#
# Copyright (c) 2014, 2023, Oracle and/or its affiliates. All rights reserved.
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
#
# This code is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 3 only, as
# published by the Free Software Foundation.
#
# This code is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
# version 3 for more details (a copy is included in the LICENSE file that
# accompanied this code).
#
# You should have received a copy of the GNU General Public License version
# 3 along with this work; if not, write to the Free Software Foundation,
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
# or visit www.oracle.com if you need additional information or have any
# questions.
#

.PHONY: all clean

$(info Building FastR with LLVM... CC is $(LABS_LLVM_CC))
$(info LLVM_RUNTIME_LIBS is $(LLVM_RUNTIME_LIBS))
$(info LLVM_INCLUDES is $(LLVM_INCLUDES))
$(info NFI_INCLUDES is $(NFI_INCLUDES))

export TOPDIR = $(CURDIR)
export FASTR_R_HOME=$(abspath $(TOPDIR)/..)
export FASTR_LIB_DIR=$(FASTR_R_HOME)/lib
export FASTR_NATIVE_DIR = $(TOPDIR)
export R_VERSION = 4.0.3
export R_VERSION_MAJ_MIN = 4.0
export DEFAULT_CRAN_MIRROR = "https://packagemanager.posit.co/cran/2021-02-01"
export GNUR_HOME = $(TOPDIR)/gnur/patch-build
export F2C_HOME= $(FASTR_R_HOME)/f2c

$(info R_VERSION: $(R_VERSION))
$(info GRAALVM_VERSION: $(GRAALVM_VERSION))
$(info GNUR_HOME: $(GNUR_HOME))
$(info DEFAULT_CRAN_MIRROR: $(DEFAULT_CRAN_MIRROR))
	
# TODO: can be removed?
ifndef FASTR_RFFI
export FASTR_RFFI = nfi
endif

ifndef GNUR_HOME_BINARY
export GNUR_HOME_BINARY = $(FASTR_R_HOME)/libdownloads/R-$(R_VERSION)
export BUILD_GNUR = "true"
$(info GNUR_HOME_BINARY not set. Assuming the default location at $(GNUR_HOME_BINARY))
else
unexport BUILD_GNUR
$(info Using cached build of GNU-R from $(GNUR_HOME_BINARY))
endif
export GNUR_HOME_BINARY_UNPACKED = $(FASTR_R_HOME)/libdownloads/R-$(R_VERSION)
$(info GNUR_HOME_BINARY_UNPACKED: $(GNUR_HOME_BINARY_UNPACKED))

# Completely accurate dependency analysis is very difficult for this project, so use a version number
# to force a clean build, and elsewhere use sentinels to avoid rebuilding when we can't compute the
# dependencies accurately.


OS_NAME := $(shell uname -s)

all: checkversion
	$(MAKE) -C f2c
	$(MAKE) -C gnur
	$(MAKE) -C include
	$(MAKE) -C fficall
	$(MAKE) -C $(GNUR_HOME)/src/library
	$(MAKE) -C run
	cp version.source version.built
	
clean:
	#$(MAKE) -C f2c clean
	$(MAKE) -C include clean
	$(MAKE) -C fficall clean
	$(MAKE) -C run clean
	$(MAKE) -C gnur clean


version.source := $(shell cat version.source)

#$(info version: $(version.source))
ifeq ($(wildcard version.built),)
	doclean = 1
else
version.built := $(shell cat version.built)
#$(info version.built: $(version.built))
ifneq ($(version.source),$(version.built))
	doclean = 1
else
	doclean = 0
endif
endif

$(info doclean: $(doclean))
checkversion:
ifeq ($(doclean),1)
	$(MAKE) clean
endif