GNU make rule for multiple targets
makefile
Solution
If you run a rule that depends on `a`, it will run your rule with `$<` as `test` and `$@` as `a`. If you run a rule that depends on `b`, `$@` will be `b` instead. If you make a rule above your current rule like:
all: a b
It will run the rules for `a` and `b`, which is that same rule twice. Otherwise, if your rule is the first in the file it will run it with the first target only, which is `a`
Problem
I'm trying to get GNU make to produce multiple outputs from a single input. The most simple example I can demonstrate is: ``` a b : test cp $< $@ ``` which, I believe, should copy the file `test` to the files name `a` and `b`. However, it only makes the file `a`, which seems to me to be contrary to the instructions listed here: http://www.gnu.org/software/automake/manual/make/Multiple-Targets.html Am I doing something wrong? Thanks, Tom