# This makefile generates 4 Ruby extensions - one each for
# gdal, ogr, osr, and gdalconstants.  There are two important
# things to note:
#
# * It makes multiple calls to Ruby to discover the Ruby version,
#	location of header files, libraries, etc.  Thus Ruby must
#	be on your path.
#
# * By convention Ruby method names are lower case with underscores,
#	thus methods such as "GetFieldName" need to be mapped to
#	"get_field_name."  The makefile automatically does this by:
#	
#	1. Calls the RenameMakefile which blanks out the renames.i 
#	   SWIG file.  It then runs SWIG to generate wrapper files.
#	   Then it runs a Ruby script to translate methods names, 
#	   writes %rename directives to renames.i, and then deletes
#	   the wrapper files.
#	2. This makefile then generates the wrappers and builds
#	   the Ruby extensions as shared libraries.


GDAL_ROOT = ../..
RUBY = ruby

include ../../GDALmake.opt

BINDING = ruby
include ../SWIGmake.base

RUBY_MODULES = gdal/gdal.so gdal/ogr.so gdal/gdalconst.so gdal/osr.so

RUBY_MAJOR_VERSION := $(shell ruby -rrbconfig -e "puts Config::CONFIG['MAJOR']")
RUBY_MINOR_VERSION := $(shell ruby -rrbconfig -e "puts Config::CONFIG['MINOR']")
RUBY_VERSION := $(RUBY_MAJOR_VERSION).$(RUBY_MINOR_VERSION)
RUBY_SO_NAME := $(shell ruby -rrbconfig -e "puts Config::CONFIG['RUBY_SO_NAME']")

RUBY_DIR := $(shell ruby -rrbconfig -e "puts Config::TOPDIR")
RUBY_ARCH := $(shell ruby -rrbconfig -e "puts Config::CONFIG['arch']")
RUBY_ARCH_DIR := $(RUBY_DIR)/lib/ruby/$(RUBY_VERSION)/$(RUBY_ARCH)

GDAL_INCLUDE := -I../../port -I../../gcore -I../../alg -I../../ogr
RUBY_INCLUDE := -I$(RUBY_ARCH_DIR)

GDAL_LIB := -L$(GDAL_ROOT) -lgdal 
RUBY_LIB := -shared -L$(RUBY_DIR)/lib -l$(RUBY_SO_NAME)

renames:
	$(MAKE) -f RenameMakefile.mk all

build: $(RUBY_MODULES)

$(RUBY_ARCH_DIR):
	mkdir $(RUBY_ARCH_DIR)/gdal

install: $(RUBY_ARCH_DIR)
	cp gdal/* $(RUBY_ARCH_DIR)/gdal

$(RUBY_MODULES): gdal/%.so: %_wrap.o
	$(LD) $(LDFLAGS) $(LIBS) $(GDAL_LIB) $(RUBY_LIB) $< -o $@

%.o: %.cpp
	$(CXX) $(CFLAGS) $(GDAL_INCLUDE) $(RUBY_INCLUDE)  -c $<

%.o: %.cxx
	$(CXX) $(CFLAGS) $(GDAL_INCLUDE) $(RUBY_INCLUDE) -c $<

%.o: %.c
	$(CC) $(CFLAGS) $(GDAL_INCLUDE)  $(RUBY_INCLUDE) -c $<