f4vi1: Add -mno-thumb-interwork.

Cortex-M processors only support Thumb instructions (no ARM mode code).

Signed-off-by: Joakim Gebart <joakim.gebart@eistec.se>

boards/f4vi1/Makefile.include

@@ -31,10 +31,10 @@ export DEBUGSERVER = st-util
 # define build specific options
 CPU_USAGE = -mcpu=cortex-m4
 FPU_USAGE = -mfloat-abi=hard -mfpu=fpv4-sp-d16
-export CFLAGS += -ggdb -g3 -std=gnu99 -Os -Wall -Wstrict-prototypes $(CPU_USAGE) $(FPU_USAGE) -mlittle-endian -mthumb -mthumb-interwork -nostartfiles
+export CFLAGS += -ggdb -g3 -std=gnu99 -Os -Wall -Wstrict-prototypes $(CPU_USAGE) $(FPU_USAGE) -mlittle-endian -mthumb -mno-thumb-interwork -nostartfiles
 export CFLAGS += -ffunction-sections -fdata-sections -fno-builtin
 export ASFLAGS += -ggdb -g3 $(CPU_USAGE) $(FPU_USAGE) -mlittle-endian
-export LINKFLAGS += -g3 -ggdb -std=gnu99 $(CPU_USAGE) $(FPU_USAGE) -mlittle-endian -static -lgcc -mthumb -mthumb-interwork -nostartfiles
+export LINKFLAGS += -g3 -ggdb -std=gnu99 $(CPU_USAGE) $(FPU_USAGE) -mlittle-endian -static -lgcc -mthumb -mno-thumb-interwork -nostartfiles
 export LINKFLAGS += -T$(LINKERSCRIPT)
 export OFLAGS = -O binary
 export FFLAGS = write bin/$(BOARD)/$(APPLICATION).hex 0x8000000