xref: /xsrc/external/mit/xset/dist/aclocal.m4

# generated automatically by aclocal 1.15 -*- Autoconf -*-

# Copyright (C) 1996-2014 Free Software Foundation, Inc.

# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
# PARTICULAR PURPOSE.

m4_ifndef([AC_CONFIG_MACRO_DIRS], [m4_defun([_AM_CONFIG_MACRO_DIRS], [])m4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])])
m4_ifndef([AC_AUTOCONF_VERSION],
  [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl
m4_if(m4_defn([AC_AUTOCONF_VERSION]), [2.69],,
[m4_warning([this file was generated for autoconf 2.69.
You have another version of autoconf.  It may work, but is not guaranteed to.
If you have problems, you may need to regenerate the build system entirely.
To do so, use the procedure documented by the package, typically 'autoreconf'.])])

dnl pkg.m4 - Macros to locate and utilise pkg-config.   -*- Autoconf -*-
dnl serial 11 (pkg-config-0.29)
dnl
dnl Copyright © 2004 Scott James Remnant <scott@netsplit.com>.
dnl Copyright © 2012-2015 Dan Nicholson <dbn.lists@gmail.com>
dnl
dnl This program is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
dnl the Free Software Foundation; either version 2 of the License, or
dnl (at your option) any later version.
dnl
dnl This program is distributed in the hope that it will be useful, but
dnl WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
dnl General Public License for more details.
dnl
dnl You should have received a copy of the GNU General Public License
dnl along with this program; if not, write to the Free Software
dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
dnl 02111-1307, USA.
dnl
dnl As a special exception to the GNU General Public License, if you
dnl distribute this file as part of a program that contains a
dnl configuration script generated by Autoconf, you may include it under
dnl the same distribution terms that you use for the rest of that
dnl program.

dnl PKG_PREREQ(MIN-VERSION)
dnl -----------------------
dnl Since: 0.29
dnl
dnl Verify that the version of the pkg-config macros are at least
dnl MIN-VERSION. Unlike PKG_PROG_PKG_CONFIG, which checks the user's
dnl installed version of pkg-config, this checks the developer's version
dnl of pkg.m4 when generating configure.
dnl
dnl To ensure that this macro is defined, also add:
dnl m4_ifndef([PKG_PREREQ],
dnl     [m4_fatal([must install pkg-config 0.29 or later before running autoconf/autogen])])
dnl
dnl See the "Since" comment for each macro you use to see what version
dnl of the macros you require.
m4_defun([PKG_PREREQ],
[m4_define([PKG_MACROS_VERSION], [0.29])
m4_if(m4_version_compare(PKG_MACROS_VERSION, [$1]), -1,
    [m4_fatal([pkg.m4 version $1 or higher is required but ]PKG_MACROS_VERSION[ found])])
])dnl PKG_PREREQ

dnl PKG_PROG_PKG_CONFIG([MIN-VERSION])
dnl ----------------------------------
dnl Since: 0.16
dnl
dnl Search for the pkg-config tool and set the PKG_CONFIG variable to
dnl first found in the path. Checks that the version of pkg-config found
dnl is at least MIN-VERSION. If MIN-VERSION is not specified, 0.9.0 is
dnl used since that's the first version where most current features of
dnl pkg-config existed.
AC_DEFUN([PKG_PROG_PKG_CONFIG],
[m4_pattern_forbid([^_?PKG_[A-Z_]+$])
m4_pattern_allow([^PKG_CONFIG(_(PATH|LIBDIR|SYSROOT_DIR|ALLOW_SYSTEM_(CFLAGS|LIBS)))?$])
m4_pattern_allow([^PKG_CONFIG_(DISABLE_UNINSTALLED|TOP_BUILD_DIR|DEBUG_SPEW)$])
AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])
AC_ARG_VAR([PKG_CONFIG_PATH], [directories to add to pkg-config's search path])
AC_ARG_VAR([PKG_CONFIG_LIBDIR], [path overriding pkg-config's built-in search path])

if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
	AC_PATH_TOOL([PKG_CONFIG], [pkg-config])
fi
if test -n "$PKG_CONFIG"; then
	_pkg_min_version=m4_default([$1], [0.9.0])
	AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version])
	if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
		AC_MSG_RESULT([yes])
	else
		AC_MSG_RESULT([no])
		PKG_CONFIG=""
	fi
fi[]dnl
])dnl PKG_PROG_PKG_CONFIG

dnl PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
dnl -------------------------------------------------------------------
dnl Since: 0.18
dnl
dnl Check to see whether a particular set of modules exists. Similar to
dnl PKG_CHECK_MODULES(), but does not set variables or print errors.
dnl
dnl Please remember that m4 expands AC_REQUIRE([PKG_PROG_PKG_CONFIG])
dnl only at the first occurence in configure.ac, so if the first place
dnl it's called might be skipped (such as if it is within an "if", you
dnl have to call PKG_CHECK_EXISTS manually
AC_DEFUN([PKG_CHECK_EXISTS],
[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
if test -n "$PKG_CONFIG" && \
    AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then
  m4_default([$2], [:])
m4_ifvaln([$3], [else
  $3])dnl
fi])

dnl _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES])
dnl ---------------------------------------------
dnl Internal wrapper calling pkg-config via PKG_CONFIG and setting
dnl pkg_failed based on the result.
m4_define([_PKG_CONFIG],
[if test -n "$$1"; then
    pkg_cv_[]$1="$$1"
 elif test -n "$PKG_CONFIG"; then
    PKG_CHECK_EXISTS([$3],
                     [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`
		      test "x$?" != "x0" && pkg_failed=yes ],
		     [pkg_failed=yes])
 else
    pkg_failed=untried
fi[]dnl
])dnl _PKG_CONFIG

dnl _PKG_SHORT_ERRORS_SUPPORTED
dnl ---------------------------
dnl Internal check to see if pkg-config supports short errors.
AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED],
[AC_REQUIRE([PKG_PROG_PKG_CONFIG])
if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
        _pkg_short_errors_supported=yes
else
        _pkg_short_errors_supported=no
fi[]dnl
])dnl _PKG_SHORT_ERRORS_SUPPORTED


dnl PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
dnl   [ACTION-IF-NOT-FOUND])
dnl --------------------------------------------------------------
dnl Since: 0.4.0
dnl
dnl Note that if there is a possibility the first call to
dnl PKG_CHECK_MODULES might not happen, you should be sure to include an
dnl explicit call to PKG_PROG_PKG_CONFIG in your configure.ac
AC_DEFUN([PKG_CHECK_MODULES],
[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl
AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl

pkg_failed=no
AC_MSG_CHECKING([for $1])

_PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
_PKG_CONFIG([$1][_LIBS], [libs], [$2])

m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS
and $1[]_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.])

if test $pkg_failed = yes; then
   	AC_MSG_RESULT([no])
        _PKG_SHORT_ERRORS_SUPPORTED
        if test $_pkg_short_errors_supported = yes; then
	        $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "$2" 2>&1`
        else 
	        $1[]_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "$2" 2>&1`
        fi
	# Put the nasty error message in config.log where it belongs
	echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD

	m4_default([$4], [AC_MSG_ERROR(
[Package requirements ($2) were not met:

$$1_PKG_ERRORS

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

_PKG_TEXT])[]dnl
        ])
elif test $pkg_failed = untried; then
     	AC_MSG_RESULT([no])
	m4_default([$4], [AC_MSG_FAILURE(
[The pkg-config script could not be found or is too old.  Make sure it
is in your PATH or set the PKG_CONFIG environment variable to the full
path to pkg-config.

_PKG_TEXT

To get pkg-config, see <http://pkg-config.freedesktop.org/>.])[]dnl
        ])
else
	$1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS
	$1[]_LIBS=$pkg_cv_[]$1[]_LIBS
        AC_MSG_RESULT([yes])
	$3
fi[]dnl
])dnl PKG_CHECK_MODULES


dnl PKG_CHECK_MODULES_STATIC(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
dnl   [ACTION-IF-NOT-FOUND])
dnl ---------------------------------------------------------------------
dnl Since: 0.29
dnl
dnl Checks for existence of MODULES and gathers its build flags with
dnl static libraries enabled. Sets VARIABLE-PREFIX_CFLAGS from --cflags
dnl and VARIABLE-PREFIX_LIBS from --libs.
dnl
dnl Note that if there is a possibility the first call to
dnl PKG_CHECK_MODULES_STATIC might not happen, you should be sure to
dnl include an explicit call to PKG_PROG_PKG_CONFIG in your
dnl configure.ac.
AC_DEFUN([PKG_CHECK_MODULES_STATIC],
[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
_save_PKG_CONFIG=$PKG_CONFIG
PKG_CONFIG="$PKG_CONFIG --static"
PKG_CHECK_MODULES($@)
PKG_CONFIG=$_save_PKG_CONFIG[]dnl
])dnl PKG_CHECK_MODULES_STATIC


dnl PKG_INSTALLDIR([DIRECTORY])
dnl -------------------------
dnl Since: 0.27
dnl
dnl Substitutes the variable pkgconfigdir as the location where a module
dnl should install pkg-config .pc files. By default the directory is
dnl $libdir/pkgconfig, but the default can be changed by passing
dnl DIRECTORY. The user can override through the --with-pkgconfigdir
dnl parameter.
AC_DEFUN([PKG_INSTALLDIR],
[m4_pushdef([pkg_default], [m4_default([$1], ['${libdir}/pkgconfig'])])
m4_pushdef([pkg_description],
    [pkg-config installation directory @<:@]pkg_default[@:>@])
AC_ARG_WITH([pkgconfigdir],
    [AS_HELP_STRING([--with-pkgconfigdir], pkg_description)],,
    [with_pkgconfigdir=]pkg_default)
AC_SUBST([pkgconfigdir], [$with_pkgconfigdir])
m4_popdef([pkg_default])
m4_popdef([pkg_description])
])dnl PKG_INSTALLDIR


dnl PKG_NOARCH_INSTALLDIR([DIRECTORY])
dnl --------------------------------
dnl Since: 0.27
dnl
dnl Substitutes the variable noarch_pkgconfigdir as the location where a
dnl module should install arch-independent pkg-config .pc files. By
dnl default the directory is $datadir/pkgconfig, but the default can be
dnl changed by passing DIRECTORY. The user can override through the
dnl --with-noarch-pkgconfigdir parameter.
AC_DEFUN([PKG_NOARCH_INSTALLDIR],
[m4_pushdef([pkg_default], [m4_default([$1], ['${datadir}/pkgconfig'])])
m4_pushdef([pkg_description],
    [pkg-config arch-independent installation directory @<:@]pkg_default[@:>@])
AC_ARG_WITH([noarch-pkgconfigdir],
    [AS_HELP_STRING([--with-noarch-pkgconfigdir], pkg_description)],,
    [with_noarch_pkgconfigdir=]pkg_default)
AC_SUBST([noarch_pkgconfigdir], [$with_noarch_pkgconfigdir])
m4_popdef([pkg_default])
m4_popdef([pkg_description])
])dnl PKG_NOARCH_INSTALLDIR


dnl PKG_CHECK_VAR(VARIABLE, MODULE, CONFIG-VARIABLE,
dnl [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
dnl -------------------------------------------
dnl Since: 0.28
dnl
dnl Retrieves the value of the pkg-config variable for the given module.
AC_DEFUN([PKG_CHECK_VAR],
[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
AC_ARG_VAR([$1], [value of $3 for $2, overriding pkg-config])dnl

_PKG_CONFIG([$1], [variable="][$3]["], [$2])
AS_VAR_COPY([$1], [pkg_cv_][$1])

AS_VAR_IF([$1], [""], [$5], [$4])dnl
])dnl PKG_CHECK_VAR

dnl xorg-macros.m4.  Generated from xorg-macros.m4.in xorgversion.m4 by configure.
dnl
dnl Copyright (c) 2005, 2015, Oracle and/or its affiliates. All rights reserved.
dnl
dnl Permission is hereby granted, free of charge, to any person obtaining a
dnl copy of this software and associated documentation files (the "Software"),
dnl to deal in the Software without restriction, including without limitation
dnl the rights to use, copy, modify, merge, publish, distribute, sublicense,
dnl and/or sell copies of the Software, and to permit persons to whom the
dnl Software is furnished to do so, subject to the following conditions:
dnl
dnl The above copyright notice and this permission notice (including the next
dnl paragraph) shall be included in all copies or substantial portions of the
dnl Software.
dnl
dnl THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
dnl IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
dnl FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
dnl THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
dnl LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
dnl FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
dnl DEALINGS IN THE SOFTWARE.

# XORG_MACROS_VERSION(required-version)
# -------------------------------------
# Minimum version: 1.1.0
#
# If you're using a macro added in Version 1.1 or newer, include this in
# your configure.ac with the minimum required version, such as:
# XORG_MACROS_VERSION(1.1)
#
# To ensure that this macro is defined, also add:
# m4_ifndef([XORG_MACROS_VERSION],
#     [m4_fatal([must install xorg-macros 1.1 or later before running autoconf/autogen])])
#
#
# See the "minimum version" comment for each macro you use to see what
# version you require.
m4_defun([XORG_MACROS_VERSION],[
m4_define([vers_have], [1.19.0])
m4_define([maj_have], m4_substr(vers_have, 0, m4_index(vers_have, [.])))
m4_define([maj_needed], m4_substr([$1], 0, m4_index([$1], [.])))
m4_if(m4_cmp(maj_have, maj_needed), 0,,
    [m4_fatal([xorg-macros major version ]maj_needed[ is required but ]vers_have[ found])])
m4_if(m4_version_compare(vers_have, [$1]), -1,
    [m4_fatal([xorg-macros version $1 or higher is required but ]vers_have[ found])])
m4_undefine([vers_have])
m4_undefine([maj_have])
m4_undefine([maj_needed])
]) # XORG_MACROS_VERSION

# XORG_PROG_RAWCPP()
# ------------------
# Minimum version: 1.0.0
#
# Find cpp program and necessary flags for use in pre-processing text files
# such as man pages and config files
AC_DEFUN([XORG_PROG_RAWCPP],[
AC_REQUIRE([AC_PROG_CPP])
AC_PATH_PROGS(RAWCPP, [cpp], [${CPP}],
   [$PATH:/bin:/usr/bin:/usr/lib:/usr/libexec:/usr/ccs/lib:/usr/ccs/lbin:/lib])

# Check for flag to avoid builtin definitions - assumes unix is predefined,
# which is not the best choice for supporting other OS'es, but covers most
# of the ones we need for now.
AC_MSG_CHECKING([if $RAWCPP requires -undef])
AC_LANG_CONFTEST([AC_LANG_SOURCE([[Does cpp redefine unix ?]])])
if test `${RAWCPP} < conftest.$ac_ext | grep -c 'unix'` -eq 1 ; then
	AC_MSG_RESULT([no])
else
	if test `${RAWCPP} -undef < conftest.$ac_ext | grep -c 'unix'` -eq 1 ; then
		RAWCPPFLAGS=-undef
		AC_MSG_RESULT([yes])
	# under Cygwin unix is still defined even with -undef
	elif test `${RAWCPP} -undef -ansi < conftest.$ac_ext | grep -c 'unix'` -eq 1 ; then
		RAWCPPFLAGS="-undef -ansi"
		AC_MSG_RESULT([yes, with -ansi])
	else
		AC_MSG_ERROR([${RAWCPP} defines unix with or without -undef.  I don't know what to do.])
	fi
fi
rm -f conftest.$ac_ext

AC_MSG_CHECKING([if $RAWCPP requires -traditional])
AC_LANG_CONFTEST([AC_LANG_SOURCE([[Does cpp preserve   "whitespace"?]])])
if test `${RAWCPP} < conftest.$ac_ext | grep -c 'preserve   \"'` -eq 1 ; then
	AC_MSG_RESULT([no])
else
	if test `${RAWCPP} -traditional < conftest.$ac_ext | grep -c 'preserve   \"'` -eq 1 ; then
		TRADITIONALCPPFLAGS="-traditional"
		RAWCPPFLAGS="${RAWCPPFLAGS} -traditional"
		AC_MSG_RESULT([yes])
	else
		AC_MSG_ERROR([${RAWCPP} does not preserve whitespace with or without -traditional.  I don't know what to do.])
	fi
fi
rm -f conftest.$ac_ext
AC_SUBST(RAWCPPFLAGS)
AC_SUBST(TRADITIONALCPPFLAGS)
]) # XORG_PROG_RAWCPP

# XORG_MANPAGE_SECTIONS()
# -----------------------
# Minimum version: 1.0.0
#
# Determine which sections man pages go in for the different man page types
# on this OS - replaces *ManSuffix settings in old Imake *.cf per-os files.
# Not sure if there's any better way than just hardcoding by OS name.
# Override default settings by setting environment variables
# Added MAN_SUBSTS in version 1.8
# Added AC_PROG_SED in version 1.8

AC_DEFUN([XORG_MANPAGE_SECTIONS],[
AC_REQUIRE([AC_CANONICAL_HOST])
AC_REQUIRE([AC_PROG_SED])

if test x$APP_MAN_SUFFIX = x    ; then
    APP_MAN_SUFFIX=1
fi
if test x$APP_MAN_DIR = x    ; then
    APP_MAN_DIR='$(mandir)/man$(APP_MAN_SUFFIX)'
fi

if test x$LIB_MAN_SUFFIX = x    ; then
    LIB_MAN_SUFFIX=3
fi
if test x$LIB_MAN_DIR = x    ; then
    LIB_MAN_DIR='$(mandir)/man$(LIB_MAN_SUFFIX)'
fi

if test x$FILE_MAN_SUFFIX = x    ; then
    case $host_os in
	# Solaris 2.0 - 11 use SysV man page sections
	solaris2.?|solaris2.1[[01]])	FILE_MAN_SUFFIX=4  ;;
	*)				FILE_MAN_SUFFIX=5  ;;
    esac
fi
if test x$FILE_MAN_DIR = x    ; then
    FILE_MAN_DIR='$(mandir)/man$(FILE_MAN_SUFFIX)'
fi

if test x$MISC_MAN_SUFFIX = x    ; then
    case $host_os in
	# Solaris 2.0 - 11 use SysV man page sections
	solaris2.?|solaris2.1[[01]])	MISC_MAN_SUFFIX=5  ;;
	*)				MISC_MAN_SUFFIX=7  ;;
    esac
fi
if test x$MISC_MAN_DIR = x    ; then
    MISC_MAN_DIR='$(mandir)/man$(MISC_MAN_SUFFIX)'
fi

if test x$DRIVER_MAN_SUFFIX = x    ; then
    case $host_os in
	# Solaris 2.0 - 11 use SysV man page sections
	solaris2.?|solaris2.1[[01]])	DRIVER_MAN_SUFFIX=7  ;;
	*)				DRIVER_MAN_SUFFIX=4  ;;
    esac
fi
if test x$DRIVER_MAN_DIR = x    ; then
    DRIVER_MAN_DIR='$(mandir)/man$(DRIVER_MAN_SUFFIX)'
fi

if test x$ADMIN_MAN_SUFFIX = x    ; then
    case $host_os in
	# Solaris 2.0 - 11 use SysV man page sections
	solaris2.?|solaris2.1[[01]])	ADMIN_MAN_SUFFIX=1m ;;
	*)				ADMIN_MAN_SUFFIX=8  ;;
    esac
fi
if test x$ADMIN_MAN_DIR = x    ; then
    ADMIN_MAN_DIR='$(mandir)/man$(ADMIN_MAN_SUFFIX)'
fi


AC_SUBST([APP_MAN_SUFFIX])
AC_SUBST([LIB_MAN_SUFFIX])
AC_SUBST([FILE_MAN_SUFFIX])
AC_SUBST([MISC_MAN_SUFFIX])
AC_SUBST([DRIVER_MAN_SUFFIX])
AC_SUBST([ADMIN_MAN_SUFFIX])
AC_SUBST([APP_MAN_DIR])
AC_SUBST([LIB_MAN_DIR])
AC_SUBST([FILE_MAN_DIR])
AC_SUBST([MISC_MAN_DIR])
AC_SUBST([DRIVER_MAN_DIR])
AC_SUBST([ADMIN_MAN_DIR])

XORG_MAN_PAGE="X Version 11"
AC_SUBST([XORG_MAN_PAGE])
MAN_SUBSTS="\
	-e 's|__vendorversion__|\"\$(PACKAGE_STRING)\" \"\$(XORG_MAN_PAGE)\"|' \
	-e 's|__xorgversion__|\"\$(PACKAGE_STRING)\" \"\$(XORG_MAN_PAGE)\"|' \
	-e 's|__xservername__|Xorg|g' \
	-e 's|__xconfigfile__|xorg.conf|g' \
	-e 's|__projectroot__|\$(prefix)|g' \
	-e 's|__apploaddir__|\$(appdefaultdir)|g' \
	-e 's|__appmansuffix__|\$(APP_MAN_SUFFIX)|g' \
	-e 's|__drivermansuffix__|\$(DRIVER_MAN_SUFFIX)|g' \
	-e 's|__adminmansuffix__|\$(ADMIN_MAN_SUFFIX)|g' \
	-e 's|__libmansuffix__|\$(LIB_MAN_SUFFIX)|g' \
	-e 's|__miscmansuffix__|\$(MISC_MAN_SUFFIX)|g' \
	-e 's|__filemansuffix__|\$(FILE_MAN_SUFFIX)|g'"
AC_SUBST([MAN_SUBSTS])

]) # XORG_MANPAGE_SECTIONS

# XORG_CHECK_SGML_DOCTOOLS([MIN-VERSION])
# ------------------------
# Minimum version: 1.7.0
#
# Defines the variable XORG_SGML_PATH containing the location of X11/defs.ent
# provided by xorg-sgml-doctools, if installed.
AC_DEFUN([XORG_CHECK_SGML_DOCTOOLS],[
AC_MSG_CHECKING([for X.Org SGML entities m4_ifval([$1],[>= $1])])
XORG_SGML_PATH=
PKG_CHECK_EXISTS([xorg-sgml-doctools m4_ifval([$1],[>= $1])],
    [XORG_SGML_PATH=`$PKG_CONFIG --variable=sgmlrootdir xorg-sgml-doctools`],
    [m4_ifval([$1],[:],
        [if test x"$cross_compiling" != x"yes" ; then
            AC_CHECK_FILE([$prefix/share/sgml/X11/defs.ent],
                          [XORG_SGML_PATH=$prefix/share/sgml])
         fi])
    ])

# Define variables STYLESHEET_SRCDIR and XSL_STYLESHEET containing
# the path and the name of the doc stylesheet
if test "x$XORG_SGML_PATH" != "x" ; then
   AC_MSG_RESULT([$XORG_SGML_PATH])
   STYLESHEET_SRCDIR=$XORG_SGML_PATH/X11
   XSL_STYLESHEET=$STYLESHEET_SRCDIR/xorg.xsl
else
   AC_MSG_RESULT([no])
fi

AC_SUBST(XORG_SGML_PATH)
AC_SUBST(STYLESHEET_SRCDIR)
AC_SUBST(XSL_STYLESHEET)
AM_CONDITIONAL([HAVE_STYLESHEETS], [test "x$XSL_STYLESHEET" != "x"])
]) # XORG_CHECK_SGML_DOCTOOLS

# XORG_CHECK_LINUXDOC
# -------------------
# Minimum version: 1.0.0
#
# Defines the variable MAKE_TEXT if the necessary tools and
# files are found. $(MAKE_TEXT) blah.sgml will then produce blah.txt.
# Whether or not the necessary tools and files are found can be checked
# with the AM_CONDITIONAL "BUILD_LINUXDOC"
AC_DEFUN([XORG_CHECK_LINUXDOC],[
AC_REQUIRE([XORG_CHECK_SGML_DOCTOOLS])
AC_REQUIRE([XORG_WITH_PS2PDF])

AC_PATH_PROG(LINUXDOC, linuxdoc)

AC_MSG_CHECKING([whether to build documentation])

if test x$XORG_SGML_PATH != x && test x$LINUXDOC != x ; then
   BUILDDOC=yes
else
   BUILDDOC=no
fi

AM_CONDITIONAL(BUILD_LINUXDOC, [test x$BUILDDOC = xyes])

AC_MSG_RESULT([$BUILDDOC])

AC_MSG_CHECKING([whether to build pdf documentation])

if test x$have_ps2pdf != xno && test x$BUILD_PDFDOC != xno; then
   BUILDPDFDOC=yes
else
   BUILDPDFDOC=no
fi

AM_CONDITIONAL(BUILD_PDFDOC, [test x$BUILDPDFDOC = xyes])

AC_MSG_RESULT([$BUILDPDFDOC])

MAKE_TEXT="SGML_SEARCH_PATH=$XORG_SGML_PATH GROFF_NO_SGR=y $LINUXDOC -B txt -f"
MAKE_PS="SGML_SEARCH_PATH=$XORG_SGML_PATH $LINUXDOC -B latex --papersize=letter --output=ps"
MAKE_PDF="$PS2PDF"
MAKE_HTML="SGML_SEARCH_PATH=$XORG_SGML_PATH $LINUXDOC  -B html --split=0"

AC_SUBST(MAKE_TEXT)
AC_SUBST(MAKE_PS)
AC_SUBST(MAKE_PDF)
AC_SUBST(MAKE_HTML)
]) # XORG_CHECK_LINUXDOC

# XORG_CHECK_DOCBOOK
# -------------------
# Minimum version: 1.0.0
#
# Checks for the ability to build output formats from SGML DocBook source.
# For XXX in {TXT, PDF, PS, HTML}, the AM_CONDITIONAL "BUILD_XXXDOC"
# indicates whether the necessary tools and files are found and, if set,
# $(MAKE_XXX) blah.sgml will produce blah.xxx.
AC_DEFUN([XORG_CHECK_DOCBOOK],[
AC_REQUIRE([XORG_CHECK_SGML_DOCTOOLS])

BUILDTXTDOC=no
BUILDPDFDOC=no
BUILDPSDOC=no
BUILDHTMLDOC=no

AC_PATH_PROG(DOCBOOKPS, docbook2ps)
AC_PATH_PROG(DOCBOOKPDF, docbook2pdf)
AC_PATH_PROG(DOCBOOKHTML, docbook2html)
AC_PATH_PROG(DOCBOOKTXT, docbook2txt)

AC_MSG_CHECKING([whether to build text documentation])
if test x$XORG_SGML_PATH != x && test x$DOCBOOKTXT != x &&
   test x$BUILD_TXTDOC != xno; then
	BUILDTXTDOC=yes
fi
AM_CONDITIONAL(BUILD_TXTDOC, [test x$BUILDTXTDOC = xyes])
AC_MSG_RESULT([$BUILDTXTDOC])

AC_MSG_CHECKING([whether to build PDF documentation])
if test x$XORG_SGML_PATH != x && test x$DOCBOOKPDF != x &&
   test x$BUILD_PDFDOC != xno; then
	BUILDPDFDOC=yes
fi
AM_CONDITIONAL(BUILD_PDFDOC, [test x$BUILDPDFDOC = xyes])
AC_MSG_RESULT([$BUILDPDFDOC])

AC_MSG_CHECKING([whether to build PostScript documentation])
if test x$XORG_SGML_PATH != x && test x$DOCBOOKPS != x &&
   test x$BUILD_PSDOC != xno; then
	BUILDPSDOC=yes
fi
AM_CONDITIONAL(BUILD_PSDOC, [test x$BUILDPSDOC = xyes])
AC_MSG_RESULT([$BUILDPSDOC])

AC_MSG_CHECKING([whether to build HTML documentation])
if test x$XORG_SGML_PATH != x && test x$DOCBOOKHTML != x &&
   test x$BUILD_HTMLDOC != xno; then
	BUILDHTMLDOC=yes
fi
AM_CONDITIONAL(BUILD_HTMLDOC, [test x$BUILDHTMLDOC = xyes])
AC_MSG_RESULT([$BUILDHTMLDOC])

MAKE_TEXT="SGML_SEARCH_PATH=$XORG_SGML_PATH $DOCBOOKTXT"
MAKE_PS="SGML_SEARCH_PATH=$XORG_SGML_PATH $DOCBOOKPS"
MAKE_PDF="SGML_SEARCH_PATH=$XORG_SGML_PATH $DOCBOOKPDF"
MAKE_HTML="SGML_SEARCH_PATH=$XORG_SGML_PATH $DOCBOOKHTML"

AC_SUBST(MAKE_TEXT)
AC_SUBST(MAKE_PS)
AC_SUBST(MAKE_PDF)
AC_SUBST(MAKE_HTML)
]) # XORG_CHECK_DOCBOOK

# XORG_WITH_XMLTO([MIN-VERSION], [DEFAULT])
# ----------------
# Minimum version: 1.5.0
# Minimum version for optional DEFAULT argument: 1.11.0
#
# Documentation tools are not always available on all platforms and sometimes
# not at the appropriate level. This macro enables a module to test for the
# presence of the tool and obtain it's path in separate variables. Coupled with
# the --with-xmlto option, it allows maximum flexibilty in making decisions
# as whether or not to use the xmlto package. When DEFAULT is not specified,
# --with-xmlto assumes 'auto'.
#
# Interface to module:
# HAVE_XMLTO: 	used in makefiles to conditionally generate documentation
# XMLTO:	returns the path of the xmlto program found
#		returns the path set by the user in the environment
# --with-xmlto:	'yes' user instructs the module to use xmlto
#		'no' user instructs the module not to use xmlto
#
# Added in version 1.10.0
# HAVE_XMLTO_TEXT: used in makefiles to conditionally generate text documentation
#                  xmlto for text output requires either lynx, links, or w3m browsers
#
# If the user sets the value of XMLTO, AC_PATH_PROG skips testing the path.
#
AC_DEFUN([XORG_WITH_XMLTO],[
AC_ARG_VAR([XMLTO], [Path to xmlto command])
m4_define([_defopt], m4_default([$2], [auto]))
AC_ARG_WITH(xmlto,
	AS_HELP_STRING([--with-xmlto],
	   [Use xmlto to regenerate documentation (default: ]_defopt[)]),
	   [use_xmlto=$withval], [use_xmlto=]_defopt)
m4_undefine([_defopt])

if test "x$use_xmlto" = x"auto"; then
   AC_PATH_PROG([XMLTO], [xmlto])
   if test "x$XMLTO" = "x"; then
        AC_MSG_WARN([xmlto not found - documentation targets will be skipped])
	have_xmlto=no
   else
        have_xmlto=yes
   fi
elif test "x$use_xmlto" = x"yes" ; then
   AC_PATH_PROG([XMLTO], [xmlto])
   if test "x$XMLTO" = "x"; then
        AC_MSG_ERROR([--with-xmlto=yes specified but xmlto not found in PATH])
   fi
   have_xmlto=yes
elif test "x$use_xmlto" = x"no" ; then
   if test "x$XMLTO" != "x"; then
      AC_MSG_WARN([ignoring XMLTO environment variable since --with-xmlto=no was specified])
   fi
   have_xmlto=no
else
   AC_MSG_ERROR([--with-xmlto expects 'yes' or 'no'])
fi

# Test for a minimum version of xmlto, if provided.
m4_ifval([$1],
[if test "$have_xmlto" = yes; then
    # scrape the xmlto version
    AC_MSG_CHECKING([the xmlto version])
    xmlto_version=`$XMLTO --version 2>/dev/null | cut -d' ' -f3`
    AC_MSG_RESULT([$xmlto_version])
    AS_VERSION_COMPARE([$xmlto_version], [$1],
        [if test "x$use_xmlto" = xauto; then
            AC_MSG_WARN([xmlto version $xmlto_version found, but $1 needed])
            have_xmlto=no
        else
            AC_MSG_ERROR([xmlto version $xmlto_version found, but $1 needed])
        fi])
fi])

# Test for the ability of xmlto to generate a text target
#
# NOTE: xmlto 0.0.27 or higher return a non-zero return code in the
# following test for empty XML docbook files.
# For compatibility reasons use the following empty XML docbook file and if
# it fails try it again with a non-empty XML file.
have_xmlto_text=no
cat > conftest.xml << "EOF"
EOF
AS_IF([test "$have_xmlto" = yes],
      [AS_IF([$XMLTO --skip-validation txt conftest.xml >/dev/null 2>&1],
             [have_xmlto_text=yes],
             [# Try it again with a non-empty XML file.
              cat > conftest.xml << "EOF"
<x></x>
EOF
              AS_IF([$XMLTO --skip-validation txt conftest.xml >/dev/null 2>&1],
                    [have_xmlto_text=yes],
                    [AC_MSG_WARN([xmlto cannot generate text format, this format skipped])])])])
rm -f conftest.xml
AM_CONDITIONAL([HAVE_XMLTO_TEXT], [test $have_xmlto_text = yes])
AM_CONDITIONAL([HAVE_XMLTO], [test "$have_xmlto" = yes])
]) # XORG_WITH_XMLTO

# XORG_WITH_XSLTPROC([MIN-VERSION], [DEFAULT])
# --------------------------------------------
# Minimum version: 1.12.0
# Minimum version for optional DEFAULT argument: 1.12.0
#
# XSLT (Extensible Stylesheet Language Transformations) is a declarative,
# XML-based language used for the transformation of XML documents.
# The xsltproc command line tool is for applying XSLT stylesheets to XML documents.
# It is used under the cover by xmlto to generate html files from DocBook/XML.
# The XSLT processor is often used as a standalone tool for transformations.
# It should not be assumed that this tool is used only to work with documnetation.
# When DEFAULT is not specified, --with-xsltproc assumes 'auto'.
#
# Interface to module:
# HAVE_XSLTPROC: used in makefiles to conditionally generate documentation
# XSLTPROC:	 returns the path of the xsltproc program found
#		 returns the path set by the user in the environment
# --with-xsltproc: 'yes' user instructs the module to use xsltproc
#		  'no' user instructs the module not to use xsltproc
# have_xsltproc: returns yes if xsltproc found in PATH or no
#
# If the user sets the value of XSLTPROC, AC_PATH_PROG skips testing the path.
#
AC_DEFUN([XORG_WITH_XSLTPROC],[
AC_ARG_VAR([XSLTPROC], [Path to xsltproc command])
# Preserves the interface, should it be implemented later
m4_ifval([$1], [m4_warn([syntax], [Checking for xsltproc MIN-VERSION is not implemented])])
m4_define([_defopt], m4_default([$2], [auto]))
AC_ARG_WITH(xsltproc,
	AS_HELP_STRING([--with-xsltproc],
	   [Use xsltproc for the transformation of XML documents (default: ]_defopt[)]),
	   [use_xsltproc=$withval], [use_xsltproc=]_defopt)
m4_undefine([_defopt])

if test "x$use_xsltproc" = x"auto"; then
   AC_PATH_PROG([XSLTPROC], [xsltproc])
   if test "x$XSLTPROC" = "x"; then
        AC_MSG_WARN([xsltproc not found - cannot transform XML documents])
	have_xsltproc=no
   else
        have_xsltproc=yes
   fi
elif test "x$use_xsltproc" = x"yes" ; then
   AC_PATH_PROG([XSLTPROC], [xsltproc])
   if test "x$XSLTPROC" = "x"; then
        AC_MSG_ERROR([--with-xsltproc=yes specified but xsltproc not found in PATH])
   fi
   have_xsltproc=yes
elif test "x$use_xsltproc" = x"no" ; then
   if test "x$XSLTPROC" != "x"; then
      AC_MSG_WARN([ignoring XSLTPROC environment variable since --with-xsltproc=no was specified])
   fi
   have_xsltproc=no
else
   AC_MSG_ERROR([--with-xsltproc expects 'yes' or 'no'])
fi

AM_CONDITIONAL([HAVE_XSLTPROC], [test "$have_xsltproc" = yes])
]) # XORG_WITH_XSLTPROC

# XORG_WITH_PERL([MIN-VERSION], [DEFAULT])
# ----------------------------------------
# Minimum version: 1.15.0
#
# PERL (Practical Extraction and Report Language) is a language optimized for
# scanning arbitrary text files, extracting information from those text files,
# and printing reports based on that information.
#
# When DEFAULT is not specified, --with-perl assumes 'auto'.
#
# Interface to module:
# HAVE_PERL: used in makefiles to conditionally scan text files
# PERL:	     returns the path of the perl program found
#	     returns the path set by the user in the environment
# --with-perl: 'yes' user instructs the module to use perl
#	       'no' user instructs the module not to use perl
# have_perl: returns yes if perl found in PATH or no
#
# If the user sets the value of PERL, AC_PATH_PROG skips testing the path.
#
AC_DEFUN([XORG_WITH_PERL],[
AC_ARG_VAR([PERL], [Path to perl command])
# Preserves the interface, should it be implemented later
m4_ifval([$1], [m4_warn([syntax], [Checking for perl MIN-VERSION is not implemented])])
m4_define([_defopt], m4_default([$2], [auto]))
AC_ARG_WITH(perl,
	AS_HELP_STRING([--with-perl],
	   [Use perl for extracting information from files (default: ]_defopt[)]),
	   [use_perl=$withval], [use_perl=]_defopt)
m4_undefine([_defopt])

if test "x$use_perl" = x"auto"; then
   AC_PATH_PROG([PERL], [perl])
   if test "x$PERL" = "x"; then
        AC_MSG_WARN([perl not found - cannot extract information and report])
	have_perl=no
   else
        have_perl=yes
   fi
elif test "x$use_perl" = x"yes" ; then
   AC_PATH_PROG([PERL], [perl])
   if test "x$PERL" = "x"; then
        AC_MSG_ERROR([--with-perl=yes specified but perl not found in PATH])
   fi
   have_perl=yes
elif test "x$use_perl" = x"no" ; then
   if test "x$PERL" != "x"; then
      AC_MSG_WARN([ignoring PERL environment variable since --with-perl=no was specified])
   fi
   have_perl=no
else
   AC_MSG_ERROR([--with-perl expects 'yes' or 'no'])
fi

AM_CONDITIONAL([HAVE_PERL], [test "$have_perl" = yes])
]) # XORG_WITH_PERL

# XORG_WITH_ASCIIDOC([MIN-VERSION], [DEFAULT])
# ----------------
# Minimum version: 1.5.0
# Minimum version for optional DEFAULT argument: 1.11.0
#
# Documentation tools are not always available on all platforms and sometimes
# not at the appropriate level. This macro enables a module to test for the
# presence of the tool and obtain it's path in separate variables. Coupled with
# the --with-asciidoc option, it allows maximum flexibilty in making decisions
# as whether or not to use the asciidoc package. When DEFAULT is not specified,
# --with-asciidoc assumes 'auto'.
#
# Interface to module:
# HAVE_ASCIIDOC: used in makefiles to conditionally generate documentation
# ASCIIDOC:	 returns the path of the asciidoc program found
#		 returns the path set by the user in the environment
# --with-asciidoc: 'yes' user instructs the module to use asciidoc
#		  'no' user instructs the module not to use asciidoc
#
# If the user sets the value of ASCIIDOC, AC_PATH_PROG skips testing the path.
#
AC_DEFUN([XORG_WITH_ASCIIDOC],[
AC_ARG_VAR([ASCIIDOC], [Path to asciidoc command])
m4_define([_defopt], m4_default([$2], [auto]))
AC_ARG_WITH(asciidoc,
	AS_HELP_STRING([--with-asciidoc],
	   [Use asciidoc to regenerate documentation (default: ]_defopt[)]),
	   [use_asciidoc=$withval], [use_asciidoc=]_defopt)
m4_undefine([_defopt])

if test "x$use_asciidoc" = x"auto"; then
   AC_PATH_PROG([ASCIIDOC], [asciidoc])
   if test "x$ASCIIDOC" = "x"; then
        AC_MSG_WARN([asciidoc not found - documentation targets will be skipped])
	have_asciidoc=no
   else
        have_asciidoc=yes
   fi
elif test "x$use_asciidoc" = x"yes" ; then
   AC_PATH_PROG([ASCIIDOC], [asciidoc])
   if test "x$ASCIIDOC" = "x"; then
        AC_MSG_ERROR([--with-asciidoc=yes specified but asciidoc not found in PATH])
   fi
   have_asciidoc=yes
elif test "x$use_asciidoc" = x"no" ; then
   if test "x$ASCIIDOC" != "x"; then
      AC_MSG_WARN([ignoring ASCIIDOC environment variable since --with-asciidoc=no was specified])
   fi
   have_asciidoc=no
else
   AC_MSG_ERROR([--with-asciidoc expects 'yes' or 'no'])
fi
m4_ifval([$1],
[if test "$have_asciidoc" = yes; then
    # scrape the asciidoc version
    AC_MSG_CHECKING([the asciidoc version])
    asciidoc_version=`$ASCIIDOC --version 2>/dev/null | cut -d' ' -f2`
    AC_MSG_RESULT([$asciidoc_version])
    AS_VERSION_COMPARE([$asciidoc_version], [$1],
        [if test "x$use_asciidoc" = xauto; then
            AC_MSG_WARN([asciidoc version $asciidoc_version found, but $1 needed])
            have_asciidoc=no
        else
            AC_MSG_ERROR([asciidoc version $asciidoc_version found, but $1 needed])
        fi])
fi])
AM_CONDITIONAL([HAVE_ASCIIDOC], [test "$have_asciidoc" = yes])
]) # XORG_WITH_ASCIIDOC

# XORG_WITH_DOXYGEN([MIN-VERSION], [DEFAULT])
# -------------------------------------------
# Minimum version: 1.5.0
# Minimum version for optional DEFAULT argument: 1.11.0
# Minimum version for optional DOT checking: 1.18.0
#
# Documentation tools are not always available on all platforms and sometimes
# not at the appropriate level. This macro enables a module to test for the
# presence of the tool and obtain it's path in separate variables. Coupled with
# the --with-doxygen option, it allows maximum flexibilty in making decisions
# as whether or not to use the doxygen package. When DEFAULT is not specified,
# --with-doxygen assumes 'auto'.
#
# Interface to module:
# HAVE_DOXYGEN: used in makefiles to conditionally generate documentation
# DOXYGEN:	 returns the path of the doxygen program found
#		 returns the path set by the user in the environment
# --with-doxygen: 'yes' user instructs the module to use doxygen
#		  'no' user instructs the module not to use doxygen
#
# If the user sets the value of DOXYGEN, AC_PATH_PROG skips testing the path.
#
AC_DEFUN([XORG_WITH_DOXYGEN],[
AC_ARG_VAR([DOXYGEN], [Path to doxygen command])
AC_ARG_VAR([DOT], [Path to the dot graphics utility])
m4_define([_defopt], m4_default([$2], [auto]))
AC_ARG_WITH(doxygen,
	AS_HELP_STRING([--with-doxygen],
	   [Use doxygen to regenerate documentation (default: ]_defopt[)]),
	   [use_doxygen=$withval], [use_doxygen=]_defopt)
m4_undefine([_defopt])

if test "x$use_doxygen" = x"auto"; then
   AC_PATH_PROG([DOXYGEN], [doxygen])
   if test "x$DOXYGEN" = "x"; then
        AC_MSG_WARN([doxygen not found - documentation targets will be skipped])
	have_doxygen=no
   else
        have_doxygen=yes
   fi
elif test "x$use_doxygen" = x"yes" ; then
   AC_PATH_PROG([DOXYGEN], [doxygen])
   if test "x$DOXYGEN" = "x"; then
        AC_MSG_ERROR([--with-doxygen=yes specified but doxygen not found in PATH])
   fi
   have_doxygen=yes
elif test "x$use_doxygen" = x"no" ; then
   if test "x$DOXYGEN" != "x"; then
      AC_MSG_WARN([ignoring DOXYGEN environment variable since --with-doxygen=no was specified])
   fi
   have_doxygen=no
else
   AC_MSG_ERROR([--with-doxygen expects 'yes' or 'no'])
fi
m4_ifval([$1],
[if test "$have_doxygen" = yes; then
    # scrape the doxygen version
    AC_MSG_CHECKING([the doxygen version])
    doxygen_version=`$DOXYGEN --version 2>/dev/null`
    AC_MSG_RESULT([$doxygen_version])
    AS_VERSION_COMPARE([$doxygen_version], [$1],
        [if test "x$use_doxygen" = xauto; then
            AC_MSG_WARN([doxygen version $doxygen_version found, but $1 needed])
            have_doxygen=no
        else
            AC_MSG_ERROR([doxygen version $doxygen_version found, but $1 needed])
        fi])
fi])

dnl Check for DOT if we have doxygen. The caller decides if it is mandatory
dnl HAVE_DOT is a variable that can be used in your doxygen.in config file:
dnl 	HAVE_DOT = @HAVE_DOT@
HAVE_DOT=no
if test "x$have_doxygen" = "xyes"; then
  AC_PATH_PROG([DOT], [dot])
    if test "x$DOT" != "x"; then
      HAVE_DOT=yes
    fi
fi

AC_SUBST([HAVE_DOT])
AM_CONDITIONAL([HAVE_DOT], [test "$HAVE_DOT" = "yes"])
AM_CONDITIONAL([HAVE_DOXYGEN], [test "$have_doxygen" = yes])
]) # XORG_WITH_DOXYGEN

# XORG_WITH_GROFF([DEFAULT])
# ----------------
# Minimum version: 1.6.0
# Minimum version for optional DEFAULT argument: 1.11.0
#
# Documentation tools are not always available on all platforms and sometimes
# not at the appropriate level. This macro enables a module to test for the
# presence of the tool and obtain it's path in separate variables. Coupled with
# the --with-groff option, it allows maximum flexibilty in making decisions
# as whether or not to use the groff package. When DEFAULT is not specified,
# --with-groff assumes 'auto'.
#
# Interface to module:
# HAVE_GROFF:	 used in makefiles to conditionally generate documentation
# HAVE_GROFF_MM: the memorandum macros (-mm) package
# HAVE_GROFF_MS: the -ms macros package
# GROFF:	 returns the path of the groff program found
#		 returns the path set by the user in the environment
# --with-groff:	 'yes' user instructs the module to use groff
#		 'no' user instructs the module not to use groff
#
# Added in version 1.9.0:
# HAVE_GROFF_HTML: groff has dependencies to output HTML format:
#		   pnmcut pnmcrop pnmtopng pnmtops from the netpbm package.
#		   psselect from the psutils package.
#		   the ghostcript package. Refer to the grohtml man pages
#
# If the user sets the value of GROFF, AC_PATH_PROG skips testing the path.
#
# OS and distros often splits groff in a basic and full package, the former
# having the groff program and the later having devices, fonts and macros
# Checking for the groff executable is not enough.
#
# If macros are missing, we cannot assume that groff is useless, so we don't
# unset HAVE_GROFF or GROFF env variables.
# HAVE_GROFF_?? can never be true while HAVE_GROFF is false.
#
AC_DEFUN([XORG_WITH_GROFF],[
AC_ARG_VAR([GROFF], [Path to groff command])
m4_define([_defopt], m4_default([$1], [auto]))
AC_ARG_WITH(groff,
	AS_HELP_STRING([--with-groff],
	   [Use groff to regenerate documentation (default: ]_defopt[)]),
	   [use_groff=$withval], [use_groff=]_defopt)
m4_undefine([_defopt])

if test "x$use_groff" = x"auto"; then
   AC_PATH_PROG([GROFF], [groff])
   if test "x$GROFF" = "x"; then
        AC_MSG_WARN([groff not found - documentation targets will be skipped])
	have_groff=no
   else
        have_groff=yes
   fi
elif test "x$use_groff" = x"yes" ; then
   AC_PATH_PROG([GROFF], [groff])
   if test "x$GROFF" = "x"; then
        AC_MSG_ERROR([--with-groff=yes specified but groff not found in PATH])
   fi
   have_groff=yes
elif test "x$use_groff" = x"no" ; then
   if test "x$GROFF" != "x"; then
      AC_MSG_WARN([ignoring GROFF environment variable since --with-groff=no was specified])
   fi
   have_groff=no
else
   AC_MSG_ERROR([--with-groff expects 'yes' or 'no'])
fi

# We have groff, test for the presence of the macro packages
if test "x$have_groff" = x"yes"; then
    AC_MSG_CHECKING([for ${GROFF} -ms macros])
    if ${GROFF} -ms -I. /dev/null >/dev/null 2>&1 ; then
        groff_ms_works=yes
    else
        groff_ms_works=no
    fi
    AC_MSG_RESULT([$groff_ms_works])
    AC_MSG_CHECKING([for ${GROFF} -mm macros])
    if ${GROFF} -mm -I. /dev/null >/dev/null 2>&1 ; then
        groff_mm_works=yes
    else
        groff_mm_works=no
    fi
    AC_MSG_RESULT([$groff_mm_works])
fi

# We have groff, test for HTML dependencies, one command per package
if test "x$have_groff" = x"yes"; then
   AC_PATH_PROGS(GS_PATH, [gs gswin32c])
   AC_PATH_PROG(PNMTOPNG_PATH, [pnmtopng])
   AC_PATH_PROG(PSSELECT_PATH, [psselect])
   if test "x$GS_PATH" != "x" -a "x$PNMTOPNG_PATH" != "x" -a "x$PSSELECT_PATH" != "x"; then
      have_groff_html=yes
   else
      have_groff_html=no
      AC_MSG_WARN([grohtml dependencies not found - HTML Documentation skipped. Refer to grohtml man pages])
   fi
fi

# Set Automake conditionals for Makefiles
AM_CONDITIONAL([HAVE_GROFF], [test "$have_groff" = yes])
AM_CONDITIONAL([HAVE_GROFF_MS], [test "$groff_ms_works" = yes])
AM_CONDITIONAL([HAVE_GROFF_MM], [test "$groff_mm_works" = yes])
AM_CONDITIONAL([HAVE_GROFF_HTML], [test "$have_groff_html" = yes])
]) # XORG_WITH_GROFF

# XORG_WITH_FOP([MIN-VERSION], [DEFAULT])
# ---------------------------------------
# Minimum version: 1.6.0
# Minimum version for optional DEFAULT argument: 1.11.0
# Minimum version for optional MIN-VERSION argument: 1.15.0
#
# Documentation tools are not always available on all platforms and sometimes
# not at the appropriate level. This macro enables a module to test for the
# presence of the tool and obtain it's path in separate variables. Coupled with
# the --with-fop option, it allows maximum flexibilty in making decisions
# as whether or not to use the fop package. When DEFAULT is not specified,
# --with-fop assumes 'auto'.
#
# Interface to module:
# HAVE_FOP: 	used in makefiles to conditionally generate documentation
# FOP:	 	returns the path of the fop program found
#		returns the path set by the user in the environment
# --with-fop: 	'yes' user instructs the module to use fop
#		'no' user instructs the module not to use fop
#
# If the user sets the value of FOP, AC_PATH_PROG skips testing the path.
#
AC_DEFUN([XORG_WITH_FOP],[
AC_ARG_VAR([FOP], [Path to fop command])
m4_define([_defopt], m4_default([$2], [auto]))
AC_ARG_WITH(fop,
	AS_HELP_STRING([--with-fop],
	   [Use fop to regenerate documentation (default: ]_defopt[)]),
	   [use_fop=$withval], [use_fop=]_defopt)
m4_undefine([_defopt])

if test "x$use_fop" = x"auto"; then
   AC_PATH_PROG([FOP], [fop])
   if test "x$FOP" = "x"; then
        AC_MSG_WARN([fop not found - documentation targets will be skipped])
	have_fop=no
   else
        have_fop=yes
   fi
elif test "x$use_fop" = x"yes" ; then
   AC_PATH_PROG([FOP], [fop])
   if test "x$FOP" = "x"; then
        AC_MSG_ERROR([--with-fop=yes specified but fop not found in PATH])
   fi
   have_fop=yes
elif test "x$use_fop" = x"no" ; then
   if test "x$FOP" != "x"; then
      AC_MSG_WARN([ignoring FOP environment variable since --with-fop=no was specified])
   fi
   have_fop=no
else
   AC_MSG_ERROR([--with-fop expects 'yes' or 'no'])
fi

# Test for a minimum version of fop, if provided.
m4_ifval([$1],
[if test "$have_fop" = yes; then
    # scrape the fop version
    AC_MSG_CHECKING([for fop minimum version])
    fop_version=`$FOP -version 2>/dev/null | cut -d' ' -f3`
    AC_MSG_RESULT([$fop_version])
    AS_VERSION_COMPARE([$fop_version], [$1],
        [if test "x$use_fop" = xauto; then
            AC_MSG_WARN([fop version $fop_version found, but $1 needed])
            have_fop=no
        else
            AC_MSG_ERROR([fop version $fop_version found, but $1 needed])
        fi])
fi])
AM_CONDITIONAL([HAVE_FOP], [test "$have_fop" = yes])
]) # XORG_WITH_FOP

# XORG_WITH_M4([MIN-VERSION])
# ---------------------------
# Minimum version: 1.19.0
#
# This macro attempts to locate an m4 macro processor which supports
# -I option and is only useful for modules relying on M4 in order to
# expand macros in source code files.
#
# Interface to module:
# M4:	 	returns the path of the m4 program found
#		returns the path set by the user in the environment
#
AC_DEFUN([XORG_WITH_M4], [
AC_CACHE_CHECK([for m4 that supports -I option], [ac_cv_path_M4],
   [AC_PATH_PROGS_FEATURE_CHECK([M4], [m4 gm4],
       [[$ac_path_M4 -I. /dev/null > /dev/null 2>&1 && \
         ac_cv_path_M4=$ac_path_M4 ac_path_M4_found=:]],
   [AC_MSG_ERROR([could not find m4 that supports -I option])],
   [$PATH:/usr/gnu/bin])])

AC_SUBST([M4], [$ac_cv_path_M4])
]) # XORG_WITH_M4

# XORG_WITH_PS2PDF([DEFAULT])
# ----------------
# Minimum version: 1.6.0
# Minimum version for optional DEFAULT argument: 1.11.0
#
# Documentation tools are not always available on all platforms and sometimes
# not at the appropriate level. This macro enables a module to test for the
# presence of the tool and obtain it's path in separate variables. Coupled with
# the --with-ps2pdf option, it allows maximum flexibilty in making decisions
# as whether or not to use the ps2pdf package. When DEFAULT is not specified,
# --with-ps2pdf assumes 'auto'.
#
# Interface to module:
# HAVE_PS2PDF: 	used in makefiles to conditionally generate documentation
# PS2PDF:	returns the path of the ps2pdf program found
#		returns the path set by the user in the environment
# --with-ps2pdf: 'yes' user instructs the module to use ps2pdf
#		 'no' user instructs the module not to use ps2pdf
#
# If the user sets the value of PS2PDF, AC_PATH_PROG skips testing the path.
#
AC_DEFUN([XORG_WITH_PS2PDF],[
AC_ARG_VAR([PS2PDF], [Path to ps2pdf command])
m4_define([_defopt], m4_default([$1], [auto]))
AC_ARG_WITH(ps2pdf,
	AS_HELP_STRING([--with-ps2pdf],
	   [Use ps2pdf to regenerate documentation (default: ]_defopt[)]),
	   [use_ps2pdf=$withval], [use_ps2pdf=]_defopt)
m4_undefine([_defopt])

if test "x$use_ps2pdf" = x"auto"; then
   AC_PATH_PROG([PS2PDF], [ps2pdf])
   if test "x$PS2PDF" = "x"; then
        AC_MSG_WARN([ps2pdf not found - documentation targets will be skipped])
	have_ps2pdf=no
   else
        have_ps2pdf=yes
   fi
elif test "x$use_ps2pdf" = x"yes" ; then
   AC_PATH_PROG([PS2PDF], [ps2pdf])
   if test "x$PS2PDF" = "x"; then
        AC_MSG_ERROR([--with-ps2pdf=yes specified but ps2pdf not found in PATH])
   fi
   have_ps2pdf=yes
elif test "x$use_ps2pdf" = x"no" ; then
   if test "x$PS2PDF" != "x"; then
      AC_MSG_WARN([ignoring PS2PDF environment variable since --with-ps2pdf=no was specified])
   fi
   have_ps2pdf=no
else
   AC_MSG_ERROR([--with-ps2pdf expects 'yes' or 'no'])
fi
AM_CONDITIONAL([HAVE_PS2PDF], [test "$have_ps2pdf" = yes])
]) # XORG_WITH_PS2PDF

# XORG_ENABLE_DOCS (enable_docs=yes)
# ----------------
# Minimum version: 1.6.0
#
# Documentation tools are not always available on all platforms and sometimes
# not at the appropriate level. This macro enables a builder to skip all
# documentation targets except traditional man pages.
# Combined with the specific tool checking macros XORG_WITH_*, it provides
# maximum flexibilty in controlling documentation building.
# Refer to:
# XORG_WITH_XMLTO         --with-xmlto
# XORG_WITH_ASCIIDOC      --with-asciidoc
# XORG_WITH_DOXYGEN       --with-doxygen
# XORG_WITH_FOP           --with-fop
# XORG_WITH_GROFF         --with-groff
# XORG_WITH_PS2PDF        --with-ps2pdf
#
# Interface to module:
# ENABLE_DOCS: 	  used in makefiles to conditionally generate documentation
# --enable-docs: 'yes' user instructs the module to generate docs
#		 'no' user instructs the module not to generate docs
# parm1:	specify the default value, yes or no.
#
AC_DEFUN([XORG_ENABLE_DOCS],[
m4_define([docs_default], m4_default([$1], [yes]))
AC_ARG_ENABLE(docs,
	AS_HELP_STRING([--enable-docs],
	   [Enable building the documentation (default: ]docs_default[)]),
	   [build_docs=$enableval], [build_docs=]docs_default)
m4_undefine([docs_default])
AM_CONDITIONAL(ENABLE_DOCS, [test x$build_docs = xyes])
AC_MSG_CHECKING([whether to build documentation])
AC_MSG_RESULT([$build_docs])
]) # XORG_ENABLE_DOCS

# XORG_ENABLE_DEVEL_DOCS (enable_devel_docs=yes)
# ----------------
# Minimum version: 1.6.0
#
# This macro enables a builder to skip all developer documentation.
# Combined with the specific tool checking macros XORG_WITH_*, it provides
# maximum flexibilty in controlling documentation building.
# Refer to:
# XORG_WITH_XMLTO         --with-xmlto
# XORG_WITH_ASCIIDOC      --with-asciidoc
# XORG_WITH_DOXYGEN       --with-doxygen
# XORG_WITH_FOP           --with-fop
# XORG_WITH_GROFF         --with-groff
# XORG_WITH_PS2PDF        --with-ps2pdf
#
# Interface to module:
# ENABLE_DEVEL_DOCS:	used in makefiles to conditionally generate developer docs
# --enable-devel-docs:	'yes' user instructs the module to generate developer docs
#			'no' user instructs the module not to generate developer docs
# parm1:		specify the default value, yes or no.
#
AC_DEFUN([XORG_ENABLE_DEVEL_DOCS],[
m4_define([devel_default], m4_default([$1], [yes]))
AC_ARG_ENABLE(devel-docs,
	AS_HELP_STRING([--enable-devel-docs],
	   [Enable building the developer documentation (default: ]devel_default[)]),
	   [build_devel_docs=$enableval], [build_devel_docs=]devel_default)
m4_undefine([devel_default])
AM_CONDITIONAL(ENABLE_DEVEL_DOCS, [test x$build_devel_docs = xyes])
AC_MSG_CHECKING([whether to build developer documentation])
AC_MSG_RESULT([$build_devel_docs])
]) # XORG_ENABLE_DEVEL_DOCS

# XORG_ENABLE_SPECS (enable_specs=yes)
# ----------------
# Minimum version: 1.6.0
#
# This macro enables a builder to skip all functional specification targets.
# Combined with the specific tool checking macros XORG_WITH_*, it provides
# maximum flexibilty in controlling documentation building.
# Refer to:
# XORG_WITH_XMLTO         --with-xmlto
# XORG_WITH_ASCIIDOC      --with-asciidoc
# XORG_WITH_DOXYGEN       --with-doxygen
# XORG_WITH_FOP           --with-fop
# XORG_WITH_GROFF         --with-groff
# XORG_WITH_PS2PDF        --with-ps2pdf
#
# Interface to module:
# ENABLE_SPECS:		used in makefiles to conditionally generate specs
# --enable-specs:	'yes' user instructs the module to generate specs
#			'no' user instructs the module not to generate specs
# parm1:		specify the default value, yes or no.
#
AC_DEFUN([XORG_ENABLE_SPECS],[
m4_define([spec_default], m4_default([$1], [yes]))
AC_ARG_ENABLE(specs,
	AS_HELP_STRING([--enable-specs],
	   [Enable building the specs (default: ]spec_default[)]),
	   [build_specs=$enableval], [build_specs=]spec_default)
m4_undefine([spec_default])
AM_CONDITIONAL(ENABLE_SPECS, [test x$build_specs = xyes])
AC_MSG_CHECKING([whether to build functional specifications])
AC_MSG_RESULT([$build_specs])
]) # XORG_ENABLE_SPECS

# XORG_ENABLE_UNIT_TESTS (enable_unit_tests=auto)
# ----------------------------------------------
# Minimum version: 1.13.0
#
# This macro enables a builder to enable/disable unit testing
# It makes no assumption about the test cases implementation
# Test cases may or may not use Automake "Support for test suites"
# They may or may not use the software utility library GLib
#
# When used in conjunction with XORG_WITH_GLIB, use both AM_CONDITIONAL
# ENABLE_UNIT_TESTS and HAVE_GLIB. Not all unit tests may use glib.
# The variable enable_unit_tests is used by other macros in this file.
#
# Interface to module:
# ENABLE_UNIT_TESTS:	used in makefiles to conditionally build tests
# enable_unit_tests:    used in configure.ac for additional configuration
# --enable-unit-tests:	'yes' user instructs the module to build tests
#			'no' user instructs the module not to build tests
# parm1:		specify the default value, yes or no.
#
AC_DEFUN([XORG_ENABLE_UNIT_TESTS],[
AC_BEFORE([$0], [XORG_WITH_GLIB])
AC_BEFORE([$0], [XORG_LD_WRAP])
AC_REQUIRE([XORG_MEMORY_CHECK_FLAGS])
m4_define([_defopt], m4_default([$1], [auto]))
AC_ARG_ENABLE(unit-tests, AS_HELP_STRING([--enable-unit-tests],
	[Enable building unit test cases (default: ]_defopt[)]),
	[enable_unit_tests=$enableval], [enable_unit_tests=]_defopt)
m4_undefine([_defopt])
AM_CONDITIONAL(ENABLE_UNIT_TESTS, [test "x$enable_unit_tests" != xno])
AC_MSG_CHECKING([whether to build unit test cases])
AC_MSG_RESULT([$enable_unit_tests])
]) # XORG_ENABLE_UNIT_TESTS

# XORG_ENABLE_INTEGRATION_TESTS (enable_unit_tests=auto)
# ------------------------------------------------------
# Minimum version: 1.17.0
#
# This macro enables a builder to enable/disable integration testing
# It makes no assumption about the test cases' implementation
# Test cases may or may not use Automake "Support for test suites"
#
# Please see XORG_ENABLE_UNIT_TESTS for unit test support. Unit test support
# usually requires less dependencies and may be built and run under less
# stringent environments than integration tests.
#
# Interface to module:
# ENABLE_INTEGRATION_TESTS:   used in makefiles to conditionally build tests
# enable_integration_tests:   used in configure.ac for additional configuration
# --enable-integration-tests: 'yes' user instructs the module to build tests
#                             'no' user instructs the module not to build tests
# parm1:                      specify the default value, yes or no.
#
AC_DEFUN([XORG_ENABLE_INTEGRATION_TESTS],[
AC_REQUIRE([XORG_MEMORY_CHECK_FLAGS])
m4_define([_defopt], m4_default([$1], [auto]))
AC_ARG_ENABLE(integration-tests, AS_HELP_STRING([--enable-integration-tests],
	[Enable building integration test cases (default: ]_defopt[)]),
	[enable_integration_tests=$enableval],
	[enable_integration_tests=]_defopt)
m4_undefine([_defopt])
AM_CONDITIONAL([ENABLE_INTEGRATION_TESTS],
	[test "x$enable_integration_tests" != xno])
AC_MSG_CHECKING([whether to build unit test cases])
AC_MSG_RESULT([$enable_integration_tests])
]) # XORG_ENABLE_INTEGRATION_TESTS

# XORG_WITH_GLIB([MIN-VERSION], [DEFAULT])
# ----------------------------------------
# Minimum version: 1.13.0
#
# GLib is a library which provides advanced data structures and functions.
# This macro enables a module to test for the presence of Glib.
#
# When used with ENABLE_UNIT_TESTS, it is assumed GLib is used for unit testing.
# Otherwise the value of $enable_unit_tests is blank.
#
# Please see XORG_ENABLE_INTEGRATION_TESTS for integration test support. Unit
# test support usually requires less dependencies and may be built and run under
# less stringent environments than integration tests.
#
# Interface to module:
# HAVE_GLIB: used in makefiles to conditionally build targets
# with_glib: used in configure.ac to know if GLib has been found
# --with-glib:	'yes' user instructs the module to use glib
#		'no' user instructs the module not to use glib
#
AC_DEFUN([XORG_WITH_GLIB],[
AC_REQUIRE([PKG_PROG_PKG_CONFIG])
m4_define([_defopt], m4_default([$2], [auto]))
AC_ARG_WITH(glib, AS_HELP_STRING([--with-glib],
	[Use GLib library for unit testing (default: ]_defopt[)]),
	[with_glib=$withval], [with_glib=]_defopt)
m4_undefine([_defopt])

have_glib=no
# Do not probe GLib if user explicitly disabled unit testing
if test "x$enable_unit_tests" != x"no"; then
  # Do not probe GLib if user explicitly disabled it
  if test "x$with_glib" != x"no"; then
    m4_ifval(
      [$1],
      [PKG_CHECK_MODULES([GLIB], [glib-2.0 >= $1], [have_glib=yes], [have_glib=no])],
      [PKG_CHECK_MODULES([GLIB], [glib-2.0], [have_glib=yes], [have_glib=no])]
    )
  fi
fi

# Not having GLib when unit testing has been explicitly requested is an error
if test "x$enable_unit_tests" = x"yes"; then
  if test "x$have_glib" = x"no"; then
    AC_MSG_ERROR([--enable-unit-tests=yes specified but glib-2.0 not found])
  fi
fi

# Having unit testing disabled when GLib has been explicitly requested is an error
if test "x$enable_unit_tests" = x"no"; then
  if test "x$with_glib" = x"yes"; then
    AC_MSG_ERROR([--enable-unit-tests=yes specified but glib-2.0 not found])
  fi
fi

# Not having GLib when it has been explicitly requested is an error
if test "x$with_glib" = x"yes"; then
  if test "x$have_glib" = x"no"; then
    AC_MSG_ERROR([--with-glib=yes specified but glib-2.0 not found])
  fi
fi

AM_CONDITIONAL([HAVE_GLIB], [test "$have_glib" = yes])
]) # XORG_WITH_GLIB

# XORG_LD_WRAP([required|optional])
# ---------------------------------
# Minimum version: 1.13.0
#
# Check if linker supports -wrap, passed via compiler flags
#
# When used with ENABLE_UNIT_TESTS, it is assumed -wrap is used for unit testing.
# Otherwise the value of $enable_unit_tests is blank.
#
# Argument added in 1.16.0 - default is "required", to match existing behavior
# of returning an error if enable_unit_tests is yes, and ld -wrap is not
# available, an argument of "optional" allows use when some unit tests require
# ld -wrap and others do not.
#
AC_DEFUN([XORG_LD_WRAP],[
XORG_CHECK_LINKER_FLAGS([-Wl,-wrap,exit],[have_ld_wrap=yes],[have_ld_wrap=no],
    [AC_LANG_PROGRAM([#include <stdlib.h>
                      void __wrap_exit(int status) { return; }],
                     [exit(0);])])
# Not having ld wrap when unit testing has been explicitly requested is an error
if test "x$enable_unit_tests" = x"yes" -a "x$1" != "xoptional"; then
  if test "x$have_ld_wrap" = x"no"; then
    AC_MSG_ERROR([--enable-unit-tests=yes specified but ld -wrap support is not available])
  fi
fi
AM_CONDITIONAL([HAVE_LD_WRAP], [test "$have_ld_wrap" = yes])
#
]) # XORG_LD_WRAP

# XORG_CHECK_LINKER_FLAGS
# -----------------------
# SYNOPSIS
#
#   XORG_CHECK_LINKER_FLAGS(FLAGS, [ACTION-SUCCESS], [ACTION-FAILURE], [PROGRAM-SOURCE])
#
# DESCRIPTION
#
#   Check whether the given linker FLAGS work with the current language's
#   linker, or whether they give an error.
#
#   ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
#   success/failure.
#
#   PROGRAM-SOURCE is the program source to link with, if needed
#
#   NOTE: Based on AX_CHECK_COMPILER_FLAGS.
#
# LICENSE
#
#   Copyright (c) 2009 Mike Frysinger <vapier@gentoo.org>
#   Copyright (c) 2009 Steven G. Johnson <stevenj@alum.mit.edu>
#   Copyright (c) 2009 Matteo Frigo
#
#   This program is free software: you can redistribute it and/or modify it
#   under the terms of the GNU General Public License as published by the
#   Free Software Foundation, either version 3 of the License, or (at your
#   option) any later version.
#
#   This program is distributed in the hope that it will be useful, but
#   WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
#   Public License for more details.
#
#   You should have received a copy of the GNU General Public License along
#   with this program. If not, see <http://www.gnu.org/licenses/>.
#
#   As a special exception, the respective Autoconf Macro's copyright owner
#   gives unlimited permission to copy, distribute and modify the configure
#   scripts that are the output of Autoconf when processing the Macro. You
#   need not follow the terms of the GNU General Public License when using
#   or distributing such scripts, even though portions of the text of the
#   Macro appear in them. The GNU General Public License (GPL) does govern
#   all other use of the material that constitutes the Autoconf Macro.
#
#   This special exception to the GPL applies to versions of the Autoconf
#   Macro released by the Autoconf Archive. When you make and distribute a
#   modified version of the Autoconf Macro, you may extend this special
#   exception to the GPL to apply to your modified version as well.#
AC_DEFUN([XORG_CHECK_LINKER_FLAGS],
[AC_MSG_CHECKING([whether the linker accepts $1])
dnl Some hackery here since AC_CACHE_VAL can't handle a non-literal varname:
AS_LITERAL_IF([$1],
  [AC_CACHE_VAL(AS_TR_SH(xorg_cv_linker_flags_[$1]), [
      ax_save_FLAGS=$LDFLAGS
      LDFLAGS="$1"
      AC_LINK_IFELSE([m4_default([$4],[AC_LANG_PROGRAM()])],
        AS_TR_SH(xorg_cv_linker_flags_[$1])=yes,
        AS_TR_SH(xorg_cv_linker_flags_[$1])=no)
      LDFLAGS=$ax_save_FLAGS])],
  [ax_save_FLAGS=$LDFLAGS
   LDFLAGS="$1"
   AC_LINK_IFELSE([AC_LANG_PROGRAM()],
     eval AS_TR_SH(xorg_cv_linker_flags_[$1])=yes,
     eval AS_TR_SH(xorg_cv_linker_flags_[$1])=no)
   LDFLAGS=$ax_save_FLAGS])
eval xorg_check_linker_flags=$AS_TR_SH(xorg_cv_linker_flags_[$1])
AC_MSG_RESULT($xorg_check_linker_flags)
if test "x$xorg_check_linker_flags" = xyes; then
	m4_default([$2], :)
else
	m4_default([$3], :)
fi
]) # XORG_CHECK_LINKER_FLAGS

# XORG_MEMORY_CHECK_FLAGS
# -----------------------
# Minimum version: 1.16.0
#
# This macro attempts to find appropriate memory checking functionality
# for various platforms which unit testing code may use to catch various
# forms of memory allocation and access errors in testing.
#
# Interface to module:
# XORG_MALLOC_DEBUG_ENV - environment variables to set to enable debugging
#                         Usually added to TESTS_ENVIRONMENT in Makefile.am
#
# If the user sets the value of XORG_MALLOC_DEBUG_ENV, it is used verbatim.
#
AC_DEFUN([XORG_MEMORY_CHECK_FLAGS],[

AC_REQUIRE([AC_CANONICAL_HOST])
AC_ARG_VAR([XORG_MALLOC_DEBUG_ENV],
           [Environment variables to enable memory checking in tests])

# Check for different types of support on different platforms
case $host_os in
    solaris*)
        AC_CHECK_LIB([umem], [umem_alloc],
            [malloc_debug_env='LD_PRELOAD=libumem.so UMEM_DEBUG=default'])
        ;;
    *-gnu*) # GNU libc - Value is used as a single byte bit pattern,
        # both directly and inverted, so should not be 0 or 255.
        malloc_debug_env='MALLOC_PERTURB_=15'
        ;;
    darwin*)
        malloc_debug_env='MallocPreScribble=1 MallocScribble=1 DYLD_INSERT_LIBRARIES=/usr/lib/libgmalloc.dylib'
        ;;
    *bsd*)
        malloc_debug_env='MallocPreScribble=1 MallocScribble=1'
        ;;
esac

# User supplied flags override default flags
if test "x$XORG_MALLOC_DEBUG_ENV" != "x"; then
    malloc_debug_env="$XORG_MALLOC_DEBUG_ENV"
fi

AC_SUBST([XORG_MALLOC_DEBUG_ENV],[$malloc_debug_env])
]) # XORG_WITH_LINT

# XORG_CHECK_MALLOC_ZERO
# ----------------------
# Minimum version: 1.0.0
#
# Defines {MALLOC,XMALLOC,XTMALLOC}_ZERO_CFLAGS appropriately if
# malloc(0) returns NULL.  Packages should add one of these cflags to
# their AM_CFLAGS (or other appropriate *_CFLAGS) to use them.
AC_DEFUN([XORG_CHECK_MALLOC_ZERO],[
AC_ARG_ENABLE(malloc0returnsnull,
	AS_HELP_STRING([--enable-malloc0returnsnull],
		       [malloc(0) returns NULL (default: auto)]),
	[MALLOC_ZERO_RETURNS_NULL=$enableval],
	[MALLOC_ZERO_RETURNS_NULL=auto])

AC_MSG_CHECKING([whether malloc(0) returns NULL])
if test "x$MALLOC_ZERO_RETURNS_NULL" = xauto; then
AC_CACHE_VAL([xorg_cv_malloc0_returns_null],
	[AC_RUN_IFELSE([AC_LANG_PROGRAM([
#include <stdlib.h>
],[
    char *m0, *r0, *c0, *p;
    m0 = malloc(0);
    p = malloc(10);
    r0 = realloc(p,0);
    c0 = calloc(0,10);
    exit((m0 == 0 || r0 == 0 || c0 == 0) ? 0 : 1);
])],
		[xorg_cv_malloc0_returns_null=yes],
		[xorg_cv_malloc0_returns_null=no])])
MALLOC_ZERO_RETURNS_NULL=$xorg_cv_malloc0_returns_null
fi
AC_MSG_RESULT([$MALLOC_ZERO_RETURNS_NULL])

if test "x$MALLOC_ZERO_RETURNS_NULL" = xyes; then
	MALLOC_ZERO_CFLAGS="-DMALLOC_0_RETURNS_NULL"
	XMALLOC_ZERO_CFLAGS=$MALLOC_ZERO_CFLAGS
	XTMALLOC_ZERO_CFLAGS="$MALLOC_ZERO_CFLAGS -DXTMALLOC_BC"
else
	MALLOC_ZERO_CFLAGS=""
	XMALLOC_ZERO_CFLAGS=""
	XTMALLOC_ZERO_CFLAGS=""
fi

AC_SUBST([MALLOC_ZERO_CFLAGS])
AC_SUBST([XMALLOC_ZERO_CFLAGS])
AC_SUBST([XTMALLOC_ZERO_CFLAGS])
]) # XORG_CHECK_MALLOC_ZERO

# XORG_WITH_LINT()
# ----------------
# Minimum version: 1.1.0
#
# This macro enables the use of a tool that flags some suspicious and
# non-portable constructs (likely to be bugs) in C language source code.
# It will attempt to locate the tool and use appropriate options.
# There are various lint type tools on different platforms.
#
# Interface to module:
# LINT:		returns the path to the tool found on the platform
#		or the value set to LINT on the configure cmd line
#		also an Automake conditional
# LINT_FLAGS:	an Automake variable with appropriate flags
#
# --with-lint:	'yes' user instructs the module to use lint
#		'no' user instructs the module not to use lint (default)
#
# If the user sets the value of LINT, AC_PATH_PROG skips testing the path.
# If the user sets the value of LINT_FLAGS, they are used verbatim.
#
AC_DEFUN([XORG_WITH_LINT],[

AC_ARG_VAR([LINT], [Path to a lint-style command])
AC_ARG_VAR([LINT_FLAGS], [Flags for the lint-style command])
AC_ARG_WITH(lint, [AS_HELP_STRING([--with-lint],
		[Use a lint-style source code checker (default: disabled)])],
		[use_lint=$withval], [use_lint=no])

# Obtain platform specific info like program name and options
# The lint program on FreeBSD and NetBSD is different from the one on Solaris
case $host_os in
  *linux* | *openbsd* | kfreebsd*-gnu | darwin* | cygwin*)
	lint_name=splint
	lint_options="-badflag"
	;;
  *freebsd* | *netbsd*)
	lint_name=lint
	lint_options="-u -b"
	;;
  *solaris*)
	lint_name=lint
	lint_options="-u -b -h -erroff=E_INDISTING_FROM_TRUNC2"
	;;
esac

# Test for the presence of the program (either guessed by the code or spelled out by the user)
if test "x$use_lint" = x"yes" ; then
   AC_PATH_PROG([LINT], [$lint_name])
   if test "x$LINT" = "x"; then
        AC_MSG_ERROR([--with-lint=yes specified but lint-style tool not found in PATH])
   fi
elif test "x$use_lint" = x"no" ; then
   if test "x$LINT" != "x"; then
      AC_MSG_WARN([ignoring LINT environment variable since --with-lint=no was specified])
   fi
else
   AC_MSG_ERROR([--with-lint expects 'yes' or 'no'. Use LINT variable to specify path.])
fi

# User supplied flags override default flags
if test "x$LINT_FLAGS" != "x"; then
   lint_options=$LINT_FLAGS
fi

AC_SUBST([LINT_FLAGS],[$lint_options])
AM_CONDITIONAL(LINT, [test "x$LINT" != x])

]) # XORG_WITH_LINT

# XORG_LINT_LIBRARY(LIBNAME)
# --------------------------
# Minimum version: 1.1.0
#
# Sets up flags for building lint libraries for checking programs that call
# functions in the library.
#
# Interface to module:
# LINTLIB		- Automake variable with the name of lint library file to make
# MAKE_LINT_LIB		- Automake conditional
#
# --enable-lint-library:  - 'yes' user instructs the module to created a lint library
#			  - 'no' user instructs the module not to create a lint library (default)

AC_DEFUN([XORG_LINT_LIBRARY],[
AC_REQUIRE([XORG_WITH_LINT])
AC_ARG_ENABLE(lint-library, [AS_HELP_STRING([--enable-lint-library],
	[Create lint library (default: disabled)])],
	[make_lint_lib=$enableval], [make_lint_lib=no])

if test "x$make_lint_lib" = x"yes" ; then
   LINTLIB=llib-l$1.ln
   if test "x$LINT" = "x"; then
        AC_MSG_ERROR([Cannot make lint library without --with-lint])
   fi
elif test "x$make_lint_lib" != x"no" ; then
   AC_MSG_ERROR([--enable-lint-library expects 'yes' or 'no'.])
fi

AC_SUBST(LINTLIB)
AM_CONDITIONAL(MAKE_LINT_LIB, [test x$make_lint_lib != xno])

]) # XORG_LINT_LIBRARY

# XORG_COMPILER_BRAND
# -------------------
# Minimum version: 1.14.0
#
# Checks for various brands of compilers and sets flags as appropriate:
#   GNU gcc - relies on AC_PROG_CC (via AC_PROG_CC_C99) to set GCC to "yes"
#   GNU g++ - relies on AC_PROG_CXX to set GXX to "yes"
#   clang compiler - sets CLANGCC to "yes"
#   Intel compiler - sets INTELCC to "yes"
#   Sun/Oracle Solaris Studio cc - sets SUNCC to "yes"
#
AC_DEFUN([XORG_COMPILER_BRAND], [
AC_LANG_CASE(
	[C], [
		AC_REQUIRE([AC_PROG_CC_C99])
	],
	[C++], [
		AC_REQUIRE([AC_PROG_CXX])
	]
)
AC_CHECK_DECL([__clang__], [CLANGCC="yes"], [CLANGCC="no"])
AC_CHECK_DECL([__INTEL_COMPILER], [INTELCC="yes"], [INTELCC="no"])
AC_CHECK_DECL([__SUNPRO_C], [SUNCC="yes"], [SUNCC="no"])
]) # XORG_COMPILER_BRAND

# XORG_TESTSET_CFLAG(<variable>, <flag>, [<alternative flag>, ...])
# ---------------
# Minimum version: 1.16.0
#
# Test if the compiler works when passed the given flag as a command line argument.
# If it succeeds, the flag is appeneded to the given variable.  If not, it tries the
# next flag in the list until there are no more options.
#
# Note that this does not guarantee that the compiler supports the flag as some
# compilers will simply ignore arguments that they do not understand, but we do
# attempt to weed out false positives by using -Werror=unknown-warning-option and
# -Werror=unused-command-line-argument
#
AC_DEFUN([XORG_TESTSET_CFLAG], [
m4_if([$#], 0, [m4_fatal([XORG_TESTSET_CFLAG was given with an unsupported number of arguments])])
m4_if([$#], 1, [m4_fatal([XORG_TESTSET_CFLAG was given with an unsupported number of arguments])])

AC_LANG_COMPILER_REQUIRE

AC_LANG_CASE(
	[C], [
		AC_REQUIRE([AC_PROG_CC_C99])
		define([PREFIX], [C])
		define([CACHE_PREFIX], [cc])
		define([COMPILER], [$CC])
	],
	[C++], [
		define([PREFIX], [CXX])
		define([CACHE_PREFIX], [cxx])
		define([COMPILER], [$CXX])
	]
)

[xorg_testset_save_]PREFIX[FLAGS]="$PREFIX[FLAGS]"

if test "x$[xorg_testset_]CACHE_PREFIX[_unknown_warning_option]" = "x" ; then
	PREFIX[FLAGS]="$PREFIX[FLAGS] -Werror=unknown-warning-option"
	AC_CACHE_CHECK([if ]COMPILER[ supports -Werror=unknown-warning-option],
			[xorg_cv_]CACHE_PREFIX[_flag_unknown_warning_option],
			AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
					  [xorg_cv_]CACHE_PREFIX[_flag_unknown_warning_option=yes],
					  [xorg_cv_]CACHE_PREFIX[_flag_unknown_warning_option=no]))
	[xorg_testset_]CACHE_PREFIX[_unknown_warning_option]=$[xorg_cv_]CACHE_PREFIX[_flag_unknown_warning_option]
	PREFIX[FLAGS]="$[xorg_testset_save_]PREFIX[FLAGS]"
fi

if test "x$[xorg_testset_]CACHE_PREFIX[_unused_command_line_argument]" = "x" ; then
	if test "x$[xorg_testset_]CACHE_PREFIX[_unknown_warning_option]" = "xyes" ; then
		PREFIX[FLAGS]="$PREFIX[FLAGS] -Werror=unknown-warning-option"
	fi
	PREFIX[FLAGS]="$PREFIX[FLAGS] -Werror=unused-command-line-argument"
	AC_CACHE_CHECK([if ]COMPILER[ supports -Werror=unused-command-line-argument],
			[xorg_cv_]CACHE_PREFIX[_flag_unused_command_line_argument],
			AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
					  [xorg_cv_]CACHE_PREFIX[_flag_unused_command_line_argument=yes],
					  [xorg_cv_]CACHE_PREFIX[_flag_unused_command_line_argument=no]))
	[xorg_testset_]CACHE_PREFIX[_unused_command_line_argument]=$[xorg_cv_]CACHE_PREFIX[_flag_unused_command_line_argument]
	PREFIX[FLAGS]="$[xorg_testset_save_]PREFIX[FLAGS]"
fi

found="no"
m4_foreach([flag], m4_cdr($@), [
	if test $found = "no" ; then
		if test "x$xorg_testset_]CACHE_PREFIX[_unknown_warning_option" = "xyes" ; then
			PREFIX[FLAGS]="$PREFIX[FLAGS] -Werror=unknown-warning-option"
		fi

		if test "x$xorg_testset_]CACHE_PREFIX[_unused_command_line_argument" = "xyes" ; then
			PREFIX[FLAGS]="$PREFIX[FLAGS] -Werror=unused-command-line-argument"
		fi

		PREFIX[FLAGS]="$PREFIX[FLAGS] ]flag["

dnl Some hackery here since AC_CACHE_VAL can't handle a non-literal varname
		AC_MSG_CHECKING([if ]COMPILER[ supports ]flag[])
		cacheid=AS_TR_SH([xorg_cv_]CACHE_PREFIX[_flag_]flag[])
		AC_CACHE_VAL($cacheid,
			     [AC_LINK_IFELSE([AC_LANG_PROGRAM([int i;])],
					     [eval $cacheid=yes],
					     [eval $cacheid=no])])

		PREFIX[FLAGS]="$[xorg_testset_save_]PREFIX[FLAGS]"

		eval supported=\$$cacheid
		AC_MSG_RESULT([$supported])
		if test "$supported" = "yes" ; then
			$1="$$1 ]flag["
			found="yes"
		fi
	fi
])
]) # XORG_TESTSET_CFLAG

# XORG_COMPILER_FLAGS
# ---------------
# Minimum version: 1.16.0
#
# Defines BASE_CFLAGS or BASE_CXXFLAGS to contain a set of command line
# arguments supported by the selected compiler which do NOT alter the generated
# code.  These arguments will cause the compiler to print various warnings
# during compilation AND turn a conservative set of warnings into errors.
#
# The set of flags supported by BASE_CFLAGS and BASE_CXXFLAGS will grow in
# future versions of util-macros as options are added to new compilers.
#
AC_DEFUN([XORG_COMPILER_FLAGS], [
AC_REQUIRE([XORG_COMPILER_BRAND])

AC_ARG_ENABLE(selective-werror,
              AS_HELP_STRING([--disable-selective-werror],
                             [Turn off selective compiler errors. (default: enabled)]),
              [SELECTIVE_WERROR=$enableval],
              [SELECTIVE_WERROR=yes])

AC_LANG_CASE(
        [C], [
                define([PREFIX], [C])
        ],
        [C++], [
                define([PREFIX], [CXX])
        ]
)
# -v is too short to test reliably with XORG_TESTSET_CFLAG
if test "x$SUNCC" = "xyes"; then
    [BASE_]PREFIX[FLAGS]="-v"
else
    [BASE_]PREFIX[FLAGS]=""
fi

# This chunk of warnings were those that existed in the legacy CWARNFLAGS
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wall])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wpointer-arith])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wmissing-declarations])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wformat=2], [-Wformat])

AC_LANG_CASE(
	[C], [
		XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wstrict-prototypes])
		XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wmissing-prototypes])
		XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wnested-externs])
		XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wbad-function-cast])
		XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wold-style-definition], [-fd])
		XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wdeclaration-after-statement])
	]
)

# This chunk adds additional warnings that could catch undesired effects.
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wunused])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wuninitialized])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wshadow])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wmissing-noreturn])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wmissing-format-attribute])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wredundant-decls])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wlogical-op])

# These are currently disabled because they are noisy.  They will be enabled
# in the future once the codebase is sufficiently modernized to silence
# them.  For now, I don't want them to drown out the other warnings.
# XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wparentheses])
# XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wcast-align])
# XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wcast-qual])

# Turn some warnings into errors, so we don't accidently get successful builds
# when there are problems that should be fixed.

if test "x$SELECTIVE_WERROR" = "xyes" ; then
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=implicit], [-errwarn=E_NO_EXPLICIT_TYPE_GIVEN -errwarn=E_NO_IMPLICIT_DECL_ALLOWED])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=nonnull])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=init-self])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=main])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=missing-braces])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=sequence-point])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=return-type], [-errwarn=E_FUNC_HAS_NO_RETURN_STMT])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=trigraphs])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=array-bounds])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=write-strings])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=address])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=int-to-pointer-cast], [-errwarn=E_BAD_PTR_INT_COMBINATION])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Werror=pointer-to-int-cast]) # Also -errwarn=E_BAD_PTR_INT_COMBINATION
else
AC_MSG_WARN([You have chosen not to turn some select compiler warnings into errors.  This should not be necessary.  Please report why you needed to do so in a bug report at $PACKAGE_BUGREPORT])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wimplicit])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wnonnull])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Winit-self])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wmain])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wmissing-braces])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wsequence-point])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wreturn-type])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wtrigraphs])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Warray-bounds])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wwrite-strings])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Waddress])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wint-to-pointer-cast])
XORG_TESTSET_CFLAG([[BASE_]PREFIX[FLAGS]], [-Wpointer-to-int-cast])
fi

AC_SUBST([BASE_]PREFIX[FLAGS])
]) # XORG_COMPILER_FLAGS

# XORG_CWARNFLAGS
# ---------------
# Minimum version: 1.2.0
# Deprecated since: 1.16.0 (Use XORG_COMPILER_FLAGS instead)
#
# Defines CWARNFLAGS to enable C compiler warnings.
#
# This function is deprecated because it defines -fno-strict-aliasing
# which alters the code generated by the compiler.  If -fno-strict-aliasing
# is needed, then it should be added explicitly in the module when
# it is updated to use BASE_CFLAGS.
#
AC_DEFUN([XORG_CWARNFLAGS], [
AC_REQUIRE([XORG_COMPILER_FLAGS])
AC_REQUIRE([XORG_COMPILER_BRAND])
AC_LANG_CASE(
	[C], [
		CWARNFLAGS="$BASE_CFLAGS"
		if  test "x$GCC" = xyes ; then
		    CWARNFLAGS="$CWARNFLAGS -fno-strict-aliasing"
		fi
		AC_SUBST(CWARNFLAGS)
	]
)
]) # XORG_CWARNFLAGS

# XORG_STRICT_OPTION
# -----------------------
# Minimum version: 1.3.0
#
# Add configure option to enable strict compilation flags, such as treating
# warnings as fatal errors.
# If --enable-strict-compilation is passed to configure, adds strict flags to
# $BASE_CFLAGS or $BASE_CXXFLAGS and the deprecated $CWARNFLAGS.
#
# Starting in 1.14.0 also exports $STRICT_CFLAGS for use in other tests or
# when strict compilation is unconditionally desired.
AC_DEFUN([XORG_STRICT_OPTION], [
AC_REQUIRE([XORG_CWARNFLAGS])
AC_REQUIRE([XORG_COMPILER_FLAGS])

AC_ARG_ENABLE(strict-compilation,
			  AS_HELP_STRING([--enable-strict-compilation],
			  [Enable all warnings from compiler and make them errors (default: disabled)]),
			  [STRICT_COMPILE=$enableval], [STRICT_COMPILE=no])

AC_LANG_CASE(
        [C], [
                define([PREFIX], [C])
        ],
        [C++], [
                define([PREFIX], [CXX])
        ]
)

[STRICT_]PREFIX[FLAGS]=""
XORG_TESTSET_CFLAG([[STRICT_]PREFIX[FLAGS]], [-pedantic])
XORG_TESTSET_CFLAG([[STRICT_]PREFIX[FLAGS]], [-Werror], [-errwarn])

# Earlier versions of gcc (eg: 4.2) support -Werror=attributes, but do not
# activate it with -Werror, so we add it here explicitly.
XORG_TESTSET_CFLAG([[STRICT_]PREFIX[FLAGS]], [-Werror=attributes])

if test "x$STRICT_COMPILE" = "xyes"; then
    [BASE_]PREFIX[FLAGS]="$[BASE_]PREFIX[FLAGS] $[STRICT_]PREFIX[FLAGS]"
    AC_LANG_CASE([C], [CWARNFLAGS="$CWARNFLAGS $STRICT_CFLAGS"])
fi
AC_SUBST([STRICT_]PREFIX[FLAGS])
AC_SUBST([BASE_]PREFIX[FLAGS])
AC_LANG_CASE([C], AC_SUBST([CWARNFLAGS]))
]) # XORG_STRICT_OPTION

# XORG_DEFAULT_OPTIONS
# --------------------
# Minimum version: 1.3.0
#
# Defines default options for X.Org modules.
#
AC_DEFUN([XORG_DEFAULT_OPTIONS], [
AC_REQUIRE([AC_PROG_INSTALL])
XORG_COMPILER_FLAGS
XORG_CWARNFLAGS
XORG_STRICT_OPTION
XORG_RELEASE_VERSION
XORG_CHANGELOG
XORG_INSTALL
XORG_MANPAGE_SECTIONS
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])],
    [AC_SUBST([AM_DEFAULT_VERBOSITY], [1])])
]) # XORG_DEFAULT_OPTIONS

# XORG_INSTALL()
# ----------------
# Minimum version: 1.4.0
#
# Defines the variable INSTALL_CMD as the command to copy
# INSTALL from $prefix/share/util-macros.
#
AC_DEFUN([XORG_INSTALL], [
AC_REQUIRE([PKG_PROG_PKG_CONFIG])
macros_datadir=`$PKG_CONFIG --print-errors --variable=pkgdatadir xorg-macros`
INSTALL_CMD="(cp -f "$macros_datadir/INSTALL" \$(top_srcdir)/.INSTALL.tmp && \
mv \$(top_srcdir)/.INSTALL.tmp \$(top_srcdir)/INSTALL) \
|| (rm -f \$(top_srcdir)/.INSTALL.tmp; touch \$(top_srcdir)/INSTALL; \
echo 'util-macros \"pkgdatadir\" from xorg-macros.pc not found: installing possibly empty INSTALL.' >&2)"
AC_SUBST([INSTALL_CMD])
]) # XORG_INSTALL
dnl Copyright 2005 Red Hat, Inc
dnl
dnl Permission to use, copy, modify, distribute, and sell this software and its
dnl documentation for any purpose is hereby granted without fee, provided that
dnl the above copyright notice appear in all copies and that both that
dnl copyright notice and this permission notice appear in supporting
dnl documentation.
dnl
dnl The above copyright notice and this permission notice shall be included
dnl in all copies or substantial portions of the Software.
dnl
dnl THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
dnl OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
dnl MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
dnl IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
dnl OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
dnl ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
dnl OTHER DEALINGS IN THE SOFTWARE.
dnl
dnl Except as contained in this notice, the name of the copyright holders shall
dnl not be used in advertising or otherwise to promote the sale, use or
dnl other dealings in this Software without prior written authorization
dnl from the copyright holders.
dnl

# XORG_RELEASE_VERSION
# --------------------
# Defines PACKAGE_VERSION_{MAJOR,MINOR,PATCHLEVEL} for modules to use.

AC_DEFUN([XORG_RELEASE_VERSION],[
	AC_DEFINE_UNQUOTED([PACKAGE_VERSION_MAJOR],
		[`echo $PACKAGE_VERSION | cut -d . -f 1`],
		[Major version of this package])
	PVM=`echo $PACKAGE_VERSION | cut -d . -f 2 | cut -d - -f 1`
	if test "x$PVM" = "x"; then
		PVM="0"
	fi
	AC_DEFINE_UNQUOTED([PACKAGE_VERSION_MINOR],
		[$PVM],
		[Minor version of this package])
	PVP=`echo $PACKAGE_VERSION | cut -d . -f 3 | cut -d - -f 1`
	if test "x$PVP" = "x"; then
		PVP="0"
	fi
	AC_DEFINE_UNQUOTED([PACKAGE_VERSION_PATCHLEVEL],
		[$PVP],
		[Patch version of this package])
])

# XORG_CHANGELOG()
# ----------------
# Minimum version: 1.2.0
#
# Defines the variable CHANGELOG_CMD as the command to generate
# ChangeLog from git.
#
#
AC_DEFUN([XORG_CHANGELOG], [
CHANGELOG_CMD="(GIT_DIR=\$(top_srcdir)/.git git log > \$(top_srcdir)/.changelog.tmp && \
mv \$(top_srcdir)/.changelog.tmp \$(top_srcdir)/ChangeLog) \
|| (rm -f \$(top_srcdir)/.changelog.tmp; touch \$(top_srcdir)/ChangeLog; \
echo 'git directory not found: installing possibly empty changelog.' >&2)"
AC_SUBST([CHANGELOG_CMD])
]) # XORG_CHANGELOG

# Copyright (C) 2002-2014 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# AM_AUTOMAKE_VERSION(VERSION)
# ----------------------------
# Automake X.Y traces this macro to ensure aclocal.m4 has been
# generated from the m4 files accompanying Automake X.Y.
# (This private macro should not be called outside this file.)
AC_DEFUN([AM_AUTOMAKE_VERSION],
[am__api_version='1.15'
dnl Some users find AM_AUTOMAKE_VERSION and mistake it for a way to
dnl require some minimum version.  Point them to the right macro.
m4_if([$1], [1.15], [],
      [AC_FATAL([Do not call $0, use AM_INIT_AUTOMAKE([$1]).])])dnl
])

# _AM_AUTOCONF_VERSION(VERSION)
# -----------------------------
# aclocal traces this macro to find the Autoconf version.
# This is a private macro too.  Using m4_define simplifies
# the logic in aclocal, which can simply ignore this definition.
m4_define([_AM_AUTOCONF_VERSION], [])

# AM_SET_CURRENT_AUTOMAKE_VERSION
# -------------------------------
# Call AM_AUTOMAKE_VERSION and AM_AUTOMAKE_VERSION so they can be traced.
# This function is AC_REQUIREd by AM_INIT_AUTOMAKE.
AC_DEFUN([AM_SET_CURRENT_AUTOMAKE_VERSION],
[AM_AUTOMAKE_VERSION([1.15])dnl
m4_ifndef([AC_AUTOCONF_VERSION],
  [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl
_AM_AUTOCONF_VERSION(m4_defn([AC_AUTOCONF_VERSION]))])

# AM_AUX_DIR_EXPAND                                         -*- Autoconf -*-

# Copyright (C) 2001-2014 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# For projects using AC_CONFIG_AUX_DIR([foo]), Autoconf sets
# $ac_aux_dir to '$srcdir/foo'.  In other projects, it is set to
# '$srcdir', '$srcdir/..', or '$srcdir/../..'.
#
# Of course, Automake must honor this variable whenever it calls a
# tool from the auxiliary directory.  The problem is that $srcdir (and
# therefore $ac_aux_dir as well) can be either absolute or relative,
# depending on how configure is run.  This is pretty annoying, since
# it makes $ac_aux_dir quite unusable in subdirectories: in the top
# source directory, any form will work fine, but in subdirectories a
# relative path needs to be adjusted first.
#
# $ac_aux_dir/missing
#    fails when called from a subdirectory if $ac_aux_dir is relative
# $top_srcdir/$ac_aux_dir/missing
#    fails if $ac_aux_dir is absolute,
#    fails when called from a subdirectory in a VPATH build with
#          a relative $ac_aux_dir
#
# The reason of the latter failure is that $top_srcdir and $ac_aux_dir
# are both prefixed by $srcdir.  In an in-source build this is usually
# harmless because $srcdir is '.', but things will broke when you
# start a VPATH build or use an absolute $srcdir.
#
# So we could use something similar to $top_srcdir/$ac_aux_dir/missing,
# iff we strip the leading $srcdir from $ac_aux_dir.  That would be:
#   am_aux_dir='\$(top_srcdir)/'`expr "$ac_aux_dir" : "$srcdir//*\(.*\)"`
# and then we would define $MISSING as
#   MISSING="\${SHELL} $am_aux_dir/missing"
# This will work as long as MISSING is not called from configure, because
# unfortunately $(top_srcdir) has no meaning in configure.
# However there are other variables, like CC, which are often used in
# configure, and could therefore not use this "fixed" $ac_aux_dir.
#
# Another solution, used here, is to always expand $ac_aux_dir to an
# absolute PATH.  The drawback is that using absolute paths prevent a
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AC_DEFUN([AM_AUX_DIR_EXPAND],
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# Generate code to set up dependency tracking.              -*- Autoconf -*-

# Copyright (C) 1999-2014 Free Software Foundation, Inc.
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# This file is free software; the Free Software Foundation
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# Copyright (C) 1997-2014 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# AM_MISSING_PROG(NAME, PROGRAM)
# ------------------------------
AC_DEFUN([AM_MISSING_PROG],
[AC_REQUIRE([AM_MISSING_HAS_RUN])
$1=${$1-"${am_missing_run}$2"}
AC_SUBST($1)])

# AM_MISSING_HAS_RUN
# ------------------
# Define MISSING if not defined so far and test if it is modern enough.
# If it is, set am_missing_run to use it, otherwise, to nothing.
AC_DEFUN([AM_MISSING_HAS_RUN],
[AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
AC_REQUIRE_AUX_FILE([missing])dnl
if test x"${MISSING+set}" != xset; then
  case $am_aux_dir in
  *\ * | *\	*)
    MISSING="\${SHELL} \"$am_aux_dir/missing\"" ;;
  *)
    MISSING="\${SHELL} $am_aux_dir/missing" ;;
  esac
fi
# Use eval to expand $SHELL
if eval "$MISSING --is-lightweight"; then
  am_missing_run="$MISSING "
else
  am_missing_run=
  AC_MSG_WARN(['missing' script is too old or missing])
fi
])

# Helper functions for option handling.                     -*- Autoconf -*-

# Copyright (C) 2001-2014 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# _AM_MANGLE_OPTION(NAME)
# -----------------------
AC_DEFUN([_AM_MANGLE_OPTION],
[[_AM_OPTION_]m4_bpatsubst($1, [[^a-zA-Z0-9_]], [_])])

# _AM_SET_OPTION(NAME)
# --------------------
# Set option NAME.  Presently that only means defining a flag for this option.
AC_DEFUN([_AM_SET_OPTION],
[m4_define(_AM_MANGLE_OPTION([$1]), [1])])

# _AM_SET_OPTIONS(OPTIONS)
# ------------------------
# OPTIONS is a space-separated list of Automake options.
AC_DEFUN([_AM_SET_OPTIONS],
[m4_foreach_w([_AM_Option], [$1], [_AM_SET_OPTION(_AM_Option)])])

# _AM_IF_OPTION(OPTION, IF-SET, [IF-NOT-SET])
# -------------------------------------------
# Execute IF-SET if OPTION is set, IF-NOT-SET otherwise.
AC_DEFUN([_AM_IF_OPTION],
[m4_ifset(_AM_MANGLE_OPTION([$1]), [$2], [$3])])

# Copyright (C) 1999-2014 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# _AM_PROG_CC_C_O
# ---------------
# Like AC_PROG_CC_C_O, but changed for automake.  We rewrite AC_PROG_CC
# to automatically call this.
AC_DEFUN([_AM_PROG_CC_C_O],
[AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
AC_REQUIRE_AUX_FILE([compile])dnl
AC_LANG_PUSH([C])dnl
AC_CACHE_CHECK(
  [whether $CC understands -c and -o together],
  [am_cv_prog_cc_c_o],
  [AC_LANG_CONFTEST([AC_LANG_PROGRAM([])])
  # Make sure it works both with $CC and with simple cc.
  # Following AC_PROG_CC_C_O, we do the test twice because some
  # compilers refuse to overwrite an existing .o file with -o,
  # though they will create one.
  am_cv_prog_cc_c_o=yes
  for am_i in 1 2; do
    if AM_RUN_LOG([$CC -c conftest.$ac_ext -o conftest2.$ac_objext]) \
         && test -f conftest2.$ac_objext; then
      : OK
    else
      am_cv_prog_cc_c_o=no
      break
    fi
  done
  rm -f core conftest*
  unset am_i])
if test "$am_cv_prog_cc_c_o" != yes; then
   # Losing compiler, so override with the script.
   # FIXME: It is wrong to rewrite CC.
   # But if we don't then we get into trouble of one sort or another.
   # A longer-term fix would be to have automake use am__CC in this case,
   # and then we could set am__CC="\$(top_srcdir)/compile \$(CC)"
   CC="$am_aux_dir/compile $CC"
fi
AC_LANG_POP([C])])

# For backward compatibility.
AC_DEFUN_ONCE([AM_PROG_CC_C_O], [AC_REQUIRE([AC_PROG_CC])])

# Copyright (C) 2001-2014 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# AM_RUN_LOG(COMMAND)
# -------------------
# Run COMMAND, save the exit status in ac_status, and log it.
# (This has been adapted from Autoconf's _AC_RUN_LOG macro.)
AC_DEFUN([AM_RUN_LOG],
[{ echo "$as_me:$LINENO: $1" >&AS_MESSAGE_LOG_FD
   ($1) >&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD
   ac_status=$?
   echo "$as_me:$LINENO: \$? = $ac_status" >&AS_MESSAGE_LOG_FD
   (exit $ac_status); }])

# Check to make sure that the build environment is sane.    -*- Autoconf -*-

# Copyright (C) 1996-2014 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# AM_SANITY_CHECK
# ---------------
AC_DEFUN([AM_SANITY_CHECK],
[AC_MSG_CHECKING([whether build environment is sane])
# Reject unsafe characters in $srcdir or the absolute working directory
# name.  Accept space and tab only in the latter.
am_lf='
'
case `pwd` in
  *[[\\\"\#\$\&\'\`$am_lf]]*)
    AC_MSG_ERROR([unsafe absolute working directory name]);;
esac
case $srcdir in
  *[[\\\"\#\$\&\'\`$am_lf\ \	]]*)
    AC_MSG_ERROR([unsafe srcdir value: '$srcdir']);;
esac

# Do 'set' in a subshell so we don't clobber the current shell's
# arguments.  Must try -L first in case configure is actually a
# symlink; some systems play weird games with the mod time of symlinks
# (eg FreeBSD returns the mod time of the symlink's containing
# directory).
if (
   am_has_slept=no
   for am_try in 1 2; do
     echo "timestamp, slept: $am_has_slept" > conftest.file
     set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null`
     if test "$[*]" = "X"; then
	# -L didn't work.
	set X `ls -t "$srcdir/configure" conftest.file`
     fi
     if test "$[*]" != "X $srcdir/configure conftest.file" \
	&& test "$[*]" != "X conftest.file $srcdir/configure"; then

	# If neither matched, then we have a broken ls.  This can happen
	# if, for instance, CONFIG_SHELL is bash and it inherits a
	# broken ls alias from the environment.  This has actually
	# happened.  Such a system could not be considered "sane".
	AC_MSG_ERROR([ls -t appears to fail.  Make sure there is not a broken
  alias in your environment])
     fi
     if test "$[2]" = conftest.file || test $am_try -eq 2; then
       break
     fi
     # Just in case.
     sleep 1
     am_has_slept=yes
   done
   test "$[2]" = conftest.file
   )
then
   # Ok.
   :
else
   AC_MSG_ERROR([newly created file is older than distributed files!
Check your system clock])
fi
AC_MSG_RESULT([yes])
# If we didn't sleep, we still need to ensure time stamps of config.status and
# generated files are strictly newer.
am_sleep_pid=
if grep 'slept: no' conftest.file >/dev/null 2>&1; then
  ( sleep 1 ) &
  am_sleep_pid=$!
fi
AC_CONFIG_COMMANDS_PRE(
  [AC_MSG_CHECKING([that generated files are newer than configure])
   if test -n "$am_sleep_pid"; then
     # Hide warnings about reused PIDs.
     wait $am_sleep_pid 2>/dev/null
   fi
   AC_MSG_RESULT([done])])
rm -f conftest.file
])

# Copyright (C) 2009-2014 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# AM_SILENT_RULES([DEFAULT])
# --------------------------
# Enable less verbose build rules; with the default set to DEFAULT
# ("yes" being less verbose, "no" or empty being verbose).
AC_DEFUN([AM_SILENT_RULES],
[AC_ARG_ENABLE([silent-rules], [dnl
AS_HELP_STRING(
  [--enable-silent-rules],
  [less verbose build output (undo: "make V=1")])
AS_HELP_STRING(
  [--disable-silent-rules],
  [verbose build output (undo: "make V=0")])dnl
])
case $enable_silent_rules in @%:@ (((
  yes) AM_DEFAULT_VERBOSITY=0;;
   no) AM_DEFAULT_VERBOSITY=1;;
    *) AM_DEFAULT_VERBOSITY=m4_if([$1], [yes], [0], [1]);;
esac
dnl
dnl A few 'make' implementations (e.g., NonStop OS and NextStep)
dnl do not support nested variable expansions.
dnl See automake bug#9928 and bug#10237.
am_make=${MAKE-make}
AC_CACHE_CHECK([whether $am_make supports nested variables],
   [am_cv_make_support_nested_variables],
   [if AS_ECHO([['TRUE=$(BAR$(V))
BAR0=false
BAR1=true
V=1
am__doit:
	@$(TRUE)
.PHONY: am__doit']]) | $am_make -f - >/dev/null 2>&1; then
  am_cv_make_support_nested_variables=yes
else
  am_cv_make_support_nested_variables=no
fi])
if test $am_cv_make_support_nested_variables = yes; then
  dnl Using '$V' instead of '$(V)' breaks IRIX make.
  AM_V='$(V)'
  AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)'
else
  AM_V=$AM_DEFAULT_VERBOSITY
  AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY
fi
AC_SUBST([AM_V])dnl
AM_SUBST_NOTMAKE([AM_V])dnl
AC_SUBST([AM_DEFAULT_V])dnl
AM_SUBST_NOTMAKE([AM_DEFAULT_V])dnl
AC_SUBST([AM_DEFAULT_VERBOSITY])dnl
AM_BACKSLASH='\'
AC_SUBST([AM_BACKSLASH])dnl
_AM_SUBST_NOTMAKE([AM_BACKSLASH])dnl
])

# Copyright (C) 2001-2014 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# AM_PROG_INSTALL_STRIP
# ---------------------
# One issue with vendor 'install' (even GNU) is that you can't
# specify the program used to strip binaries.  This is especially
# annoying in cross-compiling environments, where the build's strip
# is unlikely to handle the host's binaries.
# Fortunately install-sh will honor a STRIPPROG variable, so we
# always use install-sh in "make install-strip", and initialize
# STRIPPROG with the value of the STRIP variable (set by the user).
AC_DEFUN([AM_PROG_INSTALL_STRIP],
[AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
# Installed binaries are usually stripped using 'strip' when the user
# run "make install-strip".  However 'strip' might not be the right
# tool to use in cross-compilation environments, therefore Automake
# will honor the 'STRIP' environment variable to overrule this program.
dnl Don't test for $cross_compiling = yes, because it might be 'maybe'.
if test "$cross_compiling" != no; then
  AC_CHECK_TOOL([STRIP], [strip], :)
fi
INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
AC_SUBST([INSTALL_STRIP_PROGRAM])])

# Copyright (C) 2006-2014 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# _AM_SUBST_NOTMAKE(VARIABLE)
# ---------------------------
# Prevent Automake from outputting VARIABLE = @VARIABLE@ in Makefile.in.
# This macro is traced by Automake.
AC_DEFUN([_AM_SUBST_NOTMAKE])

# AM_SUBST_NOTMAKE(VARIABLE)
# --------------------------
# Public sister of _AM_SUBST_NOTMAKE.
AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)])

# Check how to create a tarball.                            -*- Autoconf -*-

# Copyright (C) 2004-2014 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# _AM_PROG_TAR(FORMAT)
# --------------------
# Check how to create a tarball in format FORMAT.
# FORMAT should be one of 'v7', 'ustar', or 'pax'.
#
# Substitute a variable $(am__tar) that is a command
# writing to stdout a FORMAT-tarball containing the directory
# $tardir.
#     tardir=directory && $(am__tar) > result.tar
#
# Substitute a variable $(am__untar) that extract such
# a tarball read from stdin.
#     $(am__untar) < result.tar
#
AC_DEFUN([_AM_PROG_TAR],
[# Always define AMTAR for backward compatibility.  Yes, it's still used
# in the wild :-(  We should find a proper way to deprecate it ...
AC_SUBST([AMTAR], ['$${TAR-tar}'])

# We'll loop over all known methods to create a tar archive until one works.
_am_tools='gnutar m4_if([$1], [ustar], [plaintar]) pax cpio none'

m4_if([$1], [v7],
  [am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -'],

  [m4_case([$1],
    [ustar],
     [# The POSIX 1988 'ustar' format is defined with fixed-size fields.
      # There is notably a 21 bits limit for the UID and the GID.  In fact,
      # the 'pax' utility can hang on bigger UID/GID (see automake bug#8343
      # and bug#13588).
      am_max_uid=2097151 # 2^21 - 1
      am_max_gid=$am_max_uid
      # The $UID and $GID variables are not portable, so we need to resort
      # to the POSIX-mandated id(1) utility.  Errors in the 'id' calls
      # below are definitely unexpected, so allow the users to see them
      # (that is, avoid stderr redirection).
      am_uid=`id -u || echo unknown`
      am_gid=`id -g || echo unknown`
      AC_MSG_CHECKING([whether UID '$am_uid' is supported by ustar format])
      if test $am_uid -le $am_max_uid; then
         AC_MSG_RESULT([yes])
      else
         AC_MSG_RESULT([no])
         _am_tools=none
      fi
      AC_MSG_CHECKING([whether GID '$am_gid' is supported by ustar format])
      if test $am_gid -le $am_max_gid; then
         AC_MSG_RESULT([yes])
      else
        AC_MSG_RESULT([no])
        _am_tools=none
      fi],

  [pax],
    [],

  [m4_fatal([Unknown tar format])])

  AC_MSG_CHECKING([how to create a $1 tar archive])

  # Go ahead even if we have the value already cached.  We do so because we
  # need to set the values for the 'am__tar' and 'am__untar' variables.
  _am_tools=${am_cv_prog_tar_$1-$_am_tools}

  for _am_tool in $_am_tools; do
    case $_am_tool in
    gnutar)
      for _am_tar in tar gnutar gtar; do
        AM_RUN_LOG([$_am_tar --version]) && break
      done
      am__tar="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$$tardir"'
      am__tar_="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$tardir"'
      am__untar="$_am_tar -xf -"
      ;;
    plaintar)
      # Must skip GNU tar: if it does not support --format= it doesn't create
      # ustar tarball either.
      (tar --version) >/dev/null 2>&1 && continue
      am__tar='tar chf - "$$tardir"'
      am__tar_='tar chf - "$tardir"'
      am__untar='tar xf -'
      ;;
    pax)
      am__tar='pax -L -x $1 -w "$$tardir"'
      am__tar_='pax -L -x $1 -w "$tardir"'
      am__untar='pax -r'
      ;;
    cpio)
      am__tar='find "$$tardir" -print | cpio -o -H $1 -L'
      am__tar_='find "$tardir" -print | cpio -o -H $1 -L'
      am__untar='cpio -i -H $1 -d'
      ;;
    none)
      am__tar=false
      am__tar_=false
      am__untar=false
      ;;
    esac

    # If the value was cached, stop now.  We just wanted to have am__tar
    # and am__untar set.
    test -n "${am_cv_prog_tar_$1}" && break

    # tar/untar a dummy directory, and stop if the command works.
    rm -rf conftest.dir
    mkdir conftest.dir
    echo GrepMe > conftest.dir/file
    AM_RUN_LOG([tardir=conftest.dir && eval $am__tar_ >conftest.tar])
    rm -rf conftest.dir
    if test -s conftest.tar; then
      AM_RUN_LOG([$am__untar <conftest.tar])
      AM_RUN_LOG([cat conftest.dir/file])
      grep GrepMe conftest.dir/file >/dev/null 2>&1 && break
    fi
  done
  rm -rf conftest.dir

  AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool])
  AC_MSG_RESULT([$am_cv_prog_tar_$1])])

AC_SUBST([am__tar])
AC_SUBST([am__untar])
]) # _AM_PROG_TAR