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Merge topic 'doc-system-processor'

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5a6379f1fd Help: Clarify meaning of CMAKE_SYSTEM_PROCESSOR

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !5744
This commit is contained in:
Brad King
2021-01-27 14:03:27 +00:00
committed by Kitware Robot
parent 7ab6d1e831 5a6379f1fd
commit 977811a8ff
1 changed files with 9 additions and 4 deletions
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13
Help/variable/CMAKE_SYSTEM_PROCESSOR.rst
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CMAKE_SYSTEM_PROCESSOR
----------------------
The name of the CPU CMake is building for.
When not cross-compiling, this variable has the same value as the
:variable:`CMAKE_HOST_SYSTEM_PROCESSOR` variable. In many cases,
this will correspond to the target architecture for the build, but
this is not guaranteed. (E.g. on Windows, the host may be ``AMD64``
even when using a MSVC ``cl`` compiler with a 32-bit target.)
This variable is the same as :variable:`CMAKE_HOST_SYSTEM_PROCESSOR` if
you build for the host system instead of the target system when
cross compiling.
When cross-compiling, a :variable:`CMAKE_TOOLCHAIN_FILE` should set
the ``CMAKE_SYSTEM_PROCESSOR`` variable to match target architecture
that it specifies (via :variable:`CMAKE_<LANG>_COMPILER` and perhaps
:variable:`CMAKE_<LANG>_COMPILER_TARGET`).