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Disable objc_msgSend stubs in static libs to maintain Xcode < 14 compat

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Xcode 14's Clang will emit objc_msgSend stubs by default, which ld from
earlier Xcode versions will fail to understand. Disable these stubs
explicitly for static libs, for as long as we support Xcode < 14.

 See https://github.com/llvm/llvm-project/issues/56034

Pick-to: 6.5
Fixes: QTBUG-112820
Change-Id: Id762873d61b9d147bf3eb6292297e7b80b7393e1
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
This commit is contained in:
Tor Arne Vestbø 2023-04-13 14:17:31 +02:00
parent 4fb7eebc70
commit c91ae574ed
1 changed files with 15 additions and 0 deletions
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15
cmake/QtInternalTargets.cmake
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@ -217,6 +217,21 @@ elseif(UIKIT)
target_compile_definitions(PlatformCommonInternal INTERFACE GLES_SILENCE_DEPRECATION)
endif()
if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "AppleClang"
AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "14.0.0"
)
# Xcode 14's Clang will emit objc_msgSend stubs by default, which ld
# from earlier Xcode versions will fail to understand when linking
# against static libraries with these stubs. Disable the stubs explicitly,
# for as long as we do support Xcode < 14.
set(is_static_lib "$<STREQUAL:$<TARGET_PROPERTY:TYPE>,STATIC_LIBRARY>")
set(is_objc "$<COMPILE_LANGUAGE:OBJC,OBJCXX>")
set(is_static_and_objc "$<AND:${is_static_lib},${is_objc}>")
target_compile_options(PlatformCommonInternal INTERFACE
"$<${is_static_and_objc}:-fno-objc-msgsend-selector-stubs>"
)
endif()
if(MSVC)
target_compile_definitions(PlatformCommonInternal INTERFACE
"_CRT_SECURE_NO_WARNINGS"