Repository files navigation

Qucs-S provides a fancy graphical user interface for a number of popular circuit simulationengines. Qucs-S contains instruments for schematic capture, visualization and provides differentspassive and active components including device library. The following simulation kernels are supported:

• Ngspice (recommended)
• Xyce
• SpiceOpus
• Qucsator (non-spice)

See thehttps://ra3xdh.github.io/ for more details. Qucs-S is basedon original Qucs code:https://github.com/Qucs/qucs

Qucs-S accepts donation using Boosty platform:https://boosty.to/qucs_s

Use CMake to build Qucs-S. Install all necessary dependencies: GCC, Qt, Flex, Bison and SPICE(optional). Installngspice that is not needed for build, but serves as the simulation kernel.

Qucs-S requires Qt6 libraries including QtCharts, CMake, flex, bison, gperf, and dos2unix as compile timedependencies. Install these packages using the package manager of your distribution before compiling Qucs-S.Ngspice is not required at compile time, but it is required as runtime dependency to run the simulation.

Here are some examples for the popular Linux distributions.

sudo apt-get install ngspice build-essential git cmake flex bison gperf dos2unixsudo apt-get install qt6-base-dev qt6-tools-dev qt6-tools-dev-tools libglx-dev linguist-qt6 sudo apt-get install qt6-l10n-tools libqt6svg6-dev libgl1-mesa-dev qt6-charts-dev libqt6opengl6-dev

sudo dnf install gcc-c++ cmake git flex bison gperf dos2unix ngspicesudo dnf install qt6-qtbase-devel cmake qt6-qtsvg-devel qt6-qttools-devel qt6-qtcharts-devel

After installing the dependecies, clone this git repository and execute in the top directory:

git submodule initgit submodule updatemkdir builddircd builddircmake ..  -DCMAKE_INSTALL_PREFIX=/your_install_prefix/makemake install

Since the v25.1.0 the Qucs-S will be configured with Qt6 by default. Substutute the/your_install_prefix/as desired installation directory. Substitute any desire path (for example$HOME/qucs-s) here.You may omit this option and installation steps. Default installation directory will be/usr/local ifCMAKE_INSTALL_PREFIX is not defined.

Qt5 support has been dropped since v25.1.0. Only Qt6 libraries are supported. Set theWITH_QT6=ONcmake flag if compiling the Qucs-S versions before v25.1.0

Then runqucs-s executable to launch the application:

cd /your_installation prefix/bin./qucs-s

Clangd looks forcompile_commands.json file in parent folders of the file it processes.compile_commands.json should be generated along with other build configuration fileswhen you runcmake as part of building routine:

mkdir builddircd builddircmake ..  -DCMAKE_INSTALL_PREFIX=/your_install_prefix/

Ifcompile_commands.json is already there, create a symbolic link to it from project root dir:

cd project_rootln -s ./builddir/compile_commands.json compile_commands.json

It may take some time to index files at first run. Clangd configuration is in.clangd file.