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The macos xcrun command officiall only supports --sdk, but in practice also -sdk works, and may be used by some (e.g. Julia's build system...)
This was referenced Feb 15, 2026
giordano
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fingolfin
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The officially supported argument is --sdk, not -sdk, though it seems the later also works in practice. But with BinaryBuilder, we use a 'fake' xcrun script which only supports the officially documented argument name. I've also submitted a [PR to let BinaryBuilderBase.jl accept this](JuliaPackaging/BinaryBuilderBase.jl#464); but I think it's wise for us to stick to the officially documented options.
KristofferC
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The officially supported argument is --sdk, not -sdk, though it seems the later also works in practice. But with BinaryBuilder, we use a 'fake' xcrun script which only supports the officially documented argument name. I've also submitted a [PR to let BinaryBuilderBase.jl accept this](JuliaPackaging/BinaryBuilderBase.jl#464); but I think it's wise for us to stick to the officially documented options. (cherry picked from commit 4820747)
KristofferC
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The officially supported argument is --sdk, not -sdk, though it seems the later also works in practice. But with BinaryBuilder, we use a 'fake' xcrun script which only supports the officially documented argument name. I've also submitted a [PR to let BinaryBuilderBase.jl accept this](JuliaPackaging/BinaryBuilderBase.jl#464); but I think it's wise for us to stick to the officially documented options. (cherry picked from commit 4820747)
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The macos xcrun command officiall only supports --sdk, but in practice also -sdk works, and may be used by some (e.g. Julia's build system...).
I've also submitted a fix to Julia but I think it's wise to be defensive here, as other projects may be also using this.