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- CMAKE_SYSTEM_NAME
- -----------------
- The name of the operating system for which CMake is to build.
- See the :variable:`CMAKE_SYSTEM_VERSION` variable for the OS version.
- Note that ``CMAKE_SYSTEM_NAME`` is not set to anything by default when running
- in script mode, since it's not building anything.
- System Name for Host Builds
- ^^^^^^^^^^^^^^^^^^^^^^^^^^^
- ``CMAKE_SYSTEM_NAME`` is by default set to the same value as the
- :variable:`CMAKE_HOST_SYSTEM_NAME` variable so that the build
- targets the host system.
- System Name for Cross Compiling
- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
- ``CMAKE_SYSTEM_NAME`` may be set explicitly when first configuring a new build
- tree in order to enable :ref:`cross compiling <Cross Compiling Toolchain>`.
- In this case the :variable:`CMAKE_SYSTEM_VERSION` variable must also be
- set explicitly.
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