[docs] Add a note to docs/README.txt
Added note to docs/README.txt on how to check the reachibility of
external links in the documentation.
Patch by Dan Liew!
llvm-svn: 206924
GitOrigin-RevId: 3feb690f76dec261ae79fc09b3603522e91e6ed6
diff --git a/docs/README.txt b/docs/README.txt
index 22cf930..3d63429 100644
--- a/docs/README.txt
+++ b/docs/README.txt
@@ -40,3 +40,12 @@
These .rst files are also included during HTML generation so they are also
viewable online (as noted above) at e.g.
`http://llvm.org/docs/CommandGuide/Foo.html`.
+
+Checking links
+==============
+
+The reachibility of external links in the documentation can be checked by
+running:
+
+ cd docs/
+ make -f Makefile.sphinx linkcheck
