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 s390-drivers.xml uio-howto.xml scsi.xml
  15
  16 ###
  17 # The build process is as follows (targets):
  18 #              (xmldocs) [by docproc]
  19 # file.tmpl --> file.xml +--> file.ps   (psdocs)   [by db2ps or xmlto]
  20 #                        +--> file.pdf  (pdfdocs)  [by db2pdf or xmlto]
  21 #                        +--> DIR=file  (htmldocs) [by xmlto]
  22 #                        +--> man/      (mandocs)  [by xmlto]
  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 := $(sort $(patsubst %.xml, %.html, $(BOOKS)))
  45 htmldocs: $(HTML)
  46         $(call build_main_index)
  47
  48 MAN := $(patsubst %.xml, %.9, $(BOOKS))
  49 mandocs: $(MAN)
  50
  51 installmandocs: mandocs
  52         mkdir -p /usr/local/man/man9/
  53         install Documentation/DocBook/man/*.9.gz /usr/local/man/man9/
  54
  55 ###
  56 #External programs used
  57 KERNELDOC = $(srctree)/scripts/kernel-doc
  58 DOCPROC   = $(objtree)/scripts/basic/docproc
  59
  60 XMLTOFLAGS = -m $(srctree)/Documentation/DocBook/stylesheet.xsl
  61 #XMLTOFLAGS += --skip-validation
  62
  63 ###
  64 # DOCPROC is used for two purposes:
  65 # 1) To generate a dependency list for a .tmpl file
  66 # 2) To preprocess a .tmpl file and call kernel-doc with
  67 #     appropriate parameters.
  68 # The following rules are used to generate the .xml documentation
  69 # required to generate the final targets. (ps, pdf, html).
  70 quiet_cmd_docproc = DOCPROC $@
  71       cmd_docproc = SRCTREE=$(srctree)/ $(DOCPROC) doc $< >$@
  72 define rule_docproc
  73         set -e;                                                         \
  74         $(if $($(quiet)cmd_$(1)),echo '  $($(quiet)cmd_$(1))';)         \
  75         $(cmd_$(1));                                                    \
  76         (                                                               \
  77           echo 'cmd_$@ := $(cmd_$(1))';                                 \
  78           echo $@: `SRCTREE=$(srctree) $(DOCPROC) depend $<`;           \
  79         ) > $(dir $@).$(notdir $@).cmd
  80 endef
  81
  82 %.xml: %.tmpl FORCE
  83         $(call if_changed_rule,docproc)
  84
  85 ###
  86 #Read in all saved dependency files
  87 cmd_files := $(wildcard $(foreach f,$(BOOKS),$(dir $(f)).$(notdir $(f)).cmd))
  88
  89 ifneq ($(cmd_files),)
  90   include $(cmd_files)
  91 endif
  92
  93 ###
  94 # Changes in kernel-doc force a rebuild of all documentation
  95 $(BOOKS): $(KERNELDOC)
  96
  97 ###
  98 # procfs guide uses a .c file as example code.
  99 # This requires an explicit dependency
 100 C-procfs-example = procfs_example.xml
 101 C-procfs-example2 = $(addprefix $(obj)/,$(C-procfs-example))
 102 $(obj)/procfs-guide.xml: $(C-procfs-example2)
 103
 104 notfoundtemplate = echo "*** You have to install docbook-utils or xmlto ***"; \
 105                    exit 1
 106 db2xtemplate = db2TYPE -o $(dir $@) $<
 107 xmltotemplate = xmlto TYPE $(XMLTOFLAGS) -o $(dir $@) $<
 108
 109 # determine which methods are available
 110 ifeq ($(shell which db2ps >/dev/null 2>&1 && echo found),found)
 111         use-db2x = db2x
 112         prefer-db2x = db2x
 113 else
 114         use-db2x = notfound
 115         prefer-db2x = $(use-xmlto)
 116 endif
 117 ifeq ($(shell which xmlto >/dev/null 2>&1 && echo found),found)
 118         use-xmlto = xmlto
 119         prefer-xmlto = xmlto
 120 else
 121         use-xmlto = notfound
 122         prefer-xmlto = $(use-db2x)
 123 endif
 124
 125 # the commands, generated from the chosen template
 126 quiet_cmd_db2ps = PS      $@
 127       cmd_db2ps = $(subst TYPE,ps, $($(PS_METHOD)template))
 128 %.ps : %.xml
 129         $(call cmd,db2ps)
 130
 131 quiet_cmd_db2pdf = PDF      $@
 132       cmd_db2pdf = $(subst TYPE,pdf, $($(PDF_METHOD)template))
 133 %.pdf : %.xml
 134         $(call cmd,db2pdf)
 135
 136
 137 main_idx = Documentation/DocBook/index.html
 138 build_main_index = rm -rf $(main_idx) && \
 139                    echo '<h1>Linux Kernel HTML Documentation</h1>' >> $(main_idx) && \
 140                    echo '<h2>Kernel Version: $(KERNELVERSION)</h2>' >> $(main_idx) && \
 141                    cat $(HTML) >> $(main_idx)
 142
 143 quiet_cmd_db2html = HTML   $@
 144       cmd_db2html = xmlto xhtml $(XMLTOFLAGS) -o $(patsubst %.html,%,$@) $< && \
 145                 echo '<a HREF="$(patsubst %.html,%,$(notdir $@))/index.html"> \
 146         $(patsubst %.html,%,$(notdir $@))</a><p>' > $@
 147
 148 %.html: %.xml
 149         @(which xmlto > /dev/null 2>&1) || \
 150          (echo "*** You need to install xmlto ***"; \
 151           exit 1)
 152         @rm -rf $@ $(patsubst %.html,%,$@)
 153         $(call cmd,db2html)
 154         @if [ ! -z "$(PNG-$(basename $(notdir $@)))" ]; then \
 155             cp $(PNG-$(basename $(notdir $@))) $(patsubst %.html,%,$@); fi
 156
 157 quiet_cmd_db2man = MAN     $@
 158       cmd_db2man = if grep -q refentry $<; then xmlto man $(XMLTOFLAGS) -o $(obj)/man $< ; gzip -f $(obj)/man/*.9; fi
 159 %.9 : %.xml
 160         @(which xmlto > /dev/null 2>&1) || \
 161          (echo "*** You need to install xmlto ***"; \
 162           exit 1)
 163         $(Q)mkdir -p $(obj)/man
 164         $(call cmd,db2man)
 165         @touch $@
 166
 167 ###
 168 # Rules to generate postscripts and PNG images from .fig format files
 169 quiet_cmd_fig2eps = FIG2EPS $@
 170       cmd_fig2eps = fig2dev -Leps $< $@
 171
 172 %.eps: %.fig
 173         @(which fig2dev > /dev/null 2>&1) || \
 174          (echo "*** You need to install transfig ***"; \
 175           exit 1)
 176         $(call cmd,fig2eps)
 177
 178 quiet_cmd_fig2png = FIG2PNG $@
 179       cmd_fig2png = fig2dev -Lpng $< $@
 180
 181 %.png: %.fig
 182         @(which fig2dev > /dev/null 2>&1) || \
 183          (echo "*** You need to install transfig ***"; \
 184           exit 1)
 185         $(call cmd,fig2png)
 186
 187 ###
 188 # Rule to convert a .c file to inline XML documentation
 189 %.xml: %.c
 190         @echo '  GEN     $@'
 191         @(                            \
 192            echo "<programlisting>";   \
 193            expand --tabs=8 < $< |     \
 194            sed -e "s/&/\\&amp;/g"     \
 195                -e "s/</\\&lt;/g"      \
 196                -e "s/>/\\&gt;/g";     \
 197            echo "</programlisting>")  > $@
 198
 199 ###
 200 # Help targets as used by the top-level makefile
 201 dochelp:
 202         @echo  ' Linux kernel internal documentation in different formats:'
 203         @echo  '  htmldocs        - HTML'
 204         @echo  '  installmandocs  - install man pages generated by mandocs'
 205         @echo  '  mandocs         - man pages'
 206         @echo  '  pdfdocs         - PDF'
 207         @echo  '  psdocs          - Postscript'
 208         @echo  '  xmldocs         - XML DocBook'
 209
 210 ###
 211 # Temporary files left by various tools
 212 clean-files := $(DOCBOOKS) \
 213         $(patsubst %.xml, %.dvi,  $(DOCBOOKS)) \
 214         $(patsubst %.xml, %.aux,  $(DOCBOOKS)) \
 215         $(patsubst %.xml, %.tex,  $(DOCBOOKS)) \
 216         $(patsubst %.xml, %.log,  $(DOCBOOKS)) \
 217         $(patsubst %.xml, %.out,  $(DOCBOOKS)) \
 218         $(patsubst %.xml, %.ps,   $(DOCBOOKS)) \
 219         $(patsubst %.xml, %.pdf,  $(DOCBOOKS)) \
 220         $(patsubst %.xml, %.html, $(DOCBOOKS)) \
 221         $(patsubst %.xml, %.9,    $(DOCBOOKS)) \
 222         $(C-procfs-example)
 223
 224 clean-dirs := $(patsubst %.xml,%,$(DOCBOOKS)) man
 225
 226 # Declare the contents of the .PHONY variable as phony.  We keep that
 227 # information in a variable se we can use it in if_changed and friends.
 228
 229 .PHONY: $(PHONY)