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BZ:https://bugzilla.tianocore.org/show_bug.cgi?id=1764 Some compiler flags restrict the compiler from making arbitrary decisions while handling undefined C/C++ behaviors. Therefore they can be used to fix some issues caused by undefined behavior. For example, for GCC, the following flags are available: -fno-delete-null-pointer-checks tells the compiler NOT to assume that null pointer deference does not exist. -fwrapv tells the compiler that signed overflow always wraps. This patch is going to add these 2 build options to BaseTool GCC build option. Signed-off-by: Bob Feng <bob.c.feng@intel.com> Cc: Liming Gao <liming.gao@intel.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com>