curl-functions.m4

  tst_allow_strerror_r="unknown"
  tst_works_glibc_strerror_r="unknown"
  tst_works_posix_strerror_r="unknown"
  tst_glibc_strerror_r_type_arg3="unknown"
  tst_posix_strerror_r_type_arg3="unknown"
  #
  AC_MSG_CHECKING([if strerror_r can be linked])
  AC_LINK_IFELSE([
    AC_LANG_FUNC_LINK_TRY([strerror_r])
  ],[
    AC_MSG_RESULT([yes])
    tst_links_strerror_r="yes"
  ],[
    AC_MSG_RESULT([no])
    tst_links_strerror_r="no"
  ])
  #
  if test "$tst_links_strerror_r" = "yes"; then
    AC_MSG_CHECKING([if strerror_r is prototyped])
    AC_EGREP_CPP([strerror_r],[
      $curl_includes_string
    ],[
      AC_MSG_RESULT([yes])
      tst_proto_strerror_r="yes"
    ],[
      AC_MSG_RESULT([no])
      tst_proto_strerror_r="no"
    ])
  fi
  #
  if test "$tst_proto_strerror_r" = "yes"; then
    AC_MSG_CHECKING([if strerror_r is compilable])
    AC_COMPILE_IFELSE([
      AC_LANG_PROGRAM([[
        $curl_includes_string
      ]],[[
        if(0 != strerror_r(0, 0, 0))
          return 1;
      ]])
    ],[
      AC_MSG_RESULT([yes])
      tst_compi_strerror_r="yes"
    ],[
      AC_MSG_RESULT([no])
      tst_compi_strerror_r="no"
    ])
  fi
  #
  if test "$tst_compi_strerror_r" = "yes"; then
    AC_MSG_CHECKING([if strerror_r is glibc like])
    tst_glibc_strerror_r_type_arg3="unknown"
    for arg3 in 'size_t' 'int' 'unsigned int'; do
      if test "$tst_glibc_strerror_r_type_arg3" = "unknown"; then
        AC_COMPILE_IFELSE([
          AC_LANG_PROGRAM([[
            $curl_includes_string
          ]],[[
            char *strerror_r(int errnum, char *workbuf, $arg3 bufsize);
            if(0 != strerror_r(0, 0, 0))
              return 1;
          ]])
        ],[
          tst_glibc_strerror_r_type_arg3="$arg3"
        ])
      fi
    done
    case "$tst_glibc_strerror_r_type_arg3" in
      unknown)
        AC_MSG_RESULT([no])
        tst_glibc_strerror_r="no"
        ;;
      *)
        AC_MSG_RESULT([yes])
        tst_glibc_strerror_r="yes"
        ;;
    esac
  fi
  #
  dnl only do runtime verification when not cross-compiling
  if test "x$cross_compiling" != "xyes" &&
    test "$tst_glibc_strerror_r" = "yes"; then
    AC_MSG_CHECKING([if strerror_r seems to work])
    AC_RUN_IFELSE([
      AC_LANG_PROGRAM([[
        $curl_includes_string
#       include <errno.h>
      ]],[[
        char buffer[1024];
        char *string = 0;
        buffer[0] = '\0';
        string = strerror_r(EACCES, buffer, sizeof(buffer));
        if(!string)
          exit(1); /* fail */
        if(!string[0])
          exit(1); /* fail */
        else
          exit(0);
      ]])
    ],[
      AC_MSG_RESULT([yes])
      tst_works_glibc_strerror_r="yes"
    ],[
      AC_MSG_RESULT([no])
      tst_works_glibc_strerror_r="no"
    ])
  fi
  #
  if test "$tst_compi_strerror_r" = "yes" &&
    test "$tst_works_glibc_strerror_r" != "yes"; then
    AC_MSG_CHECKING([if strerror_r is POSIX like])
    tst_posix_strerror_r_type_arg3="unknown"
    for arg3 in 'size_t' 'int' 'unsigned int'; do
      if test "$tst_posix_strerror_r_type_arg3" = "unknown"; then
        AC_COMPILE_IFELSE([
          AC_LANG_PROGRAM([[
            $curl_includes_string
          ]],[[
            int strerror_r(int errnum, char *resultbuf, $arg3 bufsize);
            if(0 != strerror_r(0, 0, 0))
              return 1;
          ]])
        ],[
          tst_posix_strerror_r_type_arg3="$arg3"
        ])
      fi
    done
    case "$tst_posix_strerror_r_type_arg3" in
      unknown)
        AC_MSG_RESULT([no])
        tst_posix_strerror_r="no"
        ;;
      *)
        AC_MSG_RESULT([yes])
        tst_posix_strerror_r="yes"
        ;;
    esac
  fi
  #
  dnl only do runtime verification when not cross-compiling
  if test "x$cross_compiling" != "xyes" &&
    test "$tst_posix_strerror_r" = "yes"; then
    AC_MSG_CHECKING([if strerror_r seems to work])
    AC_RUN_IFELSE([
      AC_LANG_PROGRAM([[
        $curl_includes_string
#       include <errno.h>
      ]],[[
        char buffer[1024];
        int error = 1;
        buffer[0] = '\0';
        error = strerror_r(EACCES, buffer, sizeof(buffer));
        if(error)
          exit(1); /* fail */
        if(buffer[0] == '\0')
          exit(1); /* fail */
        else
          exit(0);
      ]])
    ],[
      AC_MSG_RESULT([yes])
      tst_works_posix_strerror_r="yes"
    ],[
      AC_MSG_RESULT([no])
      tst_works_posix_strerror_r="no"
    ])
  fi
  #
  if test "$tst_works_glibc_strerror_r" = "yes"; then
    tst_posix_strerror_r="no"
  fi
  if test "$tst_works_posix_strerror_r" = "yes"; then
    tst_glibc_strerror_r="no"
  fi
  if test "$tst_glibc_strerror_r" = "yes" &&
    test "$tst_works_glibc_strerror_r" != "no" &&
    test "$tst_posix_strerror_r" != "yes"; then
    tst_allow_strerror_r="check"
  fi
  if test "$tst_posix_strerror_r" = "yes" &&
    test "$tst_works_posix_strerror_r" != "no" &&
    test "$tst_glibc_strerror_r" != "yes"; then
    tst_allow_strerror_r="check"
  fi
  if test "$tst_allow_strerror_r" = "check"; then
    AC_MSG_CHECKING([if strerror_r usage allowed])
    if test "x$curl_disallow_strerror_r" != "xyes"; then
      AC_MSG_RESULT([yes])
      tst_allow_strerror_r="yes"
    else
      AC_MSG_RESULT([no])
      tst_allow_strerror_r="no"
    fi
  fi
  #
  AC_MSG_CHECKING([if strerror_r might be used])
  if test "$tst_links_strerror_r" = "yes" &&
     test "$tst_proto_strerror_r" = "yes" &&
     test "$tst_compi_strerror_r" = "yes" &&
     test "$tst_allow_strerror_r" = "yes"; then
    AC_MSG_RESULT([yes])
    if test "$tst_glibc_strerror_r" = "yes"; then
      AC_DEFINE_UNQUOTED(HAVE_STRERROR_R, 1,
        [Define to 1 if you have the strerror_r function.])
      AC_DEFINE_UNQUOTED(HAVE_GLIBC_STRERROR_R, 1,
        [Define to 1 if you have a working glibc-style strerror_r function.])
      AC_DEFINE_UNQUOTED(STRERROR_R_TYPE_ARG3, $tst_glibc_strerror_r_type_arg3,
        [Define to the type of arg 3 for strerror_r.])
    fi
    if test "$tst_posix_strerror_r" = "yes"; then
      AC_DEFINE_UNQUOTED(HAVE_STRERROR_R, 1,
        [Define to 1 if you have the strerror_r function.])
      AC_DEFINE_UNQUOTED(HAVE_POSIX_STRERROR_R, 1,
        [Define to 1 if you have a working POSIX-style strerror_r function.])
      AC_DEFINE_UNQUOTED(STRERROR_R_TYPE_ARG3, $tst_posix_strerror_r_type_arg3,
        [Define to the type of arg 3 for strerror_r.])
    fi
    ac_cv_func_strerror_r="yes"
  else
    AC_MSG_RESULT([no])
    ac_cv_func_strerror_r="no"
  fi
  #
  if test "$tst_compi_strerror_r" = "yes" &&
     test "$tst_allow_strerror_r" = "unknown"; then
    AC_MSG_NOTICE([cannot determine strerror_r() style: edit lib/config.h manually.])
  fi
  #
])


dnl CURL_CHECK_FUNC_STRICMP
dnl -------------------------------------------------
dnl Verify if stricmp 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_stricmp, then
dnl HAVE_STRICMP will be defined.

AC_DEFUN([CURL_CHECK_FUNC_STRICMP], [
  AC_REQUIRE([CURL_INCLUDES_STRING])dnl
  #
  tst_links_stricmp="unknown"
  tst_proto_stricmp="unknown"
  tst_compi_stricmp="unknown"
  tst_allow_stricmp="unknown"
  #
  AC_MSG_CHECKING([if stricmp can be linked])
  AC_LINK_IFELSE([
    AC_LANG_FUNC_LINK_TRY([stricmp])
  ],[
    AC_MSG_RESULT([yes])
    tst_links_stricmp="yes"
  ],[
    AC_MSG_RESULT([no])
    tst_links_stricmp="no"
  ])
  #
  if test "$tst_links_stricmp" = "yes"; then
    AC_MSG_CHECKING([if stricmp is prototyped])
    AC_EGREP_CPP([stricmp],[
      $curl_includes_string
    ],[
      AC_MSG_RESULT([yes])
      tst_proto_stricmp="yes"
    ],[
      AC_MSG_RESULT([no])
      tst_proto_stricmp="no"
    ])
  fi
  #
  if test "$tst_proto_stricmp" = "yes"; then
    AC_MSG_CHECKING([if stricmp is compilable])
    AC_COMPILE_IFELSE([
      AC_LANG_PROGRAM([[
        $curl_includes_string
      ]],[[
        if(0 != stricmp(0, 0))
          return 1;
      ]])
    ],[
      AC_MSG_RESULT([yes])
      tst_compi_stricmp="yes"
    ],[
      AC_MSG_RESULT([no])
      tst_compi_stricmp="no"
    ])
  fi
  #
  if test "$tst_compi_stricmp" = "yes"; then
    AC_MSG_CHECKING([if stricmp usage allowed])
    if test "x$curl_disallow_stricmp" != "xyes"; then
      AC_MSG_RESULT([yes])
      tst_allow_stricmp="yes"
    else
      AC_MSG_RESULT([no])
      tst_allow_stricmp="no"
    fi
  fi
  #
  AC_MSG_CHECKING([if stricmp might be used])
  if test "$tst_links_stricmp" = "yes" &&
     test "$tst_proto_stricmp" = "yes" &&
     test "$tst_compi_stricmp" = "yes" &&
     test "$tst_allow_stricmp" = "yes"; then
    AC_MSG_RESULT([yes])
    AC_DEFINE_UNQUOTED(HAVE_STRICMP, 1,
      [Define to 1 if you have the stricmp function.])
    ac_cv_func_stricmp="yes"
  else
    AC_MSG_RESULT([no])
    ac_cv_func_stricmp="no"
  fi
])


dnl CURL_CHECK_FUNC_STRLCAT
dnl -------------------------------------------------
dnl Verify if strlcat 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_strlcat, then
dnl HAVE_STRLCAT will be defined.

AC_DEFUN([CURL_CHECK_FUNC_STRLCAT], [
  AC_REQUIRE([CURL_INCLUDES_STRING])dnl
  #
  tst_links_strlcat="unknown"
  tst_proto_strlcat="unknown"
  tst_compi_strlcat="unknown"
  tst_allow_strlcat="unknown"
  #
  AC_MSG_CHECKING([if strlcat can be linked])
  AC_LINK_IFELSE([
    AC_LANG_FUNC_LINK_TRY([strlcat])
  ],[
    AC_MSG_RESULT([yes])
    tst_links_strlcat="yes"
  ],[
    AC_MSG_RESULT([no])
    tst_links_strlcat="no"
  ])
  #
  if test "$tst_links_strlcat" = "yes"; then
    AC_MSG_CHECKING([if strlcat is prototyped])
    AC_EGREP_CPP([strlcat],[
      $curl_includes_string
    ],[
      AC_MSG_RESULT([yes])
      tst_proto_strlcat="yes"
    ],[
      AC_MSG_RESULT([no])
      tst_proto_strlcat="no"
    ])
  fi
  #
  if test "$tst_proto_strlcat" = "yes"; then
    AC_MSG_CHECKING([if strlcat is compilable])
    AC_COMPILE_IFELSE([
      AC_LANG_PROGRAM([[
        $curl_includes_string
      ]],[[
        if(0 != strlcat(0, 0, 0))
          return 1;
      ]])
    ],[
      AC_MSG_RESULT([yes])
      tst_compi_strlcat="yes"
    ],[
      AC_MSG_RESULT([no])
      tst_compi_strlcat="no"
    ])
  fi
  #
  if test "$tst_compi_strlcat" = "yes"; then
    AC_MSG_CHECKING([if strlcat usage allowed])
    if test "x$curl_disallow_strlcat" != "xyes"; then
      AC_MSG_RESULT([yes])
      tst_allow_strlcat="yes"
    else
      AC_MSG_RESULT([no])
      tst_allow_strlcat="no"
    fi
  fi
  #
  AC_MSG_CHECKING([if strlcat might be used])
  if test "$tst_links_strlcat" = "yes" &&
     test "$tst_proto_strlcat" = "yes" &&
     test "$tst_compi_strlcat" = "yes" &&
     test "$tst_allow_strlcat" = "yes"; then
    AC_MSG_RESULT([yes])
    AC_DEFINE_UNQUOTED(HAVE_STRLCAT, 1,
      [Define to 1 if you have the strlcat function.])
    ac_cv_func_strlcat="yes"
  else
    AC_MSG_RESULT([no])
    ac_cv_func_strlcat="no"
  fi
])


dnl CURL_CHECK_FUNC_STRNCASECMP
dnl -------------------------------------------------
dnl Verify if strncasecmp 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_strncasecmp, then
dnl HAVE_STRNCASECMP will be defined.

AC_DEFUN([CURL_CHECK_FUNC_STRNCASECMP], [
  AC_REQUIRE([CURL_INCLUDES_STRING])dnl
  #
  tst_links_strncasecmp="unknown"
  tst_proto_strncasecmp="unknown"
  tst_compi_strncasecmp="unknown"
  tst_allow_strncasecmp="unknown"
  #
  AC_MSG_CHECKING([if strncasecmp can be linked])
  AC_LINK_IFELSE([
    AC_LANG_FUNC_LINK_TRY([strncasecmp])
  ],[
    AC_MSG_RESULT([yes])
    tst_links_strncasecmp="yes"
  ],[
    AC_MSG_RESULT([no])
    tst_links_strncasecmp="no"
  ])
  #
  if test "$tst_links_strncasecmp" = "yes"; then
    AC_MSG_CHECKING([if strncasecmp is prototyped])
    AC_EGREP_CPP([strncasecmp],[
      $curl_includes_string
    ],[
      AC_MSG_RESULT([yes])
      tst_proto_strncasecmp="yes"
    ],[
      AC_MSG_RESULT([no])
      tst_proto_strncasecmp="no"
    ])
  fi
  #
  if test "$tst_proto_strncasecmp" = "yes"; then
    AC_MSG_CHECKING([if strncasecmp is compilable])
    AC_COMPILE_IFELSE([
      AC_LANG_PROGRAM([[
        $curl_includes_string
      ]],[[
        if(0 != strncasecmp(0, 0, 0))
          return 1;
      ]])
    ],[
      AC_MSG_RESULT([yes])
      tst_compi_strncasecmp="yes"
    ],[
      AC_MSG_RESULT([no])
      tst_compi_strncasecmp="no"
    ])
  fi
  #
  if test "$tst_compi_strncasecmp" = "yes"; then
    AC_MSG_CHECKING([if strncasecmp usage allowed])
    if test "x$curl_disallow_strncasecmp" != "xyes"; then
      AC_MSG_RESULT([yes])
      tst_allow_strncasecmp="yes"
    else
      AC_MSG_RESULT([no])
      tst_allow_strncasecmp="no"
    fi
  fi
  #
  AC_MSG_CHECKING([if strncasecmp might be used])
  if test "$tst_links_strncasecmp" = "yes" &&
     test "$tst_proto_strncasecmp" = "yes" &&
     test "$tst_compi_strncasecmp" = "yes" &&
     test "$tst_allow_strncasecmp" = "yes"; then
    AC_MSG_RESULT([yes])
    AC_DEFINE_UNQUOTED(HAVE_STRNCASECMP, 1,
      [Define to 1 if you have the strncasecmp function.])
    ac_cv_func_strncasecmp="yes"
  else
    AC_MSG_RESULT([no])
    ac_cv_func_strncasecmp="no"
  fi
])


dnl CURL_CHECK_FUNC_STRNCMPI
dnl -------------------------------------------------
dnl Verify if strncmpi 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_strncmpi, then
dnl HAVE_STRNCMPI will be defined.

AC_DEFUN([CURL_CHECK_FUNC_STRNCMPI], [
  AC_REQUIRE([CURL_INCLUDES_STRING])dnl
  #
  tst_links_strncmpi="unknown"
  tst_proto_strncmpi="unknown"
  tst_compi_strncmpi="unknown"
  tst_allow_strncmpi="unknown"
  #
  AC_MSG_CHECKING([if strncmpi can be linked])
  AC_LINK_IFELSE([
    AC_LANG_FUNC_LINK_TRY([strncmpi])
  ],[
    AC_MSG_RESULT([yes])
    tst_links_strncmpi="yes"
  ],[
    AC_MSG_RESULT([no])
    tst_links_strncmpi="no"
  ])
  #
  if test "$tst_links_strncmpi" = "yes"; then
    AC_MSG_CHECKING([if strncmpi is prototyped])
    AC_EGREP_CPP([strncmpi],[
      $curl_includes_string
    ],[
      AC_MSG_RESULT([yes])
      tst_proto_strncmpi="yes"
    ],[
      AC_MSG_RESULT([no])
      tst_proto_strncmpi="no"
    ])
  fi
  #
  if test "$tst_proto_strncmpi" = "yes"; then
    AC_MSG_CHECKING([if strncmpi is compilable])
    AC_COMPILE_IFELSE([
      AC_LANG_PROGRAM([[
        $curl_includes_string
      ]],[[
        if(0 != strncmpi(0, 0))
          return 1;
      ]])
    ],[
      AC_MSG_RESULT([yes])
      tst_compi_strncmpi="yes"
    ],[
      AC_MSG_RESULT([no])
      tst_compi_strncmpi="no"
    ])
  fi
  #
  if test "$tst_compi_strncmpi" = "yes"; then
    AC_MSG_CHECKING([if strncmpi usage allowed])
    if test "x$curl_disallow_strncmpi" != "xyes"; then
      AC_MSG_RESULT([yes])
      tst_allow_strncmpi="yes"
    else
      AC_MSG_RESULT([no])
      tst_allow_strncmpi="no"
    fi
  fi
  #
  AC_MSG_CHECKING([if strncmpi might be used])
  if test "$tst_links_strncmpi" = "yes" &&
     test "$tst_proto_strncmpi" = "yes" &&
     test "$tst_compi_strncmpi" = "yes" &&
     test "$tst_allow_strncmpi" = "yes"; then
    AC_MSG_RESULT([yes])
    AC_DEFINE_UNQUOTED(HAVE_STRNCMPI, 1,
      [Define to 1 if you have the strncmpi function.])
    ac_cv_func_strncmpi="yes"
  else
    AC_MSG_RESULT([no])
    ac_cv_func_strncmpi="no"
  fi
])


dnl CURL_CHECK_FUNC_STRNICMP
dnl -------------------------------------------------
dnl Verify if strnicmp 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_strnicmp, then
dnl HAVE_STRNICMP will be defined.

AC_DEFUN([CURL_CHECK_FUNC_STRNICMP], [
  AC_REQUIRE([CURL_INCLUDES_STRING])dnl
  #
  tst_links_strnicmp="unknown"
  tst_proto_strnicmp="unknown"
  tst_compi_strnicmp="unknown"
  tst_allow_strnicmp="unknown"
  #
  AC_MSG_CHECKING([if strnicmp can be linked])
  AC_LINK_IFELSE([
    AC_LANG_FUNC_LINK_TRY([strnicmp])
  ],[
    AC_MSG_RESULT([yes])
    tst_links_strnicmp="yes"
  ],[
    AC_MSG_RESULT([no])
    tst_links_strnicmp="no"
  ])
  #
  if test "$tst_links_strnicmp" = "yes"; then
    AC_MSG_CHECKING([if strnicmp is prototyped])
    AC_EGREP_CPP([strnicmp],[
      $curl_includes_string
    ],[
      AC_MSG_RESULT([yes])
      tst_proto_strnicmp="yes"
    ],[
      AC_MSG_RESULT([no])
      tst_proto_strnicmp="no"
    ])
  fi
  #
  if test "$tst_proto_strnicmp" = "yes"; then
    AC_MSG_CHECKING([if strnicmp is compilable])
    AC_COMPILE_IFELSE([
      AC_LANG_PROGRAM([[
        $curl_includes_string
      ]],[[
        if(0 != strnicmp(0, 0))
          return 1;
      ]])
    ],[
      AC_MSG_RESULT([yes])
      tst_compi_strnicmp="yes"
    ],[
      AC_MSG_RESULT([no])
      tst_compi_strnicmp="no"
    ])
  fi
  #
  if test "$tst_compi_strnicmp" = "yes"; then
    AC_MSG_CHECKING([if strnicmp usage allowed])
    if test "x$curl_disallow_strnicmp" != "xyes"; then
      AC_MSG_RESULT([yes])
      tst_allow_strnicmp="yes"
    else
      AC_MSG_RESULT([no])
      tst_allow_strnicmp="no"
    fi
  fi
  #
  AC_MSG_CHECKING([if strnicmp might be used])
  if test "$tst_links_strnicmp" = "yes" &&
     test "$tst_proto_strnicmp" = "yes" &&
     test "$tst_compi_strnicmp" = "yes" &&
     test "$tst_allow_strnicmp" = "yes"; then
    AC_MSG_RESULT([yes])
    AC_DEFINE_UNQUOTED(HAVE_STRNICMP, 1,
      [Define to 1 if you have the strnicmp function.])
    ac_cv_func_strnicmp="yes"
  else
    AC_MSG_RESULT([no])
    ac_cv_func_strnicmp="no"
  fi
])


dnl CURL_CHECK_FUNC_STRSTR
dnl -------------------------------------------------
dnl Verify if strstr 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_strstr, then
dnl HAVE_STRSTR will be defined.

AC_DEFUN([CURL_CHECK_FUNC_STRSTR], [
  AC_REQUIRE([CURL_INCLUDES_STRING])dnl
  #
  tst_links_strstr="unknown"
  tst_proto_strstr="unknown"
  tst_compi_strstr="unknown"
  tst_allow_strstr="unknown"
  #
  AC_MSG_CHECKING([if strstr can be linked])
  AC_LINK_IFELSE([
    AC_LANG_FUNC_LINK_TRY([strstr])
  ],[
    AC_MSG_RESULT([yes])
    tst_links_strstr="yes"
  ],[
    AC_MSG_RESULT([no])
    tst_links_strstr="no"
  ])
  #
  if test "$tst_links_strstr" = "yes"; then
    AC_MSG_CHECKING([if strstr is prototyped])
    AC_EGREP_CPP([strstr],[
      $curl_includes_string
    ],[
      AC_MSG_RESULT([yes])
      tst_proto_strstr="yes"
    ],[
      AC_MSG_RESULT([no])
      tst_proto_strstr="no"
    ])
  fi
  #
  if test "$tst_proto_strstr" = "yes"; then
    AC_MSG_CHECKING([if strstr is compilable])
    AC_COMPILE_IFELSE([
      AC_LANG_PROGRAM([[
        $curl_includes_string
      ]],[[
        if(0 != strstr(0, 0))
          return 1;
      ]])
    ],[
      AC_MSG_RESULT([yes])
      tst_compi_strstr="yes"
    ],[
      AC_MSG_RESULT([no])
      tst_compi_strstr="no"
    ])
  fi
  #
  if test "$tst_compi_strstr" = "yes"; then
    AC_MSG_CHECKING([if strstr usage allowed])
    if test "x$curl_disallow_strstr" != "xyes"; then
      AC_MSG_RESULT([yes])
      tst_allow_strstr="yes"
    else
      AC_MSG_RESULT([no])
      tst_allow_strstr="no"
    fi
  fi
  #
  AC_MSG_CHECKING([if strstr might be used])
  if test "$tst_links_strstr" = "yes" &&
     test "$tst_proto_strstr" = "yes" &&
     test "$tst_compi_strstr" = "yes" &&
     test "$tst_allow_strstr" = "yes"; then
    AC_MSG_RESULT([yes])
    AC_DEFINE_UNQUOTED(HAVE_STRSTR, 1,
      [Define to 1 if you have the strstr function.])
    ac_cv_func_strstr="yes"
  else
    AC_MSG_RESULT([no])
    ac_cv_func_strstr="no"
  fi
])


dnl CURL_CHECK_FUNC_STRTOK_R
dnl -------------------------------------------------
dnl Verify if strtok_r 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_strtok_r, then
dnl HAVE_STRTOK_R will be defined.

AC_DEFUN([CURL_CHECK_FUNC_STRTOK_R], [
  AC_REQUIRE([CURL_INCLUDES_STRING])dnl
  #
  tst_links_strtok_r="unknown"
  tst_proto_strtok_r="unknown"
  tst_compi_strtok_r="unknown"
  tst_allow_strtok_r="unknown"
  #
  AC_MSG_CHECKING([if strtok_r can be linked])
  AC_LINK_IFELSE([
    AC_LANG_FUNC_LINK_TRY([strtok_r])
  ],[
    AC_MSG_RESULT([yes])
    tst_links_strtok_r="yes"
  ],[
    AC_MSG_RESULT([no])
    tst_links_strtok_r="no"
  ])
  #
  if test "$tst_links_strtok_r" = "yes"; then
    AC_MSG_CHECKING([if strtok_r is prototyped])
    AC_EGREP_CPP([strtok_r],[
      $curl_includes_string
    ],[
      AC_MSG_RESULT([yes])
      tst_proto_strtok_r="yes"
    ],[
      AC_MSG_RESULT([no])
      tst_proto_strtok_r="no"
    ])
  fi
  #
  if test "$tst_proto_strtok_r" = "yes"; then
    AC_MSG_CHECKING([if strtok_r is compilable])
    AC_COMPILE_IFELSE([
      AC_LANG_PROGRAM([[
        $curl_includes_string
      ]],[[
        if(0 != strtok_r(0, 0, 0))
          return 1;
      ]])
    ],[
      AC_MSG_RESULT([yes])
      tst_compi_strtok_r="yes"
    ],[
      AC_MSG_RESULT([no])
      tst_compi_strtok_r="no"
    ])
  fi
  #
  if test "$tst_compi_strtok_r" = "yes"; then
    AC_MSG_CHECKING([if strtok_r usage allowed])
    if test "x$curl_disallow_strtok_r" != "xyes"; then
      AC_MSG_RESULT([yes])
      tst_allow_strtok_r="yes"
    else
      AC_MSG_RESULT([no])
      tst_allow_strtok_r="no"
    fi
  fi
  #
  AC_MSG_CHECKING([if strtok_r might be used])
  if test "$tst_links_strtok_r" = "yes" &&
     test "$tst_proto_strtok_r" = "yes" &&
     test "$tst_compi_strtok_r" = "yes" &&
     test "$tst_allow_strtok_r" = "yes"; then
    AC_MSG_RESULT([yes])
    AC_DEFINE_UNQUOTED(HAVE_STRTOK_R, 1,
      [Define to 1 if you have the strtok_r function.])
    ac_cv_func_strtok_r="yes"
  else
    AC_MSG_RESULT([no])
    ac_cv_func_strtok_r="no"
  fi
])


dnl CURL_CHECK_FUNC_STRTOLL
dnl -------------------------------------------------
dnl Verify if strtoll 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_strtoll, then
dnl HAVE_STRTOLL will be defined.

AC_DEFUN([CURL_CHECK_FUNC_STRTOLL], [
  AC_REQUIRE([CURL_INCLUDES_STDLIB])dnl
  #
  tst_links_strtoll="unknown"
  tst_proto_strtoll="unknown"
  tst_compi_strtoll="unknown"
  tst_allow_strtoll="unknown"
  #
  AC_MSG_CHECKING([if strtoll can be linked])
  AC_LINK_IFELSE([
    AC_LANG_FUNC_LINK_TRY([strtoll])
  ],[
    AC_MSG_RESULT([yes])
    tst_links_strtoll="yes"
  ],[
    AC_MSG_RESULT([no])
    tst_links_strtoll="no"
  ])
  #
  if test "$tst_links_strtoll" = "yes"; then
    AC_MSG_CHECKING([if strtoll is prototyped])
    AC_EGREP_CPP([strtoll],[
      $curl_includes_stdlib
    ],[
      AC_MSG_RESULT([yes])
      tst_proto_strtoll="yes"
    ],[
      AC_MSG_RESULT([no])
      tst_proto_strtoll="no"
    ])
  fi
  #
  if test "$tst_proto_strtoll" = "yes"; then
    AC_MSG_CHECKING([if strtoll is compilable])
    AC_COMPILE_IFELSE([
      AC_LANG_PROGRAM([[
        $curl_includes_stdlib
      ]],[[
        if(0 != strtoll(0, 0, 0))
          return 1;
      ]])
    ],[
      AC_MSG_RESULT([yes])
      tst_compi_strtoll="yes"
    ],[
      AC_MSG_RESULT([no])
      tst_compi_strtoll="no"
    ])
  fi
  #
  if test "$tst_compi_strtoll" = "yes"; then
    AC_MSG_CHECKING([if strtoll usage allowed])
    if test "x$curl_disallow_strtoll" != "xyes"; then
      AC_MSG_RESULT([yes])
      tst_allow_strtoll="yes"
    else
      AC_MSG_RESULT([no])
      tst_allow_strtoll="no"
    fi
  fi
  #
  AC_MSG_CHECKING([if strtoll might be used])
  if test "$tst_links_strtoll" = "yes" &&
     test "$tst_proto_strtoll" = "yes" &&
     test "$tst_compi_strtoll" = "yes" &&
     test "$tst_allow_strtoll" = "yes"; then
    AC_MSG_RESULT([yes])
    AC_DEFINE_UNQUOTED(HAVE_STRTOLL, 1,
      [Define to 1 if you have the strtoll function.])
    ac_cv_func_strtoll="yes"
  else
    AC_MSG_RESULT([no])
    ac_cv_func_strtoll="no"
  fi
])


dnl CURL_CHECK_FUNC_WRITEV
dnl -------------------------------------------------
dnl Verify if writev 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_writev, then
dnl HAVE_WRITEV will be defined.

AC_DEFUN([CURL_CHECK_FUNC_WRITEV], [
  AC_REQUIRE([CURL_INCLUDES_SYS_UIO])dnl
  #
  tst_links_writev="unknown"
  tst_proto_writev="unknown"
  tst_compi_writev="unknown"
  tst_allow_writev="unknown"
  #
  AC_MSG_CHECKING([if writev can be linked])
  AC_LINK_IFELSE([
    AC_LANG_FUNC_LINK_TRY([writev])
  ],[
    AC_MSG_RESULT([yes])
    tst_links_writev="yes"
  ],[
    AC_MSG_RESULT([no])
    tst_links_writev="no"
  ])
  #
  if test "$tst_links_writev" = "yes"; then
    AC_MSG_CHECKING([if writev is prototyped])
    AC_EGREP_CPP([writev],[
      $curl_includes_sys_uio
    ],[
      AC_MSG_RESULT([yes])
      tst_proto_writev="yes"
    ],[
      AC_MSG_RESULT([no])
      tst_proto_writev="no"
    ])
  fi
  #
  if test "$tst_proto_writev" = "yes"; then
    AC_MSG_CHECKING([if writev is compilable])
    AC_COMPILE_IFELSE([
      AC_LANG_PROGRAM([[
        $curl_includes_sys_uio
      ]],[[
        if(0 != writev(0, 0, 0))
          return 1;
      ]])
    ],[
      AC_MSG_RESULT([yes])
      tst_compi_writev="yes"
    ],[
      AC_MSG_RESULT([no])
      tst_compi_writev="no"
    ])
  fi
  #
  if test "$tst_compi_writev" = "yes"; then
    AC_MSG_CHECKING([if writev usage allowed])
    if test "x$curl_disallow_writev" != "xyes"; then
      AC_MSG_RESULT([yes])
      tst_allow_writev="yes"
    else
      AC_MSG_RESULT([no])
      tst_allow_writev="no"
    fi
  fi
  #
  AC_MSG_CHECKING([if writev might be used])
  if test "$tst_links_writev" = "yes" &&
     test "$tst_proto_writev" = "yes" &&
     test "$tst_compi_writev" = "yes" &&
     test "$tst_allow_writev" = "yes"; then
    AC_MSG_RESULT([yes])
    AC_DEFINE_UNQUOTED(HAVE_WRITEV, 1,
      [Define to 1 if you have the writev function.])
    ac_cv_func_writev="yes"
  else
    AC_MSG_RESULT([no])
    ac_cv_func_writev="no"
  fi
])