#    GMPAda, binding to the Ada Language for the GNU MultiPrecision library.
#    Copyright (C) 2007-2012 Nicolas Boulenguez <nicolas.boulenguez@free.fr>
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    This program 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 for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.

########################
# Global configuration #
########################

LIB_NAME := gmpada

SOVERSION := 2

################################
# Build and test configuration #
################################

# Use environment variables if available, this is common practice for
# CFLAGS and LDFLAGS.
CFLAGS   ?= -O2
ADAFLAGS ?= -O2
LDFLAGS  ?=

.NOTPARALLEL:
GPRBUILD_OPTIONS := -j$(shell getconf _NPROCESSORS_ONLN)

ifdef ALL_CHECKS
  CFLAGS += -Wall -Wextra -Wformat -Wformat-security -g
  ADAFLAGS += -Wall -Wextra -g -gnatE -gnatQ -gnatVa -gnata -gnatf	\
  -gnato -gnatq -gnatySdouxy
  GPRBUILD_OPTIONS += -s -we
endif

# We want the same compiler for generate_constants.c and the library.
CC := gnatgcc

##############################
# Installation configuration #
##############################

# Each of the following path should be prefixed with
DESTDIR :=

# The sources files are installed into a LIB_NAME subdirectory of
SRC_DIR := usr/share/ada/adainclude

# A LIB_NAME.gpr project convenient for library usage is installed into
GPR_DIR := usr/share/ada/adainclude
# The content of this file ignores DESTDIR.

# The GNAT ALI files are installed into a LIB_NAME subdirectory of
ALI_DIR := usr/lib/ada/adalib

# The static and dynamic library are installed into
LIB_DIR := usr/lib

#########
# Rules #
#########

# Function exporting a variable on the command line.
to_X_options = $(foreach var,$(1),-X$(var)="$($(var))")

build: build-dynamic build-static

build-dynamic build-static: build-%: src/gmp-constants.ads
	gprbuild $(LIB_NAME).gpr $(GPRBUILD_OPTIONS) -XKIND=$* $(call to_X_options,\
          ADAFLAGS CFLAGS LDFLAGS SOVERSION)

clean::
	rm -f $(foreach dir,obj lib,$(foreach kind,dynamic static,build-$(dir)-$(kind)/*))

src/gmp-constants.ads: generate_constants
	./$< > $@
clean::
	rm -f src/gmp-constants.ads

generate_constants: LDLIBS := -lgmp
clean::
	rm -f generate_constants

clean::
	find -name "*~" -delete

test: build-static
	gprbuild demo/demo.gpr $(GPRBUILD_OPTIONS) -XKIND=static $(call to_X_options,\
          ADAFLAGS CFLAGS LDFLAGS)
	demo/demo
# Gmpada.gpr is found in the current directory when executing this
# recipe, and will be found in the default system location after
# installation.
clean::
	gprclean -q demo/demo.gpr -XKIND=static

install: build
	install --directory $(DESTDIR)/$(SRC_DIR)/$(LIB_NAME)
	install --mode=644 src/*.ad[sb] src/*.[ch] $(DESTDIR)/$(SRC_DIR)/$(LIB_NAME)
	install --directory $(DESTDIR)/$(GPR_DIR)
	sed template_for_installed_project \
          $(foreach var,LIB_NAME SRC_DIR ALI_DIR LIB_DIR,-e 's|$$($(var))|$($(var))|g') \
          > $(DESTDIR)/$(GPR_DIR)/$(LIB_NAME).gpr
	chmod 644 $(DESTDIR)/$(GPR_DIR)/$(LIB_NAME).gpr
	install --directory $(DESTDIR)/$(ALI_DIR)/$(LIB_NAME)
	install --mode=444 build-lib-dynamic/*.ali $(DESTDIR)/$(ALI_DIR)/$(LIB_NAME)
	install --directory $(DESTDIR)/$(LIB_DIR)
	install --mode=644 build-lib-static/lib$(LIB_NAME).a $(DESTDIR)/$(LIB_DIR)
	install --mode=644 build-lib-dynamic/lib$(LIB_NAME).so.$(SOVERSION) $(DESTDIR)/$(LIB_DIR)
	cd $(DESTDIR)/$(LIB_DIR) && ln --force --symbolic lib$(LIB_NAME).so.$(SOVERSION) lib$(LIB_NAME).so

uninstall:
	rm -rf $(DESTDIR)/$(SRC_DIR)/$(LIB_NAME)
	rm -f $(DESTDIR)/$(GPR_DIR)/$(LIB_NAME).gpr
	rm -rf $(DESTDIR)/$(ALI_DIR)/$(LIB_NAME)
	rm -f $(DESTDIR)/$(LIB_DIR)/lib$(LIB_NAME).a
	rm -f $(DESTDIR)/$(LIB_DIR)/lib$(LIB_NAME).so.$(SOVERSION)
	rm -f $(DESTDIR)/$(LIB_DIR)/lib$(LIB_NAME).so

.PHONY: build build-dynamic build-static clean install test uninstall
