ticonv.m4 - vaccinewars - be a doctor and try to vaccinate the world
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ticonv.m4 (9731B)
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1 # iconv.m4 serial 21
2 dnl Copyright (C) 2000-2002, 2007-2014, 2016-2020 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.
7
8 dnl From Bruno Haible.
9
10 AC_DEFUN([AM_ICONV_LINKFLAGS_BODY],
11 [
12 dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
13 AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
14 AC_REQUIRE([AC_LIB_RPATH])
15
16 dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
17 dnl accordingly.
18 AC_LIB_LINKFLAGS_BODY([iconv])
19 ])
20
21 AC_DEFUN([AM_ICONV_LINK],
22 [
23 dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
24 dnl those with the standalone portable GNU libiconv installed).
25 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
26
27 dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
28 dnl accordingly.
29 AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
30
31 dnl Add $INCICONV to CPPFLAGS before performing the following checks,
32 dnl because if the user has installed libiconv and not disabled its use
33 dnl via --without-libiconv-prefix, he wants to use it. The first
34 dnl AC_LINK_IFELSE will then fail, the second AC_LINK_IFELSE will succeed.
35 am_save_CPPFLAGS="$CPPFLAGS"
36 AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])
37
38 AC_CACHE_CHECK([for iconv], [am_cv_func_iconv], [
39 am_cv_func_iconv="no, consider installing GNU libiconv"
40 am_cv_lib_iconv=no
41 AC_LINK_IFELSE(
42 [AC_LANG_PROGRAM(
43 [[
44 #include <stdlib.h>
45 #include <iconv.h>
46 ]],
47 [[iconv_t cd = iconv_open("","");
48 iconv(cd,NULL,NULL,NULL,NULL);
49 iconv_close(cd);]])],
50 [am_cv_func_iconv=yes])
51 if test "$am_cv_func_iconv" != yes; then
52 am_save_LIBS="$LIBS"
53 LIBS="$LIBS $LIBICONV"
54 AC_LINK_IFELSE(
55 [AC_LANG_PROGRAM(
56 [[
57 #include <stdlib.h>
58 #include <iconv.h>
59 ]],
60 [[iconv_t cd = iconv_open("","");
61 iconv(cd,NULL,NULL,NULL,NULL);
62 iconv_close(cd);]])],
63 [am_cv_lib_iconv=yes]
64 [am_cv_func_iconv=yes])
65 LIBS="$am_save_LIBS"
66 fi
67 ])
68 if test "$am_cv_func_iconv" = yes; then
69 AC_CACHE_CHECK([for working iconv], [am_cv_func_iconv_works], [
70 dnl This tests against bugs in AIX 5.1, AIX 6.1..7.1, HP-UX 11.11,
71 dnl Solaris 10.
72 am_save_LIBS="$LIBS"
73 if test $am_cv_lib_iconv = yes; then
74 LIBS="$LIBS $LIBICONV"
75 fi
76 am_cv_func_iconv_works=no
77 for ac_iconv_const in '' 'const'; do
78 AC_RUN_IFELSE(
79 [AC_LANG_PROGRAM(
80 [[
81 #include <iconv.h>
82 #include <string.h>
83
84 #ifndef ICONV_CONST
85 # define ICONV_CONST $ac_iconv_const
86 #endif
87 ]],
88 [[int result = 0;
89 /* Test against AIX 5.1 bug: Failures are not distinguishable from successful
90 returns. */
91 {
92 iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8");
93 if (cd_utf8_to_88591 != (iconv_t)(-1))
94 {
95 static ICONV_CONST char input[] = "\342\202\254"; /* EURO SIGN */
96 char buf[10];
97 ICONV_CONST char *inptr = input;
98 size_t inbytesleft = strlen (input);
99 char *outptr = buf;
100 size_t outbytesleft = sizeof (buf);
101 size_t res = iconv (cd_utf8_to_88591,
102 &inptr, &inbytesleft,
103 &outptr, &outbytesleft);
104 if (res == 0)
105 result |= 1;
106 iconv_close (cd_utf8_to_88591);
107 }
108 }
109 /* Test against Solaris 10 bug: Failures are not distinguishable from
110 successful returns. */
111 {
112 iconv_t cd_ascii_to_88591 = iconv_open ("ISO8859-1", "646");
113 if (cd_ascii_to_88591 != (iconv_t)(-1))
114 {
115 static ICONV_CONST char input[] = "\263";
116 char buf[10];
117 ICONV_CONST char *inptr = input;
118 size_t inbytesleft = strlen (input);
119 char *outptr = buf;
120 size_t outbytesleft = sizeof (buf);
121 size_t res = iconv (cd_ascii_to_88591,
122 &inptr, &inbytesleft,
123 &outptr, &outbytesleft);
124 if (res == 0)
125 result |= 2;
126 iconv_close (cd_ascii_to_88591);
127 }
128 }
129 /* Test against AIX 6.1..7.1 bug: Buffer overrun. */
130 {
131 iconv_t cd_88591_to_utf8 = iconv_open ("UTF-8", "ISO-8859-1");
132 if (cd_88591_to_utf8 != (iconv_t)(-1))
133 {
134 static ICONV_CONST char input[] = "\304";
135 static char buf[2] = { (char)0xDE, (char)0xAD };
136 ICONV_CONST char *inptr = input;
137 size_t inbytesleft = 1;
138 char *outptr = buf;
139 size_t outbytesleft = 1;
140 size_t res = iconv (cd_88591_to_utf8,
141 &inptr, &inbytesleft,
142 &outptr, &outbytesleft);
143 if (res != (size_t)(-1) || outptr - buf > 1 || buf[1] != (char)0xAD)
144 result |= 4;
145 iconv_close (cd_88591_to_utf8);
146 }
147 }
148 #if 0 /* This bug could be worked around by the caller. */
149 /* Test against HP-UX 11.11 bug: Positive return value instead of 0. */
150 {
151 iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591");
152 if (cd_88591_to_utf8 != (iconv_t)(-1))
153 {
154 static ICONV_CONST char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
155 char buf[50];
156 ICONV_CONST char *inptr = input;
157 size_t inbytesleft = strlen (input);
158 char *outptr = buf;
159 size_t outbytesleft = sizeof (buf);
160 size_t res = iconv (cd_88591_to_utf8,
161 &inptr, &inbytesleft,
162 &outptr, &outbytesleft);
163 if ((int)res > 0)
164 result |= 8;
165 iconv_close (cd_88591_to_utf8);
166 }
167 }
168 #endif
169 /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is
170 provided. */
171 {
172 /* Try standardized names. */
173 iconv_t cd1 = iconv_open ("UTF-8", "EUC-JP");
174 /* Try IRIX, OSF/1 names. */
175 iconv_t cd2 = iconv_open ("UTF-8", "eucJP");
176 /* Try AIX names. */
177 iconv_t cd3 = iconv_open ("UTF-8", "IBM-eucJP");
178 /* Try HP-UX names. */
179 iconv_t cd4 = iconv_open ("utf8", "eucJP");
180 if (cd1 == (iconv_t)(-1) && cd2 == (iconv_t)(-1)
181 && cd3 == (iconv_t)(-1) && cd4 == (iconv_t)(-1))
182 result |= 16;
183 if (cd1 != (iconv_t)(-1))
184 iconv_close (cd1);
185 if (cd2 != (iconv_t)(-1))
186 iconv_close (cd2);
187 if (cd3 != (iconv_t)(-1))
188 iconv_close (cd3);
189 if (cd4 != (iconv_t)(-1))
190 iconv_close (cd4);
191 }
192 return result;
193 ]])],
194 [am_cv_func_iconv_works=yes], ,
195 [case "$host_os" in
196 aix* | hpux*) am_cv_func_iconv_works="guessing no" ;;
197 *) am_cv_func_iconv_works="guessing yes" ;;
198 esac])
199 test "$am_cv_func_iconv_works" = no || break
200 done
201 LIBS="$am_save_LIBS"
202 ])
203 case "$am_cv_func_iconv_works" in
204 *no) am_func_iconv=no am_cv_lib_iconv=no ;;
205 *) am_func_iconv=yes ;;
206 esac
207 else
208 am_func_iconv=no am_cv_lib_iconv=no
209 fi
210 if test "$am_func_iconv" = yes; then
211 AC_DEFINE([HAVE_ICONV], [1],
212 [Define if you have the iconv() function and it works.])
213 fi
214 if test "$am_cv_lib_iconv" = yes; then
215 AC_MSG_CHECKING([how to link with libiconv])
216 AC_MSG_RESULT([$LIBICONV])
217 else
218 dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
219 dnl either.
220 CPPFLAGS="$am_save_CPPFLAGS"
221 LIBICONV=
222 LTLIBICONV=
223 fi
224 AC_SUBST([LIBICONV])
225 AC_SUBST([LTLIBICONV])
226 ])
227
228 dnl Define AM_ICONV using AC_DEFUN_ONCE for Autoconf >= 2.64, in order to
229 dnl avoid warnings like
230 dnl "warning: AC_REQUIRE: `AM_ICONV' was expanded before it was required".
231 dnl This is tricky because of the way 'aclocal' is implemented:
232 dnl - It requires defining an auxiliary macro whose name ends in AC_DEFUN.
233 dnl Otherwise aclocal's initial scan pass would miss the macro definition.
234 dnl - It requires a line break inside the AC_DEFUN_ONCE and AC_DEFUN expansions.
235 dnl Otherwise aclocal would emit many "Use of uninitialized value $1"
236 dnl warnings.
237 m4_define([gl_iconv_AC_DEFUN],
238 m4_version_prereq([2.64],
239 [[AC_DEFUN_ONCE(
240 [$1], [$2])]],
241 [m4_ifdef([gl_00GNULIB],
242 [[AC_DEFUN_ONCE(
243 [$1], [$2])]],
244 [[AC_DEFUN(
245 [$1], [$2])]])]))
246 gl_iconv_AC_DEFUN([AM_ICONV],
247 [
248 AM_ICONV_LINK
249 if test "$am_cv_func_iconv" = yes; then
250 AC_MSG_CHECKING([for iconv declaration])
251 AC_CACHE_VAL([am_cv_proto_iconv], [
252 AC_COMPILE_IFELSE(
253 [AC_LANG_PROGRAM(
254 [[
255 #include <stdlib.h>
256 #include <iconv.h>
257 extern
258 #ifdef __cplusplus
259 "C"
260 #endif
261 #if defined(__STDC__) || defined(_MSC_VER) || defined(__cplusplus)
262 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
263 #else
264 size_t iconv();
265 #endif
266 ]],
267 [[]])],
268 [am_cv_proto_iconv_arg1=""],
269 [am_cv_proto_iconv_arg1="const"])
270 am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
271 am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
272 AC_MSG_RESULT([
273 $am_cv_proto_iconv])
274 else
275 dnl When compiling GNU libiconv on a system that does not have iconv yet,
276 dnl pick the POSIX compliant declaration without 'const'.
277 am_cv_proto_iconv_arg1=""
278 fi
279 AC_DEFINE_UNQUOTED([ICONV_CONST], [$am_cv_proto_iconv_arg1],
280 [Define as const if the declaration of iconv() needs const.])
281 dnl Also substitute ICONV_CONST in the gnulib generated <iconv.h>.
282 m4_ifdef([gl_ICONV_H_DEFAULTS],
283 [AC_REQUIRE([gl_ICONV_H_DEFAULTS])
284 if test -n "$am_cv_proto_iconv_arg1"; then
285 ICONV_CONST="const"
286 fi
287 ])
288 ])