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 $INCICONV to CPPFLAGS before performing the following checks,
31 dnl because if the user has installed libiconv and not disabled its use
32 dnl via --without-libiconv-prefix, he wants to use it. The first
33 dnl AC_TRY_LINK will then fail, the second AC_TRY_LINK will succeed.
34 am_save_CPPFLAGS="$CPPFLAGS"
35 AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])
37 AC_CACHE_CHECK([for iconv], [am_cv_func_iconv], [
38 am_cv_func_iconv="no, consider installing GNU libiconv"
40 AC_TRY_LINK([#include <stdlib.h>
42 [iconv_t cd = iconv_open("","");
43 iconv(cd,NULL,NULL,NULL,NULL);
45 [am_cv_func_iconv=yes])
46 if test "$am_cv_func_iconv" != yes; then
48 LIBS="$LIBS $LIBICONV"
49 AC_TRY_LINK([#include <stdlib.h>
51 [iconv_t cd = iconv_open("","");
52 iconv(cd,NULL,NULL,NULL,NULL);
55 [am_cv_func_iconv=yes])
59 if test "$am_cv_func_iconv" = yes; then
60 AC_CACHE_CHECK([for working iconv], [am_cv_func_iconv_works], [
61 dnl This tests against bugs in AIX 5.1, AIX 6.1..7.1, HP-UX 11.11,
64 if test $am_cv_lib_iconv = yes; then
65 LIBS="$LIBS $LIBICONV"
72 /* Test against AIX 5.1 bug: Failures are not distinguishable from successful
75 iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8");
76 if (cd_utf8_to_88591 != (iconv_t)(-1))
78 static const char input[] = "\342\202\254"; /* EURO SIGN */
80 const char *inptr = input;
81 size_t inbytesleft = strlen (input);
83 size_t outbytesleft = sizeof (buf);
84 size_t res = iconv (cd_utf8_to_88591,
85 (char **) &inptr, &inbytesleft,
86 &outptr, &outbytesleft);
91 /* Test against Solaris 10 bug: Failures are not distinguishable from
92 successful returns. */
94 iconv_t cd_ascii_to_88591 = iconv_open ("ISO8859-1", "646");
95 if (cd_ascii_to_88591 != (iconv_t)(-1))
97 static const char input[] = "\263";
99 const char *inptr = input;
100 size_t inbytesleft = strlen (input);
102 size_t outbytesleft = sizeof (buf);
103 size_t res = iconv (cd_ascii_to_88591,
104 (char **) &inptr, &inbytesleft,
105 &outptr, &outbytesleft);
110 /* Test against AIX 6.1..7.1 bug: Buffer overrun. */
112 iconv_t cd_88591_to_utf8 = iconv_open ("UTF-8", "ISO-8859-1");
113 if (cd_88591_to_utf8 != (iconv_t)(-1))
115 static const char input[] = "\304";
116 static char buf[2] = { (char)0xDE, (char)0xAD };
117 const char *inptr = input;
118 size_t inbytesleft = 1;
120 size_t outbytesleft = 1;
121 size_t res = iconv (cd_88591_to_utf8,
122 (char **) &inptr, &inbytesleft,
123 &outptr, &outbytesleft);
124 if (res != (size_t)(-1) || outptr - buf > 1 || buf[1] != (char)0xAD)
128 #if 0 /* This bug could be worked around by the caller. */
129 /* Test against HP-UX 11.11 bug: Positive return value instead of 0. */
131 iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591");
132 if (cd_88591_to_utf8 != (iconv_t)(-1))
134 static const char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
136 const char *inptr = input;
137 size_t inbytesleft = strlen (input);
139 size_t outbytesleft = sizeof (buf);
140 size_t res = iconv (cd_88591_to_utf8,
141 (char **) &inptr, &inbytesleft,
142 &outptr, &outbytesleft);
148 /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is
150 if (/* Try standardized names. */
151 iconv_open ("UTF-8", "EUC-JP") == (iconv_t)(-1)
152 /* Try IRIX, OSF/1 names. */
153 && iconv_open ("UTF-8", "eucJP") == (iconv_t)(-1)
155 && iconv_open ("UTF-8", "IBM-eucJP") == (iconv_t)(-1)
156 /* Try HP-UX names. */
157 && iconv_open ("utf8", "eucJP") == (iconv_t)(-1))
160 }], [am_cv_func_iconv_works=yes], [am_cv_func_iconv_works=no],
164 aix* | hpux*) am_cv_func_iconv_works="guessing no" ;;
165 *) am_cv_func_iconv_works="guessing yes" ;;
171 case "$am_cv_func_iconv_works" in
172 *no) am_func_iconv=no am_cv_lib_iconv=no ;;
173 *) am_func_iconv=yes ;;
176 am_func_iconv=no am_cv_lib_iconv=no
178 if test "$am_func_iconv" = yes; then
179 AC_DEFINE([HAVE_ICONV], [1],
180 [Define if you have the iconv() function and it works.])
182 if test "$am_cv_lib_iconv" = yes; then
183 AC_MSG_CHECKING([how to link with libiconv])
184 AC_MSG_RESULT([$LIBICONV])
186 dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
188 CPPFLAGS="$am_save_CPPFLAGS"
193 AC_SUBST([LTLIBICONV])
196 dnl Define AM_ICONV using AC_DEFUN_ONCE for Autoconf >= 2.64, in order to
197 dnl avoid warnings like
198 dnl "warning: AC_REQUIRE: `AM_ICONV' was expanded before it was required".
199 dnl This is tricky because of the way 'aclocal' is implemented:
200 dnl - It requires defining an auxiliary macro whose name ends in AC_DEFUN.
201 dnl Otherwise aclocal's initial scan pass would miss the macro definition.
202 dnl - It requires a line break inside the AC_DEFUN_ONCE and AC_DEFUN expansions.
203 dnl Otherwise aclocal would emit many "Use of uninitialized value $1"
205 m4_define([gl_iconv_AC_DEFUN],
206 m4_version_prereq([2.64],
211 gl_iconv_AC_DEFUN([AM_ICONV],
214 if test "$am_cv_func_iconv" = yes; then
215 AC_MSG_CHECKING([for iconv declaration])
216 AC_CACHE_VAL([am_cv_proto_iconv], [
224 #if defined(__STDC__) || defined(__cplusplus)
225 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
229 ], [], [am_cv_proto_iconv_arg1=""], [am_cv_proto_iconv_arg1="const"])
230 am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
231 am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
234 AC_DEFINE_UNQUOTED([ICONV_CONST], [$am_cv_proto_iconv_arg1],
235 [Define as const if the declaration of iconv() needs const.])