Confused in a simple MakeFile

[Bijan13]

I have two very similar makefiles for two similar projects, the first one works well, but i get following error message while running the second one:

make: *** No rule to make target `obj/Air.o', needed by `FoRM'. Stop.

----------------
//This works well!

CC=g++
MODEL=Radiation
DEPS = Weather.h Main.h AuxFuncs.h PathLength.h SunEarth.h Tree.h Trend.h
LIBS=-lm
CFLAGS=-O3 -fopenmp
ODIR=obj

_OBJ= Main.o AuxFuncs.o PathLength.o SunEarth.o Tree.o Trend.o Weather.o
OBJ = $(patsubst %,$(ODIR)/%,$(_OBJ))

$(ODIR)/%.o: %.cpp $(DEPS)
$(CC) -c -o $@ $< $(CFLAGS)

$(MODEL): $(OBJ)
$(CC) -o $@ $^ $(CFLAGS) $(LIBS)

all: $(MODEL)

.PHONY: clean

clean:
rm -f $(ODIR)/*.o
rm -f $(MODEL)

run: all
./$(MODEL)


-------------------------------------------------------
//This doesn't work
CC=g++
MODEL=FoRM
DEPS = Air.h AuxFuncs.h ForestPhysics.h FoRM.h Parameters.h Solar.h Terrain.h Tree.h Constant.h
LIBS=-lm
CFLAGS=-O3 -fopenmp
ODIR=obj

_OBJ= Main.o Air.o AuxFuncs.o FoRM.o Solar.o Parameters.o Terrain.o Tree.o ForestPhysics.o
OBJ= $(patsubst %,$(ODIR)/%,$(_OBJ))

$(ODIR)/%.o: %.cpp $(DEPS)
$(CC) -c -o $@ $< $(CFLAGS)

$(MODEL): $(OBJ)
$(CC) -o $@ $^ $(CFLAGS) $(LIBS)

all: $(MODEL)

.PHONY: clean

clean:
rm -f $(ODIR)/*.o
rm -f $(MODEL)

run: all
./$(MODEL)

-----------------------------------------
I'm really confused!
Thanks for any help!

[kooth]

Perhaps you have a stray character that doesn't display in the second one. Try hex dumping the two makefiles to see. This has happened to me a few times.

Another option is to turn on make's debug (usually -d).

[SexyBachelor]

seeing as it complains about Air.o and not Main.o... are you sure Air.cpp is in the directory that Main.cpp is in?

[Bijan13]

Yes Air.cpp is there.!
If I set "ODIR=." instead of "ODIR=obj", both files work well!
but I prefer to have object files in a separate directory like "obj".
That's weird to me!

[Bijan13]

Great! Stray character!![SOLVED]

Thanks kooth!