Documentation/DocBook/Makefile

   1 ###
   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
   7 # list of DOCBOOKS.
   8
   9 DOCBOOKS := z8530book.xml mcabook.xml device-drivers.xml \
  10             kernel-hacking.xml kernel-locking.xml deviceiobook.xml \
  11             writing_usb_driver.xml networking.xml \
  12             kernel-api.xml filesystems.xml lsm.xml usb.xml kgdb.xml \
  13             gadget.xml libata.xml mtdnand.xml librs.xml rapidio.xml \
  14             genericirq.xml s390-drivers.xml uio-howto.xml scsi.xml \
  15             80211.xml debugobjects.xml sh.xml regulator.xml \
  16             alsa-driver-api.xml writing-an-alsa-driver.xml \
  17             tracepoint.xml media.xml drm.xml
  18
  19 ###
  20 # The build process is as follows (targets):
  21 #              (xmldocs) [by docproc]
  22 # file.tmpl --> file.xml +--> file.ps   (psdocs)   [by db2ps or xmlto]
  23 #                        +--> file.pdf  (pdfdocs)  [by db2pdf or xmlto]
  24 #                        +--> DIR=file  (htmldocs) [by xmlto]
  25 #                        +--> man/      (mandocs)  [by xmlto]
  26
  27
  28 # for PDF and PS output you can choose between xmlto and docbook-utils tools
  29 PDF_METHOD      = $(prefer-db2x)
  30 PS_METHOD       = $(prefer-db2x)
  31
  32
  33 ###
  34 # The targets that may be used.
  35 PHONY += xmldocs sgmldocs psdocs pdfdocs htmldocs mandocs installmandocs cleandocs xmldoclinks
  36
  37 BOOKS := $(addprefix $(obj)/,$(DOCBOOKS))
  38 xmldocs: $(BOOKS)
  39 sgmldocs: xmldocs
  40
  41 PS := $(patsubst %.xml, %.ps, $(BOOKS))
  42 psdocs: $(PS)
  43
  44 PDF := $(patsubst %.xml, %.pdf, $(BOOKS))
  45 pdfdocs: $(PDF)
  46
  47 HTML := $(sort $(patsubst %.xml, %.html, $(BOOKS)))
  48 htmldocs: $(HTML) xmldoclinks
  49         $(call build_main_index)
  50         $(call build_images)
  51
  52 MAN := $(patsubst %.xml, %.9, $(BOOKS))
  53 mandocs: $(MAN)
  54
  55 build_images = mkdir -p $(objtree)/Documentation/DocBook/media/ && \
  56                cp $(srctree)/Documentation/DocBook/dvb/*.png $(srctree)/Documentation/DocBook/v4l/*.gif $(objtree)/Documentation/DocBook/media/
  57
  58 xmldoclinks:
  59 ifneq ($(objtree),$(srctree))
  60         for dep in dvb media-entities.tmpl media-indices.tmpl v4l; do \
  61                 rm -f $(objtree)/Documentation/DocBook/$$dep \
  62                 && ln -s $(srctree)/Documentation/DocBook/$$dep $(objtree)/Documentation/DocBook/ \
  63                 || exit; \
  64         done
  65 endif
  66
  67 installmandocs: mandocs
  68         mkdir -p /usr/local/man/man9/
  69         install Documentation/DocBook/man/*.9.gz /usr/local/man/man9/
  70
  71 ###
  72 #External programs used
  73 KERNELDOC = $(srctree)/scripts/kernel-doc
  74 DOCPROC   = $(objtree)/scripts/basic/docproc
  75
  76 XMLTOFLAGS = -m $(srctree)/Documentation/DocBook/stylesheet.xsl
  77 XMLTOFLAGS += --skip-validation
  78
  79 ###
  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 $< >$@
  88 define rule_docproc
  89         set -e;                                                         \
  90         $(if $($(quiet)cmd_$(1)),echo '  $($(quiet)cmd_$(1))';)         \
  91         $(cmd_$(1));                                                    \
  92         (                                                               \
  93           echo 'cmd_$@ := $(cmd_$(1))';                                 \
  94           echo $@: `SRCTREE=$(srctree) $(DOCPROC) depend $<`;           \
  95         ) > $(dir $@).$(notdir $@).cmd
  96 endef
  97
  98 %.xml: %.tmpl xmldoclinks FORCE
  99         $(call if_changed_rule,docproc)
 100
 101 ###
 102 #Read in all saved dependency files
 103 cmd_files := $(wildcard $(foreach f,$(BOOKS),$(dir $(f)).$(notdir $(f)).cmd))
 104
 105 ifneq ($(cmd_files),)
 106   include $(cmd_files)
 107 endif
 108
 109 ###
 110 # Changes in kernel-doc force a rebuild of all documentation
 111 $(BOOKS): $(KERNELDOC)
 112
 113 # Tell kbuild to always build the programs
 114 always := $(hostprogs-y)
 115
 116 notfoundtemplate = echo "*** You have to install docbook-utils or xmlto ***"; \
 117                    exit 1
 118 db2xtemplate = db2TYPE -o $(dir $@) $<
 119 xmltotemplate = xmlto TYPE $(XMLTOFLAGS) -o $(dir $@) $<
 120
 121 # determine which methods are available
 122 ifeq ($(shell which db2ps >/dev/null 2>&1 && echo found),found)
 123         use-db2x = db2x
 124         prefer-db2x = db2x
 125 else
 126         use-db2x = notfound
 127         prefer-db2x = $(use-xmlto)
 128 endif
 129 ifeq ($(shell which xmlto >/dev/null 2>&1 && echo found),found)
 130         use-xmlto = xmlto
 131         prefer-xmlto = xmlto
 132 else
 133         use-xmlto = notfound
 134         prefer-xmlto = $(use-db2x)
 135 endif
 136
 137 # the commands, generated from the chosen template
 138 quiet_cmd_db2ps = PS      $@
 139       cmd_db2ps = $(subst TYPE,ps, $($(PS_METHOD)template))
 140 %.ps : %.xml
 141         $(call cmd,db2ps)
 142
 143 quiet_cmd_db2pdf = PDF     $@
 144       cmd_db2pdf = $(subst TYPE,pdf, $($(PDF_METHOD)template))
 145 %.pdf : %.xml
 146         $(call cmd,db2pdf)
 147
 148
 149 index = index.html
 150 main_idx = Documentation/DocBook/$(index)
 151 build_main_index = rm -rf $(main_idx) && \
 152                    echo '<h1>Linux Kernel HTML Documentation</h1>' >> $(main_idx) && \
 153                    echo '<h2>Kernel Version: $(KERNELVERSION)</h2>' >> $(main_idx) && \
 154                    cat $(HTML) >> $(main_idx)
 155
 156 quiet_cmd_db2html = HTML    $@
 157       cmd_db2html = xmlto xhtml $(XMLTOFLAGS) -o $(patsubst %.html,%,$@) $< && \
 158                 echo '<a HREF="$(patsubst %.html,%,$(notdir $@))/index.html"> \
 159         $(patsubst %.html,%,$(notdir $@))</a><p>' > $@
 160
 161 %.html: %.xml
 162         @(which xmlto > /dev/null 2>&1) || \
 163          (echo "*** You need to install xmlto ***"; \
 164           exit 1)
 165         @rm -rf $@ $(patsubst %.html,%,$@)
 166         $(call cmd,db2html)
 167         @if [ ! -z "$(PNG-$(basename $(notdir $@)))" ]; then \
 168             cp $(PNG-$(basename $(notdir $@))) $(patsubst %.html,%,$@); fi
 169
 170 quiet_cmd_db2man = MAN     $@
 171       cmd_db2man = if grep -q refentry $<; then xmlto man $(XMLTOFLAGS) -o $(obj)/man $< ; gzip -f $(obj)/man/*.9; fi
 172 %.9 : %.xml
 173         @(which xmlto > /dev/null 2>&1) || \
 174          (echo "*** You need to install xmlto ***"; \
 175           exit 1)
 176         $(Q)mkdir -p $(obj)/man
 177         $(call cmd,db2man)
 178         @touch $@
 179
 180 ###
 181 # Rules to generate postscripts and PNG images from .fig format files
 182 quiet_cmd_fig2eps = FIG2EPS $@
 183       cmd_fig2eps = fig2dev -Leps $< $@
 184
 185 %.eps: %.fig
 186         @(which fig2dev > /dev/null 2>&1) || \
 187          (echo "*** You need to install transfig ***"; \
 188           exit 1)
 189         $(call cmd,fig2eps)
 190
 191 quiet_cmd_fig2png = FIG2PNG $@
 192       cmd_fig2png = fig2dev -Lpng $< $@
 193
 194 %.png: %.fig
 195         @(which fig2dev > /dev/null 2>&1) || \
 196          (echo "*** You need to install transfig ***"; \
 197           exit 1)
 198         $(call cmd,fig2png)
 199
 200 ###
 201 # Rule to convert a .c file to inline XML documentation
 202        gen_xml = :
 203  quiet_gen_xml = echo '  GEN     $@'
 204 silent_gen_xml = :
 205 %.xml: %.c
 206         @$($(quiet)gen_xml)
 207         @(                            \
 208            echo "<programlisting>";   \
 209            expand --tabs=8 < $< |     \
 210            sed -e "s/&/\\&amp;/g"     \
 211                -e "s/</\\&lt;/g"      \
 212                -e "s/>/\\&gt;/g";     \
 213            echo "</programlisting>")  > $@
 214
 215 ###
 216 # Help targets as used by the top-level makefile
 217 dochelp:
 218         @echo  ' Linux kernel internal documentation in different formats:'
 219         @echo  '  htmldocs        - HTML'
 220         @echo  '  pdfdocs         - PDF'
 221         @echo  '  psdocs          - Postscript'
 222         @echo  '  xmldocs         - XML DocBook'
 223         @echo  '  mandocs         - man pages'
 224         @echo  '  installmandocs  - install man pages generated by mandocs'
 225         @echo  '  cleandocs       - clean all generated DocBook files'
 226
 227 ###
 228 # Temporary files left by various tools
 229 clean-files := $(DOCBOOKS) \
 230         $(patsubst %.xml, %.dvi,  $(DOCBOOKS)) \
 231         $(patsubst %.xml, %.aux,  $(DOCBOOKS)) \
 232         $(patsubst %.xml, %.tex,  $(DOCBOOKS)) \
 233         $(patsubst %.xml, %.log,  $(DOCBOOKS)) \
 234         $(patsubst %.xml, %.out,  $(DOCBOOKS)) \
 235         $(patsubst %.xml, %.ps,   $(DOCBOOKS)) \
 236         $(patsubst %.xml, %.pdf,  $(DOCBOOKS)) \
 237         $(patsubst %.xml, %.html, $(DOCBOOKS)) \
 238         $(patsubst %.xml, %.9,    $(DOCBOOKS)) \
 239         $(index)
 240
 241 clean-dirs := $(patsubst %.xml,%,$(DOCBOOKS)) man
 242
 243 cleandocs:
 244         $(Q)rm -f $(call objectify, $(clean-files))
 245         $(Q)rm -rf $(call objectify, $(clean-dirs))
 246
 247 # Declare the contents of the .PHONY variable as phony.  We keep that
 248 # information in a variable se we can use it in if_changed and friends.
 249
 250 .PHONY: $(PHONY)