configure.ac

   1 #
   2 # Copyright (C) 2010-2017 Red Hat, Inc.  All rights reserved.
   3 #
   4 # Authors: Fabio M. Di Nitto <fabbione@kronosnet.org>
   5 #          Federico Simoncelli <fsimon@kronosnet.org>
   6 #
   7 # This software licensed under GPL-2.0+, LGPL-2.0+
   8 #
   9
  10 #                                               -*- Autoconf -*-
  11 # Process this file with autoconf to produce a configure script.
  12 #
  13
  14 AC_PREREQ([2.63])
  15 AC_INIT([kronosnet],
  16         m4_esyscmd([build-aux/git-version-gen .tarball-version]),
  17         [devel@lists.kronosnet.org])
  18 AC_USE_SYSTEM_EXTENSIONS
  19 AM_INIT_AUTOMAKE([1.13 dist-bzip2 dist-xz color-tests -Wno-portability subdir-objects])
  20 LT_PREREQ([2.2.6])
  21 LT_INIT
  22
  23 AC_CONFIG_MACRO_DIR([m4])
  24 AC_CONFIG_SRCDIR([kronosnetd/main.c])
  25 AC_CONFIG_HEADERS([config.h])
  26
  27 AC_CANONICAL_HOST
  28 AC_PROG_LIBTOOL
  29
  30 AC_LANG([C])
  31
  32 systemddir=${prefix}/lib/systemd/system
  33
  34 if test "$prefix" = "NONE"; then
  35         prefix="/usr"
  36         if test "$localstatedir" = "\${prefix}/var"; then
  37                 localstatedir="/var"
  38         fi
  39         if test "$sysconfdir" = "\${prefix}/etc"; then
  40                 sysconfdir="/etc"
  41         fi
  42         if test "$systemddir" = "NONE/lib/systemd/system"; then
  43                 systemddir=/lib/systemd/system
  44         fi
  45         if test "$libdir" = "\${exec_prefix}/lib"; then
  46                 if test -e /usr/lib64; then
  47                         libdir="/usr/lib64"
  48                 else
  49                         libdir="/usr/lib"
  50                 fi
  51         fi
  52 fi
  53
  54 AC_PROG_AWK
  55 AC_PROG_GREP
  56 AC_PROG_SED
  57 AC_PROG_CPP
  58 AC_PROG_CC
  59 AC_PROG_CC_C99
  60 if test "x$ac_cv_prog_cc_c99" = "xno"; then
  61         AC_MSG_ERROR(["C99 support is required"])
  62 fi
  63 AC_PROG_LN_S
  64 AC_PROG_INSTALL
  65 AC_PROG_MAKE_SET
  66 PKG_PROG_PKG_CONFIG
  67 AC_CHECK_PROGS([DOXYGEN], [doxygen])
  68 AC_CHECK_PROGS([DOXY2MAN], [doxy2man])
  69
  70 manpageupdates=1
  71 if test "x$DOXYGEN" = "x" || test "x$DOXY2MAN" = "x"; then
  72         manpageupdates=0;
  73 fi
  74
  75 AM_CONDITIONAL([MANPAGEUPDATES], [test $manpageupdates -gt 0])
  76
  77 AC_CHECK_PROGS([VALGRIND_EXEC], [valgrind])
  78 AM_CONDITIONAL([HAS_VALGRIND], [test x$VALGRIND_EXEC != "x"])
  79
  80 AC_ARG_ENABLE([libknet-sctp],
  81         [  --disable-libknet-sctp            : disable libknet SCTP support ],,
  82         [ enable_libknet_sctp="yes" ])
  83 AM_CONDITIONAL([BUILDSCTP], [test x$enable_libknet_sctp = xyes])
  84
  85 AC_ARG_ENABLE([crypto-all],
  86         [  --disable-crypto-all              : disable libknet all crypto modules support ],,
  87         [ enable_crypto_all="yes" ])
  88
  89 AC_ARG_ENABLE([crypto-nss],
  90         [  --disable-crypto-nss              : disable libknet nss support ],,
  91         [ enable_crypto_nss="$enable_crypto_all" ])
  92 AM_CONDITIONAL([BUILDCRYPTONSS], [test x$enable_crypto_nss = xyes])
  93
  94 AC_ARG_ENABLE([crypto-openssl],
  95         [  --disable-crypto-openssl          : disable libknet openssl support ],,
  96         [ enable_crypto_openssl="$enable_crypto_all" ])
  97 AM_CONDITIONAL([BUILDCRYPTOOPENSSL], [test x$enable_crypto_openssl = xyes])
  98
  99 AC_ARG_ENABLE([compress-all],
 100         [  --disable-compress-all            : disable libknet all compress modules support ],,
 101         [ enable_compress_all="yes" ])
 102
 103 AC_ARG_ENABLE([compress-zlib],
 104         [  --disable-compress-zlib           : disable libknet zlib support ],,
 105         [ enable_compress_zlib="$enable_compress_all" ])
 106 AM_CONDITIONAL([BUILDCOMPZLIB], [test x$enable_compress_zlib = xyes])
 107
 108 AC_ARG_ENABLE([compress-lz4],
 109         [  --disable-compress-lz4            : disable libknet lz4 support ],,
 110         [ enable_compress_lz4="$enable_compress_all" ])
 111 AM_CONDITIONAL([BUILDCOMPLZ4], [test x$enable_compress_lz4 = xyes])
 112
 113 AC_ARG_ENABLE([compress-lzo2],
 114         [  --disable-compress-lzo2           : disable libknet lzo2 support ],,
 115         [ enable_compress_lzo2="$enable_compress_all" ])
 116 AM_CONDITIONAL([BUILDCOMPLZO2], [test x$enable_compress_lzo2 = xyes])
 117
 118 AC_ARG_ENABLE([compress-lzma],
 119         [  --disable-compress-lzma           : disable libknet lzma support ],,
 120         [ enable_compress_lzma="$enable_compress_all" ])
 121 AM_CONDITIONAL([BUILDCOMPLZMA], [test x$enable_compress_lzma = xyes])
 122
 123 AC_ARG_ENABLE([compress-bzip2],
 124         [  --disable-compress-bzip2          : disable libknet bzip2 support ],,
 125         [ enable_compress_bzip2="$enable_compress_all" ])
 126 AM_CONDITIONAL([BUILDCOMPBZIP2], [test x$enable_compress_bzip2 = xyes])
 127
 128 AC_ARG_ENABLE([poc],
 129         [  --enable-poc                      : enable building poc code ],,
 130         [ enable_poc="no" ])
 131 AM_CONDITIONAL([BUILD_POC], [test x$enable_poc = xyes])
 132
 133 AC_ARG_ENABLE([kronosnetd],
 134         [  --enable-kronosnetd               : Kronosnetd support ],,
 135         [ enable_kronosnetd="no" ])
 136 AM_CONDITIONAL([BUILD_KRONOSNETD], [test x$enable_kronosnetd = xyes])
 137
 138 AC_ARG_ENABLE([runautogen],
 139         [  --enable-runautogen               : run autogen.sh ],,
 140         [ enable_runautogen="no" ])
 141 AM_CONDITIONAL([BUILD_RUNAUTOGEN], [test x$enable_runautogen = xyes])
 142
 143 AC_ARG_ENABLE([libtap],
 144         [  --enable-libtap                   : libtap support ],,
 145         [ enable_libtap="no" ])
 146
 147 if test "x$enable_kronosnetd" = xyes; then
 148         enable_libtap=yes
 149 fi
 150 AM_CONDITIONAL([BUILD_LIBTAP], [test x$enable_libtap = xyes])
 151
 152 ## local helper functions
 153 # this function checks if CC support options passed as
 154 # args. Global CFLAGS are ignored during this test.
 155 cc_supports_flag() {
 156         saveCPPFLAGS="$CPPFLAGS"
 157         CPPFLAGS="$@"
 158         if echo $CC | grep -q clang; then
 159                 CPPFLAGS="-Werror $CPPFLAGS"
 160         fi
 161         AC_MSG_CHECKING([whether $CC supports "$@"])
 162         AC_PREPROC_IFELSE([AC_LANG_PROGRAM([])],
 163                           [RC=0; AC_MSG_RESULT([yes])],
 164                           [RC=1; AC_MSG_RESULT([no])])
 165         CPPFLAGS="$saveCPPFLAGS"
 166         return $RC
 167 }
 168
 169 # helper macro to check libs without adding them to LIBS
 170 check_lib_no_libs() {
 171         lib_no_libs_arg1=$1
 172         shift
 173         lib_no_libs_arg2=$1
 174         shift
 175         lib_no_libs_args=$@
 176         AC_CHECK_LIB([$lib_no_libs_arg1],
 177                      [$lib_no_libs_arg2],,,
 178                      [$lib_no_libs_args])
 179         LIBS=$ac_check_lib_save_LIBS
 180 }
 181
 182 # Checks for C features
 183 AC_C_INLINE
 184
 185 # Checks for libraries.
 186 AC_CHECK_LIB([pthread], [pthread_create], [AC_SUBST([pthread_LIBS], [-lpthread])], [AC_MSG_ERROR([kronosnet requires pthread library])])
 187 AC_CHECK_LIB([m], [ceil], [AC_SUBST([m_LIBS], [-lm])], [AC_MSG_ERROR([kronosnet requires m library])])
 188 AC_CHECK_LIB([rt], [clock_gettime], [AC_SUBST([rt_LIBS], [-lrt])], [AC_MSG_ERROR([kronosnet requires rt library])])
 189
 190 AC_SEARCH_LIBS([dlopen], [dl dld], [dllibs=$ac_res], [AC_MSG_ERROR([kronosnet requires dl library])])
 191
 192 if test "x$dllibs" != "xnone required"; then
 193         AC_SUBST([dl_LIBS], [$dllibs])
 194 fi
 195
 196 # OS detection
 197
 198 AC_MSG_CHECKING([for os in ${host_os}])
 199 case "$host_os" in
 200         *linux*)
 201                 AC_DEFINE_UNQUOTED([KNET_LINUX], [1], [Compiling for Linux platform])
 202                 AC_MSG_RESULT([Linux])
 203                 ;;
 204         *bsd*)
 205                 AC_DEFINE_UNQUOTED([KNET_BSD], [1], [Compiling for BSD platform])
 206                 AC_MSG_RESULT([BSD])
 207                 if test "x$enable_libtap" = xyes; then
 208                         AC_MSG_ERROR([libtap is not currently supported on BSD platforms])
 209                 fi
 210                 ;;
 211         *)
 212                 AC_MSG_ERROR([Unsupported OS? hmmmm])
 213                 ;;
 214 esac
 215
 216 # crypto libraries checks
 217 if test "x$enable_crypto_nss" = xyes; then
 218         PKG_CHECK_MODULES([nss],[nss])
 219         AC_DEFINE_UNQUOTED([BUILDCRYPTONSS], [1], [Enable nss crypto])
 220 fi
 221
 222 if test "x$enable_crypto_openssl" = xyes; then
 223         PKG_CHECK_MODULES([openssl],[openssl < 1.1],
 224                           [AC_DEFINE_UNQUOTED([BUILDCRYPTOOPENSSL10], [1], [openssl 1.0 crypto])],
 225                           [PKG_CHECK_MODULES([openssl],[openssl >= 1.1],
 226                                              [AC_DEFINE_UNQUOTED([BUILDCRYPTOOPENSSL11], [1], [openssl 1.1 crypto])])])
 227         AC_DEFINE_UNQUOTED([BUILDCRYPTOOPENSSL], [1], [Enable openssl crypto])
 228 fi
 229
 230 # compress libraries checks
 231 if test "x$enable_compress_zlib" = xyes; then
 232         PKG_CHECK_MODULES([zlib], [zlib])
 233         AC_DEFINE_UNQUOTED([BUILDCOMPZLIB], [1], [Enable zlib compression])
 234 fi
 235 if test "x$enable_compress_lz4" = xyes; then
 236         PKG_CHECK_MODULES([liblz4], [liblz4])
 237         AC_DEFINE_UNQUOTED([BUILDCOMPLZ4], [1], [Enable lz4 compress])
 238 fi
 239 if test "x$enable_compress_lzo2" = xyes; then
 240         PKG_CHECK_MODULES([lzo2], [lzo2],,
 241                 [AC_CHECK_HEADERS([lzo/lzo1x.h],
 242                         [AC_CHECK_LIB([lzo2], [lzo1x_decompress_safe],
 243                                 [AC_SUBST([lzo2_LIBS], [-llzo2])])],
 244                                 [AC_MSG_ERROR(["missing required lzo/lzo1x.h header"])])])
 245         AC_DEFINE_UNQUOTED([BUILDCOMPLZO2], [1], [Enable lzo2 compress])
 246 fi
 247 if test "x$enable_compress_lzma" = xyes; then
 248         PKG_CHECK_MODULES([liblzma], [liblzma])
 249         AC_DEFINE_UNQUOTED([BUILDCOMPLZMA], [1], [Enable lzma compress])
 250 fi
 251 if test "x$enable_compress_bzip2" = xyes; then
 252         PKG_CHECK_MODULES([bzip2], [bzip2],,
 253                 [AC_CHECK_HEADERS([bzlib.h],
 254                         [AC_CHECK_LIB([bz2], [BZ2_bzBuffToBuffCompress],
 255                                 [AC_SUBST([bzip2_LIBS], [-lbz2])])],
 256                                 [AC_MSG_ERROR(["missing required bzlib.h"])])])
 257         AC_DEFINE_UNQUOTED([BUILDCOMPBZIP2], [1], [Enable bzip2 compress])
 258 fi
 259
 260 # Checks for header files.
 261 AC_CHECK_HEADERS([fcntl.h])
 262 AC_CHECK_HEADERS([stdlib.h])
 263 AC_CHECK_HEADERS([string.h])
 264 AC_CHECK_HEADERS([strings.h])
 265 AC_CHECK_HEADERS([sys/ioctl.h])
 266 AC_CHECK_HEADERS([syslog.h])
 267 AC_CHECK_HEADERS([unistd.h])
 268 AC_CHECK_HEADERS([netinet/in.h])
 269 AC_CHECK_HEADERS([sys/socket.h])
 270 AC_CHECK_HEADERS([arpa/inet.h])
 271 AC_CHECK_HEADERS([netdb.h])
 272 AC_CHECK_HEADERS([limits.h])
 273 AC_CHECK_HEADERS([stdint.h])
 274 AC_CHECK_HEADERS([sys/epoll.h])
 275
 276 if test "x$enable_libknet_sctp" = xyes; then
 277         AC_CHECK_HEADERS([netinet/sctp.h],, [AC_MSG_ERROR(["missing required SCTP headers"])])
 278 fi
 279
 280 # Checks for typedefs, structures, and compiler characteristics.
 281 AC_C_INLINE
 282 AC_TYPE_SIZE_T
 283 AC_TYPE_PID_T
 284 AC_TYPE_SSIZE_T
 285 AC_TYPE_UINT8_T
 286 AC_TYPE_UINT16_T
 287 AC_TYPE_UINT32_T
 288 AC_TYPE_UINT64_T
 289 AC_TYPE_INT32_T
 290
 291 # Checks for library functions.
 292 AC_FUNC_ALLOCA
 293 AC_FUNC_FORK
 294 AC_FUNC_MALLOC
 295 AC_FUNC_REALLOC
 296 AC_CHECK_FUNCS([memset])
 297 AC_CHECK_FUNCS([strdup])
 298 AC_CHECK_FUNCS([strerror])
 299 AC_CHECK_FUNCS([dup2])
 300 AC_CHECK_FUNCS([select])
 301 AC_CHECK_FUNCS([socket])
 302 AC_CHECK_FUNCS([inet_ntoa])
 303 AC_CHECK_FUNCS([memmove])
 304 AC_CHECK_FUNCS([strchr])
 305 AC_CHECK_FUNCS([atexit])
 306 AC_CHECK_FUNCS([ftruncate])
 307 AC_CHECK_FUNCS([strrchr])
 308 AC_CHECK_FUNCS([strstr])
 309 AC_CHECK_FUNCS([clock_gettime])
 310 AC_CHECK_FUNCS([strcasecmp])
 311 AC_CHECK_FUNCS([kevent])
 312 # if neither sys/epoll.h nor kevent are present, we should fail.
 313
 314 if test "x$ac_cv_header_sys_epoll_h" = xno && test "x$ac_cv_func_kevent" = xno; then
 315         AC_MSG_ERROR([Both epoll and kevent unavailable on this OS])
 316 fi
 317
 318 if test "x$ac_cv_header_sys_epoll_h" = xyes && test "x$ac_cv_func_kevent" = xyes; then
 319         AC_MSG_ERROR([Both epoll and kevent available on this OS, please contact the maintainers to fix the code])
 320 fi
 321
 322 # checks (for kronosnetd)
 323 if test "x$enable_kronosnetd" = xyes; then
 324         AC_CHECK_HEADERS([security/pam_appl.h],
 325                          [AC_CHECK_LIB([pam], [pam_start])],
 326                          [AC_MSG_ERROR([Unable to find LinuxPAM devel files])])
 327
 328         AC_CHECK_HEADERS([security/pam_misc.h],
 329                          [AC_CHECK_LIB([pam_misc], [misc_conv])],
 330                          [AC_MSG_ERROR([Unable to find LinuxPAM MISC devel files])])
 331
 332         PKG_CHECK_MODULES([libqb], [libqb])
 333
 334         AC_CHECK_LIB([qb], [qb_log_thread_priority_set],
 335                      [have_qb_log_thread_priority_set="yes"],
 336                      [have_qb_log_thread_priority_set="no"])
 337         if test "x${have_qb_log_thread_priority_set}" = xyes; then
 338                 AC_DEFINE_UNQUOTED([HAVE_QB_LOG_THREAD_PRIORITY_SET], [1], [have qb_log_thread_priority_set])
 339         fi
 340 fi
 341
 342 # local options
 343 AC_ARG_ENABLE([debug],
 344         [  --enable-debug          enable debug build. ],
 345         [ default="no" ])
 346
 347 AC_ARG_WITH([initdefaultdir],
 348         [  --with-initdefaultdir   : path to /etc/sysconfig/.. or /etc/default dir. ],
 349         [ INITDEFAULTDIR="$withval" ],
 350         [ INITDEFAULTDIR="$sysconfdir/default" ])
 351
 352 AC_ARG_WITH([initddir],
 353         [  --with-initddir=DIR     : path to init script directory. ],
 354         [ INITDDIR="$withval" ],
 355         [ INITDDIR="$sysconfdir/init.d" ])
 356
 357 AC_ARG_WITH([systemddir],
 358         [  --with-systemddir=DIR   : path to systemd unit files directory. ],
 359         [ SYSTEMDDIR="$withval" ],
 360         [ SYSTEMDDIR="$systemddir" ])
 361
 362 AC_ARG_WITH([syslogfacility],
 363         [  --with-syslogfacility=FACILITY
 364                           default syslog facility. ],
 365         [ SYSLOGFACILITY="$withval" ],
 366         [ SYSLOGFACILITY="LOG_DAEMON" ])
 367
 368 AC_ARG_WITH([sysloglevel],
 369         [  --with-sysloglevel=LEVEL
 370                           default syslog level. ],
 371         [ SYSLOGLEVEL="$withval" ],
 372         [ SYSLOGLEVEL="LOG_INFO" ])
 373
 374 AC_ARG_WITH([defaultadmgroup],
 375         [  --with-defaultadmgroup=GROUP
 376                           define PAM group. Users part of this group will be
 377                           allowed to configure kronosnet. Others will only
 378                           receive read-only rights. ],
 379         [ DEFAULTADMGROUP="$withval" ],
 380         [ DEFAULTADMGROUP="kronosnetadm" ])
 381
 382 ## random vars
 383 LOGDIR=${localstatedir}/log/
 384 RUNDIR=${localstatedir}/run/
 385 DEFAULT_CONFIG_DIR=${sysconfdir}/kronosnet
 386
 387 ## do subst
 388
 389 AM_CONDITIONAL([DEBUG], [test "x${enable_debug}" = xyes])
 390
 391 AC_SUBST([DEFAULT_CONFIG_DIR])
 392 AC_SUBST([INITDEFAULTDIR])
 393 AC_SUBST([INITDDIR])
 394 AC_SUBST([SYSTEMDDIR])
 395 AC_SUBST([LOGDIR])
 396 AC_SUBST([DEFAULTADMGROUP])
 397
 398 AC_DEFINE_UNQUOTED([DEFAULT_CONFIG_DIR],
 399                    ["$(eval echo ${DEFAULT_CONFIG_DIR})"],
 400                    [Default config directory])
 401
 402 AC_DEFINE_UNQUOTED([DEFAULT_CONFIG_FILE],
 403                    ["$(eval echo ${DEFAULT_CONFIG_DIR}/kronosnetd.conf)"],
 404                    [Default config file])
 405
 406 AC_DEFINE_UNQUOTED([LOGDIR],
 407                    ["$(eval echo ${LOGDIR})"],
 408                    [Default logging directory])
 409
 410 AC_DEFINE_UNQUOTED([DEFAULT_LOG_FILE],
 411                    ["$(eval echo ${LOGDIR}/kronosnetd.log)"],
 412                    [Default log file])
 413
 414 AC_DEFINE_UNQUOTED([RUNDIR],
 415                    ["$(eval echo ${RUNDIR})"],
 416                    [Default run directory])
 417
 418 AC_DEFINE_UNQUOTED([SYSLOGFACILITY],
 419                    [$(eval echo ${SYSLOGFACILITY})],
 420                    [Default syslog facility])
 421
 422 AC_DEFINE_UNQUOTED([SYSLOGLEVEL],
 423                    [$(eval echo ${SYSLOGLEVEL})],
 424                    [Default syslog level])
 425
 426 AC_DEFINE_UNQUOTED([DEFAULTADMGROUP],
 427                    ["$(eval echo ${DEFAULTADMGROUP})"],
 428                    [Default admin group])
 429
 430 ## *FLAGS handling
 431 ENV_CFLAGS="$CFLAGS"
 432 ENV_CPPFLAGS="$CPPFLAGS"
 433 ENV_LDFLAGS="$LDFLAGS"
 434
 435 # debug build stuff
 436 if test "x${enable_debug}" = xyes; then
 437         AC_DEFINE_UNQUOTED([DEBUG], [1], [Compiling Debugging code])
 438         OPT_CFLAGS="-O0"
 439 else
 440         OPT_CFLAGS="-O3"
 441 fi
 442
 443 # gdb flags
 444 if test "x${GCC}" = xyes; then
 445         GDB_FLAGS="-ggdb3"
 446 else
 447         GDB_FLAGS="-g"
 448 fi
 449
 450 # extra warnings
 451 EXTRA_WARNINGS=""
 452
 453 WARNLIST="
 454         all
 455         extra
 456         unused
 457         shadow
 458         missing-prototypes
 459         missing-declarations
 460         suggest-attribute=noreturn
 461         suggest-attribute=format
 462         strict-prototypes
 463         declaration-after-statement
 464         pointer-arith
 465         write-strings
 466         cast-align
 467         bad-function-cast
 468         missing-format-attribute
 469         float-equal
 470         format=2
 471         format-signedness
 472         format-security
 473         format-nonliteral
 474         no-long-long
 475         unsigned-char
 476         gnu89-inline
 477         no-strict-aliasing
 478         error
 479         address
 480         cpp
 481         overflow
 482         parentheses
 483         sequence-point
 484         switch
 485         shift-overflow=2
 486         overlength-strings
 487         retundent-decls
 488         init-self
 489         uninitialized
 490         unused-but-set-variable
 491         unused-function
 492         unused-result
 493         unused-value
 494         unused-variable
 495         unknown-pragmas
 496         no-unused-parameter
 497         "
 498
 499 for j in $WARNLIST; do
 500         if cc_supports_flag -W$j; then
 501                 EXTRA_WARNINGS="$EXTRA_WARNINGS -W$j";
 502         fi
 503 done
 504
 505 CFLAGS="$ENV_CFLAGS $lt_prog_compiler_pic $OPT_CFLAGS $GDB_FLAGS \
 506         $EXTRA_WARNINGS $WERROR_CFLAGS"
 507 CPPFLAGS="$ENV_CPPFLAGS"
 508 LDFLAGS="$ENV_LDFLAGS $lt_prog_compiler_pic -Wl,--as-needed"
 509
 510 AC_CONFIG_FILES([
 511                 Makefile
 512                 init/Makefile
 513                 libtap/Makefile
 514                 libtap/libtap.pc
 515                 kronosnetd/Makefile
 516                 kronosnetd/kronosnetd.logrotate
 517                 libknet/Makefile
 518                 libknet/libknet.pc
 519                 libknet/tests/Makefile
 520                 libknet/man/Doxyfile
 521                 libknet/man/Makefile
 522                 poc-code/Makefile
 523                 poc-code/iov-hash/Makefile
 524                 poc-code/access-list/Makefile
 525                 ])
 526
 527 AC_OUTPUT