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      1 AC_PREREQ(2.57)
      2 
      3 dnl Version not hardcoded here. Fetched later from ares_version.h
      4 AC_INIT([c-ares], [1.7.5],
      5   [c-ares mailing list: http://cool.haxx.se/mailman/listinfo/c-ares])
      6 
      7 CARES_OVERRIDE_AUTOCONF
      8 
      9 AC_CONFIG_SRCDIR([ares_ipv6.h])
     10 AM_CONFIG_HEADER([ares_config.h ares_build.h])
     11 AC_CONFIG_MACRO_DIR([m4])
     12 AM_MAINTAINER_MODE
     13 
     14 CARES_CHECK_OPTION_DEBUG
     15 CARES_CHECK_OPTION_OPTIMIZE
     16 CARES_CHECK_OPTION_WARNINGS
     17 CARES_CHECK_OPTION_WERROR
     18 CARES_CHECK_OPTION_CURLDEBUG
     19 CARES_CHECK_OPTION_SYMBOL_HIDING
     20 
     21 CARES_CHECK_PATH_SEPARATOR_REQUIRED
     22 
     23 dnl SED is mandatory for configure process and libtool.
     24 dnl Set it now, allowing it to be changed later.
     25 AC_PATH_PROG([SED], [sed], [not_found],
     26   [$PATH:/usr/bin:/usr/local/bin])
     27 if test -z "$SED" || test "$SED" = "not_found"; then
     28   AC_MSG_ERROR([sed not found in PATH. Cannot continue without sed.])
     29 fi
     30 AC_SUBST([SED])
     31 
     32 dnl GREP is mandatory for configure process and libtool.
     33 dnl Set it now, allowing it to be changed later.
     34 AC_PATH_PROG([GREP], [grep], [not_found],
     35   [$PATH:/usr/bin:/usr/local/bin])
     36 if test -z "$GREP" || test "$GREP" = "not_found"; then
     37   AC_MSG_ERROR([grep not found in PATH. Cannot continue without grep.])
     38 fi
     39 AC_SUBST([GREP])
     40 
     41 dnl EGREP is mandatory for configure process and libtool.
     42 dnl Set it now, allowing it to be changed later.
     43 if echo a | ($GREP -E '(a|b)') >/dev/null 2>&1; then
     44   AC_MSG_CHECKING([for egrep])
     45   EGREP="$GREP -E"
     46   AC_MSG_RESULT([$EGREP])
     47 else
     48   AC_PATH_PROG([EGREP], [egrep], [not_found],
     49     [$PATH:/usr/bin:/usr/local/bin])
     50 fi
     51 if test -z "$EGREP" || test "$EGREP" = "not_found"; then
     52   AC_MSG_ERROR([egrep not found in PATH. Cannot continue without egrep.])
     53 fi
     54 AC_SUBST([EGREP])
     55 
     56 dnl AR is mandatory for configure process and libtool.
     57 dnl This is target dependent, so check it as a tool.
     58 AC_PATH_TOOL([AR], [ar], [not_found],
     59   [$PATH:/usr/bin:/usr/local/bin])
     60 if test -z "$AR" || test "$AR" = "not_found"; then
     61   AC_MSG_ERROR([ar not found in PATH. Cannot continue without ar.])
     62 fi
     63 AC_SUBST([AR])
     64 
     65 dnl Remove non-configure distributed ares_build.h
     66 if test -f ${srcdir}/ares_build.h; then
     67   rm -f ${srcdir}/ares_build.h
     68 fi
     69 
     70 AM_INIT_AUTOMAKE
     71 
     72 dnl
     73 dnl Detect the canonical host and target build environment
     74 dnl
     75 
     76 AC_CANONICAL_HOST
     77 dnl Get system canonical name
     78 AC_DEFINE_UNQUOTED(OS, "${host}", [cpu-machine-OS])
     79 
     80 CARES_CHECK_PROG_CC
     81 AM_PROG_CC_C_O
     82 AC_PROG_INSTALL
     83 
     84 dnl This defines _ALL_SOURCE for AIX
     85 CARES_CHECK_AIX_ALL_SOURCE
     86 
     87 dnl Our configure and build reentrant settings
     88 CARES_CONFIGURE_THREAD_SAFE
     89 CARES_CONFIGURE_REENTRANT
     90 
     91 dnl check for how to do large files
     92 AC_SYS_LARGEFILE
     93 
     94 case $host_os in
     95   solaris*)
     96     AC_DEFINE(ETC_INET, 1, [if a /etc/inet dir is being used])
     97     ;;
     98 esac
     99 
    100 dnl support building of Windows DLLs
    101 AC_LIBTOOL_WIN32_DLL
    102 
    103 dnl force libtool to build static libraries with PIC on AMD64-Linux & FreeBSD
    104 AC_MSG_CHECKING([if arch-OS host is AMD64-Linux/FreeBSD (to build static libraries with PIC)])
    105 case $host in
    106   x86_64*linux*|amd64*freebsd*|ia64*freebsd*)
    107     AC_MSG_RESULT([yes])
    108     with_pic=yes
    109     ;;
    110   *)
    111     AC_MSG_RESULT([no])
    112     ;;
    113 esac
    114 
    115 AC_MSG_CHECKING([if compiler is icc (to build with PIC)])
    116 case $CC in
    117   icc | */icc)
    118     AC_MSG_RESULT([yes])
    119     with_pic=yes
    120     ;;
    121   *)
    122     AC_MSG_RESULT([no])
    123     ;;
    124 esac
    125 
    126 dnl libtool setup
    127 AC_PROG_LIBTOOL
    128 
    129 AC_MSG_CHECKING([if we need CARES_BUILDING_LIBRARY])
    130 case $host in
    131   *-*-mingw*)
    132     AC_DEFINE(CARES_BUILDING_LIBRARY, 1, [when building c-ares library])
    133     AC_MSG_RESULT(yes)
    134     AC_MSG_CHECKING([if we need CARES_STATICLIB])
    135     if test "X$enable_shared" = "Xno"
    136     then
    137       AC_DEFINE(CARES_STATICLIB, 1, [when not building a shared library])
    138       AC_MSG_RESULT(yes)
    139     else
    140       AC_MSG_RESULT(no)
    141     fi
    142     ;;
    143   *)
    144     AC_MSG_RESULT(no)
    145     ;;
    146 esac
    147 
    148 dnl **********************************************************************
    149 dnl platform/compiler/architecture specific checks/flags
    150 dnl **********************************************************************
    151 
    152 CARES_CHECK_COMPILER
    153 CARES_SET_COMPILER_BASIC_OPTS
    154 CARES_SET_COMPILER_DEBUG_OPTS
    155 CARES_SET_COMPILER_OPTIMIZE_OPTS
    156 CARES_SET_COMPILER_WARNING_OPTS
    157 
    158 if test "$compiler_id" = "INTEL_UNIX_C"; then
    159   #
    160   if test "$compiler_num" -ge "1000"; then
    161     dnl icc 10.X or later
    162     CFLAGS="$CFLAGS -shared-intel"
    163   elif test "$compiler_num" -ge "900"; then
    164     dnl icc 9.X specific
    165     CFLAGS="$CFLAGS -i-dynamic"
    166   fi
    167   #
    168 fi
    169 
    170 CARES_CHECK_COMPILER_HALT_ON_ERROR
    171 CARES_CHECK_COMPILER_ARRAY_SIZE_NEGATIVE
    172 CARES_CHECK_COMPILER_SYMBOL_HIDING
    173 
    174 CARES_CHECK_NO_UNDEFINED
    175 AM_CONDITIONAL(NO_UNDEFINED, test x$need_no_undefined = xyes)
    176 
    177 CARES_CHECK_CURLDEBUG
    178 AM_CONDITIONAL(CURLDEBUG, test x$want_curldebug = xyes)
    179 
    180 dnl **********************************************************************
    181 dnl Compilation based checks should not be done before this point.
    182 dnl **********************************************************************
    183 
    184 dnl **********************************************************************
    185 dnl Make sure that our checks for headers windows.h winsock.h winsock2.h 
    186 dnl and ws2tcpip.h take precedence over any other further checks which 
    187 dnl could be done later using AC_CHECK_HEADER or AC_CHECK_HEADERS for
    188 dnl this specific header files. And do them before its results are used.
    189 dnl **********************************************************************
    190 
    191 CURL_CHECK_HEADER_WINDOWS
    192 CURL_CHECK_NATIVE_WINDOWS
    193 case X-"$ac_cv_native_windows" in
    194   X-yes)
    195     CURL_CHECK_HEADER_WINSOCK
    196     CURL_CHECK_HEADER_WINSOCK2
    197     CURL_CHECK_HEADER_WS2TCPIP
    198     ;;
    199   *)
    200     ac_cv_header_winsock_h="no"
    201     ac_cv_header_winsock2_h="no"
    202     ac_cv_header_ws2tcpip_h="no"
    203     ;;
    204 esac
    205 
    206 dnl **********************************************************************
    207 dnl Checks for libraries.
    208 dnl **********************************************************************
    209 
    210 CARES_CHECK_LIB_XNET
    211 
    212 dnl gethostbyname without lib or in the nsl lib?
    213 AC_CHECK_FUNC(gethostbyname,
    214               [HAVE_GETHOSTBYNAME="1"
    215               ],
    216               [ AC_CHECK_LIB(nsl, gethostbyname,
    217                              [HAVE_GETHOSTBYNAME="1"
    218                              LIBS="$LIBS -lnsl"
    219                              ])
    220               ])
    221 
    222 if test "$HAVE_GETHOSTBYNAME" != "1"
    223 then
    224   dnl gethostbyname in the socket lib?
    225   AC_CHECK_LIB(socket, gethostbyname,
    226                [HAVE_GETHOSTBYNAME="1"
    227                LIBS="$LIBS -lsocket"
    228                ])
    229 fi
    230 
    231 dnl At least one system has been identified to require BOTH nsl and socket
    232 dnl libs at the same time to link properly.
    233 if test "$HAVE_GETHOSTBYNAME" != "1"
    234 then
    235   AC_MSG_CHECKING([for gethostbyname with both nsl and socket libs])
    236   my_ac_save_LIBS=$LIBS
    237   LIBS="-lnsl -lsocket $LIBS"
    238   AC_LINK_IFELSE([
    239     AC_LANG_PROGRAM([[
    240     ]],[[
    241       gethostbyname();
    242     ]])
    243   ],[
    244     AC_MSG_RESULT([yes])
    245     HAVE_GETHOSTBYNAME="1"
    246   ],[
    247     AC_MSG_RESULT([no])
    248     LIBS=$my_ac_save_LIBS
    249   ])
    250 fi
    251 
    252 if test "$HAVE_GETHOSTBYNAME" != "1"
    253 then
    254   dnl This is for winsock systems
    255   if test "$ac_cv_header_windows_h" = "yes"; then
    256     if test "$ac_cv_header_winsock_h" = "yes"; then
    257       case $host in
    258         *-*-mingw32ce*)
    259           winsock_LIB="-lwinsock"
    260           ;;
    261         *)
    262           winsock_LIB="-lwsock32"
    263           ;;
    264       esac
    265     fi
    266     if test "$ac_cv_header_winsock2_h" = "yes"; then
    267       winsock_LIB="-lws2_32"
    268     fi
    269     if test ! -z "$winsock_LIB"; then
    270       my_ac_save_LIBS=$LIBS
    271       LIBS="$winsock_LIB $LIBS"
    272       AC_MSG_CHECKING([for gethostbyname in $winsock_LIB])
    273       AC_LINK_IFELSE([
    274         AC_LANG_PROGRAM([[
    275 #ifdef HAVE_WINDOWS_H
    276 #ifndef WIN32_LEAN_AND_MEAN
    277 #define WIN32_LEAN_AND_MEAN
    278 #endif
    279 #include <windows.h>
    280 #ifdef HAVE_WINSOCK2_H
    281 #include <winsock2.h>
    282 #else
    283 #ifdef HAVE_WINSOCK_H
    284 #include <winsock.h>
    285 #endif
    286 #endif
    287 #endif
    288         ]],[[
    289           gethostbyname("www.dummysite.com");
    290         ]])
    291       ],[
    292         AC_MSG_RESULT([yes])
    293         HAVE_GETHOSTBYNAME="1"
    294       ],[
    295         AC_MSG_RESULT([no])
    296         winsock_LIB=""
    297         LIBS=$my_ac_save_LIBS
    298       ])
    299     fi
    300   fi
    301 fi
    302 
    303 if test "$HAVE_GETHOSTBYNAME" != "1"
    304 then
    305   dnl This is for Minix 3.1
    306   AC_MSG_CHECKING([for gethostbyname for Minix 3])
    307   AC_LINK_IFELSE([
    308     AC_LANG_PROGRAM([[
    309 /* Older Minix versions may need <net/gen/netdb.h> here instead */
    310 #include <netdb.h>
    311     ]],[[
    312       gethostbyname("www.dummysite.com");
    313     ]])
    314   ],[
    315     AC_MSG_RESULT([yes])
    316     HAVE_GETHOSTBYNAME="1"
    317   ],[
    318     AC_MSG_RESULT([no])
    319   ])
    320 fi
    321 
    322 if test "$HAVE_GETHOSTBYNAME" != "1"
    323 then
    324   dnl This is for eCos with a stubbed DNS implementation
    325   AC_MSG_CHECKING([for gethostbyname for eCos])
    326   AC_LINK_IFELSE([
    327     AC_LANG_PROGRAM([[
    328 #include <stdio.h>
    329 #include <netdb.h>
    330     ]],[[
    331       gethostbyname("www.dummysite.com");
    332     ]])
    333   ],[
    334     AC_MSG_RESULT([yes])
    335     HAVE_GETHOSTBYNAME="1"
    336   ],[
    337     AC_MSG_RESULT([no])
    338   ])
    339 fi
    340 
    341 if test "$HAVE_GETHOSTBYNAME" != "1"
    342 then
    343   dnl gethostbyname in the net lib - for BeOS
    344   AC_CHECK_LIB(net, gethostbyname,
    345                [HAVE_GETHOSTBYNAME="1"
    346                LIBS="$LIBS -lnet"
    347                ])
    348 fi
    349 
    350 
    351 if test "$HAVE_GETHOSTBYNAME" != "1"; then
    352   AC_MSG_ERROR([couldn't find libraries for gethostbyname()])
    353 fi
    354 
    355 dnl resolve lib?
    356 AC_CHECK_FUNC(strcasecmp, , [ AC_CHECK_LIB(resolve, strcasecmp) ])
    357 
    358 if test "$ac_cv_lib_resolve_strcasecmp" = "$ac_cv_func_strcasecmp"; then
    359   AC_CHECK_LIB(resolve, strcasecmp,
    360               [LIBS="-lresolve $LIBS"],
    361                ,
    362                -lnsl)
    363 fi
    364 ac_cv_func_strcasecmp="no"
    365 
    366 CARES_CHECK_LIBS_CONNECT
    367 
    368 dnl **********************************************************************
    369 dnl In case that function clock_gettime with monotonic timer is available,
    370 dnl check for additional required libraries.
    371 dnl **********************************************************************
    372 CURL_CHECK_LIBS_CLOCK_GETTIME_MONOTONIC
    373 
    374 AC_MSG_CHECKING([whether to use libgcc])
    375 AC_ARG_ENABLE(libgcc,
    376 AC_HELP_STRING([--enable-libgcc],[use libgcc when linking]),
    377 [ case "$enableval" in
    378   yes)
    379         LIBS="$LIBS -lgcc"
    380        AC_MSG_RESULT(yes)
    381        ;;
    382   *)   AC_MSG_RESULT(no)
    383        ;;
    384   esac ],
    385        AC_MSG_RESULT(no)
    386 )
    387 
    388 
    389 dnl Let's hope this split URL remains working:
    390 dnl http://publibn.boulder.ibm.com/doc_link/en_US/a_doc_lib/aixprggd/ \
    391 dnl genprogc/thread_quick_ref.htm
    392 
    393 
    394 dnl **********************************************************************
    395 dnl Back to "normal" configuring
    396 dnl **********************************************************************
    397 
    398 dnl Checks for header files.
    399 AC_HEADER_STDC
    400 
    401 CURL_CHECK_HEADER_MALLOC
    402 CURL_CHECK_HEADER_MEMORY
    403 
    404 dnl check for a few basic system headers we need
    405 AC_CHECK_HEADERS(
    406        sys/types.h \
    407        sys/time.h \
    408        sys/select.h \
    409        sys/socket.h \
    410        sys/ioctl.h \
    411        sys/param.h \
    412        sys/uio.h \
    413        assert.h \
    414        netdb.h \
    415        netinet/in.h \
    416        netinet/tcp.h \
    417        net/if.h \
    418        errno.h \
    419        socket.h \
    420        strings.h \
    421        stdbool.h \
    422        time.h \
    423        limits.h \
    424        arpa/nameser.h \
    425        arpa/nameser_compat.h \
    426        arpa/inet.h,
    427 dnl to do if not found
    428 [],
    429 dnl to do if found
    430 [],
    431 dnl default includes
    432 [
    433 #ifdef HAVE_SYS_TYPES_H
    434 #include <sys/types.h>
    435 #endif
    436 #ifdef HAVE_SYS_TIME_H
    437 #include <sys/time.h>
    438 #endif
    439 dnl We do this default-include simply to make sure that the nameser_compat.h
    440 dnl header *REALLY* can be include after the new nameser.h. It seems AIX 5.1
    441 dnl (and others?) is not designed to allow this.
    442 #ifdef HAVE_ARPA_NAMESER_H
    443 #include <arpa/nameser.h>
    444 #endif
    445 
    446 dnl *Sigh* these are needed in order for net/if.h to get properly detected.
    447 #ifdef HAVE_SYS_SOCKET_H
    448 #include <sys/socket.h>
    449 #endif
    450 #ifdef HAVE_NETINET_IN_H
    451 #include <netinet/in.h>
    452 #endif
    453 ]
    454 )
    455 
    456 dnl Checks for typedefs, structures, and compiler characteristics.
    457 AC_C_CONST
    458 AC_TYPE_SIZE_T
    459 AC_HEADER_TIME
    460 CURL_CHECK_STRUCT_TIMEVAL
    461 
    462 AC_CHECK_SIZEOF(size_t)
    463 AC_CHECK_SIZEOF(int)
    464 AC_CHECK_SIZEOF(long)
    465 CARES_CONFIGURE_LONG
    466 AC_CHECK_SIZEOF(time_t)
    467 
    468 AC_CHECK_TYPE(long long,
    469    [AC_DEFINE(HAVE_LONGLONG, 1,
    470      [Define to 1 if the compiler supports the 'long long' data type.])]
    471    longlong="yes"  
    472 )
    473 
    474 if test "xyes" = "x$longlong"; then
    475   AC_MSG_CHECKING([if numberLL works])
    476   AC_COMPILE_IFELSE([
    477     AC_LANG_PROGRAM([[
    478     ]],[[
    479       long long val = 1000LL;
    480     ]])
    481   ],[
    482     AC_MSG_RESULT([yes])
    483     AC_DEFINE(HAVE_LL, 1, [if your compiler supports LL])
    484   ],[
    485     AC_MSG_RESULT([no])
    486   ])
    487 fi
    488 
    489 
    490 # check for ssize_t
    491 AC_CHECK_TYPE(ssize_t, ,
    492    AC_DEFINE(ssize_t, int, [the signed version of size_t]))
    493 
    494 # check for bool type
    495 AC_CHECK_TYPE([bool],[
    496   AC_DEFINE(HAVE_BOOL_T, 1,
    497     [Define to 1 if bool is an available type.])
    498 ], ,[
    499 #ifdef HAVE_SYS_TYPES_H
    500 #include <sys/types.h>
    501 #endif
    502 #ifdef HAVE_STDBOOL_H
    503 #include <stdbool.h>
    504 #endif
    505 ])
    506 
    507 CARES_CONFIGURE_ARES_SOCKLEN_T
    508 
    509 TYPE_IN_ADDR_T
    510 
    511 TYPE_SOCKADDR_STORAGE
    512 
    513 TYPE_SIG_ATOMIC_T
    514 
    515 AC_TYPE_SIGNAL
    516 
    517 CURL_CHECK_FUNC_RECV
    518 CURL_CHECK_FUNC_RECVFROM
    519 CURL_CHECK_FUNC_SEND
    520 CURL_CHECK_MSG_NOSIGNAL
    521 
    522 CARES_CHECK_FUNC_CLOSESOCKET
    523 CARES_CHECK_FUNC_CLOSESOCKET_CAMEL
    524 CARES_CHECK_FUNC_CONNECT
    525 CARES_CHECK_FUNC_FCNTL
    526 CARES_CHECK_FUNC_FREEADDRINFO
    527 CARES_CHECK_FUNC_GETADDRINFO
    528 CARES_CHECK_FUNC_GETENV
    529 CARES_CHECK_FUNC_GETHOSTBYADDR
    530 CARES_CHECK_FUNC_GETHOSTBYNAME
    531 CARES_CHECK_FUNC_GETHOSTNAME
    532 CARES_CHECK_FUNC_GETSERVBYPORT_R
    533 CARES_CHECK_FUNC_INET_NET_PTON
    534 CARES_CHECK_FUNC_INET_NTOP
    535 CARES_CHECK_FUNC_INET_PTON
    536 CARES_CHECK_FUNC_IOCTL
    537 CARES_CHECK_FUNC_IOCTLSOCKET
    538 CARES_CHECK_FUNC_IOCTLSOCKET_CAMEL
    539 CARES_CHECK_FUNC_SETSOCKOPT
    540 CARES_CHECK_FUNC_SOCKET
    541 CARES_CHECK_FUNC_STRCASECMP
    542 CARES_CHECK_FUNC_STRCMPI
    543 CARES_CHECK_FUNC_STRDUP
    544 CARES_CHECK_FUNC_STRICMP
    545 CARES_CHECK_FUNC_STRNCASECMP
    546 CARES_CHECK_FUNC_STRNCMPI
    547 CARES_CHECK_FUNC_STRNICMP
    548 CARES_CHECK_FUNC_WRITEV
    549 
    550 
    551 dnl check for AF_INET6
    552 CARES_CHECK_CONSTANT(
    553   [
    554 #undef inline
    555 #ifdef HAVE_WINDOWS_H
    556 #ifndef WIN32_LEAN_AND_MEAN
    557 #define WIN32_LEAN_AND_MEAN
    558 #endif
    559 #include <windows.h>
    560 #ifdef HAVE_WINSOCK2_H
    561 #include <winsock2.h>
    562 #endif
    563 #else
    564 #ifdef HAVE_SYS_TYPES_H
    565 #include <sys/types.h>
    566 #endif
    567 #ifdef HAVE_SYS_SOCKET_H
    568 #include <sys/socket.h>
    569 #endif
    570 #endif
    571   ], [PF_INET6], 
    572      AC_DEFINE_UNQUOTED(HAVE_PF_INET6,1,[Define to 1 if you have PF_INET6.])
    573 )
    574 
    575 dnl check for PF_INET6
    576 CARES_CHECK_CONSTANT(
    577   [
    578 #undef inline
    579 #ifdef HAVE_WINDOWS_H
    580 #ifndef WIN32_LEAN_AND_MEAN
    581 #define WIN32_LEAN_AND_MEAN
    582 #endif
    583 #include <windows.h>
    584 #ifdef HAVE_WINSOCK2_H
    585 #include <winsock2.h>
    586 #endif
    587 #else
    588 #ifdef HAVE_SYS_TYPES_H
    589 #include <sys/types.h>
    590 #endif
    591 #ifdef HAVE_SYS_SOCKET_H
    592 #include <sys/socket.h>
    593 #endif
    594 #endif
    595   ], [AF_INET6], 
    596      AC_DEFINE_UNQUOTED(HAVE_AF_INET6,1,[Define to 1 if you have AF_INET6.])
    597 )
    598 
    599 
    600 dnl check for the in6_addr structure
    601 CARES_CHECK_STRUCT(
    602   [
    603 #undef inline
    604 #ifdef HAVE_WINDOWS_H
    605 #ifndef WIN32_LEAN_AND_MEAN
    606 #define WIN32_LEAN_AND_MEAN
    607 #endif
    608 #include <windows.h>
    609 #ifdef HAVE_WINSOCK2_H
    610 #include <winsock2.h>
    611 #ifdef HAVE_WS2TCPIP_H
    612 #include <ws2tcpip.h>
    613 #endif
    614 #endif
    615 #else
    616 #ifdef HAVE_SYS_TYPES_H
    617 #include <sys/types.h>
    618 #endif
    619 #ifdef HAVE_NETINET_IN_H
    620 #include <netinet/in.h>
    621 #endif
    622 #endif
    623   ], [in6_addr], 
    624      AC_DEFINE_UNQUOTED(HAVE_STRUCT_IN6_ADDR,1,[Define to 1 if you have struct in6_addr.])
    625 )
    626 
    627 dnl check for the sockaddr_in6 structure
    628 CARES_CHECK_STRUCT(
    629   [
    630 #undef inline
    631 #ifdef HAVE_WINDOWS_H
    632 #ifndef WIN32_LEAN_AND_MEAN
    633 #define WIN32_LEAN_AND_MEAN
    634 #endif
    635 #include <windows.h>
    636 #ifdef HAVE_WINSOCK2_H
    637 #include <winsock2.h>
    638 #ifdef HAVE_WS2TCPIP_H
    639 #include <ws2tcpip.h>
    640 #endif
    641 #endif
    642 #else
    643 #ifdef HAVE_SYS_TYPES_H
    644 #include <sys/types.h>
    645 #endif
    646 #ifdef HAVE_NETINET_IN_H
    647 #include <netinet/in.h>
    648 #endif
    649 #endif
    650   ], [sockaddr_in6], 
    651      AC_DEFINE_UNQUOTED(HAVE_STRUCT_SOCKADDR_IN6,1,
    652        [Define to 1 if you have struct sockaddr_in6.]) ac_have_sockaddr_in6=yes
    653 )
    654 
    655 AC_CHECK_MEMBER(struct sockaddr_in6.sin6_scope_id,
    656     AC_DEFINE_UNQUOTED(HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID,1,
    657       [Define to 1 if your struct sockaddr_in6 has sin6_scope_id.])
    658    , ,
    659   [
    660 #undef inline
    661 #ifdef HAVE_WINDOWS_H
    662 #ifndef WIN32_LEAN_AND_MEAN
    663 #define WIN32_LEAN_AND_MEAN
    664 #endif
    665 #include <windows.h>
    666 #ifdef HAVE_WINSOCK2_H
    667 #include <winsock2.h>
    668 #ifdef HAVE_WS2TCPIP_H
    669 #include <ws2tcpip.h>
    670 #endif
    671 #endif
    672 #else
    673 #ifdef HAVE_SYS_TYPES_H
    674 #include <sys/types.h>
    675 #endif
    676 #ifdef HAVE_NETINET_IN_H
    677 #include <netinet/in.h>
    678 #endif
    679 #endif
    680   ])
    681 
    682 dnl check for the addrinfo structure
    683 AC_CHECK_MEMBER(struct addrinfo.ai_flags,
    684      AC_DEFINE_UNQUOTED(HAVE_STRUCT_ADDRINFO,1,
    685        [Define to 1 if you have struct addrinfo.]),,
    686   [
    687 #undef inline
    688 #ifdef HAVE_WINDOWS_H
    689 #ifndef WIN32_LEAN_AND_MEAN
    690 #define WIN32_LEAN_AND_MEAN
    691 #endif
    692 #include <windows.h>
    693 #ifdef HAVE_WINSOCK2_H
    694 #include <winsock2.h>
    695 #ifdef HAVE_WS2TCPIP_H
    696 #include <ws2tcpip.h>
    697 #endif
    698 #endif
    699 #else
    700 #ifdef HAVE_SYS_TYPES_H
    701 #include <sys/types.h>
    702 #endif
    703 #ifdef HAVE_NETINET_IN_H
    704 #include <netinet/in.h>
    705 #endif
    706 #ifdef HAVE_SYS_SOCKET_H
    707 #include <sys/socket.h>
    708 #endif
    709 #ifdef HAVE_NETDB_H
    710 #include <netdb.h>
    711 #endif
    712 #endif
    713   ]
    714 )
    715 
    716 
    717 AC_CHECK_FUNCS([bitncmp \
    718   gettimeofday \
    719   if_indextoname
    720 ],[
    721 ],[
    722   func="$ac_func"
    723   AC_MSG_CHECKING([deeper for $func])
    724   AC_LINK_IFELSE([
    725     AC_LANG_PROGRAM([[
    726     ]],[[
    727       $func ();
    728     ]])
    729   ],[
    730     AC_MSG_RESULT([yes])
    731     eval "ac_cv_func_$func=yes"
    732     AC_DEFINE_UNQUOTED(XC_SH_TR_CPP([HAVE_$func]), [1],
    733       [Define to 1 if you have the $func function.])
    734   ],[
    735     AC_MSG_RESULT([but still no])
    736   ])
    737 ])
    738 
    739 
    740 AC_CHECK_SIZEOF(struct in6_addr, ,
    741 [
    742 #undef inline
    743 #ifdef HAVE_WINDOWS_H
    744 #ifndef WIN32_LEAN_AND_MEAN
    745 #define WIN32_LEAN_AND_MEAN
    746 #endif
    747 #include <windows.h>
    748 #ifdef HAVE_WINSOCK2_H
    749 #include <winsock2.h>
    750 #ifdef HAVE_WS2TCPIP_H
    751 #include <ws2tcpip.h>
    752 #endif
    753 #endif
    754 #else
    755 #ifdef HAVE_SYS_TYPES_H
    756 #include <sys/types.h>
    757 #endif
    758 #ifdef HAVE_SYS_SOCKET_H
    759 #include <sys/socket.h>
    760 #endif
    761 #ifdef HAVE_NETINET_IN_H
    762 #include <netinet/in.h>
    763 #endif
    764 #endif
    765 ]
    766 )
    767 
    768 AC_CHECK_SIZEOF(struct in_addr, ,
    769 [
    770 #undef inline
    771 #ifdef HAVE_WINDOWS_H
    772 #ifndef WIN32_LEAN_AND_MEAN
    773 #define WIN32_LEAN_AND_MEAN
    774 #endif
    775 #include <windows.h>
    776 #ifdef HAVE_WINSOCK2_H
    777 #include <winsock2.h>
    778 #ifdef HAVE_WS2TCPIP_H
    779 #include <ws2tcpip.h>
    780 #endif
    781 #endif
    782 #else
    783 #ifdef HAVE_SYS_TYPES_H
    784 #include <sys/types.h>
    785 #endif
    786 #ifdef HAVE_SYS_SOCKET_H
    787 #include <sys/socket.h>
    788 #endif
    789 #ifdef HAVE_NETINET_IN_H
    790 #include <netinet/in.h>
    791 #endif
    792 #endif
    793 ]
    794 )
    795 
    796 
    797 dnl Check if the getnameinfo function is available
    798 dnl and get the types of five of its arguments.
    799 CURL_CHECK_FUNC_GETNAMEINFO
    800 
    801 
    802 AC_C_BIGENDIAN(
    803     [AC_DEFINE(ARES_BIG_ENDIAN, 1,
    804       [define this if ares is built for a big endian system])],
    805     ,
    806     [AC_MSG_WARN([couldn't figure out endianess, assuming little endian!])]
    807 )
    808 
    809 dnl Check for user-specified random device
    810 AC_ARG_WITH(random,
    811 AC_HELP_STRING([--with-random=FILE],
    812                [read randomness from FILE (default=/dev/urandom)]),
    813     [ RANDOM_FILE="$withval" ],
    814     [
    815         dnl Check for random device.  If we're cross compiling, we can't
    816         dnl check, and it's better to assume it doesn't exist than it is
    817         dnl to fail on AC_CHECK_FILE or later.
    818         if test "$cross_compiling" = "no"; then
    819           AC_CHECK_FILE("/dev/urandom", [ RANDOM_FILE="/dev/urandom"] )
    820         else
    821           AC_MSG_WARN([cannot check for /dev/urandom while cross compiling; assuming none])
    822         fi
    823         
    824     ]
    825 )
    826 if test -n "$RANDOM_FILE" && test X"$RANDOM_FILE" != Xno ; then
    827         AC_SUBST(RANDOM_FILE)
    828         AC_DEFINE_UNQUOTED(RANDOM_FILE, "$RANDOM_FILE",
    829         [a suitable file/device to read random data from])
    830 fi
    831 
    832 CARES_CHECK_OPTION_NONBLOCKING
    833 CARES_CHECK_NONBLOCKING_SOCKET
    834 
    835 CARES_CONFIGURE_SYMBOL_HIDING
    836 
    837 CARES_PRIVATE_LIBS="$LIBS"
    838 AC_SUBST(CARES_PRIVATE_LIBS)
    839 
    840 CARES_CFLAG_EXTRAS=""
    841 if test X"$want_werror" = Xyes; then
    842   CARES_CFLAG_EXTRAS="-Werror"
    843 fi
    844 AC_SUBST(CARES_CFLAG_EXTRAS)
    845 
    846 dnl squeeze whitespace out of some variables
    847 
    848 squeeze CFLAGS
    849 squeeze CPPFLAGS
    850 squeeze DEFS
    851 squeeze LDFLAGS
    852 squeeze LIBS
    853 
    854 squeeze CARES_PRIVATE_LIBS
    855 
    856 AC_CONFIG_FILES([Makefile libcares.pc])
    857 AC_OUTPUT
    858