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mk: do not depend on cmp being available

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cmp is part of gnu diffutils which may not be available. Use grep which
is more widespread.

Signed-off-by: Robin Jarry <robin@jarry.cc>
This commit is contained in:
Robin Jarry 2022-04-14 21:47:06 +02:00
parent ba892d7769
commit 02b7f74016
1 changed files with 1 additions and 3 deletions
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4
Makefile
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@ -38,9 +38,7 @@ build_cmd:=$(GO) build $(GOFLAGS) -ldflags "$(GO_LDFLAGS)" -o aerc
# the following command outputs nothing, we only want to execute it once
# and force .aerc.d to be regenerated when build_cmd has changed
_!=echo '$(build_cmd)' > .aerc.tmp; \
cmp -s .aerc.d .aerc.tmp || rm -f .aerc.d; \
rm -f .aerc.tmp
_!=grep -sqFx '$(build_cmd)' .aerc.d || rm -f .aerc.d
.aerc.d:
@echo '$(build_cmd)' > $@