kbuild: rpm-pkg: do not hard-code $MAKE in spec file

Currently, $MAKE will expand to the GNU Make program that created the
source RPM. This is problematic if you carry it to a different build
host to run 'rpmbuild' there.

Consider this command:

  $ /path/to/my/custom/make srcrpm-pkg

The spec file in the SRPM will record '/path/to/my/custom/make', which
exists only on that build environment.

To create a portable SRPM, the spec file should avoid hard-coding $MAKE.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

scripts/Makefile.package

@@ -72,7 +72,7 @@ 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) \
-	--define='_smp_mflags %{nil}'
+	--define='_smp_mflags %{nil}' --define='make $(MAKE)'
 
 # srcrpm-pkg
 # ---------------------------------------------------------------------------
@@ -89,7 +89,8 @@ binrpm-pkg:
 	$(MAKE) -f $(srctree)/Makefile
 	$(CONFIG_SHELL) $(MKSPEC) prebuilt > $(objtree)/binkernel.spec
 	+rpmbuild $(RPMOPTS) --define "_builddir $(objtree)" --target \
-		$(UTS_MACHINE)-linux -bb $(objtree)/binkernel.spec
+		$(UTS_MACHINE)-linux -bb $(objtree)/binkernel.spec \
+		--define='make $(MAKE)'
 
 # deb-pkg srcdeb-pkg bindeb-pkg
 # ---------------------------------------------------------------------------

scripts/package/mkspec

@@ -38,6 +38,8 @@ EXCLUDES="$RCS_TAR_IGNORE --exclude=*vmlinux* --exclude=*.mod \
 #  $S: this line is enabled only when building source package
 #  $M: this line is enabled only when CONFIG_MODULES is enabled
 sed -e '/^DEL/d' -e 's/^\t*//' <<EOF
+%{!?make: %define make make}
+
 	Name: kernel
 	Summary: The Linux Kernel
 	Version: $__KERNELRELEASE
@@ -89,19 +91,19 @@ $S	cp %{SOURCE1} .config
 $S	patch -p1 < %{SOURCE2}
 $S
 $S	%build
-$S	$MAKE %{?_smp_mflags} KERNELRELEASE=$KERNELRELEASE KBUILD_BUILD_VERSION=%{release}
+$S	%{make} %{?_smp_mflags} KERNELRELEASE=$KERNELRELEASE KBUILD_BUILD_VERSION=%{release}
 $S
 	%install
 	mkdir -p %{buildroot}/boot
 	%ifarch ia64
 	mkdir -p %{buildroot}/boot/efi
-	cp \$($MAKE -s image_name) %{buildroot}/boot/efi/vmlinuz-$KERNELRELEASE
+	cp \$(%{make} -s image_name) %{buildroot}/boot/efi/vmlinuz-$KERNELRELEASE
 	ln -s efi/vmlinuz-$KERNELRELEASE %{buildroot}/boot/
 	%else
-	cp \$($MAKE -s image_name) %{buildroot}/boot/vmlinuz-$KERNELRELEASE
+	cp \$(%{make} -s image_name) %{buildroot}/boot/vmlinuz-$KERNELRELEASE
 	%endif
-$M	$MAKE %{?_smp_mflags} INSTALL_MOD_PATH=%{buildroot} modules_install
-	$MAKE %{?_smp_mflags} INSTALL_HDR_PATH=%{buildroot}/usr headers_install
+$M	%{make} %{?_smp_mflags} INSTALL_MOD_PATH=%{buildroot} modules_install
+	%{make} %{?_smp_mflags} INSTALL_HDR_PATH=%{buildroot}/usr headers_install
 	cp System.map %{buildroot}/boot/System.map-$KERNELRELEASE
 	cp .config %{buildroot}/boot/config-$KERNELRELEASE
 $S$M	rm -f %{buildroot}/lib/modules/$KERNELRELEASE/build