multiple targets from one recipe and parallel execution

Question

I have a project which includes a code generator which generates several .c and .h files from one input file with just one invocation of the code generator. I have a rule w

Answer 1

Here is the solution that seemed to work for me (credit to @Ivan Zaentsev for the main solution and to @alexei for pointing out the problem with it). It is similar to the original approach with one major change. Instead of generating temporary files (*.gen as suggested), it just touches the files that depend on the INTERMEDIATE file. :

default: f

.INTERMEDIATE: temp
a b c: temp
    touch $@

temp: i1 i2
    echo "BUILD: a b c"
    cat i1 i2 > a
    cat i1 i2 > b
    cat i1 i2 > c

e: a b c
    echo "BUILD: e"
    touch $@

f: e
    echo "BUILD: f"
    touch $@