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HIP: Add CMAKE_HIP_HOST_COMPILER when compiler is NVCC

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Also add `HIPHOSTCXX` environment variable.
This commit is contained in:
Brad King
2023-09-25 16:00:22 -04:00
parent e43918b4ca
commit b3e92775ab
6 changed files with 41 additions and 8 deletions
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Help/variable/CMAKE_LANG_HOST_COMPILER.rst
+8 -5
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@@ -4,22 +4,25 @@ CMAKE_<LANG>_HOST_COMPILER
.. versionadded:: 3.10
``CMAKE_CUDA_HOST_COMPILER``
This variable is available when ``<LANG>`` is ``CUDA``.
.. versionadded:: 3.28
``CMAKE_HIP_HOST_COMPILER``
This variable is available when ``<LANG>`` is ``CUDA`` or ``HIP``.
When :variable:`CMAKE_<LANG>_COMPILER_ID` is
``NVIDIA``, ``CMAKE_<LANG>_HOST_COMPILER`` selects the compiler executable
to use when compiling host code for ``CUDA`` language files.
to use when compiling host code for ``CUDA`` or ``HIP`` language files.
This maps to the ``nvcc -ccbin`` option.
The ``CMAKE_<LANG>_HOST_COMPILER`` variable may be set explicitly before CUDA
is first enabled by a :command:`project` or :command:`enable_language`
or HIP is first enabled by a :command:`project` or :command:`enable_language`
command.
This can be done via ``-DCMAKE_<LANG>_HOST_COMPILER=...`` on the command line
or in a :ref:`toolchain file <Cross Compiling Toolchain>`. Or, one may set
the :envvar:`CUDAHOSTCXX` environment variable to
the :envvar:`CUDAHOSTCXX` or :envvar:`HIPHOSTCXX` environment variable to
provide a default value.
Once the CUDA language is enabled, the ``CMAKE_<LANG>_HOST_COMPILER``
Once the CUDA or HIP language is enabled, the ``CMAKE_<LANG>_HOST_COMPILER``
variable is read-only and changes to it are undefined behavior.
.. note::