makefile gnu make中的@是什么意思？

Question

For example if i write

       ->@ %echo "Hello"

it print Hello in the console

       ->Hello  

what is @ in the case and %?

Answer 1

By default GNU Make print the command before executing it (ie recipe echoing), using @ you'll hide it like set -x/set +x in bash script...

src: https://www.gnu.org/software/make/manual/make.html#Echoing