Suppress and ignore output for Makefile?

Question

I know that the @ prefix suppresses output from a shell command in Makefiles, and also that the - prefix will ignore errors from a shell command. I

Answer 1

GNU make does allow you to combine both @ and -:

all:
        @-exit 1

Running this with gmake 3.81 produces this output:

gmake: [all] Error 1 (ignored)

As you can see, the command is not echoed, and the error is ignored as expected.