# Exerpts from a makefile

####### Compiler, tools and options

CC            = gcc     # executable for C compiler
CXX           = g++     # executable  for c++ compiler
LINK          = g++     # executable for linker

# flags that get passed to the compiler
CFLAGS        = -pipe -g -Wall -W -D_REENTRANT $(DEFINES)
CXXFLAGS      = -pipe -g -Wall -W -D_REENTRANT $(DEFINES)
INCPATH       = -I/usr/local/qt/mkspecs/default -I. \
                -I$(QT4)/include/QtGui -I$(QT4)/include/QtCore \
                -I$(QT4)/include

# Linker flags
LIBS          = $(SUBLIBS) -L$(QT4)/lib -lQtCore_debug -lQtGui_debug -lpthread
LFLAGS        = -Wl,-rpath,$(QT4)/lib

# macros for performing other operations as part of build steps:
QMAKE         = /usr/local/qt/bin/qmake

####### Files

HEADERS       =    # If we had some, they'd be here. 
SOURCES       = main.cpp
OBJECTS       = main.o
[snip]
QMAKE_TARGET  = qapp
DESTDIR       = 
TARGET        = qapp  # default target to build

first: all            # to build "first" we must build "all"

####### Implicit rules

.SUFFIXES: .c .o .cpp .cc .cxx .C

.cpp.o:
	$(CXX) -c $(CXXFLAGS) $(INCPATH) -o $@ $<

## Possible targets to build

all: Makefile $(TARGET)  # this is how to build "all"

$(TARGET):  $(OBJECTS) $(OBJMOC)    # this is how to build qapp
	$(LINK) $(LFLAGS) -o $(TARGET) $(OBJECTS) $(OBJMOC) $(OBJCOMP) \
    $(LIBS)

        qmake:  FORCE               # "qmake" is a target too! 
	@$(QMAKE) -o Makefile qapp.pro  # what does it do?

dist:                               # Another target 
	@mkdir -p .tmp/qapp \
    && $(COPY_FILE) --parents $(SOURCES) $(HEADERS) \ 
       $(FORMS) $(DIST) .tmp/qapp/ \ 
    &&  (cd `dirname .tmp/qapp` \ && $(TAR) qapp.tar qapp \ 
         && $(COMPRESS) qapp.tar) \ 
    && $(MOVE) `dirname .tmp/qapp`/qapp.tar.gz . \ 
    && $(DEL_FILE) -r .tmp/qapp

clean:compiler_clean                # yet another target
	-$(DEL_FILE) $(OBJECTS)
	-$(DEL_FILE) *~ core *.core


####### Dependencies for implicit rules

main.o: main.cpp