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- Why is -march=native not enabled by default by compilers IDEs?
Why no march=native by default? As you have pointed out, besides producing binaries incompatibility with older CPUs, march=native isn't necessarily beneficial It improves performance in some cases such as numerical computing But it is not beneficial in many other cases, and is sometimes detrimental
- c++ - equivalent of -march=native for msvc - Stack Overflow
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
- gcc - How is -march different from -mtune? - Stack Overflow
-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
- c++ - What exactly does -march=native do? - Stack Overflow
Gentoo Wiki told me the following: Warning: GCC 4 2 and above support -march=native -march=native applies additional settings beyond -march, specific to your CPU Unless you have a specific reaso
- unrecognized command-line option -arch; did you mean -march=?
unrecognized command-line option '-arch'; did you mean '-march='? Asked 4 years, 4 months ago Modified 1 year, 6 months ago Viewed 3k times
- riscv cross compiler error: invalid -march= option: `rv64imafdc_zicsr
GNU assembler version 2 38 (x86_64-linux-gnu) using BFD version (GNU Binutils for Ubuntu) 2 38 Assembler messages: Fatal error: invalid -march= option: `rv64imafdc_zicsr' Thanks for any response and help! Best regards Troy
- -march=haswell vs -march=core-avx2 vs -mavx2 - Stack Overflow
What are the differences and tradeoffs between -march=haswell, -march=core-avx2, and -mavx2 for compiling avx2 intrinsics? I know that -mavx2 is a flag and -march=haswell core-avx2 are architectures which just translate to a bunch of flags So -mavx2 is a subset of the other two But beyond that, how do I choose the right one for my application?
- gcc: Differences between -march=native and -march= lt;specific arch gt;
In order to compare which flags various -march settings will enable, I am comparing the outputs of the following commands, as detailed in this SO answer: $ gcc -Q -march=native --help=targe
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