Add --rosetta option for arm64 images#846
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dcantah merged 1 commit intoapple:mainfrom Nov 9, 2025
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dcantah
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This LGTM (and think it's useful), but some other folks may have differing opinions. Will leave open for one other set of eyes
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Thank you this. It is incredibly helpful for scenarios where I use buildroot and yocto at work. |
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Going to check this in. We can always revert if we find an issue or anyone has concerns on the ux. |
saehejkang
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`container` automatically enables Rosetta for amd64 containers. This change allows Rosetta to be enabled for arm64 containers by passing the `--rosetta` flag. This allows native containers to benefit from being able to execute the occasional amd64 executable in niche situations, e.g., containers used for cross-compilation. Resolves apple#391. I considered adding a warning for passing `--rosetta` when it is not necessary, but there wasn't obvious infrastructure for conveying the
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Type of Change
Motivation and Context
containerautomatically enables Rosetta for amd64 containers. This change allows Rosetta to be enabled for arm64 containers by passing the--rosettaflag. This allows native containers to benefit from being able to execute the occasional amd64 executable in niche situations, e.g., containers used for cross-compilation.Resolves #391.
I considered adding a warning for passing
--rosettawhen it is not necessary, but there wasn't obvious infrastructure for conveying the message.Testing
I tested by downloading a statically linked x86 binary and running it inside an arm64 Alpine container created with the new
--rosettaflag.I attempted to write a test case but I hit this issue with my Swift toolchain. An ideal test case might involve actually executing an amd64 binary within an arm64 container, but I didn't come up with a simple way to do so.