1# iconv.m4 serial 18 (gettext-0.18.2)
2dnl Copyright (C) 2000-2002, 2007-2012 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      AC_RUN_IFELSE(
76        [AC_LANG_SOURCE([[
77#include <iconv.h>
78#include <string.h>
79int main ()
80{
81  int result = 0;
82  /* Test against AIX 5.1 bug: Failures are not distinguishable from successful
83     returns.  */
84  {
85    iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8");
86    if (cd_utf8_to_88591 != (iconv_t)(-1))
87      {
88        static const char input[] = "\342\202\254"; /* EURO SIGN */
89        char buf[10];
90        const char *inptr = input;
91        size_t inbytesleft = strlen (input);
92        char *outptr = buf;
93        size_t outbytesleft = sizeof (buf);
94        size_t res = iconv (cd_utf8_to_88591,
95                            (char **) &inptr, &inbytesleft,
96                            &outptr, &outbytesleft);
97        if (res == 0)
98          result |= 1;
99        iconv_close (cd_utf8_to_88591);
100      }
101  }
102  /* Test against Solaris 10 bug: Failures are not distinguishable from
103     successful returns.  */
104  {
105    iconv_t cd_ascii_to_88591 = iconv_open ("ISO8859-1", "646");
106    if (cd_ascii_to_88591 != (iconv_t)(-1))
107      {
108        static const char input[] = "\263";
109        char buf[10];
110        const char *inptr = input;
111        size_t inbytesleft = strlen (input);
112        char *outptr = buf;
113        size_t outbytesleft = sizeof (buf);
114        size_t res = iconv (cd_ascii_to_88591,
115                            (char **) &inptr, &inbytesleft,
116                            &outptr, &outbytesleft);
117        if (res == 0)
118          result |= 2;
119        iconv_close (cd_ascii_to_88591);
120      }
121  }
122  /* Test against AIX 6.1..7.1 bug: Buffer overrun.  */
123  {
124    iconv_t cd_88591_to_utf8 = iconv_open ("UTF-8", "ISO-8859-1");
125    if (cd_88591_to_utf8 != (iconv_t)(-1))
126      {
127        static const char input[] = "\304";
128        static char buf[2] = { (char)0xDE, (char)0xAD };
129        const char *inptr = input;
130        size_t inbytesleft = 1;
131        char *outptr = buf;
132        size_t outbytesleft = 1;
133        size_t res = iconv (cd_88591_to_utf8,
134                            (char **) &inptr, &inbytesleft,
135                            &outptr, &outbytesleft);
136        if (res != (size_t)(-1) || outptr - buf > 1 || buf[1] != (char)0xAD)
137          result |= 4;
138        iconv_close (cd_88591_to_utf8);
139      }
140  }
141#if 0 /* This bug could be worked around by the caller.  */
142  /* Test against HP-UX 11.11 bug: Positive return value instead of 0.  */
143  {
144    iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591");
145    if (cd_88591_to_utf8 != (iconv_t)(-1))
146      {
147        static const char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
148        char buf[50];
149        const char *inptr = input;
150        size_t inbytesleft = strlen (input);
151        char *outptr = buf;
152        size_t outbytesleft = sizeof (buf);
153        size_t res = iconv (cd_88591_to_utf8,
154                            (char **) &inptr, &inbytesleft,
155                            &outptr, &outbytesleft);
156        if ((int)res > 0)
157          result |= 8;
158        iconv_close (cd_88591_to_utf8);
159      }
160  }
161#endif
162  /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is
163     provided.  */
164  if (/* Try standardized names.  */
165      iconv_open ("UTF-8", "EUC-JP") == (iconv_t)(-1)
166      /* Try IRIX, OSF/1 names.  */
167      && iconv_open ("UTF-8", "eucJP") == (iconv_t)(-1)
168      /* Try AIX names.  */
169      && iconv_open ("UTF-8", "IBM-eucJP") == (iconv_t)(-1)
170      /* Try HP-UX names.  */
171      && iconv_open ("utf8", "eucJP") == (iconv_t)(-1))
172    result |= 16;
173  return result;
174}]])],
175        [am_cv_func_iconv_works=yes],
176        [am_cv_func_iconv_works=no],
177        [
178changequote(,)dnl
179         case "$host_os" in
180           aix* | hpux*) am_cv_func_iconv_works="guessing no" ;;
181           *)            am_cv_func_iconv_works="guessing yes" ;;
182         esac
183changequote([,])dnl
184        ])
185      LIBS="$am_save_LIBS"
186    ])
187    case "$am_cv_func_iconv_works" in
188      *no) am_func_iconv=no am_cv_lib_iconv=no ;;
189      *)   am_func_iconv=yes ;;
190    esac
191  else
192    am_func_iconv=no am_cv_lib_iconv=no
193  fi
194  if test "$am_func_iconv" = yes; then
195    AC_DEFINE([HAVE_ICONV], [1],
196      [Define if you have the iconv() function and it works.])
197  fi
198  if test "$am_cv_lib_iconv" = yes; then
199    AC_MSG_CHECKING([how to link with libiconv])
200    AC_MSG_RESULT([$LIBICONV])
201  else
202    dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
203    dnl either.
204    CPPFLAGS="$am_save_CPPFLAGS"
205    LIBICONV=
206    LTLIBICONV=
207  fi
208  AC_SUBST([LIBICONV])
209  AC_SUBST([LTLIBICONV])
210])
211
212dnl Define AM_ICONV using AC_DEFUN_ONCE for Autoconf >= 2.64, in order to
213dnl avoid warnings like
214dnl "warning: AC_REQUIRE: `AM_ICONV' was expanded before it was required".
215dnl This is tricky because of the way 'aclocal' is implemented:
216dnl - It requires defining an auxiliary macro whose name ends in AC_DEFUN.
217dnl   Otherwise aclocal's initial scan pass would miss the macro definition.
218dnl - It requires a line break inside the AC_DEFUN_ONCE and AC_DEFUN expansions.
219dnl   Otherwise aclocal would emit many "Use of uninitialized value $1"
220dnl   warnings.
221m4_define([gl_iconv_AC_DEFUN],
222  m4_version_prereq([2.64],
223    [[AC_DEFUN_ONCE(
224        [$1], [$2])]],
225    [m4_ifdef([gl_00GNULIB],
226       [[AC_DEFUN_ONCE(
227           [$1], [$2])]],
228       [[AC_DEFUN(
229           [$1], [$2])]])]))
230gl_iconv_AC_DEFUN([AM_ICONV],
231[
232  AM_ICONV_LINK
233  if test "$am_cv_func_iconv" = yes; then
234    AC_MSG_CHECKING([for iconv declaration])
235    AC_CACHE_VAL([am_cv_proto_iconv], [
236      AC_COMPILE_IFELSE(
237        [AC_LANG_PROGRAM(
238           [[
239#include <stdlib.h>
240#include <iconv.h>
241extern
242#ifdef __cplusplus
243"C"
244#endif
245#if defined(__STDC__) || defined(_MSC_VER) || defined(__cplusplus)
246size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
247#else
248size_t iconv();
249#endif
250           ]],
251           [[]])],
252        [am_cv_proto_iconv_arg1=""],
253        [am_cv_proto_iconv_arg1="const"])
254      am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
255    am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
256    AC_MSG_RESULT([
257         $am_cv_proto_iconv])
258    AC_DEFINE_UNQUOTED([ICONV_CONST], [$am_cv_proto_iconv_arg1],
259      [Define as const if the declaration of iconv() needs const.])
260    dnl Also substitute ICONV_CONST in the gnulib generated <iconv.h>.
261    m4_ifdef([gl_ICONV_H_DEFAULTS],
262      [AC_REQUIRE([gl_ICONV_H_DEFAULTS])
263       if test -n "$am_cv_proto_iconv_arg1"; then
264         ICONV_CONST="const"
265       fi
266      ])
267  fi
268])
269