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43 lines
1.2 KiB
43 lines
1.2 KiB
CMAKE_HOST_SYSTEM_PROCESSOR
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---------------------------
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The name of the CPU CMake is running on.
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Windows Platforms
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^^^^^^^^^^^^^^^^^
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On Windows, this variable is set to the value of the environment variable
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``PROCESSOR_ARCHITECTURE``.
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Unix Platforms
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^^^^^^^^^^^^^^
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On systems that support ``uname``, this variable is set to the output of:
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- ``uname -m`` on GNU, Linux, Cygwin, Android, or
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- ``arch`` on OpenBSD, or
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- on other systems,
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* ``uname -p`` if its exit code is nonzero, or
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* ``uname -m`` otherwise.
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macOS Platforms
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^^^^^^^^^^^^^^^
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The value of ``uname -m`` is used by default.
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On Apple Silicon hosts, the architecture printed by ``uname -m`` may vary
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based on CMake's own architecture and that of the invoking process tree.
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.. versionadded:: 3.19.2
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On Apple Silicon hosts:
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* The :variable:`CMAKE_APPLE_SILICON_PROCESSOR` variable or
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the :envvar:`CMAKE_APPLE_SILICON_PROCESSOR` environment variable
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may be set to specify the host architecture explicitly.
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* If :variable:`CMAKE_OSX_ARCHITECTURES` is not set, CMake adds explicit
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flags to tell the compiler to build for the host architecture so the
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toolchain does not have to guess based on the process tree's architecture.
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