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1 # iconv.m4 serial 11 (gettext-0.18.1)
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.
6
7 dnl From Bruno Haible.
8
9 AC_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
20 AC_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 $INCICONV to CPPFLAGS before performing the following checks,
31 dnl because if the user has installed libiconv and not disabled its use
32 dnl via --without-libiconv-prefix, he wants to use it. The first
33 dnl AC_TRY_LINK will then fail, the second AC_TRY_LINK will succeed.
34 am_save_CPPFLAGS="$CPPFLAGS"
35 AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])
36
37 AC_CACHE_CHECK([for iconv], [am_cv_func_iconv], [
38 am_cv_func_iconv="no, consider installing GNU libiconv"
39 am_cv_lib_iconv=no
40 AC_TRY_LINK([#include <stdlib.h>
41 #include <iconv.h>],
42 [iconv_t cd = iconv_open("","");
43 iconv(cd,NULL,NULL,NULL,NULL);
44 iconv_close(cd);],
45 [am_cv_func_iconv=yes])
46 if test "$am_cv_func_iconv" != yes; then
47 am_save_LIBS="$LIBS"
48 LIBS="$LIBS $LIBICONV"
49 AC_TRY_LINK([#include <stdlib.h>
50 #include <iconv.h>],
51 [iconv_t cd = iconv_open("","");
52 iconv(cd,NULL,NULL,NULL,NULL);
53 iconv_close(cd);],
54 [am_cv_lib_iconv=yes]
55 [am_cv_func_iconv=yes])
56 LIBS="$am_save_LIBS"
57 fi
58 ])
59 if test "$am_cv_func_iconv" = yes; then
60 AC_CACHE_CHECK([for working iconv], [am_cv_func_iconv_works], [
61 dnl This tests against bugs in AIX 5.1, HP-UX 11.11, Solaris 10.
62 am_save_LIBS="$LIBS"
63 if test $am_cv_lib_iconv = yes; then
64 LIBS="$LIBS $LIBICONV"
65 fi
66 AC_TRY_RUN([
67 #include <iconv.h>
68 #include <string.h>
69 int main ()
70 {
71 /* Test against AIX 5.1 bug: Failures are not distinguishable from successful
72 returns. */
73 {
74 iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8");
75 if (cd_utf8_to_88591 != (iconv_t)(-1))
76 {
77 static const char input[] = "\342\202\254"; /* EURO SIGN */
78 char buf[10];
79 const char *inptr = input;
80 size_t inbytesleft = strlen (input);
81 char *outptr = buf;
82 size_t outbytesleft = sizeof (buf);
83 size_t res = iconv (cd_utf8_to_88591,
84 (char **) &inptr, &inbytesleft,
85 &outptr, &outbytesleft);
86 if (res == 0)
87 return 1;
88 }
89 }
90 /* Test against Solaris 10 bug: Failures are not distinguishable from
91 successful returns. */
92 {
93 iconv_t cd_ascii_to_88591 = iconv_open ("ISO8859-1", "646");
94 if (cd_ascii_to_88591 != (iconv_t)(-1))
95 {
96 static const char input[] = "\263";
97 char buf[10];
98 const char *inptr = input;
99 size_t inbytesleft = strlen (input);
100 char *outptr = buf;
101 size_t outbytesleft = sizeof (buf);
102 size_t res = iconv (cd_ascii_to_88591,
103 (char **) &inptr, &inbytesleft,
104 &outptr, &outbytesleft);
105 if (res == 0)
106 return 1;
107 }
108 }
109 #if 0 /* This bug could be worked around by the caller. */
110 /* Test against HP-UX 11.11 bug: Positive return value instead of 0. */
111 {
112 iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591");
113 if (cd_88591_to_utf8 != (iconv_t)(-1))
114 {
115 static const char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
116 char buf[50];
117 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_88591_to_utf8,
122 (char **) &inptr, &inbytesleft,
123 &outptr, &outbytesleft);
124 if ((int)res > 0)
125 return 1;
126 }
127 }
128 #endif
129 /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is
130 provided. */
131 if (/* Try standardized names. */
132 iconv_open ("UTF-8", "EUC-JP") == (iconv_t)(-1)
133 /* Try IRIX, OSF/1 names. */
134 && iconv_open ("UTF-8", "eucJP") == (iconv_t)(-1)
135 /* Try AIX names. */
136 && iconv_open ("UTF-8", "IBM-eucJP") == (iconv_t)(-1)
137 /* Try HP-UX names. */
138 && iconv_open ("utf8", "eucJP") == (iconv_t)(-1))
139 return 1;
140 return 0;
141 }], [am_cv_func_iconv_works=yes], [am_cv_func_iconv_works=no],
142 [case "$host_os" in
143 aix* | hpux*) am_cv_func_iconv_works="guessing no" ;;
144 *) am_cv_func_iconv_works="guessing yes" ;;
145 esac])
146 LIBS="$am_save_LIBS"
147 ])
148 case "$am_cv_func_iconv_works" in
149 *no) am_func_iconv=no am_cv_lib_iconv=no ;;
150 *) am_func_iconv=yes ;;
151 esac
152 else
153 am_func_iconv=no am_cv_lib_iconv=no
154 fi
155 if test "$am_func_iconv" = yes; then
156 AC_DEFINE([HAVE_ICONV], [1],
157 [Define if you have the iconv() function and it works.])
158 fi
159 if test "$am_cv_lib_iconv" = yes; then
160 AC_MSG_CHECKING([how to link with libiconv])
161 AC_MSG_RESULT([$LIBICONV])
162 else
163 dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
164 dnl either.
165 CPPFLAGS="$am_save_CPPFLAGS"
166 LIBICONV=
167 LTLIBICONV=
168 fi
169 AC_SUBST([LIBICONV])
170 AC_SUBST([LTLIBICONV])
171 ])
172
173 dnl Define AM_ICONV using AC_DEFUN_ONCE for Autoconf >= 2.64, in order to
174 dnl avoid warnings like
175 dnl "warning: AC_REQUIRE: `AM_ICONV' was expanded before it was required".
176 dnl This is tricky because of the way 'aclocal' is implemented:
177 dnl - It requires defining an auxiliary macro whose name ends in AC_DEFUN.
178 dnl Otherwise aclocal's initial scan pass would miss the macro definition.
179 dnl - It requires a line break inside the AC_DEFUN_ONCE and AC_DEFUN expansions.
180 dnl Otherwise aclocal would emit many "Use of uninitialized value $1"
181 dnl warnings.
182 m4_define([gl_iconv_AC_DEFUN],
183 m4_version_prereq([2.64],
184 [[AC_DEFUN_ONCE(
185 [$1], [$2])]],
186 [[AC_DEFUN(
187 [$1], [$2])]]))
188 gl_iconv_AC_DEFUN([AM_ICONV],
189 [
190 AM_ICONV_LINK
191 if test "$am_cv_func_iconv" = yes; then
192 AC_MSG_CHECKING([for iconv declaration])
193 AC_CACHE_VAL([am_cv_proto_iconv], [
194 AC_TRY_COMPILE([
195 #include <stdlib.h>
196 #include <iconv.h>
197 extern
198 #ifdef __cplusplus
199 "C"
200 #endif
201 #if defined(__STDC__) || defined(__cplusplus)
202 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
203 #else
204 size_t iconv();
205 #endif
206 ], [], [am_cv_proto_iconv_arg1=""], [am_cv_proto_iconv_arg1="const"])
207 am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
208 am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
209 AC_MSG_RESULT([
210 $am_cv_proto_iconv])
211 AC_DEFINE_UNQUOTED([ICONV_CONST], [$am_cv_proto_iconv_arg1],
212 [Define as const if the declaration of iconv() needs const.])
213 fi
214 ])