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Restore RCT_NEW_ARCH_ENABLED semantics for backward compatibility #42259

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Summary:
At the end of last year, we reduce build fragmentation in iOS making sure that we were always building both architecture.
In the process, we break the semantic od RCt_NEW_ARCH_ENABLED flag, making several libs stop working in one of the two archs.

This change should restore the semantic, so libraries that were using RCT_NEW_ARCH_ENABLED to run conditional code will still work in the same way. While doing so, I also removed the new USE_NEW_ARCH as we don't want unnecessary flags

CHANGELOG:

[iOS][Fixed] - Bring the old RCT_NEW_ARCH_ENABLED semantic back for compatibility

Differential Revision: D52727792

@facebook-github-bot facebook-github-bot added the CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. label Jan 12, 2024
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This pull request was exported from Phabricator. Differential Revision: D52727792

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analysis-bot commented Jan 12, 2024

Platform Engine Arch Size (bytes) Diff
android hermes arm64-v8a 16,795,429 +3
android hermes armeabi-v7a n/a --
android hermes x86 n/a --
android hermes x86_64 n/a --
android jsc arm64-v8a 20,186,620 -3
android jsc armeabi-v7a n/a --
android jsc x86 n/a --
android jsc x86_64 n/a --

Base commit: 0dd27f2
Branch: main

cipolleschi added a commit to cipolleschi/react-native that referenced this pull request Jan 12, 2024
…cebook#42259)

Summary:

At the end of last year, we reduce build fragmentation in iOS making sure that we were always building both architecture.
In the process, we break the semantic od RCt_NEW_ARCH_ENABLED flag, making several libs stop working in one of the two archs.

This change should restore the semantic, so libraries that were using RCT_NEW_ARCH_ENABLED to run conditional code will still work in the same way. While doing so, I also removed the new USE_NEW_ARCH as we don't want unnecessary flags

## CHANGELOG:
[iOS][Fixed] - Bring the old RCT_NEW_ARCH_ENABLED semantic back for compatibility

Differential Revision: D52727792
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This pull request was exported from Phabricator. Differential Revision: D52727792

cipolleschi added a commit to cipolleschi/react-native that referenced this pull request Jan 12, 2024
…cebook#42259)

Summary:

At the end of last year, we reduce build fragmentation in iOS making sure that we were always building both architecture.
In the process, we break the semantic od RCt_NEW_ARCH_ENABLED flag, making several libs stop working in one of the two archs.

This change should restore the semantic, so libraries that were using RCT_NEW_ARCH_ENABLED to run conditional code will still work in the same way. While doing so, I also removed the new USE_NEW_ARCH as we don't want unnecessary flags

## CHANGELOG:
[iOS][Fixed] - Bring the old RCT_NEW_ARCH_ENABLED semantic back for compatibility

Reviewed By: cortinico

Differential Revision: D52727792
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This pull request was exported from Phabricator. Differential Revision: D52727792

…cebook#42259)

Summary:

At the end of last year, we reduce build fragmentation in iOS making sure that we were always building both architecture.
In the process, we break the semantic od RCt_NEW_ARCH_ENABLED flag, making several libs stop working in one of the two archs.

This change should restore the semantic, so libraries that were using RCT_NEW_ARCH_ENABLED to run conditional code will still work in the same way. While doing so, I also removed the new USE_NEW_ARCH as we don't want unnecessary flags

## CHANGELOG:
[iOS][Fixed] - Bring the old RCT_NEW_ARCH_ENABLED semantic back for compatibility

Reviewed By: cortinico

Differential Revision: D52727792
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This pull request was exported from Phabricator. Differential Revision: D52727792

@facebook-github-bot facebook-github-bot added the Merged This PR has been merged. label Jan 12, 2024
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This pull request has been merged in 3690e44.

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3 participants