check saintize=undefined on GitHub Action

.github/workflows/main.yml

@@ -25,6 +25,8 @@ jobs:
     - run: make clean
     - run: make test_ci DEBUG=1 -j4 CXX=clang++ MCL_USE_XBYAK=0 MCL_USE_LLVM=0
     - run: make clean
+    - run: make test_ci DEBUG=4 -j4 CXX=clang++
+    - run: make clean
 #    - run: make test_go
 #    - run: sudo apt install openjdk-8-jdk
 #    - run: make -C ffi/java test JAVA_INC=-I/usr/lib/jvm/java-8-openjdk-amd64/include

common.mk

@@ -82,25 +82,24 @@ RM=rm -rf
 DEBUG?=0
 ifeq ($(DEBUG),1)
   ifeq ($(GCC_EXT),1)
-    CFLAGS+=-fsanitize=address
-    LDFLAGS+=-fsanitize=address
+    SANITIZE_OPT?=-fsanitize=address
   endif
 endif
 ifeq ($(DEBUG),2)
   ifeq ($(GCC_EXT),1)
-    CFLAGS+=-fsanitize=memory -fsanitize-memory-track-origins=2
-    LDFLAGS+=-fsanitize=memory -fsanitize-memory-track-origins=2
+    SANITIZE_OPT?=-fsanitize=memory -fsanitize-memory-track-origins=2
   endif
 endif
+ifeq ($(DEBUG),3)
+  # no option
+endif
 ifeq ($(DEBUG),4)
   ifeq ($(GCC_EXT),1)
-    CFLAGS+=-fsanitize=undefined
-    LDFLAGS+=-fsanitize=undefined
+    SANITIZE_OPT?=-fsanitize=undefined -fno-sanitize-recover
   endif
 endif
-ifeq ($(DEBUG),3)
-  # no option
-endif
+CFLAGS+=$(SANITIZE_OPT)
+LDFLAGS+=$(SANITIZE_OPT)
 ifeq ($(DEBUG),0)
   CFLAGS_OPT+=-fomit-frame-pointer -DNDEBUG -fno-stack-protector
   ifeq ($(CXX),clang++)