Updated makefile

Makefile

SRCS = main.c test.c
OBJS = $(SRCS:.c=.o)
EXENAME = test
CFLAGS = -Wall -Wpedantic -Wextra

all: debug

debug: CPPFLAGS += -DDEBUG
debug: CFLAGS += -Og -ggdb
debug: OUTDIR = out/debug
debug: EXE = $(OUTDIR)/$(EXENAME)
debug: prep
debug: executable

release: CPPFLAGS += -DNDEBUG
release: CFLAGS += -Os
release: LDFLAGS += -flto
release: OUTDIR = out/release
release: EXE = $(OUTDIR)/$(EXENAME)
release: prep
release: executable

# If you leave out the forward slash, the entire pattern on line 30 gets skipped.
OBJS := $(addprefix $(OUTDIR)/,$(OBJS))

executable: $(OBJS)
	@echo "Compiling executable $(EXENAME):"
	$(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(OBJS) -o $(EXE)

$(OUTDIR)/%.o: %.c
	@echo "Compiling $@ from $<"
	$(CC) -c $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $< -o $@ 

prep:
	@mkdir -p $(OUTDIR)

clean:
	@rm -f out/debug/*.o 2&>/dev/null || true
	@rm -f out/debug/$(EXENAME) 2&>/dev/null || true

	@rm -f out/release/*.o 2&>/dev/null || true
	@rm -f out/release/$(EXENAME) 2&>/dev/null || true

remake: clean all

output.txt

$ make
Compiling /main.o from main.c
cc -c -DDEBUG -Wall -Wpedantic -Wextra -Og -ggdb  main.c -o /main.o
Assembler messages:
Fatal error: can't create /main.o: Permission denied
make: *** [Makefile:32: /main.o] Error 1