cmake nanoflann examples

alicevision/AliceVision src/CMakeLists.txt :330 

find_package(nanoflann REQUIRED)

openturns/openturns CMakeLists.txt :389 

find_package (nanoflann CONFIG)

StephLin/KCP CMakeLists.txt :27 

find_package(nanoflann REQUIRED QUIET)

MRPT/mrpt cmakemodules/script_nanoflann.cmake :9 

find_package(nanoflann CONFIG QUIET)