linux-kbuild: Add objtool

debian/changelog

@@ -9,6 +9,7 @@ linux (4.15~rc5-1~exp1) UNRELEASED; urgency=medium
     phram when locked down"
   * cpupower: Move library to multiarch directory
   * [rt] Disable until it is updated for 4.15 or later
+  * linux-kbuild: Add objtool
 
  -- Ben Hutchings <ben@decadent.org.uk>  Tue, 26 Dec 2017 16:25:55 +0000
 

debian/rules.d/tools/Makefile

@@ -1,6 +1,7 @@
 SUBDIRS = \
 	hv \
 	lib/lockdep \
+	objtool \
 	perf \
 	power \
 	usb/usbip

debian/rules.d/tools/objtool/Makefile

@@ -0,0 +1,9 @@
+include $(top_rulesdir)/Makefile.inc
+
+all:
+# For now, only supported target architecture is x86.  Later we'll need to build
+# for multiple targets and add a wrapper, same as for modpost.
+	$(MAKE) -C $(top_srcdir)/tools/objtool O=$(CURDIR) ARCH=x86
+
+install:
+	install -D -m755 objtool $(DESTDIR)/$(installdir)/objtool

debian/rules.real

@@ -548,6 +548,7 @@ install-kbuild: $(STAMPS_DIR)/build-tools
 	dh_testroot
 	dh_prep
 	$(call make-tools,scripts) install DESTDIR=$(DIR) prefix=$(PREFIX_DIR)
+	$(call make-tools,tools/objtool) install DESTDIR=$(DIR) prefix=$(PREFIX_DIR)
 	dh_link $(PREFIX_DIR) /usr/src/$(PACKAGE_NAME)
 	dh_installchangelogs
 	dh_installdocs