System Workbench for STM32

GCC ARM Embedded 4.9 update 2 was released on 23 June 2015. The testing ARM project code size generated by different gcc version with Os option are as follows:

gcc 4.7.2: 216524 bytes
gcc 4.8.4: 218408 bytes
gcc 4.9.3 (update 1): 223188 bytes
gcc 4.9.3 (update 2): 223188 bytes