#!/usr/bin/make -f
# Copyright 1994,1995 by Ian Jackson.
# I hereby give you perpetual unlimited permission to copy,
# modify and relicense this file, provided that you do not remove
# my name from the file itself.  (I assert my moral right of
# paternity under the Copyright, Designs and Patents Act 1988.)
# This file may have to be extensively modified

# Rather paranoid than sorry. Make the shell exit with an error if an
# untested command fails.
SHELL+= -e

# S-lang's does not support --srcdir properly. If it would, this rules file
# could be made a lot easier. Now we have to do this by hand. We build the
# libc6 stuff in the regular place, and the libc5 stuff under
# debian/libc5build. This rules file is being invoked recursively, from
# different directories, for certain targets.

ARCH=$(shell dpkg --print-gnu-build-architecture)

# Determine whether it makes sense to build libc5 binaries for this
# architecture.

# architectures that need libc5-compat support
COMPAT_ARCHS=i486 m68k sparc

ifneq (,$(findstring $(ARCH), $(COMPAT_ARCHS)))
  COMPAT := /bin/true
else
  COMPAT := /bin/false
endif

# For which libc do we build? This variable is also used to determine if
# this is the top invocation, or a recursive one.
buildforlibc=top

ifeq ($(buildforlibc),top)
  export DEBIAN=$(shell pwd)/debian
endif

ifeq ($(buildforlibc),5)
# libc5 compatibility packages
  CC=/usr/$(ARCH)-linuxlibc1/bin/gcc
  package=slang0.99.34
  package-dev=slang0.99.34-dev
  SONAME=libslang.so.0.99.34
  prefix=usr/$(ARCH)-linuxlibc1
  LIBDIR = $(DEBIAN)/tmp-lib-libc5
  DEVDIR = $(DEBIAN)/tmp-dev-libc5
  SHAREDLIBDIR = usr/lib/libc5-compat
else
  CC=gcc
  package=slang0.99.38
  package-dev=slang0.99.38-dev
  package-pic=slang0.99.38-pic
  SONAME=libslang.so.0.99.38
  PICNAME=libslang0.99.38_pic.a
  # both for configure and make install. Don't use a leading slash!
  prefix=usr
  LIBDIR = $(DEBIAN)/tmp-lib-libc6
  DEVDIR = $(DEBIAN)/tmp-dev-libc6
  PICDIR = $(DEBIAN)/tmp-pic-libc6
  SHAREDLIBDIR = lib
endif

# The version of the package (for example, `19.28').
version=0.99.38

make_directory=  install -p -d -o root -g root -m 755
install_binary=  install -p -s -o root -g root -m 755
install_library= install -p    -o root -g root -m 644
install_script=  install -p    -o root -g root -m 755
install_files=   install -p    -o root -g root -m 644

CFLAGS   = -O2 -g -Wall
THIS_LIB_DEFINES = -DSLANG -D_REENTRANT
CURRENT=libslang.so.$(version)
CONFIGJUNK = Makefile config.cache config.log config.status config.h
# TODO: remove
#LIBDIR = debian/tmp-lib
#DEVDIR = debian/tmp-dev
PWD = `pwd`

# The next section may have to be extensively modified

$(DEBIAN)/../build: build

build:  $(checkdir)
ifeq ($(buildforlibc),top)
	debian/rules copy
	if $(COMPAT) ; then \
	  cd debian/libc5build ; \
	  ../rules buildforlibc=5 checklibcenvironment build ; \
	fi
	debian/rules buildforlibc=6 checklibcenvironment build
	touch $(DEBIAN)/../build
else
	@echo "Building the binaries for libc$(buildforlibc)..."
	env CC=$(CC) INSTALL="install -p" ./configure --prefix=/$(prefix)
	# ELFLIB_MAJOR is the SONAME
	# ELFLIB_MAJOR_MINOR is the -o filename
	$(MAKE) CC="$(CC)" elf THIS_LIB_DEFINES="$(THIS_LIB_DEFINES)" \
		CFLAGS="$(CFLAGS)" ELFLIB_MAJOR="$(SONAME)" \
		ELFLIB_MAJOR_MINOR="$(CURRENT)" \
		LIBDIR=-L$(LIBDIR)
	(cd src; for i in calc worm untic; do \
		$(MAKE) $i CFLAGS="$(CFLAGS)" OBJDIR=elfobjs ; done)
	$(MAKE) CC="$(CC)" THIS_LIB_DEFINES="$(THIS_LIB_DEFINES)" CFLAGS="$(CFLAGS)"
endif	

copy:
	if $(COMPAT) ; then \
	  mkdir -p debian/libc5build ; \
	  cp -r autoconf configure demo doc help src debian/libc5build ; \
	fi

checklibcenvironment:
# Sanity check: make sure that we are actually building against the libc
# we want to build against.
	@if ( cd /tmp ; \
	     echo "int main() { exit(0); }" > libctest.c && \
	     $(CC) -o libctest libctest.c && \
	     ldd libctest | grep -q 'libc\.so\.$(buildforlibc)' ) ; \
	 then \
	   echo "Checked: libc6 environment" ; \
         else \
	   echo "Error: this targets requires libc$(buildforlibc)"; \
	   echo "PATH=$$PATH" ; \
	   echo "gcc = `which gcc`" ; \
	   exit 1 ; \
         fi
	-@rm -f debian/a.out debian/test.c

clean:
	$(checkdir)
	@echo "Cleaning up after 'make build' ..."
	-rm -f build
	-$(MAKE) -i clean || $(MAKE) -f Makefile.in distclean
	-rm -f $(CONFIGJUNK) man/index.db
	-cd debian && rm -rf tmp-lib-libc5 tmp-lib-libc6 \
			tmp-dev-libc5 tmp-dev-libc6 tmp-pic-libc6 \
			debian*~ substvars files files.new \
			a.out test.c libc5build
	-cd src && rm -rf objs elfobjs Makefile config.h sysconf.h
	-cd demo && rm -rf Makefile config.status config.h config.log

binary-indep:
# There are no architecture-independent files to be uploaded
# generated by this package.  If there were any they would be
# made here.

binary-lib:
	@echo "Making the binary package: $(package) for libc$(buildforlibc)..."
	rm -rf $(LIBDIR)
	$(make_directory) $(LIBDIR)/DEBIAN
	$(make_directory) $(LIBDIR)/$(SHAREDLIBDIR)
	$(make_directory) $(LIBDIR)/usr/doc/$(package)
ifeq ($(buildforlibc),6)
	ln -s $(package) $(LIBDIR)/usr/doc/slang
endif
	$(install_script) $(DEBIAN)/postinst.$(package) $(LIBDIR)/DEBIAN/postinst
	-$(install_script) $(DEBIAN)/preinst.$(package) $(LIBDIR)/DEBIAN/preinst
	$(install_files) $(DEBIAN)/shlibs.$(package) $(LIBDIR)/DEBIAN/shlibs
	$(install_files) $(DEBIAN)/copyright $(LIBDIR)/usr/doc/$(package)
	$(install_files) $(DEBIAN)/../changes.txt $(LIBDIR)/usr/doc/$(package)/changelog
	$(install_files) $(DEBIAN)/changelog \
		$(LIBDIR)/usr/doc/$(package)/changelog.Debian
	$(install_library) src/elfobjs/$(CURRENT) $(LIBDIR)/$(SHAREDLIBDIR)
	strip --strip-unneeded $(LIBDIR)/$(SHAREDLIBDIR)/$(CURRENT)
ifeq ($(buildforlibc),5)
	# Compatibility links (may help someone)
	cd $(LIBDIR)/$(SHAREDLIBDIR) ; \
		ln -fs $(CURRENT) libslang.so.0.99.37 ; \
		ln -fs $(CURRENT) libslang.so.0 ; \
		ln -fs $(CURRENT) $(SONAME)
endif
	gzip -9 $(LIBDIR)/usr/doc/$(package)/changelog*
# undefined LD_PRELOAD to prevent spurious libcx dependency due to fakeroot
	HLP=`pwd` ; cd $(DEBIAN)/.. ; \
	  env LD_PRELOAD= \
	     dpkg-shlibdeps $$HLP/src/elfobjs/$(CURRENT) ; \
	  dpkg-gencontrol -P$(LIBDIR) -p$(package) ; \
	  chown -R root.root $(LIBDIR) ; \
	  dpkg --build $(LIBDIR) ..

binary-dev:
	@echo "Making the binary package: $(package-dev) for libc$(buildforlibc)..."
	rm -rf $(DEVDIR)
	$(make_directory) $(DEVDIR)/DEBIAN
	$(make_directory) $(DEVDIR)/$(prefix)/lib
	$(make_directory) $(DEVDIR)/$(prefix)/include
	$(make_directory) $(DEVDIR)/usr/doc/$(package)/doc
	$(make_directory) $(DEVDIR)/usr/doc/$(package)/demo
	$(make_directory) $(DEVDIR)/usr/doc/$(package)/help
	$(install_script) $(DEBIAN)/postinst.$(package-dev) $(DEVDIR)/DEBIAN/postinst
	ln -s $(package) $(DEVDIR)/usr/doc/$(package-dev)
	$(install_files) $(DEBIAN)/README.examples $(DEVDIR)/usr/doc/$(package)
	$(MAKE) install INSTALL="install -p" prefix=$(DEVDIR)/$(prefix)
	# Make the .so link needed for the linker to find the library
ifeq ($(buildforlibc),6)
	(cd $(DEVDIR)/$(prefix)/lib; ln -s ../../$(SHAREDLIBDIR)/$(CURRENT) libslang.so)
else
	(cd $(DEVDIR)/$(prefix)/lib; ln -s ../../../$(SHAREDLIBDIR)/$(CURRENT) libslang.so)
endif
	strip --strip-debug $(DEVDIR)/$(prefix)/lib/libslang.a
	(cd demo; $(MAKE) clean; rm -f $(CONFIGJUNK))
	$(install_files) `ls demo/[^o]*` \
		src/jdmacros.h src/sltermin.c src/_slang.h src/worm.c \
		src/untic.c \
		$(DEVDIR)/usr/doc/$(package)/demo
	ln -s ../../../include/slang.h $(DEVDIR)/usr/doc/$(package)/demo/slang.h
	cd $(DEVDIR)/usr/doc/$(package)/demo &&\
		rm -f Makefile.in config* makefile.dos
	$(install_files) doc/* $(DEVDIR)/usr/doc/$(package)/doc
	$(install_files) help/* $(DEVDIR)/usr/doc/$(package)/help
	ln -s ../demo/jdmacros.h $(DEVDIR)/usr/doc/$(package)/help/jdmacros.h
	ln -s ../demo/config.h $(DEVDIR)/usr/doc/$(package)/help/config.h
	$(install_files) src/config.h src/calc.c src/calc.sl \
		$(DEVDIR)/usr/doc/$(package)/demo
	ln -s ../demo/calc.c $(DEVDIR)/usr/doc/$(package)/doc/calc.c
	cd $(DEVDIR)/usr/doc/$(package)/help && rm -f makefile.djg makefile.os2
# there must be a better way to do this...
# dpkg-shlibdeps will not have noted the slang dependency if we're compiling
# on a machine that doesn't have slang installed yet. Hack around this:
	HLP=`pwd` ; cd $(DEBIAN)/.. ; \
	  dpkg-shlibdeps $$HLP/src/elfobjs/calc ; \
	  if ! grep slang debian/substvars ; then \
	    mv debian/substvars debian/substvars.old ; \
	    sed -e 's/)$$/), $(package) (>= $(version))/' debian/substvars.old > debian/substvars ; \
	    rm debian/substvars.old ; \
	  fi
ifeq ($(buildforlibc),5)
	cd $(DEVDIR)/usr/doc/$(package) && rm -rf doc demo help
endif
	cd $(DEBIAN)/.. ; dpkg-gencontrol -P$(DEVDIR) -p$(package-dev)
	chown -R root.root $(DEVDIR)
	dpkg --build $(DEVDIR) $(DEBIAN)/../..

binary-pic:
ifeq ($(buildforlibc),6)
	@echo "Making the binary package: $(package-pic) for libc$(buildforlibc)..."
	rm -rf $(PICDIR)
	$(make_directory) $(PICDIR)/DEBIAN
	$(make_directory) $(PICDIR)/$(prefix)/lib
	$(make_directory) $(PICDIR)/usr/doc
	cd $(PICDIR)/usr/doc ; ln -s $(package-dev) $(package-pic)
	ar cqv $(PICDIR)/$(prefix)/lib/$(PICNAME) \
		`lorder src/elfobjs/*.o | tsort`
	cd $(DEBIAN)/.. ; dpkg-gencontrol -P$(PICDIR) -p$(package-pic)
	chown -R root.root $(PICDIR)
	dpkg --build $(PICDIR) $(DEBIAN)/../..
endif

binary-join-us: binary-indep binary-lib binary-dev binary-pic

binary-arch: checkroot $(DEBIAN)/../build
ifeq ($(buildforlibc),top)
	if $(COMPAT) ; then \
	  cd debian/libc5build ; \
	    ../rules buildforlibc=5 binary-join-us ; \
        fi
	debian/rules buildforlibc=6 binary-join-us
endif

binary: binary-indep binary-arch


checkroot:
	test root = "`whoami`"


define checkdir
	test -f slang.lis -a -f debian/rules
endef


.PHONY: binary binary-indep binary-lib binary-dev binary-pic binary-arch dist update clean checkroot