1# iconv.m4 serial 19 (gettext-0.18.2)
2dnl Copyright (C) 2000-2002, 2007-2014 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7dnl From Bruno Haible.
8
9AC_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
20AC_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 $INCICONV to CPPFLAGS before performing the following checks,
31  dnl because if the user has installed libiconv and not disabled its use
32  dnl via --without-libiconv-prefix, he wants to use it. The first
33  dnl AC_LINK_IFELSE will then fail, the second AC_LINK_IFELSE will succeed.
34  am_save_CPPFLAGS="$CPPFLAGS"
35  AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])
36
37  AC_CACHE_CHECK([for iconv], [am_cv_func_iconv], [
38    am_cv_func_iconv="no, consider installing GNU libiconv"
39    am_cv_lib_iconv=no
40    AC_LINK_IFELSE(
41      [AC_LANG_PROGRAM(
42         [[
43#include <stdlib.h>
44#include <iconv.h>
45         ]],
46         [[iconv_t cd = iconv_open("","");
47           iconv(cd,NULL,NULL,NULL,NULL);
48           iconv_close(cd);]])],
49      [am_cv_func_iconv=yes])
50    if test "$am_cv_func_iconv" != yes; then
51      am_save_LIBS="$LIBS"
52      LIBS="$LIBS $LIBICONV"
53      AC_LINK_IFELSE(
54        [AC_LANG_PROGRAM(
55           [[
56#include <stdlib.h>
57#include <iconv.h>
58           ]],
59           [[iconv_t cd = iconv_open("","");
60             iconv(cd,NULL,NULL,NULL,NULL);
61             iconv_close(cd);]])],
62        [am_cv_lib_iconv=yes]
63        [am_cv_func_iconv=yes])
64      LIBS="$am_save_LIBS"
65    fi
66  ])
67  if test "$am_cv_func_iconv" = yes; then
68    AC_CACHE_CHECK([for working iconv], [am_cv_func_iconv_works], [
69      dnl This tests against bugs in AIX 5.1, AIX 6.1..7.1, HP-UX 11.11,
70      dnl Solaris 10.
71      am_save_LIBS="$LIBS"
72      if test $am_cv_lib_iconv = yes; then
73        LIBS="$LIBS $LIBICONV"
74      fi
75      am_cv_func_iconv_works=no
76      for ac_iconv_const in '' 'const'; do
77        AC_RUN_IFELSE(
78          [AC_LANG_PROGRAM(
79             [[
80#include <iconv.h>
81#include <string.h>
82
83#ifndef ICONV_CONST
84# define ICONV_CONST $ac_iconv_const
85#endif
86             ]],
87             [[int result = 0;
88  /* Test against AIX 5.1 bug: Failures are not distinguishable from successful
89     returns.  */
90  {
91    iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8");
92    if (cd_utf8_to_88591 != (iconv_t)(-1))
93      {
94        static ICONV_CONST char input[] = "\342\202\254"; /* EURO SIGN */
95        char buf[10];
96        ICONV_CONST char *inptr = input;
97        size_t inbytesleft = strlen (input);
98        char *outptr = buf;
99        size_t outbytesleft = sizeof (buf);
100        size_t res = iconv (cd_utf8_to_88591,
101                            &inptr, &inbytesleft,
102                            &outptr, &outbytesleft);
103        if (res == 0)
104          result |= 1;
105        iconv_close (cd_utf8_to_88591);
106      }
107  }
108  /* Test against Solaris 10 bug: Failures are not distinguishable from
109     successful returns.  */
110  {
111    iconv_t cd_ascii_to_88591 = iconv_open ("ISO8859-1", "646");
112    if (cd_ascii_to_88591 != (iconv_t)(-1))
113      {
114        static ICONV_CONST char input[] = "\263";
115        char buf[10];
116        ICONV_CONST char *inptr = input;
117        size_t inbytesleft = strlen (input);
118        char *outptr = buf;
119        size_t outbytesleft = sizeof (buf);
120        size_t res = iconv (cd_ascii_to_88591,
121                            &inptr, &inbytesleft,
122                            &outptr, &outbytesleft);
123        if (res == 0)
124          result |= 2;
125        iconv_close (cd_ascii_to_88591);
126      }
127  }
128  /* Test against AIX 6.1..7.1 bug: Buffer overrun.  */
129  {
130    iconv_t cd_88591_to_utf8 = iconv_open ("UTF-8", "ISO-8859-1");
131    if (cd_88591_to_utf8 != (iconv_t)(-1))
132      {
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;
137        char *outptr = buf;
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)
143          result |= 4;
144        iconv_close (cd_88591_to_utf8);
145      }
146  }
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.  */
149  {
150    iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591");
151    if (cd_88591_to_utf8 != (iconv_t)(-1))
152      {
153        static ICONV_CONST char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
154        char buf[50];
155        ICONV_CONST char *inptr = input;
156        size_t inbytesleft = strlen (input);
157        char *outptr = buf;
158        size_t outbytesleft = sizeof (buf);
159        size_t res = iconv (cd_88591_to_utf8,
160                            &inptr, &inbytesleft,
161                            &outptr, &outbytesleft);
162        if ((int)res > 0)
163          result |= 8;
164        iconv_close (cd_88591_to_utf8);
165      }
166  }
167#endif
168  /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is
169     provided.  */
170  if (/* Try standardized names.  */
171      iconv_open ("UTF-8", "EUC-JP") == (iconv_t)(-1)
172      /* Try IRIX, OSF/1 names.  */
173      && iconv_open ("UTF-8", "eucJP") == (iconv_t)(-1)
174      /* Try AIX names.  */
175      && iconv_open ("UTF-8", "IBM-eucJP") == (iconv_t)(-1)
176      /* Try HP-UX names.  */
177      && iconv_open ("utf8", "eucJP") == (iconv_t)(-1))
178    result |= 16;
179  return result;
180]])],
181          [am_cv_func_iconv_works=yes], ,
182          [case "$host_os" in
183             aix* | hpux*) am_cv_func_iconv_works="guessing no" ;;
184             *)            am_cv_func_iconv_works="guessing yes" ;;
185           esac])
186        test "$am_cv_func_iconv_works" = no || break
187      done
188      LIBS="$am_save_LIBS"
189    ])
190    case "$am_cv_func_iconv_works" in
191      *no) am_func_iconv=no am_cv_lib_iconv=no ;;
192      *)   am_func_iconv=yes ;;
193    esac
194  else
195    am_func_iconv=no am_cv_lib_iconv=no
196  fi
197  if test "$am_func_iconv" = yes; then
198    AC_DEFINE([HAVE_ICONV], [1],
199      [Define if you have the iconv() function and it works.])
200  fi
201  if test "$am_cv_lib_iconv" = yes; then
202    AC_MSG_CHECKING([how to link with libiconv])
203    AC_MSG_RESULT([$LIBICONV])
204  else
205    dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
206    dnl either.
207    CPPFLAGS="$am_save_CPPFLAGS"
208    LIBICONV=
209    LTLIBICONV=
210  fi
211  AC_SUBST([LIBICONV])
212  AC_SUBST([LTLIBICONV])
213])
214
215dnl Define AM_ICONV using AC_DEFUN_ONCE for Autoconf >= 2.64, in order to
216dnl avoid warnings like
217dnl "warning: AC_REQUIRE: `AM_ICONV' was expanded before it was required".
218dnl This is tricky because of the way 'aclocal' is implemented:
219dnl - It requires defining an auxiliary macro whose name ends in AC_DEFUN.
220dnl   Otherwise aclocal's initial scan pass would miss the macro definition.
221dnl - It requires a line break inside the AC_DEFUN_ONCE and AC_DEFUN expansions.
222dnl   Otherwise aclocal would emit many "Use of uninitialized value $1"
223dnl   warnings.
224m4_define([gl_iconv_AC_DEFUN],
225  m4_version_prereq([2.64],
226    [[AC_DEFUN_ONCE(
227        [$1], [$2])]],
228    [m4_ifdef([gl_00GNULIB],
229       [[AC_DEFUN_ONCE(
230           [$1], [$2])]],
231       [[AC_DEFUN(
232           [$1], [$2])]])]))
233gl_iconv_AC_DEFUN([AM_ICONV],
234[
235  AM_ICONV_LINK
236  if test "$am_cv_func_iconv" = yes; then
237    AC_MSG_CHECKING([for iconv declaration])
238    AC_CACHE_VAL([am_cv_proto_iconv], [
239      AC_COMPILE_IFELSE(
240        [AC_LANG_PROGRAM(
241           [[
242#include <stdlib.h>
243#include <iconv.h>
244extern
245#ifdef __cplusplus
246"C"
247#endif
248#if defined(__STDC__) || defined(_MSC_VER) || defined(__cplusplus)
249size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
250#else
251size_t iconv();
252#endif
253           ]],
254           [[]])],
255        [am_cv_proto_iconv_arg1=""],
256        [am_cv_proto_iconv_arg1="const"])
257      am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
258    am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
259    AC_MSG_RESULT([
260         $am_cv_proto_iconv])
261    AC_DEFINE_UNQUOTED([ICONV_CONST], [$am_cv_proto_iconv_arg1],
262      [Define as const if the declaration of iconv() needs const.])
263    dnl Also substitute ICONV_CONST in the gnulib generated <iconv.h>.
264    m4_ifdef([gl_ICONV_H_DEFAULTS],
265      [AC_REQUIRE([gl_ICONV_H_DEFAULTS])
266       if test -n "$am_cv_proto_iconv_arg1"; then
267         ICONV_CONST="const"
268       fi
269      ])
270  fi
271])
272