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862776f2 AA |
1 | # iconv.m4 serial 26 |
2 | dnl Copyright (C) 2000-2002, 2007-2014, 2016-2023 Free Software Foundation, | |
3 | dnl Inc. | |
4 | dnl This file is free software; the Free Software Foundation | |
5 | dnl gives unlimited permission to copy and/or distribute it, | |
6 | dnl with or without modifications, as long as this notice is preserved. | |
f19dd04a DD |
7 | |
8 | dnl From Bruno Haible. | |
862776f2 AA |
9 | |
10 | AC_PREREQ([2.64]) | |
11 | ||
12 | dnl Note: AM_ICONV is documented in the GNU gettext manual | |
13 | dnl <https://www.gnu.org/software/gettext/manual/html_node/AM_005fICONV.html>. | |
14 | dnl Don't make changes that are incompatible with that documentation! | |
f19dd04a DD |
15 | |
16 | AC_DEFUN([AM_ICONV_LINKFLAGS_BODY], | |
17 | [ | |
18 | dnl Prerequisites of AC_LIB_LINKFLAGS_BODY. | |
19 | AC_REQUIRE([AC_LIB_PREPARE_PREFIX]) | |
20 | AC_REQUIRE([AC_LIB_RPATH]) | |
21 | ||
22 | dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV | |
23 | dnl accordingly. | |
24 | AC_LIB_LINKFLAGS_BODY([iconv]) | |
25 | ]) | |
26 | ||
27 | AC_DEFUN([AM_ICONV_LINK], | |
28 | [ | |
29 | dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and | |
30 | dnl those with the standalone portable GNU libiconv installed). | |
862776f2 | 31 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
f19dd04a DD |
32 | |
33 | dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV | |
34 | dnl accordingly. | |
35 | AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY]) | |
36 | ||
862776f2 AA |
37 | dnl Add $INCICONV to CPPFLAGS before performing the following checks, |
38 | dnl because if the user has installed libiconv and not disabled its use | |
39 | dnl via --without-libiconv-prefix, he wants to use it. The first | |
40 | dnl AC_LINK_IFELSE will then fail, the second AC_LINK_IFELSE will succeed. | |
41 | am_save_CPPFLAGS="$CPPFLAGS" | |
42 | AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV]) | |
43 | ||
44 | AC_CACHE_CHECK([for iconv], [am_cv_func_iconv], [ | |
f19dd04a DD |
45 | am_cv_func_iconv="no, consider installing GNU libiconv" |
46 | am_cv_lib_iconv=no | |
862776f2 AA |
47 | AC_LINK_IFELSE( |
48 | [AC_LANG_PROGRAM( | |
49 | [[ | |
50 | #include <stdlib.h> | |
51 | #include <iconv.h> | |
52 | ]], | |
53 | [[iconv_t cd = iconv_open("",""); | |
cfe101c6 | 54 | iconv(cd,NULL,NULL,NULL,NULL); |
862776f2 AA |
55 | iconv_close(cd);]])], |
56 | [am_cv_func_iconv=yes]) | |
f19dd04a DD |
57 | if test "$am_cv_func_iconv" != yes; then |
58 | am_save_LIBS="$LIBS" | |
59 | LIBS="$LIBS $LIBICONV" | |
862776f2 AA |
60 | AC_LINK_IFELSE( |
61 | [AC_LANG_PROGRAM( | |
62 | [[ | |
63 | #include <stdlib.h> | |
64 | #include <iconv.h> | |
65 | ]], | |
66 | [[iconv_t cd = iconv_open("",""); | |
67 | iconv(cd,NULL,NULL,NULL,NULL); | |
68 | iconv_close(cd);]])], | |
69 | [am_cv_lib_iconv=yes] | |
70 | [am_cv_func_iconv=yes]) | |
f19dd04a DD |
71 | LIBS="$am_save_LIBS" |
72 | fi | |
73 | ]) | |
74 | if test "$am_cv_func_iconv" = yes; then | |
862776f2 AA |
75 | AC_CACHE_CHECK([for working iconv], [am_cv_func_iconv_works], [ |
76 | dnl This tests against bugs in AIX 5.1, AIX 6.1..7.1, HP-UX 11.11, | |
77 | dnl Solaris 10. | |
78 | am_save_LIBS="$LIBS" | |
79 | if test $am_cv_lib_iconv = yes; then | |
80 | LIBS="$LIBS $LIBICONV" | |
81 | fi | |
82 | am_cv_func_iconv_works=no | |
83 | for ac_iconv_const in '' 'const'; do | |
84 | AC_RUN_IFELSE( | |
85 | [AC_LANG_PROGRAM( | |
86 | [[ | |
87 | #include <iconv.h> | |
88 | #include <string.h> | |
89 | ||
90 | #ifndef ICONV_CONST | |
91 | # define ICONV_CONST $ac_iconv_const | |
92 | #endif | |
93 | ]], | |
94 | [[int result = 0; | |
95 | /* Test against AIX 5.1...7.2 bug: Failures are not distinguishable from | |
96 | successful returns. This is even documented in | |
97 | <https://www.ibm.com/support/knowledgecenter/ssw_aix_72/i_bostechref/iconv.html> */ | |
98 | { | |
99 | iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8"); | |
100 | if (cd_utf8_to_88591 != (iconv_t)(-1)) | |
101 | { | |
102 | static ICONV_CONST char input[] = "\342\202\254"; /* EURO SIGN */ | |
103 | char buf[10]; | |
104 | ICONV_CONST char *inptr = input; | |
105 | size_t inbytesleft = strlen (input); | |
106 | char *outptr = buf; | |
107 | size_t outbytesleft = sizeof (buf); | |
108 | size_t res = iconv (cd_utf8_to_88591, | |
109 | &inptr, &inbytesleft, | |
110 | &outptr, &outbytesleft); | |
111 | if (res == 0) | |
112 | result |= 1; | |
113 | iconv_close (cd_utf8_to_88591); | |
114 | } | |
115 | } | |
116 | /* Test against Solaris 10 bug: Failures are not distinguishable from | |
117 | successful returns. */ | |
118 | { | |
119 | iconv_t cd_ascii_to_88591 = iconv_open ("ISO8859-1", "646"); | |
120 | if (cd_ascii_to_88591 != (iconv_t)(-1)) | |
121 | { | |
122 | static ICONV_CONST char input[] = "\263"; | |
123 | char buf[10]; | |
124 | ICONV_CONST char *inptr = input; | |
125 | size_t inbytesleft = strlen (input); | |
126 | char *outptr = buf; | |
127 | size_t outbytesleft = sizeof (buf); | |
128 | size_t res = iconv (cd_ascii_to_88591, | |
129 | &inptr, &inbytesleft, | |
130 | &outptr, &outbytesleft); | |
131 | if (res == 0) | |
132 | result |= 2; | |
133 | iconv_close (cd_ascii_to_88591); | |
134 | } | |
135 | } | |
136 | /* Test against AIX 6.1..7.1 bug: Buffer overrun. */ | |
137 | { | |
138 | iconv_t cd_88591_to_utf8 = iconv_open ("UTF-8", "ISO-8859-1"); | |
139 | if (cd_88591_to_utf8 != (iconv_t)(-1)) | |
140 | { | |
141 | static ICONV_CONST char input[] = "\304"; | |
142 | static char buf[2] = { (char)0xDE, (char)0xAD }; | |
143 | ICONV_CONST char *inptr = input; | |
144 | size_t inbytesleft = 1; | |
145 | char *outptr = buf; | |
146 | size_t outbytesleft = 1; | |
147 | size_t res = iconv (cd_88591_to_utf8, | |
148 | &inptr, &inbytesleft, | |
149 | &outptr, &outbytesleft); | |
150 | if (res != (size_t)(-1) || outptr - buf > 1 || buf[1] != (char)0xAD) | |
151 | result |= 4; | |
152 | iconv_close (cd_88591_to_utf8); | |
153 | } | |
154 | } | |
155 | #if 0 /* This bug could be worked around by the caller. */ | |
156 | /* Test against HP-UX 11.11 bug: Positive return value instead of 0. */ | |
157 | { | |
158 | iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591"); | |
159 | if (cd_88591_to_utf8 != (iconv_t)(-1)) | |
160 | { | |
161 | static ICONV_CONST char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337"; | |
162 | char buf[50]; | |
163 | ICONV_CONST char *inptr = input; | |
164 | size_t inbytesleft = strlen (input); | |
165 | char *outptr = buf; | |
166 | size_t outbytesleft = sizeof (buf); | |
167 | size_t res = iconv (cd_88591_to_utf8, | |
168 | &inptr, &inbytesleft, | |
169 | &outptr, &outbytesleft); | |
170 | if ((int)res > 0) | |
171 | result |= 8; | |
172 | iconv_close (cd_88591_to_utf8); | |
173 | } | |
174 | } | |
175 | #endif | |
176 | /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is | |
177 | provided. */ | |
178 | { | |
179 | /* Try standardized names. */ | |
180 | iconv_t cd1 = iconv_open ("UTF-8", "EUC-JP"); | |
181 | /* Try IRIX, OSF/1 names. */ | |
182 | iconv_t cd2 = iconv_open ("UTF-8", "eucJP"); | |
183 | /* Try AIX names. */ | |
184 | iconv_t cd3 = iconv_open ("UTF-8", "IBM-eucJP"); | |
185 | /* Try HP-UX names. */ | |
186 | iconv_t cd4 = iconv_open ("utf8", "eucJP"); | |
187 | if (cd1 == (iconv_t)(-1) && cd2 == (iconv_t)(-1) | |
188 | && cd3 == (iconv_t)(-1) && cd4 == (iconv_t)(-1)) | |
189 | result |= 16; | |
190 | if (cd1 != (iconv_t)(-1)) | |
191 | iconv_close (cd1); | |
192 | if (cd2 != (iconv_t)(-1)) | |
193 | iconv_close (cd2); | |
194 | if (cd3 != (iconv_t)(-1)) | |
195 | iconv_close (cd3); | |
196 | if (cd4 != (iconv_t)(-1)) | |
197 | iconv_close (cd4); | |
198 | } | |
199 | return result; | |
200 | ]])], | |
201 | [am_cv_func_iconv_works=yes], , | |
202 | [case "$host_os" in | |
203 | aix* | hpux*) am_cv_func_iconv_works="guessing no" ;; | |
204 | *) am_cv_func_iconv_works="guessing yes" ;; | |
205 | esac]) | |
206 | test "$am_cv_func_iconv_works" = no || break | |
207 | done | |
208 | LIBS="$am_save_LIBS" | |
209 | ]) | |
210 | case "$am_cv_func_iconv_works" in | |
211 | *no) am_func_iconv=no am_cv_lib_iconv=no ;; | |
212 | *) am_func_iconv=yes ;; | |
213 | esac | |
214 | else | |
215 | am_func_iconv=no am_cv_lib_iconv=no | |
216 | fi | |
217 | if test "$am_func_iconv" = yes; then | |
218 | AC_DEFINE([HAVE_ICONV], [1], | |
219 | [Define if you have the iconv() function and it works.]) | |
f19dd04a DD |
220 | fi |
221 | if test "$am_cv_lib_iconv" = yes; then | |
222 | AC_MSG_CHECKING([how to link with libiconv]) | |
223 | AC_MSG_RESULT([$LIBICONV]) | |
224 | else | |
862776f2 AA |
225 | dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV |
226 | dnl either. | |
227 | CPPFLAGS="$am_save_CPPFLAGS" | |
f19dd04a DD |
228 | LIBICONV= |
229 | LTLIBICONV= | |
230 | fi | |
862776f2 AA |
231 | AC_SUBST([LIBICONV]) |
232 | AC_SUBST([LTLIBICONV]) | |
f19dd04a DD |
233 | ]) |
234 | ||
862776f2 AA |
235 | dnl Define AM_ICONV using AC_DEFUN_ONCE, in order to avoid warnings like |
236 | dnl "warning: AC_REQUIRE: `AM_ICONV' was expanded before it was required". | |
237 | AC_DEFUN_ONCE([AM_ICONV], | |
f19dd04a DD |
238 | [ |
239 | AM_ICONV_LINK | |
240 | if test "$am_cv_func_iconv" = yes; then | |
862776f2 AA |
241 | AC_CACHE_CHECK([whether iconv is compatible with its POSIX signature], |
242 | [gl_cv_iconv_nonconst], | |
243 | [AC_COMPILE_IFELSE( | |
244 | [AC_LANG_PROGRAM( | |
245 | [[ | |
f19dd04a DD |
246 | #include <stdlib.h> |
247 | #include <iconv.h> | |
248 | extern | |
249 | #ifdef __cplusplus | |
250 | "C" | |
251 | #endif | |
f19dd04a | 252 | size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft); |
862776f2 AA |
253 | ]], |
254 | [[]])], | |
255 | [gl_cv_iconv_nonconst=yes], | |
256 | [gl_cv_iconv_nonconst=no]) | |
257 | ]) | |
258 | else | |
259 | dnl When compiling GNU libiconv on a system that does not have iconv yet, | |
260 | dnl pick the POSIX compliant declaration without 'const'. | |
261 | gl_cv_iconv_nonconst=yes | |
262 | fi | |
263 | if test $gl_cv_iconv_nonconst = yes; then | |
264 | iconv_arg1="" | |
265 | else | |
266 | iconv_arg1="const" | |
267 | fi | |
268 | AC_DEFINE_UNQUOTED([ICONV_CONST], [$iconv_arg1], | |
269 | [Define as const if the declaration of iconv() needs const.]) | |
270 | dnl Also substitute ICONV_CONST in the gnulib generated <iconv.h>. | |
271 | m4_ifdef([gl_ICONV_H_DEFAULTS], | |
272 | [AC_REQUIRE([gl_ICONV_H_DEFAULTS]) | |
273 | if test $gl_cv_iconv_nonconst != yes; then | |
274 | ICONV_CONST="const" | |
275 | fi | |
276 | ]) | |
277 | ||
278 | dnl A summary result, for those packages which want to print a summary at the | |
279 | dnl end of the configuration. | |
280 | if test "$am_func_iconv" = yes; then | |
281 | if test -n "$LIBICONV"; then | |
282 | am_cv_func_iconv_summary='yes, in libiconv' | |
283 | else | |
284 | am_cv_func_iconv_summary='yes, in libc' | |
285 | fi | |
286 | else | |
287 | if test "$am_cv_func_iconv" = yes; then | |
288 | am_cv_func_iconv_summary='not working, consider installing GNU libiconv' | |
289 | else | |
290 | am_cv_func_iconv_summary='no, consider installing GNU libiconv' | |
291 | fi | |
f19dd04a DD |
292 | fi |
293 | ]) |