nix-super/mk/functions.mk

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# Utility function for recursively finding files, e.g.
# $(call rwildcard, path/to/dir, *.c *.h).
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rwildcard=$(foreach d,$(wildcard $1*),$(call rwildcard,$d/,$2) $(filter $(subst *,%,$2),$d))
# Given a file name, produce the corresponding dependency file
# (e.g. foo/bar.o becomes foo/.bar.o.dep).
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filename-to-dep = $(dir $1).$(notdir $1).dep
# Return the full path to a program by looking it up in $PATH, or the
# empty string if not found.
find-program = $(shell for i in $$(IFS=: ; echo $$PATH); do p=$$i/$(strip $1); if [ -e $$p ]; then echo $$p; break; fi; done)
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# Ensure that the given string ends in a single slash.
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add-trailing-slash = $(patsubst %/,%,$(1))/