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
 # ---------------------------------------------------------------------------