Use clang and ftrapv

b/12203995

Change-Id: Ie254ac8806178fb066ab77b09d89c730bf9e949b
diff --git a/libexif/Android.mk b/libexif/Android.mk
index 55cbee6..effa0c4 100644
--- a/libexif/Android.mk
+++ b/libexif/Android.mk
@@ -20,6 +20,8 @@
 # WARNING: this makefile builds a shared library. Do not ever make it build
 # a static library or otherwise statically link libexif with your code.
 
+LOCAL_CLANG := true
+
 LOCAL_C_INCLUDES := \
     $(TOP)/external/libexif
 
@@ -57,6 +59,8 @@
 	libutils \
 	liblog
 
+LOCAL_CFLAGS += -ftrapv
+
 include $(BUILD_SHARED_LIBRARY)
 
 # WARNING: this makefile builds a shared library. Do not ever make it build