Hello.
I want to define and use environemtn variables in the command part of a
rule in a makefile. The variables will capture the output of some
commands.
For instance, I would like to have something like the following:
%.a : %.txt
p=$$(cat $< | wc -l)
q=$$((p+10))
echo $$q > $@
That is, I want to:
* set $p to the number of lines in the prerequisite file $<, s
* set $q to that value plus 10
* create the target file using $q
How to correctly writhe this rule?
Romildo
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