY -from=build /src/haarcascade_frontalface_alt2.xml /usr/local/faces/haarcascade_frontalface_alt2.xmlĬOPY -from=build /src/out/findfaces /usr/local/faces/findfaces DCMAKE_TOOLCHAIN_FILE=/tmp/vcpkg/scripts/buildsystems/vcpkg.cmake -DVCPKG_TARGET_TRIPLET=圆4-linux-musl \ tmp/vcpkg/vcpkg install boost-asio boost-filesystem fmt http-parser opencv restinio bootstrap-vcpkg.sh -useSystemBinariesĬOPY 圆4-linux-musl.cmake /tmp/vcpkg/triplets/ LABEL description="Build container - findfaces"Īutoconf build-base binutils cmake curl file gcc g git libgcc libtool linux-headers make musl-dev ninja tar unzip wget Here is a complete multi-stage Dockerfile that produces a build container for compiling the application, followed by a runtime container that takes that output and only has the dependencies necessary for running the application as opposed to building it. This is an app that exposes a service to receive an image, processes the image using OpenCV to circle any found faces, and exposes another endpoint to retrieve the processed image. Let’s look at a multi-stage build Dockerfile for a C app. To see a full example of before and after multi-stage builds were available I recommend looking at the official Docker multi-stage build documentation. Multi-stage builds are a lot more convenient than that approach and less fragile. This spread the definition of related containers across multiple Dockerfiles that were often driven together via scripts. Prior to the availability of this capability it was common to see build container definitions where output was copied to the host and later copied into deployment containers. You can also name your build stages and copy output from early stages into the later stages. Multi-stage builds are Dockerfiles that use multiple FROM statements where each begins a new stage of the build. ![]() This is relevant to anyone doing C development regardless what tools you are using. ![]() This post will show you how you can leverage the capabilities of multi-stage containers for your C development. Unfortunately, it is hard to find guidance on how to use newer techniques like multi-stage builds. It’s fairly easy to find Dockerfiles that provide various C environments. I tried various simple things like trying to include But that didn't work.Updated January 10, 2020: Corrected link to article source that was broken by refactoring in the repo.Ĭontainers are a great tool for configuring reproducible build environments. However i am getting a bunch of linker errors in the terminal : Starting build.ĭ:\mingw64\bin\g .exe -fdiagnostics-color=always -g -I D:\boost\boost_1_82_0 So i am trying to compile the absolute basic ASIO tutorial code as given here
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