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  \
  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             debugobjects.xml sh.xml regulator.xml \
  16             alsa-driver-api.xml writing-an-alsa-driver.xml \
  17             tracepoint.xml w1.xml \
  18             writing_musb_glue_layer.xml crypto-API.xml iio.xml
  19
  20 ifeq ($(DOCBOOKS),)
  21
  22 # Skip DocBook build if the user explicitly requested no DOCBOOKS.
  23 .DEFAULT:
  24         @echo "  SKIP    DocBook $@ target (DOCBOOKS=\"\" specified)."
  25 else
  26 ifneq ($(SPHINXDIRS),)
  27
  28 # Skip DocBook build if the user explicitly requested a sphinx dir
  29 .DEFAULT:
  30         @echo "  SKIP    DocBook $@ target (SPHINXDIRS specified)."
  31 else
  32
  33
  34 ###
  35 # The build process is as follows (targets):
  36 #              (xmldocs) [by docproc]
  37 # file.tmpl --> file.xml +--> file.ps   (psdocs)   [by db2ps or xmlto]
  38 #                        +--> file.pdf  (pdfdocs)  [by db2pdf or xmlto]
  39 #                        +--> DIR=file  (htmldocs) [by xmlto]
  40 #                        +--> man/      (mandocs)  [by xmlto]
  41
  42
  43 # for PDF and PS output you can choose between xmlto and docbook-utils tools
  44 PDF_METHOD      = $(prefer-db2x)
  45 PS_METHOD       = $(prefer-db2x)
  46
  47
  48 targets += $(DOCBOOKS)
  49 BOOKS := $(addprefix $(obj)/,$(DOCBOOKS))
  50 xmldocs: $(BOOKS)
  51 sgmldocs: xmldocs
  52
  53 PS := $(patsubst %.xml, %.ps, $(BOOKS))
  54 psdocs: $(PS)
  55
  56 PDF := $(patsubst %.xml, %.pdf, $(BOOKS))
  57 pdfdocs: $(PDF)
  58
  59 HTML := $(sort $(patsubst %.xml, %.html, $(BOOKS)))
  60 htmldocs: $(HTML)
  61         $(call cmd,build_main_index)
  62
  63 MAN := $(patsubst %.xml, %.9, $(BOOKS))
  64 mandocs: $(MAN)
  65         find $(obj)/man -name '*.9' | xargs gzip -nf
  66
  67 installmandocs: mandocs
  68         mkdir -p /usr/local/man/man9/
  69         find $(obj)/man -name '*.9.gz' -printf '%h %f\n' | \
  70                 sort -k 2 -k 1 | uniq -f 1 | sed -e 's: :/:' | \
  71                 xargs install -m 644 -t /usr/local/man/man9/
  72
  73 # no-op for the DocBook toolchain
  74 epubdocs:
  75 latexdocs:
  76
  77 ###
  78 #External programs used
  79 KERNELDOCXMLREF = $(srctree)/scripts/kernel-doc-xml-ref
  80 KERNELDOC       = $(srctree)/scripts/kernel-doc
  81 DOCPROC         = $(objtree)/scripts/docproc
  82 CHECK_LC_CTYPE = $(objtree)/scripts/check-lc_ctype
  83
  84 # Use a fixed encoding - UTF-8 if the C library has support built-in
  85 # or ASCII if not
  86 LC_CTYPE := $(call try-run, LC_CTYPE=C.UTF-8 $(CHECK_LC_CTYPE),C.UTF-8,C)
  87 export LC_CTYPE
  88
  89 XMLTOFLAGS = -m $(srctree)/$(src)/stylesheet.xsl
  90 XMLTOFLAGS += --skip-validation
  91
  92 ###
  93 # DOCPROC is used for two purposes:
  94 # 1) To generate a dependency list for a .tmpl file
  95 # 2) To preprocess a .tmpl file and call kernel-doc with
  96 #     appropriate parameters.
  97 # The following rules are used to generate the .xml documentation
  98 # required to generate the final targets. (ps, pdf, html).
  99 quiet_cmd_docproc = DOCPROC $@
 100       cmd_docproc = SRCTREE=$(srctree)/ $(DOCPROC) doc $< >$@
 101 define rule_docproc
 102         set -e;                                                         \
 103         $(if $($(quiet)cmd_$(1)),echo '  $($(quiet)cmd_$(1))';)         \
 104         $(cmd_$(1));                                                    \
 105         (                                                               \
 106           echo 'cmd_$@ := $(cmd_$(1))';                                 \
 107           echo $@: `SRCTREE=$(srctree) $(DOCPROC) depend $<`;           \
 108         ) > $(dir $@).$(notdir $@).cmd
 109 endef
 110
 111 %.xml: %.tmpl $(KERNELDOC) $(DOCPROC) $(KERNELDOCXMLREF) FORCE
 112         $(call if_changed_rule,docproc)
 113
 114 # Tell kbuild to always build the programs
 115 always := $(hostprogs-y)
 116
 117 notfoundtemplate = echo "*** You have to install docbook-utils or xmlto ***"; \
 118                    exit 1
 119 db2xtemplate = db2TYPE -o $(dir $@) $<
 120 xmltotemplate = xmlto TYPE $(XMLTOFLAGS) -o $(dir $@) $<
 121
 122 # determine which methods are available
 123 ifeq ($(shell which db2ps >/dev/null 2>&1 && echo found),found)
 124         use-db2x = db2x
 125         prefer-db2x = db2x
 126 else
 127         use-db2x = notfound
 128         prefer-db2x = $(use-xmlto)
 129 endif
 130 ifeq ($(shell which xmlto >/dev/null 2>&1 && echo found),found)
 131         use-xmlto = xmlto
 132         prefer-xmlto = xmlto
 133 else
 134         use-xmlto = notfound
 135         prefer-xmlto = $(use-db2x)
 136 endif
 137
 138 # the commands, generated from the chosen template
 139 quiet_cmd_db2ps = PS      $@
 140       cmd_db2ps = $(subst TYPE,ps, $($(PS_METHOD)template))
 141 %.ps : %.xml
 142         $(call cmd,db2ps)
 143
 144 quiet_cmd_db2pdf = PDF     $@
 145       cmd_db2pdf = $(subst TYPE,pdf, $($(PDF_METHOD)template))
 146 %.pdf : %.xml
 147         $(call cmd,db2pdf)
 148
 149
 150 index = index.html
 151 main_idx = $(obj)/$(index)
 152 quiet_cmd_build_main_index = HTML    $(main_idx)
 153       cmd_build_main_index = rm -rf $(main_idx); \
 154                    echo '<h1>Linux Kernel HTML Documentation</h1>' >> $(main_idx) && \
 155                    echo '<h2>Kernel Version: $(KERNELVERSION)</h2>' >> $(main_idx) && \
 156                    cat $(HTML) >> $(main_idx)
 157
 158 quiet_cmd_db2html = HTML    $@
 159       cmd_db2html = xmlto html $(XMLTOFLAGS) -o $(patsubst %.html,%,$@) $< && \
 160                 echo '<a HREF="$(patsubst %.html,%,$(notdir $@))/index.html"> \
 161                 $(patsubst %.html,%,$(notdir $@))</a><p>' > $@
 162
 163 ###
 164 # Rules to create an aux XML and .db, and use them to re-process the DocBook XML
 165 # to fill internal hyperlinks
 166        gen_aux_xml = :
 167  quiet_gen_aux_xml = echo '  XMLREF  $@'
 168 silent_gen_aux_xml = :
 169 %.aux.xml: %.xml
 170         @$($(quiet)gen_aux_xml)
 171         @rm -rf $@
 172         @(cat $< | egrep "^<refentry id" | egrep -o "\".*\"" | cut -f 2 -d \" > $<.db)
 173         @$(KERNELDOCXMLREF) -db $<.db $< > $@
 174 .PRECIOUS: %.aux.xml
 175
 176 %.html: %.aux.xml
 177         @(which xmlto > /dev/null 2>&1) || \
 178          (echo "*** You need to install xmlto ***"; \
 179           exit 1)
 180         @rm -rf $@ $(patsubst %.html,%,$@)
 181         $(call cmd,db2html)
 182         @if [ ! -z "$(PNG-$(basename $(notdir $@)))" ]; then \
 183             cp $(PNG-$(basename $(notdir $@))) $(patsubst %.html,%,$@); fi
 184
 185 quiet_cmd_db2man = MAN     $@
 186       cmd_db2man = if grep -q refentry $<; then xmlto man $(XMLTOFLAGS) -o $(obj)/man/$(*F) $< ; fi
 187 %.9 : %.xml
 188         @(which xmlto > /dev/null 2>&1) || \
 189          (echo "*** You need to install xmlto ***"; \
 190           exit 1)
 191         $(Q)mkdir -p $(obj)/man/$(*F)
 192         $(call cmd,db2man)
 193         @touch $@
 194
 195 ###
 196 # Rules to generate postscripts and PNG images from .fig format files
 197 quiet_cmd_fig2eps = FIG2EPS $@
 198       cmd_fig2eps = fig2dev -Leps $< $@
 199
 200 %.eps: %.fig
 201         @(which fig2dev > /dev/null 2>&1) || \
 202          (echo "*** You need to install transfig ***"; \
 203           exit 1)
 204         $(call cmd,fig2eps)
 205
 206 quiet_cmd_fig2png = FIG2PNG $@
 207       cmd_fig2png = fig2dev -Lpng $< $@
 208
 209 %.png: %.fig
 210         @(which fig2dev > /dev/null 2>&1) || \
 211          (echo "*** You need to install transfig ***"; \
 212           exit 1)
 213         $(call cmd,fig2png)
 214
 215 ###
 216 # Rule to convert a .c file to inline XML documentation
 217        gen_xml = :
 218  quiet_gen_xml = echo '  GEN     $@'
 219 silent_gen_xml = :
 220 %.xml: %.c
 221         @$($(quiet)gen_xml)
 222         @(                            \
 223            echo "<programlisting>";   \
 224            expand --tabs=8 < $< |     \
 225            sed -e "s/&/\\&amp;/g"     \
 226                -e "s/</\\&lt;/g"      \
 227                -e "s/>/\\&gt;/g";     \
 228            echo "</programlisting>")  > $@
 229
 230 endif # DOCBOOKS=""
 231 endif # SPHINDIR=...
 232
 233 ###
 234 # Help targets as used by the top-level makefile
 235 dochelp:
 236         @echo  ' Linux kernel internal documentation in different formats (DocBook):'
 237         @echo  '  htmldocs        - HTML'
 238         @echo  '  pdfdocs         - PDF'
 239         @echo  '  psdocs          - Postscript'
 240         @echo  '  xmldocs         - XML DocBook'
 241         @echo  '  mandocs         - man pages'
 242         @echo  '  installmandocs  - install man pages generated by mandocs'
 243         @echo  '  cleandocs       - clean all generated DocBook files'
 244         @echo
 245         @echo  '  make DOCBOOKS="s1.xml s2.xml" [target] Generate only docs s1.xml s2.xml'
 246         @echo  '  valid values for DOCBOOKS are: $(DOCBOOKS)'
 247         @echo
 248         @echo  "  make DOCBOOKS=\"\" [target] Don't generate docs from Docbook"
 249         @echo  '     This is useful to generate only the ReST docs (Sphinx)'
 250
 251
 252 ###
 253 # Temporary files left by various tools
 254 clean-files := $(DOCBOOKS) \
 255         $(patsubst %.xml, %.dvi,     $(DOCBOOKS)) \
 256         $(patsubst %.xml, %.aux,     $(DOCBOOKS)) \
 257         $(patsubst %.xml, %.tex,     $(DOCBOOKS)) \
 258         $(patsubst %.xml, %.log,     $(DOCBOOKS)) \
 259         $(patsubst %.xml, %.out,     $(DOCBOOKS)) \
 260         $(patsubst %.xml, %.ps,      $(DOCBOOKS)) \
 261         $(patsubst %.xml, %.pdf,     $(DOCBOOKS)) \
 262         $(patsubst %.xml, %.html,    $(DOCBOOKS)) \
 263         $(patsubst %.xml, %.9,       $(DOCBOOKS)) \
 264         $(patsubst %.xml, %.aux.xml, $(DOCBOOKS)) \
 265         $(patsubst %.xml, %.xml.db,  $(DOCBOOKS)) \
 266         $(patsubst %.xml, %.xml,     $(DOCBOOKS)) \
 267         $(index)
 268
 269 clean-dirs := $(patsubst %.xml,%,$(DOCBOOKS)) man
 270
 271 cleandocs:
 272         $(Q)rm -f $(call objectify, $(clean-files))
 273         $(Q)rm -rf $(call objectify, $(clean-dirs))
 274
 275 # Declare the contents of the .PHONY variable as phony.  We keep that
 276 # information in a variable se we can use it in if_changed and friends.
 277
 278 .PHONY: $(PHONY)