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symbol lookup error: xxx.so: undefined symbol: xxx

//生成.so文件 add_library(${PROJECT_NAME} src/filter_utils.cpp ) //指定路径 set(PATH /home/lst/Desktop/) set_target_properties(${PROJECT_NAME} PROPERTIES LIBRARY_OUTPUT_DIRECTORY ${PATH}) ${PROJECT_SOURCE_DIR} // "/home/lst/Desktop/workspace/temp_ground/src/.

CMake Error at /usr/local/lib/cmake/Ceres/CeresConfig.cmake:91 (message): Failed to find Ceres - Found Eigen dependency, but the version of Eigen found (3.3.4) does not exactly match the version of Eigen Ceres was compiled with (3.2.92). This can ca

问题描述： /usr/include/lz4.h:196:57: error: conflicting declaration ‘typedef struct LZ4_stream_t LZ4_stream_t’ typedef struct { long long table[LZ4_STREAMSIZE_U64]; } LZ4_stream_t; /usr/include/lz4.h:249:72: error: conflicting declaration ‘typedef struct LZ.