#
# defines
#
topdir=$(shell pwd)/..
include ../Make.Rules
#
# Library version
#
LIBNAME=$(LIBTITLE).so
STACAPLIBNAME=$(LIBTITLE).a
#
STAPSXLIBNAME=libpsx.a

CAPFILES=cap_alloc cap_proc cap_extint cap_flag cap_text cap_file
PSXFILES=../psx/psx

INCLS=libcap.h cap_names.h $(INCS)
CAPOBJS=$(addsuffix .o, $(CAPFILES))
PSXOBJS=$(addsuffix .o, $(PSXFILES))

MAJLIBNAME=$(LIBNAME).$(VERSION)
MINLIBNAME=$(MAJLIBNAME).$(MINOR)
GPERF_OUTPUT = _caps_output.gperf

all: $(MINLIBNAME) $(STACAPLIBNAME) pcs $(STAPSXLIBNAME)

pcs: libcap.pc libpsx.pc

ifeq ($(BUILD_GPERF),yes)
USE_GPERF_OUTPUT = $(GPERF_OUTPUT)
INCLUDE_GPERF_OUTPUT = -DINCLUDE_GPERF_OUTPUT='"$(GPERF_OUTPUT)"'
endif

libcap.pc: libcap.pc.in
	sed -e 's,@prefix@,$(prefix),' \
		-e 's,@exec_prefix@,$(exec_prefix),' \
		-e 's,@libdir@,$(LIBDIR),' \
		-e 's,@includedir@,$(inc_prefix)/include,' \
		-e 's,@VERSION@,$(VERSION).$(MINOR),' \
		-e 's,@deps@,$(DEPS),' \
		$< >$@

libpsx.pc: libpsx.pc.in
	sed -e 's,@prefix@,$(prefix),' \
		-e 's,@exec_prefix@,$(exec_prefix),' \
		-e 's,@libdir@,$(LIBDIR),' \
		-e 's,@includedir@,$(inc_prefix)/include,' \
		-e 's,@VERSION@,$(VERSION).$(MINOR),' \
		-e 's,@deps@,$(DEPS),' \
		$< >$@

_makenames: _makenames.c cap_names.list.h
	$(BUILD_CC) $(BUILD_CFLAGS) $< -o $@

cap_names.h: _makenames
	./_makenames > cap_names.h

$(GPERF_OUTPUT): cap_names.list.h
	perl -e 'print "struct __cap_token_s { const char *name; int index; };\n%{\nconst struct __cap_token_s *__cap_lookup_name(const char *, size_t);\n%}\n%%\n"; while ($$l = <>) { $$l =~ s/[\{\"]//g; $$l =~ s/\}.*// ; print $$l; }' < $< | gperf --ignore-case --language=ANSI-C --readonly --null-strings --global-table --hash-function-name=__cap_hash_name --lookup-function-name="__cap_lookup_name" -c -t -m20 $(INDENT) > $@
	sed -e 's/unsigned int len/size_t len/' -i $@

# Intention is that libcap keeps up with torvalds' tree, as reflected
# by this maintained version of the kernel header. libcap dynamically
# trims the meaning of "all" capabilities down to that of the running
# kernel as of 2.30.
UAPI_HEADER := $(topdir)/libcap/include/uapi/linux/capability.h
cap_names.list.h: Makefile $(UAPI_HEADER)
	@echo "=> making $@ from $(UAPI_HEADER)"
	perl -e 'while ($$l=<>) { if ($$l =~ /^\#define[ \t](CAP[_A-Z]+)[ \t]+([0-9]+)\s+$$/) { $$tok=$$1; $$val=$$2; $$tok =~ tr/A-Z/a-z/; print "{\"$$tok\",$$val},\n"; } }' $(UAPI_HEADER) | fgrep -v 0x > $@

$(STACAPLIBNAME): $(CAPOBJS)
	$(AR) rcs $@ $^
	$(RANLIB) $@

$(STAPSXLIBNAME): $(PSXOBJS)
	$(AR) rcs $@ $^
	$(RANLIB) $@

$(MINLIBNAME): $(CAPOBJS)
	$(LD) $(CFLAGS) $(LDFLAGS) -Wl,-soname,$(MAJLIBNAME) -o $@ $^
	ln -sf $(MINLIBNAME) $(MAJLIBNAME)
	ln -sf $(MAJLIBNAME) $(LIBNAME)

%.o: %.c $(INCLS)
	$(CC) $(CFLAGS) $(IPATH) -c $< -o $@

cap_text.o: cap_text.c $(USE_GPERF_OUTPUT) $(INCLS)
	$(CC) $(CFLAGS) $(IPATH) $(INCLUDE_GPERF_OUTPUT) -c $< -o $@

cap_test: cap_test.c libcap.h
	$(CC) $(CFLAGS) $(IPATH) $< -o $@

test: cap_test
	./cap_test

install: install-shared install-static

install-common: pcs
	mkdir -p -m 0755 $(FAKEROOT)$(INCDIR)/sys
	install -m 0644 include/sys/capability.h $(FAKEROOT)$(INCDIR)/sys
	install -m 0644 include/sys/psx_syscall.h $(FAKEROOT)$(INCDIR)/sys
	mkdir -p -m 0755 $(FAKEROOT)$(PKGCONFIGDIR)
	install -m 0644 libcap.pc $(FAKEROOT)$(PKGCONFIGDIR)/libcap.pc
	install -m 0644 libpsx.pc $(FAKEROOT)$(PKGCONFIGDIR)/libpsx.pc

install-static: $(STACAPLIBNAME) $(STAPSXLIBNAME) install-common
	mkdir -p -m 0755 $(FAKEROOT)$(LIBDIR)
	install -m 0644 $(STACAPLIBNAME) $(FAKEROOT)$(LIBDIR)/$(STACAPLIBNAME)
	install -m 0644 $(STAPSXLIBNAME) $(FAKEROOT)$(LIBDIR)/$(STAPSXLIBNAME)

install-shared: $(MINLIBNAME) install-common
	install -m 0644 $(MINLIBNAME) $(FAKEROOT)$(LIBDIR)/$(MINLIBNAME)
	ln -sf $(MINLIBNAME) $(FAKEROOT)$(LIBDIR)/$(MAJLIBNAME)
	ln -sf $(MAJLIBNAME) $(FAKEROOT)$(LIBDIR)/$(LIBNAME)
ifeq ($(FAKEROOT),)
	-/sbin/ldconfig
endif

clean:
	$(LOCALCLEAN)
	rm -f $(CAPOBJS) $(LIBNAME)* $(STACAPLIBNAME) libcap.pc libpsx.pc
	rm -f $(PSXOBJS) $(STAPSXLIBNAME)
	rm -f cap_names.h cap_names.list.h _makenames $(GPERF_OUTPUT) cap_test
	cd include/sys && $(LOCALCLEAN)