Makefile: use FUZZ_CXXFLAGS for linking fuzzers

diff --git a/Makefile b/Makefile
index 7f5a19b8ab52188393c590a1ac98910372cd6dfa..507968416dbf9f6091b97a8a29b6cc0f493242b6 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -685,6 +685,7 @@ SCRIPTS = $(SCRIPT_SH_INS) \
 ETAGS_TARGET = TAGS
 
 FUZZ_OBJS += fuzz-pack-headers.o
+FUZZ_OBJS += fuzz-pack-idx.o
 
 # Always build fuzz objects even if not testing, to prevent bit-rot.
 all:: $(FUZZ_OBJS)
@@ -3082,14 +3083,16 @@ cover_db_html: cover_db
 # An example command to build against libFuzzer from LLVM 4.0.0:
 #
 # make CC=clang CXX=clang++ \
-#      CFLAGS="-fsanitize-coverage=trace-pc-guard -fsanitize=address" \
+#      FUZZ_CXXFLAGS="-fsanitize-coverage=trace-pc-guard -fsanitize=address" \
 #      LIB_FUZZING_ENGINE=/usr/lib/llvm-4.0/lib/libFuzzer.a \
 #      fuzz-all
 #
+FUZZ_CXXFLAGS ?= $(CFLAGS)
+
 .PHONY: fuzz-all
 
 $(FUZZ_PROGRAMS): all
-       $(QUIET_LINK)$(CXX) $(CFLAGS) $(LIB_OBJS) $(BUILTIN_OBJS) \
+       $(QUIET_LINK)$(CXX) $(FUZZ_CXXFLAGS) $(LIB_OBJS) $(BUILTIN_OBJS) \
                $(XDIFF_OBJS) $(EXTLIBS) git.o $@.o $(LIB_FUZZING_ENGINE) -o $@
 
 fuzz-all: $(FUZZ_PROGRAMS)