5a6379f1fd
On Windows the value may not match the compiler's target architecture. Update the documentation to state this explicitly. Issue: #15170
14 lines
627 B
ReStructuredText
14 lines
627 B
ReStructuredText
CMAKE_SYSTEM_PROCESSOR
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----------------------
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When not cross-compiling, this variable has the same value as the
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:variable:`CMAKE_HOST_SYSTEM_PROCESSOR` variable. In many cases,
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this will correspond to the target architecture for the build, but
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this is not guaranteed. (E.g. on Windows, the host may be ``AMD64``
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even when using a MSVC ``cl`` compiler with a 32-bit target.)
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When cross-compiling, a :variable:`CMAKE_TOOLCHAIN_FILE` should set
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the ``CMAKE_SYSTEM_PROCESSOR`` variable to match target architecture
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that it specifies (via :variable:`CMAKE_<LANG>_COMPILER` and perhaps
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:variable:`CMAKE_<LANG>_COMPILER_TARGET`).
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