cmake COMPILER_RT_HAS_LIBEXECINFO examples

Lewuathe/mlir-hello thirdparty/llvm-project/compiler-rt/cmake/config-ix.cmake :194 

check_library_exists(execinfo backtrace "" COMPILER_RT_HAS_LIBEXECINFO)

trailofbits/polytracker polytracker/src/compiler-rt/cmake/config-ix.cmake :134 

check_library_exists(execinfo backtrace "" COMPILER_RT_HAS_LIBEXECINFO)

CTSRD-CHERI/cheribsd contrib/subrepo-cheri-compiler-rt/cmake/config-ix.cmake :171 

check_library_exists(execinfo backtrace "" COMPILER_RT_HAS_LIBEXECINFO)