cmake HAVE_DLSYM_WITHOUT_DL examples

alibaba/AliSQL storage/tokudb/ft-index/cmake_modules/TokuFeatureDetection.cmake :78 

check_function_exists(dlsym HAVE_DLSYM_WITHOUT_DL)

percona/PerconaFT cmake_modules/TokuFeatureDetection.cmake :79 

check_function_exists(dlsym HAVE_DLSYM_WITHOUT_DL)

oscarlab/betrfs cmake_modules/TokuFeatureDetection.cmake :83 

check_function_exists(dlsym HAVE_DLSYM_WITHOUT_DL)