configure.ac 25.6 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819
#                                               -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.
AC_PREREQ(2.61)
#
# The 0MQ version number is extracted from include/zmq.h using
# the version.sh script. Hence, it should be updated there.
# The version in git should reflect the *next* version planned.
#
AC_INIT([zeromq],[m4_esyscmd([./version.sh])],[zeromq-dev@lists.zeromq.org])

AC_CONFIG_AUX_DIR(config)
AC_CONFIG_MACRO_DIR(config)
AC_CONFIG_HEADERS([src/platform.hpp])
AM_INIT_AUTOMAKE(foreign subdir-objects tar-ustar dist-zip)

m4_pattern_allow([AC_PROG_CC_C99])
m4_include([m4/ax_check_compile_flag.m4])
m4_include([m4/ax_cxx_compile_stdcxx_11.m4])
m4_include([m4/ax_code_coverage.m4])
m4_include([m4/ax_valgrind_check.m4])
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

# This lets us use PACKAGE_VERSION in Makefiles
AC_SUBST(PACKAGE_VERSION)

# Libtool -version-info (ABI version)
#
# Don't change this unless you know exactly what you're doing and have read and
# understand:
# http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
#
# Changes:
#
# ZeroMQ versions prior to 2.1.0 use 0:0:0 (undefined)
# ZeroMQ versions 2.1.x: 1:0:0 (ABI version 1)
# ZeroMQ version 3.0: 2:0:0 (ABI version 2)
# ZeroMQ version 3.1: 3:0:0 (ABI version 3)
# ZeroMQ version 4.0: 4:0:0 (ABI version 4)
# ZeroMQ version 4.1: 5:0:0 (ABI version 5)
# ZeroMQ version 4.2.0: 6:0:1 (ABI version 5)
# ZeroMQ version 4.2.1: 6:1:1 (ABI version 5)
# ZeroMQ version 4.2.2: 6:2:1 (ABI version 5)
# ZeroMQ version 4.2.3: 6:3:1 (ABI version 5)
#
# libzmq -version-info current:revision:age
LTVER="6:3:1"
AC_SUBST(LTVER)

# Take a copy of original flags
ZMQ_ORIG_CFLAGS="${CFLAGS:-none}"
ZMQ_ORIG_CPPFLAGS="${CPPFLAGS:-none}"
ZMQ_ORIG_CXXFLAGS="${CXXFLAGS:-none}"

# Checks for programs.
AC_PROG_CC
AX_CHECK_COMPILE_FLAG([-std=gnu11], [CFLAGS+=" -std=gnu11"], [AC_PROG_CC_C99])
AC_PROG_CXX
AX_CXX_COMPILE_STDCXX_11([ext], [optional])
AX_CODE_COVERAGE
AM_PROG_CC_C_O
AC_PROG_SED
AC_PROG_AWK
PKG_PROG_PKG_CONFIG
m4_pattern_forbid([^PKG_[A-Z_]+$], [missing some pkg-config macros (pkg-config package)])

# Libtool configuration for different targets. See acinclude.m4
AC_ARG_VAR([XMLTO], [path to xmlto command])
AC_PATH_PROG([XMLTO], [xmlto])
AC_ARG_VAR([ASCIIDOC], [path to asciidoc command])
AC_PATH_PROG([ASCIIDOC], [asciidoc])
LIBZMQ_CONFIG_LIBTOOL
AC_LIBTOOL_WIN32_DLL
AC_PROG_LIBTOOL
AX_VALGRIND_CHECK

# Check whether to build a with debug symbols
LIBZMQ_CHECK_ENABLE_DEBUG

# Check whether to enable code coverage
LIBZMQ_WITH_GCOV

AC_MSG_CHECKING([if TIPC is available and supports nonblocking connect])

AC_RUN_IFELSE(
    [AC_LANG_PROGRAM([[
            #include <stdlib.h>
            #include <string.h>
            #include <fcntl.h>
            #include <errno.h>
            #include <sys/socket.h>
            #include <linux/tipc.h>
        ]],[[
            struct sockaddr_tipc topsrv;
            int sd = socket(AF_TIPC, SOCK_SEQPACKET, 0);
            if (sd == -EAFNOSUPPORT) {
                return 1;
            }
            memset(&topsrv, 0, sizeof(topsrv));
            topsrv.family = AF_TIPC;
            topsrv.addrtype = TIPC_ADDR_NAME;
            topsrv.addr.name.name.type = TIPC_TOP_SRV;
            topsrv.addr.name.name.instance = TIPC_TOP_SRV;
            fcntl(sd, F_SETFL, O_NONBLOCK);
            if (connect(sd, (struct sockaddr *)&topsrv, sizeof(topsrv)) != 0) {
                if (errno != EINPROGRESS)
                    return -1;
            }
        ]])
    ],
    [libzmq_tipc_support=yes],
    [libzmq_tipc_support=no],
    [libzmq_tipc_support=no])

AC_MSG_RESULT([$libzmq_tipc_support])

AC_ARG_ENABLE([pedantic],
    [AS_HELP_STRING([--disable-pedantic], [disable pedantic compiler checks [default=enabled]])],
    [libzmq_pedantic=$enableval], [libzmq_pedantic=yes])

AC_ARG_WITH([militant],
    [AS_HELP_STRING([--with-militant],
        [enable militant API assertions])],
    [zmq_militant="yes"],
    [])

if test "x$zmq_militant" = "xyes"; then
    AC_DEFINE(ZMQ_ACT_MILITANT, 1, [Enable militant API assertions])
fi

# Memory mis-use detection
AC_MSG_CHECKING([whether to enable ASan])
AC_ARG_ENABLE(address-sanitizer, [AS_HELP_STRING([--enable-address-sanitizer=yes/no],
                  [Build with GCC Address Sanitizer instrumentation])],
                  [ZMQ_ASAN="$enableval"])

if test "x${ZMQ_ASAN}" == "xyes"; then
    CFLAGS="${CFLAGS} -fsanitize=address"
    CXXFLAGS="${CXXFLAGS} -fsanitize=address"

    AM_CONDITIONAL(ENABLE_ASAN, true)
    AC_MSG_RESULT([yes])
else
    AM_CONDITIONAL(ENABLE_ASAN, false)
    AC_MSG_RESULT([no])
fi

# By default compiling with -Werror except OSX.
libzmq_werror="yes"

# By default use DSO visibility
libzmq_dso_visibility="yes"

# Platform specific checks
libzmq_on_mingw="no"
libzmq_on_cygwin="no"
libzmq_on_android="no"
libzmq_on_linux="no"
libzmq_on_gnu="no"

# Set some default features required by ZeroMQ code
CPPFLAGS="-D_REENTRANT -D_THREAD_SAFE -Wno-long-long $CPPFLAGS"

# Will be used to add flags to pkg-config useful when apps want to statically link
PKGCFG_LIBS_PRIVATE=""

# For host type checks
AC_CANONICAL_HOST

# OS-specific tests
case "${host_os}" in
    *linux*)
        # Define on Linux to enable all library features. Define if using a gnu compiler
        if test "x$GXX" = "xyes"; then
            CPPFLAGS="-D_GNU_SOURCE $CPPFLAGS"
        fi
        AC_DEFINE(ZMQ_HAVE_LINUX, 1, [Have Linux OS])
        libzmq_on_linux="yes"

        # dladdr/dlopen is in libdl on glibc
        AC_SEARCH_LIBS([dladdr], [dl dld], [], [
          AC_MSG_ERROR([unable to find the dladdr() function])
        ])

        if test "x$libzmq_tipc_support" = "xyes"; then
            AC_DEFINE(ZMQ_HAVE_TIPC, 1, [Have TIPC support])
        fi
        case "${host_os}" in
            *android*)
                AC_DEFINE(ZMQ_HAVE_ANDROID, 1, [Have Android OS])
                libzmq_on_android="yes"
            ;;
        esac
        ;;
    *solaris*)
        # Define on Solaris to enable all library features
        CPPFLAGS="-Wno-sign-compare -D_PTHREADS $CPPFLAGS"
        AC_DEFINE(ZMQ_HAVE_SOLARIS, 1, [Have Solaris OS])
        AC_CHECK_LIB(socket, socket)
        AC_CHECK_LIB(nsl, gethostbyname)
        AC_MSG_CHECKING([whether atomic operations can be used])
        AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
            [[#include <atomic.h>]],
            [[uint32_t value;
              atomic_cas_32 (&value, 0, 0);
              return 0;]])],
            [solaris_has_atomic=yes],
            [solaris_has_atomic=no])
        AC_MSG_RESULT([$solaris_has_atomic])
        # Solaris 8 does not have atomic operations exported to user space.
        if test "x$solaris_has_atomic" = "xno"; then
            AC_DEFINE(ZMQ_FORCE_MUTEXES, 1, [Force to use mutexes])
        fi
        ;;
    *freebsd*)
        # Define on FreeBSD to enable all library features
        CPPFLAGS="-D__BSD_VISIBLE $CPPFLAGS"
        AC_DEFINE(ZMQ_HAVE_FREEBSD, 1, [Have FreeBSD OS])
        ;;
    *dragonfly*)
        CPPFLAGS="-D__BSD_VISIBLE $CPPFLAGS"
        AC_DEFINE(ZMQ_HAVE_DRAGONFLY, 1, [Have DragonFly OS])
        ;;
    *darwin*)
        # Define on Darwin to enable all library features
        CPPFLAGS="-D_DARWIN_C_SOURCE $CPPFLAGS"
        libzmq_pedantic="no"
        libzmq_werror="no"
        AC_DEFINE(ZMQ_HAVE_OSX, 1, [Have DarwinOSX OS])
        AC_LANG_PUSH([C++])
        LIBZMQ_CHECK_LANG_FLAG_PREPEND([-Wno-uninitialized])
        AC_LANG_POP([C++])
        ;;
    *netbsd*)
        # Define on NetBSD to enable all library features
        CPPFLAGS="-D_NETBSD_SOURCE $CPPFLAGS"
        AC_DEFINE(ZMQ_HAVE_NETBSD, 1, [Have NetBSD OS])
        # NetBSD 5.0 and newer provides atomic operations but we can
        # only use these on systems where PR #42842 has been fixed so
        # we must try and link a test program using C++.
        libzmq_netbsd_has_atomic=no
        AC_MSG_CHECKING([whether atomic operations can be used])
        AC_LANG_PUSH([C++])
        AC_LINK_IFELSE([AC_LANG_PROGRAM(
            [[#include <atomic.h>]],
            [[uint32_t value;
              atomic_cas_32 (&value, 0, 0);
              return 0;]])],
            [libzmq_netbsd_has_atomic=yes],
            [libzmq_netbsd_has_atomic=no])
        AC_LANG_POP([C++])
        AC_MSG_RESULT([$libzmq_netbsd_has_atomic])
        if test "x$libzmq_netbsd_has_atomic" = "xno"; then
            AC_DEFINE(ZMQ_FORCE_MUTEXES, 1, [Force to use mutexes])
        fi
        ;;
    *openbsd*|*bitrig*)
        # Define on OpenBSD to enable all library features
        CPPFLAGS="-D_BSD_SOURCE $CPPFLAGS"
        AC_DEFINE(ZMQ_HAVE_OPENBSD, 1, [Have OpenBSD OS])
        ;;
    *nto-qnx*)
        libzmq_pedantic="no"
        AC_DEFINE(ZMQ_HAVE_QNXNTO, 1, [Have QNX Neutrino OS])
        AC_CHECK_LIB(socket, socket)
        ;;
    *aix*)
        AC_DEFINE(ZMQ_HAVE_AIX, 1, [Have AIX OS])
        ;;
    *hpux*)
        # Define on HP-UX to enable all library features
        CPPFLAGS="-D_POSIX_C_SOURCE=200112L $CPPFLAGS"
        AC_DEFINE(ZMQ_HAVE_HPUX, 1, [Have HPUX OS])
        LIBZMQ_CHECK_LANG_FLAG_PREPEND([-Ae])
        AC_CHECK_FUNCS(gethrtime)
        ;;
    *mingw*|*msys*)
        AC_DEFINE(ZMQ_HAVE_WINDOWS, 1, [Have Windows OS])
        AC_DEFINE(ZMQ_HAVE_MINGW, 1, [Have MinGW])
        AC_CHECK_HEADERS(windows.h)
        AC_CHECK_LIB(ws2_32, main, ,
            [AC_MSG_ERROR([cannot link with ws2_32.dll.])])
        AC_CHECK_LIB(rpcrt4, main, ,
            [AC_MSG_ERROR([cannot link with rpcrt4.dll.])])
        AC_CHECK_LIB(iphlpapi, main, ,
            [AC_MSG_ERROR([cannot link with iphlpapi.dll.])])
        libzmq_on_mingw="yes"
        libzmq_dso_visibility="no"

        if test "x$enable_static" = "xyes"; then
            CPPFLAGS="-DZMQ_STATIC $CPPFLAGS"
        fi
	# Set FD_SETSIZE to 16384
	CPPFLAGS=" -DFD_SETSIZE=16384 $CPPFLAGS"
        ;;
    *cygwin*)
        # Define on Cygwin to enable all library features
        CPPFLAGS="-D_GNU_SOURCE $CPPFLAGS"
        AC_DEFINE(ZMQ_HAVE_CYGWIN, 1, [Have Cygwin])
        libzmq_on_cygwin="yes"
        libzmq_dso_visibility="no"
        if test "x$enable_static" = "xyes"; then
            AC_MSG_ERROR([Building static libraries is not supported under Cygwin])
        fi
        ;;
    gnu*)
        # Define on GNU/Hurd to enable all library features. Define if using a gnu compiler
        if test "x$GXX" = "xyes"; then
            CPPFLAGS="-D_GNU_SOURCE $CPPFLAGS"
        fi
        AC_DEFINE(ZMQ_HAVE_GNU, 1, [Have GNU/Hurd OS])
        libzmq_on_gnu="yes"
	AC_CHECK_LIB(rt, sem_init)
        ;;
    *)
        AC_MSG_ERROR([unsupported system: ${host_os}.])
        ;;
esac

# Checks for libraries
AC_CHECK_LIB([pthread], [pthread_create])
AC_CHECK_LIB([rt], [clock_gettime])

#
# Check if the compiler supports -fvisibility=hidden flag. MinGW uses __declspec
#
if test "x$libzmq_dso_visibility" = "xyes"; then
    AC_LANG_PUSH([C++])
    LIBZMQ_CHECK_LANG_VISIBILITY([LIBZMQ_EXTRA_CXXFLAGS="$libzmq_cv_[]_AC_LANG_ABBREV[]_visibility_flag ${LIBZMQ_EXTRA_CXXFLAGS}"])
    AC_LANG_POP([C++])
fi

# CPU-specific optimizations
case "${host_cpu}" in
    *sparc64*)
        AC_LANG_PUSH([C++])
        LIBZMQ_CHECK_LANG_FLAG_PREPEND([-mcpu=v9])
        AC_LANG_POP([C++])
    ;;
    *)
    ;;
esac

# Check whether to build docs / install man pages
LIBZMQ_CHECK_DOC_BUILD

# Check polling system, set appropriate macro in src/platform.hpp
LIBZMQ_CHECK_POLLER

# Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS(\
    errno.h \
    time.h \
    unistd.h \
    limits.h \
    stddef.h \
    stdlib.h \
    string.h \
    arpa/inet.h \
    netinet/tcp.h \
    netinet/in.h \
    sys/socket.h \
    sys/time.h)

# Check if we have ifaddrs.h header file.
AC_CHECK_HEADERS(ifaddrs.h, [AC_DEFINE(ZMQ_HAVE_IFADDRS, 1, [Have ifaddrs.h header.])])

# Check if we have sys/uio.h header file.
AC_CHECK_HEADERS(sys/uio.h, [AC_DEFINE(ZMQ_HAVE_UIO, 1, [Have uio.h header.])])

# Force not to use eventfd
AC_ARG_ENABLE([eventfd],
    [AS_HELP_STRING([--disable-eventfd], [disable eventfd [default=enabled]])],
    [zmq_enable_eventfd=$enableval],
    [zmq_enable_eventfd=yes])

if test "x$zmq_enable_eventfd" = "xyes"; then
    # Check if we have eventfd.h header file.
    AC_CHECK_HEADERS(sys/eventfd.h, [
        AC_DEFINE(ZMQ_HAVE_EVENTFD, 1, [Have eventfd extension])
        LIBZMQ_CHECK_EVENTFD_CLOEXEC([
            AC_DEFINE([ZMQ_HAVE_EVENTFD_CLOEXEC],
               [1],
               [Whether EFD_CLOEXEC is defined and functioning.])
            ])
    ])
fi

# Conditionally build performance measurement tools
AC_ARG_ENABLE([perf],
    [AS_HELP_STRING([--disable-perf], [don't build performance measurement tools [default=build]])],
    [zmq_enable_perf=$enableval],
    [zmq_enable_perf=yes])

AM_CONDITIONAL(ENABLE_PERF, test "x$zmq_enable_perf" = "xyes")

# Conditionally build curve key generation tool
AC_ARG_ENABLE([curve-keygen],
    [AS_HELP_STRING([--disable-curve-keygen], [don't build curve-keygen tool [default=build]])],
    [zmq_enable_curve_keygen=$enableval],
    [zmq_enable_curve_keygen=yes])

# Use c++ in subsequent tests
AC_LANG_PUSH(C++)

AC_CHECK_DECLS([SO_PEERCRED],
    [AC_DEFINE(ZMQ_HAVE_SO_PEERCRED, 1, [Have SO_PEERCRED socket option])],
    [],
    [#include <sys/socket.h>])

AC_CHECK_DECLS([LOCAL_PEERCRED],
    [AC_DEFINE(ZMQ_HAVE_LOCAL_PEERCRED, 1, [Have LOCAL_PEERCRED socket option])],
    [],
    [#include <sys/socket.h>])

AM_CONDITIONAL(HAVE_IPC_PEERCRED, test "x$ac_cv_have_decl_SO_PEERCRED" = "xyes" || test "x$ac_cv_have_decl_LOCAL_PEERCRED" = "xyes")

AC_HEADER_STDBOOL
AC_C_CONST
AC_C_INLINE

# Checks for typedefs, structures, and compiler characteristics.
if test "x$libzmq_cv_[]_AC_LANG_ABBREV[]_intel_compiler" = "xyes"; then
    dnl 279: controlling expression is constant
    dnl Fixes build with ICC 12.x
    LIBZMQ_CHECK_WITH_FLAG([-wd279], [AC_TYPE_SIZE_T])
    LIBZMQ_CHECK_WITH_FLAG([-wd279], [AC_TYPE_SSIZE_T])
else
    AC_TYPE_SIZE_T
    AC_TYPE_SSIZE_T
fi

AC_HEADER_TIME
AC_TYPE_UINT32_T
AC_C_VOLATILE

# build using libgssapi_krb5
AC_ARG_WITH([libgssapi_krb5], [AS_HELP_STRING([--with-libgssapi_krb5],
    [require libzmq build with libgssapi_krb5 [default=no]])],
    [require_libgssapi_krb5_ext=$withval],
    [require_libgssapi_krb5_ext=no])

# conditionally require libgssapi_krb5
if test "x$require_libgssapi_krb5_ext" != "xno"; then
    PKG_CHECK_MODULES([gssapi_krb5], [krb5-gssapi], [], [
        AC_CHECK_HEADERS(gssapi/gssapi_generic.h)
        AC_SEARCH_LIBS([gss_init_sec_context], [gssapi_krb5 gssapi],
            AC_DEFINE(HAVE_LIBGSSAPI_KRB5, [1], [Enabled GSSAPI security]),
            AC_MSG_ERROR(libgssapi_krb5 is needed for GSSAPI security))
    ])
fi
AM_CONDITIONAL(BUILD_GSSAPI, test "x$require_libgssapi_krb5_ext" != "xno")

# Select curve encryption library, defaults to tweetnacl
# To use libsodium instead, use --with-libsodium (must be installed)
# To disable curve, use --disable-curve

AC_ARG_WITH([libsodium],
    [AS_HELP_STRING([--with-libsodium], [use libsodium instead of built-in tweetnacl [default=no]])])

AS_IF([test "x$with_libsodium" = "xyes"], [
    PKG_CHECK_MODULES([sodium], [libsodium], [libsodium_found=yes], [
        AC_MSG_ERROR(libsodium is not installed. Install it, then run configure again)
    ])
])

AC_ARG_ENABLE([curve],
    [AS_HELP_STRING([--disable-curve], [disable CURVE security [default=no]])])

if test "x$enable_curve" = "xno"; then
    curve_library=""
    AC_MSG_NOTICE([CURVE security is disabled])

elif test "x$with_libsodium" = "xyes"; then
    AC_MSG_NOTICE([Using libsodium for CURVE security])
    AC_DEFINE(ZMQ_HAVE_CURVE, [1], [Using curve encryption])
    AC_DEFINE(ZMQ_USE_LIBSODIUM, [1], [Using libsodium for curve encryption])
    curve_library="libsodium"
    enable_curve="yes"

    # On Solaris, libsodium depends on libssp
    case "${host_os}" in
        *solaris*)
            LDFLAGS="-lssp $LDFLAGS"
            libzmq_pedantic="no"
            libzmq_werror="no"
        ;;
    esac

    PKGCFG_LIBS_PRIVATE="$PKGCFG_LIBS_PRIVATE $sodium_LIBS"
else
    AC_MSG_NOTICE([Using tweetnacl for CURVE security])
    AC_DEFINE(ZMQ_HAVE_CURVE, [1], [Using curve encryption])
    AC_DEFINE(ZMQ_USE_TWEETNACL, [1], [Using tweetnacl for curve encryption])
    curve_library="tweetnacl"
    enable_curve="yes"
fi

AM_CONDITIONAL(ENABLE_CURVE_KEYGEN, test "x$enable_curve" = "xyes" -a "x$zmq_enable_curve_keygen" = "xyes")

AM_CONDITIONAL(USE_LIBSODIUM, test "$curve_library" = "libsodium")
AM_CONDITIONAL(USE_TWEETNACL, test "$curve_library" = "tweetnacl")
AM_CONDITIONAL(HAVE_CURVE, test "x$curve_library" != "x")

# build using pgm
have_pgm_library="no"

AC_ARG_WITH([pgm], [AS_HELP_STRING([--with-pgm],
    [build libzmq with PGM extension. Requires pkg-config [default=no]])],
    [with_pgm_ext=$withval],
    [with_pgm_ext=no])

# conditionally require pgm package
if test "x$with_pgm_ext" != "xno"; then
    PKG_CHECK_MODULES([pgm], [openpgm-5.2 >= 5.2], [ have_pgm_library="yes" ],
        [PKG_CHECK_MODULES([pgm], [openpgm-5.1 >= 5.1],
            [ have_pgm_library="yes" ])])
fi

if test "x$have_pgm_library" = "xyes"; then
    AC_DEFINE(ZMQ_HAVE_OPENPGM, [1], [Have OpenPGM extension])
    PKGCFG_LIBS_PRIVATE="$PKGCFG_LIBS_PRIVATE $pgm_LIBS"
fi

AM_CONDITIONAL(HAVE_PGM, test "x$have_pgm_library" = "xyes")


# This uses "--with-norm" to point to the "norm" directory
# for "norm/include" and "norm/lib"
#(if "--with-norm=yes" is given, then assume installed on system)
AC_ARG_WITH([norm],
    [AS_HELP_STRING([--with-norm],
        [build libzmq with NORM protocol extension, optionally specifying norm path [default=no]])],
    [with_norm_ext=$withval],
    [with_norm_ext=no])

AC_MSG_CHECKING("with_norm_ext = ${with_norm_ext}")

if test "x$with_norm_ext" != "xno"; then
    PKG_CHECK_MODULES([norm], [norm], [ have_norm_library="yes" ], [
        AC_MSG_RESULT([yes])

        norm_LIBS=""
        norm_CFLAGS=""
        if test "x$with_norm_ext" != "xyes"; then
            norm_path="${with_norm_ext}"
            norm_CFLAGS="${norm_CFLAGS} -I${norm_path}/include"
            norm_LIBS="${norm_LIBS} -L${norm_path}/lib"
        fi
        norm_LIBS="${norm_LIBS} -lnorm"
        have_norm_library="yes"
        AC_SUBST(norm_LIBS)
        AC_SUBST(norm_CFLAGS)
    ])
else
    AC_MSG_RESULT([no])
fi
if test "x$have_norm_library" = "xyes"; then
    AC_DEFINE(ZMQ_HAVE_NORM, [1], [Have NORM protocol extension])
    PKGCFG_LIBS_PRIVATE="$PKGCFG_LIBS_PRIVATE $norm_LIBS"
fi
AM_CONDITIONAL(HAVE_NORM, test "x$have_norm_library" = "xyes")

# build using vmci
have_vmci_library="no"

AC_ARG_WITH([vmci], [AS_HELP_STRING([--with-vmci],
    [build libzmq with VMCI transport [default=no]])],
    [have_vmci_ext=$withval],
    [have_vmci_ext=no])

if test "x$have_vmci_ext" != "xno"; then
    AC_DEFINE(ZMQ_HAVE_VMCI, 1, [Have VMCI transport])

    if test "x$have_vmci_ext" != "xyes"; then
        vmci_path="${have_vmci_ext}"
        LIBZMQ_VMCI_CXXFLAGS="-I${vmci_path}"
        LIBZMQ_VMCI_LDFLAGS="-I${vmci_path}"
        LIBZMQ_EXTRA_CXXFLAGS="${LIBZMQ_VMCI_CXXFLAGS} ${LIBZMQ_EXTRA_CXXFLAGS}"
        LIBZMQ_EXTRA_LDFLAGS="${LIBZMQ_VMCI_LDFLAGS} ${LIBZMQ_EXTRA_LDFLAGS}"
    fi
fi

AM_CONDITIONAL(HAVE_VMCI, test "x$have_vmci_ext" != "xno")

# Set -Wall, -Werror and -pedantic
AC_LANG_PUSH([C++])

# Check how to enable -Wall
LIBZMQ_LANG_WALL([CPPFLAGS="$libzmq_cv_[]_AC_LANG_ABBREV[]_wall_flag $CPPFLAGS"])

if test "x$libzmq_werror" = "xyes" -a "x$libzmq_cv_[]_AC_LANG_ABBREV[]_sun_studio_compiler" != "xyes"; then
    LIBZMQ_LANG_WERROR([CPPFLAGS="$libzmq_cv_[]_AC_LANG_ABBREV[]_werror_flag $CPPFLAGS"])
fi

if test "x$libzmq_pedantic" = "xyes"; then
    LIBZMQ_LANG_STRICT([CPPFLAGS="$libzmq_cv_[]_AC_LANG_ABBREV[]_strict_flag $CPPFLAGS"])
fi
AC_LANG_POP([C++])

AM_CONDITIONAL(BUILD_TIPC, test "x$libzmq_tipc_support" = "xyes")
AM_CONDITIONAL(ON_MINGW, test "x$libzmq_on_mingw" = "xyes")
AM_CONDITIONAL(ON_CYGWIN, test "x$libzmq_on_cygwin" = "xyes")
AM_CONDITIONAL(ON_ANDROID, test "x$libzmq_on_android" = "xyes")
AM_CONDITIONAL(ON_LINUX, test "x$libzmq_on_linux" = "xyes")
AM_CONDITIONAL(ON_GNU, test "x$libzmq_on_gnu" = "xyes")

# Check for __atomic_Xxx compiler intrinsics
AC_LANG_PUSH([C++])
LIBZMQ_CHECK_ATOMIC_INTRINSICS([
    AC_DEFINE([ZMQ_HAVE_ATOMIC_INTRINSICS],
              [1],
              [Whether compiler has __atomic_Xxx intrinsics.])
    ])
AC_LANG_POP([C++])

# Checks for library functions.
AC_TYPE_SIGNAL
AC_CHECK_FUNCS(perror gettimeofday clock_gettime memset socket getifaddrs freeifaddrs fork posix_memalign mkdtemp)
AC_CHECK_HEADERS([alloca.h])

# pthread_setname is non-posix, and there are at least 4 different implementations
AC_MSG_CHECKING([whether signature of pthread_setname_np() has 1 argument])
AC_COMPILE_IFELSE(
	[AC_LANG_PROGRAM(
		[[#include <pthread.h>]],
		[[pthread_setname_np ("foo"); return 0;]])
	],[
		AC_MSG_RESULT([yes])
		AC_DEFINE(ZMQ_HAVE_PTHREAD_SETNAME_1, [1],
		    [Whether pthread_setname_np() has 1 argument])
	],[
		AC_MSG_RESULT([no])
])
AC_MSG_CHECKING([whether signature of pthread_setname_np() has 2 arguments])
AC_COMPILE_IFELSE(
	[AC_LANG_PROGRAM(
		[[#include <pthread.h>]],
		[[pthread_setname_np (pthread_self (), "foo"); return 0;]])
	],[
		AC_MSG_RESULT([yes])
		AC_DEFINE(ZMQ_HAVE_PTHREAD_SETNAME_2, [1],
		    [Whether pthread_setname_np() has 2 arguments])
	],[
		AC_MSG_RESULT([no])
])
AC_MSG_CHECKING([whether signature of pthread_setname_np() has 3 arguments])
AC_COMPILE_IFELSE(
	[AC_LANG_PROGRAM(
		[[#include <pthread.h>]],
		[[pthread_setname_np (pthread_self(), "foo", (void *)0); return 0;]])
	],[
		AC_MSG_RESULT([yes])
		AC_DEFINE(ZMQ_HAVE_PTHREAD_SETNAME_3, [1],
		    [Whether pthread_setname_np() has 3 arguments])
	],[
		AC_MSG_RESULT([no])
])
AC_MSG_CHECKING([whether pthread_set_name_np() exists])
AC_COMPILE_IFELSE(
	[AC_LANG_PROGRAM(
		[[#include <pthread.h>]],
		[[pthread_set_name_np (pthread_self(), "foo"); return 0;]])
	],[
		AC_MSG_RESULT([yes])
		AC_DEFINE(ZMQ_HAVE_PTHREAD_SET_NAME, [1],
		    [Whether pthread_set_name_np() exists])
	],[
		AC_MSG_RESULT([no])
])


# pthread_setaffinity_np is non-posix:
AC_MSG_CHECKING([whether pthread_setaffinity_np() exists])
AC_COMPILE_IFELSE(
	[AC_LANG_PROGRAM(
		[[#include <pthread.h>]],
		[[cpu_set_t test; pthread_setaffinity_np (pthread_self(), sizeof(cpu_set_t), &test); return 0;]])
	],[
		AC_MSG_RESULT([yes])
		AC_DEFINE(ZMQ_HAVE_PTHREAD_SET_AFFINITY, [1],
		    [Whether pthread_setaffinity_np() exists])
	],[
		AC_MSG_RESULT([no])
])


LIBZMQ_CHECK_SOCK_CLOEXEC([
    AC_DEFINE([ZMQ_HAVE_SOCK_CLOEXEC],
        [1],
        [Whether SOCK_CLOEXEC is defined and functioning.])
    ])

LIBZMQ_CHECK_O_CLOEXEC([
    AC_DEFINE([ZMQ_HAVE_O_CLOEXEC],
        [1],
        [Whether O_CLOEXEC is defined and functioning.])
    ])

LIBZMQ_CHECK_SO_BINDTODEVICE([
    AC_DEFINE([ZMQ_HAVE_SO_BINDTODEVICE],
        [1],
        [Whether SO_BINDTODEVICE is supported.])
    ])

# TCP keep-alives Checks.
LIBZMQ_CHECK_SO_KEEPALIVE([
    AC_DEFINE([ZMQ_HAVE_SO_KEEPALIVE],
        [1],
        [Whether SO_KEEPALIVE is supported.])
    ])

LIBZMQ_CHECK_TCP_KEEPCNT([
    AC_DEFINE([ZMQ_HAVE_TCP_KEEPCNT],
        [1],
        [Whether TCP_KEEPCNT is supported.])
    ])

LIBZMQ_CHECK_TCP_KEEPIDLE([
    AC_DEFINE([ZMQ_HAVE_TCP_KEEPIDLE],
        [1],
        [Whether TCP_KEEPIDLE is supported.])
    ])

LIBZMQ_CHECK_TCP_KEEPINTVL([
    AC_DEFINE([ZMQ_HAVE_TCP_KEEPINTVL],
        [1],
        [Whether TCP_KEEPINTVL is supported.])
    ])

LIBZMQ_CHECK_TCP_KEEPALIVE([
    AC_DEFINE([ZMQ_HAVE_TCP_KEEPALIVE],
        [1],
        [Whether TCP_KEEPALIVE is supported.])
    ])

LIBZMQ_CHECK_GETRANDOM([
    AC_DEFINE([ZMQ_HAVE_GETRANDOM],
        [1],
        [Whether getrandom is supported.])
    ])

AM_CONDITIONAL(HAVE_FORK, test "x$ac_cv_func_fork" = "xyes")

if test "x$cross_compiling" = "xyes"; then
    #   Enable draft by default when cross-compiling
    defaultval=yes
else
    # enable draft API by default if we're in a git repository
    # else disable it by default; then allow --enable-drafts=yes/no override
    AC_CHECK_FILE($srcdir/.git, [defaultval=yes], [defaultval=no])
fi

AC_ARG_ENABLE([drafts],
    AS_HELP_STRING([--enable-drafts],
        [Build and install draft classes and methods [default=yes]]),
    [enable_drafts=$enableval],
    [enable_drafts=$defaultval])

AM_CONDITIONAL([ENABLE_DRAFTS], [test x$enable_drafts != xno])

if test "x$enable_drafts" = "xyes"; then
    AC_MSG_NOTICE([Building stable and legacy API + draft API])
    AC_DEFINE(ZMQ_BUILD_DRAFT_API, 1, [Provide draft classes and methods])
    AC_SUBST(pkg_config_defines, "-DZMQ_BUILD_DRAFT_API=1")
else
    AC_MSG_NOTICE([Building stable and legacy API (no draft API)])
    AC_SUBST(pkg_config_defines, "")
fi

AC_ARG_ENABLE([libunwind],
    [AS_HELP_STRING([--enable-libunwind],
        [enable libunwind [default=auto]])],
    [enable_libunwind=$enableval],
    [enable_libunwind="auto"])

if test "x$enable_libunwind" != "xno"; then
    PKG_CHECK_MODULES(LIBUNWIND, [libunwind],
        [
            AC_DEFINE(HAVE_LIBUNWIND, 1, [The libunwind library is to be used])
            AC_SUBST([LIBUNWIND_CFLAGS])
            AC_SUBST([LIBUNWIND_LIBS])
            AC_CHECK_LIB([dl], [dladdr])
        ],
        [
            if test "x$enable_libunwind" = "xyes"; then
                AC_MSG_ERROR([Cannot find libunwind])
            else
                AC_MSG_WARN([Cannot find libunwind])
            fi
        ])
fi

# Subst LIBZMQ_EXTRA_CFLAGS & CXXFLAGS & LDFLAGS
AC_SUBST(LIBZMQ_EXTRA_CFLAGS)
AC_SUBST(LIBZMQ_EXTRA_CXXFLAGS)
AC_SUBST(LIBZMQ_EXTRA_LDFLAGS)

AC_SUBST(LIBZMQ_VMCI_CXXFLAGS)
AC_SUBST(LIBZMQ_VMCI_LDFLAGS)

AC_SUBST(pkg_config_libs_private, $PKGCFG_LIBS_PRIVATE)

# set pkgconfigdir, allow override
AC_ARG_WITH([pkgconfigdir],
    AS_HELP_STRING([--with-pkgconfigdir=PATH],
        [Path to the pkgconfig directory [[LIBDIR/pkgconfig]]]),
    [pkgconfigdir="$withval"],
    [pkgconfigdir='${libdir}/pkgconfig'])
AC_SUBST([pkgconfigdir])

AC_CONFIG_FILES([ \
    Makefile \
    src/libzmq.pc \
    doc/Makefile \
    builds/Makefile \
    builds/msvc/Makefile])

AC_OUTPUT