Add MemorySanitizer support

Makefile

@@ -48,6 +48,8 @@ prefix=/usr/local
 #CONFIG_PROFILE=y
 # use address sanitizer
 #CONFIG_ASAN=y
+# use memory sanitizer
+#CONFIG_MSAN=y
 # include the code for BigInt/BigFloat/BigDecimal and math mode
 CONFIG_BIGNUM=y
 
@@ -127,6 +129,10 @@ ifdef CONFIG_ASAN
 CFLAGS+=-fsanitize=address -fno-omit-frame-pointer
 LDFLAGS+=-fsanitize=address -fno-omit-frame-pointer
 endif
+ifdef CONFIG_MSAN
+CFLAGS+=-fsanitize=memory -fno-omit-frame-pointer
+LDFLAGS+=-fsanitize=memory -fno-omit-frame-pointer
+endif
 ifdef CONFIG_WIN32
 LDEXPORT=
 else
@@ -155,15 +161,15 @@ endif
 
 # examples
 ifeq ($(CROSS_PREFIX),)
-ifdef CONFIG_ASAN
-PROGS+=
-else
+ifndef CONFIG_ASAN
+ifndef CONFIG_MSAN
 PROGS+=examples/hello examples/hello_module examples/test_fib
 ifndef CONFIG_DARWIN
 PROGS+=examples/fib.so examples/point.so
 endif
 endif
 endif
+endif
 
 all: $(OBJDIR) $(OBJDIR)/quickjs.check.o $(OBJDIR)/qjs.check.o $(PROGS)