PKGS = array avl graph heap list sparse st util var_set

MAKEINCLUDES = \
	$(foreach package, $(PKGS), \
                $(package)/$(package).make )
                                                                                
include $(MAKEINCLUDES)

INCLUDEDIRS = $(foreach package, $(PKGS), -I./$(package))

#----------------------------------------------------------------------
# The value of the make variable VPATH specifies a list of directories 
# that make should search. 
# http://www.gnu.org/software/make/manual/make.html#General-Search
#----------------------------------------------------------------------
VPATH = $(foreach package, $(PKGS), $(package))

#----------------------------------------------------------------------
# The directory where the object files (.o files) will be kept
#----------------------------------------------------------------------
objectdir = obj

#----------------------------------------------------------------------
# Define the set of all object files. 
#
# For details on the addprefix function refer to 
# http://www.gnu.org/software/make/manual/make.html#File-Name-Functions
# 
# For details on the substitution $(CSRC:.c=.o) refer to
# http://www.gnu.org/software/make/manual/make.html#Substitution-Refs
#
#----------------------------------------------------------------------
OBJECTS = $(addprefix $(objectdir)/,$(CSRC:.c=.o))

#----------------------------------------------------------------------
# The name of the product and its version
#----------------------------------------------------------------------
PRODUCT = glu
VERSION = 2.1

#----------------------------------------------------------------------
# Name of the library to create
#----------------------------------------------------------------------
LIBRARY =       lib$(PRODUCT)-$(VERSION).a

#----------------------------------------------------------------------
# Compiler/lib creation/archiver tools
#----------------------------------------------------------------------
CC =            gcc
RANLIB =        ranlib
AR =            /usr/bin/ar

#----------------------------------------------------------------------
# C compiler flags
#----------------------------------------------------------------------
CFLAGS =        -g $(INCLUDEDIRS)

#----------------------------------------------------------------------
# For compiling a source file into the object directory
#
# The % sign below is a wildcard. For details on this construct see
# http://www.gnu.org/software/make/manual/make.html#Pattern-Rules
#
# The command uses the automatic variables `$@' and `$<' to substitute
# the names of the target file and the source file in each case
# where the rule applied.  For details see
# http://www.gnu.org/software/make/manual/make.html#Pattern-Rules
#
#----------------------------------------------------------------------
$(objectdir)/%.o : %.c
	$(CC) -c $(CFLAGS) -o $@  $<
                                                                                
#----------------------------------------------------------------------
# Create a library (which is just a set of object files, created by ar, 
# and an index into the functions in these files, created by ranlib
#
# The $^ variable is all the pre-requisites.  For details see
# http://www.gnu.org/software/make/manual/make.html#Automatic-Variables
#----------------------------------------------------------------------
%.a :
	rm -f $@
	umask 2; $(AR) cq $@ $^
	$(RANLIB) $@

#----------------------------------------------------------------------
# The library we are trying to create depends on the object files.
# We don't need to specify the build process because that's specified 
# automatically above.
#----------------------------------------------------------------------
$(LIBRARY) : $(OBJECTS)

#----------------------------------------------------------------------
# clean - remove all object files, libraries
#----------------------------------------------------------------------
clean:
	rm $(OBJECTS) *.a 


#----------------------------------------------------------------------
# debug - Print a list of Makefile variables, useful for 
# debugging the make process
#----------------------------------------------------------------------

DEBUG_VARS =   CSRC HEADERS objectdir CC CFLAGS RANLIB AR \
		PRODUCT LIBRARY OBJECTS MAKEINCLUDES VPATH
                                                                                 
debug:
	@$(foreach var, $(DEBUG_VARS), echo $(var)=$($(var)) ; )