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- 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
- 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
- -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?
- What are my available march mtune options? - Stack Overflow
Is there a way to get gcc to output the available -march=arch options? I'm getting build errors (tried -march=x86_64) and I don't know what my options are The compiler I'm using is a proprietary
- How do I format a date in JavaScript? - Stack Overflow
You can also pull out the parts of a DateTimeFormat one-by-one using DateTimeFormat#format, but note that when using this method, as of March 2020, there is a bug in the ECMAScript implementation when it comes to leading zeros on minutes and seconds (this bug is circumvented by the approach above)
- 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
- gcc: Differences between -march=native and -march= lt;specific arch gt;
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
- How to see which flags -march=native will activate?
I'm compiling my C++ app using GCC 4 3 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
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