75 lines
2.4 KiB
ReStructuredText
75 lines
2.4 KiB
ReStructuredText
.. _toolchain_cadence_xcc:
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Cadence Tensilica Xtensa C/C++ Compiler (XCC)
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#############################################
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#. Obtain Tensilica Software Development Toolkit targeting the specific SoC
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on hand. This usually contains two parts:
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* The Xtensa Xplorer which contains the necessary executables and
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libraries.
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* A SoC-specific add-on to be installed on top of Xtensa Xplorer.
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* This add-on allows the compiler to generate code for the SoC on hand.
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#. Install Xtensa Xplorer and then the SoC add-on.
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* Follow the instruction from Cadence on how to install the SDK.
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* Depending on the SDK, there are two set of compilers:
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* GCC-based compiler: ``xt-xcc`` and its friends.
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* Clang-based compiler: ``xt-clang`` and its friends.
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#. Make sure you have obtained a license to use the SDK, or has access to
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a remote licensing server.
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#. :ref:`Set these environment variables <env_vars>`:
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* Set :envvar:`ZEPHYR_TOOLCHAIN_VARIANT` to ``xcc`` or ``xcc-clang``.
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* Set :envvar:`XTENSA_TOOLCHAIN_PATH` to the toolchain installation
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directory.
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* Set :envvar:`XTENSA_CORE` to the SoC ID where application is being
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targeting.
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* Set :envvar:`TOOLCHAIN_VER` to the Xtensa SDK version.
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#. For example, assuming the SDK is installed in ``/opt/xtensa``, and
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using the SDK for application development on ``intel_adsp_cavs15``,
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setup the environment using:
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.. code-block:: console
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# Linux
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export ZEPHYR_TOOLCHAIN_VARIANT=xcc
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export XTENSA_TOOLCHAIN_PATH=/opt/xtensa/XtDevTools/install/tools/
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export XTENSA_CORE=X6H3SUE_RI_2018_0
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export TOOLCHAIN_VER=RI-2018.0-linux
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#. To use Clang-based compiler:
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* Set :envvar:`ZEPHYR_TOOLCHAIN_VARIANT` to ``xcc-clang``.
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* Note that the Clang-based compiler may contain an old LLVM bug which
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results in the following error:
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.. code-block:: console
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/tmp/file.s: Assembler messages:
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/tmp/file.s:20: Error: file number 1 already allocated
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clang-3.9: error: Xtensa-as command failed with exit code 1
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If this happens, set :envvar:`XCC_NO_G_FLAG` to ``1``.
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* For example:
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.. code-block:: console
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# Linux
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export XCC_NO_G_FLAG=1
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* Also note that setting :envvar:`XCC_USE_CLANG` to ``1`` and
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:envvar:`ZEPHYR_TOOLCHAIN_VARIANT` to ``xcc`` is deprecated.
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Set :envvar:`ZEPHYR_TOOLCHAIN_VARIANT` to ``xcc-clang`` instead.
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