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