# Copyright (c) 2023 TK Chia
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

DESTDIR =
abs_srcdir = @abs_srcdir@
srcdir = @srcdir@
objdir = .
VPATH = $(srcdir)
mkinstalldirs = $(SHELL) $(srcdir)/mkinstalldirs

prefix = @prefix@
exec_prefix = @exec_prefix@

bindir = @bindir@
includedir = @includedir@
libdir = @libdir@
build3dir = 3rd-party.build

INSTALL = @INSTALL@
INSTALL_PROGRAM = @INSTALL_PROGRAM@
INSTALL_DATA = @INSTALL_DATA@
AWK = @AWK@

CC = @CC@
CPPFLAGS = @CPPFLAGS@ -I$(srcdir)/h -I$(objdir)/h
CFLAGS = @CFLAGS@
LDFLAGS = @LDFLAGS@
LIBS = @LIBS@
OBJEXT = @OBJEXT@
EXEEXT = @EXEEXT@
AR = @AR@
RANLIB = @RANLIB@
OBJCOPY = @OBJCOPY@
UPX = @UPX@

WINCC = @WINCC@
WINCXX = @WINCXX@
HOSTRUN = @HOSTRUN@

lfanew_cv_prog_wincc_ldscripts_i386pe_x \
= @lfanew_cv_prog_wincc_ldscripts_i386pe_x@
lfanew_cv_prog_wincc_ldscripts_i386pep_x \
= @lfanew_cv_prog_wincc_ldscripts_i386pep_x@

PROGRAMS = $(LFANEW)
LIBRARIES = a/libfanew.a
HEADERS = h/lfanew/dirent.h \
	  h/lfanew/io.h \
	  h/lfanew/_config.h \
	  h/lfanew/_version.h \
	  h/nexgen/mzendian.h \
	  h/nexgen/mzhdr.h
LIBOBJS = a/direntdup.$(OBJEXT)
SCRIPTS =
ifeq "no" "@ac_cv_func_scandir@"
  LIBOBJS += a/scandir.$(OBJEXT)
endif
ifneq "none" "$(lfanew_cv_prog_wincc_ldscripts_i386pe_x)"
  SCRIPTS += ldscripts/i386pebc.x
endif
ifneq "none" "$(lfanew_cv_prog_wincc_ldscripts_i386pep_x)"
  SCRIPTS += ldscripts/i386pepbc.x
endif
DATA = $(build3dir)/msdos_i486.pe

LFANEW = lfanew$(EXEEXT)

default: $(PROGRAMS) $(HEADERS) $(LIBRARIES) $(SCRIPTS) $(DATA)
.PHONY: default

all: default
.PHONY: all

install: $(PROGRAMS) $(HEADERS) $(LIBRARIES)
	$(mkinstalldirs) $(DESTDIR)$(bindir) $(DESTDIR)$(libdir) \
	  $(sort $(dir $(HEADERS:h/%=$(DESTDIR)$(includedir)/%)))
	$(INSTALL_PROGRAM) $(filter-out %.h %.a,$^) $(DESTDIR)$(bindir)
	set -e; \
	for h in $(HEADERS:h/%=%); do \
	  if test -f h/"$$h"; then \
	    $(INSTALL_DATA) h/"$$h" $(DESTDIR)$(includedir)/"$$h"; \
	  else \
	    $(INSTALL_DATA) $(srcdir)/h/"$$h" $(DESTDIR)$(includedir)/"$$h"; \
	  fi; \
	done
	for a in $(LIBRARIES:a/%=%); do \
	  if test -f a/"$$a"; then \
	    $(INSTALL_DATA) a/"$$a" $(DESTDIR)$(libdir)/"$$a"; \
	  else \
	    $(INSTALL_DATA) $(srcdir)/a/"$$a" $(DESTDIR)$(libdir)/"$$a"; \
	  fi; \
	done
.PHONY: install

clean mostlyclean:
	$(RM) *.[oa] $(PROGRAMS) $(SCRIPTS) $(OBJS) $(LIBRARIES) \
	      $(build3dir) *~
.PHONY: clean mostlyclean

distclean maintainer-clean: clean
	$(RM) Makefile config.cache config.log config.status h/lfanew/_*.h
.PHONY: distclean maintainer-clean

check check-local: tests/testsuite
	exec $< -C tests $(TESTSUITEFLAGS)
.PHONY: check check-local

installcheck installcheck-local: tests/testsuite
	exec $< --x-installcheck -C tests $(TESTSUITEFLAGS)
.PHONY: installcheck installcheck-local

helpcheck: tests/testsuite
	exec $< -C tests --help $(TESTSUITEFLAGS)
.PHONY: helpcheck

listcheck: tests/testsuite
	exec $< -C tests --list $(TESTSUITEFLAGS)
.PHONY: listcheck

lfanew$(EXEEXT): lfanew.$(OBJEXT)

%.$(OBJEXT): %.c $(HEADERS)
	mkdir -p $(@D)
	$(CC) $(CPPFLAGS) $(CFLAGS) $(TARGET_ARCH) -c $< -o $@

# NOTE: $(LIBRARIES) is for any library files built in this project, while
# $(LDLIBS) & $(LIBS) are for pre-existing system libraries.  GNU autoconf &
# automake apparently use the names $(LIBRARIES) & $(LIBS) the same ways.
%$(EXEEXT): %.$(OBJEXT) $(LIBRARIES)
	$(CC) $(LDFLAGS) $(TARGET_ARCH) $^ $(LOADLIBES) $(LDLIBS) $(LIBS) -o $@

a/libfanew.a: $(LIBOBJS)
	$(RM) $@
	$(AR) cq $@ $^
	$(RANLIB) $@

# Cancel GNU make's built-in implicit rules.
%.$(OBJEXT): %.c
%$(EXEEXT): %.$(OBJEXT)

ldscripts/i386pebc.x: patch-lds.awk $(lfanew_cv_prog_wincc_ldscripts_i386pe_x)
	mkdir -p $(@D)
	$(AWK) -f $< $(lfanew_cv_prog_wincc_ldscripts_i386pe_x) >$@.tmp
	mv $@.tmp $@

ldscripts/i386pepbc.x: patch-lds.awk \
		       $(lfanew_cv_prog_wincc_ldscripts_i386pep_x)
	mkdir -p $(@D)
	$(AWK) -f $< $(lfanew_cv_prog_wincc_ldscripts_i386pep_x) >$@.tmp
	mv $@.tmp $@

$(build3dir)/msdos_i486.pe: $(build3dir)/msdos_i486.exe $(LFANEW)
	$(HOSTRUN) '$(abspath $(LFANEW))' -U -o $@ $<

$(build3dir)/msdos_i486.exe: 3rd-party/msdos.7z msdos.baseofcode.patch \
			     $(build3dir)/msdos-opts.bin $(SCRIPTS)
	mkdir -p $(@D)
	$(RM) -r $(@D)/msdos
	7z x -o$(@D) $<
	dos2unix $(@D)/msdos/source/*.*
	LC_ALL=C patch -d$(@D)/msdos -p1 <$(filter %.patch,$^)
	$(MAKE) -C $(@D)/msdos/source -f Makefile.mingw \
		CC='$(WINCC)' CXX='$(WINCXX)' LDFLAGS_EXTRA='$(LDFLAGS_EXTRA)'\
		i486
ifeq "/bin/false" "$(UPX)"
	cp $(@D)/msdos/binary/msdos_i486.exe $@.tmp
else
	$(OBJCOPY) -R .slack $(@D)/msdos/binary/msdos_i486.exe $@.tmp
	$(UPX) -9 $@.tmp
endif
	$(OBJCOPY) --add-section .msdos=$(filter %.bin,$^) $@.tmp
	mv $@.tmp $@

$(build3dir)/msdos_i486.exe \
 : LDFLAGS_EXTRA = -T$(abspath $(SCRIPTS)) \
		   -Wl,--defsym=__base_of_code__=0x80000

$(build3dir)/msdos-opts.bin:
	mkdir -p $(@D)
	dd if=/dev/zero of=$@.tmp bs=17 count=1
	mv $@.tmp $@

# Copy the generated tests/testsuite from the source directory to the build
# directory, or create a symlink from the latter to the former --- but only
# if the two directories are different.
tests/testsuite: $(abs_srcdir)/tests/testsuite
	set -e; \
	if test \! $@ -ef $<; then \
	  $(RM) $@.tmp; \
	  ln -s $< $@.tmp || cp $< $@.tmp; \
	  mv $@.tmp $@; \
	fi
.PRECIOUS: tests/testsuite

$(abs_srcdir)/tests/testsuite: $(abs_srcdir)/tests/testsuite.at \
			       $(wildcard $(abs_srcdir)/tests/*.at \
					  $(abs_srcdir)/tests/*.in)
	cd $(abs_srcdir)/tests && exec autom4te --language=autotest -o $@ $<
.PRECIOUS: $(abs_srcdir)/tests/testsuite