Cortex-m3 -mcpu=cortex-m3 -mthumb -mfloat-abi=soft -O3 Cortex-m4 -mcpu=cortex-m4 -mthumb -mfloat-abi=hard -mfpu=fpv4-sp-d16 -O3 * If you want to use SIMD -DSTM32F4 - end of file -
