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	# configure.ac - for libassuan
	# Copyright (C) 2001, 2002, 2003, 2006, 2007, 2009,
	# 2011, 2012, 2013 Free Software Foundation, Inc.
	# Copyright (C) 2013, 2014 g10 Code GmbH
	#
	# This file is part of Assuan.
	#
	# Assuan is free software; you can redistribute it and/or modify it
	# under the terms of the GNU Lesser General Public License as
	# published by the Free Software Foundation; either version 2.1 of
	# the License, or (at your option) any later version.
	#
	# Assuan 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
	# Lesser General Public License for more details.
	#
	# You should have received a copy of the GNU Lesser General Public
	# License along with this program; if not, see <http://www.gnu.org/licenses/>.

	# Process this file with autoconf to produce a configure script.

	AC_PREREQ(2.61)
	min_automake_version="1.10"

	# To build a release you need to create a tag with the version number
	# (git tag -s libassuan-n.m.k) and run "./autogen.sh --force". Please
	# bump the version number immediately after the release and do another
	# commit and push so that the git magic is able to work. See below
	# for the LT versions.
	m4_define([mym4_package],[libassuan])
	m4_define([mym4_major], [2])
	m4_define([mym4_minor], [1])
	m4_define([mym4_micro], [3])

	# To start a new development series, i.e a new major or minor number
	# you need to mark an arbitrary commit before the first beta release
	# with an annotated tag. For example a 2.1 branch starts off with
	# the tag "foo-2.1-base". This is used as the base for counting
	# beta numbers before the first release of a series.

	# Below is m4 magic to extract and compute the git revision number,
	# the decimalized short revision number, a beta version string and a
	# flag indicating a development version (mym4_isbeta). Note that the
	# m4 processing is done by autoconf and not during the configure run.
	m4_define([mym4_verslist], m4_split(m4_esyscmd([./autogen.sh --find-version] \
	mym4_package mym4_major mym4_minor mym4_micro),[:]))
	m4_define([mym4_isbeta], m4_argn(2, mym4_verslist))
	m4_define([mym4_version], m4_argn(4, mym4_verslist))
	m4_define([mym4_revision], m4_argn(7, mym4_verslist))
	m4_define([mym4_revision_dec], m4_argn(8, mym4_verslist))

	AC_INIT([mym4_package],[mym4_version], [http://bugs.gnupg.org])

	# LT Version numbers, remember to change them just before a release.
	# (Code changed: REVISION++)
	# (Interfaces added/removed/changed: CURRENT++, REVISION=0)
	# (Interfaces added: AGE++)
	# (Interfaces removed/changed: AGE=0)
	#
	LIBASSUAN_LT_CURRENT=4
	LIBASSUAN_LT_AGE=4
	LIBASSUAN_LT_REVISION=3

	# If the API is changed in an incompatible way: increment the next counter.
	LIBASSUAN_CONFIG_API_VERSION=2
	##############################################

	AC_SUBST(LIBASSUAN_LT_CURRENT)
	AC_SUBST(LIBASSUAN_LT_AGE)
	AC_SUBST(LIBASSUAN_LT_REVISION)

	PACKAGE=$PACKAGE_NAME
	VERSION=$PACKAGE_VERSION

	AC_CONFIG_AUX_DIR([build-aux])
	AM_INIT_AUTOMAKE
	AM_MAINTAINER_MODE
	AC_CONFIG_SRCDIR(src/assuan.h.in)
	AC_CONFIG_MACRO_DIR(m4)
	AM_CONFIG_HEADER(config.h)
	AC_CANONICAL_HOST
	AM_SILENT_RULES
	AB_INIT

	AC_GNU_SOURCE


	AC_SUBST(PACKAGE)
	AC_SUBST(VERSION)
	AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE", [Name of this package])
	AC_DEFINE_UNQUOTED(VERSION, "$VERSION", [Version of this package])
	AC_DEFINE_UNQUOTED(PACKAGE_BUGREPORT, "$PACKAGE_BUGREPORT",[Bug report address])
	VERSION_NUMBER=m4_esyscmd(printf "0x%02x%02x%02x" mym4_major \
	mym4_minor mym4_micro)
	AC_SUBST(VERSION_NUMBER)


	# Don't default to build static libs.
	LT_PREREQ([2.2.6])
	LT_INIT([win32-dll disable-static])
	LT_LANG([Windows Resource])

	# For now we hardcode the use of version scripts. It would be better
	# to write a test for this or even implement this within libtool.
	have_ld_version_script=no
	case "${host}" in
	--linux*)
	have_ld_version_script=yes
	;;
	--gnu*)
	have_ld_version_script=yes
	;;
	-apple-darwin)
	AC_DEFINE(_XOPEN_SOURCE, 500, Activate POSIX interface on MacOS X)
	AC_DEFINE(_DARWIN_C_SOURCE, 1, Activate CMSG_LEN/CMSG_SPACE on MacOS X)
	;;
	esac

	AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$have_ld_version_script" = "yes")

	AH_TOP([
	#ifndef _ASSUAN_CONFIG_H_INCLUDED
	#define _ASSUAN_CONFIG_H_INCLUDED

	/* Enable gpg-error's strerror macro under W32CE. */
	#define GPG_ERR_ENABLE_ERRNO_MACROS 1
	])

	AH_BOTTOM([

	#endif /_ASSUAN_CONFIG_H_INCLUDED/
	])


	# Checks for programs.
	missing_dir=`cd $ac_aux_dir && pwd`
	AM_MISSING_PROG(ACLOCAL, aclocal, $missing_dir)
	AM_MISSING_PROG(AUTOCONF, autoconf, $missing_dir)
	AM_MISSING_PROG(AUTOMAKE, automake, $missing_dir)
	AM_MISSING_PROG(AUTOHEADER, autoheader, $missing_dir)
	AM_MISSING_PROG(MAKEINFO, makeinfo, $missing_dir)
	AC_PROG_AWK
	AC_PROG_CC
	AC_PROG_CPP
	AM_PROG_CC_C_O
	if test "x$ac_cv_prog_cc_c89" = "xno" ; then
	AC_MSG_ERROR([[No C-89 compiler found]])
	fi
	AC_PROG_INSTALL
	AC_PROG_LN_S
	AC_PROG_MAKE_SET
	#AC_ARG_PROGRAM

	# We need to compile and run a program on the build machine. A
	# comment in libgpg-error says that the AC_PROG_CC_FOR_BUILD macro in
	# the AC archive is broken for autoconf 2.57. Given that there is no
	# newer version of that macro, we assume that it is also broken for
	# autoconf 2.61 and thus we use a simple but usually sufficient
	# approach.
	AC_MSG_CHECKING(for cc for build)
	if test "$cross_compiling" = "yes"; then
	CC_FOR_BUILD="${CC_FOR_BUILD-cc}"
	else
	CC_FOR_BUILD="${CC_FOR_BUILD-$CC}"
	fi
	AC_MSG_RESULT($CC_FOR_BUILD)
	AC_ARG_VAR(CC_FOR_BUILD,[build system C compiler])


	if test "$GCC" = yes; then
	CFLAGS="$CFLAGS -Wall -Wcast-align -Wshadow -Wstrict-prototypes"

	AC_MSG_CHECKING([if gcc supports -Wpointer-arith])
	_gcc_cflags_save=$CFLAGS
	CFLAGS="-Wpointer-arith"
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],_gcc_wopt=yes,_gcc_wopt=no)
	AC_MSG_RESULT($_gcc_wopt)
	CFLAGS=$_gcc_cflags_save;
	if test x"$_gcc_wopt" = xyes ; then
	CFLAGS="$CFLAGS -Wpointer-arith"
	fi
	fi


	#
	# Options depending on the host OS.
	#
	have_dosish_system=no
	have_w32_system=no
	have_w64_system=no
	have_w32ce_system=no
	case "${host}" in
	-linux)
	if test "$GCC" = yes; then
	CFLAGS="$CFLAGS -fPIC -DPIC"
	fi
	;;
	x86_64-mingw32)
	have_dosish_system=yes
	have_w32_system=yes
	have_w64_system=yes
	;;
	-mingw32ce)
	have_dosish_system=yes
	have_w32_system=yes
	have_w32ce_system=yes
	;;
	-mingw32)
	have_dosish_system=yes
	have_w32_system=yes
	;;
	-solaris)
	AC_DEFINE(_XOPEN_SOURCE, 500, Activate extensions on Solaris)
	AC_DEFINE(_XOPEN_SOURCE_EXTENDED, 1, Activate extensions on Solaris)
	AC_DEFINE(__EXTENSIONS__, 1, Activate extensions on Solaris)
	;;
	esac

	if test "$have_dosish_system" = yes; then
	AC_DEFINE(HAVE_DOSISH_SYSTEM,1,
	[Defined if we run on some of the PCDOS like systems
	(DOS, Windoze. OS/2) with special properties like
	no file modes])
	fi

	if test "$have_w32_system" = yes; then
	AC_DEFINE(HAVE_W32_SYSTEM,1,[Defined if we run on a W32 API based system])
	if test "$have_w64_system" = yes; then
	AC_DEFINE(HAVE_W64_SYSTEM,1,
	[Defined if we run on a 64 bit W32 API based system])
	fi
	if test "$have_w32ce_system" = yes; then
	AC_DEFINE(HAVE_W32CE_SYSTEM,1,[Defined if we run on WindowsCE])
	fi
	fi
	AM_CONDITIONAL(HAVE_W32_SYSTEM, test "$have_w32_system" = yes)
	AM_CONDITIONAL(HAVE_W32CE_SYSTEM, test "$have_w32ce_system" = yes)
	AM_CONDITIONAL(HAVE_W64_SYSTEM, test "$have_w64_system" = yes)


	#
	# Provide information about the build.
	#
	BUILD_REVISION="mym4_revision"
	AC_SUBST(BUILD_REVISION)
	AC_DEFINE_UNQUOTED(BUILD_REVISION, "$BUILD_REVISION",
	[GIT commit id revision used to build this package])

	changequote(,)dnl
	BUILD_FILEVERSION=`echo "$VERSION" \| sed 's/$[0-9.]$./\1./;s/\./,/g'`
	changequote([,])dnl
	BUILD_FILEVERSION="${BUILD_FILEVERSION}mym4_revision_dec"
	AC_SUBST(BUILD_FILEVERSION)

	BUILD_TIMESTAMP=`date -u +%Y-%m-%dT%H:%M+0000 2>/dev/null \|\| date`
	AC_SUBST(BUILD_TIMESTAMP)
	AC_DEFINE_UNQUOTED(BUILD_TIMESTAMP, "$BUILD_TIMESTAMP",
	[The time this package was configured for a build])



	#
	# Check for network libraries. They are needed for tests.
	#
	AC_CHECK_FUNC(setsockopt, , AC_CHECK_LIB(socket, setsockopt,
	[NETLIBS="-lsocket $NETLIBS"]))
	AC_SUBST(NETLIBS)

	if test "$have_w32_system" = yes; then
	if test "$have_w32ce_system" = yes; then
	NETLIBS="-lws2 $NETLIBS"
	else
	# FIXME: Check why we need to use ws2_32 and document that.
	NETLIBS="-lws2_32 $NETLIBS"
	fi
	fi

	#
	# Provide info for src/libassuan-config.in
	#
	LIBASSUAN_CONFIG_LIB="-lassuan"
	LIBASSUAN_CONFIG_CFLAGS=""
	LIBASSUAN_CONFIG_HOST="$host"
	LIBASSUAN_CONFIG_EXTRA_LIBS=
	if test x"$NETLIBS" != x; then
	LIBASSUAN_CONFIG_EXTRA_LIBS="$LIBASSUAN_CONFIG_EXTRA_LIBS $NETLIBS"
	fi
	AC_SUBST(LIBASSUAN_CONFIG_LIB)
	AC_SUBST(LIBASSUAN_CONFIG_CFLAGS)
	AC_SUBST(LIBASSUAN_CONFIG_HOST)
	AC_SUBST(LIBASSUAN_CONFIG_API_VERSION)
	AC_SUBST(LIBASSUAN_CONFIG_EXTRA_LIBS)

	#
	# Checks for header files.
	#
	AC_HEADER_STDC
	AC_CHECK_HEADERS([string.h locale.h sys/uio.h stdint.h inttypes.h \
	sys/types.h sys/stat.h unistd.h sys/time.h fcntl.h \
	sys/select.h ])
	AC_TYPE_UINTPTR_T
	AC_TYPE_UINT16_T

	#
	# Checks for typedefs, structures, and compiler characteristics.
	#
	AC_C_CONST
	AC_C_INLINE
	AC_TYPE_SIZE_T
	AC_TYPE_SIGNAL
	AC_DECL_SYS_SIGLIST

	gl_HEADER_SYS_SOCKET
	gl_TYPE_SOCKLEN_T

	AC_CHECK_MEMBER(struct cmsghdr.cmsg_len,
	[use_descriptor_passing=yes],
	[use_descriptor_passing=no
	AC_MSG_WARN([
	***
	*** Data structure for sending ancillary data missing.
	*** Descriptor passing won't work.
	***])],[
	#include <stdlib.h>
	#include <stddef.h>
	#include <stdio.h>
	#include <sys/types.h>
	#include <sys/socket.h>
	#include <sys/un.h>
	#if HAVE_SYS_UIO_H
	#include <sys/uio.h>
	#endif
	#include <unistd.h>
	])
	if test "$use_descriptor_passing" = "yes"; then
	AC_DEFINE(USE_DESCRIPTOR_PASSING, 1,
	[Defined if descriptor passing is supported])
	fi
	AM_CONDITIONAL(USE_DESCRIPTOR_PASSING, test "$use_descriptor_passing" = "yes")


	# Checking for libgpg-error.
	AM_PATH_GPG_ERROR(1.8,, AC_MSG_ERROR([libgpg-error was not found]))

	#
	# Checks for library functions.
	#
	AC_CHECK_FUNCS([flockfile funlockfile inet_pton])

	# On some systems (e.g. Solaris) nanosleep requires linking to librl.
	# Given that we use nanosleep only as an optimization over a select
	# based wait function we want it only if it is available in libc.
	_save_libs="$LIBS"
	AC_SEARCH_LIBS([nanosleep], [],
	[AC_DEFINE(HAVE_NANOSLEEP,1,
	[Define to 1 if you have the `nanosleep' function in libc.])])
	LIBS="$_save_libs"


	# Check for funopen
	AC_CHECK_FUNCS(funopen)
	if test $ac_cv_func_funopen != yes; then
	# No funopen but we can implement that in terms of fopencookie.
	AC_CHECK_FUNCS(fopencookie)
	if test $ac_cv_func_fopencookie = yes; then
	AC_LIBOBJ([funopen])
	else
	AC_MSG_WARN([
	***
	*** No implementation of fopencookie or funopen available.
	*** The assuan_get_data_fp function won't work; see the
	*** manual for details. GnuPG does not require this feature.
	***])
	fi
	fi


	AC_REPLACE_FUNCS(isascii)
	AC_REPLACE_FUNCS(putc_unlocked)
	AC_REPLACE_FUNCS(memrchr)
	AC_REPLACE_FUNCS(stpcpy)
	AC_CHECK_HEADERS(unistd.h)
	AC_REPLACE_FUNCS(setenv)
	AC_REPLACE_FUNCS(vasprintf)


	#
	# Check for the getsockopt SO_PEERCRED
	#
	AC_MSG_CHECKING(for SO_PEERCRED)
	AC_CACHE_VAL(assuan_cv_sys_so_peercred,
	[AC_TRY_COMPILE([#include <sys/socket.h>],
	[struct ucred cr;
	int cl = sizeof cr;
	getsockopt (1, SOL_SOCKET, SO_PEERCRED, &cr, &cl);],
	assuan_cv_sys_so_peercred=yes,
	assuan_cv_sys_so_peercred=no)
	])
	AC_MSG_RESULT($assuan_cv_sys_so_peercred)

	if test $assuan_cv_sys_so_peercred = yes; then
	AC_DEFINE(HAVE_SO_PEERCRED, 1,
	[Defined if SO_PEERCRED is supported (Linux specific)])
	else
	# Check for the getsockopt LOCAL_PEEREID (NetBSD)
	AC_MSG_CHECKING(for LOCAL_PEEREID)
	AC_CACHE_VAL(assuan_cv_sys_so_local_peereid,
	[AC_TRY_COMPILE([#include <sys/socket.>
	#include <sys/un.h>],
	[struct unpcbid unp;
	int unpl = sizeof unp;
	getsockopt (1, SOL_SOCKET, LOCAL_PEEREID, &unp, &unpl);],
	assuan_cv_sys_so_local_peereid=yes,
	assuan_cv_sys_so_local_peereid=no)
	])
	AC_MSG_RESULT($assuan_cv_sys_so_local_peereid)

	if test $assuan_cv_sys_so_local_peereid = yes; then
	AC_DEFINE(HAVE_LOCAL_PEEREID, 1,
	[Defined if LOCAL_PEEREID is supported (NetBSD specific)])
	else
	# (Open)Solaris
	AC_CHECK_FUNCS([getpeerucred], AC_CHECK_HEADERS([ucred.h]))
	if test $ac_cv_func_getpeerucred != yes; then
	# FreeBSD
	AC_CHECK_FUNCS([getpeereid])
	fi
	fi
	fi

	#
	# Create the config files.
	#
	AC_CONFIG_FILES([Makefile])
	AC_CONFIG_FILES([m4/Makefile])
	AC_CONFIG_FILES([src/Makefile])
	AC_CONFIG_FILES([doc/Makefile])
	AC_CONFIG_FILES([tests/Makefile])
	AC_CONFIG_FILES([src/libassuan-config], [chmod +x src/libassuan-config])
	AC_CONFIG_FILES([src/versioninfo.rc])

	AC_OUTPUT

	echo "
	Libassuan v${VERSION} has been configured as follows:

	Revision: mym4_revision (mym4_revision_dec)
	Platform: $host
	"

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