xref: /openbmc/linux/Documentation/Makefile (revision c8dbaa22) 
1# -*- makefile -*-
2# Makefile for Sphinx documentation
3#
4
5subdir-y :=
6
7# You can set these variables from the command line.
8SPHINXBUILD   = sphinx-build
9SPHINXOPTS    =
10SPHINXDIRS    = .
11_SPHINXDIRS   = $(patsubst $(srctree)/Documentation/%/conf.py,%,$(wildcard $(srctree)/Documentation/*/conf.py))
12SPHINX_CONF   = conf.py
13PAPER         =
14BUILDDIR      = $(obj)/output
15PDFLATEX      = xelatex
16LATEXOPTS     = -interaction=batchmode
17
18# User-friendly check for sphinx-build
19HAVE_SPHINX := $(shell if which $(SPHINXBUILD) >/dev/null 2>&1; then echo 1; else echo 0; fi)
20
21ifeq ($(HAVE_SPHINX),0)
22
23.DEFAULT:
24	$(warning The '$(SPHINXBUILD)' command was not found. Make sure you have Sphinx installed and in PATH, or set the SPHINXBUILD make variable to point to the full path of the '$(SPHINXBUILD)' executable.)
25	@echo "  SKIP    Sphinx $@ target."
26
27else # HAVE_SPHINX
28
29# User-friendly check for pdflatex
30HAVE_PDFLATEX := $(shell if which $(PDFLATEX) >/dev/null 2>&1; then echo 1; else echo 0; fi)
31
32# Internal variables.
33PAPEROPT_a4     = -D latex_paper_size=a4
34PAPEROPT_letter = -D latex_paper_size=letter
35KERNELDOC       = $(srctree)/scripts/kernel-doc
36KERNELDOC_CONF  = -D kerneldoc_srctree=$(srctree) -D kerneldoc_bin=$(KERNELDOC)
37ALLSPHINXOPTS   =  $(KERNELDOC_CONF) $(PAPEROPT_$(PAPER)) $(SPHINXOPTS)
38# the i18n builder cannot share the environment and doctrees with the others
39I18NSPHINXOPTS  = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
40
41# commands; the 'cmd' from scripts/Kbuild.include is not *loopable*
42loop_cmd = $(echo-cmd) $(cmd_$(1)) || exit;
43
44# $2 sphinx builder e.g. "html"
45# $3 name of the build subfolder / e.g. "media", used as:
46#    * dest folder relative to $(BUILDDIR) and
47#    * cache folder relative to $(BUILDDIR)/.doctrees
48# $4 dest subfolder e.g. "man" for man pages at media/man
49# $5 reST source folder relative to $(srctree)/$(src),
50#    e.g. "media" for the linux-tv book-set at ./Documentation/media
51
52quiet_cmd_sphinx = SPHINX  $@ --> file://$(abspath $(BUILDDIR)/$3/$4)
53      cmd_sphinx = $(MAKE) BUILDDIR=$(abspath $(BUILDDIR)) $(build)=Documentation/media $2 && \
54	PYTHONDONTWRITEBYTECODE=1 \
55	BUILDDIR=$(abspath $(BUILDDIR)) SPHINX_CONF=$(abspath $(srctree)/$(src)/$5/$(SPHINX_CONF)) \
56	$(SPHINXBUILD) \
57	-b $2 \
58	-c $(abspath $(srctree)/$(src)) \
59	-d $(abspath $(BUILDDIR)/.doctrees/$3) \
60	-D version=$(KERNELVERSION) -D release=$(KERNELRELEASE) \
61	$(ALLSPHINXOPTS) \
62	$(abspath $(srctree)/$(src)/$5) \
63	$(abspath $(BUILDDIR)/$3/$4)
64
65htmldocs:
66	@+$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,html,$(var),,$(var)))
67
68linkcheckdocs:
69	@$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,linkcheck,$(var),,$(var)))
70
71latexdocs:
72	@+$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,latex,$(var),latex,$(var)))
73
74ifeq ($(HAVE_PDFLATEX),0)
75
76pdfdocs:
77	$(warning The '$(PDFLATEX)' command was not found. Make sure you have it installed and in PATH to produce PDF output.)
78	@echo "  SKIP    Sphinx $@ target."
79
80else # HAVE_PDFLATEX
81
82pdfdocs: latexdocs
83	$(foreach var,$(SPHINXDIRS), $(MAKE) PDFLATEX=$(PDFLATEX) LATEXOPTS="$(LATEXOPTS)" -C $(BUILDDIR)/$(var)/latex || exit;)
84
85endif # HAVE_PDFLATEX
86
87epubdocs:
88	@+$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,epub,$(var),epub,$(var)))
89
90xmldocs:
91	@+$(foreach var,$(SPHINXDIRS),$(call loop_cmd,sphinx,xml,$(var),xml,$(var)))
92
93endif # HAVE_SPHINX
94
95# The following targets are independent of HAVE_SPHINX, and the rules should
96# work or silently pass without Sphinx.
97
98# no-ops for the Sphinx toolchain
99sgmldocs:
100	@:
101psdocs:
102	@:
103mandocs:
104	@:
105installmandocs:
106	@:
107
108cleandocs:
109	$(Q)rm -rf $(BUILDDIR)
110	$(Q)$(MAKE) BUILDDIR=$(abspath $(BUILDDIR)) $(build)=Documentation/media clean
111
112dochelp:
113	@echo  ' Linux kernel internal documentation in different formats from ReST:'
114	@echo  '  htmldocs        - HTML'
115	@echo  '  latexdocs       - LaTeX'
116	@echo  '  pdfdocs         - PDF'
117	@echo  '  epubdocs        - EPUB'
118	@echo  '  xmldocs         - XML'
119	@echo  '  linkcheckdocs   - check for broken external links (will connect to external hosts)'
120	@echo  '  cleandocs       - clean all generated files'
121	@echo
122	@echo  '  make SPHINXDIRS="s1 s2" [target] Generate only docs of folder s1, s2'
123	@echo  '  valid values for SPHINXDIRS are: $(_SPHINXDIRS)'
124	@echo
125	@echo  '  make SPHINX_CONF={conf-file} [target] use *additional* sphinx-build'
126	@echo  '  configuration. This is e.g. useful to build with nit-picking config.'
127