###
# This makefile is used to generate the kernel documentation,
# primarily based on in-line comments in various source files.
# See Documentation/kernel-doc-nano-HOWTO.txt for instruction in how
# to document the SRC - and how to read it.
# To add a new book the only step required is to add the book to the
# list of DOCBOOKS.
DOCBOOKS := wanbook.xml z8530book.xml mcabook.xml videobook.xml \
kernel-hacking.xml kernel-locking.xml deviceiobook.xml \
procfs-guide.xml writing_usb_driver.xml \
kernel-api.xml journal-api.xml lsm.xml usb.xml \
gadget.xml libata.xml mtdnand.xml librs.xml rapidio.xml
###
# The build process is as follows (targets):
# (xmldocs)
# file.tmpl --> file.xml +--> file.ps (psdocs)
# +--> file.pdf (pdfdocs)
# +--> DIR=file (htmldocs)
# +--> man/ (mandocs)
# for PDF and PS output you can choose between xmlto and docbook-utils tools
PDF_METHOD = $(prefer-db2x)
PS_METHOD = $(prefer-db2x)
###
# The targets that may be used.
PHONY += xmldocs sgmldocs psdocs pdfdocs htmldocs mandocs installmandocs
BOOKS := $(addprefix $(obj)/,$(DOCBOOKS))
xmldocs: $(BOOKS)
sgmldocs: xmldocs
PS := $(patsubst %.xml, %.ps, $(BOOKS))
psdocs: $(PS)
PDF := $(patsubst %.xml, %.pdf, $(BOOKS))
pdfdocs: $(PDF)
HTML := $(patsubst %.xml, %.html, $(BOOKS))
htmldocs: $(HTML)
MAN := $(patsubst %.xml, %.9, $(BOOKS))
mandocs: $(MAN)
installmandocs: mandocs
mkdir -p /usr/local/man/man9/
install Documentation/DocBook/man/*.9.gz /usr/local/man/man9/
###
#External programs used
KERNELDOC = scripts/kernel-doc
DOCPROC = scripts/basic/docproc
XMLTOFLAGS = -m $(srctree)/Documentation/DocBook/stylesheet.xsl
#XMLTOFLAGS += --skip-validation
###
# DOCPROC is used for two purposes:
# 1) To generate a dependency list for a .tmpl file
# 2) To preprocess a .tmpl file and call kernel-doc with
# appropriate parameters.
# The following rules are used to generate the .xml documentation
# required to generate the final targets. (ps, pdf, html).
quiet_cmd_docproc = DOCPROC $@
cmd_docproc = SRCTREE=$(srctree)/ $(DOCPROC) doc $< >$@
define rule_docproc
set -e; \
$(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))';) \
$(cmd_$(1)); \
( \
echo 'cmd_$@ := $(cmd_$(1))'; \
echo $@: `SRCTREE=$(srctree) $(DOCPROC) depend $<`; \
) > $(dir $@).$(notdir $@).cmd
endef
%.xml: %.tmpl FORCE
$(call if_changed_rule,docproc)
###
#Read in all saved dependency files
cmd_files := $(wildcard $(foreach f,$(BOOKS),$(dir $(f)).$(notdir $(f)).cmd))
ifneq ($(cmd_files),)
include $(cmd_files)
endif
###
# Changes in kernel-doc force a rebuild of all documentation
$(BOOKS): $(KERNELDOC)
###
# procfs guide uses a .c file as example code.
# This requires an explicit dependency
C-procfs-example = procfs_example.xml
C-procfs-example2 = $(addprefix $(obj)/,$(C-procfs-example))
$(obj)/procfs-guide.xml: $(C-procfs-example2)
notfoundtemplate = echo "*** You have to install docbook-utils or xmlto ***"; \
exit 1
db2xtemplate = db2TYPE -o $(dir $@) $<
xmltotemplate = xmlto TYPE $(XMLTOFLAGS) -o $(dir $@) $<
# determine which methods are available
ifeq ($(shell which db2ps >/dev/null 2>&1 && echo found),found)
use-db2x = db2x
prefer-db2x = db2x
else
use-db2x = notfound
prefer-db2x = $(use-xmlto)
endif
ifeq ($(shell which xmlto >/dev/null 2>&1 && echo found),found)
use-xmlto = xmlto
prefer-xmlto = xmlto
else
use-xmlto = notfound
prefer-xmlto = $(use-db2x)
endif
# the commands, generated from the chosen template
quiet_cmd_db2ps = PS $@
cmd_db2ps = $(subst TYPE,ps, $($(PS_METHOD)template))
%.ps : %.xml
$(call cmd,db2ps)
quiet_cmd_db2pdf = PDF $@
cmd_db2pdf = $(subst TYPE,pdf, $($(PDF_METHOD)template))
%.pdf : %.xml
$(call cmd,db2pdf)
quiet_cmd_db2html = HTML $@
cmd_db2html = xmlto xhtml $(XMLTOFLAGS) -o $(patsubst %.html,%,$@) $< && \
echo '<a HREF="$(patsubst %.html,%,$(notdir $@))/index.html"> \
Goto $(patsubst %.html,%,$(notdir $@))</a><p>' > $@
%.html: %.xml
@(which xmlto > /dev/null 2>&1) || \
(echo "*** You need to install xmlto ***"; \
exit 1)
@rm -rf $@ $(patsubst %.html,%,$@)
$(call cmd,db2html)
@if [ ! -z "$(PNG-$(basename $(notdir $@)))" ]; then \
cp $(PNG-$(basename $(notdir $@))) $(patsubst %.html,%,$@); fi
quiet_cmd_db2man = MAN $@
cmd_db2man = if grep -q refentry $<; then xmlto man $(XMLTOFLAGS) -o $(obj)/man $< ; gzip -f $(obj)/man/*.9; fi
%.9 : %.xml
@(which xmlto > /dev/null 2>&1) || \
(echo "*** You need to install xmlto ***"; \
exit 1)
$(call cmd,db2man)
@touch $@
###
# Rules to generate postscripts and PNG imgages from .fig format files
quiet_cmd_fig2eps = FIG2EPS $@
cmd_fig2eps = fig2dev -Leps $< $@
%.eps: %.fig
@(which fig2dev > /dev/null 2>&1) || \
(echo "*** You need to install transfig ***"; \
exit 1)
$(call cmd,fig2eps)
quiet_cmd_fig2png = FIG2PNG $@
cmd_fig2png = fig2dev -Lpng $< $@
%.png: %.fig
@(which fig2dev > /dev/null 2>&1) || \
(echo "*** You need to install transfig ***"; \
exit 1)
$(call cmd,fig2png)
###
# Rule to convert a .c file to inline XML documentation
%.xml: %.c
@echo ' GEN $@'
@( \
echo "<programlisting>"; \
expand --tabs=8 < $< | \
sed -e "s/&/\\&/g" \
-e "s/</\\</g" \
-e "s/>/\\>/g"; \
echo "</programlisting>") > $@
###
# Help targets as used by the top-level makefile
dochelp:
@echo ' Linux kernel internal documentation in different formats:'
@echo ' xmldocs (XML DocBook), psdocs (Postscript), pdfdocs (PDF)'
@echo ' htmldocs (HTML), mandocs (man pages, use installmandocs to install)'
###
# Temporary files left by various tools
clean-files := $(DOCBOOKS) \
$(patsubst %.xml, %.dvi, $(DOCBOOKS)) \
$(patsubst %.xml, %.aux, $(DOCBOOKS)) \
$(patsubst %.xml, %.tex, $(DOCBOOKS)) \
$(patsubst %.xml, %.log, $(DOCBOOKS)) \
$(patsubst %.xml, %.out, $(DOCBOOKS)) \
$(patsubst %.xml, %.ps, $(DOCBOOKS)) \
$(patsubst %.xml, %.pdf, $(DOCBOOKS)) \
$(patsubst %.xml, %.html, $(DOCBOOKS)) \
$(patsubst %.xml, %.9, $(DOCBOOKS)) \
$(C-procfs-example)
clean-dirs := $(patsubst %.xml,%,$(DOCBOOKS))
#man put files in man subdir - traverse down
subdir- := man/
# Declare the contents of the .PHONY variable as phony. We keep that
# information in a variable se we can use it in if_changed and friends.
.PHONY: $(PHONY)
