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 := wanbook.xml z8530book.xml mcabook.xml videobook.xml \
  10             kernel-hacking.xml kernel-locking.xml deviceiobook.xml \
  11             procfs-guide.xml writing_usb_driver.xml \
  12             kernel-api.xml filesystems.xml lsm.xml usb.xml \
  13             gadget.xml libata.xml mtdnand.xml librs.xml rapidio.xml \
  14             genericirq.xml
  15
  16 ###
  17 # The build process is as follows (targets):
  18 #              (xmldocs)
  19 # file.tmpl --> file.xml +--> file.ps   (psdocs)
  20 #                        +--> file.pdf  (pdfdocs)
  21 #                        +--> DIR=file  (htmldocs)
  22 #                        +--> man/      (mandocs)
  23
  24
  25 # for PDF and PS output you can choose between xmlto and docbook-utils tools
  26 PDF_METHOD      = $(prefer-db2x)
  27 PS_METHOD       = $(prefer-db2x)
  28
  29
  30 ###
  31 # The targets that may be used.
  32 PHONY += xmldocs sgmldocs psdocs pdfdocs htmldocs mandocs installmandocs
  33
  34 BOOKS := $(addprefix $(obj)/,$(DOCBOOKS))
  35 xmldocs: $(BOOKS)
  36 sgmldocs: xmldocs
  37
  38 PS := $(patsubst %.xml, %.ps, $(BOOKS))
  39 psdocs: $(PS)
  40
  41 PDF := $(patsubst %.xml, %.pdf, $(BOOKS))
  42 pdfdocs: $(PDF)
  43
  44 HTML := $(patsubst %.xml, %.html, $(BOOKS))
  45 htmldocs: $(HTML)
  46
  47 MAN := $(patsubst %.xml, %.9, $(BOOKS))
  48 mandocs: $(MAN)
  49
  50 installmandocs: mandocs
  51         mkdir -p /usr/local/man/man9/
  52         install Documentation/DocBook/man/*.9.gz /usr/local/man/man9/
  53
  54 ###
  55 #External programs used
  56 KERNELDOC = $(srctree)/scripts/kernel-doc
  57 DOCPROC   = $(objtree)/scripts/basic/docproc
  58
  59 XMLTOFLAGS = -m $(srctree)/Documentation/DocBook/stylesheet.xsl
  60 #XMLTOFLAGS += --skip-validation
  61
  62 ###
  63 # DOCPROC is used for two purposes:
  64 # 1) To generate a dependency list for a .tmpl file
  65 # 2) To preprocess a .tmpl file and call kernel-doc with
  66 #     appropriate parameters.
  67 # The following rules are used to generate the .xml documentation
  68 # required to generate the final targets. (ps, pdf, html).
  69 quiet_cmd_docproc = DOCPROC $@
  70       cmd_docproc = SRCTREE=$(srctree)/ $(DOCPROC) doc $< >$@
  71 define rule_docproc
  72         set -e;                                                         \
  73         $(if $($(quiet)cmd_$(1)),echo '  $($(quiet)cmd_$(1))';)         \
  74         $(cmd_$(1));                                                    \
  75         (                                                               \
  76           echo 'cmd_$@ := $(cmd_$(1))';                                 \
  77           echo $@: `SRCTREE=$(srctree) $(DOCPROC) depend $<`;           \
  78         ) > $(dir $@).$(notdir $@).cmd
  79 endef
  80
  81 %.xml: %.tmpl FORCE
  82         $(call if_changed_rule,docproc)
  83
  84 ###
  85 #Read in all saved dependency files
  86 cmd_files := $(wildcard $(foreach f,$(BOOKS),$(dir $(f)).$(notdir $(f)).cmd))
  87
  88 ifneq ($(cmd_files),)
  89   include $(cmd_files)
  90 endif
  91
  92 ###
  93 # Changes in kernel-doc force a rebuild of all documentation
  94 $(BOOKS): $(KERNELDOC)
  95
  96 ###
  97 # procfs guide uses a .c file as example code.
  98 # This requires an explicit dependency
  99 C-procfs-example = procfs_example.xml
 100 C-procfs-example2 = $(addprefix $(obj)/,$(C-procfs-example))
 101 $(obj)/procfs-guide.xml: $(C-procfs-example2)
 102
 103 notfoundtemplate = echo "*** You have to install docbook-utils or xmlto ***"; \
 104                    exit 1
 105 db2xtemplate = db2TYPE -o $(dir $@) $<
 106 xmltotemplate = xmlto TYPE $(XMLTOFLAGS) -o $(dir $@) $<
 107
 108 # determine which methods are available
 109 ifeq ($(shell which db2ps >/dev/null 2>&1 && echo found),found)
 110         use-db2x = db2x
 111         prefer-db2x = db2x
 112 else
 113         use-db2x = notfound
 114         prefer-db2x = $(use-xmlto)
 115 endif
 116 ifeq ($(shell which xmlto >/dev/null 2>&1 && echo found),found)
 117         use-xmlto = xmlto
 118         prefer-xmlto = xmlto
 119 else
 120         use-xmlto = notfound
 121         prefer-xmlto = $(use-db2x)
 122 endif
 123
 124 # the commands, generated from the chosen template
 125 quiet_cmd_db2ps = PS      $@
 126       cmd_db2ps = $(subst TYPE,ps, $($(PS_METHOD)template))
 127 %.ps : %.xml
 128         $(call cmd,db2ps)
 129
 130 quiet_cmd_db2pdf = PDF      $@
 131       cmd_db2pdf = $(subst TYPE,pdf, $($(PDF_METHOD)template))
 132 %.pdf : %.xml
 133         $(call cmd,db2pdf)
 134
 135 quiet_cmd_db2html = HTML   $@
 136       cmd_db2html = xmlto xhtml $(XMLTOFLAGS) -o $(patsubst %.html,%,$@) $< && \
 137                 echo '<a HREF="$(patsubst %.html,%,$(notdir $@))/index.html"> \
 138          Goto $(patsubst %.html,%,$(notdir $@))</a><p>' > $@
 139
 140 %.html: %.xml
 141         @(which xmlto > /dev/null 2>&1) || \
 142          (echo "*** You need to install xmlto ***"; \
 143           exit 1)
 144         @rm -rf $@ $(patsubst %.html,%,$@)
 145         $(call cmd,db2html)
 146         @if [ ! -z "$(PNG-$(basename $(notdir $@)))" ]; then \
 147             cp $(PNG-$(basename $(notdir $@))) $(patsubst %.html,%,$@); fi
 148
 149 quiet_cmd_db2man = MAN     $@
 150       cmd_db2man = if grep -q refentry $<; then xmlto man $(XMLTOFLAGS) -o $(obj)/man $< ; gzip -f $(obj)/man/*.9; fi
 151 %.9 : %.xml
 152         @(which xmlto > /dev/null 2>&1) || \
 153          (echo "*** You need to install xmlto ***"; \
 154           exit 1)
 155         $(call cmd,db2man)
 156         @touch $@
 157
 158 ###
 159 # Rules to generate postscripts and PNG imgages from .fig format files
 160 quiet_cmd_fig2eps = FIG2EPS $@
 161       cmd_fig2eps = fig2dev -Leps $< $@
 162
 163 %.eps: %.fig
 164         @(which fig2dev > /dev/null 2>&1) || \
 165          (echo "*** You need to install transfig ***"; \
 166           exit 1)
 167         $(call cmd,fig2eps)
 168
 169 quiet_cmd_fig2png = FIG2PNG $@
 170       cmd_fig2png = fig2dev -Lpng $< $@
 171
 172 %.png: %.fig
 173         @(which fig2dev > /dev/null 2>&1) || \
 174          (echo "*** You need to install transfig ***"; \
 175           exit 1)
 176         $(call cmd,fig2png)
 177
 178 ###
 179 # Rule to convert a .c file to inline XML documentation
 180 %.xml: %.c
 181         @echo '  GEN     $@'
 182         @(                            \
 183            echo "<programlisting>";   \
 184            expand --tabs=8 < $< |     \
 185            sed -e "s/&/\\&amp;/g"     \
 186                -e "s/</\\&lt;/g"      \
 187                -e "s/>/\\&gt;/g";     \
 188            echo "</programlisting>")  > $@
 189
 190 ###
 191 # Help targets as used by the top-level makefile
 192 dochelp:
 193         @echo  ' Linux kernel internal documentation in different formats:'
 194         @echo  '  htmldocs        - HTML'
 195         @echo  '  installmandocs  - install man pages generated by mandocs'
 196         @echo  '  mandocs         - man pages'
 197         @echo  '  pdfdocs         - PDF'
 198         @echo  '  psdocs          - Postscript'
 199         @echo  '  xmldocs         - XML DocBook'
 200
 201 ###
 202 # Temporary files left by various tools
 203 clean-files := $(DOCBOOKS) \
 204         $(patsubst %.xml, %.dvi,  $(DOCBOOKS)) \
 205         $(patsubst %.xml, %.aux,  $(DOCBOOKS)) \
 206         $(patsubst %.xml, %.tex,  $(DOCBOOKS)) \
 207         $(patsubst %.xml, %.log,  $(DOCBOOKS)) \
 208         $(patsubst %.xml, %.out,  $(DOCBOOKS)) \
 209         $(patsubst %.xml, %.ps,   $(DOCBOOKS)) \
 210         $(patsubst %.xml, %.pdf,  $(DOCBOOKS)) \
 211         $(patsubst %.xml, %.html, $(DOCBOOKS)) \
 212         $(patsubst %.xml, %.9,    $(DOCBOOKS)) \
 213         $(C-procfs-example)
 214
 215 clean-dirs := $(patsubst %.xml,%,$(DOCBOOKS))
 216
 217 #man put files in man subdir - traverse down
 218 subdir- := man/
 219
 220
 221 # Declare the contents of the .PHONY variable as phony.  We keep that
 222 # information in a variable se we can use it in if_changed and friends.
 223
 224 .PHONY: $(PHONY)