doc: sequentialize calls to sphinx-build

In certain conditions the parallel calls to sphinx-build could
collide, yielding a crash like

Exception occurred:
  File "/usr/lib/python3/dist-packages/sphinx/environment.py", line 1261, in get_doctree
    doctree = pickle.load(f)
EOFError: Ran out of input
This commit is contained in:
David Bremner 2019-03-02 23:30:59 -04:00
parent e88297c072
commit dcf7fca2d9

View file

@ -37,6 +37,14 @@ INFO_INFO_FILES := $(INFO_TEXI_FILES:.texi=.info)
%.gz: %
rm -f $@ && gzip --stdout $^ > $@
# Sequentialize the calls to sphinx-build to avoid races with
# reading/writing cached state. This uses GNU make specific
# "order-only" prerequisites.
sphinx-html: | $(DOCBUILDDIR)/.roff.stamp
sphinx-texinfo: | sphinx-html
sphinx-info: | sphinx-texinfo
sphinx-html:
$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) $(DOCBUILDDIR)/html