[runtime] Adopt safer native compiler flags: Wcast-function-type-mismatch #24083

rolfbjarne · 2025-10-23T06:30:42Z

Example warning:

macios/runtime/trampolines.m:1784:9: error: cast from 'void *(*)(MonoObject *, void *, GCHandle *)' (aka 'void *(*)(_MonoObject *, void *, void **)') to 'xamarin_managed_to_id_func' (aka 'id (*)(_MonoObject *, void *, void **)') converts to incompatible function type [-Werror,-Wcast-function-type-mismatch]
 1784 |         return (xamarin_managed_to_id_func) xamarin_smart_enum_to_nsstring;
      |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

References:

Contributes towards #23023.

Example warning: ``` macios/runtime/xamarin/runtime.h:232:14: error: 'const' type qualifier on return type has no effect [-Werror,-Wignored-qualifiers] 232 | const char * const xamarin_get_original_working_directory_path (); ``` References: * https://developer.apple.com/documentation/xcode/enabling-enhanced-security-for-your-app * https://releases.llvm.org/8.0.0/tools/clang/docs/ReleaseNotes.html#major-new-features (for -ftrivial-auto-var-init=zero) Contributes towards #23023.

Example warning: ``` In file included from macios/appex-deduplicate-frameworks/macios/runtime/runtime.m:98: macios/runtime/delegates.inc:189:41: error: missing field 'register_assembly' initializer [-Werror,-Wmissing-field-initializers] 189 | static struct Delegates delegates = { 0 }; | ^ ``` References: * https://developer.apple.com/documentation/xcode/enabling-enhanced-security-for-your-app * https://releases.llvm.org/8.0.0/tools/clang/docs/ReleaseNotes.html#major-new-features (for -ftrivial-auto-var-init=zero) Contributes towards #23023.

…atch (#24072) Example warning: ``` macios/runtime/trampolines.m:1784:9: error: cast from 'void *(*)(MonoObject *, void *, GCHandle *)' (aka 'void *(*)(_MonoObject *, void *, void **)') to 'xamarin_managed_to_id_func' (aka 'id (*)(_MonoObject *, void *, void **)') converts to incompatible function type [-Werror,-Wcast-function-type-mismatch] 1784 | return (xamarin_managed_to_id_func) xamarin_smart_enum_to_nsstring; | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``` References: * https://developer.apple.com/documentation/xcode/enabling-enhanced-security-for-your-app * https://releases.llvm.org/8.0.0/tools/clang/docs/ReleaseNotes.html#major-new-features (for -ftrivial-auto-var-init=zero) Contributes towards #23023.

…ype-mismatch (#24072)" This reverts commit 294fa88.

…Wmissing-field-initializers

…atch Example warning: ``` macios/runtime/trampolines.m:1784:9: error: cast from 'void *(*)(MonoObject *, void *, GCHandle *)' (aka 'void *(*)(_MonoObject *, void *, void **)') to 'xamarin_managed_to_id_func' (aka 'id (*)(_MonoObject *, void *, void **)') converts to incompatible function type [-Werror,-Wcast-function-type-mismatch] 1784 | return (xamarin_managed_to_id_func) xamarin_smart_enum_to_nsstring; | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``` References: * https://developer.apple.com/documentation/xcode/enabling-enhanced-security-for-your-app * https://releases.llvm.org/8.0.0/tools/clang/docs/ReleaseNotes.html#major-new-features (for -ftrivial-auto-var-init=zero) Contributes towards #23023.

…Wcast-function-type-mismatch

vs-mobiletools-engineering-service2 · 2025-10-23T12:39:02Z

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vs-mobiletools-engineering-service2 · 2025-10-23T12:42:23Z

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vs-mobiletools-engineering-service2 · 2025-10-23T13:09:07Z

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vs-mobiletools-engineering-service2 · 2025-10-23T13:13:53Z

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vs-mobiletools-engineering-service2 · 2025-10-23T13:24:34Z

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vs-mobiletools-engineering-service2 · 2025-10-23T13:27:06Z

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vs-mobiletools-engineering-service2 · 2025-10-23T14:58:24Z

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rolfbjarne added 6 commits October 22, 2025 13:46

Revert "[runtime] Adopt safer native compiler flags: Wcast-function-t…

70c1d3b

…ype-mismatch (#24072)" This reverts commit 294fa88.

Merge remote-tracking branch 'origin/main' into dev/rolf/safer-flags-…

84be338

…Wmissing-field-initializers

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rolfbjarne changed the base branch from dev/rolf/safer-flags-Wmissing-field-initializers to main October 23, 2025 12:05

Merge remote-tracking branch 'origin/main' into dev/rolf/safer-flags-…

b0841dd

…Wcast-function-type-mismatch

rolfbjarne enabled auto-merge (squash) October 23, 2025 12:08

rolfbjarne merged commit 702b903 into main Oct 23, 2025
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rolfbjarne linked an issue Oct 28, 2025 that may be closed by this pull request

Look into new security features with Xcode 26 #23023

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[runtime] Adopt safer native compiler flags: Wcast-function-type-mismatch #24083

[runtime] Adopt safer native compiler flags: Wcast-function-type-mismatch #24083

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vs-mobiletools-engineering-service2 commented Oct 23, 2025

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✅ [CI Build #b0841dd] Build passed (Build macOS tests) ✅

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💻 [CI Build #b0841dd] Tests on macOS X64 - Mac Sonoma (14) passed 💻

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💻 [CI Build #b0841dd] Tests on macOS M1 - Mac Monterey (12) passed 💻

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💻 [CI Build #b0841dd] Tests on macOS arm64 - Mac Sequoia (15) passed 💻

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💻 [CI Build #b0841dd] Tests on macOS M1 - Mac Ventura (13) passed 💻

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💻 [CI Build #b0841dd] Tests on macOS arm64 - Mac Tahoe (26) passed 💻

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