I can not append sources but compiled it by revisement of CMakeLists.txt. --- $ tree . . ├── CMakeLists.txt ├── build └── src ├── CMakeLists.txt ├── main.c └── main.h 2 directories, 4 files --- $ cd build $ cmake .. -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- ========== Configuring Audacity_001 ========== -- ========== Configuring /home/nakagawa/src/20201024/src ========== -- ========== Configuring /home/nakagawa/src/20201024 ========== CMake Error at src/CMakeLists.txt:9 (add_executable): add_executable called with incorrect number of arguments CMake Error at src/CMakeLists.txt:16 (source_organization): Unknown CMake command "source_organization". -- Configuring incomplete, errors occurred! See also "/home/nakagawa/src/20201024/build/CMakeFiles/CMakeOutput.log". --- #cmake_minimum_required( VERSION 3.6.1 ) cmake_minimum_required( VERSION 2.8.12.2 ) project( Audacity_001 ) set( topdir "${CMAK...