Thread: makefile problems

Hi,
I'm playing around with makefiles on Linux and I can't quite figure out what's wrong with this one:

Code:

# makefile for test build.
###########################################################

CC = g++
CDEBUG = -g3
CRELEASE = -O3
DEFS =
CFLAGS = -I. $(DEFS) -c -pedantic-errors
LDFLAGS =
OBJS = main.o
DEBUG_PATH = debug
RELEASE_PATH = release
TARGET = main

clean:
	rm -f $(DEBUG_PATH)/*.o  $(DEBUG_PATH)/$(TARGET)
	rm -f $(RELEASE_PATH)/*.o  $(RELEASE_PATH)/$(TARGET)
	rmdir $(DEBUG_PATH)
	rmdir $(RELEASE_PATH)

all:	debug release

debug:	$(DEBUG_PATH)  $(DEBUG_PATH)/$(OBJS)
	cd $(DEBUG_PATH)
	$(CC) $(LDFLAGS) $(OBJS) -o $(TARGET)

release:	$(RELEASE_PATH)  $(RELEASE_PATH)/$(OBJS)
	cd $(RELEASE_PATH)
	$(CC) $(LDFLAGS) $(OBJS) -o $(TARGET)

$(DEBUG_PATH):
	mkdir $(DEBUG_PATH)

$(RELEASE_PATH):
	mkdir $(RELEASE_PATH)

$(DEBUG_PATH)/main.o:	main.cpp
	cd $(DEBUG_PATH)
	$(CC) $(CDEBUG) $(CFLAGS) ../main.cpp

$(RELEASE_PATH)/main.o:	main.cpp
	cd $(RELEASE_PATH)
	$(CC) $(CRELEASE) $(CFLAGS) ../main.cpp

If I run make debug it barfs out all these errors:

Code:

makefile:32: warning: overriding commands for target `debug'
makefile:24: warning: ignoring old commands for target `debug'
makefile:35: warning: overriding commands for target `release'
makefile:28: warning: ignoring old commands for target `release'
make: Circular debug <- debug dependency dropped.
cd debug
/bin/sh: line 0: cd: debug: No such file or directory
make: *** [debug/main.o] Error 1

Here's main.cpp in case it matters:

Code:

// main.cpp
/////////////////////////////////////////////////////////////////////
#include <iostream>
using namespace std;

int main()
{
	cout << "Hello World!" << endl;
	return 0;
}

Can someone explain what those warnings mean and especially why the debug directory isn't being created?