applypatch: Add a Makefile to build imgdiff in Chrome OS.
Also fixed some warnings and added check for target_len.
Test: mma; emerge-peppy imgdiff; emerge-nyan imgdiff; sudo emerge imgdiff
Bug: 26866274
Change-Id: Ifbcd3afd6701c769ccf626e33ed94461706f7ee6
diff --git a/applypatch/Makefile b/applypatch/Makefile
new file mode 100644
index 0000000..fa6298d
--- /dev/null
+++ b/applypatch/Makefile
@@ -0,0 +1,32 @@
+# Copyright (C) 2016 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This file is for building imgdiff in Chrome OS.
+
+CPPFLAGS += -iquote..
+CXXFLAGS += -std=c++11 -O3 -Wall -Werror
+LDLIBS += -lbz2 -lz
+
+.PHONY: all clean
+
+all: imgdiff libimgpatch.a
+
+clean:
+ rm -f *.o imgdiff libimgpatch.a
+
+imgdiff: imgdiff.o bsdiff.o utils.o
+ $(CXX) $(CPPFLAGS) $(CXXFLAGS) $(LDLIBS) -o $@ $^
+
+libimgpatch.a: imgpatch.o bspatch.o utils.o
+ ${AR} rcs $@ $^