kbuild: use Linux Kernel build scripts

Now we are ready to switch over to real Kbuild.

This commit disables temporary scripts:
  scripts/{Makefile.build.tmp, Makefile.host.tmp}
and enables real Kbuild scripts:
  scripts/{Makefile.build,Makefile.host,Makefile.lib}.

This switch is triggered by the line in scripts/Kbuild.include
  -build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build.tmp obj
  +build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj

We need to adjust some build scripts for U-Boot.
But smaller amount of modification is preferable.

Additionally, we need to fix compiler flags which are
locally added or removed.

In Kbuild, it is not allowed to change CFLAGS locally.
Instead, ccflags-y, asflags-y, cppflags-y,
CFLAGS_$(basetarget).o, CFLAGS_REMOVE_$(basetarget).o
are prepared for that purpose.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Tested-by: Gerhard Sittig <gsi@denx.de>

1 files changed, 37 insertions, 30 deletions

diff --git a/doc/DocBook/Makefile b/doc/DocBook/Makefile
index aa7c44b..75e59c2 100644
--- a/doc/DocBook/Makefile
+++ b/doc/DocBook/Makefile
@@ -24,9 +24,9 @@ PS_METHOD	= $(prefer-db2x)
 
 ###
 # The targets that may be used.
-PHONY += $(obj).depend xmldocs sgmldocs psdocs pdfdocs htmldocs mandocs installmandocs cleandocs
+PHONY += xmldocs sgmldocs psdocs pdfdocs htmldocs mandocs installmandocs cleandocs
 
-BOOKS := $(addprefix $(OBJTREE)/doc/DocBook/,$(DOCBOOKS))
+BOOKS := $(addprefix $(obj)/,$(DOCBOOKS))
 xmldocs: $(BOOKS)
 sgmldocs: xmldocs
 
@@ -51,10 +51,10 @@ installmandocs: mandocs
 
 ###
 #External programs used
-KERNELDOC = $(SRCTREE)/tools/kernel-doc/kernel-doc
-DOCPROC   = $(OBJTREE)/tools/kernel-doc/docproc
+KERNELDOC = $(srctree)/tools/kernel-doc/kernel-doc
+DOCPROC   = $(objtree)/tools/kernel-doc/docproc
 
-XMLTOFLAGS = -m $(SRCTREE)/doc/DocBook/stylesheet.xsl
+XMLTOFLAGS = -m $(srctree)/doc/DocBook/stylesheet.xsl
 XMLTOFLAGS += --skip-validation
 
 ###
@@ -64,28 +64,36 @@ XMLTOFLAGS += --skip-validation
 #     appropriate parameters.
 # The following rules are used to generate the .xml documentation
 # required to generate the final targets. (ps, pdf, html).
-%.xml: %.tmpl
-	$(DOCPROC) doc $< >$@
-
-ifeq ($@, "cleandocs")
-sinclude $(obj).depend
-$(obj).depend: $(patsubst %.xml, %.tmpl, $(DOCBOOKS))
-	rm -f $(obj).depend ;					\
-	touch $(obj).depend ;					\
-	for file in $^ ; do					\
-		xmlfile=`echo "$${file}" |			\
-			sed "s/tmpl$$/xml/"` ;			\
-		echo -n "$${xmlfile}: ">> $(obj).depend ;	\
-		$(DOCPROC) depend $$file >> $(obj).depend ;	\
-		echo -e "\n\t$(DOCPROC) doc $< >$${xmlfile} " >>	\
-			$(obj).depend ;				\
-	done
+quiet_cmd_docproc = DOCPROC $@
+      cmd_docproc = SRCTREE=$(srctree)/ $(DOCPROC) doc $< >$@
+define rule_docproc
+	set -e;								\
+        $(if $($(quiet)cmd_$(1)),echo '  $($(quiet)cmd_$(1))';) 	\
+        $(cmd_$(1)); 							\
+        ( 								\
+          echo 'cmd_$@ := $(cmd_$(1))'; 				\
+          echo $@: `SRCTREE=$(srctree) $(DOCPROC) depend $<`; 		\
+        ) > $(dir $@).$(notdir $@).cmd
+endef
+
+%.xml: %.tmpl FORCE
+	$(call if_changed_rule,docproc)
+
+###
+#Read in all saved dependency files
+cmd_files := $(wildcard $(foreach f,$(BOOKS),$(dir $(f)).$(notdir $(f)).cmd))
+
+ifneq ($(cmd_files),)
+  include $(cmd_files)
 endif
 
 ###
 # Changes in kernel-doc force a rebuild of all documentation
 $(BOOKS): $(KERNELDOC)
 
+# Tell kbuild to always build the programs
+always := $(hostprogs-y)
+
 notfoundtemplate = echo "*** You have to install docbook-utils or xmlto ***"; \
 		   exit 1
 db2xtemplate = db2TYPE -o $(dir $@) $<
@@ -111,12 +119,12 @@ endif
 quiet_cmd_db2ps = PS      $@
       cmd_db2ps = $(subst TYPE,ps, $($(PS_METHOD)template))
 %.ps : %.xml
-	$(call cmd_db2ps)
+	$(call cmd,db2ps)
 
 quiet_cmd_db2pdf = PDF     $@
       cmd_db2pdf = $(subst TYPE,pdf, $($(PDF_METHOD)template))
 %.pdf : %.xml
-	$(call cmd_db2pdf)
+	$(call cmd,db2pdf)
 
 
 index = index.html
@@ -132,16 +140,16 @@ build_main_index = rm -rf $(main_idx); \
 quiet_cmd_db2html = HTML    $@
       cmd_db2html = xmlto html $(XMLTOFLAGS) -o $(patsubst %.html,%,$@) $< && \
 		echo '<a HREF="$(patsubst %.html,%,$(notdir $@))/index.html"> \
-	$(patsubst %.html,%,$(notdir $@))</a><p>' > $@
+        $(patsubst %.html,%,$(notdir $@))</a><p>' > $@
 
 %.html:	%.xml
 	@(which xmlto > /dev/null 2>&1) || \
 	 (echo "*** You need to install xmlto ***"; \
 	  exit 1)
 	@rm -rf $@ $(patsubst %.html,%,$@)
-	$(call cmd_db2html)
+	$(call cmd,db2html)
 	@if [ ! -z "$(PNG-$(basename $(notdir $@)))" ]; then \
-	    cp $(PNG-$(basename $(notdir $@))) $(patsubst %.html,%,$@); fi
+            cp $(PNG-$(basename $(notdir $@))) $(patsubst %.html,%,$@); fi
 
 quiet_cmd_db2man = MAN     $@
       cmd_db2man = if grep -q refentry $<; then xmlto man $(XMLTOFLAGS) -o $(obj)/man $< ; gzip -f $(obj)/man/*.9; fi
@@ -150,7 +158,7 @@ quiet_cmd_db2man = MAN     $@
 	 (echo "*** You need to install xmlto ***"; \
 	  exit 1)
 	$(Q)mkdir -p $(obj)/man
-	$(call cmd_db2man)
+	$(call cmd,db2man)
 	@touch $@
 
 ###
@@ -162,7 +170,7 @@ quiet_cmd_fig2eps = FIG2EPS $@
 	@(which fig2dev > /dev/null 2>&1) || \
 	 (echo "*** You need to install transfig ***"; \
 	  exit 1)
-	$(call cmd_fig2eps)
+	$(call cmd,fig2eps)
 
 quiet_cmd_fig2png = FIG2PNG $@
       cmd_fig2png = fig2dev -Lpng $< $@
@@ -171,7 +179,7 @@ quiet_cmd_fig2png = FIG2PNG $@
 	@(which fig2dev > /dev/null 2>&1) || \
 	 (echo "*** You need to install transfig ***"; \
 	  exit 1)
-	$(call cmd_fig2png)
+	$(call cmd,fig2png)
 
 ###
 # Rule to convert a .c file to inline XML documentation
@@ -217,7 +225,6 @@ clean-files := $(DOCBOOKS) \
 clean-dirs := $(patsubst %.xml,%,$(DOCBOOKS)) man
 
 cleandocs:
-	@rm -f $(obj).depend
 	@$(Q)rm -f $(call objectify, $(clean-files))
 	@$(Q)rm -rf $(call objectify, $(clean-dirs))