X-Git-Url: https://arthur.barton.de/cgi-bin/gitweb.cgi?p=ngircd-alex.git;a=blobdiff_plain;f=configure.in;h=61bf08e939333b6f5b1c1165d516ead18fb23882;hp=49d2debe62218b397b6e0075e032f07e85a11171;hb=ffc5f93ef543189626e0e4e269f125aea15a5053;hpb=558fe6b453a08c8924060b02d66f32a3683cc821

diff --git a/configure.in b/configure.in
index 49d2debe..61bf08e9 100644
--- a/configure.in
+++ b/configure.in
@@ -1,6 +1,6 @@
 #
 # ngIRCd -- The Next Generation IRC Daemon
-# Copyright (c)2001-2004 Alexander Barton <alex@barton.de>
+# Copyright (c)2001-2008 Alexander Barton <alex@barton.de>
 #
 # 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
@@ -8,13 +8,11 @@
 # (at your option) any later version.
 # Please read the file COPYING, README and AUTHORS for more information.
 #
-# $Id: configure.in,v 1.102 2004/04/11 13:20:24 alex Exp $
-#
 
 # -- Initialisation --
 
 AC_PREREQ(2.50)
-AC_INIT(ngircd, CVSHEAD)
+AC_INIT(ngircd, dev)
 AC_CONFIG_SRCDIR(src/ngircd/ngircd.c)
 AC_CANONICAL_TARGET
 AM_INIT_AUTOMAKE(1.6)
@@ -30,7 +28,8 @@ AH_TEMPLATE([SYSLOG], [Define if syslog should be used for logging])
 AH_TEMPLATE([ZLIB], [Define if zlib compression should be enabled])
 AH_TEMPLATE([TCPWRAP], [Define if TCP wrappers should be used])
 AH_TEMPLATE([IRCPLUS], [Define if IRC+ protocol should be used])
-AH_TEMPLATE([RENDEZVOUS], [Define if Rendezvous support should be included])
+AH_TEMPLATE([WANT_IPV6], [Define if IPV6 protocol should be enabled])
+AH_TEMPLATE([ZEROCONF], [Define if support for Zeroconf should be included])
 AH_TEMPLATE([IDENTAUTH], [Define if the server should do IDENT requests])
 
 AH_TEMPLATE([TARGET_OS], [Target operating system name])
@@ -53,12 +52,31 @@ AC_PROG_RANLIB
 
 AM_C_PROTOTYPES
 AC_C_CONST
+AC_C_INLINE
 
 # -- Hard coded system and compiler dependencies/features/options ... --
 
+AC_DEFUN([GCC_STACK_PROTECT_CC],[
+  ssp_cc=yes
+  # we use -fstack-protector-all for the test to enfoce the use of the guard variable 
+  AC_MSG_CHECKING([whether ${CC} accepts -fstack-protector])
+  ssp_old_cflags="$CFLAGS"
+  CFLAGS="$CFLAGS -fstack-protector-all"
+  AC_TRY_LINK(,,, ssp_cc=no)
+  echo $ssp_cc
+  CFLAGS="$ssp_old_cflags"
+  if test "X$ssp_cc" = "Xyes"; then
+      CFLAGS="$CFLAGS -fstack-protector"
+      AC_DEFINE([ENABLE_SSP_CC], 1, [Define if SSP C support is enabled.])
+  fi
+])
+
+
 if test "$GCC" = "yes"; then
 	# We are using the GNU C compiler. Good!
 	CFLAGS="$CFLAGS -pipe -W -Wall -Wpointer-arith -Wstrict-prototypes"
+
+	GCC_STACK_PROTECT_CC
 fi
 
 case "$target_os" in
@@ -85,14 +103,14 @@ AC_CHECK_HEADERS([ \
 	strings.h sys/socket.h sys/time.h unistd.h \
 	],,AC_MSG_ERROR([required C header missing!]))
 
-AC_CHECK_HEADERS([arpa/inet.h ctype.h malloc.h stdint.h varargs.h])
+AC_CHECK_HEADERS([arpa/inet.h ctype.h malloc.h stdbool.h stddef.h varargs.h])
 
 # -- Datatypes --
 
 AC_MSG_CHECKING(whether socklen_t exists)
 AC_TRY_COMPILE([
-	#include <sys/socket.h>
-	#include <sys/types.h>
+#include <sys/types.h>
+#include <sys/socket.h>
 	],[
 	socklen_t a, b;
 	a = 2; b = 4; a += b;
@@ -105,6 +123,7 @@ AC_TRY_COMPILE([
 AC_TYPE_SIGNAL
 AC_TYPE_SIZE_T
 
+
 # -- Libraries --
 
 AC_CHECK_LIB(UTIL,memmove)
@@ -117,22 +136,24 @@ AC_FUNC_FORK
 AC_FUNC_STRFTIME
 
 AC_CHECK_FUNCS([ \
-	bind gethostbyaddr gethostbyname gethostname inet_ntoa malloc memmove \
-	memset realloc setsid setsockopt socket strcasecmp strchr strerror \
-	strstr waitpid],,AC_MSG_ERROR([required function missing!]))
+	bind gethostbyaddr gethostbyname gethostname inet_ntoa \
+	setsid setsockopt socket strcasecmp waitpid],,AC_MSG_ERROR([required function missing!]))
 
-AC_CHECK_FUNCS(inet_aton isdigit sigaction snprintf vsnprintf strlcpy strlcat)
-
-AC_CHECK_FUNCS(select,[AC_CHECK_HEADERS(sys/select.h)],
-	AC_MSG_ERROR([required function select() is missing!])
-)
+AC_CHECK_FUNCS(inet_aton isdigit sigaction snprintf vsnprintf strdup strlcpy strlcat strtok_r)
 
 # -- Configuration options --
 
+# use syslog?
+
 x_syslog_on=no
 AC_ARG_WITH(syslog,
 	[  --without-syslog        disable syslog (autodetected by default)],
-	[	if test "$withval" = "yes"; then
+	[	if test "$withval" != "no"; then
+			if test "$withval" != "yes"; then
+				CFLAGS="-I$withval/include $CFLAGS"
+				CPPFLAGS="-I$withval/include $CPPFLAGS"
+				LDFLAGS="-L$withval/lib $LDFLAGS"
+			fi
 			AC_CHECK_LIB(be, syslog)
 			AC_CHECK_FUNCS(syslog, x_syslog_on=yes,
 				AC_MSG_ERROR([Can't enable syslog!])
@@ -146,13 +167,20 @@ AC_ARG_WITH(syslog,
 )
 if test "$x_syslog_on" = "yes"; then
 	AC_DEFINE(SYSLOG, 1)
-	AC_CHECK_HEADERS(syslog.h)
+	AC_CHECK_HEADERS(syslog.h,,AC_MSG_ERROR([required C header missing!]))
 fi
 
+# use zlib compression?
+
 x_zlib_on=no
 AC_ARG_WITH(zlib,
 	[  --without-zlib          disable zlib compression (autodetected by default)],
-	[	if test "$withval" = "yes"; then
+	[	if test "$withval" != "no"; then
+			if test "$withval" != "yes"; then
+				CFLAGS="-I$withval/include $CFLAGS"
+				CPPFLAGS="-I$withval/include $CPPFLAGS"
+				LDFLAGS="-L$withval/lib $LDFLAGS"
+			fi
 			AC_CHECK_LIB(z, deflate)
 			AC_CHECK_FUNCS(deflate, x_zlib_on=yes,
 				AC_MSG_ERROR([Can't enable zlib!])
@@ -165,20 +193,187 @@ AC_ARG_WITH(zlib,
 )
 if test "$x_zlib_on" = "yes"; then
 	AC_DEFINE(ZLIB, 1)
-	AC_CHECK_HEADERS(zlib.h)
+	AC_CHECK_HEADERS(zlib.h,,AC_MSG_ERROR([required C header missing!]))
 fi
 
+# detect which IO API to use:
+
+x_io_backend=none
+
+AC_ARG_WITH(select,
+	[  --without-select        disable select IO support (autodetected by default)],
+	[	if test "$withval" != "no"; then
+			if test "$withval" != "yes"; then
+				CFLAGS="-I$withval/include $CFLAGS"
+				CPPFLAGS="-I$withval/include $CPPFLAGS"
+				LDFLAGS="-L$withval/lib $LDFLAGS"
+			fi
+			AC_CHECK_FUNCS(select, x_io_select=yes,
+				AC_MSG_ERROR([Can't enable select IO support!])
+			)
+		fi
+	],
+	[
+		AC_CHECK_FUNCS(select, x_io_select=yes)
+	]
+)
+
+AC_ARG_WITH(poll,
+	[  --without-poll          disable poll support (autodetected by default)],
+	[	if test "$withval" != "no"; then
+			if test "$withval" != "yes"; then
+				CFLAGS="-I$withval/include $CFLAGS"
+				CPPFLAGS="-I$withval/include $CPPFLAGS"
+				LDFLAGS="-L$withval/lib $LDFLAGS"
+			fi
+			AC_CHECK_FUNCS(poll, x_io_backend=poll\(\),
+				AC_MSG_ERROR([Can't enable poll IO support!])
+			)
+		fi
+	],
+	[
+		AC_CHECK_FUNCS(poll, x_io_backend=poll\(\))
+	]
+)
+
+AC_ARG_WITH(devpoll,
+	[  --without-devpoll       disable /dev/poll IO support (autodetected by default)],
+	[	if test "$withval" != "no"; then
+			if test "$withval" != "yes"; then
+				CFLAGS="-I$withval/include $CFLAGS"
+				CPPFLAGS="-I$withval/include $CPPFLAGS"
+				LDFLAGS="-L$withval/lib $LDFLAGS"
+			fi
+
+				AC_CHECK_HEADERS(sys/devpoll.h,,AC_MSG_ERROR([required C header missing!]))
+		fi
+	],
+	[
+		AC_CHECK_HEADERS(sys/devpoll.h, x_io_backend=/dev/poll)
+	]
+)
+
+AC_ARG_WITH(epoll,
+	[  --without-epoll         disable epoll IO support (autodetected by default)],
+	[	if test "$withval" != "no"; then
+			if test "$withval" != "yes"; then
+				CFLAGS="-I$withval/include $CFLAGS"
+				CPPFLAGS="-I$withval/include $CPPFLAGS"
+				LDFLAGS="-L$withval/lib $LDFLAGS"
+			fi
+			AC_CHECK_FUNCS(epoll_create, x_io_epoll=yes,
+				AC_MSG_ERROR([Can't enable epoll IO support!])
+			)
+		fi
+	],
+	[
+		AC_CHECK_FUNCS(epoll_create, x_io_epoll=yes)
+	]
+)
+
+AC_ARG_WITH(kqueue,
+	[  --without-kqueue        disable kqueue IO support (autodetected by default)],
+	[	if test "$withval" != "no"; then
+			if test "$withval" != "yes"; then
+				CFLAGS="-I$withval/include $CFLAGS"
+				CPPFLAGS="-I$withval/include $CPPFLAGS"
+				LDFLAGS="-L$withval/lib $LDFLAGS"
+			fi
+			AC_CHECK_FUNCS(kqueue, x_io_backend=kqueue\(\),
+				AC_MSG_ERROR([Can't enable kqueue IO support!])
+			)
+		fi
+	],
+	[
+		AC_CHECK_FUNCS(kqueue, x_io_backend=kqueue\(\))
+	]
+)
+
+if test "$x_io_epoll" = "yes" -a "$x_io_select" = "yes"; then
+	# when epoll() and select() are available, we'll use both!
+	x_io_backend="epoll(), select()"
+else
+	if test "$x_io_epoll" = "yes"; then
+		# we prefere epoll() if it is available
+		x_io_backend="epoll()"
+	else
+		if test "$x_io_select" = "yes" -a "$x_io_backend" = "none"; then
+			# we'll use select, when available and no "better"
+			# interface has been detected ...
+			x_io_backend="select()"
+		fi
+	fi
+fi
+
+if test "$x_io_backend" = "none"; then
+	AC_MSG_ERROR([No useabe IO API activated/found!?])
+fi
+
+# use SSL?
+
+AC_ARG_WITH(openssl,
+	[  --with-openssl          enable SSL support using OpenSSL],
+	[	if test "$withval" = "yes"; then
+			if test "$withval" != "yes"; then
+				CFLAGS="-I$withval/include $CFLAGS"
+				CPPFLAGS="-I$withval/include $CPPFLAGS"
+				LDFLAGS="-L$withval/lib $LDFLAGS"
+			fi
+			AC_CHECK_LIB(crypto, BIO_s_mem)
+			AC_CHECK_LIB(ssl, SSL_library_init)
+			AC_CHECK_FUNCS(SSL_library_init, x_ssl_openssl=yes,
+				AC_MSG_ERROR([Can't enable openssl])
+			)
+		fi
+	]
+)
+
+AC_ARG_WITH(gnutls,
+	[  --with-gnutls           enable SSL support using gnutls],
+	[	if test "$withval" = "yes"; then
+			if test "$withval" != "yes"; then
+				CFLAGS="-I$withval/include $CFLAGS"
+				CPPFLAGS="-I$withval/include $CPPFLAGS"
+				LDFLAGS="-L$withval/lib $LDFLAGS"
+			fi
+			AC_CHECK_LIB(gnutls, gnutls_global_init)
+			AC_CHECK_FUNCS(gnutls_global_init, x_ssl_gnutls=yes,
+				AC_MSG_ERROR([Can't enable gnutls])
+			)
+		fi
+	]
+)
+
+x_ssl_lib="no"
+if test "$x_ssl_gnutls" = "yes"; then
+	if test "$x_ssl_openssl" = "yes";then
+		AC_MSG_ERROR([Cannot enable both gnutls and openssl])
+	fi
+	x_ssl_lib=gnutls
+fi
+if test "$x_ssl_openssl" = "yes"; then
+	x_ssl_lib=openssl
+fi
+
+# use TCP wrappers?
+
 x_tcpwrap_on=no
 AC_ARG_WITH(tcp-wrappers,
 	[  --with-tcp-wrappers     enable TCP wrappers support],
-	[	if test "$withval" = "yes"; then
-			AC_CHECK_LIB(wrap, tcpd_warn)
+	[	if test "$withval" != "no"; then
+			if test "$withval" != "yes"; then
+				CFLAGS="-I$withval/include $CFLAGS"
+				CPPFLAGS="-I$withval/include $CPPFLAGS"
+				LDFLAGS="-L$withval/lib $LDFLAGS"
+			fi
 			AC_MSG_CHECKING(for hosts_access)
+			LIBS="-lwrap $LIBS"
 			AC_TRY_LINK([
-				#include <tcpd.h>
+#include <tcpd.h>
+int allow_severity = 0;
+int deny_severity = 0;
 				],[
-				void *ptr;
-				ptr = hosts_access;
+				tcpd_warn("link test");
 				],[
 				AC_MSG_RESULT(yes)
 				AC_DEFINE(TCPWRAP, 1)
@@ -191,25 +386,67 @@ AC_ARG_WITH(tcp-wrappers,
 	]
 )
 
-x_rendezvous_on=no
-AC_ARG_WITH(rendezvous,
-	[  --with-rendezvous       enable support for "Rendezvous"],
-	[	if test "$withval" = "yes"; then
-			AC_CHECK_FUNCS(DNSServiceRegistrationCreate, x_rendezvous_on=yes,
-				AC_MSG_ERROR([Can't enable Rendezvous!])
-			)
+# include support for "zeroconf"?
+
+x_zeroconf_on=no
+AC_ARG_WITH(zeroconf,
+	[  --with-zeroconf         enable support for "Zeroconf"],
+	[	if test "$withval" != "no"; then
+			if test "$withval" != "yes"; then
+				CFLAGS="-I$withval/include $CFLAGS"
+				CPPFLAGS="-I$withval/include $CPPFLAGS"
+				LDFLAGS="-L$withval/lib $LDFLAGS"
+			fi
+			AC_CHECK_FUNCS(DNSServiceRegistrationCreate, x_zeroconf_on=osx,
+			[
+				AC_CHECK_LIB(pthread, pthread_mutexattr_init)
+				AC_CHECK_LIB(howl, sw_discovery_init)
+				AC_CHECK_FUNCS(sw_discovery_init, \
+				 x_zeroconf_on=howl, \
+				 AC_MSG_ERROR([Can't enable Zeroconf!]))
+			])
 		fi
 	]
 )
-if test "$x_rendezvous_on" = "yes"; then
-	AC_DEFINE(RENDEZVOUS, 1)
-	AC_CHECK_HEADERS(DNSServiceDiscovery/DNSServiceDiscovery.h mach/port.h)
+if test "$x_zeroconf_on" = "osx"; then
+	AC_CHECK_HEADERS([DNSServiceDiscovery/DNSServiceDiscovery.h \
+	 mach/port.h],,AC_MSG_ERROR([required C header missing!]))
+	AC_DEFINE(ZEROCONF, 1)
+fi
+if test "$x_zeroconf_on" = "howl"; then
+	for dir in /usr/local/include /usr/local/include/howl* \
+	 /usr/include /usr/include/howl* \
+	 /usr/local/include/avahi* /usr/include/avahi*; do
+	 	test -d "$dir" || continue
+		AC_MSG_CHECKING([for Howl headers in $dir])
+		if test -f "$dir/rendezvous/rendezvous.h"; then
+			if test "$dir" != "/usr/local/include" -a \
+			 "$dir" != "/usr/include"; then
+				CFLAGS="-I$dir $CFLAGS"
+				CPPFLAGS="-I$dir $CPPFLAGS"
+			fi
+			AC_MSG_RESULT(yes)
+			break
+		else
+			AC_MSG_RESULT(no)
+		fi
+	done
+	AC_CHECK_HEADERS([rendezvous/rendezvous.h],, \
+	 AC_MSG_ERROR([required C header missing!]))
+	AC_DEFINE(ZEROCONF, 1)
 fi
 
+# do IDENT requests using libident?
+
 x_identauth_on=no
 AC_ARG_WITH(ident,
 	[  --with-ident            enable "IDENT" ("AUTH") protocol support],
-	[	if test "$withval" = "yes"; then
+	[	if test "$withval" != "no"; then
+			if test "$withval" != "yes"; then
+				CFLAGS="-I$withval/include $CFLAGS"
+				CPPFLAGS="-I$withval/include $CPPFLAGS"
+				LDFLAGS="-L$withval/lib $LDFLAGS"
+			fi
 			AC_CHECK_LIB(ident, ident_id)
 			AC_CHECK_FUNCS(ident_id, x_identauth_on=yes,
 				AC_MSG_ERROR([Can't enable IDENT support!])
@@ -219,9 +456,11 @@ AC_ARG_WITH(ident,
 )
 if test "$x_identauth_on" = "yes"; then
 	AC_DEFINE(IDENTAUTH, 1)
-	AC_CHECK_HEADERS(ident.h)
+	AC_CHECK_HEADERS(ident.h,,AC_MSG_ERROR([required C header missing!]))
 fi
 
+# compile in IRC+ protocol support?
+
 x_ircplus_on=yes
 AC_ARG_ENABLE(ircplus,
 	[  --disable-ircplus       disable IRC+ protocol],
@@ -231,6 +470,21 @@ if test "$x_ircplus_on" = "yes"; then
 	AC_DEFINE(IRCPLUS, 1)
 fi
 
+# enable support for IPv6?
+x_ipv6_on=no
+AC_ARG_ENABLE(ipv6,
+	[  --enable-ipv6           enable IPv6 protocol support],
+	if test "$enableval" = "yes"; then x_ipv6_on=yes; fi
+)
+if test "$x_ipv6_on" = "yes"; then
+	AC_CHECK_FUNCS([ \
+		getaddrinfo getnameinfo \
+		],,AC_MSG_ERROR([required function missing for IPv6 support!]))
+	AC_DEFINE(WANT_IPV6, 1)
+fi
+
+# compile in IRC "sniffer"?
+
 x_sniffer_on=no; x_debug_on=no
 AC_ARG_ENABLE(sniffer,
 	[  --enable-sniffer        enable IRC traffic sniffer (enables debug mode)],
@@ -240,6 +494,8 @@ AC_ARG_ENABLE(sniffer,
 	fi
 )
 
+# enable additional debugging code?
+
 AC_ARG_ENABLE(debug,
 	[  --enable-debug          show additional debug output],
 	if test "$enableval" = "yes"; then x_debug_on=yes; fi
@@ -247,8 +503,11 @@ AC_ARG_ENABLE(debug,
 if test "$x_debug_on" = "yes"; then
 	AC_DEFINE(DEBUG, 1)
 	test "$GCC" = "yes" && CFLAGS="-pedantic $CFLAGS"
+	AC_CHECK_FUNCS(mtrace)
 fi
 
+# enable "strict RFC rules"?
+
 x_strict_rfc_on=no
 AC_ARG_ENABLE(strict-rfc,
 	[  --enable-strict-rfc     strict RFC conformance -- may break clients!],
@@ -273,8 +532,10 @@ test -n "$CFLAGS_END" && CFLAGS="$CFLAGS $CFLAGS_END"
 AC_OUTPUT([ \
 	Makefile \
 	doc/Makefile \
+	doc/src/Makefile \
 	src/Makefile \
 	src/portab/Makefile \
+	src/ipaddr/Makefile \
 	src/tool/Makefile \
 	src/ngircd/Makefile \
 	src/testsuite/Makefile \
@@ -282,6 +543,8 @@ AC_OUTPUT([ \
 	contrib/Makefile \
 	contrib/Debian/Makefile \
 	contrib/MacOSX/Makefile \
+	contrib/MacOSX/ngIRCd.xcodeproj/Makefile \
+	contrib/MacOSX/ngIRCd.pmdoc/Makefile \
 ])
 
 type dpkg >/dev/null 2>&1
@@ -295,7 +558,7 @@ fi
 # -- Result --
 
 echo
-echo "ngIRCd has been configured with the following options:"
+echo "ngIRCd $PACKAGE_VERSION has been configured with the following options:"
 echo
 
 # Someone please show me a better way :)  [borrowed by OpenSSH]
@@ -321,8 +584,8 @@ echo
 
 echo $ECHO_N "     Syslog support: $ECHO_C"
 test "$x_syslog_on" = "yes" \
-	&& echo $ECHO_N "yes $ECHO_C" \
-	|| echo $ECHO_N "no  $ECHO_C"
+	&& echo $ECHO_N "yes   $ECHO_C" \
+	|| echo $ECHO_N "no    $ECHO_C"
 echo $ECHO_N "  Enable debug code: $ECHO_C"
 test "$x_debug_on" = "yes" \
 	&& echo "yes" \
@@ -330,8 +593,8 @@ test "$x_debug_on" = "yes" \
 
 echo $ECHO_N "   zlib compression: $ECHO_C"
 test "$x_zlib_on" = "yes" \
-	&& echo $ECHO_N "yes $ECHO_C" \
-	|| echo $ECHO_N "no  $ECHO_C"
+	&& echo $ECHO_N "yes   $ECHO_C" \
+	|| echo $ECHO_N "no    $ECHO_C"
 echo $ECHO_N "        IRC sniffer: $ECHO_C"
 test "$x_sniffer_on" = "yes" \
 	&& echo "yes" \
@@ -339,17 +602,25 @@ test "$x_sniffer_on" = "yes" \
 
 echo $ECHO_N "   Use TCP Wrappers: $ECHO_C"
 test "$x_tcpwrap_on" = "yes" \
-	&& echo $ECHO_N "yes $ECHO_C" \
-	|| echo $ECHO_N "no  $ECHO_C"
+	&& echo $ECHO_N "yes   $ECHO_C" \
+	|| echo $ECHO_N "no    $ECHO_C"
 echo $ECHO_N "    Strict RFC mode: $ECHO_C"
 test "$x_strict_rfc_on" = "yes" \
 	&& echo "yes" \
 	|| echo "no"
 
-echo $ECHO_N " Rendezvous support: $ECHO_C"
-test "$x_rendezvous_on" = "yes"	\
-	&& echo $ECHO_N "yes $ECHO_C" \
-	|| echo $ECHO_N "no  $ECHO_C"
+echo $ECHO_N "   Zeroconf support: $ECHO_C"
+case "$x_zeroconf_on" in
+	osx)
+		echo $ECHO_N "Apple $ECHO_C"
+		;;
+	howl)
+		echo $ECHO_N "Howl  $ECHO_C"
+		;;
+	*)
+		echo $ECHO_N "no    $ECHO_C"
+		;;
+esac
 echo $ECHO_N "      IRC+ protocol: $ECHO_C"
 test "$x_ircplus_on" = "yes" \
 	&& echo "yes" \
@@ -357,9 +628,17 @@ test "$x_ircplus_on" = "yes" \
 
 echo $ECHO_N "      IDENT support: $ECHO_C"
 test "$x_identauth_on" = "yes" \
-	&& echo $ECHO_N "yes $ECHO_C" \
-	|| echo $ECHO_N "no  $ECHO_C"
+	&& echo $ECHO_N "yes   $ECHO_C" \
+	|| echo $ECHO_N "no    $ECHO_C"
+echo $ECHO_N "        I/O backend: $ECHO_C"
+	echo "\"$x_io_backend\""
+
+echo $ECHO_N "      IPv6 protocol: $ECHO_C"
+echo $ECHO_N "$x_ipv6_on    $ECHO_C"
 
-echo; echo
+echo $ECHO_N "        SSL support: $ECHO_C"
+echo "$x_ssl_lib"
+
+echo
 
 # -eof-