The core software is built with CMake. It is recommended to build out of tree like illustrated below.
$ mkdir build $ cd build $ cmake .. -DCMAKE_TOOLCHAIN_FILE=<toolchain> -DCMAKE_SYSTEM_PROCESSOR=cortex-m<nr><features> $ make
Available build options can be listed with cmake -LH ..
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Supported CPU targets are any of the Cortex-M processors with any of the supported features, for example cortex-m33+nodsp+nofp. A toolchain file is required to cross compile the software.