cmake HAVE_EXECINFO_WO_LINK examples

openclonk/openclonk CMakeLists.txt :250

check_cxx_symbol_exists(backtrace execinfo.h HAVE_EXECINFO_WO_LINK)

openclonk/openclonk CMakeLists.txt :251

mark_as_advanced(HAVE_EXECINFO_WO_LINK)