Hello, I want to build Arrow C++ from source. I follow the steps according to the instructions in: https://github.com/apache/arrow/tree/master/cpp
But I was stuck for a few hours after entering the commands *make unittest* as follows: ===================================================== $make unittest -j4 [ 4%] Built target flatbuffers_ep [ 10%] Built target lz4_ep [ 12%] Built target snappy_ep [ 16%] Built target rapidjson_ep [ 20%] Built target zlib_ep [ 20%] Performing download step (download, verify and extract) for 'brotli_ep' [ 27%] Built target zstd_ep [ 29%] Built target googletest_ep [ 35%] Built target metadata_fbs [ 35%] Built target gflags_ep ====================================================== My environment is Linux with gcc 4.8.5 and cmake 3.12.0. I guess it keeps downloading for 'brotli_ep'? Any suggestion would be helpful. Thanks. Best regards, Wenjian
