Hi,
I am trying to make the prerequisites of a target depend on the current
target by taking into account the current value of %.
In the example below, I have a main (tex) file, with dependencies on a
number of included files. These dependencies are indicated in variables
with the name of the main file, with '_depend' appended to them. My
strategy is then to create a variable DEPEND, depending on %.pdf, which
contains the name of the variable that contains these dependencies, and
use this variable in the prerequisites.
Unfortunately, this does not seem to work: $($(DEPEND)) does contain the
right dependency, yet it does not seem to be present in the
prerequisites. As a result, 'touching' the dependency does not trigger a
rebuild when I run make for the second time.
What might I be going wrong and/or is what I want to do even possible?
Many thanks!
Yves
<-- Makefile -->
texfiles = main.tex
main_depend = section1.tex
all_pdf = $(texfiles:.tex=.pdf)
all: $(all_pdf)
%.pdf: DEPEND = $(@:.pdf=)_depend
%.pdf: %.tex $($(DEPEND))
@echo "Extra dependencies:" $($(DEPEND))
@echo "All prerequisites:" $^
touch $@
touch $($(DEPEND))
<-- end Makefile --->
