Subzero: Fix SUBZERO_REVISION in production builds.
In production autoconf builds (which are the builds that matter), the SUBZERO_REVISION was being calculated based on git history of the top-level native_client repo, rather than the pnacl-subzero repo.
BUG= none
R=jpp@chromium.org, kschimpf@google.com
Review URL: https://codereview.chromium.org/2338943003 .
diff --git a/Makefile b/Makefile
index ca1d4e3..65e459a 100644
--- a/Makefile
+++ b/Makefile
@@ -31,6 +31,8 @@
endif
CPP.Defines += -DPNACL_LLVM
-SZ_COMMIT_COUNT := $(shell git rev-list --count HEAD)
-SZ_GIT_HASH := $(shell git rev-parse HEAD)
+# SUBZERO_SRC_ROOT should already be set, but if not, set to cwd.
+SUBZERO_SRC_ROOT ?= .
+SZ_COMMIT_COUNT := $(shell git -C $(SUBZERO_SRC_ROOT) rev-list --count HEAD)
+SZ_GIT_HASH := $(shell git -C $(SUBZERO_SRC_ROOT) rev-parse HEAD)
CPP.Defines += -DSUBZERO_REVISION=$(SZ_COMMIT_COUNT)_$(SZ_GIT_HASH)
