Linux下Flann库编译

在编译Flann是显示以下错误

CMake Eroor at src/cpp/CMakeLists.txt:86 (add_library):
No SOURCES given to target: flann

CMake Eroor at src/cpp/CMakeLists.txt:32 (add_library):
No SOURCES given to target: flann_cpp

解决办法：

touch src/cpp/empty.cpp

即新建一个empty.cpp文件

然后修改src/cpp/CMakeList.txt文件

第32行：将add_library(flann_cpp SHARED "") 修改为add_library(flann_cpp SHARED empty.cpp)

第86行：将add_library(flann SHARED "") 修改为 add_library(flann SHARED empty.cpp)