From: Rémy Léone <remy.le...@gmail.com>

Documentation shouldn't have broken links.
sphinx linkcheck builder scans all documents for external links, tries
to open them with urllib2, and writes an overview which ones are broken
and redirected to standard output and to output.txt in the output
directory.

Signed-off-by: Rémy Léone <remy.le...@gmail.com>
---
Changes in v2:

- Add a more descriptive commit message
- Add message to make help output about connection to external host
- Add no-op for:
    - Documentation/DocBook/Makefile
    - Documentation/media/Makefile
- Remove sphinx.builders.linkcheck include
- Change from linkcheck to linkcheckdocs

 Documentation/DocBook/Makefile | 1 +
 Documentation/Makefile.sphinx  | 4 ++++
 Documentation/media/Makefile   | 1 +
 Makefile                       | 2 +-
 4 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/Documentation/DocBook/Makefile b/Documentation/DocBook/Makefile
index a6eb7dc..035a6dd 100644
--- a/Documentation/DocBook/Makefile
+++ b/Documentation/DocBook/Makefile
@@ -71,6 +71,7 @@ installmandocs: mandocs
 # no-op for the DocBook toolchain
 epubdocs:
 latexdocs:
+linkcheckdocs:
 
 ###
 #External programs used
diff --git a/Documentation/Makefile.sphinx b/Documentation/Makefile.sphinx
index 707c653..c320458 100644
--- a/Documentation/Makefile.sphinx
+++ b/Documentation/Makefile.sphinx
@@ -68,6 +68,9 @@ quiet_cmd_sphinx = SPHINX  $@ --> file://$(abspath 
$(BUILDDIR)/$3/$4)
 htmldocs:
        @$(foreach var,$(SPHINXDIRS),$(call 
loop_cmd,sphinx,html,$(var),,$(var)))
 
+linkcheckdocs:
+       @$(foreach var,$(SPHINXDIRS),$(call 
loop_cmd,sphinx,linkcheck,$(var),,$(var)))
+
 latexdocs:
        @$(foreach var,$(SPHINXDIRS),$(call 
loop_cmd,sphinx,latex,$(var),latex,$(var)))
 
@@ -109,6 +112,7 @@ dochelp:
        @echo  '  pdfdocs         - PDF'
        @echo  '  epubdocs        - EPUB'
        @echo  '  xmldocs         - XML'
+       @echo  '  linkcheckdocs   - check for broken external links (will 
connect to external hosts)'
        @echo  '  cleandocs       - clean all generated files'
        @echo
        @echo  '  make SPHINXDIRS="s1 s2" [target] Generate only docs of folder 
s1, s2'
diff --git a/Documentation/media/Makefile b/Documentation/media/Makefile
index 3266360..d576ef1 100644
--- a/Documentation/media/Makefile
+++ b/Documentation/media/Makefile
@@ -103,6 +103,7 @@ html: all
 epub: all
 xml: all
 latex: $(IMGPDF) all
+linkcheckdocs:
 
 clean:
        -rm -f $(DOTTGT) $(IMGTGT) ${TARGETS} 2>/dev/null
diff --git a/Makefile b/Makefile
index 96e2352..416849c0 100644
--- a/Makefile
+++ b/Makefile
@@ -1444,7 +1444,7 @@ $(help-board-dirs): help-%:
 
 # Documentation targets
 # ---------------------------------------------------------------------------
-DOC_TARGETS := xmldocs sgmldocs psdocs latexdocs pdfdocs htmldocs mandocs 
installmandocs epubdocs cleandocs
+DOC_TARGETS := xmldocs sgmldocs psdocs latexdocs pdfdocs htmldocs mandocs 
installmandocs epubdocs cleandocs linkcheckdocs
 PHONY += $(DOC_TARGETS)
 $(DOC_TARGETS): scripts_basic FORCE
        $(Q)$(MAKE) $(build)=scripts build_docproc build_check-lc_ctype
-- 
2.7.4

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