An area for real crime related death videos that do not fit into other areas. Please note, the videos in this forum are gory, so be warned.
Celebrity Death Pictures & Famous Events - An area for all celebrity death photos and crime scene pictures from famous criminal investigations.
As far as I know, the compilation option for MSVC that tells the compiler to use special available instruction is /arch. On clang/linux, we can use -march=native to automatically detect the archite...
For -O0, whether -march=native or -march=-march=foo implies -mtune=foo unless you also specify a different -mtune. This is one reason why using -march is better than just enabling options like -mavx without doing anything about tuning. Caveat: -march=native on a CPU that GCC doesn't specifically recognize will still enable new instruction sets that GCC can detect, but will leave -mtune=generic. Use a new enough GCC that knows about ...
Instead of manually selecting the optimization flags I'm using -march=native, which in theory should add all optimization flags applicable to the hardware I'm compiling on.
unrecognized command-line option '-arch'; did you mean '-march='? Asked 4 years, 10 months ago Modified 1 year, 11 months ago Viewed 3k times
As I understand it, -march=native will detect the ISA and extensions to use from cpuid (which include model, family and stepping information). -march=xxx will use a baseline set of extensions and a baseline ISA. There are a lot of possible combinations of extensions, so only the most relevant were chosen (e.g. skylake-avx512 was added to reflect an important extension of some skylakes). -march ...