GNU make doesn't include headerfile - c

Question

I have been searching for 6 hours and I can't seem to find the issue with this GNU make file, everytime I try to compile by main.o by the order
make main.o
it gives me this error:
arm-none-eabi-gcc -c main.c -mcpu=cortex-m4 -mthumb --
specs=nosys.specs -Wall -Werror -g -O0 -std=c99 -o main.o
main.c:23:22: fatal error: platform.h: No such file or directory
#include "platform.h"
^
compilation terminated.
Makefile:52: recipe for target 'main.o' failed
make: *** [main.o] Error 1
makefile:
include sources.mk
# Platform Overrides
PLATFORM = MSP432
# Architectures Specific Flags
LINKER_FILE = msp432p401r.lds
CPU = cortex-m4
ARCH = thumb
SPECS = nosys.specs
# Compiler Flags and Defines
CC = arm-none-eabi-gcc
LD = arm-none-eabi-ld
TARGET = c1m1
LDFLAGS = -Wl,-Map=$(TARGET).map -T $(LINKER_FILE)
CFLAGS = -mcpu=$(CPU) -m$(ARCH) --specs=$(SPECS) -Wall -Werror -g -O0 -std=c99
CPPFLAGs =
.PHONY: all
all: $(TARGET).out
.PHONY: clean
clean:
rm -f $(OBJS) $(TARGET).out $(TARGET).map
%.o : %.c
$(CC) -c $< $(CFLAGS) -o $#
OBJS = $(SOURCES:.c=.o)
$(TARGET).out: $(OBJS)
$(CC) $(OBJS) $(CFLAGS) $(LDFLAGS) -o $#
sources.mk:
# Add your Source files to this variable
SOURCES =./main.c \
./memory.c \
./startup_msp432p401r_gcc.c \
./system_msp432p401r.c \
./interrupts_msp432p401r_gcc.c
# Add your include paths to this variable
INCLUDES =-I./include/CMSIS \
-I./include/common \
-I./include/msp432
here's my code on github:
github repository

Answer 1

You have not used the INCLUDES macro in makefile's CFLAGS macro. Consequently the arm-none-eabi-gcc ... command line does not specify the include paths to the compiler (or strictly the pre-processor).
CFLAGS = -mcpu=$(CPU) -m$(ARCH) --specs=$(SPECS) $(INCLUDES) -Wall -Werror -g -O0 -std=c99
^^^^^^^^^^^