I have built a make file for my project, and it works (everything compiles) but it gives these irritating error messages:

make: Circular zpr.c <- zpr.o dependency dropped.
gcc -Wall   -c -o zpr.o zpr.c
make: Circular readjpeg.c <- readjpeg.o dependency dropped.
gcc -Wall   -c -o readjpeg.o readjpeg.c
make: Circular readppm.c <- readppm.o dependency dropped.
gcc -Wall   -c -o readppm.o readppm.c
make: Circular SceneNode.cpp <- SceneNode.o dependency dropped.
g++    -c -o SceneNode.o SceneNode.cpp
make: Circular BoundingBoxNode.cpp <- BoundingBoxNode.o dependency dropped.
g++    -c -o BoundingBoxNode.o BoundingBoxNode.cpp
make: Circular GeometryNode.cpp <- GeometryNode.o dependency dropped.
g++    -c -o GeometryNode.o GeometryNode.cpp
make: Circular SceneGraph.cpp <- SceneGraph.o dependency dropped.
g++    -c -o SceneGraph.o SceneGraph.cpp
make: Circular testgraph.cpp <- testgraph.o dependency dropped.
g++    -c -o testgraph.o testgraph.cpp

My makefile is not complicated at all so hopefully someone can spot the error.

GXX=g++
CC=gcc
CFLAGS=-Wall

LIBS=-lGL -lglut -ljpeg

OBJS=helpers.o loadobj.o zpr.o readjpeg.o readppm.o SceneNode.o BoundingBoxNode.o GeometryNode.o SceneGraph.o  testgraph.o
OBJS2=testgraph.o SceneGraph.o GeometryNode.o BoundingBox.o SceneNode.o readppm.o readjpeg.o zpr.o loadobj.o helpers.o
SRCS=testgraph.cpp SceneGraph.cpp SceneNode.cpp

.o.cpp:
    $(GXX) $(CFLAGS) -c $<

.o.c:
    $(CC) $(CFLAGS) -c $<

testgraph: $(OBJS)
    $(GXX) $(LIBS) $(OBJS) -o testgraph

clean:
    rm *.o
makefile
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