libguile/Makefile.am (snarfcppopts): Remove CFLAGS
[bpt/guile.git] / m4 / iconv.m4
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35428fb6 1# iconv.m4 serial 18 (gettext-0.18.2)
5e69ceb7 2dnl Copyright (C) 2000-2002, 2007-2014 Free Software Foundation, Inc.
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3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7dnl From Bruno Haible.
8
9AC_DEFUN([AM_ICONV_LINKFLAGS_BODY],
10[
11 dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
12 AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
13 AC_REQUIRE([AC_LIB_RPATH])
14
15 dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
16 dnl accordingly.
17 AC_LIB_LINKFLAGS_BODY([iconv])
18])
19
20AC_DEFUN([AM_ICONV_LINK],
21[
22 dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
23 dnl those with the standalone portable GNU libiconv installed).
24 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
25
26 dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
27 dnl accordingly.
28 AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
29
30 dnl Add $INCICONV to CPPFLAGS before performing the following checks,
31 dnl because if the user has installed libiconv and not disabled its use
32 dnl via --without-libiconv-prefix, he wants to use it. The first
9157d901 33 dnl AC_LINK_IFELSE will then fail, the second AC_LINK_IFELSE will succeed.
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34 am_save_CPPFLAGS="$CPPFLAGS"
35 AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])
36
37 AC_CACHE_CHECK([for iconv], [am_cv_func_iconv], [
38 am_cv_func_iconv="no, consider installing GNU libiconv"
39 am_cv_lib_iconv=no
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40 AC_LINK_IFELSE(
41 [AC_LANG_PROGRAM(
42 [[
43#include <stdlib.h>
44#include <iconv.h>
45 ]],
46 [[iconv_t cd = iconv_open("","");
47 iconv(cd,NULL,NULL,NULL,NULL);
48 iconv_close(cd);]])],
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49 [am_cv_func_iconv=yes])
50 if test "$am_cv_func_iconv" != yes; then
51 am_save_LIBS="$LIBS"
52 LIBS="$LIBS $LIBICONV"
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53 AC_LINK_IFELSE(
54 [AC_LANG_PROGRAM(
55 [[
56#include <stdlib.h>
57#include <iconv.h>
58 ]],
59 [[iconv_t cd = iconv_open("","");
60 iconv(cd,NULL,NULL,NULL,NULL);
61 iconv_close(cd);]])],
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62 [am_cv_lib_iconv=yes]
63 [am_cv_func_iconv=yes])
64 LIBS="$am_save_LIBS"
65 fi
66 ])
67 if test "$am_cv_func_iconv" = yes; then
68 AC_CACHE_CHECK([for working iconv], [am_cv_func_iconv_works], [
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69 dnl This tests against bugs in AIX 5.1, AIX 6.1..7.1, HP-UX 11.11,
70 dnl Solaris 10.
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71 am_save_LIBS="$LIBS"
72 if test $am_cv_lib_iconv = yes; then
73 LIBS="$LIBS $LIBICONV"
74 fi
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75 AC_RUN_IFELSE(
76 [AC_LANG_SOURCE([[
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77#include <iconv.h>
78#include <string.h>
79int main ()
80{
0f00f2c3 81 int result = 0;
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82 /* Test against AIX 5.1 bug: Failures are not distinguishable from successful
83 returns. */
84 {
85 iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8");
86 if (cd_utf8_to_88591 != (iconv_t)(-1))
87 {
88 static const char input[] = "\342\202\254"; /* EURO SIGN */
89 char buf[10];
90 const char *inptr = input;
91 size_t inbytesleft = strlen (input);
92 char *outptr = buf;
93 size_t outbytesleft = sizeof (buf);
94 size_t res = iconv (cd_utf8_to_88591,
95 (char **) &inptr, &inbytesleft,
96 &outptr, &outbytesleft);
97 if (res == 0)
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98 result |= 1;
99 iconv_close (cd_utf8_to_88591);
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100 }
101 }
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102 /* Test against Solaris 10 bug: Failures are not distinguishable from
103 successful returns. */
104 {
105 iconv_t cd_ascii_to_88591 = iconv_open ("ISO8859-1", "646");
106 if (cd_ascii_to_88591 != (iconv_t)(-1))
107 {
108 static const char input[] = "\263";
109 char buf[10];
110 const char *inptr = input;
111 size_t inbytesleft = strlen (input);
112 char *outptr = buf;
113 size_t outbytesleft = sizeof (buf);
114 size_t res = iconv (cd_ascii_to_88591,
115 (char **) &inptr, &inbytesleft,
116 &outptr, &outbytesleft);
117 if (res == 0)
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118 result |= 2;
119 iconv_close (cd_ascii_to_88591);
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120 }
121 }
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122 /* Test against AIX 6.1..7.1 bug: Buffer overrun. */
123 {
124 iconv_t cd_88591_to_utf8 = iconv_open ("UTF-8", "ISO-8859-1");
125 if (cd_88591_to_utf8 != (iconv_t)(-1))
126 {
127 static const char input[] = "\304";
128 static char buf[2] = { (char)0xDE, (char)0xAD };
129 const char *inptr = input;
130 size_t inbytesleft = 1;
131 char *outptr = buf;
132 size_t outbytesleft = 1;
133 size_t res = iconv (cd_88591_to_utf8,
134 (char **) &inptr, &inbytesleft,
135 &outptr, &outbytesleft);
136 if (res != (size_t)(-1) || outptr - buf > 1 || buf[1] != (char)0xAD)
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137 result |= 4;
138 iconv_close (cd_88591_to_utf8);
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139 }
140 }
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141#if 0 /* This bug could be worked around by the caller. */
142 /* Test against HP-UX 11.11 bug: Positive return value instead of 0. */
143 {
144 iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591");
145 if (cd_88591_to_utf8 != (iconv_t)(-1))
146 {
147 static const char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
148 char buf[50];
149 const char *inptr = input;
150 size_t inbytesleft = strlen (input);
151 char *outptr = buf;
152 size_t outbytesleft = sizeof (buf);
153 size_t res = iconv (cd_88591_to_utf8,
154 (char **) &inptr, &inbytesleft,
155 &outptr, &outbytesleft);
156 if ((int)res > 0)
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157 result |= 8;
158 iconv_close (cd_88591_to_utf8);
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159 }
160 }
161#endif
162 /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is
163 provided. */
164 if (/* Try standardized names. */
165 iconv_open ("UTF-8", "EUC-JP") == (iconv_t)(-1)
166 /* Try IRIX, OSF/1 names. */
167 && iconv_open ("UTF-8", "eucJP") == (iconv_t)(-1)
168 /* Try AIX names. */
169 && iconv_open ("UTF-8", "IBM-eucJP") == (iconv_t)(-1)
170 /* Try HP-UX names. */
171 && iconv_open ("utf8", "eucJP") == (iconv_t)(-1))
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172 result |= 16;
173 return result;
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174}]])],
175 [am_cv_func_iconv_works=yes],
176 [am_cv_func_iconv_works=no],
177 [
178changequote(,)dnl
179 case "$host_os" in
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180 aix* | hpux*) am_cv_func_iconv_works="guessing no" ;;
181 *) am_cv_func_iconv_works="guessing yes" ;;
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182 esac
183changequote([,])dnl
184 ])
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185 LIBS="$am_save_LIBS"
186 ])
187 case "$am_cv_func_iconv_works" in
188 *no) am_func_iconv=no am_cv_lib_iconv=no ;;
189 *) am_func_iconv=yes ;;
190 esac
191 else
192 am_func_iconv=no am_cv_lib_iconv=no
193 fi
194 if test "$am_func_iconv" = yes; then
195 AC_DEFINE([HAVE_ICONV], [1],
196 [Define if you have the iconv() function and it works.])
197 fi
198 if test "$am_cv_lib_iconv" = yes; then
199 AC_MSG_CHECKING([how to link with libiconv])
200 AC_MSG_RESULT([$LIBICONV])
201 else
202 dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
203 dnl either.
204 CPPFLAGS="$am_save_CPPFLAGS"
205 LIBICONV=
206 LTLIBICONV=
207 fi
208 AC_SUBST([LIBICONV])
209 AC_SUBST([LTLIBICONV])
210])
211
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212dnl Define AM_ICONV using AC_DEFUN_ONCE for Autoconf >= 2.64, in order to
213dnl avoid warnings like
214dnl "warning: AC_REQUIRE: `AM_ICONV' was expanded before it was required".
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215dnl This is tricky because of the way 'aclocal' is implemented:
216dnl - It requires defining an auxiliary macro whose name ends in AC_DEFUN.
217dnl Otherwise aclocal's initial scan pass would miss the macro definition.
218dnl - It requires a line break inside the AC_DEFUN_ONCE and AC_DEFUN expansions.
219dnl Otherwise aclocal would emit many "Use of uninitialized value $1"
220dnl warnings.
221m4_define([gl_iconv_AC_DEFUN],
222 m4_version_prereq([2.64],
223 [[AC_DEFUN_ONCE(
224 [$1], [$2])]],
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225 [m4_ifdef([gl_00GNULIB],
226 [[AC_DEFUN_ONCE(
227 [$1], [$2])]],
228 [[AC_DEFUN(
229 [$1], [$2])]])]))
6f32e5c7 230gl_iconv_AC_DEFUN([AM_ICONV],
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231[
232 AM_ICONV_LINK
233 if test "$am_cv_func_iconv" = yes; then
234 AC_MSG_CHECKING([for iconv declaration])
235 AC_CACHE_VAL([am_cv_proto_iconv], [
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236 AC_COMPILE_IFELSE(
237 [AC_LANG_PROGRAM(
238 [[
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239#include <stdlib.h>
240#include <iconv.h>
241extern
242#ifdef __cplusplus
243"C"
244#endif
35428fb6 245#if defined(__STDC__) || defined(_MSC_VER) || defined(__cplusplus)
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246size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
247#else
248size_t iconv();
249#endif
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250 ]],
251 [[]])],
252 [am_cv_proto_iconv_arg1=""],
253 [am_cv_proto_iconv_arg1="const"])
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254 am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
255 am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
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256 AC_MSG_RESULT([
257 $am_cv_proto_iconv])
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258 AC_DEFINE_UNQUOTED([ICONV_CONST], [$am_cv_proto_iconv_arg1],
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>.
261 m4_ifdef([gl_ICONV_H_DEFAULTS],
262 [AC_REQUIRE([gl_ICONV_H_DEFAULTS])
263 if test -n "$am_cv_proto_iconv_arg1"; then
264 ICONV_CONST="const"
265 fi
266 ])
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267 fi
268])