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  • #***************************************************************************
    #                                  _   _ ____  _
    #  Project                     ___| | | |  _ \| |
    #                             / __| | | | |_) | |
    #                            | (__| |_| |  _ <| |___
    #                             \___|\___/|_| \_\_____|
    #
    # Copyright (C) 1998 - 2008, Daniel Stenberg, <daniel@haxx.se>, et al.
    #
    # This software is licensed as described in the file COPYING, which
    # you should have received as part of this distribution. The terms
    # are also available at http://curl.haxx.se/docs/copyright.html.
    #
    # You may opt to use, copy, modify, merge, publish, distribute and/or sell
    # copies of the Software, and permit persons to whom the Software is
    # furnished to do so, under the terms of the COPYING file.
    #
    # This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
    # KIND, either express or implied.
    #
    # $Id$
    #***************************************************************************
    
    # File version for 'aclocal' use. Keep it a single number.
    
    # serial 13
    
    
    dnl CURL_INCLUDES_NETDB
    dnl -------------------------------------------------
    dnl Set up variable with list of headers that must be
    dnl included when netdb.h is to be included.
    
    AC_DEFUN([CURL_INCLUDES_NETDB], [
    curl_includes_netdb="\
    /* includes start */
    #ifdef HAVE_SYS_TYPES_H
    #  include <sys/types.h>
    #endif
    #ifdef HAVE_NETDB_H
    #  include <netdb.h>
    #endif
    /* includes end */"
      AC_CHECK_HEADERS(
        sys/types.h netdb.h,
        [], [], [$curl_includes_netdb])
    ])
    
    dnl CURL_INCLUDES_SIGNAL
    dnl -------------------------------------------------
    dnl Set up variable with list of headers that must be
    dnl included when signal.h is to be included.
    
    AC_DEFUN([CURL_INCLUDES_SIGNAL], [
    curl_includes_signal="\
    /* includes start */
    #ifdef HAVE_SYS_TYPES_H
    #  include <sys/types.h>
    #endif
    #ifdef HAVE_SIGNAL_H
    #  include <signal.h>
    #endif
    /* includes end */"
      AC_CHECK_HEADERS(
        sys/types.h signal.h,
        [], [], [$curl_includes_signal])
    ])
    
    
    
    dnl CURL_INCLUDES_STDIO
    dnl -------------------------------------------------
    dnl Set up variable with list of headers that must be
    dnl included when stdio.h is to be included.
    
    AC_DEFUN([CURL_INCLUDES_STDIO], [
    curl_includes_stdio="\
    /* includes start */
    #ifdef HAVE_SYS_TYPES_H
    #  include <sys/types.h>
    #endif
    #ifdef HAVE_STDIO_H
    #  include <stdio.h>
    #endif
    /* includes end */"
      AC_CHECK_HEADERS(
        sys/types.h stdio.h,
        [], [], [$curl_includes_stdio])
    ])
    
    
    
    dnl CURL_INCLUDES_STDLIB
    dnl -------------------------------------------------
    dnl Set up variable with list of headers that must be
    dnl included when stdlib.h is to be included.
    
    AC_DEFUN([CURL_INCLUDES_STDLIB], [
    curl_includes_stdlib="\
    /* includes start */
    #ifdef HAVE_SYS_TYPES_H
    #  include <sys/types.h>
    #endif
    #ifdef HAVE_STDLIB_H
    #  include <stdlib.h>
    #endif
    /* includes end */"
      AC_CHECK_HEADERS(
        sys/types.h stdlib.h,
        [], [], [$curl_includes_stdlib])
    ])
    
    
    
    dnl CURL_INCLUDES_STRING
    dnl -------------------------------------------------
    dnl Set up variable with list of headers that must be
    
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    dnl included when string(s).h is to be included.
    
    
    AC_DEFUN([CURL_INCLUDES_STRING], [
    curl_includes_string="\
    /* includes start */
    #ifdef HAVE_SYS_TYPES_H
    #  include <sys/types.h>
    #endif
    #ifdef HAVE_STRING_H
    #  include <string.h>
    #endif
    
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    #ifdef HAVE_STRINGS_H
    #  include <strings.h>
    #endif
    
    /* includes end */"
      AC_CHECK_HEADERS(
    
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        sys/types.h string.h strings.h,
    
        [], [], [$curl_includes_string])
    ])
    
    
    
    dnl CURL_INCLUDES_SYS_UIO
    dnl -------------------------------------------------
    dnl Set up variable with list of headers that must be
    dnl included when sys/uio.h is to be included.
    
    AC_DEFUN([CURL_INCLUDES_SYS_UIO], [
    curl_includes_sys_uio="\
    /* includes start */
    #ifdef HAVE_SYS_TYPES_H
    #  include <sys/types.h>
    #endif
    #ifdef HAVE_SYS_UIO_H
    #  include <sys/uio.h>
    #endif
    /* includes end */"
      AC_CHECK_HEADERS(
        sys/types.h sys/uio.h,
        [], [], [$curl_includes_sys_uio])
    ])
    
    
    
    dnl CURL_INCLUDES_TIME
    dnl -------------------------------------------------
    dnl Set up variable with list of headers that must be
    dnl included when time.h is to be included.
    
    AC_DEFUN([CURL_INCLUDES_TIME], [
    AC_REQUIRE([AC_HEADER_TIME])dnl
    curl_includes_time="\
    /* includes start */
    #ifdef HAVE_SYS_TYPES_H
    #  include <sys/types.h>
    #endif
    #ifdef HAVE_SYS_TIME_H
    #  include <sys/time.h>
    #  ifdef TIME_WITH_SYS_TIME
    #    include <time.h>
    #  endif
    #else
    #  ifdef HAVE_TIME_H
    #    include <time.h>
    #  endif
    #endif
    /* includes end */"
      AC_CHECK_HEADERS(
        sys/types.h sys/time.h time.h,
        [], [], [$curl_includes_time])
    ])
    
    
    
    dnl CURL_INCLUDES_UNISTD
    dnl -------------------------------------------------
    dnl Set up variable with list of headers that must be
    dnl included when unistd.h is to be included.
    
    AC_DEFUN([CURL_INCLUDES_UNISTD], [
    curl_includes_unistd="\
    /* includes start */
    #ifdef HAVE_SYS_TYPES_H
    #  include <sys/types.h>
    #endif
    #ifdef HAVE_UNISTD_H
    #  include <unistd.h>
    #endif
    /* includes end */"
      AC_CHECK_HEADERS(
        sys/types.h unistd.h,
        [], [], [$curl_includes_unistd])
    ])
    
    
    
    dnl CURL_CHECK_FUNC_FDOPEN
    dnl -------------------------------------------------
    dnl Verify if fdopen is available, prototyped, and
    dnl can be compiled. If all of these are true, and
    dnl usage has not been previously disallowed with
    dnl shell variable curl_disallow_fdopen, then
    dnl HAVE_FDOPEN will be defined.
    
    AC_DEFUN([CURL_CHECK_FUNC_FDOPEN], [
      AC_REQUIRE([CURL_INCLUDES_STDIO])dnl
      #
      tst_links_fdopen="unknown"
      tst_proto_fdopen="unknown"
      tst_compi_fdopen="unknown"
      tst_allow_fdopen="unknown"
      #
      AC_MSG_CHECKING([if fdopen can be linked])
      AC_LINK_IFELSE([
        AC_LANG_FUNC_LINK_TRY([fdopen])
      ],[
        AC_MSG_RESULT([yes])
        tst_links_fdopen="yes"
      ],[
        AC_MSG_RESULT([no])
        tst_links_fdopen="no"
      ])
      #
      if test "$tst_links_fdopen" = "yes"; then
        AC_MSG_CHECKING([if fdopen is prototyped])
        AC_EGREP_CPP([fdopen],[
          $curl_includes_stdio
        ],[
          AC_MSG_RESULT([yes])
          tst_proto_fdopen="yes"
        ],[
          AC_MSG_RESULT([no])
          tst_proto_fdopen="no"
        ])
      fi
      #
      if test "$tst_proto_fdopen" = "yes"; then
        AC_MSG_CHECKING([if fdopen is compilable])
        AC_COMPILE_IFELSE([
          AC_LANG_PROGRAM([[
            $curl_includes_stdio
          ]],[[
            if(0 != fdopen(0, 0))
              return 1;
          ]])
        ],[
          AC_MSG_RESULT([yes])
          tst_compi_fdopen="yes"
        ],[
          AC_MSG_RESULT([no])
          tst_compi_fdopen="no"
        ])
      fi
      #
      if test "$tst_compi_fdopen" = "yes"; then
        AC_MSG_CHECKING([if fdopen usage allowed])
        if test "x$curl_disallow_fdopen" != "xyes"; then
          AC_MSG_RESULT([yes])
          tst_allow_fdopen="yes"
        else
          AC_MSG_RESULT([no])
          tst_allow_fdopen="no"
        fi
      fi
      #
      AC_MSG_CHECKING([if fdopen might be used])
      if test "$tst_links_fdopen" = "yes" &&
         test "$tst_proto_fdopen" = "yes" &&
         test "$tst_compi_fdopen" = "yes" &&
         test "$tst_allow_fdopen" = "yes"; then
        AC_MSG_RESULT([yes])
        AC_DEFINE_UNQUOTED(HAVE_FDOPEN, 1,
          [Define to 1 if you have the fdopen function.])
        ac_cv_func_fdopen="yes"
      else
        AC_MSG_RESULT([no])
        ac_cv_func_fdopen="no"
      fi
    ])
    
    
    
    dnl CURL_CHECK_FUNC_FTRUNCATE
    dnl -------------------------------------------------
    dnl Verify if ftruncate is available, prototyped, and
    dnl can be compiled. If all of these are true, and
    dnl usage has not been previously disallowed with
    dnl shell variable curl_disallow_ftruncate, then
    dnl HAVE_FTRUNCATE will be defined.
    
    AC_DEFUN([CURL_CHECK_FUNC_FTRUNCATE], [
      AC_REQUIRE([CURL_INCLUDES_UNISTD])dnl
      #
      tst_links_ftruncate="unknown"
      tst_proto_ftruncate="unknown"
      tst_compi_ftruncate="unknown"
      tst_allow_ftruncate="unknown"
      #
      AC_MSG_CHECKING([if ftruncate can be linked])
      AC_LINK_IFELSE([
        AC_LANG_FUNC_LINK_TRY([ftruncate])
      ],[
        AC_MSG_RESULT([yes])
        tst_links_ftruncate="yes"
      ],[
        AC_MSG_RESULT([no])
        tst_links_ftruncate="no"
      ])
      #
      if test "$tst_links_ftruncate" = "yes"; then
        AC_MSG_CHECKING([if ftruncate is prototyped])
        AC_EGREP_CPP([ftruncate],[
          $curl_includes_unistd
        ],[
          AC_MSG_RESULT([yes])
          tst_proto_ftruncate="yes"
        ],[
          AC_MSG_RESULT([no])
          tst_proto_ftruncate="no"
        ])
      fi
      #
      if test "$tst_proto_ftruncate" = "yes"; then
        AC_MSG_CHECKING([if ftruncate is compilable])
        AC_COMPILE_IFELSE([
          AC_LANG_PROGRAM([[
            $curl_includes_unistd
          ]],[[
            if(0 != ftruncate(0, 0))
              return 1;
          ]])
        ],[
          AC_MSG_RESULT([yes])
          tst_compi_ftruncate="yes"
        ],[
          AC_MSG_RESULT([no])
          tst_compi_ftruncate="no"
        ])
      fi
      #
      if test "$tst_compi_ftruncate" = "yes"; then
        AC_MSG_CHECKING([if ftruncate usage allowed])
        if test "x$curl_disallow_ftruncate" != "xyes"; then
          AC_MSG_RESULT([yes])
          tst_allow_ftruncate="yes"
        else
          AC_MSG_RESULT([no])
          tst_allow_ftruncate="no"
        fi
      fi
      #
      AC_MSG_CHECKING([if ftruncate might be used])
      if test "$tst_links_ftruncate" = "yes" &&
         test "$tst_proto_ftruncate" = "yes" &&
         test "$tst_compi_ftruncate" = "yes" &&
         test "$tst_allow_ftruncate" = "yes"; then
        AC_MSG_RESULT([yes])
        AC_DEFINE_UNQUOTED(HAVE_FTRUNCATE, 1,
          [Define to 1 if you have the ftruncate function.])
        ac_cv_func_ftruncate="yes"
      else
        AC_MSG_RESULT([no])
        ac_cv_func_ftruncate="no"
      fi
    ])
    
    
    
    dnl CURL_CHECK_FUNC_GETHOSTBYADDR_R
    dnl -------------------------------------------------
    dnl Verify if gethostbyaddr_r is available, prototyped,
    dnl and can be compiled. If all of these are true, and
    dnl usage has not been previously disallowed with
    dnl shell variable curl_disallow_gethostbyaddr_r, then
    dnl HAVE_GETHOSTBYADDR_R will be defined.
    
    AC_DEFUN([CURL_CHECK_FUNC_GETHOSTBYADDR_R], [
    
      AC_REQUIRE([CURL_INCLUDES_NETDB])dnl
    
      #
      tst_links_gethostbyaddr_r="unknown"
      tst_proto_gethostbyaddr_r="unknown"
      tst_compi_gethostbyaddr_r="unknown"
      tst_allow_gethostbyaddr_r="unknown"
      tst_nargs_gethostbyaddr_r="unknown"
      #
      AC_MSG_CHECKING([if gethostbyaddr_r can be linked])
      AC_LINK_IFELSE([
        AC_LANG_FUNC_LINK_TRY([gethostbyaddr_r])
      ],[
        AC_MSG_RESULT([yes])
        tst_links_gethostbyaddr_r="yes"
      ],[
        AC_MSG_RESULT([no])
        tst_links_gethostbyaddr_r="no"
      ])
      #
      if test "$tst_links_gethostbyaddr_r" = "yes"; then
        AC_MSG_CHECKING([if gethostbyaddr_r is prototyped])
        AC_EGREP_CPP([gethostbyaddr_r],[
          $curl_includes_netdb
        ],[
          AC_MSG_RESULT([yes])
          tst_proto_gethostbyaddr_r="yes"
        ],[
          AC_MSG_RESULT([no])
          tst_proto_gethostbyaddr_r="no"
        ])
      fi
      #
      if test "$tst_proto_gethostbyaddr_r" = "yes"; then
        if test "$tst_nargs_gethostbyaddr_r" = "unknown"; then
          AC_MSG_CHECKING([if gethostbyaddr_r takes 5 args.])
          AC_COMPILE_IFELSE([
            AC_LANG_PROGRAM([[
              $curl_includes_netdb
            ]],[[
              if(0 != gethostbyaddr_r(0, 0, 0, 0, 0))
                return 1;
            ]])
          ],[
            AC_MSG_RESULT([yes])
            tst_compi_gethostbyaddr_r="yes"
            tst_nargs_gethostbyaddr_r="5"
          ],[
            AC_MSG_RESULT([no])
            tst_compi_gethostbyaddr_r="no"
          ])
        fi
        if test "$tst_nargs_gethostbyaddr_r" = "unknown"; then
          AC_MSG_CHECKING([if gethostbyaddr_r takes 7 args.])
          AC_COMPILE_IFELSE([
            AC_LANG_PROGRAM([[
              $curl_includes_netdb
            ]],[[
              if(0 != gethostbyaddr_r(0, 0, 0, 0, 0, 0, 0))
                return 1;
            ]])
          ],[
            AC_MSG_RESULT([yes])
            tst_compi_gethostbyaddr_r="yes"
            tst_nargs_gethostbyaddr_r="7"
          ],[
            AC_MSG_RESULT([no])
            tst_compi_gethostbyaddr_r="no"
          ])
        fi
        if test "$tst_nargs_gethostbyaddr_r" = "unknown"; then
          AC_MSG_CHECKING([if gethostbyaddr_r takes 8 args.])
          AC_COMPILE_IFELSE([
            AC_LANG_PROGRAM([[
              $curl_includes_netdb
            ]],[[
              if(0 != gethostbyaddr_r(0, 0, 0, 0, 0, 0, 0, 0))
                return 1;
            ]])
          ],[
            AC_MSG_RESULT([yes])
            tst_compi_gethostbyaddr_r="yes"
            tst_nargs_gethostbyaddr_r="8"
          ],[
            AC_MSG_RESULT([no])
            tst_compi_gethostbyaddr_r="no"
          ])
        fi
        AC_MSG_CHECKING([if gethostbyaddr_r is compilable])
        if test "$tst_compi_gethostbyaddr_r" = "yes"; then
          AC_MSG_RESULT([yes])
        else
          AC_MSG_RESULT([no])
        fi
      fi
      #
      if test "$tst_compi_gethostbyaddr_r" = "yes"; then
        AC_MSG_CHECKING([if gethostbyaddr_r usage allowed])
        if test "x$curl_disallow_gethostbyaddr_r" != "xyes"; then
          AC_MSG_RESULT([yes])
          tst_allow_gethostbyaddr_r="yes"
        else
          AC_MSG_RESULT([no])
          tst_allow_gethostbyaddr_r="no"
        fi
      fi
      #
      AC_MSG_CHECKING([if gethostbyaddr_r might be used])
      if test "$tst_links_gethostbyaddr_r" = "yes" &&
         test "$tst_proto_gethostbyaddr_r" = "yes" &&
         test "$tst_compi_gethostbyaddr_r" = "yes" &&
         test "$tst_allow_gethostbyaddr_r" = "yes"; then
        AC_MSG_RESULT([yes])
        AC_DEFINE_UNQUOTED(HAVE_GETHOSTBYADDR_R, 1,
          [Define to 1 if you have the gethostbyaddr_r function.])
        dnl AC_DEFINE_UNQUOTED(GETHOSTBYADDR_R_ARGS, $tst_nargs_gethostbyaddr_r,
        dnl   [Specifies the number of arguments to gethostbyaddr_r])
        #
    
        if test "$tst_nargs_gethostbyaddr_r" -eq "5"; then
    
          AC_DEFINE(HAVE_GETHOSTBYADDR_R_5, 1, [gethostbyaddr_r() takes 5 args])
    
        elif test "$tst_nargs_gethostbyaddr_r" -eq "7"; then
    
          AC_DEFINE(HAVE_GETHOSTBYADDR_R_7, 1, [gethostbyaddr_r() takes 7 args])
    
        elif test "$tst_nargs_gethostbyaddr_r" -eq "8"; then
    
          AC_DEFINE(HAVE_GETHOSTBYADDR_R_8, 1, [gethostbyaddr_r() takes 8 args])
        fi
        #
        ac_cv_func_gethostbyaddr_r="yes"
      else
        AC_MSG_RESULT([no])
        ac_cv_func_gethostbyaddr_r="no"
      fi
    ])
    
    
    dnl CURL_CHECK_FUNC_GETHOSTBYNAME_R
    dnl -------------------------------------------------
    dnl Verify if gethostbyname_r is available, prototyped,
    dnl and can be compiled. If all of these are true, and
    dnl usage has not been previously disallowed with
    dnl shell variable curl_disallow_gethostbyname_r, then
    dnl HAVE_GETHOSTBYNAME_R will be defined.
    
    AC_DEFUN([CURL_CHECK_FUNC_GETHOSTBYNAME_R], [
    
      AC_REQUIRE([CURL_INCLUDES_NETDB])dnl
    
      #
      tst_links_gethostbyname_r="unknown"
      tst_proto_gethostbyname_r="unknown"
      tst_compi_gethostbyname_r="unknown"
      tst_allow_gethostbyname_r="unknown"
      tst_nargs_gethostbyname_r="unknown"
      #
      AC_MSG_CHECKING([if gethostbyname_r can be linked])
      AC_LINK_IFELSE([
        AC_LANG_FUNC_LINK_TRY([gethostbyname_r])
      ],[
        AC_MSG_RESULT([yes])
        tst_links_gethostbyname_r="yes"
      ],[
        AC_MSG_RESULT([no])
        tst_links_gethostbyname_r="no"
      ])
      #
      if test "$tst_links_gethostbyname_r" = "yes"; then
        AC_MSG_CHECKING([if gethostbyname_r is prototyped])
        AC_EGREP_CPP([gethostbyname_r],[
          $curl_includes_netdb
        ],[
          AC_MSG_RESULT([yes])
          tst_proto_gethostbyname_r="yes"
        ],[
          AC_MSG_RESULT([no])
          tst_proto_gethostbyname_r="no"
        ])
      fi
      #
      if test "$tst_proto_gethostbyname_r" = "yes"; then
        if test "$tst_nargs_gethostbyname_r" = "unknown"; then
          AC_MSG_CHECKING([if gethostbyname_r takes 3 args.])
          AC_COMPILE_IFELSE([
            AC_LANG_PROGRAM([[
              $curl_includes_netdb
            ]],[[
              if(0 != gethostbyname_r(0, 0, 0))
                return 1;
            ]])
          ],[
            AC_MSG_RESULT([yes])
            tst_compi_gethostbyname_r="yes"
            tst_nargs_gethostbyname_r="3"
          ],[
            AC_MSG_RESULT([no])
            tst_compi_gethostbyname_r="no"
          ])
        fi
        if test "$tst_nargs_gethostbyname_r" = "unknown"; then
          AC_MSG_CHECKING([if gethostbyname_r takes 5 args.])
          AC_COMPILE_IFELSE([
            AC_LANG_PROGRAM([[
              $curl_includes_netdb
            ]],[[
              if(0 != gethostbyname_r(0, 0, 0, 0, 0))
                return 1;
            ]])
          ],[
            AC_MSG_RESULT([yes])
            tst_compi_gethostbyname_r="yes"
            tst_nargs_gethostbyname_r="5"
          ],[
            AC_MSG_RESULT([no])
            tst_compi_gethostbyname_r="no"
          ])
        fi
        if test "$tst_nargs_gethostbyname_r" = "unknown"; then
          AC_MSG_CHECKING([if gethostbyname_r takes 6 args.])
          AC_COMPILE_IFELSE([
            AC_LANG_PROGRAM([[
              $curl_includes_netdb
            ]],[[
              if(0 != gethostbyname_r(0, 0, 0, 0, 0, 0))
                return 1;
            ]])
          ],[
            AC_MSG_RESULT([yes])
            tst_compi_gethostbyname_r="yes"
            tst_nargs_gethostbyname_r="6"
          ],[
            AC_MSG_RESULT([no])
            tst_compi_gethostbyname_r="no"
          ])
        fi
        AC_MSG_CHECKING([if gethostbyname_r is compilable])
        if test "$tst_compi_gethostbyname_r" = "yes"; then
          AC_MSG_RESULT([yes])
        else
          AC_MSG_RESULT([no])
        fi
      fi
      #
      if test "$tst_compi_gethostbyname_r" = "yes"; then
        AC_MSG_CHECKING([if gethostbyname_r usage allowed])
        if test "x$curl_disallow_gethostbyname_r" != "xyes"; then
          AC_MSG_RESULT([yes])
          tst_allow_gethostbyname_r="yes"
        else
          AC_MSG_RESULT([no])
          tst_allow_gethostbyname_r="no"
        fi
      fi
      #
      AC_MSG_CHECKING([if gethostbyname_r might be used])
      if test "$tst_links_gethostbyname_r" = "yes" &&
         test "$tst_proto_gethostbyname_r" = "yes" &&
         test "$tst_compi_gethostbyname_r" = "yes" &&
         test "$tst_allow_gethostbyname_r" = "yes"; then
        AC_MSG_RESULT([yes])
        AC_DEFINE_UNQUOTED(HAVE_GETHOSTBYNAME_R, 1,
          [Define to 1 if you have the gethostbyname_r function.])
        dnl AC_DEFINE_UNQUOTED(GETHOSTBYNAME_R_ARGS, $tst_nargs_gethostbyname_r,
        dnl   [Specifies the number of arguments to gethostbyname_r])
        #
    
        if test "$tst_nargs_gethostbyname_r" -eq "3"; then
    
          AC_DEFINE(HAVE_GETHOSTBYNAME_R_3, 1, [gethostbyname_r() takes 3 args])
    
        elif test "$tst_nargs_gethostbyname_r" -eq "5"; then
    
          AC_DEFINE(HAVE_GETHOSTBYNAME_R_5, 1, [gethostbyname_r() takes 5 args])
    
        elif test "$tst_nargs_gethostbyname_r" -eq "6"; then
    
          AC_DEFINE(HAVE_GETHOSTBYNAME_R_6, 1, [gethostbyname_r() takes 6 args])
        fi
        #
        ac_cv_func_gethostbyname_r="yes"
      else
        AC_MSG_RESULT([no])
        ac_cv_func_gethostbyname_r="no"
      fi
    ])
    
    
    
    dnl CURL_CHECK_FUNC_GETHOSTNAME
    dnl -------------------------------------------------
    dnl Verify if gethostname is available, prototyped, and
    dnl can be compiled. If all of these are true, and
    dnl usage has not been previously disallowed with
    dnl shell variable curl_disallow_gethostname, then
    dnl HAVE_GETHOSTNAME will be defined.
    
    AC_DEFUN([CURL_CHECK_FUNC_GETHOSTNAME], [
      AC_REQUIRE([CURL_INCLUDES_UNISTD])dnl
      #
      tst_links_gethostname="unknown"
      tst_proto_gethostname="unknown"
      tst_compi_gethostname="unknown"
      tst_allow_gethostname="unknown"
      #
      AC_MSG_CHECKING([if gethostname can be linked])
      AC_LINK_IFELSE([
        AC_LANG_FUNC_LINK_TRY([gethostname])
      ],[
        AC_MSG_RESULT([yes])
        tst_links_gethostname="yes"
      ],[
        AC_MSG_RESULT([no])
        tst_links_gethostname="no"
      ])
      #
      if test "$tst_links_gethostname" = "yes"; then
        AC_MSG_CHECKING([if gethostname is prototyped])
        AC_EGREP_CPP([gethostname],[
          $curl_includes_unistd
        ],[
          AC_MSG_RESULT([yes])
          tst_proto_gethostname="yes"
        ],[
          AC_MSG_RESULT([no])
          tst_proto_gethostname="no"
        ])
      fi
      #
      if test "$tst_proto_gethostname" = "yes"; then
        AC_MSG_CHECKING([if gethostname is compilable])
        AC_COMPILE_IFELSE([
          AC_LANG_PROGRAM([[
            $curl_includes_unistd
          ]],[[
            if(0 != gethostname(0, 0))
              return 1;
          ]])
        ],[
          AC_MSG_RESULT([yes])
          tst_compi_gethostname="yes"
        ],[
          AC_MSG_RESULT([no])
          tst_compi_gethostname="no"
        ])
      fi
      #
      if test "$tst_compi_gethostname" = "yes"; then
        AC_MSG_CHECKING([if gethostname usage allowed])
        if test "x$curl_disallow_gethostname" != "xyes"; then
          AC_MSG_RESULT([yes])
          tst_allow_gethostname="yes"
        else
          AC_MSG_RESULT([no])
          tst_allow_gethostname="no"
        fi
      fi
      #
      AC_MSG_CHECKING([if gethostname might be used])
      if test "$tst_links_gethostname" = "yes" &&
         test "$tst_proto_gethostname" = "yes" &&
         test "$tst_compi_gethostname" = "yes" &&
         test "$tst_allow_gethostname" = "yes"; then
        AC_MSG_RESULT([yes])
        AC_DEFINE_UNQUOTED(HAVE_GETHOSTNAME, 1,
          [Define to 1 if you have the gethostname function.])
        ac_cv_func_gethostname="yes"
      else
        AC_MSG_RESULT([no])
        ac_cv_func_gethostname="no"
      fi
    ])
    
    
    
    dnl CURL_CHECK_FUNC_GETSERVBYPORT_R
    dnl -------------------------------------------------
    dnl Verify if getservbyport_r is available, prototyped,
    dnl and can be compiled. If all of these are true, and
    dnl usage has not been previously disallowed with
    dnl shell variable curl_disallow_getservbyport_r, then
    dnl HAVE_GETSERVBYPORT_R will be defined.
    
    AC_DEFUN([CURL_CHECK_FUNC_GETSERVBYPORT_R], [
    
      AC_REQUIRE([CURL_INCLUDES_NETDB])dnl
    
      #
      tst_links_getservbyport_r="unknown"
      tst_proto_getservbyport_r="unknown"
      tst_compi_getservbyport_r="unknown"
      tst_allow_getservbyport_r="unknown"
      tst_nargs_getservbyport_r="unknown"
      #
      AC_MSG_CHECKING([if getservbyport_r can be linked])
      AC_LINK_IFELSE([
        AC_LANG_FUNC_LINK_TRY([getservbyport_r])
      ],[
        AC_MSG_RESULT([yes])
        tst_links_getservbyport_r="yes"
      ],[
        AC_MSG_RESULT([no])
        tst_links_getservbyport_r="no"
      ])
      #
      if test "$tst_links_getservbyport_r" = "yes"; then
        AC_MSG_CHECKING([if getservbyport_r is prototyped])
        AC_EGREP_CPP([getservbyport_r],[
          $curl_includes_netdb
        ],[
          AC_MSG_RESULT([yes])
          tst_proto_getservbyport_r="yes"
        ],[
          AC_MSG_RESULT([no])
          tst_proto_getservbyport_r="no"
        ])
      fi
      #
      if test "$tst_proto_getservbyport_r" = "yes"; then
        if test "$tst_nargs_getservbyport_r" = "unknown"; then
          AC_MSG_CHECKING([if getservbyport_r takes 4 args.])
          AC_COMPILE_IFELSE([
            AC_LANG_PROGRAM([[
              $curl_includes_netdb
            ]],[[
              if(0 != getservbyport_r(0, 0, 0, 0))
                return 1;
            ]])
          ],[
            AC_MSG_RESULT([yes])
            tst_compi_getservbyport_r="yes"
            tst_nargs_getservbyport_r="4"
          ],[
            AC_MSG_RESULT([no])
            tst_compi_getservbyport_r="no"
          ])
        fi
        if test "$tst_nargs_getservbyport_r" = "unknown"; then
          AC_MSG_CHECKING([if getservbyport_r takes 5 args.])
          AC_COMPILE_IFELSE([
            AC_LANG_PROGRAM([[
              $curl_includes_netdb
            ]],[[
              if(0 != getservbyport_r(0, 0, 0, 0, 0))
                return 1;
            ]])
          ],[
            AC_MSG_RESULT([yes])
            tst_compi_getservbyport_r="yes"
            tst_nargs_getservbyport_r="5"
          ],[
            AC_MSG_RESULT([no])
            tst_compi_getservbyport_r="no"
          ])
        fi
        if test "$tst_nargs_getservbyport_r" = "unknown"; then
          AC_MSG_CHECKING([if getservbyport_r takes 6 args.])
          AC_COMPILE_IFELSE([
            AC_LANG_PROGRAM([[
              $curl_includes_netdb
            ]],[[
              if(0 != getservbyport_r(0, 0, 0, 0, 0, 0))
                return 1;
            ]])
          ],[
            AC_MSG_RESULT([yes])
            tst_compi_getservbyport_r="yes"
            tst_nargs_getservbyport_r="6"
          ],[
            AC_MSG_RESULT([no])
            tst_compi_getservbyport_r="no"
          ])
        fi
        AC_MSG_CHECKING([if getservbyport_r is compilable])
        if test "$tst_compi_getservbyport_r" = "yes"; then
          AC_MSG_RESULT([yes])
        else
          AC_MSG_RESULT([no])
        fi
      fi
      #
      if test "$tst_compi_getservbyport_r" = "yes"; then
        AC_MSG_CHECKING([if getservbyport_r usage allowed])
        if test "x$curl_disallow_getservbyport_r" != "xyes"; then
          AC_MSG_RESULT([yes])
          tst_allow_getservbyport_r="yes"
        else
          AC_MSG_RESULT([no])
          tst_allow_getservbyport_r="no"
        fi
      fi
      #
      AC_MSG_CHECKING([if getservbyport_r might be used])
      if test "$tst_links_getservbyport_r" = "yes" &&
         test "$tst_proto_getservbyport_r" = "yes" &&
         test "$tst_compi_getservbyport_r" = "yes" &&
         test "$tst_allow_getservbyport_r" = "yes"; then
        AC_MSG_RESULT([yes])
        AC_DEFINE_UNQUOTED(HAVE_GETSERVBYPORT_R, 1,
          [Define to 1 if you have the getservbyport_r function.])
        AC_DEFINE_UNQUOTED(GETSERVBYPORT_R_ARGS, $tst_nargs_getservbyport_r,
          [Specifies the number of arguments to getservbyport_r])
        if test "$tst_nargs_getservbyport_r" -eq "4"; then
          AC_DEFINE(GETSERVBYPORT_R_BUFSIZE, sizeof(struct servent_data),
            [Specifies the size of the buffer to pass to getservbyport_r])
        else
          AC_DEFINE(GETSERVBYPORT_R_BUFSIZE, 4096,
            [Specifies the size of the buffer to pass to getservbyport_r])
        fi
        ac_cv_func_getservbyport_r="yes"
      else
        AC_MSG_RESULT([no])
        ac_cv_func_getservbyport_r="no"
      fi
    ])
    
    
    
    dnl CURL_CHECK_FUNC_GMTIME_R
    dnl -------------------------------------------------
    dnl Verify if gmtime_r is available, prototyped, can
    dnl be compiled and seems to work. If all of these are
    dnl true, and usage has not been previously disallowed
    dnl with shell variable curl_disallow_gmtime_r, then
    dnl HAVE_GMTIME_R will be defined.
    
    AC_DEFUN([CURL_CHECK_FUNC_GMTIME_R], [
      AC_REQUIRE([CURL_INCLUDES_TIME])dnl
      #
      tst_links_gmtime_r="unknown"
      tst_proto_gmtime_r="unknown"
      tst_compi_gmtime_r="unknown"
      tst_works_gmtime_r="unknown"
      tst_allow_gmtime_r="unknown"
      #
      AC_MSG_CHECKING([if gmtime_r can be linked])
      AC_LINK_IFELSE([
        AC_LANG_FUNC_LINK_TRY([gmtime_r])
      ],[
        AC_MSG_RESULT([yes])
        tst_links_gmtime_r="yes"
      ],[
        AC_MSG_RESULT([no])
        tst_links_gmtime_r="no"
      ])
      #
      if test "$tst_links_gmtime_r" = "yes"; then
        AC_MSG_CHECKING([if gmtime_r is prototyped])
        AC_EGREP_CPP([gmtime_r],[
          $curl_includes_time
        ],[
          AC_MSG_RESULT([yes])
          tst_proto_gmtime_r="yes"
        ],[
          AC_MSG_RESULT([no])
          tst_proto_gmtime_r="no"
        ])
      fi
      #
      if test "$tst_proto_gmtime_r" = "yes"; then
        AC_MSG_CHECKING([if gmtime_r is compilable])
        AC_COMPILE_IFELSE([
          AC_LANG_PROGRAM([[
            $curl_includes_time
          ]],[[
    
            if(0 != gmtime_r(0, 0))
              return 1;
    
          ]])
        ],[
          AC_MSG_RESULT([yes])
          tst_compi_gmtime_r="yes"
        ],[
          AC_MSG_RESULT([no])
          tst_compi_gmtime_r="no"
        ])
      fi
      #
      dnl only do runtime verification when not cross-compiling
      if test "x$cross_compiling" != "xyes" &&
        test "$tst_compi_gmtime_r" = "yes"; then
        AC_MSG_CHECKING([if gmtime_r seems to work])
        AC_RUN_IFELSE([
          AC_LANG_PROGRAM([[
            $curl_includes_time
          ]],[[
            time_t local = 1170352587;
            struct tm *gmt = 0;
            struct tm result;
            gmt = gmtime_r(&local, &result);
            if(gmt)
              exit(0);
            else
              exit(1);
          ]])
        ],[
          AC_MSG_RESULT([yes])
          tst_works_gmtime_r="yes"
        ],[
          AC_MSG_RESULT([no])
          tst_works_gmtime_r="no"
        ])
      fi
      #
    
      if test "$tst_compi_gmtime_r" = "yes" &&
        test "$tst_works_gmtime_r" != "no"; then
    
        AC_MSG_CHECKING([if gmtime_r usage allowed])
        if test "x$curl_disallow_gmtime_r" != "xyes"; then
          AC_MSG_RESULT([yes])
          tst_allow_gmtime_r="yes"
        else
          AC_MSG_RESULT([no])
          tst_allow_gmtime_r="no"
        fi
      fi
      #
      AC_MSG_CHECKING([if gmtime_r might be used])
      if test "$tst_links_gmtime_r" = "yes" &&
         test "$tst_proto_gmtime_r" = "yes" &&
         test "$tst_compi_gmtime_r" = "yes" &&
         test "$tst_allow_gmtime_r" = "yes" &&
         test "$tst_works_gmtime_r" != "no"; then
        AC_MSG_RESULT([yes])
        AC_DEFINE_UNQUOTED(HAVE_GMTIME_R, 1,
          [Define to 1 if you have a working gmtime_r function.])
        ac_cv_func_gmtime_r="yes"
      else
        AC_MSG_RESULT([no])
        ac_cv_func_gmtime_r="no"
      fi
    ])
    
    
    
    dnl CURL_CHECK_FUNC_LOCALTIME_R