makefile - How can you make a % wildcard make rule phony?

Question

I have the following wildcard "programming" make rule that uploads a binary to a device. This obviously does not produce a real file, so should be marked phony. However, how do you mark a % percent wildcard rule phony?

%-tangnano-prog: %-tangnano.fs
    openFPGALoader -b tangnano $^

.PHONY: %-tangnano-prog clean all

The phony rule does not give any error whatever you put there, so hard to tell if it worked. But I believe it did not:

$ touch blinky-tangnano-prog
$ make blinky-tangnano-prog
make: 'blinky-tangnano-prog' is up to date.

Answer 1

Thee are basically two possibilities:

1. You know in advance what %-tangnano-prog targets you can encounter. Just assign all their prefixes to a make variable, use make functions to compute the full target names and declare them as phony:

    P := blinky foo bar
    T := $(addsuffix -tangnano-prog,$(P))
   
    .PHONY: tangnano-prog $(T)
   
    tangnano-prog: $(T)
   
    %-tangnano-prog: %-tangnano.fs
        openFPGALoader -b tangnano $^
   

2. You do not know in advance what targets you can encounter. Use the same Makefile but pass the list of target prefixes to build on the command line:

    $ make tangnano-prog P="blinky foo bar"