I've got a question whose answer I expected to find on one of these pages, but no joy: https://fedoraproject.org/wiki/Architectures https://fedoraproject.org/wiki/Architectures/x86 https://fedoraproject.org/wiki/Architectures/x86-64 I'm packaging a library that does some heavy mathematical computations. The build system tries to cleverly determine whether an Intel CPU with vector instructions is being used. Until I can convince upstream to do this at runtime, I'll need to build the package (a library) for the lowest common denominator. The package checks for MMX, SSE, SSE2, SSE3, and SSSE3. For i686, can I assume MMX? SSE? I believe I can also build an SSE2 version of the library and drop it into /usr/lib/sse2. How about for x86_64? Can I assume SSE2 is available? (I thought I could, but I see that /usr/lib64/sse2 exists on my machine, so now I'm uncertain.) I don't see a /usr/lib64/sse3 or /usr/lib64/ssse3, so I just have to forget those, right? If there is a wiki page that answers these questions, I'd appreciate a pointer. If not, perhaps someone with edit privileges could add the answer to one of the pages listed above. Thanks, -- Jerry James http://www.jamezone.org/ -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel