]> arthur.barton.de Git - ngircd-alex.git/blobdiff - configure.in
Add doc/Contributing.txt to distribution archive
[ngircd-alex.git] / configure.in
index d76aa74ca36e0f1a8480203ac29a2aae6efe5b36..34c76e164e5fc06f21ba7078727d8401b45c4166 100644 (file)
@@ -1,6 +1,6 @@
 #
 # ngIRCd -- The Next Generation IRC Daemon
-# Copyright (c)2001-2003 by Alexander Barton (alex@barton.de)
+# Copyright (c)2001-2012 Alexander Barton (alex@barton.de) and Contributors
 #
 # 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
@@ -8,39 +8,48 @@
 # (at your option) any later version.
 # Please read the file COPYING, README and AUTHORS for more information.
 #
-# $Id: configure.in,v 1.91 2003/04/23 01:07:59 alex Exp $
-#
 
-# -- Initialisierung --
+define(VERSION_ID,esyscmd(git describe|sed -e 's/rel-//g'|sed -e 's/-/~/'|tr -d \\n))
+
+# -- Initialisation --
+
+AC_PREREQ([2.61])
+AC_INIT([ngIRCd], VERSION_ID,
+       [ngircd-ml@ngircd.barton.de], [ngircd], [http://ngircd.barton.de/])
+
+AC_CONFIG_SRCDIR([src/ngircd/ngircd.c])
+AC_CONFIG_HEADER([src/config.h])
+AC_CANONICAL_HOST
 
-AC_PREREQ(2.50)
-AC_INIT(ngircd, CVSHEAD)
-AC_CONFIG_SRCDIR(src/ngircd/ngircd.c)
-AC_CANONICAL_TARGET
-AM_INIT_AUTOMAKE(1.6)
-AM_CONFIG_HEADER(src/config.h)
+AM_INIT_AUTOMAKE([1.10])
 
-# -- Templates fuer config.h --
+m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
+
+# -- Templates for config.h --
 
 AH_TEMPLATE([DEBUG], [Define if debug-mode should be enabled])
+AH_TEMPLATE([HAVE_sockaddr_in_len], [Define if sockaddr_in.sin_len exists])
 AH_TEMPLATE([HAVE_socklen_t], [Define if socklen_t exists])
+AH_TEMPLATE([IDENTAUTH], [Define if the server should do IDENT requests])
+AH_TEMPLATE([IRCPLUS], [Define if IRC+ protocol should be used])
+AH_TEMPLATE([PAM], [Define if PAM should be used])
 AH_TEMPLATE([SNIFFER], [Define if IRC sniffer should be enabled])
 AH_TEMPLATE([STRICT_RFC], [Define if ngIRCd should behave strict RFC compliant])
-AH_TEMPLATE([USE_SYSLOG], [Define if syslog should be used for logging])
-AH_TEMPLATE([USE_ZLIB], [Define if zlib compression should be enabled])
-AH_TEMPLATE([USE_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([SYSLOG], [Define if syslog should be used for logging])
+AH_TEMPLATE([TCPWRAP], [Define if TCP wrappers should be used])
+AH_TEMPLATE([WANT_IPV6], [Define if IPV6 protocol should be enabled])
+AH_TEMPLATE([ZLIB], [Define if zlib compression should be enabled])
 
-AH_TEMPLATE([TARGET_OS], [Target operating system name])
-AH_TEMPLATE([TARGET_VENDOR], [Target system vendor])
-AH_TEMPLATE([TARGET_CPU], [Target CPU name])
+AH_TEMPLATE([HOST_OS], [Target operating system name])
+AH_TEMPLATE([HOST_VENDOR], [Target system vendor])
+AH_TEMPLATE([HOST_CPU], [Target CPU name])
 
 # -- C Compiler --
 
 AC_PROG_CC
+AC_PROG_CC_STDC
 
-# -- Hilfsprogramme --
+# -- Helper programs --
 
 AC_PROG_AWK
 AC_PROG_INSTALL
@@ -50,60 +59,71 @@ AC_PROG_RANLIB
 
 # -- Compiler Features --
 
-AC_LANG_C
-
-AM_C_PROTOTYPES
 AC_C_CONST
+AC_C_INLINE
+AM_C_PROTOTYPES
 
-# -- Defines --
+# -- 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 `uname` = "Linux"; then
-       # define _POSIX_SOURCE, _GNU_SOURCE and _BSD_SOURCE when compiling
-       # on Linux (glibc-based systems):
-       AC_MSG_RESULT([detected Linux, defining _POSIX_SOURCE, _GNU_SOURCE and _BSD_SOURCE])
-       add_DEFINES="-D_POSIX_SOURCE -D_GNU_SOURCE -D_BSD_SOURCE $add_DEFINES"
-fi
+if test "$GCC" = "yes"; then
+       # We are using the GNU C compiler. Good!
+       CFLAGS="$CFLAGS -pipe -W -Wall -Wpointer-arith -Wstrict-prototypes"
 
-if test `uname` = "A/UX"; then
-       # define _POSIX_SOURCE when compiling on A/UX:
-       AC_MSG_RESULT([detected A/UX, defining _POSIX_SOURCE])
-       add_DEFINES="-D_POSIX_SOURCE $add_DEFINES"
+       GCC_STACK_PROTECT_CC
 fi
 
-if test `uname` = "HP-UX"; then
-       # define _XOPEN_SOURCE_EXTENDED when compiling on HP-UX (11.11):
-       AC_MSG_RESULT([detected HP-UX, defining _XOPEN_SOURCE_EXTENDED])
-       add_DEFINES="-D_XOPEN_SOURCE_EXTENDED $add_DEFINES"
-fi
+case "$host_os" in
+       hpux*)
+               # This is HP/UX, we need to define _XOPEN_SOURCE_EXTENDED
+               # (tested with HP/UX 11.11)
+               CFLAGS="$CFLAGS -D_XOPEN_SOURCE_EXTENDED"
+               ;;
+esac
 
-if test `uname` = "SunOS"; then
-       # define _XOPEN_SOURCE, _XOPEN_SOURCE_EXTENDED=1 and __EXTENSIONS__
-       # when compiling on SunOS (tested with 5.6):
-       AC_MSG_RESULT([detected SunOS, defining _XOPEN_SOURCE, _XOPEN_SOURCE_EXTENDED=1 and __EXTENSIONS__])
-       add_DEFINES="-D_XOPEN_SOURCE -D_XOPEN_SOURCE_EXTENDED=1 -D__EXTENSIONS__ $add_DEFINES"
-fi
+# Add additional CFLAGS, eventually specified on the command line:
+test -n "$CFLAGS_ADD" && CFLAGS="$CFLAGS $CFLAGS_ADD"
 
-# -- Header --
+CFLAGS="$CFLAGS -DSYSCONFDIR='\"\$(sysconfdir)\"'"
 
-AC_HEADER_STDC
-
-AC_HEADER_TIME
+# -- Headers --
 
+AC_HEADER_STDC
 AC_HEADER_SYS_WAIT
+AC_HEADER_TIME
 
+# Required header files
 AC_CHECK_HEADERS([ \
-       ctype.h errno.h fcntl.h netdb.h netinet/in.h stdlib.h string.h \
+       fcntl.h netdb.h netinet/in.h netinet/in_systm.h stdlib.h string.h \
        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])
+# Optional header files
+AC_CHECK_HEADERS_ONCE([ \
+       arpa/inet.h inttypes.h malloc.h netinet/ip.h stdbool.h stddef.h \
+       stdint.h varargs.h \
+       ])
 
-# -- Datentypen --
+# -- 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;
@@ -113,61 +133,90 @@ AC_TRY_COMPILE([
        AC_MSG_RESULT(no)
 ])
 
+AC_TYPE_PID_T
 AC_TYPE_SIGNAL
-
 AC_TYPE_SIZE_T
+AC_TYPE_SSIZE_T
+AC_TYPE_UID_T
+AC_TYPE_UINT16_T
+AC_TYPE_UINT32_T
+AC_TYPE_UINT8_T
 
-# -- Libraries --
+AC_CHECK_MEMBER([struct sockaddr_in.sin_len], AC_DEFINE(HAVE_sockaddr_in_len),,
+ [#include <arpa/inet.h>])
 
-AC_CHECK_LIB(UTIL,memmove)
-AC_CHECK_LIB(socket,bind)
-AC_CHECK_LIB(nsl,gethostent)
+# -- Libraries --
 
-# -- Funktionen --
+# memmove: A/UX libUTIL
+AC_SEARCH_LIBS([memmove], [UTIL], [], [
+       AC_MSG_ERROR([unable to find the memmove() function])
+])
+# gethostbyname: Solaris libnsl
+AC_SEARCH_LIBS([gethostbyname], [nsl], [], [
+       AC_MSG_ERROR([unable to find the gethostbyname() function])
+])
+# bind: SVR4 libsocket
+AC_SEARCH_LIBS([bind], [socket], [], [
+       AC_MSG_ERROR([unable to find the bind() function])
+])
 
-AC_FUNC_MALLOC
+# -- Functions --
 
 AC_FUNC_FORK
-
 AC_FUNC_STRFTIME
 
+# Required functions
 AC_CHECK_FUNCS([ \
-       bind gethostbyaddr gethostbyname gethostname inet_ntoa memmove \
-       memset setsockopt socket strcasecmp strchr strerror strstr waitpid \
-       ],,AC_MSG_ERROR([required function missing!]))
+       alarm dup2 endpwent gethostbyaddr gethostbyname gethostname \
+       gettimeofday inet_ntoa memmove memset setsid socket strcasecmp \
+       strchr strcspn strerror strncasecmp strrchr strspn strstr \
+       ],,
+       AC_MSG_ERROR([required function missing!]))
 
-AC_CHECK_FUNCS(inet_aton isdigit sigaction snprintf vsnprintf strlcpy strlcat)
+# Optional functions
+AC_CHECK_FUNCS_ONCE([ \
+       gai_strerror getaddrinfo getnameinfo inet_aton sigaction sigprocmask \
+       snprintf vsnprintf strdup strlcpy strlcat strtok_r waitpid])
 
-AC_CHECK_FUNCS(select,[AC_CHECK_HEADERS(sys/select.h)],
-       AC_MSG_ERROR([required function select() is missing!])
-)
+# -- Configuration options --
 
-# -- Konfigurationsoptionen --
+# use syslog?
 
 x_syslog_on=no
 AC_ARG_WITH(syslog,
-       [  --without-syslog        disable syslog (autodetected by default)],
-       [       if test "$withval" = "yes"; then
-                       AC_CHECK_LIB(be, syslog)
-                       AC_CHECK_FUNCS(syslog, x_syslog_on=yes,
+       AS_HELP_STRING([--without-syslog],
+                      [disable syslog (autodetected by default)]),
+       [       if test "$withval" != "no"; then
+                       if test "$withval" != "yes"; then
+                               CFLAGS="-I$withval/include $CFLAGS"
+                               CPPFLAGS="-I$withval/include $CPPFLAGS"
+                               LDFLAGS="-L$withval/lib $LDFLAGS"
+                       fi
+                       AC_SEARCH_LIBS([syslog], [be], [x_syslog_on=yes], [
                                AC_MSG_ERROR([Can't enable syslog!])
-                       )
+                       ])
                fi
        ],
-       [
-               AC_CHECK_LIB(be, syslog)
-               AC_CHECK_FUNCS(syslog, x_syslog_on=yes)
+       [       AC_SEARCH_LIBS([syslog], [be], [x_syslog_on=yes])
        ]
 )
 if test "$x_syslog_on" = "yes"; then
-       AC_DEFINE(USE_SYSLOG, 1)
-       AC_CHECK_HEADERS(syslog.h)
+       AC_DEFINE(SYSLOG, 1)
+       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 "$withval" = "yes"; then
+       AS_HELP_STRING([--without-zlib],
+                      [disable zlib compression (autodetected by default)]),
+       [       if test "$withval" != "no"; then
+                       if test "$withval" != "yes"; then
+                               CFLAGS="-I$withval/include $CFLAGS"
+                               CPPFLAGS="-I$withval/include $CPPFLAGS"
+                               LDFLAGS="-L$withval/lib $LDFLAGS"
+                       fi
                        AC_CHECK_LIB(z, deflate)
                        AC_CHECK_FUNCS(deflate, x_zlib_on=yes,
                                AC_MSG_ERROR([Can't enable zlib!])
@@ -179,24 +228,207 @@ AC_ARG_WITH(zlib,
        ]
 )
 if test "$x_zlib_on" = "yes"; then
-       AC_DEFINE(USE_ZLIB, 1)
-       AC_CHECK_HEADERS(zlib.h)
+       AC_DEFINE(ZLIB, 1)
+       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,
+       AS_HELP_STRING([--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 $LDFLAGS"
+                       fi
+                       AC_CHECK_FUNCS(select, x_io_select=yes,
+                               AC_MSG_ERROR([Can't enable select IO support!])
+                       )
+               fi
+       ],
+       [
+               AC_CHECK_FUNCS(select, x_io_select=yes)
+       ]
+)
+
+AC_ARG_WITH(poll,
+       AS_HELP_STRING([--without-poll],
+                      [disable poll support (autodetected by default)]),
+       [       if test "$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, [
+                               AC_CHECK_HEADERS(poll.h,
+                                       x_io_backend=poll\(\),
+                                       AC_MSG_ERROR(
+                                            [Can't enable poll IO support!])
+                               )
+                       ], [
+                               AC_MSG_ERROR([Can't enable poll IO support!])
+                       ])
+               fi
+       ],
+       [
+               AC_CHECK_FUNCS(poll, [
+                       AC_CHECK_HEADERS(poll.h, x_io_backend=poll\(\))
+               ])
+       ]
+)
+
+AC_ARG_WITH(devpoll,
+       AS_HELP_STRING([--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 $LDFLAGS"
+                       fi
+
+                               AC_CHECK_HEADERS(sys/devpoll.h,,AC_MSG_ERROR([required C header missing!]))
+               fi
+       ],
+       [
+               AC_CHECK_HEADERS(sys/devpoll.h, x_io_backend=/dev/poll)
+       ]
+)
+
+AC_ARG_WITH(epoll,
+       AS_HELP_STRING([--without-epoll],
+                      [disable epoll IO support (autodetected by default)]),
+       [       if test "$withval" != "no"; then
+                       if test "$withval" != "yes"; then
+                               CFLAGS="-I$withval/include $CFLAGS"
+                               CPPFLAGS="-I$withval/include $CPPFLAGS"
+                               LDFLAGS="-L$withval/lib $LDFLAGS"
+                       fi
+                       AC_CHECK_FUNCS(epoll_create, x_io_epoll=yes,
+                               AC_MSG_ERROR([Can't enable epoll IO support!])
+                       )
+               fi
+       ],
+       [
+               AC_CHECK_FUNCS(epoll_create, x_io_epoll=yes)
+       ]
+)
+
+AC_ARG_WITH(kqueue,
+       AS_HELP_STRING([--without-kqueue],
+                      [disable kqueue IO support (autodetected by default)]),
+       [       if test "$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 useable IO API activated/found!?])
 fi
 
+# use SSL?
+
+AC_ARG_WITH(openssl,
+       AS_HELP_STRING([--with-openssl],
+                      [enable SSL support using OpenSSL]),
+       [       if test "$withval" != "no"; then
+                       if test "$withval" != "yes"; then
+                               CFLAGS="-I$withval/include $CFLAGS"
+                               CPPFLAGS="-I$withval/include $CPPFLAGS"
+                               LDFLAGS="-L$withval/lib $LDFLAGS"
+                       fi
+                       AC_CHECK_LIB(crypto, BIO_s_mem)
+                       AC_CHECK_LIB(ssl, SSL_library_init)
+                       AC_CHECK_FUNCS(SSL_library_init, x_ssl_openssl=yes,
+                               AC_MSG_ERROR([Can't enable openssl])
+                       )
+               fi
+       ]
+)
+
+AC_ARG_WITH(gnutls,
+       AS_HELP_STRING([--with-gnutls],
+                      [enable SSL support using gnutls]),
+       [       if test "$withval" != "no"; then
+                       if test "$withval" != "yes"; then
+                               CFLAGS="-I$withval/include $CFLAGS"
+                               CPPFLAGS="-I$withval/include $CPPFLAGS"
+                               LDFLAGS="-L$withval/lib $LDFLAGS"
+                       fi
+                       AC_CHECK_LIB(gnutls, gnutls_global_init)
+                       AC_CHECK_FUNCS(gnutls_global_init, x_ssl_gnutls=yes,
+                               AC_MSG_ERROR([Can't enable gnutls])
+                       )
+               fi
+       ]
+)
+
+x_ssl_lib="no"
+if test "$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 "$withval" = "yes"; then
-                       AC_CHECK_LIB(wrap, tcpd_warn)
+       AS_HELP_STRING([--with-tcp-wrappers],
+                      [enable TCP wrappers support]),
+       [       if test "$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(USE_TCPWRAP, 1)
+                               AC_DEFINE(TCPWRAP, 1)
                                x_tcpwrap_on=yes
                                ],[
                                AC_MSG_RESULT(no)
@@ -206,102 +438,168 @@ AC_ARG_WITH(tcp-wrappers,
        ]
 )
 
-x_rendezvous_on=no
-AC_ARG_WITH(rendezvous,
-       [  --with-rendezvous       enable support for "Rendezvous"],
-       [       if test "$withval" = "yes"; then
-                       AC_CHECK_FUNCS(DNSServiceRegistrationCreate, x_rendezvous_on=yes,
-                               AC_MSG_ERROR([Can't enable Rendezvous!])
+# do IDENT requests using libident?
+
+x_identauth_on=no
+AC_ARG_WITH(ident,
+       AS_HELP_STRING([--with-ident],
+                      [enable "IDENT" ("AUTH") protocol support]),
+       [       if test "$withval" != "no"; then
+                       if test "$withval" != "yes"; then
+                               CFLAGS="-I$withval/include $CFLAGS"
+                               CPPFLAGS="-I$withval/include $CPPFLAGS"
+                               LDFLAGS="-L$withval/lib $LDFLAGS"
+                       fi
+                       AC_CHECK_LIB(ident, ident_id)
+                       AC_CHECK_FUNCS(ident_id, x_identauth_on=yes,
+                               AC_MSG_ERROR([Can't enable IDENT support!])
+                       )
+               fi
+       ]
+)
+if test "$x_identauth_on" = "yes"; then
+       AC_DEFINE(IDENTAUTH, 1)
+       AC_CHECK_HEADERS(ident.h,,AC_MSG_ERROR([required C header missing!]))
+fi
+
+# compile in PAM support?
+
+x_pam_on=no
+AC_ARG_WITH(pam,
+       AS_HELP_STRING([--with-pam],
+                      [enable user authentication using PAM]),
+       [       if test "$withval" != "no"; then
+                       if test "$withval" != "yes"; then
+                               CFLAGS="-I$withval/include $CFLAGS"
+                               CPPFLAGS="-I$withval/include $CPPFLAGS"
+                               LDFLAGS="-L$withval/lib $LDFLAGS"
+                       fi
+                       AC_CHECK_LIB(pam, pam_authenticate)
+                       AC_CHECK_FUNCS(pam_authenticate, x_pam_on=yes,
+                               AC_MSG_ERROR([Can't enable PAM support!])
                        )
                fi
        ]
 )
-if test "$x_rendezvous_on" = "yes"; then
-       AC_DEFINE(RENDEZVOUS, 1)
-       AC_CHECK_HEADERS(DNSServiceDiscovery/DNSServiceDiscovery.h mach/port.h)
+if test "$x_pam_on" = "yes"; then
+       AC_DEFINE(PAM, 1)
+       AC_CHECK_HEADERS(security/pam_appl.h,pam_ok=yes)
+       if test "$pam_ok" != "yes"; then
+               AC_CHECK_HEADERS(pam/pam_appl.h,pam_ok=yes,
+                       AC_MSG_ERROR([required C header missing!]))
+       fi
 fi
 
+# compile in IRC+ protocol support?
+
 x_ircplus_on=yes
 AC_ARG_ENABLE(ircplus,
-       [  --disable-ircplus       disable IRC+ protocol],
+       AS_HELP_STRING([--disable-ircplus],
+                      [disable IRC+ protocol]),
        if test "$enableval" = "no"; then x_ircplus_on=no; fi
 )
 if test "$x_ircplus_on" = "yes"; then
        AC_DEFINE(IRCPLUS, 1)
 fi
 
+# enable support for IPv6?
+x_ipv6_on=no
+AC_ARG_ENABLE(ipv6,
+       AS_HELP_STRING([--enable-ipv6],
+                      [enable IPv6 protocol support]),
+       if test "$enableval" = "yes"; then x_ipv6_on=yes; fi
+)
+if test "$x_ipv6_on" = "yes"; then
+       # getaddrinfo() and getnameinfo() are optional when not compiling
+       # with IPv6 support, but are required for IPv6 to work!
+       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)],
+       AS_HELP_STRING([--enable-sniffer],
+                      [enable IRC traffic sniffer (enables debug mode)]),
        if test "$enableval" = "yes"; then
                AC_DEFINE(SNIFFER, 1)
                x_sniffer_on=yes; x_debug_on=yes
        fi
 )
 
+# enable additional debugging code?
+
 AC_ARG_ENABLE(debug,
-       [  --enable-debug          show additional debug output],
+       AS_HELP_STRING([--enable-debug],
+                      [show additional debug output]),
        if test "$enableval" = "yes"; then x_debug_on=yes; fi
 )
 if test "$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!],
+       AS_HELP_STRING([--enable-strict-rfc],
+                      [strict RFC conformance -- may break clients!]),
        if test "$enableval" = "yes"; then
                AC_DEFINE(STRICT_RFC, 1)
                x_strict_rfc_on=yes
        fi
 )
 
-# -- Definitionen --
+# -- Definitions --
 
-AC_DEFINE_UNQUOTED(TARGET_CPU, "$target_cpu" )
-AC_DEFINE_UNQUOTED(TARGET_VENDOR, "$target_vendor" )
-AC_DEFINE_UNQUOTED(TARGET_OS, "$target_os" )
+AC_DEFINE_UNQUOTED(HOST_CPU, "$host_cpu" )
+AC_DEFINE_UNQUOTED(HOST_VENDOR, "$host_vendor" )
+AC_DEFINE_UNQUOTED(HOST_OS, "$host_os" )
 
-# -- Variablen --
-
-if test "$GCC" = "yes"; then
-       the_CFLAGS="-Wmissing-declarations -Wpointer-arith -Wstrict-prototypes"
-       $CC --version | grep 20020420 > /dev/null 2>&1
-       if test $? -eq 0; then
-               # Mac OS X (and Darwin?) ship with a slightly broken
-               # prerelease of GCC 3.1 which don't like -pedantic:
-               AC_MSG_RESULT([detected broken GNU C compiler, disabling "-pedantic"])
-               add_CFLAGS="-Wall -W -ansi $CFLAGS $CFLAGS_ADD"
-       else
-               add_CFLAGS="-Wall -W -ansi -pedantic $CFLAGS $CFLAGS_ADD"
-       fi
-else
-       the_CFLAGS="$CFLAGS"
-       add_CFLAGS="$CFLAGS_ADD"
-fi
+# Add additional CFLAGS, eventually specified on the command line, but after
+# running this configure script. Useful for "-Werror" for example.
+test -n "$CFLAGS_END" && CFLAGS="$CFLAGS $CFLAGS_END"
 
-CFLAGS="$the_CFLAGS $add_CFLAGS $add_DEFINES -DSYSCONFDIR='\"\$(sysconfdir)\"'"
+# -- Generate files --
 
-# -- Ausgabe der Dateien --
-
-AC_OUTPUT([ \
+AC_CONFIG_FILES([ \
        Makefile \
+       contrib/Anope/Makefile \
+       contrib/Debian/Makefile \
+       contrib/MacOSX/Makefile \
+       contrib/MacOSX/ngIRCd.pmdoc/Makefile \
+       contrib/MacOSX/ngIRCd.xcodeproj/Makefile \
+       contrib/Makefile \
        doc/Makefile \
-       MacOSX/Makefile \
-       MacOSX/ngircd.pbproj/Makefile \
+       doc/src/Makefile \
+       man/Makefile \
+       src/ipaddr/Makefile \
        src/Makefile \
-       src/portab/Makefile \
-       src/tool/Makefile \
        src/ngircd/Makefile \
+       src/portab/Makefile \
        src/testsuite/Makefile \
-       man/Makefile \
-       contrib/Makefile \
+       src/tool/Makefile \
 ])
 
+AC_OUTPUT
+
+type dpkg >/dev/null 2>&1
+if test $? -eq 0; then
+       # Generate debian/ link if the dpkg command exists
+       # (read: if we are running on a debian compatible system)
+       echo "creating Debian-specific links ..."
+       test -f debian/rules || ln -s contrib/Debian debian
+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]
@@ -309,13 +607,11 @@ B=`eval echo ${bindir}` ; B=`eval echo ${B}`
 S=`eval echo ${sbindir}` ; S=`eval echo ${S}`
 C=`eval echo ${sysconfdir}` ; C=`eval echo ${C}`
 M=`eval echo ${mandir}` ; M=`eval echo ${M}`
-D=`eval echo ${datadir}/doc/${PACKAGE}` ; D=`eval echo ${D}`
+D=`eval echo ${docdir}` ; D=`eval echo ${D}`
 
 echo "               Host: ${host}"
 echo "           Compiler: ${CC}"
-echo "     Compiler flags: ${the_CFLAGS}"
-test -n "$add_CFLAGS"  && echo "                     ${add_CFLAGS}"
-test -n "$add_DEFINES" && echo "                     ${add_DEFINES}"
+test -n "$CFLAGS"      && echo "     Compiler flags: ${CFLAGS}"
 test -n "$CPPFLAGS"    && echo " Preprocessor flags: ${CPPFLAGS}"
 test -n "$LDFLAGS"     && echo "       Linker flags: ${LDFLAGS}"
 test -n "$LIBS"                && echo "          Libraries: ${LIBS}"
@@ -328,8 +624,8 @@ 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" \
@@ -337,8 +633,8 @@ 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" \
@@ -346,21 +642,36 @@ 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 "      IDENT support: $ECHO_C"
+test "$x_identauth_on" = "yes" \
+       && echo $ECHO_N "yes   $ECHO_C" \
+       || echo $ECHO_N "no    $ECHO_C"
 echo $ECHO_N "      IRC+ protocol: $ECHO_C"
 test "$x_ircplus_on" = "yes" \
        && echo "yes" \
        || echo "no"
+
+echo $ECHO_N "      IPv6 protocol: $ECHO_C"
+test "$x_ipv6_on" = "yes" \
+       && 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 "        PAM support: $ECHO_C"
+test "$x_pam_on" = "yes" \
+       && echo $ECHO_N "yes   $ECHO_C" \
+       || echo $ECHO_N "no    $ECHO_C"
+echo $ECHO_N "        SSL support: $ECHO_C"
+echo "$x_ssl_lib"
+
 echo
 
 # -eof-