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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 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
- Why is -march=native not enabled by default by compilers IDEs?
For -O0, whether -march=native or -march=<generic> is the default still specifies the same family, so both are perfectly compatibly with -O0; and whenever another optimization level is specified, -march=native is beneficial to performance So, for me, the fact that -O0 is the default doesn't matter for -march 's default
- 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
- 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
- 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)
- 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
- Specify `--march` in a Spring Boot Native Build - Stack Overflow
-march: generate instructions for a specific machine type Defaults to x86-64-v3 on AMD64 and armv8-a on AArch64 Use -march=compatibility for best compatibility, or -march=native for best performance if a native executable is deployed on the same machine or on a machine with the same CPU features To list all available machine types, use
- 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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