--- a/Makefile	2024-03-16 14:02:10.458220600 +0800
+++ b/Makefile	2024-03-16 14:06:02.219544200 +0800
@@ -79,7 +79,7 @@ ifdef CONFIG_CLANG
   CFLAGS += -Wchar-subscripts -funsigned-char
   CFLAGS += -MMD -MF $(OBJDIR)/$(@F).d
   ifdef CONFIG_DEFAULT_AR
-    AR=$(CROSS_PREFIX)ar
+    AR?=$(CROSS_PREFIX)ar
   else
     ifdef CONFIG_LTO
       AR=$(CROSS_PREFIX)llvm-ar
@@ -106,7 +106,7 @@ else
     AR=$(CROSS_PREFIX)ar
   endif
 endif
-STRIP=$(CROSS_PREFIX)strip
+STRIP?=$(CROSS_PREFIX)strip
 CFLAGS+=-fwrapv # ensure that signed overflows behave as expected
 ifdef CONFIG_WERROR
 CFLAGS+=-Werror
@@ -283,7 +283,7 @@ $(OBJDIR)/%.o: %.c | $(OBJDIR)
 	$(CC) $(CFLAGS_OPT) -c -o $@ $<
 
 $(OBJDIR)/%.host.o: %.c | $(OBJDIR)
-	$(HOST_CC) $(CFLAGS_OPT) -c -o $@ $<
+	$(HOST_CC) -fwrapv $(DEFINES) -O2 -c -o $@ $<
 
 $(OBJDIR)/%.pic.o: %.c | $(OBJDIR)
 	$(CC) $(CFLAGS_OPT) -fPIC -DJS_SHARED_LIBRARY -c -o $@ $<
@@ -307,7 +307,7 @@ regexp_test: libregexp.c libunicode.c cu
 	$(CC) $(LDFLAGS) $(CFLAGS) -DTEST -o $@ libregexp.c libunicode.c cutils.c $(LIBS)
 
 unicode_gen: $(OBJDIR)/unicode_gen.host.o $(OBJDIR)/cutils.host.o libunicode.c unicode_gen_def.h
-	$(HOST_CC) $(LDFLAGS) $(CFLAGS) -o $@ $(OBJDIR)/unicode_gen.host.o $(OBJDIR)/cutils.host.o
+	$(HOST_CC) $(LDFLAGS) -fwrapv $(DEFINES) -o $@ $(OBJDIR)/unicode_gen.host.o $(OBJDIR)/cutils.host.o
 
 clean:
 	rm -f repl.c qjscalc.c out.c