[PATCH 3/5] Makefile: define GIT_THREAD_SANITIZER

When using ThreadSanitizer (tsan), it can be useful to avoid triggering
false or irrelevant alarms. This should obviously be done with care and
not to paper over real problems. Detecting that tsan is in use in a
cross-compiler way is non-trivial.

Tie into our existing SANITIZE=...-framework and define
GIT_THREAD_SANITIZER when we are compiling for tsan.

Signed-off-by: Martin Ågren <redacted>
---
 Makefile | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Makefile b/Makefile
index 461c845d3..e77a60d1f 100644
--- a/Makefile
+++ b/Makefile

@@ -1033,6 +1033,9 @@ BASIC_CFLAGS += -fno-omit-frame-pointer
 ifneq ($(filter undefined,$(SANITIZERS)),)
 BASIC_CFLAGS += -DNO_UNALIGNED_LOADS
 endif
+ifneq ($(filter thread,$(SANITIZERS)),)
+BASIC_CFLAGS += -DGIT_THREAD_SANITIZER
+endif
 endif
 
 ifndef sysconfdir

-- 
2.14.1.151.gdfeca7a7e