cmake HAVE_QSORT_R examples

LiangliangNan/MVStudio 3rd_party/nlopt/CMakeLists.txt :121 

check_function_exists (qsort_r HAVE_QSORT_R)

stevengj/nlopt CMakeLists.txt :98 

check_function_exists (qsort_r HAVE_QSORT_R)