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
9 ifeq ($(IGNORE_DOCBOOKS),)
11 DOCBOOKS := z8530book.xml device-drivers.xml \
12 kernel-hacking.xml kernel-locking.xml deviceiobook.xml \
13 writing_usb_driver.xml networking.xml \
14 kernel-api.xml filesystems.xml lsm.xml usb.xml kgdb.xml \
15 gadget.xml libata.xml mtdnand.xml librs.xml rapidio.xml \
16 genericirq.xml s390-drivers.xml uio-howto.xml scsi.xml \
17 80211.xml debugobjects.xml sh.xml regulator.xml \
18 alsa-driver-api.xml writing-an-alsa-driver.xml \
19 tracepoint.xml w1.xml \
20 writing_musb_glue_layer.xml crypto-API.xml iio.xml
23 # The build process is as follows (targets):
24 # (xmldocs) [by docproc]
25 # file.tmpl --> file.xml +--> file.ps (psdocs) [by db2ps or xmlto]
26 # +--> file.pdf (pdfdocs) [by db2pdf or xmlto]
27 # +--> DIR=file (htmldocs) [by xmlto]
28 # +--> man/ (mandocs) [by xmlto]
31 # for PDF and PS output you can choose between xmlto and docbook-utils tools
32 PDF_METHOD = $(prefer-db2x)
33 PS_METHOD = $(prefer-db2x)
36 targets += $(DOCBOOKS)
37 BOOKS := $(addprefix $(obj)/,$(DOCBOOKS))
41 PS := $(patsubst %.xml, %.ps, $(BOOKS))
44 PDF := $(patsubst %.xml, %.pdf, $(BOOKS))
47 HTML := $(sort $(patsubst %.xml, %.html, $(BOOKS)))
49 $(call cmd,build_main_index)
51 MAN := $(patsubst %.xml, %.9, $(BOOKS))
53 find $(obj)/man -name '*.9' | xargs gzip -nf
55 installmandocs: mandocs
56 mkdir -p /usr/local/man/man9/
57 find $(obj)/man -name '*.9.gz' -printf '%h %f\n' | \
58 sort -k 2 -k 1 | uniq -f 1 | sed -e 's: :/:' | \
59 xargs install -m 644 -t /usr/local/man/man9/
61 # no-op for the DocBook toolchain
65 #External programs used
66 KERNELDOCXMLREF = $(srctree)/scripts/kernel-doc-xml-ref
67 KERNELDOC = $(srctree)/scripts/kernel-doc
68 DOCPROC = $(objtree)/scripts/docproc
69 CHECK_LC_CTYPE = $(objtree)/scripts/check-lc_ctype
71 # Use a fixed encoding - UTF-8 if the C library has support built-in
73 LC_CTYPE := $(call try-run, LC_CTYPE=C.UTF-8 $(CHECK_LC_CTYPE),C.UTF-8,C)
76 XMLTOFLAGS = -m $(srctree)/$(src)/stylesheet.xsl
77 XMLTOFLAGS += --skip-validation
80 # DOCPROC is used for two purposes:
81 # 1) To generate a dependency list for a .tmpl file
82 # 2) To preprocess a .tmpl file and call kernel-doc with
83 # appropriate parameters.
84 # The following rules are used to generate the .xml documentation
85 # required to generate the final targets. (ps, pdf, html).
86 quiet_cmd_docproc = DOCPROC $@
87 cmd_docproc = SRCTREE=$(srctree)/ $(DOCPROC) doc $< >$@
90 $(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))';) \
93 echo 'cmd_$@ := $(cmd_$(1))'; \
94 echo $@: `SRCTREE=$(srctree) $(DOCPROC) depend $<`; \
95 ) > $(dir $@).$(notdir $@).cmd
98 %.xml: %.tmpl $(KERNELDOC) $(DOCPROC) $(KERNELDOCXMLREF) FORCE
99 $(call if_changed_rule,docproc)
101 # Tell kbuild to always build the programs
102 always := $(hostprogs-y)
104 notfoundtemplate = echo "*** You have to install docbook-utils or xmlto ***"; \
106 db2xtemplate = db2TYPE -o $(dir $@) $<
107 xmltotemplate = xmlto TYPE $(XMLTOFLAGS) -o $(dir $@) $<
109 # determine which methods are available
110 ifeq ($(shell which db2ps >/dev/null 2>&1 && echo found),found)
115 prefer-db2x = $(use-xmlto)
117 ifeq ($(shell which xmlto >/dev/null 2>&1 && echo found),found)
122 prefer-xmlto = $(use-db2x)
125 # the commands, generated from the chosen template
126 quiet_cmd_db2ps = PS $@
127 cmd_db2ps = $(subst TYPE,ps, $($(PS_METHOD)template))
131 quiet_cmd_db2pdf = PDF $@
132 cmd_db2pdf = $(subst TYPE,pdf, $($(PDF_METHOD)template))
138 main_idx = $(obj)/$(index)
139 quiet_cmd_build_main_index = HTML $(main_idx)
140 cmd_build_main_index = rm -rf $(main_idx); \
141 echo '<h1>Linux Kernel HTML Documentation</h1>' >> $(main_idx) && \
142 echo '<h2>Kernel Version: $(KERNELVERSION)</h2>' >> $(main_idx) && \
143 cat $(HTML) >> $(main_idx)
145 quiet_cmd_db2html = HTML $@
146 cmd_db2html = xmlto html $(XMLTOFLAGS) -o $(patsubst %.html,%,$@) $< && \
147 echo '<a HREF="$(patsubst %.html,%,$(notdir $@))/index.html"> \
148 $(patsubst %.html,%,$(notdir $@))</a><p>' > $@
151 # Rules to create an aux XML and .db, and use them to re-process the DocBook XML
152 # to fill internal hyperlinks
154 quiet_gen_aux_xml = echo ' XMLREF $@'
155 silent_gen_aux_xml = :
157 @$($(quiet)gen_aux_xml)
159 @(cat $< | egrep "^<refentry id" | egrep -o "\".*\"" | cut -f 2 -d \" > $<.db)
160 @$(KERNELDOCXMLREF) -db $<.db $< > $@
164 @(which xmlto > /dev/null 2>&1) || \
165 (echo "*** You need to install xmlto ***"; \
167 @rm -rf $@ $(patsubst %.html,%,$@)
169 @if [ ! -z "$(PNG-$(basename $(notdir $@)))" ]; then \
170 cp $(PNG-$(basename $(notdir $@))) $(patsubst %.html,%,$@); fi
172 quiet_cmd_db2man = MAN $@
173 cmd_db2man = if grep -q refentry $<; then xmlto man $(XMLTOFLAGS) -o $(obj)/man/$(*F) $< ; fi
175 @(which xmlto > /dev/null 2>&1) || \
176 (echo "*** You need to install xmlto ***"; \
178 $(Q)mkdir -p $(obj)/man/$(*F)
183 # Rules to generate postscripts and PNG images from .fig format files
184 quiet_cmd_fig2eps = FIG2EPS $@
185 cmd_fig2eps = fig2dev -Leps $< $@
188 @(which fig2dev > /dev/null 2>&1) || \
189 (echo "*** You need to install transfig ***"; \
193 quiet_cmd_fig2png = FIG2PNG $@
194 cmd_fig2png = fig2dev -Lpng $< $@
197 @(which fig2dev > /dev/null 2>&1) || \
198 (echo "*** You need to install transfig ***"; \
203 # Rule to convert a .c file to inline XML documentation
205 quiet_gen_xml = echo ' GEN $@'
210 echo "<programlisting>"; \
211 expand --tabs=8 < $< | \
212 sed -e "s/&/\\&/g" \
215 echo "</programlisting>") > $@
225 endif # IGNORE_DOCBOOKS
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'
238 @echo ' cleandocs - clean all generated DocBook files'
240 @echo ' make DOCBOOKS="s1.xml s2.xml" [target] Generate only docs s1.xml s2.xml'
241 @echo ' valid values for DOCBOOKS are: $(DOCBOOKS)'
243 @echo " make IGNORE_DOCBOOKS=1 [target] Don't generate docs from Docbook"
244 @echo ' This is useful to generate only the ReST docs (Sphinx)'
248 # Temporary files left by various tools
249 clean-files := $(DOCBOOKS) \
250 $(patsubst %.xml, %.dvi, $(DOCBOOKS)) \
251 $(patsubst %.xml, %.aux, $(DOCBOOKS)) \
252 $(patsubst %.xml, %.tex, $(DOCBOOKS)) \
253 $(patsubst %.xml, %.log, $(DOCBOOKS)) \
254 $(patsubst %.xml, %.out, $(DOCBOOKS)) \
255 $(patsubst %.xml, %.ps, $(DOCBOOKS)) \
256 $(patsubst %.xml, %.pdf, $(DOCBOOKS)) \
257 $(patsubst %.xml, %.html, $(DOCBOOKS)) \
258 $(patsubst %.xml, %.9, $(DOCBOOKS)) \
259 $(patsubst %.xml, %.aux.xml, $(DOCBOOKS)) \
260 $(patsubst %.xml, %.xml.db, $(DOCBOOKS)) \
261 $(patsubst %.xml, %.xml, $(DOCBOOKS)) \
264 clean-dirs := $(patsubst %.xml,%,$(DOCBOOKS)) man
267 $(Q)rm -f $(call objectify, $(clean-files))
268 $(Q)rm -rf $(call objectify, $(clean-dirs))
270 # Declare the contents of the .PHONY variable as phony. We keep that
271 # information in a variable se we can use it in if_changed and friends.