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annotate m4/iconv.m4 @ 309:4fd5197aacc2

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fix charset issue with iconv return value
author Carl Byington <carl@five-ten-sg.com>
date Mon, 14 Dec 2009 22:19:50 -0800
parents 0b1766da9be8
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
153
0b1766da9be8 use AM_ICONV for better portability of the library location.
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diff changeset
1 # iconv.m4 serial AM7 (gettext-0.18)
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2 dnl Copyright (C) 2000-2002, 2007-2009 Free Software Foundation, Inc.
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3 dnl This file is free software; the Free Software Foundation
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4 dnl gives unlimited permission to copy and/or distribute it,
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5 dnl with or without modifications, as long as this notice is preserved.
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6
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7 dnl From Bruno Haible.
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8
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9 AC_DEFUN([AM_ICONV_LINKFLAGS_BODY],
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10 [
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11 dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
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12 AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
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13 AC_REQUIRE([AC_LIB_RPATH])
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14
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15 dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
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16 dnl accordingly.
0b1766da9be8 use AM_ICONV for better portability of the library location.
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17 AC_LIB_LINKFLAGS_BODY([iconv])
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18 ])
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19
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20 AC_DEFUN([AM_ICONV_LINK],
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21 [
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22 dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
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23 dnl those with the standalone portable GNU libiconv installed).
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24 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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25
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26 dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
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27 dnl accordingly.
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28 AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
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29
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30 dnl Add $INCICONV to CPPFLAGS before performing the following checks,
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31 dnl because if the user has installed libiconv and not disabled its use
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32 dnl via --without-libiconv-prefix, he wants to use it. The first
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33 dnl AC_TRY_LINK will then fail, the second AC_TRY_LINK will succeed.
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34 am_save_CPPFLAGS="$CPPFLAGS"
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35 AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])
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36
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37 AC_CACHE_CHECK([for iconv], [am_cv_func_iconv], [
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38 am_cv_func_iconv="no, consider installing GNU libiconv"
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39 am_cv_lib_iconv=no
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40 AC_TRY_LINK([#include <stdlib.h>
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41 #include <iconv.h>],
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42 [iconv_t cd = iconv_open("","");
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43 iconv(cd,NULL,NULL,NULL,NULL);
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44 iconv_close(cd);],
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45 [am_cv_func_iconv=yes])
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46 if test "$am_cv_func_iconv" != yes; then
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47 am_save_LIBS="$LIBS"
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48 LIBS="$LIBS $LIBICONV"
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49 AC_TRY_LINK([#include <stdlib.h>
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50 #include <iconv.h>],
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51 [iconv_t cd = iconv_open("","");
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52 iconv(cd,NULL,NULL,NULL,NULL);
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53 iconv_close(cd);],
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54 [am_cv_lib_iconv=yes]
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55 [am_cv_func_iconv=yes])
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56 LIBS="$am_save_LIBS"
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57 fi
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58 ])
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59 if test "$am_cv_func_iconv" = yes; then
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60 AC_CACHE_CHECK([for working iconv], [am_cv_func_iconv_works], [
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61 dnl This tests against bugs in AIX 5.1 and HP-UX 11.11.
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62 am_save_LIBS="$LIBS"
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63 if test $am_cv_lib_iconv = yes; then
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64 LIBS="$LIBS $LIBICONV"
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65 fi
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66 AC_TRY_RUN([
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67 #include <iconv.h>
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68 #include <string.h>
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69 int main ()
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70 {
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71 /* Test against AIX 5.1 bug: Failures are not distinguishable from successful
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72 returns. */
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73 {
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74 iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8");
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75 if (cd_utf8_to_88591 != (iconv_t)(-1))
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76 {
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77 static const char input[] = "\342\202\254"; /* EURO SIGN */
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78 char buf[10];
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79 const char *inptr = input;
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80 size_t inbytesleft = strlen (input);
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81 char *outptr = buf;
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82 size_t outbytesleft = sizeof (buf);
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83 size_t res = iconv (cd_utf8_to_88591,
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84 (char **) &inptr, &inbytesleft,
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85 &outptr, &outbytesleft);
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86 if (res == 0)
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87 return 1;
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88 }
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89 }
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90 #if 0 /* This bug could be worked around by the caller. */
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91 /* Test against HP-UX 11.11 bug: Positive return value instead of 0. */
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92 {
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93 iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591");
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94 if (cd_88591_to_utf8 != (iconv_t)(-1))
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95 {
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96 static const char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
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97 char buf[50];
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98 const char *inptr = input;
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99 size_t inbytesleft = strlen (input);
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100 char *outptr = buf;
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101 size_t outbytesleft = sizeof (buf);
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102 size_t res = iconv (cd_88591_to_utf8,
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103 (char **) &inptr, &inbytesleft,
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104 &outptr, &outbytesleft);
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105 if ((int)res > 0)
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106 return 1;
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107 }
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108 }
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109 #endif
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110 /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is
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111 provided. */
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112 if (/* Try standardized names. */
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113 iconv_open ("UTF-8", "EUC-JP") == (iconv_t)(-1)
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114 /* Try IRIX, OSF/1 names. */
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115 && iconv_open ("UTF-8", "eucJP") == (iconv_t)(-1)
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116 /* Try AIX names. */
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117 && iconv_open ("UTF-8", "IBM-eucJP") == (iconv_t)(-1)
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118 /* Try HP-UX names. */
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119 && iconv_open ("utf8", "eucJP") == (iconv_t)(-1))
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120 return 1;
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121 return 0;
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122 }], [am_cv_func_iconv_works=yes], [am_cv_func_iconv_works=no],
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123 [case "$host_os" in
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124 aix* | hpux*) am_cv_func_iconv_works="guessing no" ;;
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125 *) am_cv_func_iconv_works="guessing yes" ;;
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126 esac])
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127 LIBS="$am_save_LIBS"
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128 ])
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129 case "$am_cv_func_iconv_works" in
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130 *no) am_func_iconv=no am_cv_lib_iconv=no ;;
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131 *) am_func_iconv=yes ;;
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132 esac
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133 else
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134 am_func_iconv=no am_cv_lib_iconv=no
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135 fi
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136 if test "$am_func_iconv" = yes; then
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137 AC_DEFINE([HAVE_ICONV], [1],
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138 [Define if you have the iconv() function and it works.])
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139 fi
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140 if test "$am_cv_lib_iconv" = yes; then
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141 AC_MSG_CHECKING([how to link with libiconv])
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142 AC_MSG_RESULT([$LIBICONV])
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143 else
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144 dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
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145 dnl either.
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146 CPPFLAGS="$am_save_CPPFLAGS"
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147 LIBICONV=
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148 LTLIBICONV=
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149 fi
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150 AC_SUBST([LIBICONV])
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151 AC_SUBST([LTLIBICONV])
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152 ])
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153
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154 AC_DEFUN([AM_ICONV],
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155 [
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156 AM_ICONV_LINK
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157 if test "$am_cv_func_iconv" = yes; then
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158 AC_MSG_CHECKING([for iconv declaration])
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159 AC_CACHE_VAL([am_cv_proto_iconv], [
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160 AC_TRY_COMPILE([
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161 #include <stdlib.h>
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162 #include <iconv.h>
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163 extern
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164 #ifdef __cplusplus
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165 "C"
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166 #endif
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167 #if defined(__STDC__) || defined(__cplusplus)
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168 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
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169 #else
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170 size_t iconv();
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171 #endif
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172 ], [], [am_cv_proto_iconv_arg1=""], [am_cv_proto_iconv_arg1="const"])
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173 am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
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174 am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
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175 AC_MSG_RESULT([${ac_t:-
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176 }$am_cv_proto_iconv])
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177 AC_DEFINE_UNQUOTED([ICONV_CONST], [$am_cv_proto_iconv_arg1],
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178 [Define as const if the declaration of iconv() needs const.])
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179 fi
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180 ])