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"Инициатива по передаче в основное ядро Linux специфичных для..." Отправлено Акакжев, 23-Ноя-18 15:03
> Судя по названию опции, она как раз отключает удаление таких проверок компилятором > на этапе оптимизиации.        -fdelete-null-pointer-checks            Assume that programs cannot safely dereference null pointers, and that no code or data element resides at address zero.            This option enables simple constant folding optimizations at all optimization levels.  In addition, other optimization            passes in GCC use this flag to control global dataflow analyses that eliminate useless checks for null pointers; these            assume that a memory access to address zero always results in a trap, so that if a pointer is checked after it has already            been dereferenced, it cannot be null.            Note however that in some environments this assumption is not true.  Use -fno-delete-null-pointer-checks to disable this            optimization for programs that depend on that behavior.            This option is enabled by default on most targets.  On Nios II ELF, it defaults to off.  On AVR, CR16, and MSP430, this            option is completely disabled.