[llvm] [llvm][cmake] Try LLVM libunwind when frame registration is unavailable (PR #112087)
Lang Hames via llvm-commits
llvm-commits at lists.llvm.org
Fri Nov 1 11:47:55 PDT 2024
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@@ -272,6 +272,13 @@ endif()
check_symbol_exists(__register_frame "${CMAKE_CURRENT_LIST_DIR}/unwind.h" HAVE_REGISTER_FRAME)
check_symbol_exists(__deregister_frame "${CMAKE_CURRENT_LIST_DIR}/unwind.h" HAVE_DEREGISTER_FRAME)
check_symbol_exists(__unw_add_dynamic_fde "${CMAKE_CURRENT_LIST_DIR}/unwind.h" HAVE_UNW_ADD_DYNAMIC_FDE)
+if (NOT (HAVE_REGISTER_FRAME OR HAVE_DEREGISTER_FRAME OR HAVE_UNW_ADD_DYNAMIC_FDE))
+ check_library_exists(unwind __unw_add_dynamic_fde "" HAVE_LLVM_LIBUNWIND)
+ if (HAVE_LLVM_LIBUNWIND)
+ list(APPEND CMAKE_REQUIRED_LIBRARIES "unwind")
+ set(HAVE_UNW_ADD_DYNAMIC_FDE 1)
+ endif ()
+endif ()
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lhames wrote:
Is this BSD, or some other ELF-based system with libunwind as the default unwinder?
https://github.com/llvm/llvm-project/pull/112087
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