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 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             mac80211.xml debugobjects.xml sh.xml
  16
  17 ###
  18 # The build process is as follows (targets):
  19 #              (xmldocs) [by docproc]
  20 # file.tmpl --> file.xml +--> file.ps   (psdocs)   [by db2ps or xmlto]
  21 #                        +--> file.pdf  (pdfdocs)  [by db2pdf or xmlto]
  22 #                        +--> DIR=file  (htmldocs) [by xmlto]
  23 #                        +--> man/      (mandocs)  [by xmlto]
  24
  25
  26 # for PDF and PS output you can choose between xmlto and docbook-utils tools
  27 PDF_METHOD      = $(prefer-db2x)
  28 PS_METHOD       = $(prefer-db2x)
  29
  30
  31 ###
  32 # The targets that may be used.
  33 PHONY += xmldocs sgmldocs psdocs pdfdocs htmldocs mandocs installmandocs
  34
  35 BOOKS := $(addprefix $(obj)/,$(DOCBOOKS))
  36 xmldocs: $(BOOKS)
  37 sgmldocs: xmldocs
  38
  39 PS := $(patsubst %.xml, %.ps, $(BOOKS))
  40 psdocs: $(PS)
  41
  42 PDF := $(patsubst %.xml, %.pdf, $(BOOKS))
  43 pdfdocs: $(PDF)
  44
  45 HTML := $(sort $(patsubst %.xml, %.html, $(BOOKS)))
  46 htmldocs: $(HTML)
  47         $(call build_main_index)
  48
  49 MAN := $(patsubst %.xml, %.9, $(BOOKS))
  50 mandocs: $(MAN)
  51
  52 installmandocs: mandocs
  53         mkdir -p /usr/local/man/man9/
  54         install Documentation/DocBook/man/*.9.gz /usr/local/man/man9/
  55
  56 ###
  57 #External programs used
  58 KERNELDOC = $(srctree)/scripts/kernel-doc
  59 DOCPROC   = $(objtree)/scripts/basic/docproc
  60
  61 XMLTOFLAGS = -m $(srctree)/Documentation/DocBook/stylesheet.xsl
  62 #XMLTOFLAGS += --skip-validation
  63
  64 ###
  65 # DOCPROC is used for two purposes:
  66 # 1) To generate a dependency list for a .tmpl file
  67 # 2) To preprocess a .tmpl file and call kernel-doc with
  68 #     appropriate parameters.
  69 # The following rules are used to generate the .xml documentation
  70 # required to generate the final targets. (ps, pdf, html).
  71 quiet_cmd_docproc = DOCPROC $@
  72       cmd_docproc = SRCTREE=$(srctree)/ $(DOCPROC) doc $< >$@
  73 define rule_docproc
  74         set -e;                                                         \
  75         $(if $($(quiet)cmd_$(1)),echo '  $($(quiet)cmd_$(1))';)         \
  76         $(cmd_$(1));                                                    \
  77         (                                                               \
  78           echo 'cmd_$@ := $(cmd_$(1))';                                 \
  79           echo $@: `SRCTREE=$(srctree) $(DOCPROC) depend $<`;           \
  80         ) > $(dir $@).$(notdir $@).cmd
  81 endef
  82
  83 %.xml: %.tmpl FORCE
  84         $(call if_changed_rule,docproc)
  85
  86 ###
  87 #Read in all saved dependency files
  88 cmd_files := $(wildcard $(foreach f,$(BOOKS),$(dir $(f)).$(notdir $(f)).cmd))
  89
  90 ifneq ($(cmd_files),)
  91   include $(cmd_files)
  92 endif
  93
  94 ###
  95 # Changes in kernel-doc force a rebuild of all documentation
  96 $(BOOKS): $(KERNELDOC)
  97
  98 ###
  99 # procfs guide uses a .c file as example code.
 100 # This requires an explicit dependency
 101 C-procfs-example = procfs_example.xml
 102 C-procfs-example2 = $(addprefix $(obj)/,$(C-procfs-example))
 103 $(obj)/procfs-guide.xml: $(C-procfs-example2)
 104
 105 # List of programs to build
 106 ##oops, this is a kernel module::hostprogs-y := procfs_example
 107 obj-m += procfs_example.o
 108
 109 # Tell kbuild to always build the programs
 110 always := $(hostprogs-y)
 111
 112 notfoundtemplate = echo "*** You have to install docbook-utils or xmlto ***"; \
 113                    exit 1
 114 db2xtemplate = db2TYPE -o $(dir $@) $<
 115 xmltotemplate = xmlto TYPE $(XMLTOFLAGS) -o $(dir $@) $<
 116
 117 # determine which methods are available
 118 ifeq ($(shell which db2ps >/dev/null 2>&1 && echo found),found)
 119         use-db2x = db2x
 120         prefer-db2x = db2x
 121 else
 122         use-db2x = notfound
 123         prefer-db2x = $(use-xmlto)
 124 endif
 125 ifeq ($(shell which xmlto >/dev/null 2>&1 && echo found),found)
 126         use-xmlto = xmlto
 127         prefer-xmlto = xmlto
 128 else
 129         use-xmlto = notfound
 130         prefer-xmlto = $(use-db2x)
 131 endif
 132
 133 # the commands, generated from the chosen template
 134 quiet_cmd_db2ps = PS      $@
 135       cmd_db2ps = $(subst TYPE,ps, $($(PS_METHOD)template))
 136 %.ps : %.xml
 137         $(call cmd,db2ps)
 138
 139 quiet_cmd_db2pdf = PDF      $@
 140       cmd_db2pdf = $(subst TYPE,pdf, $($(PDF_METHOD)template))
 141 %.pdf : %.xml
 142         $(call cmd,db2pdf)
 143
 144
 145 main_idx = Documentation/DocBook/index.html
 146 build_main_index = rm -rf $(main_idx) && \
 147                    echo '<h1>Linux Kernel HTML Documentation</h1>' >> $(main_idx) && \
 148                    echo '<h2>Kernel Version: $(KERNELVERSION)</h2>' >> $(main_idx) && \
 149                    cat $(HTML) >> $(main_idx)
 150
 151 quiet_cmd_db2html = HTML   $@
 152       cmd_db2html = xmlto xhtml $(XMLTOFLAGS) -o $(patsubst %.html,%,$@) $< && \
 153                 echo '<a HREF="$(patsubst %.html,%,$(notdir $@))/index.html"> \
 154         $(patsubst %.html,%,$(notdir $@))</a><p>' > $@
 155
 156 %.html: %.xml
 157         @(which xmlto > /dev/null 2>&1) || \
 158          (echo "*** You need to install xmlto ***"; \
 159           exit 1)
 160         @rm -rf $@ $(patsubst %.html,%,$@)
 161         $(call cmd,db2html)
 162         @if [ ! -z "$(PNG-$(basename $(notdir $@)))" ]; then \
 163             cp $(PNG-$(basename $(notdir $@))) $(patsubst %.html,%,$@); fi
 164
 165 quiet_cmd_db2man = MAN     $@
 166       cmd_db2man = if grep -q refentry $<; then xmlto man $(XMLTOFLAGS) -o $(obj)/man $< ; gzip -f $(obj)/man/*.9; fi
 167 %.9 : %.xml
 168         @(which xmlto > /dev/null 2>&1) || \
 169          (echo "*** You need to install xmlto ***"; \
 170           exit 1)
 171         $(Q)mkdir -p $(obj)/man
 172         $(call cmd,db2man)
 173         @touch $@
 174
 175 ###
 176 # Rules to generate postscripts and PNG images from .fig format files
 177 quiet_cmd_fig2eps = FIG2EPS $@
 178       cmd_fig2eps = fig2dev -Leps $< $@
 179
 180 %.eps: %.fig
 181         @(which fig2dev > /dev/null 2>&1) || \
 182          (echo "*** You need to install transfig ***"; \
 183           exit 1)
 184         $(call cmd,fig2eps)
 185
 186 quiet_cmd_fig2png = FIG2PNG $@
 187       cmd_fig2png = fig2dev -Lpng $< $@
 188
 189 %.png: %.fig
 190         @(which fig2dev > /dev/null 2>&1) || \
 191          (echo "*** You need to install transfig ***"; \
 192           exit 1)
 193         $(call cmd,fig2png)
 194
 195 ###
 196 # Rule to convert a .c file to inline XML documentation
 197        gen_xml = :
 198  quiet_gen_xml = echo '  GEN     $@'
 199 silent_gen_xml = :
 200 %.xml: %.c
 201         @$($(quiet)gen_xml)
 202         @(                            \
 203            echo "<programlisting>";   \
 204            expand --tabs=8 < $< |     \
 205            sed -e "s/&/\\&amp;/g"     \
 206                -e "s/</\\&lt;/g"      \
 207                -e "s/>/\\&gt;/g";     \
 208            echo "</programlisting>")  > $@
 209
 210 ###
 211 # Help targets as used by the top-level makefile
 212 dochelp:
 213         @echo  ' Linux kernel internal documentation in different formats:'
 214         @echo  '  htmldocs        - HTML'
 215         @echo  '  installmandocs  - install man pages generated by mandocs'
 216         @echo  '  mandocs         - man pages'
 217         @echo  '  pdfdocs         - PDF'
 218         @echo  '  psdocs          - Postscript'
 219         @echo  '  xmldocs         - XML DocBook'
 220
 221 ###
 222 # Temporary files left by various tools
 223 clean-files := $(DOCBOOKS) \
 224         $(patsubst %.xml, %.dvi,  $(DOCBOOKS)) \
 225         $(patsubst %.xml, %.aux,  $(DOCBOOKS)) \
 226         $(patsubst %.xml, %.tex,  $(DOCBOOKS)) \
 227         $(patsubst %.xml, %.log,  $(DOCBOOKS)) \
 228         $(patsubst %.xml, %.out,  $(DOCBOOKS)) \
 229         $(patsubst %.xml, %.ps,   $(DOCBOOKS)) \
 230         $(patsubst %.xml, %.pdf,  $(DOCBOOKS)) \
 231         $(patsubst %.xml, %.html, $(DOCBOOKS)) \
 232         $(patsubst %.xml, %.9,    $(DOCBOOKS)) \
 233         $(C-procfs-example)
 234
 235 clean-dirs := $(patsubst %.xml,%,$(DOCBOOKS)) man
 236
 237 # Declare the contents of the .PHONY variable as phony.  We keep that
 238 # information in a variable se we can use it in if_changed and friends.
 239
 240 .PHONY: $(PHONY)