doc/DocBook/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2 ###
   3 # This makefile is used to generate the kernel documentation,
   4 # primarily based on in-line comments in various source files.
   5 # See Documentation/kernel-doc-nano-HOWTO.txt for instruction in how
   6 # to document the SRC - and how to read it.
   7 # To add a new book the only step required is to add the book to the
   8 # list of DOCBOOKS.
   9
  10 DOCBOOKS := linker_lists.xml stdio.xml
  11
  12 ###
  13 # The build process is as follows (targets):
  14 #              (xmldocs) [by docproc]
  15 # file.tmpl --> file.xml +--> file.ps   (psdocs)   [by db2ps or xmlto]
  16 #                        +--> file.pdf  (pdfdocs)  [by db2pdf or xmlto]
  17 #                        +--> DIR=file  (htmldocs) [by xmlto]
  18 #                        +--> man/      (mandocs)  [by xmlto]
  19
  20
  21 # for PDF and PS output you can choose between xmlto and docbook-utils tools
  22 PDF_METHOD      = $(prefer-db2x)
  23 PS_METHOD       = $(prefer-db2x)
  24
  25
  26 ###
  27 # The targets that may be used.
  28 PHONY += xmldocs sgmldocs psdocs pdfdocs htmldocs mandocs installmandocs cleandocs
  29
  30 targets += $(DOCBOOKS)
  31 BOOKS := $(addprefix $(obj)/,$(DOCBOOKS))
  32 xmldocs: $(BOOKS)
  33 sgmldocs: xmldocs
  34
  35 PS := $(patsubst %.xml, %.ps, $(BOOKS))
  36 psdocs: $(PS)
  37
  38 PDF := $(patsubst %.xml, %.pdf, $(BOOKS))
  39 pdfdocs: $(PDF)
  40
  41 HTML := $(sort $(patsubst %.xml, %.html, $(BOOKS)))
  42 htmldocs: $(HTML)
  43         $(call build_main_index)
  44         $(call build_images)
  45         $(call install_media_images)
  46
  47 MAN := $(patsubst %.xml, %.9, $(BOOKS))
  48 mandocs: $(MAN)
  49         $(if $(wildcard $(obj)/man/*.9),gzip -f $(obj)/man/*.9)
  50
  51 installmandocs: mandocs
  52         mkdir -p /usr/local/man/man9/
  53         install $(obj)/man/*.9.gz /usr/local/man/man9/
  54
  55 ###
  56 #External programs used
  57 KERNELDOC = $(srctree)/scripts/kernel-doc
  58 DOCPROC   = $(objtree)/scripts/docproc
  59
  60 XMLTOFLAGS = -m $(srctree)/$(src)/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 $(KERNELDOC) $(DOCPROC) FORCE
  83         $(call if_changed_rule,docproc)
  84
  85 # Tell kbuild to always build the programs
  86 always := $(hostprogs-y)
  87
  88 notfoundtemplate = echo "*** You have to install docbook-utils or xmlto ***"; \
  89                    exit 1
  90 db2xtemplate = db2TYPE -o $(dir $@) $<
  91 xmltotemplate = xmlto TYPE $(XMLTOFLAGS) -o $(dir $@) $<
  92
  93 # determine which methods are available
  94 ifeq ($(shell which db2ps >/dev/null 2>&1 && echo found),found)
  95         use-db2x = db2x
  96         prefer-db2x = db2x
  97 else
  98         use-db2x = notfound
  99         prefer-db2x = $(use-xmlto)
 100 endif
 101 ifeq ($(shell which xmlto >/dev/null 2>&1 && echo found),found)
 102         use-xmlto = xmlto
 103         prefer-xmlto = xmlto
 104 else
 105         use-xmlto = notfound
 106         prefer-xmlto = $(use-db2x)
 107 endif
 108
 109 # the commands, generated from the chosen template
 110 quiet_cmd_db2ps = PS      $@
 111       cmd_db2ps = $(subst TYPE,ps, $($(PS_METHOD)template))
 112 %.ps : %.xml
 113         $(call cmd,db2ps)
 114
 115 quiet_cmd_db2pdf = PDF     $@
 116       cmd_db2pdf = $(subst TYPE,pdf, $($(PDF_METHOD)template))
 117 %.pdf : %.xml
 118         $(call cmd,db2pdf)
 119
 120
 121 index = index.html
 122 main_idx = $(obj)/$(index)
 123 build_main_index = rm -rf $(main_idx); \
 124                    echo '<h1>U-Boot Bootloader HTML Documentation</h1>' >> $(main_idx) && \
 125                    echo '<h2>U-Boot Version: $(UBOOTVERSION)</h2>' >> $(main_idx) && \
 126                    cat $(HTML) >> $(main_idx)
 127
 128 quiet_cmd_db2html = HTML    $@
 129       cmd_db2html = xmlto html $(XMLTOFLAGS) -o $(patsubst %.html,%,$@) $< && \
 130                 echo '<a HREF="$(patsubst %.html,%,$(notdir $@))/index.html"> \
 131                 $(patsubst %.html,%,$(notdir $@))</a><p>' > $@
 132
 133 %.html: %.xml
 134         @(which xmlto > /dev/null 2>&1) || \
 135          (echo "*** You need to install xmlto ***"; \
 136           exit 1)
 137         @rm -rf $@ $(patsubst %.html,%,$@)
 138         $(call cmd,db2html)
 139         @if [ ! -z "$(PNG-$(basename $(notdir $@)))" ]; then \
 140             cp $(PNG-$(basename $(notdir $@))) $(patsubst %.html,%,$@); fi
 141
 142 quiet_cmd_db2man = MAN     $@
 143       cmd_db2man = if grep -q refentry $<; then xmlto man $(XMLTOFLAGS) -o $(obj)/man $< ; fi
 144 %.9 : %.xml
 145         @(which xmlto > /dev/null 2>&1) || \
 146          (echo "*** You need to install xmlto ***"; \
 147           exit 1)
 148         $(Q)mkdir -p $(obj)/man
 149         $(call cmd,db2man)
 150         @touch $@
 151
 152 ###
 153 # Rules to generate postscripts and PNG images from .fig format files
 154 quiet_cmd_fig2eps = FIG2EPS $@
 155       cmd_fig2eps = fig2dev -Leps $< $@
 156
 157 %.eps: %.fig
 158         @(which fig2dev > /dev/null 2>&1) || \
 159          (echo "*** You need to install transfig ***"; \
 160           exit 1)
 161         $(call cmd,fig2eps)
 162
 163 quiet_cmd_fig2png = FIG2PNG $@
 164       cmd_fig2png = fig2dev -Lpng $< $@
 165
 166 %.png: %.fig
 167         @(which fig2dev > /dev/null 2>&1) || \
 168          (echo "*** You need to install transfig ***"; \
 169           exit 1)
 170         $(call cmd,fig2png)
 171
 172 ###
 173 # Rule to convert a .c file to inline XML documentation
 174        gen_xml = :
 175  quiet_gen_xml = echo '  GEN     $@'
 176 silent_gen_xml = :
 177 %.xml: %.c
 178         @$($(quiet)gen_xml)
 179         @(                            \
 180            echo "<programlisting>";   \
 181            expand --tabs=8 < $< |     \
 182            sed -e "s/&/\\&amp;/g"     \
 183                -e "s/</\\&lt;/g"      \
 184                -e "s/>/\\&gt;/g";     \
 185            echo "</programlisting>")  > $@
 186
 187 ###
 188 # Help targets as used by the top-level makefile
 189 dochelp:
 190         @echo  ' U-Boot bootloader internal documentation in different formats:'
 191         @echo  '  htmldocs        - HTML'
 192         @echo  '  pdfdocs         - PDF'
 193         @echo  '  psdocs          - Postscript'
 194         @echo  '  xmldocs         - XML DocBook'
 195         @echo  '  mandocs         - man pages'
 196         @echo  '  installmandocs  - install man pages generated by mandocs'
 197         @echo  '  cleandocs       - clean all generated DocBook files'
 198
 199 ###
 200 # Temporary files left by various tools
 201 clean-files := $(DOCBOOKS) \
 202         $(patsubst %.xml, %.dvi,  $(DOCBOOKS)) \
 203         $(patsubst %.xml, %.aux,  $(DOCBOOKS)) \
 204         $(patsubst %.xml, %.tex,  $(DOCBOOKS)) \
 205         $(patsubst %.xml, %.log,  $(DOCBOOKS)) \
 206         $(patsubst %.xml, %.out,  $(DOCBOOKS)) \
 207         $(patsubst %.xml, %.ps,   $(DOCBOOKS)) \
 208         $(patsubst %.xml, %.pdf,  $(DOCBOOKS)) \
 209         $(patsubst %.xml, %.html, $(DOCBOOKS)) \
 210         $(patsubst %.xml, %.9,    $(DOCBOOKS)) \
 211         $(index)
 212
 213 clean-dirs := $(patsubst %.xml,%,$(DOCBOOKS)) man
 214
 215 cleandocs:
 216         $(Q)rm -f $(call objectify, $(clean-files))
 217         $(Q)rm -rf $(call objectify, $(clean-dirs))
 218
 219 # Declare the contents of the .PHONY variable as phony.  We keep that
 220 # information in a variable se we can use it in if_changed and friends.
 221
 222 .PHONY: $(PHONY)