kbuild: Fix calling of scripts

We source some scripts, but still pass parameters to them, e.g.

	. mk_version_h $@ $(KERNELRELEASE) $(VERSION) ...

This does not work for all kinds of /bin/sh (it does for bash, that's
why I did not notice).

The fix is easy: Just mark the scripts executable and call instead of
source them.

Unfortunately, patch(1) doesn't understand about propagating chmod.
bk does, so changing the tree isn't hard, and we introduce an explicit
chmod a+x executed during the build for propagating this change into
those trees which get "traditionally" patched up.

Makefile

@@ -295,12 +295,15 @@ include/linux/autoconf.h: .config
 #	this Makefile
 
 include/linux/version.h: Makefile
-	@. scripts/mkversion_h $@ $(KERNELRELEASE) $(VERSION) $(PATCHLEVEL) $(SUBLEVEL)
+	@scripts/mkversion_h $@ $(KERNELRELEASE) $(VERSION) $(PATCHLEVEL) $(SUBLEVEL)
 
 # Helpers built in scripts/
 # ---------------------------------------------------------------------------
 
-scripts/mkdep scripts/split-include : FORCE
+scripts/mkdep scripts/split-include : scripts ;
+
+.PHONY: scripts
+scripts:
 	@$(MAKE) -C scripts
 
 # Generate dependencies

init/Makefile

@@ -22,4 +22,4 @@ $(TOPDIR)/include/linux/compile.h: ../include/linux/compile.h ;
 # actual file if its content has changed.
 
 ../include/linux/compile.h: FORCE
-	@. ../scripts/mkcompile_h $@ "$(ARCH)" "$(CONFIG_SMP)" "$(CC) $(CFLAGS)"
+	@../scripts/mkcompile_h $@ "$(ARCH)" "$(CONFIG_SMP)" "$(CC) $(CFLAGS)"

scripts/Makefile

@@ -2,7 +2,12 @@
 # always needed
 # ---------------------------------------------------------------------------
 
-all: mkdep split-include
+# The following temporary rule will make sure that people's
+# trees get updated to the right permissions, since patch(1)
+# can't do it
+CHMOD_FILES := docgen gen-all-syms kernel-doc mkcompile_h mkversion_h makelst
+
+all: mkdep split-include $(CHMOD_FILES)
 
 mkdep: mkdep.c
 	$(HOSTCC) $(HOSTCFLAGS) -o $@ $<
@@ -10,6 +15,9 @@ mkdep: mkdep.c
 split-include: split-include.c
 	$(HOSTCC) $(HOSTCFLAGS) -o $@ $<
 
+$(CHMOD_FILES): FORCE
+	@chmod a+x $@
+
 # xconfig
 # ---------------------------------------------------------------------------
 
@@ -44,15 +52,11 @@ tkparse.o tkcond.o tkgen.o: %.o: %.c
 # DocBook stuff
 # ---------------------------------------------------------------------------
 
-doc-progs: docproc docgen gen-all-syms kernel-doc
+doc-progs: docproc
 
 docproc: docproc.c
 	$(HOSTCC) $(HOSTCFLAGS) -o $@ $<
 
-docgen gen-all-syms kernel-doc: FORCE
-	chmod 755 $@
-
-
 include $(TOPDIR)/Rules.make
 
 # we don't have automatic deps for host programs