GREP = @GREP@
MOC  = @MOC@
CXX  = @CXX@
FLEX = @FLEX@
BISON = @BISON@
INSTALL = @INSTALL@

TOPDIR = @top_srcdir@
PROGRAM = @PROGRAM@
VERSION = @VERSION@
PROGRAM_PATH = $(TOPDIR)/bin/$(PROGRAM)
#
# allow user specified install path prefix
#
EXEC_PREFIX = @exec_prefix@
ifeq ($(EXEC_PREFIX),)
	EXEC_PREFIX=/usr/local/bin
endif

CXXFLAGS = @CXXFLAGS@
INCLUDE_DIRS = @QT_INC_DIR@
IFLAGS = $(addprefix -I,$(INCLUDE_DIRS))
LIBRARIES = QtCore Xext X11 m
LIB_DIRS  = @QT_LIB_DIR@ /usr/X11R6/lib
LFLAGS = $(addprefix -L,$(LIB_DIRS)) $(addprefix -l,$(LIBRARIES))

CPP_SRC = $(wildcard *.cpp) expr.ll.cpp expr.yy.cpp
HPP_SRC = $(wildcard *.hpp)
H_SRC   = $(wildcard *.h) $(HPP_SRC)
MOC_HPP = $(shell $(GREP) -l Q_OBJECT $(HPP_SRC))

MOC_SRC  = $(addprefix moc_,$(MOC_HPP:.hpp=.cpp))
CXX_SRC  = $(CPP_SRC) $(MOC_SRC)

OBJECTS = $(sort $(CXX_SRC:.cpp=.o))

BUILD_DATE = $(shell @DATE_PROG@)
BUILD_HOST = $(shell @HOSTNAME_PROG@)

ifeq ($(VERBOSE),)
	QUIET = @
else
	QUIET =
endif

.PHONY : clean_moc clean_objects clean moc all build_info.h

#
# rules
#
all : $(PROGRAM_PATH)

$(PROGRAM_PATH) : $(OBJECTS)
	@echo "Linking $(PROGRAM_PATH)"
	$(QUIET) $(CXX) $(OBJECTS) $(LFLAGS) -o $@

app.pro :
	echo "TEMPLATE = app" > $@
	echo "SOURCES  = $(CPP_SRC)" >> $@
	echo "HEADERS  = $(H_SRC)" >> $@
	echo "TARGET   = $(PROGRAM)" >> $@
	echo "CONFIG   = qt warn_on debug" >> $@

build_info.h :
	echo #define BUILD_HOST "$(BUILD_HOST)" > $@
	echo #define BIULD_DATE "$(BUILD_DATE)" >> $@

moc : $(MOC_SRC)

clean : clean_moc clean_objects
	@echo "Removing objects and derived sources..."
	$(QUIET) $(RM) core *~ .depend img/*~

clean_moc :
	$(QUIET) $(RM) $(MOC_SRC)

clean_objects :
	$(QUIET) $(RM) $(OBJECTS) $(PROGRAM_PATH)

depend : $(CXX_SRC)
	@echo "Generating .depend file..."
	$(QUIET) $(CXX) $(CXXFLAGS) $(IFLAGS) $^ -M -MG > .depend

objects : $(OBJECTS)

install :
	@echo "Installing $(PROGRAM) in $(EXEC_PREFIX)"
	$(QUIET) $(INSTALL) $(PROGRAM_PATH) $(EXEC_PREFIX)

# pattern rules
moc_%.cpp : %.hpp
	@echo "Generating $@..."
	$(QUIET) $(MOC) $< -o $@

%.o : %.cpp
	@echo "Compiling $<..."
	$(QUIET) $(CXX) $(CXXFLAGS) $(IFLAGS) -c $< -o $@

# rules for flex/bison
expr.ll.cpp : expr.l expr.yy.hh
	$(FLEX) -o$@ -Pexpr expr.l
expr.yy.cpp expr.yy.hh : expr.y
	$(BISON) -d -b expr -p expr -o expr.yy.cpp $^

#
# Include make dependancies if they have been generated
#
-include .depend