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- riscv cross compiler error: invalid -march= option: `rv64imafdc_zicsr
riscv64-caffeinix-gcc -march=rv64gc -Q --help=target The following options are target specific: -mabi= lp64d -malign-data= xlen -march= rv64imafdc_zicsr_zifencei -mbig-endian [disable] -mbranch-cost=N 3 -mcmodel= medlow -mcpu=PROCESSOR -mcsr-check [disable] -mdiv [enable] -mexplicit-relocs [enable] -mfdiv [enable] -minline-atomics [enable
- What are reasons for -march=native to be detrimental
With -march=native, GCC will likely vectorize loops using the more advanced and more recent AVX instruction set (supported by your processor but not on many old x86 processors) While the use of AVX instruction should speed your program up, it is not always the case in few pathological cases (less efficient code generated by compiler heuristics
- c++ - What exactly does -march=native do? - Stack Overflow
Using -march=native enables all instruction subsets supported by the local machine (hence the result might not run on different machines) Using -mtune=native produces code optimized for the local machine under the constraints of the selected instruction set "
- 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 –
- what is march parameter when compile a c file - Stack Overflow
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- Apple M1 Docker error cc1plus: error: unknown value armv8-a-march . . .
There are a couple of issues to address The dockerfile as you have it will download a base golang ARM image, and try to use that to build
- 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=target $ gcc -Q -march=skylake-avx512 --help=target Please note, for the avoidance of doubt, the detected arch output from using -march=native is skylake-avx512
- linux - How to fix error: bad value (native) for -march= switch and . . .
The problem is that the driver code is not working, and the bug is that gcc doesn't handle that [-march=native] correctly There is some code in gcc to handle the driver code failing, and it works for -mtune=native, but not for -march=native The driver code is supposed to change the -march=native to be -march=XXX for your CPU
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