CMAKE_OSX_ARCHITECTURES

From Get docs
Cmake/docs/3.21/envvar/cmake osx architectures


CMAKE_OSX_ARCHITECTURES

This is a CMake Environment Variable. Its initial value is taken from the calling process environment.

Target specific architectures for macOS.

The CMAKE_OSX_ARCHITECTURES environment variable sets the default value for the CMAKE_OSX_ARCHITECTURES variable. See OSX_ARCHITECTURES for more information.

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https://cmake.org/cmake/help/v3.21/envvar/CMAKE_OSX_ARCHITECTURES.html