From f8d15d6f3fa6c8c3efa08665a19d3d93ef8b6724 Mon Sep 17 00:00:00 2001
From: Ying Wang <wangying@google.com>
Date: Tue, 26 Apr 2016 15:49:56 -0700
Subject: [PATCH] Warn if there is file with unknown suffix in Java module's
 sources.

This helps catch extra ) at the end of LOCAL_SRC_FILES.

Bug: 28389144
Change-Id: I0ab536b5bb47338ebf5bdf531835d58f527ccf67
---
 core/java_common.mk | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/core/java_common.mk b/core/java_common.mk
index e17691bc4..1b12ea23b 100644
--- a/core/java_common.mk
+++ b/core/java_common.mk
@@ -133,6 +133,15 @@ else
   extra_jar_args :=
 endif # java_resource_file_groups
 
+#####################################
+## Warn if there is unrecognized file in LOCAL_SRC_FILES.
+my_unknown_src_files := $(filter-out \
+  %.java %.aidl %.proto %.logtags %.fs %.rs, \
+  $(LOCAL_SRC_FILES) $(LOCAL_INTERMEDIATE_SOURCES) $(LOCAL_GENERATED_SOURCES))
+ifneq ($(my_unknown_src_files),)
+$(warning $(LOCAL_MODULE_MAKEFILE): $(LOCAL_MODULE): Unused source files: $(my_unknown_src_files))
+endif
+
 ######################################
 ## PRIVATE java vars
 # LOCAL_SOURCE_FILES_ALL_GENERATED is set only if the module does not have static source files,