Building From Source

1. Building From Source#

Note

The build instructions here are for general users who just want to build OSC.

Because everyone’s C++ build environment is slightly different, there are no catch-all build instructions that will work for everyone. Instead, we recommend reading + running the automated build scripts (located at scripts/ in the source tree), or reading Setup Development Environment, which concretely covers tips-and-tricks for Visual Studio or QtCreator.

1.1. Building on Windows (10 or newer)#

1.1.1. Windows Environment Setup#

The OpenSim Creator build requires that the development environment has git, a C++-20 compiler, cmake, NSIS (if packaging an installer), and python (to run build_windows.py, build script bindings, and build this documentation). Here is a step-by-step guide for setting up a typical development environment:

  1. Get git:

    1. Download and install git from https://git-scm.com/downloads

    2. Make sure to add it to the PATH. Usually, the installer asks if you want this. If it doesn’t ask, then you may need to add it manually (google: “Modify windows PATH”, add your git install, which defaults to C:\Program Files\Git\bin).

    3. Verify it’s installed by opening a terminal (Shift+Right-Click -> Open Powershell window here) and run git

  2. Get a C++20-compatible compiler (Visual Studio 17 2022):

    1. Download and install it from https://visualstudio.microsoft.com/downloads/

    2. Make sure to select C/C++ development in the installer wizard when it asks you which parts you would like to install

  3. Get cmake:

    1. Download and install it from https://cmake.org/download/

    2. Make sure to add it to the PATH. Usually, the installer asks if you want this. If it doesn’t ask, then you may need to add it manually (google: “Modify windows PATH”, add your cmake install: C:\Program Files\CMake\bin).

    3. Verify it’s installed by opening a terminal (Shift+Right-Click -> Open Powershell window here) and run cmake.

  4. Get NSIS (if packaging an installer):

    1. Download and install it from https://nsis.sourceforge.io/Download

  5. Get python and pip:

    1. Download from https://www.python.org/downloads/

    2. Make sure python and pip are added to the PATH (the installer usually prompts this)

    3. Verify they are installed by opening a terminal (Shift+Right-Click -> Open Powershell window here) and run python --help and pip --help

  6. Clone the opensim-creator source code repository:

    1. Open a terminal, cd to your workspace directory (e.g. Desktop), and run git clone https://github.com/ComputationalBiomechanicsLab/opensim-creator

    2. The resulting opensim-creator directory should contain all necessary source code to build the project (incl. third_party code etc.)

  1. Install pip package dependencies (if building these documentation pages):

    1. Using either a virtual environment (google it), or your base python installation, cd into the opensim-creator directory in a terminal and install the documentation package dependencies with:

pip install -r docs/requirements.txt
pip install -r docs/requirements-dev.txt

1.1.2. Windows Build#

Assuming your environment has been set up correctly (explained above), the easiest way to build OpenSim Creator is with the python script located at scripts/build_windows.py in the source code repository. The steps are:

  1. Open a PowerShell terminal (Shift+Right-Click -> Open Powershell window here)

  2. Either cd into the opensim-creator directory (if cloned when you setup the environment, above), or clone it with git clone https://github.com/ComputationalBiomechanicsLab/opensim-creator.

  3. Run the build script: python scripts/build_windows.py. Note: this can take a long time, grab a coffee ☕

  4. The osc-build directory should contain the built installer

1.2. Building on MacOS (Sonoma or newer)#

  1. Get brew:

    1. Go to https://brew.sh/ and follow installation instructions

  2. Get git:

    1. Can be installed via brew: brew install git

  3. Get C++20-compatible compiler (e.g. clang via brew, or newer XCodes):

    1. OpenSim Creator is a C++20 project, so you’ll have to use a more recent XCode (>14), or install a newer clang from brew (e.g. brew install clang)

  4. Get cmake:

    1. Can be installed via brew: brew install cmake

  5. Get python and pip (optional: you only need this if you want to build documentation):

    1. Can be installed via brew: brew install python

  6. Build OpenSim Creator in a terminal:

    1. Clone opensim-creator: git clone https://github.com/ComputationalBiomechanicsLab/opensim-creator

    2. cd into the source dir: cd opensim-creator

    3. If you have multiple C++ compilers, make sure that the CC and CXX environment variables point to compilers that are compatible with C++20. E.g. export CXX=$(brew --prefix llvm@15)/bin/clang++

    4. Run the build script: scripts/build_mac.sh (warning: can take a long time)

  7. Done:

    1. The osc-build directory should contain the built installer

1.3. Building on Ubuntu (20.04 or newer)#

  1. Get git:

    1. Install git via your package manager (e.g. apt-get install git)

  2. Get a C++20-compatible compiler:

    1. Install g++ / clang++` via your package manager (e.g. apt-get install g++)

    2. They must be new enough to compile C++20 (e.g. clang >= clang-11)

    3. If they aren’t new enough, most OSes provide a way to install a newer compiler toolchain (e.g. apt-get install clang-11). You can configure which compiler is used to build OpenSim Creator by setting the CC and CXX environment variables. E.g. CC=clang-11 CXX=clang++-11 ./scripts/build_ubuntu-20.04.sh

  3. Get C++20-compatible standard library headers (usually required on Ubuntu 20):

    1. sudo apt-get install libstdc++-10-dev

  4. Get cmake:

    1. Install cmake via your package manager (e.g. apt-get install cmake)

    2. If your cmake is too old, build one from source, see: https://askubuntu.com/a/865294

  5. Get python and pip (optional: you only need this if you want to build documentation):

    1. Install python3 and pip3 via your package manager (e.g. apt-get install python3 pip3)

  6. Use git to get OpenSim Creator’s (+ dependencies’) source code:

    1. Clone opensim-creator: git clone https://github.com/ComputationalBiomechanicsLab/opensim-creator

    2. cd into the source dir: cd opensim-creator

    3. The remaining build steps are performed in the source directory

  7. Get python libraries (optional: you only need this if you want to build documentation):

    1. cd into the opensim-creator source directory (if you haven’t already)

    2. Install all necessary python libraries into your current python environment with pip install -r docs/requirements.txt && pip install -r docs/requirements-dev.txt`

  8. Build OpenSim Creator from source:

    1. cd into the opensim-creator source directory (if you haven’t already) 1. If you have multiple C++ compilers, make sure that the CC and CXX environment variables point to compilers that are compatible with C++20. E.g. export CC=clang-12, export CXX=clang++-12 3. Run the build script: scripts/build_ubuntu-20.04.sh 4. You can also accelerate it by setting the number of threads: OSC_BUILD_CONCURRENCY=20 ./scripts/build_ubuntu-20.04.sh

  9. Done:

    1. After the build is complete, the osc-build directory should contain the built installer