205 lines
5.7 KiB
ReStructuredText
205 lines
5.7 KiB
ReStructuredText
.. _installing_zephyr_mac:
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Development Environment Setup on Mac OS
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#######################################
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This section describes how to set up a Mac OS development system.
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After completing these steps, you will be able to compile and run your Zephyr
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applications on the following Mac OS version:
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* Mac OS X 10.11 (El Capitan)
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Developing for Zephyr on OS X generally requires you to build the
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toolchain yourself. However, if there is already an OS X toolchain for your
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target architecture you can use it directly.
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Using a 3rd Party toolchain
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***************************
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If a toolchain is available for the architecture you plan to build for, then
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you can use it as explained in:
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:ref:`third_party_x_compilers`.
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An example of an available 3rd party toolchain is GCC ARM Embedded for the
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Cortex-M family of cores.
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.. _mac_requirements:
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Installing Requirements and Dependencies
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****************************************
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To install the software components required to build the Zephyr kernel on a
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Mac, you will need to build a cross compiler for the target devices you wish to
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build for and install tools that the build system requires.
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.. note::
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Minor version updates of the listed required packages might also
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work.
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Before proceeding with the build, ensure your OS is up to date.
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First, install the :program:`Homebrew` (The missing package manager for
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OS X). Homebrew is a free and open-source software package management system
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that simplifies the installation of software on Apple's OS X operating
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system.
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To install :program:`Homebrew`, visit the `Homebrew site`_ and follow the
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installation instructions on the site.
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To complete the Homebrew installation, you might be prompted to install some
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missing dependency. If so, follow please follow the instructions provided.
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After Homebrew was successfully installed, install the following tools using
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the brew command line.
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.. code-block:: console
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$ brew install gettext qemu help2man mpfr gmp coreutils wget python3
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$ brew tap homebrew/dupes
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$ brew install grep --with-default-names
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$ pip3 install ply
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.. code-block:: console
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$ brew install crosstool-ng
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Alternatively you can install the latest version of :program:`crosstool-ng`
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from source. Download the latest version from the `crosstool-ng site`_. The
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latest version usually supports the latest released compilers.
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.. code-block:: console
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$ wget
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http://crosstool-ng.org/download/crosstool-ng/crosstool-ng-1.22.0.tar.bz2
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$ tar xvf crosstool-ng-1.22.0.tar.bz2
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$ cd crosstool-ng/
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$ ./configure
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$ make
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$ make install
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.. _setting_up_mac_toolchain:
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Setting Up the Toolchain
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************************
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Creating a Case-sensitive File System
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=====================================
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Building the compiler requires a case-senstive file system. Therefore, use
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:program:`diskutil` to create an 8 GB blank sparse image making sure you select
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case-sensitive file system (OS X Extended (Case-sensitive, Journaled) and
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mount it.
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Alternatively you can use the script below to create the image:
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.. code-block:: bash
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#!/bin/bash
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ImageName=CrossToolNG ImageNameExt=${ImageName}.sparseimage
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diskutil umount force /Volumes/${ImageName} && true
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rm -f ${ImageNameExt} && true
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hdiutil create ${ImageName} -volname ${ImageName} -type SPARSE -size 8g -fs HFSX
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hdiutil mount ${ImageNameExt}
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cd /Volumes/$ImageName
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When mounted, the file system of the image will be available under
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:file:`/Volumes`. Change to the mounted directory:
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.. code-block:: console
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$ cd /Volumes/CrossToolNG
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$ mkdir build
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$ cd build
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Setting the Toolchain Options
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=============================
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In the Zephyr kernel source tree we provide two configurations for
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both ARM and X86 that can be used to pre-select the options needed
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for building the toolchain.
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The configuration files can be found in :file:`${ZEPHYR_BASE}/scripts/cross_compiler/`.
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.. code-block:: console
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$ cp ${ZEPHYR_BASE}/scripts/cross_compiler/x86.config .config
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You can create a toolchain configuration or customize an existing configuration
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yourself using the configuration menus:
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.. code-block:: console
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$ ct-ng menuconfig
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Verifying the Configuration of the Toolchain
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============================================
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Before building the toolchain it is advisable to perform a quick verification
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of the configuration set for the toolchain.
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1. Open the generated :file:`.config` file.
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2. Verify the following lines are present, assuming the sparse image was
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mounted under :file:`/Volumes/CrossToolNG`:
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.. code-block:: bash
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...
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CT_LOCAL_TARBALLS_DIR="/Volumes/CrossToolNG/src"
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# CT_SAVE_TARBALLS is not set
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CT_WORK_DIR="${CT_TOP_DIR}/.build"
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CT_PREFIX_DIR="/Volumes/CrossToolNG/x-tools/${CT_TARGET}"
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CT_INSTALL_DIR="${CT_PREFIX_DIR}"
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# Following options prevent link errors
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CT_WANTS_STATIC_LINK=n
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CT_CC_STATIC_LIBSTDCXX=n
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...
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Building the Toolchain
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======================
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To build the toolchain, enter:
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.. code-block:: console
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$ ct-ng build
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The above process takes a while. When finished, the toolchain will be available
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under :file:`/Volumes/CrossToolNG/x-tools`.
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Repeat the step for all architectures you want to support in your environment.
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To use the toolchain with Zephyr, export the following environment variables
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and use the target location where the toolchain was installed, type:
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.. code-block:: console
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$ export ZEPHYR_GCC_VARIANT=xtools
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$ export XTOOLS_TOOLCHAIN_PATH=/Volumes/CrossToolNG/x-tools
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To use the same toolchain in new sessions in the future you can set the
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variables in the file :file:`${HOME}/.zephyrrc`, for example:
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.. code-block:: console
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$ cat <<EOF > ~/.zephyrrc
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export XTOOLS_TOOLCHAIN_PATH=/Volumes/CrossToolNG/x-tools
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export ZEPHYR_GCC_VARIANT=xtools
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EOF
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.. _Homebrew site: http://brew.sh/
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.. _crosstool-ng site: http://crosstool-ng.org
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