FAQ: how do I configure a pip source build?

CasADi >=3.6.0 offers pip source pacakages. pip install --verbose casadi will provide more insight.

Use FAQ: what cmake build options/build flags should I use? to collect a list of build options, e.g. -DWITH_IPOPT=ON and -DWITH_BUILD_IPOPT=ON.

Be sure to meet source build dependencies.

Remove the previous pip build with pip uninstall casadi.

Up to CasADi 3.6.2:

Run pip install --verbose casadi again in a context with CASADI_SETUP_CMAKE_ARGS defined as a newline-separated list of build options. e.g. in Linux/Mac:

export CASADI_SETUP_CMAKE_ARGS="-DWITH_BUILD_IPOPT=ON\n-DWITH_IPOPT=ON\n-DWITH_BUILD_REQUIRED=ON"
pip install --verbose casadi

From CasADi 3.6.3 onwards:

Run pip install --verbose casadi again in a context with CASADI_SETUP_CMAKE_ARGS defined as a semicolon-separated list of build options. e.g. in Linux/Mac:

export CASADI_SETUP_CMAKE_ARGS="-DWITH_BUILD_IPOPT=ON;-DWITH_IPOPT=ON;-DWITH_BUILD_REQUIRED=ON"
pip install --verbose casadi