kbuild: rpm-pkg: refactor *rpm-pkg targets

Merge the similar build targets.

Also, make the output location consistent.

Previously, source packages were created in the build directory,
while binary packages under ~/rpmbuild/RPMS/.

Now, Kbuild creates the rpmbuild/ directory in the build directory,
and saves all packages under it.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

scripts/Makefile.package

@@ -11,7 +11,6 @@ TAR_CONTENT := Documentation LICENSES arch block certs crypto drivers fs \
                samples scripts security sound tools usr virt \
                .config Makefile \
                Kbuild Kconfig COPYING $(wildcard localversion*)
-MKSPEC     := $(srctree)/scripts/package/mkspec
 
 quiet_cmd_src_tar = TAR     $(2).tar.gz
       cmd_src_tar = \
@@ -66,32 +65,37 @@ $(linux-tarballs): archive-args = --prefix=linux/ $$(cat $<)
 $(linux-tarballs): .tmp_HEAD FORCE
 	$(call if_changed,archive)
 
-# rpm-pkg
+# rpm-pkg srcrpm-pkg binrpm-pkg
 # ---------------------------------------------------------------------------
-PHONY += rpm-pkg
-rpm-pkg: srpm = $(shell rpmspec --srpm --query --queryformat='%{name}-%{VERSION}-%{RELEASE}.src.rpm' kernel.spec)
-rpm-pkg: srcrpm-pkg
-	+rpmbuild $(RPMOPTS) --target $(UTS_MACHINE)-linux -rb $(srpm) \
-	--build-in-place --noprep \
-	--define='_smp_mflags %{nil}' --define='make $(MAKE)'
-
-# srcrpm-pkg
-# ---------------------------------------------------------------------------
-PHONY += srcrpm-pkg
-srcrpm-pkg: linux.tar.gz
-	$(CONFIG_SHELL) $(MKSPEC) >$(objtree)/kernel.spec
-	+rpmbuild $(RPMOPTS) --target $(UTS_MACHINE)-linux -bs kernel.spec \
-	--define='_smp_mflags %{nil}' --define='_sourcedir rpmbuild/SOURCES' --define='_srcrpmdir .'
 
-# binrpm-pkg
-# ---------------------------------------------------------------------------
-PHONY += binrpm-pkg
-binrpm-pkg:
-	$(CONFIG_SHELL) $(MKSPEC) prebuilt > $(objtree)/kernel.spec
-	+rpmbuild $(RPMOPTS) --define "_builddir $(objtree)" --target \
-		$(UTS_MACHINE)-linux -bb $(objtree)/kernel.spec \
-		--build-in-place --noprep --define='_smp_mflags %{nil}' --without devel \
-		--define='make $(MAKE)'
+quiet_cmd_mkspec = GEN     $@
+      cmd_mkspec = $(srctree)/scripts/package/mkspec > $@
+
+kernel.spec: FORCE
+	$(call cmd,mkspec)
+
+PHONY += rpm-sources
+rpm-sources: linux.tar.gz
+	$(Q)mkdir -p rpmbuild/SOURCES
+	$(Q)ln -f linux.tar.gz rpmbuild/SOURCES/linux.tar.gz
+	$(Q)cp $(KCONFIG_CONFIG) rpmbuild/SOURCES/config
+	$(Q)$(srctree)/scripts/package/gen-diff-patch rpmbuild/SOURCES/diff.patch
+
+PHONY += rpm-pkg srcrpm-pkg binrpm-pkg
+
+rpm-pkg:    private build-type := a
+srcrpm-pkg: private build-type := s
+binrpm-pkg: private build-type := b
+
+rpm-pkg srcrpm-pkg: rpm-sources
+rpm-pkg srcrpm-pkg binrpm-pkg: kernel.spec
+	+$(strip rpmbuild -b$(build-type) kernel.spec \
+	--define='_topdir $(abspath rpmbuild)' \
+	$(if $(filter a b, $(build-type)), \
+		--target $(UTS_MACHINE)-linux --build-in-place --noprep --define='_smp_mflags %{nil}') \
+	$(if $(filter b, $(build-type)), \
+		--without devel) \
+	$(RPMOPTS))
 
 # deb-pkg srcdeb-pkg bindeb-pkg
 # ---------------------------------------------------------------------------

scripts/package/mkspec

@@ -9,14 +9,6 @@
 #	Patched for non-x86 by Opencon (L) 2002 <opencon@rio.skydome.net>
 #
 
-# how we were called determines which rpms we build and how we build them
-if [ -z "$1" ]; then
-	mkdir -p rpmbuild/SOURCES
-	cp linux.tar.gz rpmbuild/SOURCES
-	cp "${KCONFIG_CONFIG}" rpmbuild/SOURCES/config
-	"${srctree}/scripts/package/gen-diff-patch" rpmbuild/SOURCES/diff.patch
-fi
-
 if grep -q CONFIG_MODULES=y include/config/auto.conf; then
 echo '%define with_devel %{?_without_devel: 0} %{?!_without_devel: 1}'
 else