linux-kernel - [PATCH v2] kbuild: add a rule to just create one file for kernel doc

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Date:	Sun, 8 Jul 2012 19:34:55 +0200
From:	Sebastian Andrzej Siewior <sebastian@...akpoint.cc>
To:	Michal Marek <mmarek@...e.cz>
Cc:	linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
	Richard Weinberger <richard@....at>
Subject: [PATCH v2] kbuild: add a rule to just create one file for kernel doc

If you are chaning the file and you want to verify that it looks good it
is helpfull to just re-run for the single file instead of running the
complete htmldocs target.

With this patch one can run
|	make drivers/mtd/ubi/wl.html
and create the output just for this file.

Cc: Richard Weinberger <richard@....at>
Signed-off-by: Sebastian Andrzej Siewior <sebastian@...akpoint.cc>
---
v1..v2:
	- rules moved to Documentation/DocBook/Makefile instead
	  scripts/Makefile.build
	- added html to clean target

 Documentation/DocBook/Makefile |    8 ++++++++
 Makefile                       |    6 +++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/Documentation/DocBook/Makefile b/Documentation/DocBook/Makefile
index bc3d9f8..423adad 100644
--- a/Documentation/DocBook/Makefile
+++ b/Documentation/DocBook/Makefile
@@ -204,6 +204,14 @@ silent_gen_xml = :
 	   echo "</programlisting>")  > $@
 
 ###
+# or HTML documentation
+quiet_cmd_doc_html_c	= HTML $@
+cmd_doc_html_c		= $(KERNELDOC) -html $< > $@
+
+%.html: %.c
+	$(call if_changed,doc_html_c)
+
+###
 # Help targets as used by the top-level makefile
 dochelp:
 	@echo  ' Linux kernel internal documentation in different formats:'
diff --git a/Makefile b/Makefile
index bf02707..96ac5d6 100644
--- a/Makefile
+++ b/Makefile
@@ -1079,6 +1079,7 @@ help:
 	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
 	@echo  '                    (requires a recent binutils and recent build (System.map))'
 	@echo  '  dir/file.ko     - Build module including final link'
+	@echo  '  dir/file.html   - Build kernel HTML-doc only for this file'
 	@echo  '  modules_prepare - Set up for building external modules'
 	@echo  '  tags/TAGS	  - Generate tags file for editors'
 	@echo  '  cscope	  - Generate cscope index'
@@ -1154,6 +1155,9 @@ $(help-board-dirs): help-%:
 	$(Q)$(MAKE) $(build)=scripts build_docproc
 	$(Q)$(MAKE) $(build)=Documentation/DocBook $@
 
+%.html: %.c FORCE
+	$(Q)$(MAKE) $(build)=Documentation/DocBook $(target-dir)$(notdir $@)
+
 else # KBUILD_EXTMOD
 
 ###
@@ -1240,7 +1244,7 @@ clean: $(clean-dirs)
 	@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
 		\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
 		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
-		-o -name '*.symtypes' -o -name 'modules.order' \
+		-o -name '*.symtypes' -o -name 'modules.order' -o -name *.html \
 		-o -name modules.builtin -o -name '.tmp_*.o.*' \
 		-o -name '*.gcno' \) -type f -print | xargs rm -f
 
-- 
1.7.10.4

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