Compiler:

-c -fmessage-length=0 -mlittle-endian -mthumb -mcpu=cortex-m4 -mthumb-interwork -mfloat-abi=hard -mfpu=fpv4-sp-d16 -nostartfiles

Linker:

-mlittle-endian -mthumb -mcpu=cortex-m4 -mthumb-interwork -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Tstm32_flash.ld -Wl,-Map=mapfile.map --disable-newlib-supplied-syscalls -nostartfiles