Why is -march=native not enabled by default by compilers/IDEs?
Oct 5, 2018 · 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 …
gcc - How is -march different from -mtune? - Stack Overflow
Oct 12, 2024 · -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 …
What are my available march/mtune options? - Stack Overflow
Nov 5, 2018 · 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 …
gcc - Error: bad value for -march= switch - Stack Overflow
Dec 10, 2012 · Error: bad value for -march= switch Asked 13 years, 1 month ago Modified 10 years, 5 months ago Viewed 8k times
cc1: error: bad value (‘armv8-a’) for ‘-march=’ switch
Mar 6, 2020 · I am currently following this guide and trying to build my u-boot. The issue I am facing is the following error: cc1: warning: unknown register name: x18 cc1: error: bad value (‘armv8-a’) for ‘ …
unrecognized command-line option '-arch'; did you mean '-march='?
unrecognized command-line option '-arch'; did you mean '-march='? Asked 4 years, 6 months ago Modified 1 year, 7 months ago Viewed 3k times
Why does march=native not work on Apple M1? - Stack Overflow
Jan 30, 2021 · When you say it used to work on an older MacBook, was it the same version of Clang? What does clang --version say on the two systems?
"clang compiler does not support -march=armv8.2-a+i8mm" during ...
Aug 29, 2023 · Internet search for "-march=armv8.2-a+i8mm" turns up nearly nothing helpful. Either build_aar.sh is asking for an arch that doesn't make sense, or I need to plug in a version of clang that …
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...
How to see which flags -march=native will activate?
Mar 29, 2011 · 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 …