Fix a logic error in the initial introduction of DC_SHA1_EXTERNAL. If
git.git has a sha1collisiondetection submodule checked out the logic
to set DC_SHA1_SUBMODULE=auto would interact badly with the check for
whether DC_SHA1_SUBMODULE was set.
It would error out, meaning that there's no way to build git with
DC_SHA1_EXTERNAL=YesPlease without deinit-ing the submodule.
Instead, adjust the logic to only fire if the variable is to something
else than "auto" which would mean it's a mistake on the part of
whoever's building git, not just the Makefile tripping over its own
logic.
1. 3964cbbb5c ("sha1dc: allow building with the external sha1dc
library", 2017-08-15)
2. cac87dc01d ("sha1collisiondetection: automatically enable when
submodule is populated", 2017-07-01)
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
---
Makefile | 2 ++
1 file changed, 2 insertions(+)
diff --git a/Makefile b/Makefile
index e53750ca01..8fe8278126 100644
--- a/Makefile
+++ b/Makefile
@@ -1497,7 +1497,9 @@ else
LIB_OBJS += sha1dc_git.o
ifdef DC_SHA1_EXTERNAL
ifdef DC_SHA1_SUBMODULE
+ifneq ($(DC_SHA1_SUBMODULE),auto)
$(error Only set DC_SHA1_EXTERNAL or DC_SHA1_SUBMODULE, not both)
+endif
endif
BASIC_CFLAGS += -DDC_SHA1_EXTERNAL
EXTLIBS += -lsha1detectcoll
--
2.15.0.403.gc27cc4dac6
