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26 lines
1.4 KiB
CMake
26 lines
1.4 KiB
CMake
if (CMAKE_BUILD_TYPE_UC STREQUAL "DEBUG")
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# Enable libcxx debug mode: https://releases.llvm.org/15.0.0/projects/libcxx/docs/DesignDocs/DebugMode.html
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# The docs say the debug mode violates complexity guarantees, so do this only for Debug builds.
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# set (CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -D_LIBCPP_ENABLE_DEBUG_MODE=1")
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# ^^ Crashes the database upon startup, needs investigation.
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# Besides that, the implementation looks like a poor man's MSAN specific to libcxx. Since CI tests MSAN
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# anyways, we can keep the debug mode disabled.
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# Libcxx also provides extra assertions:
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# --> https://releases.llvm.org/15.0.0/projects/libcxx/docs/UsingLibcxx.html#assertions-mode
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# These look orthogonal to the debug mode but the debug mode enables them implicitly:
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# --> https://github.com/llvm/llvm-project/blob/release/15.x/libcxx/include/__assert#L29
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# They are cheap and straightforward, so enable them in debug builds:
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set (CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -D_LIBCPP_ENABLE_ASSERTIONS=1")
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# TODO Once we upgrade to LLVM 18+, reconsider all of the above as they introduced "hardening modes":
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# https://libcxx.llvm.org/Hardening.html
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endif ()
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add_subdirectory(contrib/libcxxabi-cmake)
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add_subdirectory(contrib/libcxx-cmake)
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# Exception handling library is embedded into libcxxabi.
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target_link_libraries(global-libs INTERFACE cxx cxxabi)
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