2 # This makefile is used to generate the kernel documentation,
3 # primarily based on in-line comments in various source files.
4 # See Documentation/kernel-doc-nano-HOWTO.txt for instruction in how
5 # to document the SRC - and how to read it.
6 # To add a new book the only step required is to add the book to the
13 # Skip DocBook build if the user explicitly requested no DOCBOOKS.
15 @echo " SKIP DocBook $@ target (DOCBOOKS=\"\" specified)."
17 ifneq ($(SPHINXDIRS),)
19 # Skip DocBook build if the user explicitly requested a sphinx dir
21 @echo " SKIP DocBook $@ target (SPHINXDIRS specified)."
26 # The build process is as follows (targets):
27 # (xmldocs) [by docproc]
28 # file.tmpl --> file.xml +--> file.ps (psdocs) [by db2ps or xmlto]
29 # +--> file.pdf (pdfdocs) [by db2pdf or xmlto]
30 # +--> DIR=file (htmldocs) [by xmlto]
31 # +--> man/ (mandocs) [by xmlto]
34 # for PDF and PS output you can choose between xmlto and docbook-utils tools
35 PDF_METHOD = $(prefer-db2x)
36 PS_METHOD = $(prefer-db2x)
39 targets += $(DOCBOOKS)
40 BOOKS := $(addprefix $(obj)/,$(DOCBOOKS))
44 PS := $(patsubst %.xml, %.ps, $(BOOKS))
47 PDF := $(patsubst %.xml, %.pdf, $(BOOKS))
50 HTML := $(sort $(patsubst %.xml, %.html, $(BOOKS)))
52 $(call cmd,build_main_index)
54 MAN := $(patsubst %.xml, %.9, $(BOOKS))
56 find $(obj)/man -name '*.9' | xargs gzip -nf
58 # Default location for installed man pages
59 export INSTALL_MAN_PATH = $(objtree)/usr
61 installmandocs: mandocs
62 mkdir -p $(INSTALL_MAN_PATH)/man/man9/
63 find $(obj)/man -name '*.9.gz' -printf '%h %f\n' | \
64 sort -k 2 -k 1 | uniq -f 1 | sed -e 's: :/:' | \
65 xargs install -m 644 -t $(INSTALL_MAN_PATH)/man/man9/
67 # no-op for the DocBook toolchain
73 #External programs used
74 KERNELDOCXMLREF = $(srctree)/scripts/kernel-doc-xml-ref
75 KERNELDOC = $(srctree)/scripts/kernel-doc
76 DOCPROC = $(objtree)/scripts/docproc
77 CHECK_LC_CTYPE = $(objtree)/scripts/check-lc_ctype
79 # Use a fixed encoding - UTF-8 if the C library has support built-in
81 LC_CTYPE := $(call try-run, LC_CTYPE=C.UTF-8 $(CHECK_LC_CTYPE),C.UTF-8,C)
84 XMLTOFLAGS = -m $(srctree)/$(src)/stylesheet.xsl
85 XMLTOFLAGS += --skip-validation
88 # DOCPROC is used for two purposes:
89 # 1) To generate a dependency list for a .tmpl file
90 # 2) To preprocess a .tmpl file and call kernel-doc with
91 # appropriate parameters.
92 # The following rules are used to generate the .xml documentation
93 # required to generate the final targets. (ps, pdf, html).
94 quiet_cmd_docproc = DOCPROC $@
95 cmd_docproc = SRCTREE=$(srctree)/ $(DOCPROC) doc $< >$@
98 $(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))';) \
101 echo 'cmd_$@ := $(cmd_$(1))'; \
102 echo $@: `SRCTREE=$(srctree) $(DOCPROC) depend $<`; \
103 ) > $(dir $@).$(notdir $@).cmd
106 %.xml: %.tmpl $(KERNELDOC) $(DOCPROC) $(KERNELDOCXMLREF) FORCE
107 $(call if_changed_rule,docproc)
109 # Tell kbuild to always build the programs
110 always := $(hostprogs-y)
112 notfoundtemplate = echo "*** You have to install docbook-utils or xmlto ***"; \
114 db2xtemplate = db2TYPE -o $(dir $@) $<
115 xmltotemplate = xmlto TYPE $(XMLTOFLAGS) -o $(dir $@) $<
117 # determine which methods are available
118 ifeq ($(shell which db2ps >/dev/null 2>&1 && echo found),found)
123 prefer-db2x = $(use-xmlto)
125 ifeq ($(shell which xmlto >/dev/null 2>&1 && echo found),found)
130 prefer-xmlto = $(use-db2x)
133 # the commands, generated from the chosen template
134 quiet_cmd_db2ps = PS $@
135 cmd_db2ps = $(subst TYPE,ps, $($(PS_METHOD)template))
139 quiet_cmd_db2pdf = PDF $@
140 cmd_db2pdf = $(subst TYPE,pdf, $($(PDF_METHOD)template))
146 main_idx = $(obj)/$(index)
147 quiet_cmd_build_main_index = HTML $(main_idx)
148 cmd_build_main_index = rm -rf $(main_idx); \
149 echo '<h1>Linux Kernel HTML Documentation</h1>' >> $(main_idx) && \
150 echo '<h2>Kernel Version: $(KERNELVERSION)</h2>' >> $(main_idx) && \
151 cat $(HTML) >> $(main_idx)
153 quiet_cmd_db2html = HTML $@
154 cmd_db2html = xmlto html $(XMLTOFLAGS) -o $(patsubst %.html,%,$@) $< && \
155 echo '<a HREF="$(patsubst %.html,%,$(notdir $@))/index.html"> \
156 $(patsubst %.html,%,$(notdir $@))</a><p>' > $@
159 # Rules to create an aux XML and .db, and use them to re-process the DocBook XML
160 # to fill internal hyperlinks
162 quiet_gen_aux_xml = echo ' XMLREF $@'
163 silent_gen_aux_xml = :
165 @$($(quiet)gen_aux_xml)
167 @(cat $< | egrep "^<refentry id" | egrep -o "\".*\"" | cut -f 2 -d \" > $<.db)
168 @$(KERNELDOCXMLREF) -db $<.db $< > $@
172 @(which xmlto > /dev/null 2>&1) || \
173 (echo "*** You need to install xmlto ***"; \
175 @rm -rf $@ $(patsubst %.html,%,$@)
177 @if [ ! -z "$(PNG-$(basename $(notdir $@)))" ]; then \
178 cp $(PNG-$(basename $(notdir $@))) $(patsubst %.html,%,$@); fi
180 quiet_cmd_db2man = MAN $@
181 cmd_db2man = if grep -q refentry $<; then xmlto man $(XMLTOFLAGS) -o $(obj)/man/$(*F) $< ; fi
183 @(which xmlto > /dev/null 2>&1) || \
184 (echo "*** You need to install xmlto ***"; \
186 $(Q)mkdir -p $(obj)/man/$(*F)
191 # Rules to generate postscripts and PNG images from .fig format files
192 quiet_cmd_fig2eps = FIG2EPS $@
193 cmd_fig2eps = fig2dev -Leps $< $@
196 @(which fig2dev > /dev/null 2>&1) || \
197 (echo "*** You need to install transfig ***"; \
201 quiet_cmd_fig2png = FIG2PNG $@
202 cmd_fig2png = fig2dev -Lpng $< $@
205 @(which fig2dev > /dev/null 2>&1) || \
206 (echo "*** You need to install transfig ***"; \
211 # Rule to convert a .c file to inline XML documentation
213 quiet_gen_xml = echo ' GEN $@'
218 echo "<programlisting>"; \
219 expand --tabs=8 < $< | \
220 sed -e "s/&/\\&/g" \
223 echo "</programlisting>") > $@
229 # Help targets as used by the top-level makefile
231 @echo ' Linux kernel internal documentation in different formats (DocBook):'
232 @echo ' htmldocs - HTML'
233 @echo ' pdfdocs - PDF'
234 @echo ' psdocs - Postscript'
235 @echo ' xmldocs - XML DocBook'
236 @echo ' mandocs - man pages'
237 @echo ' installmandocs - install man pages generated by mandocs to INSTALL_MAN_PATH'; \
238 echo ' (default: $(INSTALL_MAN_PATH))'; \
240 @echo ' cleandocs - clean all generated DocBook files'
242 @echo ' make DOCBOOKS="s1.xml s2.xml" [target] Generate only docs s1.xml s2.xml'
243 @echo ' valid values for DOCBOOKS are: $(DOCBOOKS)'
245 @echo " make DOCBOOKS=\"\" [target] Don't generate docs from Docbook"
246 @echo ' This is useful to generate only the ReST docs (Sphinx)'
250 # Temporary files left by various tools
251 clean-files := $(DOCBOOKS) \
252 $(patsubst %.xml, %.dvi, $(DOCBOOKS)) \
253 $(patsubst %.xml, %.aux, $(DOCBOOKS)) \
254 $(patsubst %.xml, %.tex, $(DOCBOOKS)) \
255 $(patsubst %.xml, %.log, $(DOCBOOKS)) \
256 $(patsubst %.xml, %.out, $(DOCBOOKS)) \
257 $(patsubst %.xml, %.ps, $(DOCBOOKS)) \
258 $(patsubst %.xml, %.pdf, $(DOCBOOKS)) \
259 $(patsubst %.xml, %.html, $(DOCBOOKS)) \
260 $(patsubst %.xml, %.9, $(DOCBOOKS)) \
261 $(patsubst %.xml, %.aux.xml, $(DOCBOOKS)) \
262 $(patsubst %.xml, %.xml.db, $(DOCBOOKS)) \
263 $(patsubst %.xml, %.xml, $(DOCBOOKS)) \
264 $(patsubst %.xml, .%.xml.cmd, $(DOCBOOKS)) \
267 clean-dirs := $(patsubst %.xml,%,$(DOCBOOKS)) man
270 $(Q)rm -f $(call objectify, $(clean-files))
271 $(Q)rm -rf $(call objectify, $(clean-dirs))
273 # Declare the contents of the .PHONY variable as phony. We keep that
274 # information in a variable so we can use it in if_changed and friends.