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-rw-r--r--Help/variable/CMAKE_HOST_SYSTEM_VERSION.rst7
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diff --git a/Help/variable/CMAKE_HOST_SYSTEM_VERSION.rst b/Help/variable/CMAKE_HOST_SYSTEM_VERSION.rst
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CMAKE_HOST_SYSTEM_VERSION
-------------------------
-OS version CMake is running on.
+The OS version CMake is running on.
-The same as CMAKE_SYSTEM_VERSION but for the host system instead of
-the target system when cross compiling.
+A numeric version string for the system. On systems that support
+uname, this variable is set to the output of uname -r. On other
+systems this is set to major-minor version numbers.