#########################################################################
#
#                          Intelligent Makefile
#
#                     Copyright (C) 1998 Markus Mottl
#
#########################################################################

# Note: you may also call this makefile with the appropriate variables
# e.g.: "make CXXFLAGS=-g"

# Place the names of your sources to link and of the binary here
SOURCES        = reent.cc reent.l reent.y
BINARY         = reent

# Add a list of trash files that should be deleted if necessary
TRASH          =

# Eventually set include- and library-paths and the libraries to link
INCDIRS        =
LIBDIRS        =
LIBS           =
LDFLAGS        =

#########################################################################

SHELL          = /bin/sh

# -Wsign-compare and -Wuninitialized (in -Wall) turned off because of problems
# with some libraries! (STL)
# Turn these warnings temporarily on if you want to check *your* code!
WARN           = -Wall
# some programs (lex/yacc) may produce code that has unused variables...
NOWARNAUTO     =

CXX            = g++
CXXFLAGS       =
INCFLAGS       = $(patsubst %,-I%, $(INCDIRS)) 
ALL_CXXFLAGS   = $(WARN) $(CXXFLAGS) $(INCFLAGS)

LD             = $(CXX)
ALL_LDFLAGS    = $(LDFLAGS) $(patsubst %,-L%, $(LIBDIRS)) $(patsubst %,-l%, $(LIBS)) 

LEX            = flex
LFLAGS         = -+

YACC           = bison
YFLAGS         = -d

FILTERED       = $(filter %.cc %.c %.l %.y, $(SOURCES))

OBJECTS_3     := $(FILTERED:.l=.l.o)
OBJECTS_2     := $(OBJECTS_3:.y=.tab.o)
OBJECTS_1     := $(OBJECTS_2:.cc=.o)
OBJECTS       := $(OBJECTS_1:.c=.o)

DEP_SOURCES_3 := $(filter %.y %.l, $(FILTERED))
DEP_SOURCES_2 := $(DEP_SOURCES_3:.l=.l.C)
DEP_SOURCES_1 := $(DEP_SOURCES_2:.y=.tab.C)
DEP_SOURCES   := $(DEP_SOURCES_1) $(patsubst %.y,%.tab.h, $(filter %.y, $(FILTERED)))

MAKEDEPS_3    := $(FILTERED:.l=.l.d)
MAKEDEPS_2    := $(MAKEDEPS_3:.y=.tab.d)
MAKEDEPS_1    := $(MAKEDEPS_2:.cc=.d)
MAKEDEPS      := $(MAKEDEPS_1:.c=.d)

TARGETS       := $(strip $(BINARY) $(OBJECTS) $(DEP_SOURCES) $(MAKEDEPS))

#########################################################################
# GENERAL RULES

all:			$(BINARY)

%.o:			%.cc
			$(CXX) -c $(ALL_CXXFLAGS) $<

%.o:			%.C
			$(CXX) -c $(ALL_CXXFLAGS) $(NOWARNAUTO) $<

.PRECIOUS:		%.l.C
%.l.C:			%.l
			$(LEX) $(LFLAGS) -o$@ $<

.PRECIOUS:		%.tab.C
%.tab.C %.tab.h:	%.y
			$(YACC) $(YFLAGS) -b $* $<
			@mv $*.tab.c $*.tab.C

%.d:			%.cc
			@echo making $@ from $<
			@rm -f $@
			@$(CXX) -M -MG $(ALL_CXXFLAGS) $< | \
			  sed -e 's/$*\.o/& $@/g' > $@.tmp
			@mv $@.tmp $@

%.d:			%.C
			@echo making $@ from $<
			@rm -f $@
			@$(CXX) -M -MG $(ALL_CXXFLAGS) $< | \
			  sed -e 's/$*\.o/& $@/g' > $@.tmp
			@mv $@.tmp $@

$(BINARY):		$(OBJECTS)
			$(LD) -o $(BINARY) $(OBJECTS) $(ALL_LDFLAGS) 

#########################################################################
# MAINTAINANCE RULES

.PHONY:	clean
clean:
	rm -f core $(TARGETS) $(TRASH)

#########################################################################

ifndef omit_deps
-include $(MAKEDEPS)
endif