Hi,
I have tested this bug on the FRDM_K64F SDK 2.9.0 (Linux GCC).
When I tried to add some compiler options in the file tools/cmake_toolchain_files/armgcc.cmake once for all instead of editing every flags.cmake, I found the option will occur twice as the example below. In the example, you could find that the default optimization level option O3 occurs twice. However, some options could only occur once! I think the CMAKE files of SDK are configured incorrectly. Could you please check and fix this problem?
boards/frdmk64f/demo_apps/led_blinky/armgcc$ ./build_release.sh
boards/frdmk64f/demo_apps/led_blinky/armgcc$ grep -rn "O3"
CMakeCache.txt:324:CMAKE_CXX_FLAGS_RELEASE:INTERNAL=' -O3 -O3 '
CMakeCache.txt:342:CMAKE_C_FLAGS_RELEASE:INTERNAL=' -O3 -O3 '
Binary file CMakeFiles/led_blinky.elf.dir/home/lwq/mcu_sanitizer_K64F2.9.0/devices/MK64F12/drivers/fsl_clock.c.obj matches
