Add --with-libite=PATH to configure script to use external libite

This commit makes it possible to build Finit with an external libite.
Without this configure script option the libite submodule is used.

With an external libite we make sure to set the SONAME to libite.so.2
to prevent runtime ABI issues with older libite versions.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

Makefile

@@ -52,9 +52,9 @@ CPPFLAGS   += -U_FORTIFY_SOURCE
 CPPFLAGS   += -I$(TOPDIR)
 CPPFLAGS   += -D_XOPEN_SOURCE=600 -D_BSD_SOURCE -D_GNU_SOURCE -D_DEFAULT_SOURCE
 CPPFLAGS   += -DVERSION=\"$(VERSION)\" -DWHOAMI=\"`whoami`@`hostname`\"
-LDFLAGS    += -L$(TOPDIR)/libite -L$(TOPDIR)/libuev
-DEPLIBS     = libite/libite.a libuev/libuev.a
-LDLIBS     += -lite -luev
+LDFLAGS    += -L$(TOPDIR)/libuev
+DEPLIBS    += libuev/libuev.a
+LDLIBS     += -luev
 
 include common.mk
 
@@ -86,7 +86,9 @@ install-exec: all
 	done
 	printf "  INSTALL $(DESTDIR)$(sbindir)/telinit\n"
 	@ln -sf  finit $(DESTDIR)$(sbindir)/telinit
+ifndef LIBITE
 	$(MAKE) -C libite  install-exec
+endif
 	$(MAKE) -C plugins install
 
 install-data:
@@ -103,7 +105,9 @@ install-dev:
 		printf "  INSTALL $(DESTDIR)$(incdir)/$$file\n";	\
 		$(INSTALL) -m 0644 $$file $(DESTDIR)$(incdir)/$$file;	\
 	done
+ifndef LIBITE
 	$(MAKE) -C libite install-dev
+endif
 	$(MAKE) -C libuev install-dev
 
 install: install-exec install-data install-dev
@@ -116,7 +120,9 @@ uninstall-exec:
 	-@rm  $(DESTDIR)$(sbindir)/initctl
 	-@rmdir $(DESTDIR)$(sbindir) 2>/dev/null
 	-@rmdir $(DESTDIR)$(FINIT_RCSD) 2>/dev/null
+ifndef LIBITE
 	$(MAKE) -C libite  uninstall
+endif
 	$(MAKE) -C plugins uninstall
 
 uninstall-data:
@@ -134,18 +140,22 @@ uninstall: uninstall-exec uninstall-data uninstall-dev
 
 clean:
 	+$(MAKE) -C plugins $@
+ifndef LIBITE
 	+$(MAKE) -C libite  $@
+endif
 	+$(MAKE) -C libuev  $@
 	-@$(RM) $(OBJS) $(DEPS) $(EXEC)
 
 distclean: clean
 	+$(MAKE) -C plugins $@
+ifndef LIBITE
 	+$(MAKE) -C libite  $@
+endif
 	+$(MAKE) -C libuev  $@
 	-@$(RM) $(JUNK) config.mk config.h unittest *.o *.html
 
 check:
-	$(CHECK) *.c plugins/*.c libite/*.c
+	$(CHECK) *.c plugins/*.c
 
 dist:
 	@if [ x"$(ARCHTOOL)" = x"" ]; then \