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annotate m4/iconv.m4 @ 15426:60c6b6da0198

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ffs: avoid undefined behavior * lib/ffs.c (ffs): Provide fallback for non-32-bit int. * tests/test-ffs.c (naive, main): Avoid signed shifts. Reported by Bruno Haible. Signed-off-by: Eric Blake <eblake@redhat.com>
author Eric Blake <eblake@redhat.com>
date Fri, 15 Jul 2011 14:26:43 -0600
parents 97fc9a21a8fb
children e36ea7b17143
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 # iconv.m4 serial 17 (gettext-0.18.2)
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2 dnl Copyright (C) 2000-2002, 2007-2011 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.
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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 $INCICONV to CPPFLAGS before performing the following checks,
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31 dnl because if the user has installed libiconv and not disabled its use
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32 dnl via --without-libiconv-prefix, he wants to use it. The first
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33 dnl AC_LINK_IFELSE will then fail, the second AC_LINK_IFELSE will succeed.
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34 am_save_CPPFLAGS="$CPPFLAGS"
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35 AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])
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36
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37 AC_CACHE_CHECK([for iconv], [am_cv_func_iconv], [
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38 am_cv_func_iconv="no, consider installing GNU libiconv"
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39 am_cv_lib_iconv=no
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40 AC_LINK_IFELSE(
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41 [AC_LANG_PROGRAM(
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42 [[
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43 #include <stdlib.h>
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44 #include <iconv.h>
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45 ]],
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46 [[iconv_t cd = iconv_open("","");
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47 iconv(cd,NULL,NULL,NULL,NULL);
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48 iconv_close(cd);]])],
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49 [am_cv_func_iconv=yes])
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50 if test "$am_cv_func_iconv" != yes; then
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51 am_save_LIBS="$LIBS"
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52 LIBS="$LIBS $LIBICONV"
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53 AC_LINK_IFELSE(
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54 [AC_LANG_PROGRAM(
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55 [[
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56 #include <stdlib.h>
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57 #include <iconv.h>
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58 ]],
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59 [[iconv_t cd = iconv_open("","");
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60 iconv(cd,NULL,NULL,NULL,NULL);
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61 iconv_close(cd);]])],
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62 [am_cv_lib_iconv=yes]
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63 [am_cv_func_iconv=yes])
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64 LIBS="$am_save_LIBS"
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65 fi
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66 ])
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67 if test "$am_cv_func_iconv" = yes; then
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68 AC_CACHE_CHECK([for working iconv], [am_cv_func_iconv_works], [
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69 dnl This tests against bugs in AIX 5.1, AIX 6.1..7.1, HP-UX 11.11,
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70 dnl Solaris 10.
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71 am_save_LIBS="$LIBS"
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72 if test $am_cv_lib_iconv = yes; then
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73 LIBS="$LIBS $LIBICONV"
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74 fi
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75 AC_RUN_IFELSE(
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76 [AC_LANG_SOURCE([[
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77 #include <iconv.h>
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78 #include <string.h>
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79 int main ()
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80 {
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81 int result = 0;
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82 /* Test against AIX 5.1 bug: Failures are not distinguishable from successful
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83 returns. */
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84 {
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85 iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8");
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86 if (cd_utf8_to_88591 != (iconv_t)(-1))
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87 {
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88 static const char input[] = "\342\202\254"; /* EURO SIGN */
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89 char buf[10];
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90 const char *inptr = input;
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91 size_t inbytesleft = strlen (input);
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92 char *outptr = buf;
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93 size_t outbytesleft = sizeof (buf);
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94 size_t res = iconv (cd_utf8_to_88591,
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95 (char **) &inptr, &inbytesleft,
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96 &outptr, &outbytesleft);
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97 if (res == 0)
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98 result |= 1;
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99 iconv_close (cd_utf8_to_88591);
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100 }
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101 }
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102 /* Test against Solaris 10 bug: Failures are not distinguishable from
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103 successful returns. */
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104 {
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105 iconv_t cd_ascii_to_88591 = iconv_open ("ISO8859-1", "646");
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106 if (cd_ascii_to_88591 != (iconv_t)(-1))
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107 {
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108 static const char input[] = "\263";
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109 char buf[10];
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110 const char *inptr = input;
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111 size_t inbytesleft = strlen (input);
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112 char *outptr = buf;
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113 size_t outbytesleft = sizeof (buf);
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114 size_t res = iconv (cd_ascii_to_88591,
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115 (char **) &inptr, &inbytesleft,
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116 &outptr, &outbytesleft);
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117 if (res == 0)
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118 result |= 2;
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119 iconv_close (cd_ascii_to_88591);
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120 }
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121 }
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122 /* Test against AIX 6.1..7.1 bug: Buffer overrun. */
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123 {
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124 iconv_t cd_88591_to_utf8 = iconv_open ("UTF-8", "ISO-8859-1");
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125 if (cd_88591_to_utf8 != (iconv_t)(-1))
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126 {
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127 static const char input[] = "\304";
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128 static char buf[2] = { (char)0xDE, (char)0xAD };
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129 const char *inptr = input;
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130 size_t inbytesleft = 1;
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131 char *outptr = buf;
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132 size_t outbytesleft = 1;
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diff changeset
133 size_t res = iconv (cd_88591_to_utf8,
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134 (char **) &inptr, &inbytesleft,
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diff changeset
135 &outptr, &outbytesleft);
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diff changeset
136 if (res != (size_t)(-1) || outptr - buf > 1 || buf[1] != (char)0xAD)
13918
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137 result |= 4;
d5a74c6ec06b Put more information about failed tests into the test return codes.
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138 iconv_close (cd_88591_to_utf8);
13512
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139 }
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parents: 13494
diff changeset
140 }
8599
1ef5d8ed2636 Check against unusable HP-UX iconv.
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diff changeset
141 #if 0 /* This bug could be worked around by the caller. */
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diff changeset
142 /* Test against HP-UX 11.11 bug: Positive return value instead of 0. */
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diff changeset
143 {
1ef5d8ed2636 Check against unusable HP-UX iconv.
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diff changeset
144 iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591");
1ef5d8ed2636 Check against unusable HP-UX iconv.
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145 if (cd_88591_to_utf8 != (iconv_t)(-1))
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diff changeset
146 {
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diff changeset
147 static const char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
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diff changeset
148 char buf[50];
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diff changeset
149 const char *inptr = input;
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150 size_t inbytesleft = strlen (input);
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diff changeset
151 char *outptr = buf;
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diff changeset
152 size_t outbytesleft = sizeof (buf);
1ef5d8ed2636 Check against unusable HP-UX iconv.
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diff changeset
153 size_t res = iconv (cd_88591_to_utf8,
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154 (char **) &inptr, &inbytesleft,
1ef5d8ed2636 Check against unusable HP-UX iconv.
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parents: 8591
diff changeset
155 &outptr, &outbytesleft);
1ef5d8ed2636 Check against unusable HP-UX iconv.
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diff changeset
156 if ((int)res > 0)
13918
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157 result |= 8;
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diff changeset
158 iconv_close (cd_88591_to_utf8);
8599
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159 }
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parents: 8591
diff changeset
160 }
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parents: 8591
diff changeset
161 #endif
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diff changeset
162 /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is
1ef5d8ed2636 Check against unusable HP-UX iconv.
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parents: 8591
diff changeset
163 provided. */
1ef5d8ed2636 Check against unusable HP-UX iconv.
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diff changeset
164 if (/* Try standardized names. */
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diff changeset
165 iconv_open ("UTF-8", "EUC-JP") == (iconv_t)(-1)
1ef5d8ed2636 Check against unusable HP-UX iconv.
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parents: 8591
diff changeset
166 /* Try IRIX, OSF/1 names. */
1ef5d8ed2636 Check against unusable HP-UX iconv.
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parents: 8591
diff changeset
167 && iconv_open ("UTF-8", "eucJP") == (iconv_t)(-1)
1ef5d8ed2636 Check against unusable HP-UX iconv.
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parents: 8591
diff changeset
168 /* Try AIX names. */
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diff changeset
169 && iconv_open ("UTF-8", "IBM-eucJP") == (iconv_t)(-1)
1ef5d8ed2636 Check against unusable HP-UX iconv.
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diff changeset
170 /* Try HP-UX names. */
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diff changeset
171 && iconv_open ("utf8", "eucJP") == (iconv_t)(-1))
13918
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172 result |= 16;
d5a74c6ec06b Put more information about failed tests into the test return codes.
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diff changeset
173 return result;
13579
da9779900713 Modernize AC_TRY_RUN invocations.
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diff changeset
174 }]])],
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175 [am_cv_func_iconv_works=yes],
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diff changeset
176 [am_cv_func_iconv_works=no],
13494
91b50a4d7659 iconv: Update regarding AIX.
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diff changeset
177 [
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diff changeset
178 changequote(,)dnl
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diff changeset
179 case "$host_os" in
13512
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180 aix* | hpux*) am_cv_func_iconv_works="guessing no" ;;
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181 *) am_cv_func_iconv_works="guessing yes" ;;
13494
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diff changeset
182 esac
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diff changeset
183 changequote([,])dnl
91b50a4d7659 iconv: Update regarding AIX.
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diff changeset
184 ])
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185 LIBS="$am_save_LIBS"
5cba81876885 Detect broken AIX iconv() function.
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186 ])
5cba81876885 Detect broken AIX iconv() function.
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diff changeset
187 case "$am_cv_func_iconv_works" in
5cba81876885 Detect broken AIX iconv() function.
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188 *no) am_func_iconv=no am_cv_lib_iconv=no ;;
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189 *) am_func_iconv=yes ;;
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diff changeset
190 esac
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diff changeset
191 else
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192 am_func_iconv=no am_cv_lib_iconv=no
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193 fi
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194 if test "$am_func_iconv" = yes; then
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195 AC_DEFINE([HAVE_ICONV], [1],
8591
5cba81876885 Detect broken AIX iconv() function.
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196 [Define if you have the iconv() function and it works.])
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197 fi
7c1a6b73f48e An autoconf macro for its associated module.
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198 if test "$am_cv_lib_iconv" = yes; then
7c1a6b73f48e An autoconf macro for its associated module.
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199 AC_MSG_CHECKING([how to link with libiconv])
7c1a6b73f48e An autoconf macro for its associated module.
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200 AC_MSG_RESULT([$LIBICONV])
7c1a6b73f48e An autoconf macro for its associated module.
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diff changeset
201 else
7c1a6b73f48e An autoconf macro for its associated module.
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202 dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
7c1a6b73f48e An autoconf macro for its associated module.
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203 dnl either.
7c1a6b73f48e An autoconf macro for its associated module.
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204 CPPFLAGS="$am_save_CPPFLAGS"
7c1a6b73f48e An autoconf macro for its associated module.
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diff changeset
205 LIBICONV=
7c1a6b73f48e An autoconf macro for its associated module.
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diff changeset
206 LTLIBICONV=
7c1a6b73f48e An autoconf macro for its associated module.
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207 fi
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208 AC_SUBST([LIBICONV])
03e819eea554 More systematic m4 argument quoting.
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parents: 9457
diff changeset
209 AC_SUBST([LTLIBICONV])
4107
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diff changeset
210 ])
7c1a6b73f48e An autoconf macro for its associated module.
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diff changeset
211
13348
417aae33eae3 Avoid autoconf warnings about AM_ICONV.
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parents: 12551
diff changeset
212 dnl Define AM_ICONV using AC_DEFUN_ONCE for Autoconf >= 2.64, in order to
417aae33eae3 Avoid autoconf warnings about AM_ICONV.
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parents: 12551
diff changeset
213 dnl avoid warnings like
417aae33eae3 Avoid autoconf warnings about AM_ICONV.
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parents: 12551
diff changeset
214 dnl "warning: AC_REQUIRE: `AM_ICONV' was expanded before it was required".
13383
27aa5a0e75a5 Choose among AC_DEFUN_ONCE, AC_DEFUN in a way that aclocal understands.
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parents: 13348
diff changeset
215 dnl This is tricky because of the way 'aclocal' is implemented:
27aa5a0e75a5 Choose among AC_DEFUN_ONCE, AC_DEFUN in a way that aclocal understands.
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parents: 13348
diff changeset
216 dnl - It requires defining an auxiliary macro whose name ends in AC_DEFUN.
27aa5a0e75a5 Choose among AC_DEFUN_ONCE, AC_DEFUN in a way that aclocal understands.
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parents: 13348
diff changeset
217 dnl Otherwise aclocal's initial scan pass would miss the macro definition.
27aa5a0e75a5 Choose among AC_DEFUN_ONCE, AC_DEFUN in a way that aclocal understands.
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parents: 13348
diff changeset
218 dnl - It requires a line break inside the AC_DEFUN_ONCE and AC_DEFUN expansions.
27aa5a0e75a5 Choose among AC_DEFUN_ONCE, AC_DEFUN in a way that aclocal understands.
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parents: 13348
diff changeset
219 dnl Otherwise aclocal would emit many "Use of uninitialized value $1"
27aa5a0e75a5 Choose among AC_DEFUN_ONCE, AC_DEFUN in a way that aclocal understands.
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parents: 13348
diff changeset
220 dnl warnings.
27aa5a0e75a5 Choose among AC_DEFUN_ONCE, AC_DEFUN in a way that aclocal understands.
Bruno Haible <bruno@clisp.org>
parents: 13348
diff changeset
221 m4_define([gl_iconv_AC_DEFUN],
27aa5a0e75a5 Choose among AC_DEFUN_ONCE, AC_DEFUN in a way that aclocal understands.
Bruno Haible <bruno@clisp.org>
parents: 13348
diff changeset
222 m4_version_prereq([2.64],
27aa5a0e75a5 Choose among AC_DEFUN_ONCE, AC_DEFUN in a way that aclocal understands.
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parents: 13348
diff changeset
223 [[AC_DEFUN_ONCE(
27aa5a0e75a5 Choose among AC_DEFUN_ONCE, AC_DEFUN in a way that aclocal understands.
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parents: 13348
diff changeset
224 [$1], [$2])]],
13589
eb2d6ffe06bc Prefer using AC_DEFUN_ONCE over AC_DEFUN in projects with gnulib.
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parents: 13579
diff changeset
225 [m4_ifdef([gl_00GNULIB],
eb2d6ffe06bc Prefer using AC_DEFUN_ONCE over AC_DEFUN in projects with gnulib.
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parents: 13579
diff changeset
226 [[AC_DEFUN_ONCE(
eb2d6ffe06bc Prefer using AC_DEFUN_ONCE over AC_DEFUN in projects with gnulib.
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parents: 13579
diff changeset
227 [$1], [$2])]],
eb2d6ffe06bc Prefer using AC_DEFUN_ONCE over AC_DEFUN in projects with gnulib.
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parents: 13579
diff changeset
228 [[AC_DEFUN(
eb2d6ffe06bc Prefer using AC_DEFUN_ONCE over AC_DEFUN in projects with gnulib.
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parents: 13579
diff changeset
229 [$1], [$2])]])]))
13383
27aa5a0e75a5 Choose among AC_DEFUN_ONCE, AC_DEFUN in a way that aclocal understands.
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parents: 13348
diff changeset
230 gl_iconv_AC_DEFUN([AM_ICONV],
4107
7c1a6b73f48e An autoconf macro for its associated module.
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diff changeset
231 [
7c1a6b73f48e An autoconf macro for its associated module.
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parents:
diff changeset
232 AM_ICONV_LINK
7c1a6b73f48e An autoconf macro for its associated module.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
233 if test "$am_cv_func_iconv" = yes; then
7c1a6b73f48e An autoconf macro for its associated module.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
234 AC_MSG_CHECKING([for iconv declaration])
10979
03e819eea554 More systematic m4 argument quoting.
Bruno Haible <bruno@clisp.org>
parents: 9457
diff changeset
235 AC_CACHE_VAL([am_cv_proto_iconv], [
13577
d53740f6f336 Modernize AC_TRY_COMPILE invocations.
Bruno Haible <bruno@clisp.org>
parents: 13512
diff changeset
236 AC_COMPILE_IFELSE(
d53740f6f336 Modernize AC_TRY_COMPILE invocations.
Bruno Haible <bruno@clisp.org>
parents: 13512
diff changeset
237 [AC_LANG_PROGRAM(
d53740f6f336 Modernize AC_TRY_COMPILE invocations.
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parents: 13512
diff changeset
238 [[
4107
7c1a6b73f48e An autoconf macro for its associated module.
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diff changeset
239 #include <stdlib.h>
7c1a6b73f48e An autoconf macro for its associated module.
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parents:
diff changeset
240 #include <iconv.h>
7c1a6b73f48e An autoconf macro for its associated module.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
241 extern
7c1a6b73f48e An autoconf macro for its associated module.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
242 #ifdef __cplusplus
7c1a6b73f48e An autoconf macro for its associated module.
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diff changeset
243 "C"
7c1a6b73f48e An autoconf macro for its associated module.
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parents:
diff changeset
244 #endif
7c1a6b73f48e An autoconf macro for its associated module.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
245 #if defined(__STDC__) || defined(__cplusplus)
7c1a6b73f48e An autoconf macro for its associated module.
Bruno Haible <bruno@clisp.org>
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diff changeset
246 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
7c1a6b73f48e An autoconf macro for its associated module.
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diff changeset
247 #else
7c1a6b73f48e An autoconf macro for its associated module.
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diff changeset
248 size_t iconv();
7c1a6b73f48e An autoconf macro for its associated module.
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diff changeset
249 #endif
13577
d53740f6f336 Modernize AC_TRY_COMPILE invocations.
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parents: 13512
diff changeset
250 ]],
d53740f6f336 Modernize AC_TRY_COMPILE invocations.
Bruno Haible <bruno@clisp.org>
parents: 13512
diff changeset
251 [[]])],
d53740f6f336 Modernize AC_TRY_COMPILE invocations.
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parents: 13512
diff changeset
252 [am_cv_proto_iconv_arg1=""],
d53740f6f336 Modernize AC_TRY_COMPILE invocations.
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parents: 13512
diff changeset
253 [am_cv_proto_iconv_arg1="const"])
4107
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254 am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
7c1a6b73f48e An autoconf macro for its associated module.
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parents:
diff changeset
255 am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
11770
b1f6784b66bd Fix displayed message of AM_ICONV with autoconf-2.64.
Bruno Haible <bruno@clisp.org>
parents: 11007
diff changeset
256 AC_MSG_RESULT([
b1f6784b66bd Fix displayed message of AM_ICONV with autoconf-2.64.
Bruno Haible <bruno@clisp.org>
parents: 11007
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257 $am_cv_proto_iconv])
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258 AC_DEFINE_UNQUOTED([ICONV_CONST], [$am_cv_proto_iconv_arg1],
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259 [Define as const if the declaration of iconv() needs const.])
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260 dnl Also substitute ICONV_CONST in the gnulib generated <iconv.h>.
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261 m4_ifdef([gl_ICONV_H_DEFAULTS],
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262 [AC_REQUIRE([gl_ICONV_H_DEFAULTS])
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263 if test -n "$am_cv_proto_iconv_arg1"; then
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264 ICONV_CONST="const"
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265 fi
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266 ])
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267 fi
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268 ])