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Bump fmt to 12.1.0 to fix xcode 26.4#56099

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leotm:patch-7
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Bump fmt to 12.1.0 to fix xcode 26.4#56099
leotm wants to merge 1 commit intofacebook:mainfrom
leotm:patch-7

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@leotm leotm commented Mar 14, 2026

Summary:

Follow-up to

TODO

  • bump packages/react-native/third-party-podspecs/fmt.podspec
  • bump scripts/releases/ios-prebuild/configuration.js
  • packages/rn-tester/Podfile.lock
    • rn-rester (main) ios not building on Xcode 26.3, needs fixing first
  • packages/react-native/third-party-podspecs/RCT-Folly.podspec
  • packages/react-native/gradle/libs.versions.toml

Ref: https://github.com/search?q=repo%3Afacebook%2Freact-native+%2211.0.2%22&type=code

OR bump via folly 2025.11.03.00 or 2026.03.09.00 instead

however unable to test rn-tester, ios doesn't seem to build on Xcode 26.3 let alone 26.4b
not tested previous versions of Xcode
not tested prior branches/tags to main

rn-tester CI is passing on macos-15 Xcode 16.4.0 only

Resolve: #55601

Changelog:

[General][Changed] Bump fmt to 12.1.0 to fix Xcode 26.4

Test Plan:

RNTester

@meta-cla meta-cla 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 Mar 14, 2026
@leotm leotm changed the title Update fmt library version to 12.1.0 Bump fmt to 12.1.0 Mar 14, 2026
@leotm leotm changed the title Bump fmt to 12.1.0 Bump fmt to 12.1.0 to fix xcode 26.4 Mar 14, 2026
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Successfully merging this pull request may close these issues.

Xcode 26.4b1/b2/b3 • FMT Compile Errors (it needs upgrading) • REPRO **IS** included despite the erroneous label

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