From 687a7518a1b1e40e005711603dcb14e0f6942d6d Mon Sep 17 00:00:00 2001 From: Prabhakar Kushwaha Date: Thu, 2 Jul 2015 12:00:17 +0530 Subject: [PATCH] Makefile:Add GCC flag -fno-delete-null-pointer-checks -fdelete-null-pointer-checks flag controls global dataflow analyses and eliminate useless checks for null pointers; It assume that if a pointer is checked after it has already been dereferenced, it cannot be null. This flag is enabled by default. gcc v4.9 has more optimizations added to this option. Hence it is very aggressive with GCC v4.9 series. Add -fno-delete-null-pointer-checks to disable the optimization Signed-off-by: Rohit Dharmakan Signed-off-by: Prabhakar Kushwaha --- Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/Makefile b/Makefile index 37cc4c3fa4..0dc6c53fcf 100644 --- a/Makefile +++ b/Makefile @@ -565,6 +565,7 @@ KBUILD_CFLAGS += -DBUILD_TAG='"$(BUILD_TAG)"' endif KBUILD_CFLAGS += $(call cc-option,-fno-stack-protector) +KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks) KBUILD_CFLAGS += -g # $(KBUILD_AFLAGS) sets -g, which causes gcc to pass a suitable -g -- 2.39.5