cmake HAVE_LIBUNWIND examples

Lewuathe/mlir-hello thirdparty/llvm-project/libcxx/src/CMakeLists.txt :231 

elseif (TARGET unwind_shared OR HAVE_LIBUNWIND)

gnuradio/gnuradio cmake/Modules/Findlibunwind.cmake :36 

set_target_properties(
        libunwind::libunwind
        PROPERTIES INTERFACE_COMPILE_DEFINITIONS HAVE_LIBUNWIND
                   INTERFACE_INCLUDE_DIRECTORIES "${libunwind_INCLUDE_DIRS}"
                   INTERFACE_LINK_LIBRARIES "${libunwind_LIBRARIES}")

CTSRD-CHERI/cheribsd contrib/subrepo-cheri-libc++/src/CMakeLists.txt :252 

elseif (TARGET unwind_shared OR HAVE_LIBUNWIND)

PlatONnetwork/pWASM libc++/libcxx/lib/CMakeLists.txt :99 

elseif (LIBCXXABI_ENABLE_STATIC_UNWINDER AND (TARGET unwind_static OR HAVE_LIBUNWIND))