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Provide a minimum OS version for MachO objects #8323

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merged 2 commits into from
Jun 25, 2024
Merged

Provide a minimum OS version for MachO objects #8323

merged 2 commits into from
Jun 25, 2024

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alexreinking
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This gives LLVM enough information to generate a "platform load-command" in the MachO object file.

Frustratingly, there is not a simple API that sets this directly; it must be passed in the os name.

Fixes #7941

@alexreinking alexreinking marked this pull request as ready for review June 25, 2024 17:17
steven-johnson
steven-johnson approved these changes Jun 25, 2024
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LGTM but please add a comment echoing the info in the PR description.

@alexreinking
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Done! As I'm thinking about this, we should probably do something similar for iOS

@alexreinking
Provide a minimum OS version for MachO objects
6cb4d84 
This gives LLVM enough information to generate a
"platform load-command" in the object file.

Fixes #7941
@alexreinking
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@steven-johnson -- I changed the approach to use the LLVM-computed minimum compatible version (e.g. 11 on macOS/ARM). This should generalize to iOS, watchOS, tvOS, etc.

@alexreinking alexreinking changed the title Provide a minimum OS version (11) for ARM/macOS Provide a minimum OS version for MachO objects Jun 25, 2024
@alexreinking alexreinking merged commit 9b703f3 into main Jun 25, 2024
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@alexreinking alexreinking deleted the issues/7941-macho-warnings branch June 26, 2024 13:08
@steven-johnson
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I think this may have injected a link error in google when building for the iOS Simulator (which is not considered macOS by the linker), but I don't have time to diagnose before leaving for vacation -- hoping @vksnk can look at it next week

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vksnk commented Jul 9, 2024

Yes, can confirm this is causing a link error like:

ld64.lld: error: _some_binary_name_ has platform macOS, which is different from target platform iOS Simulator

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Yes, can confirm this is causing a link error like:

ld64.lld: error: _some_binary_name_ has platform macOS, which is different from target platform iOS Simulator

Well, that is vexing... can you try printing the LLVM target's OSName before and after the snippet here that injects the version information? I wonder if iOS is somehow being clobbered into macOS?

@BrewTestBot BrewTestBot mentioned this pull request Jul 17, 2024
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@steven-johnson steven-johnson steven-johnson approved these changes

@abadams abadams Awaiting requested review from abadams

@derek-gerstmann derek-gerstmann Awaiting requested review from derek-gerstmann

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[macos] XCode 15 issues warnings for object files when linking
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@alexreinking @steven-johnson @vksnk