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Makefile:Add GCC flag -fno-delete-null-pointer-checks

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-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 <rohitarulraj@freescale.com>
Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
This commit is contained in:
Prabhakar Kushwaha 2015-07-02 12:00:17 +05:30 committed by Tom Rini
parent f41d6b7d42
commit 687a7518a1
1 changed files with 1 additions and 0 deletions
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Makefile
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@ -565,6 +565,7 @@ KBUILD_CFLAGS += -DBUILD_TAG='"$(BUILD_TAG)"'
endif endif
KBUILD_CFLAGS += $(call cc-option,-fno-stack-protector) KBUILD_CFLAGS += $(call cc-option,-fno-stack-protector)
KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks)
KBUILD_CFLAGS += -g KBUILD_CFLAGS += -g
# $(KBUILD_AFLAGS) sets -g, which causes gcc to pass a suitable -g<format> # $(KBUILD_AFLAGS) sets -g, which causes gcc to pass a suitable -g<format>