add -Wreturn-type

hathach · hathach · commit ccf17e3cde4c · 2023-03-21T13:21:59.000+07:00
diff --git a/examples/make.mk b/examples/make.mk
@@ -150,6 +150,7 @@ GCC_CFLAGS += \
   -Wnull-dereference \
   -Wuninitialized \
   -Wunused \
+  -Wreturn-type \
   -Wredundant-decls
 
 # conversion is too strict for most mcu driver, may be disable sign/int/arith-conversion
