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