Use sideband also for challenge response.
[paraslash.git] / configure.ac
index a7bd3e1..c616b0a 100644 (file)
@@ -23,6 +23,14 @@ fi
 
 AC_C_BIGENDIAN()
 
+AC_PATH_PROG([gengetopt], [gengetopt])
+test -z "$gengetopt" && AC_MSG_ERROR(
+       [gengetopt is required to build this package])
+
+AC_PATH_PROG([help2man], [help2man])
+test -z "$help2man" && AC_MSG_ERROR(
+       [help2man is required to build this package])
+
 AC_PROG_CC
 AC_PROG_CPP
 AC_PROG_INSTALL
@@ -31,12 +39,12 @@ AC_REPLACE_FNMATCH
 AC_HEADER_DIRENT
 AC_HEADER_STDC
 AC_HEADER_SYS_WAIT
+AC_HEADER_STDBOOL
 AC_CHECK_HEADERS([arpa/inet.h ctype.h fcntl.h limits.h netdb.h netinet/in.h \
        stdlib.h string.h sys/socket.h sys/time.h sys/timeb.h sys/un.h \
        sys/ipc.h unistd.h utime.h stddef.h],
        [], [AC_MSG_ERROR([$ac_header not found])])
 
-
 # Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
 AC_C_INLINE
@@ -45,6 +53,7 @@ AC_TYPE_PID_T
 AC_TYPE_SIZE_T
 AC_HEADER_TIME
 AC_STRUCT_TM
+AC_TYPE_INT8_T
 AC_TYPE_INT16_T
 AC_TYPE_INT32_T
 AC_TYPE_INT64_T
@@ -75,7 +84,7 @@ AC_FUNC_LSTAT
 AC_CHECK_FUNCS([atexit dup2 memchr memmove memset \
        regcomp select strchr strdup strerror strstr strtol uname \
        fchdir gettimeofday localtime_r munmap strcasecmp strcspn \
-       strncasecmp strrchr strspn alarm mkdir rmdir], [],
+       strncasecmp strrchr strspn alarm mkdir inet_ntoa socket], [],
        [AC_MSG_ERROR([function not found, cannot live without it])])
 
 cmdline_dir="cmdline"
@@ -83,23 +92,22 @@ AC_SUBST(cmdline_dir)
 AC_DEFUN([add_cmdline],[$(for i in $@; do printf "${i}.cmdline "; done)])
 
 
-all_errlist_objs="server mp3_afh afh_common vss command net string signal time
-daemon stat crypt http_send close_on_fork ipc acl afh fade amp_filter
-dccp_send fd user_list chunk_queue afs aft mood score attribute blob ringbuffer
-playlist sha1 sched audiod grab_client filter_common wav_filter compress_filter
-http_recv dccp_recv recv_common write_common file_write audiod_command
-client_common recv stdout filter stdin audioc write client exec send_common ggo
-udp_recv udp_send color fec fecdec_filter prebuffer_filter mm
-server_command_list afs_command_list audiod_command_list bitstream imdct wma_afh
-wma_common wmadec_filter buffer_tree
-"
+all_errlist_objs="mp3_afh afh_common net string signal time daemon
+       stat afh fade amp_filter fd ringbuffer sched audiod
+       grab_client filter_common wav_filter compress_filter http_recv
+       dccp_recv recv_common write_common file_write audiod_command
+       client_common recv stdout filter stdin audioc write client
+       exec send_common ggo udp_recv color fec fecdec_filter
+       prebuffer_filter audiod_command_list bitstream imdct
+       wma_afh wma_common wmadec_filter buffer_tree crypt_common
+       gui gui_theme sideband"
 
-executables="server recv filter audioc write client afh audiod"
+executables="recv filter audioc write client afh audiod"
 
 recv_cmdline_objs="add_cmdline(recv http_recv dccp_recv udp_recv)"
 
 recv_errlist_objs="http_recv recv_common recv time string net dccp_recv
-       fd sched stdout ggo udp_recv fec buffer_tree"
+       fd sched stdout ggo udp_recv buffer_tree"
 recv_ldflags=""
 
 filter_cmdline_objs="add_cmdline(filter compress_filter amp_filter prebuffer_filter)"
@@ -114,10 +122,10 @@ audioc_errlist_objs="audioc string net fd"
 audioc_ldflags=""
 
 audiod_cmdline_objs="add_cmdline(audiod compress_filter http_recv dccp_recv file_write client amp_filter udp_recv prebuffer_filter)"
-audiod_errlist_objs="audiod signal string daemon stat net
+audiod_errlist_objs="audiod signal string daemon stat net crypt_common sideband
        time grab_client filter_common wav_filter compress_filter amp_filter http_recv dccp_recv
-       recv_common fd sched write_common file_write audiod_command crypt fecdec_filter
-       client_common ggo udp_recv color fec prebuffer_filter sha1 audiod_command_list
+       recv_common fd sched write_common file_write audiod_command fecdec_filter
+       client_common ggo udp_recv color fec prebuffer_filter audiod_command_list
        bitstream imdct wma_common wmadec_filter buffer_tree"
 audiod_ldflags="-lm"
 audiod_audio_formats="wma"
@@ -126,15 +134,6 @@ afh_cmdline_objs="add_cmdline(afh)"
 afh_errlist_objs="afh string fd mp3_afh afh_common time wma_afh wma_common"
 afh_ldflags=""
 
-server_cmdline_objs="add_cmdline(server)"
-server_errlist_objs="server afh_common mp3_afh vss command net string signal
-       time daemon crypt http_send close_on_fork mm
-       ipc dccp_send fd user_list chunk_queue afs aft mood score attribute
-       blob playlist sha1 sched acl send_common udp_send color fec
-       server_command_list afs_command_list wma_afh wma_common"
-server_ldflags="-losl"
-server_audio_formats="mp3 wma"
-
 write_cmdline_objs="add_cmdline(write file_write)"
 write_errlist_objs="write write_common file_write time fd string sched stdin
        buffer_tree ggo"
@@ -143,14 +142,13 @@ writers=" file"
 default_writer="FILE_WRITE"
 
 client_cmdline_objs="add_cmdline(client)"
-client_errlist_objs="client net string crypt fd sched stdin stdout time
-       client_common sha1 buffer_tree"
+client_errlist_objs="client net string fd sched stdin stdout time sideband
+       client_common buffer_tree crypt_common"
 client_ldflags=""
 
 gui_cmdline_objs="add_cmdline(gui)"
-gui_errlist_objs="exec signal string stat ringbuffer fd"
-gui_other_objs="gui gui_theme"
-gui_objs="$gui_cmdline_objs $gui_errlist_objs $gui_other_objs"
+gui_errlist_objs="exec signal string stat ringbuffer fd gui gui_theme"
+gui_objs="$gui_cmdline_objs $gui_errlist_objs"
 
 fade_cmdline_objs="add_cmdline(fade)"
 fade_errlist_objs="fade exec string fd"
@@ -257,57 +255,152 @@ fi
 AC_CHECK_HEADER(osl.h, [], have_osl=no)
 AC_CHECK_LIB([osl], [osl_open_table], [], have_osl=no)
 if test "$have_osl" = "no"; then
-       AC_MSG_ERROR([libosl not found, download it at
+       AC_MSG_WARN([libosl not found, can not build para_server.
+Download libosl at
        http://systemlinux.org/~maan/osl
 or execute
        git clone git://git.tuebingen.mpg.de/osl
        ])
+else
+       extras="$extras server"
+       executables="$executables server"
+       server_cmdline_objs="add_cmdline(server)"
+       server_errlist_objs="server afh_common mp3_afh vss command net
+               string signal time daemon http_send close_on_fork mm
+               crypt_common ipc dccp_send fd user_list chunk_queue
+               afs aft mood score attribute blob playlist sched acl
+               send_common udp_send color fec server_command_list
+               afs_command_list wma_afh wma_common sideband"
+
+       all_errlist_objs="$all_errlist_objs server vss command
+               http_send close_on_fork mm ipc dccp_send user_list
+               chunk_queue afs aft mood score attribute blob playlist
+               acl udp_send server_command_list afs_command_list"
+
+       server_ldflags=""
+       server_audio_formats="mp3 wma"
+       AC_SUBST(osl_cppflags)
+       server_ldflags="$server_ldflags $osl_libs -losl"
 fi
-AC_SUBST(osl_cppflags)
-server_ldflags="$server_ldflags -L$with_osl_libs"
 CPPFLAGS="$OLD_CPPFLAGS"
 LDFLAGS="$OLD_LDFLAGS"
 LIBS="$OLD_LIBS"
-########################################################################### ssl
-dnl @synopsis CHECK_SSL
-dnl
-dnl based on the follwing macro from the autoconf archive
-dnl
-dnl @category InstalledPackages
-dnl @author Mark Ethan Trostler <trostler@juniper.net>
-dnl @version 2003-01-28
-dnl @license AllPermissive
-
-AC_DEFUN([CHECK_SSL],
-[
-       for ssldir in $1 /usr/local/ssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /usr; do
-               AC_MSG_CHECKING(for openssl in $ssldir)
-               if test -f "$ssldir/include/openssl/ssl.h"; then
-                       found_ssl="yes"
-                       AC_MSG_RESULT(yes)
-                       SSL_CFLAGS="-I$ssldir/include"
-                       SSL_CPPFLAGS="-I$ssldir/include"
-                       break
+########################################################################### crypto
+AC_ARG_ENABLE(cryptolib, [AS_HELP_STRING(--enable-cryptolib=lib, [
+       Force using crypto library "lib". This package requires either
+       openssl or libgcrypt being installed. Possible values for "lib"
+       are thus "openssl" and "gcrypt". If this option is not given,
+       openssl is tried first. If openssl was not found, gcrypt is
+       tried next.])])
+
+case "$enable_cryptolib" in
+       "openssl") check_openssl="yes"; check_gcrypt="no";;
+       "gcrypt") check_openssl="no"; check_gcrypt="yes";;
+       "") check_openssl="yes"; check_gcrypt="yes";;
+       *) AC_MSG_ERROR([invalid value "$enable_cryptolib" for --enable-cryptolib]);;
+esac
+###################################################################### openssl
+if test "$check_openssl" = "yes"; then
+       OLD_CPPFLAGS="$CPPFLAGS"
+       OLD_LD_FLAGS="$LDFLAGS"
+       OLD_LIBS="$LIBS"
+       have_openssl="yes"
+       AC_ARG_WITH(openssl_headers, [AC_HELP_STRING(--with-openssl-headers=dir,
+               [look for openssl headers also in dir])])
+       if test -n "$with_openssl_headers"; then
+               openssl_cppflags="-I$with_openssl_headers"
+               CPPFLAGS="$CPPFLAGS $openssl_cppflags"
+       fi
+       AC_ARG_WITH(openssl_libs, [AC_HELP_STRING(--with-openssl-libs=dir,
+               [look for openssl libraries also in dir])])
+       if test -n "$with_openssl_libs"; then
+               openssl_libs="-L$with_openssl_libs"
+               LDFLAGS="$LDFLAGS $openssl_libs"
+       fi
+       AC_CHECK_HEADER(openssl/ssl.h, [], [have_openssl="no"])
+       AC_CHECK_LIB([crypto], [RAND_bytes], [], [have_openssl="no"])
+       if test "$have_openssl" = "no" -a -z "$with_openssl_headers$with_openssl_libs"; then
+               # try harder: openssl is sometimes installed in /usr/local/ssl
+               openssl_cppflags="-I/usr/local/ssl/include"
+               CPPFLAGS="$CPPFLAGS $openssl_cppflags"
+               openssl_libs="-L/usr/local/ssl/lib"
+               LDFLAGS="$LDFLAGS $openssl_libs"
+               # clear cache
+               unset ac_cv_header_openssl_ssl_h 2> /dev/null
+               unset ac_cv_lib_crypto_RAND_bytes 2> /dev/null
+               AC_CHECK_HEADER(openssl/ssl.h, [have_openssl="yes"], [])
+               if test "$have_openssl" = "yes"; then
+                       AC_CHECK_LIB([crypto], [RAND_bytes], [], [have_openssl="no"])
                fi
-               AC_MSG_RESULT(no)
-       done
-       if test x_$found_ssl != x_yes; then
-               AC_MSG_ERROR(Cannot find ssl libraries)
+       fi
+       if test "$have_openssl" = "yes"; then
+               AC_DEFINE(HAVE_OPENSSL, 1, [define to 1 to turn on openssl support])
+               AC_SUBST(openssl_cppflags)
+               openssl_libs="$openssl_libs -lssl -lcrypto"
+               server_ldflags="$server_ldflags $openssl_libs"
+               client_ldflags="$client_ldflags $openssl_libs"
+               audiod_ldflags="$audiod_ldflags $openssl_libs"
+
+               all_errlist_objs="$all_errlist_objs crypt"
+               server_errlist_objs="$server_errlist_objs crypt"
+               client_errlist_objs="$client_errlist_objs crypt"
+               audiod_errlist_objs="$audiod_errlist_objs crypt"
+
+               check_gcrypt="no"
        else
-               SSL_LIBS="-lssl -lcrypto";
-               SSL_LDFLAGS="-L$ssldir/lib";
+               AC_MSG_WARN([openssl libraries not found])
        fi
-       AC_SUBST(SSL_CPPFLAGS)
-])dnl
-
-AC_ARG_ENABLE(ssldir, [AS_HELP_STRING(--enable-ssldir=path,
-       [Search for openssl also in path.])])
-if test "$enable_ssldir" = "yes"; then enable_ssldir=""; fi
-CHECK_SSL($enable_ssldir)
-server_ldflags="$server_ldflags $SSL_LDFLAGS $SSL_LIBS"
-client_ldflags="$client_ldflags $SSL_LDFLAGS $SSL_LIBS"
-audiod_ldflags="$audiod_ldflags $SSL_LDFLAGS $SSL_LIBS"
-
+       CPPFLAGS="$OLD_CPPFLAGS"
+       LDFLAGS="$OLD_LDFLAGS"
+       LIBS="$OLD_LIBS"
+else
+       have_openssl="no"
+fi
+########################################################################### gcrypt
+if test "$check_gcrypt" = "yes"; then
+       OLD_CPPFLAGS="$CPPFLAGS"
+       OLD_LD_FLAGS="$LDFLAGS"
+       OLD_LIBS="$LIBS"
+       have_gcrypt="yes"
+       AC_ARG_WITH(gcrypt_headers, [AC_HELP_STRING(--with-gcrypt-headers=dir,
+               [look for gcrypt headers also in dir])])
+       if test -n "$with_gcrypt_headers"; then
+               gcrypt_cppflags="-I$with_gcrypt_headers"
+               CPPFLAGS="$CPPFLAGS $gcrypt_cppflags"
+       fi
+       AC_ARG_WITH(gcrypt_libs, [AC_HELP_STRING(--with-gcrypt-libs=dir,
+               [look for libgcrypt also in dir])])
+       if test -n "$with_gcrypt_libs"; then
+               gcrypt_libs="-L$with_gcrypt_libs"
+               LDFLAGS="$LDFLAGS $gcrypt_libs"
+       fi
+       AC_CHECK_HEADER(gcrypt.h, [], [have_gcrypt="no"])
+       AC_CHECK_LIB([gcrypt], [gcry_randomize], [], [have_gcrypt="no"])
+       if test "$have_gcrypt" = "yes"; then
+               AC_DEFINE(HAVE_GCRYPT, 1, [define to 1 to turn on gcrypt support])
+               AC_SUBST(gcrypt_cppflags)
+               gcrypt_libs="$gcrypt_libs -lgcrypt"
+               server_ldflags="$server_ldflags $gcrypt_libs"
+               client_ldflags="$client_ldflags $gcrypt_libs"
+               audiod_ldflags="$audiod_ldflags $gcrypt_libs"
+
+               all_errlist_objs="$all_errlist_objs gcrypt"
+               server_errlist_objs="$server_errlist_objs gcrypt"
+               client_errlist_objs="$client_errlist_objs gcrypt"
+               audiod_errlist_objs="$audiod_errlist_objs gcrypt"
+       else
+               AC_MSG_WARN([gcrypt library not found])
+       fi
+       CPPFLAGS="$OLD_CPPFLAGS"
+       LDFLAGS="$OLD_LDFLAGS"
+       LIBS="$OLD_LIBS"
+else
+       have_gcrypt="no"
+fi
+###########################################################################
+if test "$have_openssl" = "no" -a "$have_gcrypt" = "no"; then
+       AC_MSG_ERROR([neither openssl nor gcrypt usable])
+fi
 ########################################################################### libsocket
 AC_CHECK_LIB([c], [socket],
        [socket_lib=],
@@ -348,31 +441,31 @@ if test ${have_ucred} = yes; then
 fi
 
 ########################################################################### curses
-have_ncurses="yes"
+have_curses="yes"
 OLD_CPPFLAGS="$CPPFLAGS"
 OLD_LD_FLAGS="$LDFLAGS"
 OLD_LIBS="$LIBS"
-AC_ARG_WITH(ncurses_headers, [AC_HELP_STRING(--with-ncurses-headers=dir,
-       [look for ncurses.h also in dir])])
-if test -n "$with_ncurses_headers"; then
-       ncurses_cppflags="-I$with_ncurses_headers"
-       CPPFLAGS="$CPPFLAGS $ncurses_cppflags"
-fi
-AC_ARG_WITH(ncurses_libs, [AC_HELP_STRING(--with-ncurses-libs=dir,
-       [look for libncurses also in dir])])
-if test -n "$with_ncurses_libs"; then
-       ncurses_libs="-L$with_ncurses_libs"
-       LDFLAGS="$LDFLAGS $ncurses_libs"
+AC_ARG_WITH(curses_headers, [AC_HELP_STRING(--with-curses-headers=dir,
+       [look for curses.h also in dir])])
+if test -n "$with_curses_headers"; then
+       curses_cppflags="-I$with_curses_headers"
+       CPPFLAGS="$CPPFLAGS $curses_cppflags"
+fi
+AC_ARG_WITH(curses_libs, [AC_HELP_STRING(--with-curses-libs=dir,
+       [look for libcurses also in dir])])
+if test -n "$with_curses_libs"; then
+       curses_libs="-L$with_curses_libs"
+       LDFLAGS="$LDFLAGS $curses_libs"
 fi
 AC_CHECK_HEADER(curses.h, [], [
-       have_ncurses="no"
+       have_curses="no"
 ])
-AC_CHECK_LIB([ncurses], [initscr], [], [
-       have_ncurses="no"
+AC_CHECK_LIB([curses], [initscr], [], [
+       have_curses="no"
 ])
-if test "$have_ncurses" = "yes"; then
-       AC_SUBST(ncurses_cppflags)
-       AC_DEFINE(HAVE_NCURSES, 1, [define to 1 to turn on ncurses support])
+if test "$have_curses" = "yes"; then
+       AC_SUBST(curses_cppflags)
+       AC_DEFINE(HAVE_NCURSES, 1, [define to 1 to turn on curses support])
        extras="$extras gui"
        executables="$executables gui"
 else
@@ -412,11 +505,17 @@ if test ${have_core_audio} = yes; then
        f="$f1 $f2 $f3 $f4"
 
        all_errlist_objs="$all_errlist_objs osx_write"
-       audiod_errlist_objs="$audiod_errlist_objs osx_write"
+       # ipc is linked into para_server server and into the osx writer. If osl
+       # was not found, para_server will not be built and ipc has not yet been
+       # added to the list of all objects, so we must add it here.
+       if test "$have_osl" = "no"; then
+               all_errlist_objs="$all_errlist_objs ipc"
+       fi
+       audiod_errlist_objs="$audiod_errlist_objs osx_write ipc"
        audiod_cmdline_objs="$audiod_cmdline_objs osx_write.cmdline"
        audiod_ldflags="$audiod_ldflags $f"
 
-       write_errlist_objs="$write_errlist_objs osx_write"
+       write_errlist_objs="$write_errlist_objs osx_write ipc"
        write_cmdline_objs="$write_cmdline_objs osx_write.cmdline"
        write_ldflags="$write_ldflags $f"
        writers="$writers osx"
@@ -425,86 +524,119 @@ if test ${have_core_audio} = yes; then
 fi
 ########################################################### ogg/vorbis/speex
 have_ogg="yes"
-have_vorbis="yes"
-have_speex="yes"
 OLD_CPPFLAGS="$CPPFLAGS"
 OLD_LD_FLAGS="$LDFLAGS"
 OLD_LIBS="$LIBS"
-AC_ARG_WITH(oggvorbis_headers, [AC_HELP_STRING(--with-oggvorbis-headers=dir,
-       [look for ogg/vorbis/speex headers also in dir])])
-if test -n "$with_oggvorbis_headers"; then
-       ogg_cppflags="-I$with_oggvorbis_headers"
+AC_ARG_WITH(ogg_headers, [AC_HELP_STRING(--with-ogg-headers=dir,
+       [look for ogg headers also in dir])])
+AC_ARG_WITH(ogg_libs, [AC_HELP_STRING(--with-ogg-libs=dir,
+       [look for ogg libs also in dir])])
+AC_ARG_WITH(vorbis_headers, [AC_HELP_STRING(--with-vorbis-headers=dir,
+       [look for vorbis headers also in dir])])
+AC_ARG_WITH(vorbis_libs, [AC_HELP_STRING(--with-vorbis-libs=dir,
+       [look for vorbis libs also in dir])])
+AC_ARG_WITH(speex_headers, [AC_HELP_STRING(--with-speex-headers=dir,
+       [look for speex headers also in dir])])
+AC_ARG_WITH(speex_libs, [AC_HELP_STRING(--with-speex-libs=dir,
+       [look for speex libs also in dir])])
+
+if test -n "$with_ogg_headers"; then
+       ogg_cppflags="-I$with_ogg_headers"
        CPPFLAGS="$CPPFLAGS $ogg_cppflags"
 fi
-AC_ARG_WITH(oggvorbis_libs, [AC_HELP_STRING(--with-oggvorbis-libs=dir,
-       [look for ogg/vorbis/speex libs also in dir])])
-if test -n "$with_oggvorbis_libs"; then
-       ogg_libs="-L$with_oggvorbis_libs"
+if test -n "$with_ogg_libs"; then
+       ogg_libs="-L$with_ogg_libs"
        LDFLAGS="$LDFLAGS $ogg_libs"
 fi
-
-AC_CHECK_LIB([ogg], [ogg_stream_init], [], [ have_ogg="no" ])
-AC_CHECK_LIB([vorbis], [vorbis_info_init], [], [ have_vorbis="no" ])
-AC_CHECK_LIB([speex], [speex_decoder_init], [], [ have_speex="no" ])
 AC_CHECK_HEADERS([ogg/ogg.h], [], [ have_ogg="no"; ])
-AC_CHECK_HEADERS([vorbis/codec.h], [], [ have_vorbis="no" ])
-AC_CHECK_HEADERS([speex/speex.h], [], [ have_speex="no" ])
+AC_CHECK_LIB([ogg], [ogg_stream_init], [], [ have_ogg="no" ])
+
+have_vorbis="yes"
+have_speex="yes"
+if test "$have_ogg" = "yes"; then
+       # vorbis
+       if test -n "$with_vorbis_headers"; then
+               vorbis_cppflags="-I$with_vorbis_headers"
+               CPPFLAGS="$CPPFLAGS $vorbis_cppflags"
+       fi
+       if test -n "$with_vorbis_libs"; then
+               vorbis_libs="-L$with_vorbis_libs"
+               LDFLAGS="$LDFLAGS $vorbis_libs"
+       fi
+       AC_CHECK_HEADERS([vorbis/codec.h], [], [ have_vorbis="no" ])
+       AC_CHECK_LIB([vorbis], [vorbis_info_init], [], [ have_vorbis="no" ])
+
+       # speex
+       if test -n "$with_speex_headers"; then
+               speex_cppflags="-I$with_speex_headers"
+               CPPFLAGS="$CPPFLAGS $speex_cppflags"
+       fi
+       if test -n "$with_speex_libs"; then
+               speex_libs="-L$with_speex_libs"
+               LDFLAGS="$LDFLAGS $speex_libs"
+       fi
+       AC_CHECK_LIB([speex], [speex_decoder_init], [], [ have_speex="no" ])
+       AC_CHECK_HEADERS([speex/speex.h], [], [ have_speex="no" ])
+else
+       AC_MSG_WARN([vorbis/speex depend on libogg, which was not detected])
+       have_vorbis="no"
+       have_speex="no"
+fi
+
 msg="support in para_server/para_filter/para_afh"
-if test "$have_ogg" = "yes" && { test "$have_vorbis" = "yes" || test "$have_speex" = "yes"; }; then
+if test "$have_vorbis" = "yes" || test "$have_speex" = "yes"; then
        AC_SUBST(ogg_cppflags)
        ogg_libs="$ogg_libs -logg"
        if test "$OSTYPE" = "Darwin"; then
-               ogg_libs="-Wl,-bind_at_load $ogg_libs $ogg_libs"
+               ogg_libs="-Wl,-bind_at_load $ogg_libs"
        fi
        server_ldflags="$server_ldflags $ogg_libs"
        filter_ldflags="$filter_ldflags $ogg_libs"
        audiod_ldflags="$audiod_ldflags $ogg_libs"
-       all_errlist_objs="$all_errlist_objs ogg_afh_common"
        afh_ldflags="$afh_ldflags $ogg_libs"
+       all_errlist_objs="$all_errlist_objs ogg_afh_common"
        afh_errlist_objs="$afh_errlist_objs ogg_afh_common"
        server_errlist_objs="$server_errlist_objs ogg_afh_common"
-       if test "$have_vorbis" = "yes"; then
-               all_errlist_objs="$all_errlist_objs oggdec_filter ogg_afh"
-               AC_DEFINE(HAVE_OGGVORBIS, 1, define to 1 to turn on ogg/vorbis support)
-               filters="$filters oggdec"
-               vorbis_libs="-lvorbis -lvorbisfile"
-               server_ldflags="$server_ldflags $vorbis_libs"
-               filter_ldflags="$filter_ldflags $vorbis_libs"
-               audiod_ldflags="$audiod_ldflags $vorbis_libs"
-               afh_ldflags="$afh_ldflags $vorbis_libs"
-
-               server_errlist_objs="$server_errlist_objs ogg_afh"
-               filter_errlist_objs="$filter_errlist_objs oggdec_filter"
-               audiod_errlist_objs="$audiod_errlist_objs oggdec_filter"
-               afh_errlist_objs="$afh_errlist_objs ogg_afh"
-
-               audiod_audio_formats="$audiod_audio_formats ogg"
-               server_audio_formats="$server_audio_formats ogg"
-       else
-               AC_MSG_WARN([no ogg/vorbis $msg])
-       fi
-       if test "$have_speex" = "yes"; then
-               all_errlist_objs="$all_errlist_objs spxdec_filter spx_afh spx_common"
-               AC_DEFINE(HAVE_SPEEX, 1, define to 1 to turn on ogg/speex support)
-               filters="$filters spxdec"
-               speex_libs="-lspeex"
-               server_ldflags="$server_ldflags $speex_libs"
-               filter_ldflags="$filter_ldflags $speex_libs"
-               audiod_ldflags="$audiod_ldflags $speex_libs"
-               afh_ldflags="$afh_ldflags $speex_libs"
-
-               server_errlist_objs="$server_errlist_objs spx_afh spx_common"
-               filter_errlist_objs="$filter_errlist_objs spxdec_filter spx_common"
-               audiod_errlist_objs="$audiod_errlist_objs spxdec_filter spx_common"
-               afh_errlist_objs="$afh_errlist_objs spx_afh spx_common"
-
-               audiod_audio_formats="$audiod_audio_formats spx"
-               server_audio_formats="$server_audio_formats spx"
-       else
-               AC_MSG_WARN([no ogg/speex $msg])
-       fi
+fi
+if test "$have_vorbis" = "yes"; then
+       all_errlist_objs="$all_errlist_objs oggdec_filter ogg_afh"
+       AC_DEFINE(HAVE_OGGVORBIS, 1, define to 1 to turn on ogg/vorbis support)
+       filters="$filters oggdec"
+       vorbis_libs="-lvorbis -lvorbisfile"
+       server_ldflags="$server_ldflags $vorbis_libs"
+       filter_ldflags="$filter_ldflags $vorbis_libs"
+       audiod_ldflags="$audiod_ldflags $vorbis_libs"
+       afh_ldflags="$afh_ldflags $vorbis_libs"
+
+       server_errlist_objs="$server_errlist_objs ogg_afh"
+       filter_errlist_objs="$filter_errlist_objs oggdec_filter"
+       audiod_errlist_objs="$audiod_errlist_objs oggdec_filter"
+       afh_errlist_objs="$afh_errlist_objs ogg_afh"
+
+       audiod_audio_formats="$audiod_audio_formats ogg"
+       server_audio_formats="$server_audio_formats ogg"
 else
-       AC_MSG_WARN([no ogg/vorbis ogg/speex $msg])
+       AC_MSG_WARN([no ogg/vorbis $msg])
+fi
+if test "$have_speex" = "yes"; then
+       all_errlist_objs="$all_errlist_objs spxdec_filter spx_afh spx_common"
+       AC_DEFINE(HAVE_SPEEX, 1, define to 1 to turn on ogg/speex support)
+       filters="$filters spxdec"
+       speex_libs="-lspeex"
+       server_ldflags="$server_ldflags $speex_libs"
+       filter_ldflags="$filter_ldflags $speex_libs"
+       audiod_ldflags="$audiod_ldflags $speex_libs"
+       afh_ldflags="$afh_ldflags $speex_libs"
+
+       server_errlist_objs="$server_errlist_objs spx_afh spx_common"
+       filter_errlist_objs="$filter_errlist_objs spxdec_filter spx_common"
+       audiod_errlist_objs="$audiod_errlist_objs spxdec_filter spx_common"
+       afh_errlist_objs="$afh_errlist_objs spx_afh spx_common"
+
+       audiod_audio_formats="$audiod_audio_formats spx"
+       server_audio_formats="$server_audio_formats spx"
+else
+       AC_MSG_WARN([no ogg/speex $msg])
 fi
 CPPFLAGS="$OLD_CPPFLAGS"
 LDFLAGS="$OLD_LDFLAGS"
@@ -592,20 +724,84 @@ CPPFLAGS="$OLD_CPPFLAGS"
 LDFLAGS="$OLD_LDFLAGS"
 LIBS="$OLD_LIBS"
 ###################################################################### libid3tag
+OLD_CPPFLAGS="$CPPFLAGS"
+OLD_LD_FLAGS="$LDFLAGS"
+OLD_LIBS="$LIBS"
+
+have_libid3tag="yes"
+AC_ARG_WITH(id3tag_headers, [AC_HELP_STRING(--with-id3tag-headers=dir,
+       [look for id3tag header files also in dir])])
+if test -n "$with_id3tag_headers"; then
+       id3tag_cppflags="-I$with_id3tag_headers"
+       CPPFLAGS="$CPPFLAGS $id3tag_cppflags"
+fi
+AC_ARG_WITH(id3tag_libs, [AC_HELP_STRING(--with-id3tag-libs=dir,
+       [look for id3tag libs also in dir])])
+if test -n "$with_id3tag_libs"; then
+       id3tag_libs="-L$with_id3tag_libs"
+       LDFLAGS="$LDFLAGS $id3tag_libs"
+fi
+
 AC_MSG_CHECKING(for libid3tag)
 AC_TRY_LINK([
        #include <id3tag.h>
 ],[
        struct id3_tag t = {.flags = 0};
-],[have_libid3tag=yes],[have_libid3tag=no])
+],[], [have_libid3tag=no])
 AC_MSG_RESULT($have_libid3tag)
+
 if test ${have_libid3tag} = yes; then
        AC_DEFINE(HAVE_LIBID3TAG, 1, define to 1 you have libid3tag)
-       server_ldflags="$server_ldflags -lid3tag"
-       afh_ldflags="$afh_ldflags -lid3tag"
+       server_ldflags="$server_ldflags $id3tag_libs -lid3tag -lz"
+       afh_ldflags="$afh_ldflags $id3tag_libs -lid3tag -lz"
+       AC_SUBST(id3tag_cppflags)
 else
        AC_MSG_WARN([no support for id3v2 tags])
 fi
+CPPFLAGS="$OLD_CPPFLAGS"
+LDFLAGS="$OLD_LDFLAGS"
+LIBS="$OLD_LIBS"
+########################################################################### flac
+OLD_CPPFLAGS="$CPPFLAGS"
+OLD_LD_FLAGS="$LDFLAGS"
+OLD_LIBS="$LIBS"
+
+have_flac="yes"
+AC_ARG_WITH(flac_headers, [AC_HELP_STRING(--with-flac-headers=dir,
+       [look for flac headers also in dir])])
+if test -n "$with_flac_headers"; then
+       flac_cppflags="-I$with_flac_headers"
+       CPPFLAGS="$CPPFLAGS $flac_cppflags"
+fi
+AC_ARG_WITH(flac_libs, [AC_HELP_STRING(--with-flac-libs=dir,
+       [look for flac libs also in dir])])
+if test -n "$with_flac_libs"; then
+       flac_libs="-L$with_flac_libs"
+       LDFLAGS="$LDFLAGS $flac_libs"
+fi
+AC_CHECK_HEADER(FLAC/stream_decoder.h, [], have_flac=no)
+AC_CHECK_LIB([FLAC], [FLAC__stream_decoder_init_file], [], have_flac=no, -logg -lm)
+if test "$have_flac" = "yes"; then
+       AC_DEFINE(HAVE_FLAC, 1, define to 1 if you want to build the flacdec filter)
+       all_errlist_objs="$all_errlist_objs flacdec_filter flac_afh"
+       filter_errlist_objs="$filter_errlist_objs flacdec_filter"
+       audiod_errlist_objs="$audiod_errlist_objs flacdec_filter"
+       afh_errlist_objs="$afh_errlist_objs flac_afh"
+       server_errlist_objs="$server_errlist_objs flac_afh"
+       filter_ldflags="$filter_ldflags $flac_libs -lFLAC"
+       audiod_ldflags="$audiod_ldflags $flac_libs -lFLAC"
+       server_ldflags="$server_ldflags $flac_libs -lFLAC"
+       afh_ldflags="$afh_ldflags $flac_libs -lFLAC"
+       filters="$filters flacdec"
+       server_audio_formats="$server_audio_formats flac"
+       audiod_audio_formats="$audiod_audio_formats flac"
+       AC_SUBST(flac_cppflags)
+else
+       AC_MSG_WARN([no flac support in para_audiod/para_filter])
+fi
+CPPFLAGS="$OLD_CPPFLAGS"
+LDFLAGS="$OLD_LDFLAGS"
+LIBS="$OLD_LIBS"
 ########################################################################### oss
 OLD_CPPFLAGS="$CPPFLAGS"
 OLD_LD_FLAGS="$LDFLAGS"
@@ -682,6 +878,129 @@ fi
 CPPFLAGS="$OLD_CPPFLAGS"
 LDFLAGS="$OLD_LDFLAGS"
 LIBS="$OLD_LIBS"
+########################################################################### libao
+OLD_CPPFLAGS="$CPPFLAGS"
+OLD_LD_FLAGS="$LDFLAGS"
+OLD_LIBS="$LIBS"
+
+have_ao="yes"
+AC_ARG_WITH(ao_headers, [AC_HELP_STRING(--with-ao-headers=dir,
+       [look for ao/ao.h also in dir])])
+if test -n "$with_ao_headers"; then
+       ao_cppflags="-I$with_ao_headers"
+       CPPFLAGS="$CPPFLAGS $ao_cppflags"
+fi
+AC_ARG_WITH(ao_libs, [AC_HELP_STRING(--with-ao-libs=dir,
+       [look for libao also in dir])])
+if test -n "$with_ao_libs"; then
+       ao_libs="-L$with_ao_libs"
+       LDFLAGS="$LDFLAGS $ao_libs"
+fi
+msg="no libao support for para_audiod/para_write"
+AC_CHECK_HEADERS([ao/ao.h], [
+       ], [
+       have_ao="no"
+       AC_MSG_WARN([ao.h not found, $msg])
+])
+if test "$have_ao" = "yes"; then
+       AC_CHECK_LIB([ao], [ao_initialize], [], [
+               have_ao="no"
+               AC_MSG_WARN([ao lib not found or not working, $msg])
+       ])
+fi
+if test "$have_ao" = "yes"; then
+       AC_CHECK_HEADERS([pthread.h], [
+               ], [
+               have_ao="no"
+               AC_MSG_WARN([pthread.h not found, $msg])
+       ])
+fi
+if test "$have_ao" = "yes"; then
+       AC_CHECK_LIB([pthread], [pthread_create], [], [
+               have_ao="no"
+               AC_MSG_WARN([pthread lib not found or not working, $msg])
+       ])
+fi
+if test "$have_ao" = "yes"; then
+       all_errlist_objs="$all_errlist_objs ao_write"
+       audiod_errlist_objs="$audiod_errlist_objs ao_write"
+       audiod_cmdline_objs="$audiod_cmdline_objs add_cmdline(ao_write)"
+       audiod_ldflags="$audiod_ldflags -lao -lpthread"
+
+       write_errlist_objs="$write_errlist_objs ao_write"
+       write_cmdline_objs="$write_cmdline_objs add_cmdline(ao_write)"
+       write_ldflags="$write_ldflags $ao_libs -lao -lpthread"
+       writers="$writers ao"
+       AC_SUBST(ao_cppflags)
+fi
+
+CPPFLAGS="$OLD_CPPFLAGS"
+LDFLAGS="$OLD_LDFLAGS"
+LIBS="$OLD_LIBS"
+############################################################# readline
+OLD_CPPFLAGS="$CPPFLAGS"
+OLD_LD_FLAGS="$LDFLAGS"
+OLD_LIBS="$LIBS"
+
+have_readline="yes"
+AC_ARG_WITH(readline_headers, [AC_HELP_STRING(--with-readline-headers=dir,
+       [look for libreadline header files also in dir])])
+if test -n "$with_readline_headers"; then
+       readline_cppflags="-I$with_readline_headers"
+       CPPFLAGS="$CPPFLAGS $readline_cppflags"
+fi
+
+AC_ARG_WITH(readline_libs, [AC_HELP_STRING(--with-readline-libs=dir,
+       [look for readline library also in dir])])
+if test -n "$with_readline_libs"; then
+       readline_libs="-L$with_readline_libs"
+       LDFLAGS="$LDFLAGS $readline_libs"
+fi
+msg="no interactive cli support"
+AC_CHECK_HEADERS([readline/readline.h], [
+       ], [
+       have_readline="no"
+       AC_MSG_WARN([readline/readline.h not found, $msg])
+])
+if test "$have_readline" = "yes"; then
+       readline_libs="$readline_libs -lreadline"
+       AC_SEARCH_LIBS([rl_replace_line], [readline], [], [have_readline="no"])
+       if test "$have_readline" = "no"; then # try with -lcurses
+                # clear cache
+               AC_MSG_NOTICE([trying again with -lcurses])
+                unset ac_cv_search_rl_replace_line 2> /dev/null
+               AC_SEARCH_LIBS([rl_replace_line], [readline], [
+                       have_readline=yes
+                       readline_libs="$readline_libs -lcurses"
+               ], [], [-lcurses])
+       fi
+       if test "$have_readline" = "no"; then # try with -ltermcap
+                # clear cache
+               AC_MSG_NOTICE([trying again with -ltermcap])
+                unset ac_cv_search_rl_replace_line 2> /dev/null
+               AC_SEARCH_LIBS([rl_replace_line], [readline], [
+                       have_readline=yes
+                       readline_libs="$readline_libs -ltermcap"
+               ], [], [-ltermcap])
+       fi
+fi
+
+if test "$have_readline" = "yes"; then
+       all_errlist_objs="$all_errlist_objs interactive"
+       client_errlist_objs="$client_errlist_objs interactive"
+       client_ldflags="$client_ldflags $readline_libs"
+       audioc_errlist_objs="$audioc_errlist_objs buffer_tree interactive sched time"
+       audioc_ldflags="$audioc_ldflags $readline_libs"
+       AC_SUBST(readline_cppflags)
+       AC_DEFINE(HAVE_READLINE, 1, define to 1 to turn on readline support)
+else
+       AC_MSG_WARN([libreadline not found or unusable])
+fi
+CPPFLAGS="$OLD_CPPFLAGS"
+LDFLAGS="$OLD_LDFLAGS"
+LIBS="$OLD_LIBS"
+#############################################################
+
 
 AC_SUBST(install_sh, [$INSTALL])
 AC_CONFIG_FILES([Makefile])
@@ -701,7 +1020,7 @@ for obj in $all_errlist_objs; do
 done
 AC_DEFINE_UNQUOTED(DEFINE_ERRLIST_OBJECT_ENUM,
        [enum {$SS NUM_SS}],
-       [list of all objects that use paraslash's error facility]
+       [list of all objects that use the paraslash error facility]
 )
 
 ################################################################## status items
@@ -731,7 +1050,6 @@ AC_DEFINE_UNQUOTED(STATUS_ITEM_ARRAY, [$result],
 AC_DEFINE_UNQUOTED(SERVER_AUDIO_FORMATS, "$server_audio_formats",
        [formats supported by para_server and para_afh])
 
-
 AC_SUBST(executables, add_para($executables))
 
 recv_objs="$recv_cmdline_objs $recv_errlist_objs"
@@ -824,6 +1142,7 @@ AC_MSG_NOTICE([
 paraslash configuration:
 ~~~~~~~~~~~~~~~~~~~~~~~~
 unix socket credentials: $have_ucred
+readline (interactive CLIs): $have_readline
 audio formats supported by para_server/para_afh: $server_audio_formats
 id3 version2 support: $have_libid3tag
 filters supported by para_audiod/para_filter: $filters