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[CMake] Disable -Wdangling-reference warnings on GCC #157541

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Merged
merged 1 commit into from
Sep 9, 2025
Merged

[CMake] Disable -Wdangling-reference warnings on GCC #157541

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8 changes: 8 additions & 0 deletions llvm/cmake/modules/HandleLLVMOptions.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -889,6 +889,14 @@ if (LLVM_ENABLE_WARNINGS AND (LLVM_COMPILER_IS_GCC_COMPATIBLE OR CLANG_CL))
endif()
endif()

# Disable -Wdangling-reference, a C++-only warning from GCC 13 that seems
# to produce a large number of false positives.
if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 13.1)
append("-Wno-dangling-reference" CMAKE_CXX_FLAGS)
endif()
endif()

# Disable -Wredundant-move and -Wpessimizing-move on GCC>=9. GCC wants to
# remove std::move in code like
# "A foo(ConvertibleToA a) { return std::move(a); }",
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