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infra/utils: add helper to generate comma-separated lists

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Add a helper macro that, from a space-separated list of items, returns a
comma-separated list of the quoted items.

This will be useful when we need to generate lists in JSON, later...

Code suggested by Thomas P.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas De Schampheleire <patrickdepinguin@gmail.com>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: Arnout Vandecappelle <arnout@mind.be>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
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Yann E. MORIN 2019-04-15 21:47:27 +02:00 committed by Arnout Vandecappelle (Essensium/Mind)
parent 5a0d681394
commit 9bde598ced
1 changed files with 4 additions and 0 deletions
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support/misc/utils.mk
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@ -70,6 +70,10 @@ finddirclauses = $(call notfirstword,$(patsubst %,-o -path '$(1)/%',$(2)))
# notfirstword(wordlist): returns all but the first word in wordlist
notfirstword = $(wordlist 2,$(words $(1)),$(1))
# build a comma-separated list of quoted items, from a space-separated
# list of unquoted items: a b c d --> "a", "b", "c", "d"
make-comma-list = $(subst $(space),$(comma)$(space),$(patsubst %,"%",$(strip $(1))))
# Needed for the foreach loops to loop over the list of hooks, so that
# each hook call is properly separated by a newline.
define sep