1: # iconv.m4 serial 21
2: dnl Copyright (C) 2000-2002, 2007-2014, 2016-2019 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: ])
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