Ray Molenkamp
0326b29899
This adds an sse42 cpu check on startup for both linux and windows, mac has been excluded, since there are no intel based macs that do not support SSE42. The way this works is, we count on the OS to initialize the shared libraries in the order they are linked (which currently holds true) before calling the initialization code in the main executable. This allows us to check the CPU before running any of the code in the main executable that might not be supported by the current isa. Changing those build flags is for a future PR, but for now and for future reference: blender_cpu_check must be build without optimized CPU flags so it'll be able to run on older CPUs. some code has been duplicated from blenlib, there's really no way around that since we cannot link blenlib as it may be build with optimized cpu flags. Windows currently gives a popup to inform the user, while linux reports to the console, there may be better ways to communicate with linux users with perhaps some generic GUI popup, but I'm unaware of these and will leave this for the linux platform maintainer to polish. Part of #116592 Pull Request: https://projects.blender.org/blender/blender/pulls/118054
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