On Wed, 2015-03-25 at 02:54 -0700, guylobster wrote:
> this is the first time I do a makefile.
> But I block to assign the result of my python script to a variable of my
> makefile.
> The function works. Here the function and the result.
>
> *My makefile*
> G_SIZE=10
> Quake:
> python estimationkmer.py $(G_SIZE)
> ESTK=$(python estimationkmer.py $(G_SIZE))
> echo $(ESTK)
You have three problems here:
First you have to escape dollar signs which you want to be passed to the
shell:
ESTK=$$(python estimationkmer.py $(G_SIZE))
(note the double "$$" here) to escape the "$" so make passes it to your
shell.
The second problem is that make invokes every line of a recipe as a
separate shell script, so variables assigned in one line are lost before
the next line. If you want to set a shell variable and use it again you
have to put both commands in the same shell:
ESTK=$$(python estimationkmer.py $(G_SIZE)) ; \
echo $$ESTK
Finally, note this is setting a SHELL variable.
You can't set a MAKE variable from within a recipe, because recipes are
passed to the shell and run there. If you want to set a make variable
you have to do it outside of a recipe, using make's shell function:
ESTK := $(shell python estimationkmer.py $(G_SIZE))
Quake:
echo $(ESTK)
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