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build: Properly link against the homebrew llvm libc++ library on macOS

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WerWolv
2025-12-05 19:26:09 +01:00
parent 4f4af83699
commit ab3853eb9d
1 changed files with 9 additions and 0 deletions
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9
cmake/build_helpers.cmake
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@@ -776,6 +776,15 @@ macro(setupCompilerFlags target)
if (CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND APPLE)
addCCXXFlag("-Wno-unknown-warning-option" ${target})
# On macOS, when using clang from Homebrew, properly setup the libc++ library path so
# it's using the one from Homebrew instead of the system one.
execute_process(COMMAND brew --prefix llvm OUTPUT_VARIABLE LLVM_PREFIX OUTPUT_STRIP_TRAILING_WHITESPACE)
if (NOT LLVM_PREFIX STREQUAL "" AND ${CMAKE_CXX_COMPILER} STREQUAL "${LLVM_PREFIX}/bin/clang++")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -L${LLVM_PREFIX}/lib/c++")
set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -L${LLVM_PREFIX}/lib/c++")
set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -L${LLVM_PREFIX}/lib/c++")
endif()
if (CMAKE_BUILD_TYPE STREQUAL "Debug")
add_compile_definitions(_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_DEBUG)
endif()