avahi-0.6.31/common/doxygen.m4 - nest-learning-thermostat/5.1.5/avahi - Git at Google

 # This file is part of Autoconf.                       -*- Autoconf -*-

 # Copyright (C) 2004 Oren Ben-Kiki
 # This file is distributed under the same terms as the Autoconf macro files.

 # Generate automatic documentation using Doxygen. Works in concert with the
 # aminclude.m4 file and a compatible doxygen configuration file. Defines the
 # following public macros:
 #
 # DX_???_FEATURE(ON|OFF) - control the default setting fo a Doxygen feature.
 # Supported features are 'DOXYGEN' itself, 'DOT' for generating graphics,
 # 'HTML' for plain HTML, 'CHM' for compressed HTML help (for MS users), 'CHI'
 # for generating a seperate .chi file by the .chm file, and 'MAN', 'RTF',
 # 'XML', 'PDF' and 'PS' for the appropriate output formats. The environment
 # variable DOXYGEN_PAPER_SIZE may be specified to override the default 'a4wide'
 # paper size.
 #
 # By default, HTML, PDF and PS documentation is generated as this seems to be
 # the most popular and portable combination. MAN pages created by Doxygen are
 # usually problematic, though by picking an appropriate subset and doing some
 # massaging they might be better than nothing. CHM and RTF are specific for MS
 # (note that you can't generate both HTML and CHM at the same time). The XML is
 # rather useless unless you apply specialized post-processing to it.
 #
 # The macro mainly controls the default state of the feature. The use can
 # override the default by specifying --enable or --disable. The macros ensure
 # that contradictory flags are not given (e.g., --enable-doxygen-html and
 # --enable-doxygen-chm, --enable-doxygen-anything with --disable-doxygen, etc.)
 # Finally, each feature will be automatically disabled (with a warning) if the
 # required programs are missing.
 #
 # Once all the feature defaults have been specified, call DX_INIT_DOXYGEN with
 # the following parameters: a one-word name for the project for use as a
 # filename base etc., an optional configuration file name (the default is
 # 'Doxyfile', the same as Doxygen's default), and an optional output directory
 # name (the default is 'doxygen-doc').

 ## ----------##
 ## Defaults. ##
 ## ----------##

 DX_ENV=""
 AC_DEFUN([DX_FEATURE_doc],  ON)
 AC_DEFUN([DX_FEATURE_dot],  ON)
 AC_DEFUN([DX_FEATURE_man],  OFF)
 AC_DEFUN([DX_FEATURE_html], ON)
 AC_DEFUN([DX_FEATURE_chm],  OFF)
 AC_DEFUN([DX_FEATURE_chi],  OFF)
 AC_DEFUN([DX_FEATURE_rtf],  OFF)
 AC_DEFUN([DX_FEATURE_xml],  OFF)
 AC_DEFUN([DX_FEATURE_pdf],  ON)
 AC_DEFUN([DX_FEATURE_ps],   ON)

 ## --------------- ##
 ## Private macros. ##
 ## --------------- ##

 # DX_ENV_APPEND(VARIABLE, VALUE)
 # ------------------------------
 # Append VARIABLE="VALUE" to DX_ENV for invoking doxygen.
 AC_DEFUN([DX_ENV_APPEND], [AC_SUBST([DX_ENV], ["$DX_ENV $1='$2'"])])

 # DX_DIRNAME_EXPR
 # ---------------
 # Expand into a shell expression prints the directory part of a path.
 AC_DEFUN([DX_DIRNAME_EXPR],
          [[expr ".$1" : '\(\.\)[^/]*$' \| "x$1" : 'x\(.*\)/[^/]*$']])

 # DX_IF_FEATURE(FEATURE, IF-ON, IF-OFF)
 # -------------------------------------
 # Expands according to the M4 (static) status of the feature.
 AC_DEFUN([DX_IF_FEATURE], [ifelse(DX_FEATURE_$1, ON, [$2], [$3])])

 # DX_REQUIRE_PROG(VARIABLE, PROGRAM)
 # ----------------------------------
 # Require the specified program to be found for the DX_CURRENT_FEATURE to work.
 AC_DEFUN([DX_REQUIRE_PROG], [
 AC_PATH_TOOL([$1], [$2])
 if test "$DX_FLAG_[]DX_CURRENT_FEATURE$$1" = 1; then
     AC_MSG_WARN([$2 not found - will not DX_CURRENT_DESCRIPTION])
     AC_SUBST([DX_FLAG_]DX_CURRENT_FEATURE, 0)
 fi
 ])

 # DX_TEST_FEATURE(FEATURE)
 # ------------------------
 # Expand to a shell expression testing whether the feature is active.
 AC_DEFUN([DX_TEST_FEATURE], [test "$DX_FLAG_$1" = 1])

 # DX_CHECK_DEPEND(REQUIRED_FEATURE, REQUIRED_STATE)
 # -------------------------------------------------
 # Verify that a required features has the right state before trying to turn on
 # the DX_CURRENT_FEATURE.
 AC_DEFUN([DX_CHECK_DEPEND], [
 test "$DX_FLAG_$1" = "$2" \
 || AC_MSG_ERROR([doxygen-DX_CURRENT_FEATURE ifelse([$2], 1,
                             requires, contradicts) doxygen-DX_CURRENT_FEATURE])
 ])

 # DX_CLEAR_DEPEND(FEATURE, REQUIRED_FEATURE, REQUIRED_STATE)
 # ----------------------------------------------------------
 # Turn off the DX_CURRENT_FEATURE if the required feature is off.
 AC_DEFUN([DX_CLEAR_DEPEND], [
 test "$DX_FLAG_$1" = "$2" || AC_SUBST([DX_FLAG_]DX_CURRENT_FEATURE, 0)
 ])

 # DX_FEATURE_ARG(FEATURE, DESCRIPTION,
 #                CHECK_DEPEND, CLEAR_DEPEND,
 #                REQUIRE, DO-IF-ON, DO-IF-OFF)
 # --------------------------------------------
 # Parse the command-line option controlling a feature. CHECK_DEPEND is called
 # if the user explicitly turns the feature on (and invokes DX_CHECK_DEPEND),
 # otherwise CLEAR_DEPEND is called to turn off the default state if a required
 # feature is disabled (using DX_CLEAR_DEPEND). REQUIRE performs additional
 # requirement tests (DX_REQUIRE_PROG). Finally, an automake flag is set and
 # DO-IF-ON or DO-IF-OFF are called according to the final state of the feature.
 AC_DEFUN([DX_ARG_ABLE], [
     AC_DEFUN([DX_CURRENT_FEATURE], [$1])
     AC_DEFUN([DX_CURRENT_DESCRIPTION], [$2])
     AC_ARG_ENABLE(doxygen-$1,
                   [AS_HELP_STRING(DX_IF_FEATURE([$1], [--disable-doxygen-$1],
                                                       [--enable-doxygen-$1]),
                                   DX_IF_FEATURE([$1], [don't $2], [$2]))],
                   [
 case "$enableval" in
 #(
 y|Y|yes|Yes|YES)
     AC_SUBST([DX_FLAG_$1], 1)
     $3
 ;; #(
 n|N|no|No|NO)
     AC_SUBST([DX_FLAG_$1], 0)
 ;; #(
 *)
     AC_MSG_ERROR([invalid value '$enableval' given to doxygen-$1])
 ;;
 esac
 ], [
 AC_SUBST([DX_FLAG_$1], [DX_IF_FEATURE([$1], 1, 0)])
 $4
 ])
 if DX_TEST_FEATURE([$1]); then
     $5
     :
 fi
 if DX_TEST_FEATURE([$1]); then
     AM_CONDITIONAL(DX_COND_$1, :)
     $6
     :
 else
     AM_CONDITIONAL(DX_COND_$1, false)
     $7
     :
 fi
 ])

 ## -------------- ##
 ## Public macros. ##
 ## -------------- ##

 # DX_XXX_FEATURE(DEFAULT_STATE)
 # -----------------------------
 AC_DEFUN([DX_DOXYGEN_FEATURE], [AC_DEFUN([DX_FEATURE_doc],  [$1])])
 AC_DEFUN([DX_MAN_FEATURE],     [AC_DEFUN([DX_FEATURE_man],  [$1])])
 AC_DEFUN([DX_HTML_FEATURE],    [AC_DEFUN([DX_FEATURE_html], [$1])])
 AC_DEFUN([DX_CHM_FEATURE],     [AC_DEFUN([DX_FEATURE_chm],  [$1])])
 AC_DEFUN([DX_CHI_FEATURE],     [AC_DEFUN([DX_FEATURE_chi],  [$1])])
 AC_DEFUN([DX_RTF_FEATURE],     [AC_DEFUN([DX_FEATURE_rtf],  [$1])])
 AC_DEFUN([DX_XML_FEATURE],     [AC_DEFUN([DX_FEATURE_xml],  [$1])])
 AC_DEFUN([DX_XML_FEATURE],     [AC_DEFUN([DX_FEATURE_xml],  [$1])])
 AC_DEFUN([DX_PDF_FEATURE],     [AC_DEFUN([DX_FEATURE_pdf],  [$1])])
 AC_DEFUN([DX_PS_FEATURE],      [AC_DEFUN([DX_FEATURE_ps],   [$1])])

 # DX_INIT_DOXYGEN(PROJECT, [CONFIG-FILE], [OUTPUT-DOC-DIR])
 # ---------------------------------------------------------
 # PROJECT also serves as the base name for the documentation files.
 # The default CONFIG-FILE is "Doxyfile" and OUTPUT-DOC-DIR is "doxygen-doc".
 AC_DEFUN([DX_INIT_DOXYGEN], [

 # Files:
 AC_SUBST([DX_PROJECT], [$1])
 AC_SUBST([DX_CONFIG], [ifelse([$2], [], Doxyfile, [$2])])
 AC_SUBST([DX_DOCDIR], [ifelse([$3], [], doxygen-doc, [$3])])

 # Environment variables used inside doxygen.cfg:
 DX_ENV_APPEND(SRCDIR, $srcdir)
 DX_ENV_APPEND(PROJECT, $DX_PROJECT)
 DX_ENV_APPEND(DOCDIR, $DX_DOCDIR)
 DX_ENV_APPEND(VERSION, $PACKAGE_VERSION)

 # Doxygen itself:
 DX_ARG_ABLE(doc, [generate any doxygen documentation],
             [],
             [],
             [DX_REQUIRE_PROG([DX_DOXYGEN], doxygen)
              DX_REQUIRE_PROG([DX_PERL], perl)],
             [DX_ENV_APPEND(PERL_PATH, $DX_PERL)])

 # Dot for graphics:
 DX_ARG_ABLE(dot, [generate graphics for doxygen documentation],
             [DX_CHECK_DEPEND(doc, 1)],
             [DX_CLEAR_DEPEND(doc, 1)],
             [DX_REQUIRE_PROG([DX_DOT], dot)],
             [DX_ENV_APPEND(HAVE_DOT, YES)
              DX_ENV_APPEND(DOT_PATH, [`DX_DIRNAME_EXPR($DX_DOT)`])],
             [DX_ENV_APPEND(HAVE_DOT, NO)])

 # Man pages generation:
 DX_ARG_ABLE(man, [generate doxygen manual pages],
             [DX_CHECK_DEPEND(doc, 1)],
             [DX_CLEAR_DEPEND(doc, 1)],
             [],
             [DX_ENV_APPEND(GENERATE_MAN, YES)],
             [DX_ENV_APPEND(GENERATE_MAN, NO)])

 # RTF file generation:
 DX_ARG_ABLE(rtf, [generate doxygen RTF documentation],
             [DX_CHECK_DEPEND(doc, 1)],
             [DX_CLEAR_DEPEND(doc, 1)],
             [],
             [DX_ENV_APPEND(GENERATE_RTF, YES)],
             [DX_ENV_APPEND(GENERATE_RTF, NO)])

 # XML file generation:
 DX_ARG_ABLE(xml, [generate doxygen XML documentation],
             [DX_CHECK_DEPEND(doc, 1)],
             [DX_CLEAR_DEPEND(doc, 1)],
             [],
             [DX_ENV_APPEND(GENERATE_XML, YES)],
             [DX_ENV_APPEND(GENERATE_XML, NO)])

 # (Compressed) HTML help generation:
 DX_ARG_ABLE(chm, [generate doxygen compressed HTML help documentation],
             [DX_CHECK_DEPEND(doc, 1)],
             [DX_CLEAR_DEPEND(doc, 1)],
             [DX_REQUIRE_PROG([DX_HHC], hhc)],
             [DX_ENV_APPEND(HHC_PATH, $DX_HHC)
              DX_ENV_APPEND(GENERATE_HTML, YES)
              DX_ENV_APPEND(GENERATE_HTMLHELP, YES)],
             [DX_ENV_APPEND(GENERATE_HTMLHELP, NO)])

 # Seperate CHI file generation.
 DX_ARG_ABLE(chi, [generate doxygen seperate compressed HTML help index file],
             [DX_CHECK_DEPEND(chm, 1)],
             [DX_CLEAR_DEPEND(chm, 1)],
             [],
             [DX_ENV_APPEND(GENERATE_CHI, YES)],
             [DX_ENV_APPEND(GENERATE_CHI, NO)])

 # Plain HTML pages generation:
 DX_ARG_ABLE(html, [generate doxygen plain HTML documentation],
             [DX_CHECK_DEPEND(doc, 1) DX_CHECK_DEPEND(chm, 0)],
             [DX_CLEAR_DEPEND(doc, 1) DX_CLEAR_DEPEND(chm, 0)],
             [],
             [DX_ENV_APPEND(GENERATE_HTML, YES)],
             [DX_TEST_FEATURE(chm) || DX_ENV_APPEND(GENERATE_HTML, NO)])

 # PostScript file generation:
 DX_ARG_ABLE(ps, [generate doxygen PostScript documentation],
             [DX_CHECK_DEPEND(doc, 1)],
             [DX_CLEAR_DEPEND(doc, 1)],
             [DX_REQUIRE_PROG([DX_LATEX], latex)
              DX_REQUIRE_PROG([DX_MAKEINDEX], makeindex)
              DX_REQUIRE_PROG([DX_DVIPS], dvips)
              DX_REQUIRE_PROG([DX_EGREP], egrep)])

 # PDF file generation:
 DX_ARG_ABLE(pdf, [generate doxygen PDF documentation],
             [DX_CHECK_DEPEND(doc, 1)],
             [DX_CLEAR_DEPEND(doc, 1)],
             [DX_REQUIRE_PROG([DX_PDFLATEX], pdflatex)
              DX_REQUIRE_PROG([DX_MAKEINDEX], makeindex)
              DX_REQUIRE_PROG([DX_EGREP], egrep)])

 # LaTeX generation for PS and/or PDF:
 if DX_TEST_FEATURE(ps) || DX_TEST_FEATURE(pdf); then
     AM_CONDITIONAL(DX_COND_latex, :)
     DX_ENV_APPEND(GENERATE_LATEX, YES)
 else
     AM_CONDITIONAL(DX_COND_latex, false)
     DX_ENV_APPEND(GENERATE_LATEX, NO)
 fi

 # Paper size for PS and/or PDF:
 AC_ARG_VAR(DOXYGEN_PAPER_SIZE,
            [a4wide (default), a4, letter, legal or executive])
 case "$DOXYGEN_PAPER_SIZE" in
 #(
 "")
     AC_SUBST(DOXYGEN_PAPER_SIZE, "")
 ;; #(
 a4wide|a4|letter|legal|executive)
     DX_ENV_APPEND(PAPER_SIZE, $DOXYGEN_PAPER_SIZE)
 ;; #(
 *)
     AC_MSG_ERROR([unknown DOXYGEN_PAPER_SIZE='$DOXYGEN_PAPER_SIZE'])
 ;;
 esac

 #For debugging:
 #echo DX_FLAG_doc=$DX_FLAG_doc
 #echo DX_FLAG_dot=$DX_FLAG_dot
 #echo DX_FLAG_man=$DX_FLAG_man
 #echo DX_FLAG_html=$DX_FLAG_html
 #echo DX_FLAG_chm=$DX_FLAG_chm
 #echo DX_FLAG_chi=$DX_FLAG_chi
 #echo DX_FLAG_rtf=$DX_FLAG_rtf
 #echo DX_FLAG_xml=$DX_FLAG_xml
 #echo DX_FLAG_pdf=$DX_FLAG_pdf
 #echo DX_FLAG_ps=$DX_FLAG_ps
 #echo DX_ENV=$DX_ENV
 ])
	# This file is part of Autoconf. -- Autoconf --

	# Copyright (C) 2004 Oren Ben-Kiki
	# This file is distributed under the same terms as the Autoconf macro files.

	# Generate automatic documentation using Doxygen. Works in concert with the
	# aminclude.m4 file and a compatible doxygen configuration file. Defines the
	# following public macros:
	#
	# DX_???_FEATURE(ON\|OFF) - control the default setting fo a Doxygen feature.
	# Supported features are 'DOXYGEN' itself, 'DOT' for generating graphics,
	# 'HTML' for plain HTML, 'CHM' for compressed HTML help (for MS users), 'CHI'
	# for generating a seperate .chi file by the .chm file, and 'MAN', 'RTF',
	# 'XML', 'PDF' and 'PS' for the appropriate output formats. The environment
	# variable DOXYGEN_PAPER_SIZE may be specified to override the default 'a4wide'
	# paper size.
	#
	# By default, HTML, PDF and PS documentation is generated as this seems to be
	# the most popular and portable combination. MAN pages created by Doxygen are
	# usually problematic, though by picking an appropriate subset and doing some
	# massaging they might be better than nothing. CHM and RTF are specific for MS
	# (note that you can't generate both HTML and CHM at the same time). The XML is
	# rather useless unless you apply specialized post-processing to it.
	#
	# The macro mainly controls the default state of the feature. The use can
	# override the default by specifying --enable or --disable. The macros ensure
	# that contradictory flags are not given (e.g., --enable-doxygen-html and
	# --enable-doxygen-chm, --enable-doxygen-anything with --disable-doxygen, etc.)
	# Finally, each feature will be automatically disabled (with a warning) if the
	# required programs are missing.
	#
	# Once all the feature defaults have been specified, call DX_INIT_DOXYGEN with
	# the following parameters: a one-word name for the project for use as a
	# filename base etc., an optional configuration file name (the default is
	# 'Doxyfile', the same as Doxygen's default), and an optional output directory
	# name (the default is 'doxygen-doc').

	## ----------##
	## Defaults. ##
	## ----------##

	DX_ENV=""
	AC_DEFUN([DX_FEATURE_doc], ON)
	AC_DEFUN([DX_FEATURE_dot], ON)
	AC_DEFUN([DX_FEATURE_man], OFF)
	AC_DEFUN([DX_FEATURE_html], ON)
	AC_DEFUN([DX_FEATURE_chm], OFF)
	AC_DEFUN([DX_FEATURE_chi], OFF)
	AC_DEFUN([DX_FEATURE_rtf], OFF)
	AC_DEFUN([DX_FEATURE_xml], OFF)
	AC_DEFUN([DX_FEATURE_pdf], ON)
	AC_DEFUN([DX_FEATURE_ps], ON)

	## --------------- ##
	## Private macros. ##
	## --------------- ##

	# DX_ENV_APPEND(VARIABLE, VALUE)
	# ------------------------------
	# Append VARIABLE="VALUE" to DX_ENV for invoking doxygen.
	AC_DEFUN([DX_ENV_APPEND], [AC_SUBST([DX_ENV], ["$DX_ENV $1='$2'"])])

	# DX_DIRNAME_EXPR
	# ---------------
	# Expand into a shell expression prints the directory part of a path.
	AC_DEFUN([DX_DIRNAME_EXPR],
	[[expr ".$1" : '\(\.\)[^/]$' \\| "x$1" : 'x\(.\)/[^/]*$']])

	# DX_IF_FEATURE(FEATURE, IF-ON, IF-OFF)
	# -------------------------------------
	# Expands according to the M4 (static) status of the feature.
	AC_DEFUN([DX_IF_FEATURE], [ifelse(DX_FEATURE_$1, ON, [$2], [$3])])

	# DX_REQUIRE_PROG(VARIABLE, PROGRAM)
	# ----------------------------------
	# Require the specified program to be found for the DX_CURRENT_FEATURE to work.
	AC_DEFUN([DX_REQUIRE_PROG], [
	AC_PATH_TOOL([$1], [$2])
	if test "$DX_FLAG_[]DX_CURRENT_FEATURE$$1" = 1; then
	AC_MSG_WARN([$2 not found - will not DX_CURRENT_DESCRIPTION])
	AC_SUBST([DX_FLAG_]DX_CURRENT_FEATURE, 0)
	fi
	])

	# DX_TEST_FEATURE(FEATURE)
	# ------------------------
	# Expand to a shell expression testing whether the feature is active.
	AC_DEFUN([DX_TEST_FEATURE], [test "$DX_FLAG_$1" = 1])

	# DX_CHECK_DEPEND(REQUIRED_FEATURE, REQUIRED_STATE)
	# -------------------------------------------------
	# Verify that a required features has the right state before trying to turn on
	# the DX_CURRENT_FEATURE.
	AC_DEFUN([DX_CHECK_DEPEND], [
	test "$DX_FLAG_$1" = "$2" \
	\|\| AC_MSG_ERROR([doxygen-DX_CURRENT_FEATURE ifelse([$2], 1,
	requires, contradicts) doxygen-DX_CURRENT_FEATURE])
	])

	# DX_CLEAR_DEPEND(FEATURE, REQUIRED_FEATURE, REQUIRED_STATE)
	# ----------------------------------------------------------
	# Turn off the DX_CURRENT_FEATURE if the required feature is off.
	AC_DEFUN([DX_CLEAR_DEPEND], [
	test "$DX_FLAG_$1" = "$2" \|\| AC_SUBST([DX_FLAG_]DX_CURRENT_FEATURE, 0)
	])

	# DX_FEATURE_ARG(FEATURE, DESCRIPTION,
	# CHECK_DEPEND, CLEAR_DEPEND,
	# REQUIRE, DO-IF-ON, DO-IF-OFF)
	# --------------------------------------------
	# Parse the command-line option controlling a feature. CHECK_DEPEND is called
	# if the user explicitly turns the feature on (and invokes DX_CHECK_DEPEND),
	# otherwise CLEAR_DEPEND is called to turn off the default state if a required
	# feature is disabled (using DX_CLEAR_DEPEND). REQUIRE performs additional
	# requirement tests (DX_REQUIRE_PROG). Finally, an automake flag is set and
	# DO-IF-ON or DO-IF-OFF are called according to the final state of the feature.
	AC_DEFUN([DX_ARG_ABLE], [
	AC_DEFUN([DX_CURRENT_FEATURE], [$1])
	AC_DEFUN([DX_CURRENT_DESCRIPTION], [$2])
	AC_ARG_ENABLE(doxygen-$1,
	[AS_HELP_STRING(DX_IF_FEATURE([$1], [--disable-doxygen-$1],
	[--enable-doxygen-$1]),
	DX_IF_FEATURE([$1], [don't $2], [$2]))],
	[
	case "$enableval" in
	#(
	y\|Y\|yes\|Yes\|YES)
	AC_SUBST([DX_FLAG_$1], 1)
	$3
	;; #(
	n\|N\|no\|No\|NO)
	AC_SUBST([DX_FLAG_$1], 0)
	;; #(
	*)
	AC_MSG_ERROR([invalid value '$enableval' given to doxygen-$1])
	;;
	esac
	], [
	AC_SUBST([DX_FLAG_$1], [DX_IF_FEATURE([$1], 1, 0)])
	$4
	])
	if DX_TEST_FEATURE([$1]); then
	$5
	:
	fi
	if DX_TEST_FEATURE([$1]); then
	AM_CONDITIONAL(DX_COND_$1, :)
	$6
	:
	else
	AM_CONDITIONAL(DX_COND_$1, false)
	$7
	:
	fi
	])

	## -------------- ##
	## Public macros. ##
	## -------------- ##

	# DX_XXX_FEATURE(DEFAULT_STATE)
	# -----------------------------
	AC_DEFUN([DX_DOXYGEN_FEATURE], [AC_DEFUN([DX_FEATURE_doc], [$1])])
	AC_DEFUN([DX_MAN_FEATURE], [AC_DEFUN([DX_FEATURE_man], [$1])])
	AC_DEFUN([DX_HTML_FEATURE], [AC_DEFUN([DX_FEATURE_html], [$1])])
	AC_DEFUN([DX_CHM_FEATURE], [AC_DEFUN([DX_FEATURE_chm], [$1])])
	AC_DEFUN([DX_CHI_FEATURE], [AC_DEFUN([DX_FEATURE_chi], [$1])])
	AC_DEFUN([DX_RTF_FEATURE], [AC_DEFUN([DX_FEATURE_rtf], [$1])])
	AC_DEFUN([DX_XML_FEATURE], [AC_DEFUN([DX_FEATURE_xml], [$1])])
	AC_DEFUN([DX_XML_FEATURE], [AC_DEFUN([DX_FEATURE_xml], [$1])])
	AC_DEFUN([DX_PDF_FEATURE], [AC_DEFUN([DX_FEATURE_pdf], [$1])])
	AC_DEFUN([DX_PS_FEATURE], [AC_DEFUN([DX_FEATURE_ps], [$1])])

	# DX_INIT_DOXYGEN(PROJECT, [CONFIG-FILE], [OUTPUT-DOC-DIR])
	# ---------------------------------------------------------
	# PROJECT also serves as the base name for the documentation files.
	# The default CONFIG-FILE is "Doxyfile" and OUTPUT-DOC-DIR is "doxygen-doc".
	AC_DEFUN([DX_INIT_DOXYGEN], [

	# Files:
	AC_SUBST([DX_PROJECT], [$1])
	AC_SUBST([DX_CONFIG], [ifelse([$2], [], Doxyfile, [$2])])
	AC_SUBST([DX_DOCDIR], [ifelse([$3], [], doxygen-doc, [$3])])

	# Environment variables used inside doxygen.cfg:
	DX_ENV_APPEND(SRCDIR, $srcdir)
	DX_ENV_APPEND(PROJECT, $DX_PROJECT)
	DX_ENV_APPEND(DOCDIR, $DX_DOCDIR)
	DX_ENV_APPEND(VERSION, $PACKAGE_VERSION)

	# Doxygen itself:
	DX_ARG_ABLE(doc, [generate any doxygen documentation],
	[],
	[],
	[DX_REQUIRE_PROG([DX_DOXYGEN], doxygen)
	DX_REQUIRE_PROG([DX_PERL], perl)],
	[DX_ENV_APPEND(PERL_PATH, $DX_PERL)])

	# Dot for graphics:
	DX_ARG_ABLE(dot, [generate graphics for doxygen documentation],
	[DX_CHECK_DEPEND(doc, 1)],
	[DX_CLEAR_DEPEND(doc, 1)],
	[DX_REQUIRE_PROG([DX_DOT], dot)],
	[DX_ENV_APPEND(HAVE_DOT, YES)
	DX_ENV_APPEND(DOT_PATH, [`DX_DIRNAME_EXPR($DX_DOT)`])],
	[DX_ENV_APPEND(HAVE_DOT, NO)])

	# Man pages generation:
	DX_ARG_ABLE(man, [generate doxygen manual pages],
	[DX_CHECK_DEPEND(doc, 1)],
	[DX_CLEAR_DEPEND(doc, 1)],
	[],
	[DX_ENV_APPEND(GENERATE_MAN, YES)],
	[DX_ENV_APPEND(GENERATE_MAN, NO)])

	# RTF file generation:
	DX_ARG_ABLE(rtf, [generate doxygen RTF documentation],
	[DX_CHECK_DEPEND(doc, 1)],
	[DX_CLEAR_DEPEND(doc, 1)],
	[],
	[DX_ENV_APPEND(GENERATE_RTF, YES)],
	[DX_ENV_APPEND(GENERATE_RTF, NO)])

	# XML file generation:
	DX_ARG_ABLE(xml, [generate doxygen XML documentation],
	[DX_CHECK_DEPEND(doc, 1)],
	[DX_CLEAR_DEPEND(doc, 1)],
	[],
	[DX_ENV_APPEND(GENERATE_XML, YES)],
	[DX_ENV_APPEND(GENERATE_XML, NO)])

	# (Compressed) HTML help generation:
	DX_ARG_ABLE(chm, [generate doxygen compressed HTML help documentation],
	[DX_CHECK_DEPEND(doc, 1)],
	[DX_CLEAR_DEPEND(doc, 1)],
	[DX_REQUIRE_PROG([DX_HHC], hhc)],
	[DX_ENV_APPEND(HHC_PATH, $DX_HHC)
	DX_ENV_APPEND(GENERATE_HTML, YES)
	DX_ENV_APPEND(GENERATE_HTMLHELP, YES)],
	[DX_ENV_APPEND(GENERATE_HTMLHELP, NO)])

	# Seperate CHI file generation.
	DX_ARG_ABLE(chi, [generate doxygen seperate compressed HTML help index file],
	[DX_CHECK_DEPEND(chm, 1)],
	[DX_CLEAR_DEPEND(chm, 1)],
	[],
	[DX_ENV_APPEND(GENERATE_CHI, YES)],
	[DX_ENV_APPEND(GENERATE_CHI, NO)])

	# Plain HTML pages generation:
	DX_ARG_ABLE(html, [generate doxygen plain HTML documentation],
	[DX_CHECK_DEPEND(doc, 1) DX_CHECK_DEPEND(chm, 0)],
	[DX_CLEAR_DEPEND(doc, 1) DX_CLEAR_DEPEND(chm, 0)],
	[],
	[DX_ENV_APPEND(GENERATE_HTML, YES)],
	[DX_TEST_FEATURE(chm) \|\| DX_ENV_APPEND(GENERATE_HTML, NO)])

	# PostScript file generation:
	DX_ARG_ABLE(ps, [generate doxygen PostScript documentation],
	[DX_CHECK_DEPEND(doc, 1)],
	[DX_CLEAR_DEPEND(doc, 1)],
	[DX_REQUIRE_PROG([DX_LATEX], latex)
	DX_REQUIRE_PROG([DX_MAKEINDEX], makeindex)
	DX_REQUIRE_PROG([DX_DVIPS], dvips)
	DX_REQUIRE_PROG([DX_EGREP], egrep)])

	# PDF file generation:
	DX_ARG_ABLE(pdf, [generate doxygen PDF documentation],
	[DX_CHECK_DEPEND(doc, 1)],
	[DX_CLEAR_DEPEND(doc, 1)],
	[DX_REQUIRE_PROG([DX_PDFLATEX], pdflatex)
	DX_REQUIRE_PROG([DX_MAKEINDEX], makeindex)
	DX_REQUIRE_PROG([DX_EGREP], egrep)])

	# LaTeX generation for PS and/or PDF:
	if DX_TEST_FEATURE(ps) \|\| DX_TEST_FEATURE(pdf); then
	AM_CONDITIONAL(DX_COND_latex, :)
	DX_ENV_APPEND(GENERATE_LATEX, YES)
	else
	AM_CONDITIONAL(DX_COND_latex, false)
	DX_ENV_APPEND(GENERATE_LATEX, NO)
	fi

	# Paper size for PS and/or PDF:
	AC_ARG_VAR(DOXYGEN_PAPER_SIZE,
	[a4wide (default), a4, letter, legal or executive])
	case "$DOXYGEN_PAPER_SIZE" in
	#(
	"")
	AC_SUBST(DOXYGEN_PAPER_SIZE, "")
	;; #(
	a4wide\|a4\|letter\|legal\|executive)
	DX_ENV_APPEND(PAPER_SIZE, $DOXYGEN_PAPER_SIZE)
	;; #(
	*)
	AC_MSG_ERROR([unknown DOXYGEN_PAPER_SIZE='$DOXYGEN_PAPER_SIZE'])
	;;
	esac

	#For debugging:
	#echo DX_FLAG_doc=$DX_FLAG_doc
	#echo DX_FLAG_dot=$DX_FLAG_dot
	#echo DX_FLAG_man=$DX_FLAG_man
	#echo DX_FLAG_html=$DX_FLAG_html
	#echo DX_FLAG_chm=$DX_FLAG_chm
	#echo DX_FLAG_chi=$DX_FLAG_chi
	#echo DX_FLAG_rtf=$DX_FLAG_rtf
	#echo DX_FLAG_xml=$DX_FLAG_xml
	#echo DX_FLAG_pdf=$DX_FLAG_pdf
	#echo DX_FLAG_ps=$DX_FLAG_ps
	#echo DX_ENV=$DX_ENV
	])