# -*- Makefile -*-

top_srcdir      := @top_srcdir@
srcdir          := @srcdir@
abstop_srcdir   := $(shell readlink -e ${top_srcdir})
abssrcdir       := $(shell readlink -e ${srcdir})

ifeq (${abstop_srcdir},)
$(error Path resolution of ${top_srcdir} failed)
endif
ifeq (${abssrcdir},)
$(error Path resolution of ${srcdir} failed)
endif

prefix          := @prefix@
exec_prefix     := @exec_prefix@
libdir          := @libdir@
libexecdir      := @libexecdir@
xtlibdir        := @xtlibdir@
kbuilddir       := @kbuilddir@

CC              := @CC@
CCLD            := ${CC}
CFLAGS          := @CFLAGS@
LDFLAGS         := @LDFLAGS@
regular_CFLAGS  := @regular_CFLAGS@
kinclude_CFLAGS := @kinclude_CFLAGS@
xtables_CFLAGS  := @xtables_CFLAGS@

AM_CFLAGS      := ${regular_CFLAGS} -I${top_srcdir}/include ${xtables_CFLAGS} ${kinclude_CFLAGS}
AM_DEPFLAGS     = -Wp,-MMD,$(@D)/.$(@F).d,-MT,$@

ifeq (${V},)
AM_LIBTOOL_SILENT = --silent
AM_VERBOSE_CC     = @echo "  CC      " $@;
AM_VERBOSE_CCLD   = @echo "  CCLD    " $@;
AM_VERBOSE_CXX    = @echo "  CXX     " $@;
AM_VERBOSE_CXXLD  = @echo "  CXXLD   " $@;
AM_VERBOSE_AR     = @echo "  AR      " $@;
AM_VERBOSE_GEN    = @echo "  GEN     " $@;
endif

#
#	Wildcard module list
#
include ${top_srcdir}/mconfig
-include ${top_srcdir}/mconfig.*
include ${srcdir}/Mbuild
-include ${srcdir}/Mbuild.*
-include ${srcdir}/*.Mbuild


#
#	Building blocks
#
targets := ${obj-m}
targets_install := ${obj-m}

.SECONDARY:

.PHONY: all install clean distclean FORCE

all: modules user matches.man targets.man

user: ${targets}

install: modules_install ${targets_install}
	@mkdir -p "${DESTDIR}${xtlibdir}";
	install -pm0755 ${targets_install} "${DESTDIR}${xtlibdir}/";

clean: clean_modules
	rm -f *.oo *.so;

distclean: clean
	rm -f .*.d .manpages.lst;

-include .*.d


#
#	Call out to kbuild
#
.PHONY: modules modules_install clean_modules

modules:
	make -C ${kbuilddir} M=${abssrcdir} XA_TOPSRCDIR=${abstop_srcdir} modules;

modules_install:
	make -C ${kbuilddir} M=${abssrcdir} XA_TOPSRCDIR=${abstop_srcdir} INSTALL_MOD_PATH=${DESTDIR} modules_install;

clean_modules:
	make -C ${kbuilddir} M=${abssrcdir} XA_TOPSRCDIR=${abstop_srcdir} clean;


#
#	Shared libraries
#
lib%.so: lib%.oo
	${AM_VERBOSE_CCLD} ${CCLD} ${AM_LDFLAGS} -shared ${LDFLAGS} -o $@ $<;

lib%.oo: ${srcdir}/lib%.c
	${AM_VERBOSE_CC} ${CC} ${AM_DEPFLAGS} ${AM_CFLAGS} -D_INIT=lib$*_init -DPIC -fPIC ${CFLAGS} -o $@ -c $<;


#
#	Manpages
#
wcman_matches := $(wildcard ${srcdir}/libxt_[a-z]*.man)
wcman_targets := $(wildcard ${srcdir}/libxt_[A-Z]*.man)
wlist_matches := $(patsubst ${srcdir}/libxt_%.man,%,${wcman_matches})
wlist_targets := $(patsubst ${srcdir}/libxt_%.man,%,${wcman_targets})

.manpages.lst: FORCE
	@echo "${wlist_targets} ${wlist_matches}" >$@.tmp; \
	cmp -s $@ $@.tmp || mv $@.tmp $@; \
	rm -f $@.tmp;

man_run    = \
	${AM_VERBOSE_GEN} \
	for ext in $(1); do \
		f="${srcdir}/libxt_$$ext.man"; \
		if [ -f "$$f" ]; then \
			echo ".SS $$ext"; \
			cat "$$f"; \
			continue; \
		fi; \
	done >$@;

matches.man: .manpages.lst ${wcman_matches}
	$(call man_run,${wlist_matches})

targets.man: .manpages.lst ${wcman_targets}
	$(call man_run,${wlist_targets})