feat: Build with Alpine for static Linux binaries #42
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Here's a full CI run with the modified workflow: https://github.com/shaka-project/static-ffmpeg-binaries/actions/runs/11263885133 |
This uses an Alpine Linux container to build truly static Linux binaries that do not depend on glibc at runtime. Alpine uses musl instead of glibc, which enables this fully static build. With musl compiler wrappers in Ubuntu, you still end up importing glibc references through libstdc++. And since x265 uses C++, we can't eliminate these in Ubuntu without dropping HEVC support. Using Alpine, with its musl-native environment, allows us to avoid glibc and build fully static Linux binaries. Closes #28
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| # NOTE: disable OpenCL-based features because it uses dlopen and can interfere | ||
| # with static builds. | ||
| ./configure \ | ||
| --disable-opencl \ |
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Q, so builds with these configurations aren't static anymore or the does building fail all together?
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They aren't really static, since it uses dlopen to find OpenCL at runtime. Also, OpenCL isn't necessary for the H264 software codec.
| container: | ||
| image: ${{ matrix.container }} | ||
| # Access to the host filesystem is required to patch the environment for | ||
| # Alpine Linux support. See the first Alpine step below for details. |
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how things go when the matrix entry doesn't define a container? couldn't find it in github CI docs, but it seems to play nicely as we have green check marks on other platforms and the binaries are uploaded.
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I found that it just doesn't run in a container when image is blank. So this works nicely with the build matrix, and allows us to put some builds in containers and others not.
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This uses an Alpine Linux container to build truly static Linux binaries that do not depend on glibc at runtime.
Alpine uses musl instead of glibc, which enables this fully static build. With musl compiler wrappers in Ubuntu, you still end up importing glibc references through libstdc++. And since x265 uses C++, we can't eliminate these in Ubuntu without dropping HEVC support. Using Alpine, with its musl-native environment, allows us to avoid glibc and build fully static Linux binaries.
Closes #28