### @configure_input@

# Copyright (C) 2023 Free Software Foundation, Inc.

# This file is part of GNU Emacs.

# GNU Emacs 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.

# GNU Emacs 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 GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.

top_srcdir = @top_srcdir@
srcdir = @srcdir@
top_builddir = @top_builddir@
builddir = @builddir@

-include $(top_builddir)/src/verbose.mk

# Cross-compiling Emacs for Android.

# The cross compiled binaries are built by having ``variant''
# Makefiles generated at configure-time.  First,
# $(top_builddir)/src/Makefile.android,
# $(top_builddir)/lib/Makefile.android,
# $(top_builddir)/lib/gnulib.mk.android and
# $(top_builddir)/lib-src/Makefile.android are copied to their usual
# locations in this directory.

# N.B. that LIB_SRCDIR is actually relative to builddir, because that
# is where the gnulib files get linked.

LIB_SRCDIR = $(realpath $(builddir)/lib)
LIB_TOP_SRCDIR = $(realpath $(top_srcdir))

SRC_SRCDIR = $(realpath $(top_srcdir)/src)
SRC_TOP_SRCDIR = $(realpath $(top_srcdir))

LIB_SRC_SRCDIR = $(realpath $(top_srcdir)/lib-src)
LIB_SRC_TOP_SRCDIR = $(realpath $(top_src))

# This is a list of binaries to build and install in lib-src.

LIBSRC_BINARIES = lib-src/etags lib-src/ctags lib-src/emacsclient \
		  lib-src/ebrowse lib-src/hexl lib-src/movemail

CLEAN_SUBDIRS=src lib-src lib

.PHONY: all
all: lib/libgnu.a src/libemacs.so src/android-emacs $(LIBSRC_BINARIES)

# This Makefile relies on builddir and top_builddir being relative
# paths in *.android.

# This file is used to tell lib/gnulib.mk when
# $(top_builddir)/config.status changes.
config.status: $(top_builddir)/config.status
	$(AM_V_GEN) touch config.status

src/verbose.mk: $(srcdir)/verbose.mk.android
	$(AM_V_SILENT) cp -f $(srcdir)/verbose.mk.android \
	  src/verbose.mk

# Gnulib, make-fingerprint and make-docfile must be built before
# entering any of the rules below, or they will get the Android
# versions of many headers.

.PHONY: $(top_builddir)/lib/libgnu.a
$(top_builddir)/lib/libgnu.a:
	$(MAKE) -C $(top_builddir)/lib libgnu.a

.PHONY: $(top_builddir)/lib-src/make-fingerprint
$(top_builddir)/lib-src/make-fingerprint: $(top_builddir)/lib/libgnu.a
	$(MAKE) -C $(top_builddir)/lib-src make-fingerprint

.PHONY: $(top_builddir)/lib-src/make-docfile
$(top_builddir)/lib-src/make-docfile: $(top_builddir)/lib/libgnu.a
	$(MAKE) -C $(top_builddir)/lib-src make-docfile

PRE_BUILD_DEPS=$(top_builddir)/lib/libgnu.a		\
	       $(top_builddir)/lib-src/make-fingerprint	\
	       $(top_builddir)/lib-src/make-docfile

lib/config.h: $(top_builddir)/src/config.h.android
	$(AM_V_GEN) cp -f -p $(top_builddir)/src/config.h.android	\
	  lib/config.h

lib-src/config.h: $(top_builddir)/src/config.h.android
	$(AM_V_GEN) cp -f -p $(top_builddir)/src/config.h.android	\
	  lib-src/config.h

lib/gnulib.mk: $(top_builddir)/lib/gnulib.mk.android
	$(AM_V_GEN) \
	  sed -e 's/^srcdir =.*$$/srcdir = $(subst /,\/,$(LIB_SRCDIR))/g' \
	    < $(top_builddir)/lib/gnulib.mk.android > $@

lib/Makefile: $(top_builddir)/lib/Makefile.android
	$(AM_V_GEN) \
	  sed -e 's/^top_srcdir =.*$$/top_srcdir = $(subst /,\/,$(LIB_TOP_SRCDIR))/g' \
	      -e 's/^srcdir =.*$$/srcdir = $(subst /,\/,$(LIB_SRCDIR))/g' \
	      -e 's/^VPATH =.*$$/VPATH = $(subst /,\/,$(LIB_SRCDIR))/g' \
		< $(top_builddir)/lib/Makefile.android > $@

# What is needed to build gnulib.
LIB_DEPS = lib/config.h lib/gnulib.mk lib/Makefile

.PHONY: lib/libgnu.a
lib/libgnu.a: src/verbose.mk config.status $(LIB_DEPS) $(PRE_BUILD_DEPS)
	$(MAKE) -C lib libgnu.a

# Edit srcdir and top_srcdir to the right locations.
# Edit references to ../admin/unidata to read ../../admin/unidata.
# Next, edit libsrc to the location at top_srcdir! It is important
# that src/Makefile uses the binaries there, instead of any
# cross-compiled binaries at ./lib-src.
# Edit out anything saying -I($(top_srcdir)/lib) into
# -I$../(srcdir)/lib; that should be covered by -I$(lib)

src/Makefile: $(top_builddir)/src/Makefile.android
	$(AM_V_GEN) \
	sed -e 's/^srcdir =.*$$/srcdir = $(subst /,\/,$(SRC_SRCDIR))/g' \
	    -e 's/^top_srcdir =.*$$/top_srcdir = $(subst /,\/,$(LIB_TOP_SRCDIR))/g' \
	    -e 's/\.\.\/admin\/unidata/..\/..\/admin\/unidata/g' \
	    -e 's/\.\.\/admin\/charsets/..\/..\/admin\/charsets/g' \
	    -e 's/^libsrc =.*$$/libsrc = \.\.\/\.\.\/lib-src/g' \
	    -e 's/libsrc =.*$$/libsrc = \.\.\/\.\.\/lib-src/g' \
	    -e 's/-I\$$(top_srcdir)\/lib/-I..\/$(subst /,\/,$(srcdir))\/lib/g' \
	    < $(top_builddir)/src/Makefile.android > $@

src/config.h: $(top_builddir)/src/config.h.android
	$(AM_V_GEN) cp -f -p $< $@

.PHONY: src/android-emacs src/libemacs.so

src/libemacs.so: src/Makefile src/config.h src/verbose.mk \
  lib/libgnu.a $(PRE_BUILD_DEPS)
	$(MAKE) -C src libemacs.so

src/android-emacs: src/Makefile src/config.h lib/libgnu.a \
  $(PRE_BUILD_DEPS)
	$(MAKE) -C src android-emacs

# Edit out SCRIPTS, it interferes with the build.
# Make BASE_CFLAGS also include cross/lib as well as ../lib.

lib-src/Makefile: $(top_builddir)/lib-src/Makefile.android
	$(AM_V_GEN) \
	sed -e 's/-I\$${srcdir}\/\.\.\/lib//g' \
	    -e 's/^srcdir=.*$$/srcdir = $(subst /,\/,$(LIB_SRC_SRCDIR))/g' \
	    -e 's/^top_srcdir=.*$$/top_srcdir = $(subst /,\/,$(LIB_SRC_TOP_SRCDIR))/g' \
	    -e 's/^SCRIPTS=.*$$/SCRIPTS=/g' \
	    -e 's/-I\.\.\/lib/-I..\/lib -I..\/$(subst /,\/,$(srcdir))\/lib/g' \
	  < $(top_builddir)/lib-src/Makefile.android > $@

.PHONY: $(LIBSRC_BINARIES)
$(LIBSRC_BINARIES) &: src/verbose.mk $(top_builddir)/$@ lib/libgnu.a \
  lib-src/config.h lib-src/Makefile $(PRE_BUILD_DEPS)
# Finally, go into lib-src and make everything being built
	$(MAKE) -C lib-src $(foreach bin,$(LIBSRC_BINARIES),$(notdir $(bin)))

.PHONY: clean maintainer-clean distclean
clean:
	for dir in $(CLEAN_SUBDIRS); do \
	  find $$dir -type f -delete;   \
	done
	rm -rf lib/config.h lib-src/config.h
# ndk-build won't have been generated in a non-Android build.
	-make -C ndk-build clean

maintainer-clean distclean bootstrap-clean: clean
# Remove links created by configure.
	for dir in $(CLEAN_SUBDIRS); do \
	  find $$dir -type l -delete;   \
	done
	rm -rf lib/Makefile lib/gnulib.mk ndk-build/Makefile
	rm -rf ndk-build/ndk-build.mk Makefile