2 dnl Copyright (C) 2000-2002, 2007-2014, 2016-2017 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
9 AC_DEFUN([AM_ICONV_LINKFLAGS_BODY],
11 dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
12 AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
13 AC_REQUIRE([AC_LIB_RPATH])
15 dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
17 AC_LIB_LINKFLAGS_BODY([iconv])
20 AC_DEFUN([AM_ICONV_LINK],
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
26 dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
28 AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
30 dnl Add $INCICONV to CPPFLAGS before performing the following checks,
31 dnl because if the user has installed libiconv and not disabled its use
32 dnl via --without-libiconv-prefix, he wants to use it. The first
33 dnl AC_LINK_IFELSE will then fail, the second AC_LINK_IFELSE will succeed.
34 am_save_CPPFLAGS="$CPPFLAGS"
35 AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])
37 AC_CACHE_CHECK([for iconv], [am_cv_func_iconv], [
38 am_cv_func_iconv="no, consider installing GNU libiconv"
46 [[iconv_t cd = iconv_open("","");
47 iconv(cd,NULL,NULL,NULL,NULL);
49 [am_cv_func_iconv=yes])
50 if test "$am_cv_func_iconv" != yes; then
52 LIBS="$LIBS $LIBICONV"
59 [[iconv_t cd = iconv_open("","");
60 iconv(cd,NULL,NULL,NULL,NULL);
63 [am_cv_func_iconv=yes])
67 if test "$am_cv_func_iconv" = yes; then
68 AC_CACHE_CHECK([for working iconv], [am_cv_func_iconv_works], [
69 dnl This tests against bugs in AIX 5.1, AIX 6.1..7.1, HP-UX 11.11,
72 if test $am_cv_lib_iconv = yes; then
73 LIBS="$LIBS $LIBICONV"
75 am_cv_func_iconv_works=no
76 for ac_iconv_const in '' 'const'; do
84 # define ICONV_CONST $ac_iconv_const
88 /* Test against AIX 5.1 bug: Failures are not distinguishable from successful
91 iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8");
92 if (cd_utf8_to_88591 != (iconv_t)(-1))
94 static ICONV_CONST char input[] = "\342\202\254"; /* EURO SIGN */
96 ICONV_CONST char *inptr = input;
97 size_t inbytesleft = strlen (input);
99 size_t outbytesleft = sizeof (buf);
100 size_t res = iconv (cd_utf8_to_88591,
101 &inptr, &inbytesleft,
102 &outptr, &outbytesleft);
105 iconv_close (cd_utf8_to_88591);
108 /* Test against Solaris 10 bug: Failures are not distinguishable from
109 successful returns. */
111 iconv_t cd_ascii_to_88591 = iconv_open ("ISO8859-1", "646");
112 if (cd_ascii_to_88591 != (iconv_t)(-1))
114 static ICONV_CONST char input[] = "\263";
116 ICONV_CONST char *inptr = input;
117 size_t inbytesleft = strlen (input);
119 size_t outbytesleft = sizeof (buf);
120 size_t res = iconv (cd_ascii_to_88591,
121 &inptr, &inbytesleft,
122 &outptr, &outbytesleft);
125 iconv_close (cd_ascii_to_88591);
128 /* Test against AIX 6.1..7.1 bug: Buffer overrun. */
130 iconv_t cd_88591_to_utf8 = iconv_open ("UTF-8", "ISO-8859-1");
131 if (cd_88591_to_utf8 != (iconv_t)(-1))
133 static ICONV_CONST char input[] = "\304";
134 static char buf[2] = { (char)0xDE, (char)0xAD };
135 ICONV_CONST char *inptr = input;
136 size_t inbytesleft = 1;
138 size_t outbytesleft = 1;
139 size_t res = iconv (cd_88591_to_utf8,
140 &inptr, &inbytesleft,
141 &outptr, &outbytesleft);
142 if (res != (size_t)(-1) || outptr - buf > 1 || buf[1] != (char)0xAD)
144 iconv_close (cd_88591_to_utf8);
147 #if 0 /* This bug could be worked around by the caller. */
148 /* Test against HP-UX 11.11 bug: Positive return value instead of 0. */
150 iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591");
151 if (cd_88591_to_utf8 != (iconv_t)(-1))
153 static ICONV_CONST char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
155 ICONV_CONST char *inptr = input;
156 size_t inbytesleft = strlen (input);
158 size_t outbytesleft = sizeof (buf);
159 size_t res = iconv (cd_88591_to_utf8,
160 &inptr, &inbytesleft,
161 &outptr, &outbytesleft);
164 iconv_close (cd_88591_to_utf8);
168 /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is
171 /* Try standardized names. */
172 iconv_t cd1 = iconv_open ("UTF-8", "EUC-JP");
173 /* Try IRIX, OSF/1 names. */
174 iconv_t cd2 = iconv_open ("UTF-8", "eucJP");
176 iconv_t cd3 = iconv_open ("UTF-8", "IBM-eucJP");
177 /* Try HP-UX names. */
178 iconv_t cd4 = iconv_open ("utf8", "eucJP");
179 if (cd1 == (iconv_t)(-1) && cd2 == (iconv_t)(-1)
180 && cd3 == (iconv_t)(-1) && cd4 == (iconv_t)(-1))
182 if (cd1 != (iconv_t)(-1))
184 if (cd2 != (iconv_t)(-1))
186 if (cd3 != (iconv_t)(-1))
188 if (cd4 != (iconv_t)(-1))
193 [am_cv_func_iconv_works=yes], ,
195 aix* | hpux*) am_cv_func_iconv_works="guessing no" ;;
196 *) am_cv_func_iconv_works="guessing yes" ;;
198 test "$am_cv_func_iconv_works" = no || break
202 case "$am_cv_func_iconv_works" in
203 *no) am_func_iconv=no am_cv_lib_iconv=no ;;
204 *) am_func_iconv=yes ;;
207 am_func_iconv=no am_cv_lib_iconv=no
209 if test "$am_func_iconv" = yes; then
210 AC_DEFINE([HAVE_ICONV], [1],
211 [Define if you have the iconv() function and it works.])
213 if test "$am_cv_lib_iconv" = yes; then
214 AC_MSG_CHECKING([how to link with libiconv])
215 AC_MSG_RESULT([$LIBICONV])
217 dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
219 CPPFLAGS="$am_save_CPPFLAGS"
224 AC_SUBST([LTLIBICONV])
227 dnl Define AM_ICONV using AC_DEFUN_ONCE for Autoconf >= 2.64, in order to
228 dnl avoid warnings like
229 dnl "warning: AC_REQUIRE: `AM_ICONV' was expanded before it was required".
230 dnl This is tricky because of the way 'aclocal' is implemented:
231 dnl - It requires defining an auxiliary macro whose name ends in AC_DEFUN.
232 dnl Otherwise aclocal's initial scan pass would miss the macro definition.
233 dnl - It requires a line break inside the AC_DEFUN_ONCE and AC_DEFUN expansions.
234 dnl Otherwise aclocal would emit many "Use of uninitialized value $1"
236 m4_define([gl_iconv_AC_DEFUN],
237 m4_version_prereq([2.64],
240 [m4_ifdef([gl_00GNULIB],
245 gl_iconv_AC_DEFUN([AM_ICONV],
248 if test "$am_cv_func_iconv" = yes; then
249 AC_MSG_CHECKING([for iconv declaration])
250 AC_CACHE_VAL([am_cv_proto_iconv], [
260 #if defined(__STDC__) || defined(_MSC_VER) || defined(__cplusplus)
261 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
267 [am_cv_proto_iconv_arg1=""],
268 [am_cv_proto_iconv_arg1="const"])
269 am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
270 am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
274 dnl When compiling GNU libiconv on a system that does not have iconv yet,
275 dnl pick the POSIX compliant declaration without 'const'.
276 am_cv_proto_iconv_arg1=""
278 AC_DEFINE_UNQUOTED([ICONV_CONST], [$am_cv_proto_iconv_arg1],
279 [Define as const if the declaration of iconv() needs const.])
280 dnl Also substitute ICONV_CONST in the gnulib generated <iconv.h>.
281 m4_ifdef([gl_ICONV_H_DEFAULTS],
282 [AC_REQUIRE([gl_ICONV_H_DEFAULTS])
283 if test -n "$am_cv_proto_iconv_arg1"; then