CODEWITHSUNDEEP
makefileio-redirection
Adam Matan
Adam Matan

Reputation: 136271

Makefile: Use output of one command as argument to other

As a part of the build process, Make creates several .tgz files:

blah_1.tgz blah_2.tgz .... blah_n.tgz

How do I invoke another command (e.g., rsync) on each file?

In bash, I would:

for file in `ls *.tgz`' do rsync $file DESTINATION; done

Or:

ls | grep tgz | xargs rsync {} DESTINATION

But the familiar bash syntax doesn't seem to comply with Make. Any ideas?

Upvotes: 0

Views: 725

Answers (1)

Eldar Abusalimov
Eldar Abusalimov

Reputation: 25503

Hmm... Something like this should work:

TGZ_FILES := blah_1.tgz blah_2.tgz .... blah_n.tgz
RSYNC_TARGETS := $(TGZ_FILES:%=rsync-%)

all : $(RSYNC_TARGETS)

.PHONY : $(RSYNC_TARGETS)
$(RSYNC_TARGETS) : rsync-% : %
    rsync $* DESTINATION

# Omit the following rule
# if .tgz files are made somewhere else (outside Make),
# and you assume they are always up-to-date
$(TGZ_FILES) : %.tgz : ...
    # rule to make each .tgz file

This example uses the following features of GNU Make:

Upvotes: 1

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