cmake GNU makefile link too long commandline

cmake generated a makefile line that is about 8400 characters long for the link step. Too long for windows limit.

the file build.make contains :

XXXXX_EXTERNAL_OBJECTS =
XXXX_OBJECTS = \
"file.c.obj" \
"file.c.obj" \
"file.c.obj" \
"file.c.obj" \

C:/YYYY/GNU_Tools_ARM_Embedded/6-2016-q4-major/bin/arm-none-eabi-gcc.exe  -mcpu=cortex-m4  -mthumb -DSTM32L496xx -mfloat-abi=softfp -DXXXX -O0 -g -Wfatal-errors -Wall -Wno-unused-function -std=c99 -fdata-sections -ffunction-sections  -mcpu=cortex-m4  -march=armv7e-m -O0 -g --specs=nano.specs -mthumb -Wl,--gc-sections -nostartfiles -Wl,-Map=$@.map -TC:SSSSSSSSS/STM32L496RGTx_FLASH.ld $(XXXX_OBJECTS) $(XXXXX_EXTERNAL_OBJECTS)  -o outHexFile_XXXX  -LC:/YYYYYYYYYYYYYYYY/arm-nano-eabi/lib

XXXX_OBJECTS is about 7700 char and this leads to total 8400 char in command line making link fail.