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+# ##########################################################################
+# LZ4 oss fuzzer - Makefile
+#
+# GPL v2 License
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# You can contact the author at :
+# - LZ4 homepage : http://www.lz4.org
+# - LZ4 source repository : https://github.com/lz4/lz4
+# ##########################################################################
+# compress_fuzzer : OSS Fuzz test tool
+# decompress_fuzzer : OSS Fuzz test tool
+# ##########################################################################
+
+LZ4DIR := ../lib
+LIB_FUZZING_ENGINE ?= standaloneengine.o
+
+DEBUGLEVEL?= 1
+DEBUGFLAGS = -g -DLZ4_DEBUG=$(DEBUGLEVEL)
+
+LZ4_CFLAGS = $(CFLAGS) $(DEBUGFLAGS) $(MOREFLAGS)
+LZ4_CXXFLAGS = $(CXXFLAGS) $(DEBUGFLAGS) $(MOREFLAGS)
+LZ4_CPPFLAGS = $(CPPFLAGS) -I$(LZ4DIR) -DXXH_NAMESPACE=LZ4_
+
+# Include a rule to build the static library if calling this target
+# directly.
+$(LZ4DIR)/liblz4.a:
+ $(MAKE) -C $(LZ4DIR) CFLAGS="$(LZ4_CFLAGS)" liblz4.a
+
+%.o: %.c
+ $(CC) -c $(LZ4_CFLAGS) $(LZ4_CPPFLAGS) $< -o $@
+
+# Generic rule for generating fuzzers
+%_fuzzer: %_fuzzer.o $(LZ4DIR)/liblz4.a
+ # Compile the standalone code just in case. The OSS-Fuzz code might
+ # override the LIB_FUZZING_ENGINE value to "-fsanitize=fuzzer"
+ $(CC) -c $(LZ4_CFLAGS) $(LZ4_CPPFLAGS) standaloneengine.c -o standaloneengine.o
+
+ # Now compile the actual fuzzer.
+ $(CXX) $(LZ4_CXXFLAGS) $(LZ4_CPPFLAGS) $(LDFLAGS) $(LIB_FUZZING_ENGINE) $^ -o $@$(EXT)
+
+%_fuzzer_clean:
+ $(RM) $*_fuzzer $*_fuzzer.o standaloneengine.o
+
+.PHONY: clean
+clean: compress_fuzzer_clean decompress_fuzzer_clean