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macdeploy: alternative info to download the macOS SDK #22516

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Jul 29, 2021
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macdeploy: alternative info to download the macOS SDK #22516

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7 changes: 5 additions & 2 deletions contrib/macdeploy/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,10 @@ Our current macOS SDK
(`Xcode-12.1-12A7403-extracted-SDK-with-libcxx-headers.tar.gz`) can be
extracted from
[Xcode_12.1.xip](https://download.developer.apple.com/Developer_Tools/Xcode_12.1/Xcode_12.1.xip).
An Apple ID is needed to download this.
Alternatively, after logging in to your account go to 'Downloads', then 'More'
and look for [`Xcode_12.1`](https://download.developer.apple.com/Developer_Tools/Xcode_12.1/Xcode_12.1.xip).
An Apple ID and cookies enabled for the hostname are needed to download this.
The `sha256sum` of the archive should be `612443b1894b39368a596ea1607f30cbb0481ad44d5e29c75edb71a6d2cf050f`.

After Xcode version 7.x, Apple started shipping the `Xcode.app` in a `.xip`
archive. This makes the SDK less-trivial to extract on non-macOS machines. One
Expand Down Expand Up @@ -76,7 +79,7 @@ and its `libLTO.so` rather than those from `llvmgcc`, as it was originally done

To complicate things further, all builds must target an Apple SDK. These SDKs are free to
download, but not redistributable. To obtain it, register for an Apple Developer Account,
then download [Xcode_11.3.1](https://download.developer.apple.com/Developer_Tools/Xcode_11.3.1/Xcode_11.3.1.xip).
then download [Xcode_12.1](https://download.developer.apple.com/Developer_Tools/Xcode_12.1/Xcode_12.1.xip).

This file is many gigabytes in size, but most (but not all) of what we need is
contained only in a single directory:
Expand Down