Build error

[Barmarel]

I downloaded the application archive, version 0.9.7 from GitHub, extracted the contents to my home directory, read the instructions, went to the unpacked directory, opened a terminal, entered the command specified in the instructions: cmake [-DCMAKE_INSTALL_PREFIX=/usr/local] -B build

I got this error:

$ cmake [-DCMAKE_INSTALL_PREFIX=/usr/local] -B build
CMake Error: The source directory "/home/user/qjackctl-qjackctl_0_9_7/[-DCMAKE_INSTALL_PREFIX=/usr/local]" does not exist.
Specify --help for usage, or press the help button on the CMake GUI.

My system: KDE Neon: 5.24 KDE Plasma: 5.24.4 KDE Frameworks: 5.93.0 Qt Version: 5.15.3 Linux Kernel Version: 5.13.0-40-generic (64-bit) Graphics Platform: X11

Why does this error occur? How can I fix it?

[rncbc]

the stuff between brackets "["..."]" is just a way to say optional and (the brackets) should not go in the literal command line

please retry with just: cmake -B build

[Barmarel]

Now I get another error:

~/qjackctl-qjackctl_0_9_7$ cmake -B build
-- The C compiler identification is GNU 9.4.0
-- The CXX compiler identification is GNU 9.4.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
fatal: not a git repository (or any parent up to mount point /)
Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).
CMake Error at CMakeLists.txt:140 (find_package):
  By not providing "FindQt.cmake" in CMAKE_MODULE_PATH this project has asked
  CMake to find a package configuration file provided by "Qt", but CMake did
  not find one.

  Could not find a package configuration file provided by "Qt" with any of
  the following names:

    QtConfig.cmake
    qt-config.cmake

  Add the installation prefix of "Qt" to CMAKE_PREFIX_PATH or set "Qt_DIR" to
  a directory containing one of the above files.  If "Qt" provides a separate
  development package or SDK, be sure it has been installed.

-- Configuring incomplete, errors occurred!
See also "/home/user/qjackctl-qjackctl_0_9_7/build/CMakeFiles/CMakeOutput.log".

[rncbc]

you need to install the needed development packages for build as pre-requirements

these are often suffixed -dev on deb(ian) or -devel on rpm based systems; package names vary (a lot) but for instance, if you're on a deb/apt base systems, this will do:

sudo apt-get install qtbase5-dev qtbase5-dev-tools qttools5-dev qttools5-dev-tools qtwayland5-dev libqt5svg5-dev
sudo apt-get install libasound2-dev libjack-dev

hth.

[Barmarel]

Cool, now it's working. 😀 Only with this warning:

CMake Warning at CMakeLists.txt:258 (message):
  *** PORTAUDIO library not found.

Thank you very much for your help. 🙂