## Copyright 2015-2022 Ian Jauslin
## 
## Licensed under the Apache License, Version 2.0 (the "License");
## you may not use this file except in compliance with the License.
## You may obtain a copy of the License at
## 
##     http://www.apache.org/licenses/LICENSE-2.0
## 
## Unless required by applicable law or agreed to in writing, software
## distributed under the License is distributed on an "AS IS" BASIS,
## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
## See the License for the specific language governing permissions and
## limitations under the License.

# whether to link dynamically
#   if static=0 then link dynamically
#   if static=2 then link statically
#   if static=1 then link libkondo statically but other libraries dynamically
STATIC=1

VERSION=1.4

# products of the compilation
PROJECT_BINS= meankondo numkondo meantools kondo_preprocess meantools-convert
PROJECT_SO=libkondo.so.$(VERSION)
PROJECT_LIBS=libkondo.a
PROJECT_MANS=meankondo.1 numkondo.1 meantools.1 meantools-convert.1 kondo_preprocess.1
PROJECT_SCRIPTS=config_functions.sh
PROJECT_DOCS=meankondo-doc.html

# debug and optimization flags
#DB= -ggdb
OPT= -O3

# warning flags
WARNINGS= -Wall -Wextra -Wno-strict-overflow -std=c99 -pedantic

# installation dirs
PREFIX=/usr
BINDIR=$(PREFIX)/bin
LIBDIR=$(PREFIX)/lib
MANDIR=$(PREFIX)/share/man/man1
SCRIPTDIR=$(PREFIX)/share/meankondo/scripts
DOCDIR=$(PREFIX)/share/doc/meankondo-doc

# compiler
CC=/usr/bin/gcc
LD=$(CC)
AR=/usr/bin/ar

# directories
INCLUDE = 
LIB = 

# flags
override LDFLAGS +=$(LIB)
override CFLAGS +=$(INCLUDE)$(DB) $(OPT) $(WARNINGS)

# build directories
BUILDDIR=./build
SRCDIR=./src
OBJDIR=./objs

# objects
LIBKONDO_OBJS = $(addprefix $(OBJDIR)/,array.o cli_parser.o coefficient.o fields.o grouped_polynomial.o idtable.o istring.o number.o parse_file.o polynomial.o rational_float.o rational_int.o rcc.o rcc_mpfr.o symbolic_parser.o tree.o tools.o)
MEANKONDO_OBJS = $(addprefix $(OBJDIR)/,meankondo.o determinant.o mean.o)
NUMKONDO_OBJS = $(addprefix $(OBJDIR)/,numkondo.o flow.o flow_mpfr.o)
MEANTOOLS_OBJS = $(addprefix $(OBJDIR)/,meantools.o meantools_deriv.o meantools_eval.o meantools_expand.o)
KONDO_PP_OBJS = $(addprefix $(OBJDIR)/,kondo_preprocess.o kondo.o)


# flags which depend on whether to link statically or dynamically
# lib flag for libkondo
LIBKONDO_FLAG=-lkondo
# additional library required for static linking
XTRA_LIBS=

ifeq ($(STATIC),1)
  # compile libkondo.a
  PREREQ=static
  # libkondo is linked against libm, libmpfr and libgmp
  XTRA_LIBS=-lm -lmpfr -lgmp
  # link binaries using the static library
  LIBKONDO_FLAG=-l:libkondo.a
  # install static lib
  INSTALLLIB=install-static
else ifeq ($(STATIC),2)
  # compile libkondo.a
  PREREQ=static
  # libkondo is linked against libm, libmpfr and libgmp
  XTRA_LIBS=-lm -lmpfr -lgmp
  # link binaries statically
  override LDFLAGS += -static
  INSTALLLIB=install-static
else
  # compile libkondo.so.$(VERSION)
  PREREQ=shared
  # required flag for subsequent dynamic linking
  override CFLAGS += -fPIC
  INSTALLLIB=install-shared
endif


all:	init $(PREREQ)

# create dirs
init:
	@[ -d $(OBJDIR) ] || /bin/mkdir $(OBJDIR)
	@[ -d $(BUILDDIR) ] || /bin/mkdir $(BUILDDIR)
	@[ -d $(BUILDDIR)/bin ] || /bin/mkdir $(BUILDDIR)/bin
	@[ -d $(BUILDDIR)/lib ] || /bin/mkdir $(BUILDDIR)/lib

# static library
static: $(PROJECT_LIBS) $(PROJECT_BINS)
# shared library
shared: $(PROJECT_SO) $(PROJECT_BINS)

libkondo.a: $(LIBKONDO_OBJS)
	$(AR) -rc $(BUILDDIR)/lib/$@ $^

libkondo.so.$(VERSION): $(LIBKONDO_OBJS)
	$(LD) -shared -lm -lmpfr -lgmp $(LDFLAGS) -o $(BUILDDIR)/lib/$@ $^
	ln -fs ./libkondo.so.$(VERSION) $(BUILDDIR)/lib/libkondo.so

meankondo: $(MEANKONDO_OBJS)
	$(LD) -L$(BUILDDIR)/lib $(LDFLAGS) -o $(BUILDDIR)/bin/$@ $^ $(LIBKONDO_FLAG) -lpthread $(XTRA_LIBS)

numkondo: $(NUMKONDO_OBJS)
	$(LD) -L$(BUILDDIR)/lib $(LDFLAGS) -o $(BUILDDIR)/bin/$@ $^ $(LIBKONDO_FLAG) -lm -lmpfr -lgmp $(XTRA_LIBS)

meantools: $(MEANTOOLS_OBJS)
	$(LD) -L$(BUILDDIR)/lib $(LDFLAGS) -o $(BUILDDIR)/bin/$@ $^ $(LIBKONDO_FLAG) -lmpfr -lgmp $(XTRA_LIBS)

meantools-convert:
	cp scripts/meantools-convert $(BUILDDIR)/bin/

kondo_preprocess: $(KONDO_PP_OBJS)
	$(LD) -L$(BUILDDIR)/lib $(LDFLAGS) -o $(BUILDDIR)/bin/$@ $^ $(LIBKONDO_FLAG) $(XTRA_LIBS)

%.o :	../$(SRCDIR)/%.c
	$(CC) -c $(CFLAGS) $< -o $@

install: $(INSTALLLIB) all
	mkdir -p $(BINDIR) $(MANDIR) $(SCRIPTDIR) $(DOCDIR)
	install -Dm755 $(addprefix $(BUILDDIR)/bin/,$(PROJECT_BINS)) $(BINDIR)/
	install -Dm644 $(addprefix man/,$(PROJECT_MANS)) $(MANDIR)/
	gzip $(addprefix $(MANDIR)/,$(PROJECT_MANS))
	install -Dm644 $(addprefix scripts/,$(PROJECT_SCRIPTS)) $(SCRIPTDIR)/
	install -Dm644 $(addprefix doc/,$(PROJECT_DOCS)) $(DOCDIR)/

install-static: all
	mkdir -p $(LIBDIR)
	install -Dm755 $(addprefix $(BUILDDIR)/lib/,$(PROJECT_LIBS)) $(LIBDIR)/
install-shared: all
	mkdir -p $(LIBDIR)
	install -Dm755 $(addprefix $(BUILDDIR)/lib/,$(PROJECT_SO)) $(LIBDIR)/
	for lib in $(PROJECT_SO); do ln -fs ./$$lib $(LIBDIR)/$${lib%.so.*}.so; done

clean:
	@rm -rf $(OBJDIR)
	@rm -rf $(BUILDDIR)