dnl $Id: configure.in,v 1.1.1.1 2003-06-04 00:25:25 marka Exp $
dnl Process this file with autoconf to produce a configure script.
dnl
dnl Copyright (c) 2000 Japan Network Information Center.  All rights reserved.
dnl  
dnl By using this file, you agree to the terms and conditions set forth bellow.
dnl 
dnl 			LICENSE TERMS AND CONDITIONS 
dnl 
dnl The following License Terms and Conditions apply, unless a different
dnl license is obtained from Japan Network Information Center ("JPNIC"),
dnl a Japanese association, Kokusai-Kougyou-Kanda Bldg 6F, 2-3-4 Uchi-Kanda,
dnl Chiyoda-ku, Tokyo 101-0047, Japan.
dnl 
dnl 1. Use, Modification and Redistribution (including distribution of any
dnl    modified or derived work) in source and/or binary forms is permitted
dnl    under this License Terms and Conditions.
dnl 
dnl 2. Redistribution of source code must retain the copyright notices as they
dnl    appear in each source code file, this License Terms and Conditions.
dnl 
dnl 3. Redistribution in binary form must reproduce the Copyright Notice,
dnl    this License Terms and Conditions, in the documentation and/or other
dnl    materials provided with the distribution.  For the purposes of binary
dnl    distribution the "Copyright Notice" refers to the following language:
dnl    "Copyright (c) 2000-2002 Japan Network Information Center.  All rights reserved."
dnl 
dnl 4. The name of JPNIC may not be used to endorse or promote products
dnl    derived from this Software without specific prior written approval of
dnl    JPNIC.
dnl 
dnl 5. Disclaimer/Limitation of Liability: THIS SOFTWARE IS PROVIDED BY JPNIC
dnl    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
dnl    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
dnl    PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL JPNIC BE LIABLE
dnl    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
dnl    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
dnl    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
dnl    BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
dnl    WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
dnl    OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
dnl    ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

AC_INIT(include/idn/converter.h)

AC_CANONICAL_HOST

debug=no
AC_ARG_ENABLE(debug,
[  --enable-debug          enable debug codes [default=no]],
	debug=$enableval)
case "$debug" in
yes)
    CFLAGS="$CFLAGS -DDEBUG"
    ;;
esac

mdnkit_compat=no
COMPAT_TRUE="#"
COMPAT_FALSE=
AC_ARG_ENABLE(mdnkit-compat,
[  --enable-mdnkit-compat  enable mDNkit compatibility mode [default=no]],
	mdnkit_compat=$enableval)
case "$mdnkit_compat" in
yes)
    COMPAT_TRUE=
    COMPAT_FALSE="#"
    AC_DEFINE(ENABLE_MDNKIT_COMPAT, 1,
	[Define if --enable-mdnkit-compat is specified])
    ;;
no)
    ;;
*)
    AC_MSG_ERROR([You must specify yes or no to --enable-runidn option.])
    ;;
esac
AC_SUBST(COMPAT_TRUE)
AC_SUBST(COMPAT_FALSE)

extraace=no
AC_ARG_ENABLE(extra-ace,
[  --enable-extra-ace      enable additional ACE converters. [default=no]],
	extraace=$enableval)
case "$extraace" in
no)
    ;;
yes)
    AC_DEFINE(IDN_EXTRA_ACE, 1,
	[Define if you want additional ACE converters compiled in.])
    ;;
*)
    AC_MSG_ERROR([You must specify yes or no to --enable-extra-ace option.])
    ;;
esac

UTF8_NAME=no
AC_ARG_WITH(utf8,
[  --with-utf8=NAME        codeset name for UTF-8 encoding [UTF-8]],
	UTF8_NAME=$withval)
case "$UTF8_NAME" in
no)
    UTF8_NAME=UTF-8
    ;;
yes)
    AC_MSG_ERROR([You must specify NAME to --with-utf8 option.])
    ;;
*)
    AC_DEFINE_UNQUOTED(IDN_UTF8_ENCODING_NAME, "$UTF8_NAME",
	[Define if your iconv() does not accept "UTF-8" as the codeset name for utf-8.])
    ;;
esac
AC_SUBST(UTF8_NAME)

liteonly=no
LITEONLY_TRUE="#"
LITEONLY_FALSE=
AC_ARG_ENABLE(liteonly,
[  --enable-liteonly       compile and install lite library only [default=no]],
	liteonly=$enableval)
case "$liteonly" in
no)
    ;;
yes)
    if test "$install_runidn" = yes ; then
	AC_MSG_ERROR([you can't set value \"yes\" to --enable-runidn and --enable-liteonly simultaneously, because runidn requires iconv support of generic libidnkit.])
    fi
    LITEONLY_TRUE=
    LITEONLY_FALSE="#"
    ;;
*)
    AC_MSG_ERROR([You must specify yes or no to --enable-liteonly option.])
    ;;
esac
AC_SUBST(LITEONLY_TRUE)
AC_SUBST(LITEONLY_FALSE)

install_runidn=no
RUNIDN_TRUE="#"
RUNIDN_FALSE=
AC_ARG_ENABLE(runidn,
[  --enable-runidn         compile and install runidn [default=no]],
	install_runidn=$enableval)
case "$install_runidn" in
no)
    ;;
yes)
    if test "$liteonly" = yes ; then
	AC_MSG_ERROR([you can't set value \"yes\" to --enable-runidn and --enable-liteonly simultaneously, because runidn requires iconv support of generic libidnkit.])
    fi
    RUNIDN_TRUE=
    RUNIDN_FALSE="#"
    ;;
*)
    AC_MSG_ERROR([You must specify yes or no to --enable-runidn option.])
    ;;
esac
AC_SUBST(RUNIDN_TRUE)
AC_SUBST(RUNIDN_FALSE)

ICONVINC=
ICONVLIB=

libiconv=unspec
AC_ARG_WITH(libiconv,
[  --with-libiconv=IPREFIX  GNU libiconv are installed in IPREFIX [PREFIX]],
	libiconv=$withval)
case "$libiconv" in
unspec)
    ;;
no)
    ICONVINC=
    ICONVLIB=
    ;;
yes)
    if test "$liteonly" = yes ; then
	AC_MSG_ERROR([you can't set iconv options at all when you set value \"yes\" to --enable-liteonly, because lite library does not have iconv support.])
    fi
    if test X$prefix = XNONE ; then
	libiconv=$ac_default_prefix
    else
	libiconv=$prefix
    fi
    ICONVINC="-I$libiconv/include"
    ICONVLIB="-L$libiconv/lib -R$libiconv/lib -liconv"
    ;;
*)
    if test "$liteonly" = yes ; then
	AC_MSG_ERROR([you can't set iconv options at all when you set value \"yes\" to --enable-liteonly, because lite library does not have iconv support.])
    fi
    ICONVINC="-I$libiconv/include"
    ICONVLIB="-L$libiconv/lib -R$libiconv/lib -liconv"
    ;;
esac

iconv_include=unspec
AC_ARG_WITH(iconv-include,
[  --with-iconv-include=DIR  iconv include files are in DIR []],
	iconv_include=$withval)
case "$iconv_include" in
unspec)
    ;;
no)
    ICONVINC=
    ;;
yes)
    if test "$liteonly" = yes ; then
	AC_MSG_ERROR([you can't set iconv options at all when you set value \"yes\" to --enable-liteonly, because lite library does not have iconv support.])
    fi
    AC_MSG_WARN([You must supply DIR to --with-iconv-include option.
  Ignored.])
    ICONVINC=
    ;;
*)
    if test "$liteonly" = yes ; then
	AC_MSG_ERROR([you can't set iconv options at all when you set value \"yes\" to --enable-liteonly, because lite library does not have iconv support.])
    fi
    ICONVINC="-I$iconv_include"
    ;;
esac

if test "X$ICONVINC" != X ; then
    iconv_include="`echo X$ICONVINC | sed -e 's/^X-I//'`"
    if test ! -f "$iconv_include/iconv.h" ; then
	AC_MSG_ERROR([iconv.h doesn't exist in $iconv_include])
    fi
fi

AC_SUBST(ICONVINC)

iconv=unspec
AC_ARG_WITH(iconv,
[  --with-iconv=LIB        special library for iconv []],
	iconv=$withval)
case "$iconv" in
unspec)
    ;;
no)
    ICONVLIB=
    ;;
yes)
    if test "$liteonly" = yes ; then
	AC_MSG_ERROR([you can't set iconv options at all when you set value \"yes\" to --enable-liteonly, because lite library does not have iconv support.])
    fi
    AC_MSG_WARN([You must supply LIB to --with-iconv option.
  -liconv is assumed.])
    ICONVLIB=-liconv
    ;;
*)
    if test "$liteonly" = yes ; then
	AC_MSG_ERROR([you can't set iconv options at all when you set value \"yes\" to --enable-liteonly, because lite library does not have iconv support.])
    fi
    ICONVLIB=$iconv
    ;;
esac
AC_SUBST(ICONVLIB)

AC_ARG_WITH(iconv-sofile,
[  --with-iconv-sofile=PATH  shared library file for libiconv []],
	iconv_file=$withval, iconv_file=guess)
ICONVSOFILE=
case "$iconv_file" in
no)
    ICONVSOFILE=none
    ;;
yes)
    if test "$liteonly" = yes ; then
	AC_MSG_ERROR([you can't set iconv options at all when you set value \"yes\" to --enable-liteonly, because lite library does not have iconv support.])
    fi
    AC_MSG_ERROR([You must supply PATH to --with-iconv-sofile option.])
    ;;
guess)
    if test "$liteonly" != yes ; then
	if test "$ICONVLIB" = ""; then
	    ICONVSOFILE=none
	else
	    AC_MSG_CHECKING(pathname of iconv shared library)
	    ic_libdir=
	    ic_libname=
	    case "$host" in
	    *-hpux*)
		SO=sl
		;;
	    *)
		SO=so
		;;
	    esac
	    for arg in $ICONVLIB; do
		case "$arg" in
		-L*) ic_libdir="$ic_libdir `echo $arg | sed s/-L//`" ;;
		-l*) ic_libname=`echo $arg | sed s/-l//` ;;
		/*.$SO*) ICONVSOFILE=$arg ;;
		esac
	    done
	    if test "$ICONVSOFILE" = ""; then
		if test "$ic_libname" = ""; then
		    AC_MSG_RESULT(unknown)
		    AC_MSG_WARN([use --with-iconv-sofile for specifying iconv shared library file])
		    ICONVSOFILE=none
		else
		    if test "$ic_libdir" = ""; then
			# Standard (and semi-standard) library directories
			ic_libdir="/lib /usr/lib /usr/local/lib"
		    fi
		    for dir in $ic_libdir; do
			ICONVSOFILE=`ls -r $dir/lib$ic_libname.$SO* 2>/dev/null | head -1`
			if test "$ICONVSOFILE" != ""; then
			    break
			fi
		    done
		    if test "$ICONVSOFILE" != ""; then
			AC_MSG_RESULT($ICONVSOFILE)
		    else
			AC_MSG_RESULT(unknown)
			AC_MSG_WARN([use --with-iconv-sofile for specifying iconv shared library file])
			ICONVSOFILE=none
		    fi
		fi
	    fi
	fi
    else
	ICONVSOFILE=none
    fi
    ;;
*)
    if test "$liteonly" = yes ; then
	AC_MSG_ERROR([you can't set iconv options at all when you set value \"yes\" to --enable-liteonly, because lite library does not have iconv support.])
    fi
    ICONVSOFILE=$iconv_file
    ;;
esac
AC_SUBST(ICONVSOFILE)

dnl Figure out preload stuff.
PRELOAD_VAR="LD_PRELOAD"
PRELOAD_SEP=":"
PRELOAD_LAST=""
case "$host" in
*-solaris*)
    PRELOAD_SEP=" "
    ;;
*-linux*)
    PRELOAD_SEP=" "
    ;;
*-osf*)
    PRELOAD_VAR="_RLD_LIST"
    PRELOAD_LAST=":DEFAULT"
    ;;
*-netbsd*)
    if test -x /usr/bin/file -a -x /usr/bin/grep ; then
        case "`/usr/bin/file /usr/bin/grep`" in
	*ELF*)
	    PRELOAD_SEP=" "
	    ;;
	esac
    fi
    ;;
esac

AC_SUBST(PRELOAD_VAR)
AC_SUBST(PRELOAD_SEP)
AC_SUBST(PRELOAD_LAST)

dnl Checks for standard tools.
AC_PROG_CC
AC_PROG_INSTALL
AM_PROG_LIBTOOL

AC_PATH_PROGS(PERL, perl, perl)

dnl Checks for header files.
AC_CHECK_HEADERS(unistd.h locale.h langinfo.h pwd.h)
if test "$install_runidn" = yes ; then
    AC_CHECK_HEADERS(dlfcn.h)
fi

saved_CPPFLAGS=$CPPFLAGS
CPPFLAGS="$CPPFLAGS $ICONVINC"
if test "$liteonly" != yes ; then
    AC_CHECK_HEADER(iconv.h, , [AC_MSG_ERROR([iconv.h doesn't exist])])
fi
CPPFLAGS=$saved_CPPFLAGS

dnl Checks for data types.
AC_TYPE_UID_T
dnl for dnsproxy.
AC_CHECK_TYPE(BOOL, int)

dnl Checks for libraries.
if test "$install_runidn" = yes ; then
    AC_CHECK_LIB(socket, socket)
    AC_CHECK_LIB(nsl, inet_addr)
    AC_CHECK_LIB(dl, dlopen, [
	LIBS="-ldl $LIBS"
	LIBDL="-ldl"
	AC_DEFINE(HAVE_LIBDL, 1, [Define if you have the dl library (-ldl).])
	AC_SUBST(LIBDL)
    ])
fi

dnl Checks for library functions.
AC_CHECK_FUNCS(vsnprintf setvbuf setlocale nl_langinfo memmove bcopy setenv \
    unsetenv)
if test "$install_runidn" = yes ; then
    AC_CHECK_FUNCS(gethostbyname gethostbyname2 gethostbyaddr)
    AC_CHECK_FUNCS(gethostbyname_r gethostbyname2_r gethostbyaddr_r, find_gethost_r=yes)
    AC_CHECK_FUNCS(getipnodebyname getipnodebyaddr freehostent)
    AC_CHECK_FUNCS(getaddrinfo freeaddrinfo getnameinfo)
    AC_CHECK_FUNCS(dlopen dlsym)
fi

if test "$install_runidn" = yes ; then
dnl Checks the flavor of gethostbyaddr* functions.
    AC_CACHE_CHECK(flavor of gethostbyaddr, ac_cv_flavor_gethostbyaddr,
    [ac_cv_flavor_gethostbyaddr=unknown
    AC_TRY_RUN(
    [
    #include <stddef.h>
    #include <sys/types.h>
    #include <sys/socket.h>
    #include <netdb.h>
    struct hostent *gethostbyaddr(const void *addr, socklen_t len, int type) {
	return NULL;
    }
    int main() {
	(void)gethostbyaddr(NULL, 0, 0);
	return 0;
    }
    ], ac_cv_flavor_gethostbyaddr=glibc2_2,,
       ac_cv_flavor_gethostbyaddr=unknown)
    AC_TRY_RUN(
    [
    #include <stddef.h>
    #include <sys/types.h>
    #include <sys/socket.h>
    #include <netdb.h>
    struct hostent *gethostbyaddr(const char *addr, size_t len, int type) {
	return NULL;
    }
    int main() {
	(void)gethostbyaddr(NULL, 0, 0);
	return 0;
    }
    ], ac_cv_flavor_gethostbyaddr=glibc,,
       ac_cv_flavor_gethostbyaddr=unknown)
    AC_TRY_RUN(
    [
    #include <stddef.h>
    #include <sys/types.h>
    #include <sys/socket.h>
    #include <netdb.h>
    struct hostent *gethostbyaddr(const char *addr, int len, int type) {
	return NULL;
    }
    int main() {
	(void)gethostbyaddr(NULL, 0, 0);
	return 0;
    }
    ], ac_cv_flavor_gethostbyaddr=traditional,,
       ac_cv_flavor_gethostbyaddr=unknown)
    if test "$ac_cv_func_gethostbyaddr" = no ; then
	ac_cv_flavor_gethostbyaddr=none
    fi])

    case "$ac_cv_flavor_gethostbyaddr" in
    glibc2_2)
	ac_cv_type_ghba_addr_t='const void *'
	ac_cv_type_ghba_addrlen_t='socklen_t'
	;;
    glibc)
	ac_cv_type_ghba_addr_t='const char *'
	ac_cv_type_ghba_addrlen_t='size_t'
	;;
    traditional | none)
	ac_cv_type_ghba_addr_t='const char *'
	ac_cv_type_ghba_addrlen_t='int'
	;;
    *)
	AC_MSG_ERROR([can't build runidn, since parameter type list of gethostbyaddr() is unknown to configure.])
	;;
    esac
    AC_DEFINE_UNQUOTED(GHBA_ADDR_T, $ac_cv_type_ghba_addr_t,
	[Define as the type of the 1st argument of gethostbyaddr.])
    AC_DEFINE_UNQUOTED(GHBA_ADDRLEN_T, $ac_cv_type_ghba_addrlen_t,
	[Define as the type of the 2nd argument of gethostbyaddr.])

dnl Checks the flavor of getnameinfo functions.
    AC_CACHE_CHECK(flavor of getnameinfo, ac_cv_flavor_getnameinfo,
    [ac_cv_flavor_getnameinfo=unknown
    AC_TRY_RUN(
    [
    #include <stddef.h>
    #include <sys/types.h>
    #include <sys/socket.h>
    #include <netdb.h>
    int getnameinfo(const struct sockaddr *sa, socklen_t salen, char *host,
                    socklen_t hostlen, char *serv, socklen_t servlen,
                    unsigned int flags) {
	return NULL;
    }
    int main() {
	(void)getnameinfo(NULL, 0, NULL, 0, NULL, 0, 0);
	return 0;
    }
    ], ac_cv_flavor_getnameinfo=glibc2_2_2,,
       ac_cv_flavor_getnameinfo=unknown)
    AC_TRY_RUN(
    [
    #include <stddef.h>
    #include <sys/types.h>
    #include <sys/socket.h>
    #include <netdb.h>
    int getnameinfo(const struct sockaddr *sa, socklen_t salen, char *host,
                    socklen_t hostlen, char *serv, socklen_t servlen,
                    int flags) {
	return NULL;
    }
    int main() {
	(void)getnameinfo(NULL, 0, NULL, 0, NULL, 0, 0);
	return 0;
    }
    ], ac_cv_flavor_getnameinfo=rfc2553bis_03,,
       ac_cv_flavor_getnameinfo=unknown)
    AC_TRY_RUN(
    [
    #include <stddef.h>
    #include <sys/types.h>
    #include <sys/socket.h>
    #include <netdb.h>
    int getnameinfo(const struct sockaddr *sa, socklen_t salen, char *host,
                    size_t hostlen, char *serv, size_t servlen, int flags) {
	return NULL;
    }
    int main() {
	(void)getnameinfo(NULL, 0, NULL, 0, NULL, 0, 0);
	return 0;
    }
    ], ac_cv_flavor_getnameinfo=rfc2553,,
       ac_cv_flavor_getnameinfo=unknown)
    AC_TRY_RUN(
    [
    #include <stddef.h>
    #include <sys/types.h>
    #include <sys/socket.h>
    #include <netdb.h>
    int getnameinfo(const struct sockaddr *sa, size_t salen, char *host,
                    size_t hostlen, char *serv, size_t servlen, int flags) {
	return NULL;
    }
    int main() {
	(void)getnameinfo(NULL, 0, NULL, 0, NULL, 0, 0);
	return 0;
    }
    ], ac_cv_flavor_getnameinfo=rfc2133,,
       ac_cv_flavor_getnameinfo=unknown)
    if test "$ac_cv_func_getnameinfo" = no ; then
	ac_cv_flavor_getnameinfo=none
    fi])

    case "$ac_cv_flavor_getnameinfo" in
    glibc2_2_2)
	ac_cv_type_gni_salen_t='socklen_t'
	ac_cv_type_gni_hostlen_t='socklen_t'
	ac_cv_type_gni_servlen_t='socklen_t'
	ac_cv_type_gni_flags_t='unsigned int'
	;;
    rfc2553bis_03)
	ac_cv_type_gni_salen_t='socklen_t'
	ac_cv_type_gni_hostlen_t='socklen_t'
	ac_cv_type_gni_servlen_t='socklen_t'
	ac_cv_type_gni_flags_t='int'
	;;
    rfc2553)
	ac_cv_type_gni_salen_t='socklen_t'
	ac_cv_type_gni_hostlen_t='size_t'
	ac_cv_type_gni_servlen_t='size_t'
	ac_cv_type_gni_flags_t='int'
	;;
    rfc2133 | none)
	ac_cv_type_gni_salen_t='size_t'
	ac_cv_type_gni_hostlen_t='size_t'
	ac_cv_type_gni_servlen_t='size_t'
	ac_cv_type_gni_flags_t='int'
	;;
    *)
	AC_MSG_ERROR([can't build runidn, since parameter type list of getnameinfo() is unknown to configure.])
    esac
    AC_DEFINE_UNQUOTED(GNI_SALEN_T, $ac_cv_type_gni_salen_t,
	[Define as the type of the 2nd argument of getnameinfo.])
    AC_DEFINE_UNQUOTED(GNI_HOSTLEN_T, $ac_cv_type_gni_hostlen_t,
	[Define as the type of the 4th argument of getnameinfo.])
    AC_DEFINE_UNQUOTED(GNI_SERVLEN_T, $ac_cv_type_gni_servlen_t,
	[Define as the type of the 6th argument of getnameinfo.])
    AC_DEFINE_UNQUOTED(GNI_FLAGS_T, $ac_cv_type_gni_flags_t,
	[Define as the type of the 7th argument of getnameinfo.])
fi

dnl resume here.
dnl Checks the flavor of gethost*_r functions.
if test "$find_gethost_r" = yes; then
    AC_CACHE_CHECK(flavor of gethostbyname_r, ac_cv_flavor_gethost_r,
    [AC_TRY_RUN(
changequote(<<, >>)dnl
<<
#include <stddef.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <stdio.h>
int main()
{
    int err = 0;
    struct hostent hebuf, *hp;
    char buf[10];
    /* Try resolving a invalid name using glibc flavor. */
    (void)gethostbyname_r("@#!", &hebuf, buf, sizeof(buf), &hp, &err);
    if (err != 0)
	return 0;	/* glibc flavor */
    else
	return 1;	/* Sun flavor */
}
>>,
changequote([, ])dnl
	ac_cv_flavor_gethost_r=glibc,
	ac_cv_flavor_gethost_r=sun,
	ac_cv_flavor_gethost_r=sun)])
    if test "$ac_cv_flavor_gethost_r" = "glibc"; then
	AC_DEFINE(GETHOST_R_GLIBC_FLAVOR, 1,
	    [Define if the prototype of gethost*_r is glibc flavor.])
    fi
fi

dnl Find system shared object paths.
AC_FIND_SYSTEM_SHOBJ(libc)
if test "$install_runidn" = yes ; then
    AC_FIND_SYSTEM_SHOBJ(libnsl)
fi

dnl Checks for iconv library.
if test "$liteonly" != yes ; then
    AC_MSG_CHECKING(for iconv)
    saved_CPPFLAGS=$CPPFLAGS
    saved_LIBS=$LIBS
    CPPFLAGS="$CPPFLAGS $ICONVINC"
    LIBS="$LIBS $ICONVLIB"
    AC_TRY_LINK([
    #include <iconv.h>
    ], [
	iconv_t i;
	i = iconv_open("ISO-8859-1", "UTF-8");
    ], [iconv_try_link=yes], [iconv_try_link=no])
    LIBS=$saved_LIBS
    CPPFLAGS=$saved_CPPFLAGS
    AC_MSG_RESULT($iconv_try_link)
    if test "$iconv_try_link" = no ; then
	AC_MSG_ERROR(iconv function not available)
    fi
fi

dnl Check for codeset name for UTF-8.
if test "$liteonly" != yes ; then
    AC_MSG_CHECKING([for codeset name $UTF8_NAME])
    saved_CPPFLAGS=$CPPFLAGS
    saved_LIBS=$LIBS
    CPPFLAGS="$CPPFLAGS $ICONVINC"
    LIBS="$LIBS $ICONVLIB"
    AC_TRY_RUN([
    #include <stddef.h>
    #include <stdlib.h>
    #include <iconv.h>
    #define UTF8_NAME "$UTF8_NAME"
    #define ICONV_FAIL ((iconv_t)(-1))
    /* Check if the codeset name UTF8_NAME is valid by performing iconv_open(). */
    int main() {
	int i;
	/* list of codeset names likely to exist */
	static char *codeset[] = {
	    "ASCII", "ISO-8859-1", "ISO8859-1", "iso8859_1", "8859-1",
	    "Shift_JIS", "SJIS", "sjis", NULL,
	};

	/* First try null conversion. */
	if (iconv_open(UTF8_NAME, UTF8_NAME) != ICONV_FAIL) return 0;

	/* Unfortunately, above check fails on certain systems, such as Solaris. */
	for (i = 0; codeset[i] != NULL; i++) {
	    if (iconv_open(UTF8_NAME, codeset[i]) != ICONV_FAIL) return 0;
	}
	return 1;
    }
    ], utf8_name_valid=yes, utf8_name_valid=no, utf8_name_valid=unknown)
    LIBS=$saved_LIBS
    CPPFLAGS=$saved_CPPFLAGS
    AC_MSG_RESULT($utf8_name_valid)
fi

dnl Output.
AC_CONFIG_HEADER(include/config.h)
AC_OUTPUT(
	Makefile
	include/Makefile
	include/idn/Makefile
	include/mdn/Makefile
	lib/Makefile
	man/Makefile
	tools/Makefile
	tools/idnconv/Makefile
	tools/runidn/Makefile
	tools/runidn/runidn
	map/Makefile
	lib/tests/Makefile
)