76 lines
2.1 KiB
ReStructuredText
76 lines
2.1 KiB
ReStructuredText
.. include:: /substitutions.rst
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.. _compiling:
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=========
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Compiling
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=========
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Now that we've installed Apache NuttX prerequisites and downloaded the source code,
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we are ready to compile the source code into an executable binary file that can
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be run on the embedded board.
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Initialize Configuration
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========================
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The first step is to initialize NuttX configuration for a given board, based from
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a pre-existing configuration. To list all supported configurations you can do:
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.. code-block:: console
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$ cd nuttx
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$ ./tools/configure.sh -L | less
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The output is in the format ``<board name>:<board configuration>``. You will see that
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generally all boards support the ``nsh`` configuration which is a good starting point
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since it enables booting into the interactive command line
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:doc:`/applications/nsh/index`.
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To choose a configuration you pass the ``<board name>:<board configuration>`` option
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to ``configure.sh`` and indicate your host platform, such as:
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.. code-block:: console
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$ cd nuttx
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$ ./tools/configure.sh -l stm32f4discovery:nsh
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The ``-l`` tells use that we're on Linux (macOS and Windows builds are
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possible). Use the ``-h`` argument to see all available options.
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You can then customize this configuration by using the menu based
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configuration system with:
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.. code-block:: console
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$ cd nuttx/
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$ make menuconfig
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Modifying the configuration is covered in :doc:`configuring`.
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Build NuttX
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===========
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We can now build NuttX. To do so, you can simply run:
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.. code-block:: console
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$ cd nuttx/
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$ make
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The build will complete by generating the binary outputs
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inside ``nuttx`` directory. Typically this includes the ``nuttx``
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ELF file (suitable for debugging using ``gdb``) and a ``nuttx.bin``
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file that can be flashed to the board.
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To clean the build, you can do:
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.. code-block:: console
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$ make clean
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.. tip::
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To increase build speed (or of any other target such as ``clean``), you can
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pass the ``-jN`` flag to ``make``, where ``N`` is the number of parallel jobs
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to start (usually, the number of processors on your machine).
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