build: add a sanitizer debug option
Building & running with ASAN is super helpful, so add a dedicated config
knob for it. This way people don't have to guess at the right compiler
settings in order to get a good build. We can just tell people to enable
this one option.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/Makefile.flags b/Makefile.flags
index 9f77674..65021de 100644
--- a/Makefile.flags
+++ b/Makefile.flags
@@ -75,6 +75,11 @@
CFLAGS += $(call cc-option,-Os,$(call cc-option,-O2,))
endif
endif
+ifeq ($(CONFIG_DEBUG_SANITIZE),y)
+CFLAGS += $(call cc-option,-fsanitize=address,)
+CFLAGS += $(call cc-option,-fsanitize=leak,)
+CFLAGS += $(call cc-option,-fsanitize=undefined,)
+endif
# If arch/$(ARCH)/Makefile did not override it (with, say, -fPIC)...
ARCH_FPIC ?= -fpic