kernel-doc: move kernel-doc tools to scripts/

tools/kernel-doc/docproc.c and tools/kernel-doc/kernel-doc are
files imported from Linux Kernel.

They originally resided under scripts/ directory in Linux Kernel.

This commit moves them to the original location.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>

Makefile

@@ -1149,9 +1149,6 @@ $(TIMESTAMP_FILE):
 env: depend scripts_basic
 	$(Q)$(MAKE) $(build)=tools/$@
 
-xmldocs pdfdocs psdocs htmldocs mandocs: tools/kernel-doc/docproc
-	$(Q)$(MAKE) U_BOOT_VERSION=$(U_BOOT_VERSION) $(build)=doc/DocBook $@
-
 tools-all: HOST_TOOLS_ALL=y
 tools-all: env tools ;
 
@@ -1259,6 +1256,13 @@ backup:
 	F=`basename $(TOPDIR)` ; cd .. ; \
 	gtar --force-local -zcvf `LC_ALL=C date "+$$F-%Y-%m-%d-%T.tar.gz"` $$F
 
+
+# Documentation targets
+# ---------------------------------------------------------------------------
+%docs: scripts_basic FORCE
+	$(Q)$(MAKE) $(build)=scripts build_docproc
+	$(Q)$(MAKE) $(build)=doc/DocBook $@
+
 # Dummies...
 PHONY += prepare scripts
 prepare: ;

doc/DocBook/Makefile

@@ -1,7 +1,7 @@
 ###
 # This makefile is used to generate the kernel documentation,
 # primarily based on in-line comments in various source files.
-# See doc/kernel-doc-nano-HOWTO.txt for instruction in how
+# See Documentation/kernel-doc-nano-HOWTO.txt for instruction in how
 # to document the SRC - and how to read it.
 # To add a new book the only step required is to add the book to the
 # list of DOCBOOKS.
@@ -51,8 +51,8 @@ installmandocs: mandocs
 
 ###
 #External programs used
-KERNELDOC = $(srctree)/tools/kernel-doc/kernel-doc
-DOCPROC   = $(objtree)/tools/kernel-doc/docproc
+KERNELDOC = $(srctree)/scripts/kernel-doc
+DOCPROC   = $(objtree)/scripts/docproc
 
 XMLTOFLAGS = -m $(srctree)/doc/DocBook/stylesheet.xsl
 XMLTOFLAGS += --skip-validation
@@ -134,11 +134,8 @@ build_main_index = rm -rf $(main_idx); \
 		   echo '<h2>U-Boot Version: $(U_BOOT_VERSION)</h2>' >> $(main_idx) && \
 		   cat $(HTML) >> $(main_idx)
 
-# To work around bug [1] in docbook-xsl-stylesheets 1.76.1 , generate only html
-# docs instead of xhtml with xmlto.
-# [1] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=654338
 quiet_cmd_db2html = HTML    $@
-      cmd_db2html = xmlto html $(XMLTOFLAGS) -o $(patsubst %.html,%,$@) $< && \
+      cmd_db2html = xmlto xhtml $(XMLTOFLAGS) -o $(patsubst %.html,%,$@) $< && \
 		echo '<a HREF="$(patsubst %.html,%,$(notdir $@))/index.html"> \
         $(patsubst %.html,%,$(notdir $@))</a><p>' > $@
 
@@ -225,8 +222,8 @@ clean-files := $(DOCBOOKS) \
 clean-dirs := $(patsubst %.xml,%,$(DOCBOOKS)) man
 
 cleandocs:
-	@$(Q)rm -f $(call objectify, $(clean-files))
-	@$(Q)rm -rf $(call objectify, $(clean-dirs))
+	$(Q)rm -f $(call objectify, $(clean-files))
+	$(Q)rm -rf $(call objectify, $(clean-dirs))
 
 # Declare the contents of the .PHONY variable as phony.  We keep that
 # information in a variable se we can use it in if_changed and friends.

scripts/.gitignore

@@ -0,0 +1,4 @@
+#
+# Generated files
+#
+docproc

scripts/Makefile

@@ -1,2 +1,16 @@
+###
+# scripts contains sources for various helper programs used throughout
+# the kernel for the build process.
+# ---------------------------------------------------------------------------
+# docproc:       Used in Documentation/DocBook
+
+# The following hostprogs-y programs are only build on demand
+hostprogs-y += docproc
+
+# These targets are used internally to avoid "is up to date" messages
+PHONY += build_docproc
+build_docproc: scripts/docproc
+	@:
+
 # Let clean descend into subdirs
 subdir-	+= basic

scripts/docproc.c

@@ -65,7 +65,7 @@ FILELINE * docsection;
 
 #define MAXLINESZ     2048
 #define MAXFILES      250
-#define KERNELDOCPATH "tools/kernel-doc/"
+#define KERNELDOCPATH "scripts/"
 #define KERNELDOC     "kernel-doc"
 #define DOCBOOK       "-docbook"
 #define LIST          "-list"

tools/.gitignore

@@ -18,4 +18,3 @@
 /easylogo/easylogo
 /gdb/gdbcont
 /gdb/gdbsend
-/kernel-doc/docproc

tools/Makefile

@@ -183,8 +183,6 @@ HOST_EXTRACFLAGS += -include $(SRCTREE)/include/libfdt_env.h \
 
 __build:	$(LOGO-y)
 
-subdir-y += kernel-doc
-
 $(LOGO_H):	$(obj)/bmp_logo $(LOGO_BMP)
 	$(obj)/bmp_logo --gen-info $(LOGO_BMP) > $@
 

tools/kernel-doc/Makefile

@@ -1,10 +0,0 @@
-#
-# Copyright (C) 2012 Marek Vasut <marex@denx.de>
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
-
-hostprogs-y := docproc
-always := $(hostprogs-y)
-
-HOST_EXTRACFLAGS := -pedantic