nanoflann-knn/build/nanoflann.pc

prefix=/usr/local
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
includedir=${prefix}/include

Name: The ANN nanoflann library
Description: nanoflann - A C++11 header-only library for kd-trees
URL: https://github.com/jlblancoc/nanoflann
Requires: 
Version: 1.5.5
Libs:
Libs.private:
Cflags: -I${includedir}