When you met the error below this while cmake the 'flann' library
CMake Error at src/cpp/CMakeLists.txt:33 (add_library):
No SOURCES given to target: flann_cpp
CMake Error at src/cpp/CMakeLists.txt:91 (add_library):
No SOURCES given to target: flann
In your flann master directory,
touch src/cpp/empty.cpp
and change the src/cpp/CMakeLists.txt
add_library(flann_cpp SHARED "") and add_library(flann SHARED "")
to
add_library(flann_cpp SHARED empty.cpp) and add_library(flann SHARED empty.cpp)
save and cmake in your master directory
