Determine if RetroArch is 32 or 64 Bit

I’m working on integrating RetroArch with my HTPC front end. One of the things I’d like to be able to do if download the needed core if it does not exist. However, if I download the 32 bit core for a 64 bit RA install, it won’t work. Is there an obvious way to tell if the RetroArch version installed is the 32 bit or 64 bit version. I didn’t see anything that jumped out to me with a fresh install. Any help would be appreciated.

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If you type: retroarch.exe --help into a command prompt, it will say at the top which compiler was used to build it and what its bitness is.

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Perfect. Thank you.