2 dnl Copyright (C) 2000-2002, 2007-2010 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"
80 /* Test against AIX 5.1 bug: Failures are not distinguishable from successful
83 iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8");
84 if (cd_utf8_to_88591 != (iconv_t)(-1))
86 static const char input[] = "\342\202\254"; /* EURO SIGN */
88 const char *inptr = input;
89 size_t inbytesleft = strlen (input);
91 size_t outbytesleft = sizeof (buf);
92 size_t res = iconv (cd_utf8_to_88591,
93 (char **) &inptr, &inbytesleft,
94 &outptr, &outbytesleft);
99 /* Test against Solaris 10 bug: Failures are not distinguishable from
100 successful returns. */
102 iconv_t cd_ascii_to_88591 = iconv_open ("ISO8859-1", "646");
103 if (cd_ascii_to_88591 != (iconv_t)(-1))
105 static const char input[] = "\263";
107 const char *inptr = input;
108 size_t inbytesleft = strlen (input);
110 size_t outbytesleft = sizeof (buf);
111 size_t res = iconv (cd_ascii_to_88591,
112 (char **) &inptr, &inbytesleft,
113 &outptr, &outbytesleft);
118 /* Test against AIX 6.1..7.1 bug: Buffer overrun. */
120 iconv_t cd_88591_to_utf8 = iconv_open ("UTF-8", "ISO-8859-1");
121 if (cd_88591_to_utf8 != (iconv_t)(-1))
123 static const char input[] = "\304";
124 static char buf[2] = { (char)0xDE, (char)0xAD };
125 const char *inptr = input;
126 size_t inbytesleft = 1;
128 size_t outbytesleft = 1;
129 size_t res = iconv (cd_88591_to_utf8,
130 (char **) &inptr, &inbytesleft,
131 &outptr, &outbytesleft);
132 if (res != (size_t)(-1) || outptr - buf > 1 || buf[1] != (char)0xAD)
136 #if 0 /* This bug could be worked around by the caller. */
137 /* Test against HP-UX 11.11 bug: Positive return value instead of 0. */
139 iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591");
140 if (cd_88591_to_utf8 != (iconv_t)(-1))
142 static const char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
144 const char *inptr = input;
145 size_t inbytesleft = strlen (input);
147 size_t outbytesleft = sizeof (buf);
148 size_t res = iconv (cd_88591_to_utf8,
149 (char **) &inptr, &inbytesleft,
150 &outptr, &outbytesleft);
156 /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is
158 if (/* Try standardized names. */
159 iconv_open ("UTF-8", "EUC-JP") == (iconv_t)(-1)
160 /* Try IRIX, OSF/1 names. */
161 && iconv_open ("UTF-8", "eucJP") == (iconv_t)(-1)
163 && iconv_open ("UTF-8", "IBM-eucJP") == (iconv_t)(-1)
164 /* Try HP-UX names. */
165 && iconv_open ("utf8", "eucJP") == (iconv_t)(-1))
168 }], [am_cv_func_iconv_works=yes], [am_cv_func_iconv_works=no],
172 aix* | hpux*) am_cv_func_iconv_works="guessing no" ;;
173 *) am_cv_func_iconv_works="guessing yes" ;;
179 case "$am_cv_func_iconv_works" in
180 *no) am_func_iconv=no am_cv_lib_iconv=no ;;
181 *) am_func_iconv=yes ;;
184 am_func_iconv=no am_cv_lib_iconv=no
186 if test "$am_func_iconv" = yes; then
187 AC_DEFINE([HAVE_ICONV], [1],
188 [Define if you have the iconv() function and it works.])
190 if test "$am_cv_lib_iconv" = yes; then
191 AC_MSG_CHECKING([how to link with libiconv])
192 AC_MSG_RESULT([$LIBICONV])
194 dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
196 CPPFLAGS="$am_save_CPPFLAGS"
201 AC_SUBST([LTLIBICONV])
204 dnl Define AM_ICONV using AC_DEFUN_ONCE for Autoconf >= 2.64, in order to
205 dnl avoid warnings like
206 dnl "warning: AC_REQUIRE: `AM_ICONV' was expanded before it was required".
207 dnl This is tricky because of the way 'aclocal' is implemented:
208 dnl - It requires defining an auxiliary macro whose name ends in AC_DEFUN.
209 dnl Otherwise aclocal's initial scan pass would miss the macro definition.
210 dnl - It requires a line break inside the AC_DEFUN_ONCE and AC_DEFUN expansions.
211 dnl Otherwise aclocal would emit many "Use of uninitialized value $1"
213 m4_define([gl_iconv_AC_DEFUN],
214 m4_version_prereq([2.64],
219 gl_iconv_AC_DEFUN([AM_ICONV],
222 if test "$am_cv_func_iconv" = yes; then
223 AC_MSG_CHECKING([for iconv declaration])
224 AC_CACHE_VAL([am_cv_proto_iconv], [
234 #if defined(__STDC__) || defined(__cplusplus)
235 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
241 [am_cv_proto_iconv_arg1=""],
242 [am_cv_proto_iconv_arg1="const"])
243 am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
244 am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
247 AC_DEFINE_UNQUOTED([ICONV_CONST], [$am_cv_proto_iconv_arg1],
248 [Define as const if the declaration of iconv() needs const.])