Commit cf08508d authored May 29, 2019 by Mauro Carvalho Chehab Committed by Jonathan Corbet May 30, 2019

docs: by default, build docs a lot faster with Sphinx >= 1.7



Since Sphinx version 1.7, it is possible to use "-jauto" in
order to speedup documentation builds. On older versions,
while -j was already supported, one would need to set the
number of threads manually.

So, if SPHINXOPTS is not provided, add -jauto, in order to
speed up the build. That makes it *a lot* times faster than
without -j.

If one really wants to slow things down, it can just use:

	make SPHINXOPTS=-j1 htmldocs

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
[ jc: fixed perl magic to determine sphinx version ]
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

parent 0ca862e6

Documentation/Makefile

+2 −0

Original line number	Diff line number	Diff line
		@@ -28,6 +28,8 @@ ifeq ($(HAVE_SPHINX),0)

		else # HAVE_SPHINX

		export SPHINXOPTS = $(shell perl -e 'open IN,"sphinx-build --version 2>&1 \|"; while (<IN>) { if (m/([\d\.]+)/) { print "-jauto" if ($$1 >= "1.7") } ;} close IN')

		# User-friendly check for pdflatex and latexmk
		HAVE_PDFLATEX := $(shell if which $(PDFLATEX) >/dev/null 2>&1; then echo 1; else echo 0; fi)
		HAVE_LATEXMK := $(shell if which latexmk >/dev/null 2>&1; then echo 1; else echo 0; fi)

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