Step1: cmake3

 (20200912: Empty cmake3)
tree .
.
└── build

1 directory, 0 files

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cmake3 ..
CMake Error: The source directory "/home/nakagawa/src" does not appear to contain CMakeLists.txt.
Specify --help for usage, or press the help button on the CMake GUI.

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 (20200913: only main code and cmake3)
 

.
├── CMakeLists.txt
├── build
├── directory.txt
└── main.c

1 directory, 3 files


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$ cmake3 ..
-- The C compiler identification is GNU 4.4.7
-- The CXX compiler identification is GNU 4.4.7
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Configuring done
-- Generating done
-- Build files have been written to: /home/nakagawa/src/build

(20200916 cmake3 )
$ cmake3 .. --build
CMake Error: The source directory "---account---/src/build/--build" does not exist.
Specify --help for usage, or press the help button on the CMake GUI.

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$ tree
.
├── CMakeLists.txt
├── build
│   ├── CMakeCache.txt
│   ├── CMakeFiles
│   │   ├── 3.6.1
│   │   │   ├── CMakeCCompiler.cmake
│   │   │   ├── CMakeCXXCompiler.cmake
│   │   │   ├── CMakeDetermineCompilerABI_C.bin
│   │   │   ├── CMakeDetermineCompilerABI_CXX.bin
│   │   │   ├── CMakeSystem.cmake
│   │   │   ├── CompilerIdC
│   │   │   │   ├── CMakeCCompilerId.c
│   │   │   │   └── a.out
│   │   │   └── CompilerIdCXX
│   │   │       ├── CMakeCXXCompilerId.cpp
│   │   │       └── a.out
│   │   ├── CMakeDirectoryInformation.cmake
│   │   ├── CMakeOutput.log
│   │   ├── CMakeTmp
│   │   ├── Makefile.cmake
│   │   ├── Makefile2
│   │   ├── TargetDirectories.txt
│   │   ├── cmake.check_cache
│   │   ├── feature_tests.bin
│   │   ├── feature_tests.c
│   │   ├── feature_tests.cxx
│   │   └── progress.marks
│   ├── Makefile
│   └── cmake_install.cmake
├── directory.txt
└── main.c

6 directories, 25 files

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