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sha1collisiondetection: automatically enable when submodule is populated 

If a user wants to experiment with the version of collision
detecting sha1 from the submodule, the user needed to not just
populate the submodule but also needed to turn the knob.

A Makefile trick is easy enough to do so, so let's do this.  When
somebody with a copy of the submodule populated wants not to use it,
that can be done by overriding it in config.mak or from the command
line.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
maint
Junio C Hamano 2017-07-01 22:05:47 +00:00
parent 86cfd61e6b
commit cac87dc01d
1 changed files with 4 additions and 0 deletions
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Makefile
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@ -989,6 +989,10 @@ EXTLIBS =


GIT_USER_AGENT = git/$(GIT_VERSION) GIT_USER_AGENT = git/$(GIT_VERSION)


ifeq ($(wildcard sha1collisiondetection/lib/sha1.h),sha1collisiondetection/lib/sha1.h)
DC_SHA1_SUBMODULE = auto
endif

include config.mak.uname include config.mak.uname
-include config.mak.autogen -include config.mak.autogen
-include config.mak -include config.mak