How to concatenate variable in Makefile recipe

user_7041939 0
Viewed 61

I get this Makefile:

LIST = foo bar                                                                  
                                                                                
$(LIST):                                                                        
  echo $@

When I run make targets the outputs works as desired:

$ make foo
echo foo
foo

$ make bar
echo bar
bar

But if I concatenate a string another-, only another-foo works:

LIST = foo bar

another-$(LIST):
  echo $@

$ make another-foo 
echo another-foo
another-foo

$ make another-bar
make: *** No rule to make target 'another-bar'.  Stop.

How can I concatenate a target to expand to all values in my variable?

makefile
1 Answers

The behavior you observe is standard: when writing

another-$(LIST)

make just replaces $(LIST) with its content, yielding another-foo bar.

That is, this has nothing to do with, e.g., a bash brace expression such as another-{foo,bar}.

Yet, you can achieve what you want by doing something like:

LIST = foo bar

$(addprefix another-,$(LIST)):
    echo "$@"
user_91640100
Related