what is the difference with and without crc extension support

Hi, My program does not use CRC instructions，but I find the compiled binary has much difference between using "-march=armv8-a+crc" and using "-march=armv8-a". Even stranger, when I use "-march=armv8-a+crc", I find my compiled binary can not run. but when I change -O2 to -O0 based on "-march=ar

Re: what is the difference with and without crc extension support

On 3/3/22 14:41, Dongjiu Geng via Gcc wrote: Hi, My program does not use CRC instructions，but I find the compiled binary has much difference between using "-march=armv8-a+crc" and using "-march=armv8-a". Even stranger, when I use "-march=armv8-a+crc", I find my compiled binary can not run.

Re: what is the difference with and without crc extension support

Thanks for the answer, my source file is complex，it is not convenient attach, because it is company code. According to your experience， what is the reason about it? Martin Liška 于2022年3月3日周四 21:48写道： > > On 3/3/22 14:41, Dongjiu Geng via Gcc wrote: > > Hi, > > My program does not use CRC

gcc-9-20220303 is now available

Snapshot gcc-9-20220303 is now available on https://gcc.gnu.org/pub/gcc/snapshots/9-20220303/ and on various mirrors, see http://gcc.gnu.org/mirrors.html for details. This snapshot has been generated from the GCC 9 git branch with the following options: git://gcc.gnu.org/git/gcc.git branch