Actually the '-R' flag isn't necessary.

diff --git a/doc/Makefile b/doc/Makefile
index 518d3c9c3dc5897e300d2ecead2100a5e1c82886..eb9d8254196ada44f856f9d4bd0383442c318c96 100644 (file)
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -38,7 +38,7 @@ ifdef GH_TOKEN
        git --work-tree=$(GH_PAGES) --git-dir=$(GH_PAGES)/.git config user.email "ol.sc@web.de"
        $(RM) -r $(GH_PAGES)/doc
        mkdir $(GH_PAGES)/doc
-       cp -R ../html/* $(GH_PAGES)/doc
+       cp ../html/* $(GH_PAGES)/doc
        git --work-tree=$(GH_PAGES) --git-dir=$(GH_PAGES)/.git add -A doc
        -git --work-tree=$(GH_PAGES) --git-dir=$(GH_PAGES)/.git commit -m "Updated doc from commit $(TRAVIS_COMMIT)."
        git --work-tree=$(GH_PAGES) --git-dir=$(GH_PAGES)/.git push