1# iconv.m4 serial AM6 (gettext-0.17)
2dnl Copyright (C) 2000, 2001, 2002, 2007, 2009 Free Software Foundation,
3dnl Inc.
4dnl This file is free software; the Free Software Foundation
5dnl gives unlimited permission to copy and/or distribute it,
6dnl with or without modifications, as long as this notice is preserved.
7
8dnl From Bruno Haible.
9
10AC_DEFUN([AM_ICONV_LINKFLAGS_BODY],
11[
12  dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
13  AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
14  AC_REQUIRE([AC_LIB_RPATH])
15
16  dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
17  dnl accordingly.
18  AC_LIB_LINKFLAGS_BODY([iconv])
19])
20
21AC_DEFUN([AM_ICONV_LINK],
22[
23  dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
24  dnl those with the standalone portable GNU libiconv installed).
25  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
26
27  dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
28  dnl accordingly.
29  AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
30
31  dnl Add $INCICONV to CPPFLAGS before performing the following checks,
32  dnl because if the user has installed libiconv and not disabled its use
33  dnl via --without-libiconv-prefix, he wants to use it. The first
34  dnl AC_TRY_LINK will then fail, the second AC_TRY_LINK will succeed.
35  am_save_CPPFLAGS="$CPPFLAGS"
36  AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])
37
38  AC_CACHE_CHECK([for iconv], am_cv_func_iconv, [
39    am_cv_func_iconv="no, consider installing GNU libiconv"
40    am_cv_lib_iconv=no
41    AC_TRY_LINK([#include <stdlib.h>
42#include <iconv.h>],
43      [iconv_t cd = iconv_open("","");
44       iconv(cd,NULL,NULL,NULL,NULL);
45       iconv_close(cd);],
46      am_cv_func_iconv=yes)
47    if test "$am_cv_func_iconv" != yes; then
48      am_save_LIBS="$LIBS"
49      LIBS="$LIBS $LIBICONV"
50      AC_TRY_LINK([#include <stdlib.h>
51#include <iconv.h>],
52        [iconv_t cd = iconv_open("","");
53         iconv(cd,NULL,NULL,NULL,NULL);
54         iconv_close(cd);],
55        am_cv_lib_iconv=yes
56        am_cv_func_iconv=yes)
57      LIBS="$am_save_LIBS"
58    fi
59  ])
60  if test "$am_cv_func_iconv" = yes; then
61    AC_CACHE_CHECK([for working iconv], am_cv_func_iconv_works, [
62      dnl This tests against bugs in AIX 5.1 and HP-UX 11.11.
63      am_save_LIBS="$LIBS"
64      if test $am_cv_lib_iconv = yes; then
65        LIBS="$LIBS $LIBICONV"
66      fi
67      AC_TRY_RUN([
68#include <iconv.h>
69#include <string.h>
70int main ()
71{
72  /* Test against AIX 5.1 bug: Failures are not distinguishable from successful
73     returns.  */
74  {
75    iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8");
76    if (cd_utf8_to_88591 != (iconv_t)(-1))
77      {
78        static const char input[] = "\342\202\254"; /* EURO SIGN */
79        char buf[10];
80        const char *inptr = input;
81        size_t inbytesleft = strlen (input);
82        char *outptr = buf;
83        size_t outbytesleft = sizeof (buf);
84        size_t res = iconv (cd_utf8_to_88591,
85                            (char **) &inptr, &inbytesleft,
86                            &outptr, &outbytesleft);
87        if (res == 0)
88          return 1;
89      }
90  }
91#if 0 /* This bug could be worked around by the caller.  */
92  /* Test against HP-UX 11.11 bug: Positive return value instead of 0.  */
93  {
94    iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591");
95    if (cd_88591_to_utf8 != (iconv_t)(-1))
96      {
97        static const char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
98        char buf[50];
99        const char *inptr = input;
100        size_t inbytesleft = strlen (input);
101        char *outptr = buf;
102        size_t outbytesleft = sizeof (buf);
103        size_t res = iconv (cd_88591_to_utf8,
104                            (char **) &inptr, &inbytesleft,
105                            &outptr, &outbytesleft);
106        if ((int)res > 0)
107          return 1;
108      }
109  }
110#endif
111  /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is
112     provided.  */
113  if (/* Try standardized names.  */
114      iconv_open ("UTF-8", "EUC-JP") == (iconv_t)(-1)
115      /* Try IRIX, OSF/1 names.  */
116      && iconv_open ("UTF-8", "eucJP") == (iconv_t)(-1)
117      /* Try AIX names.  */
118      && iconv_open ("UTF-8", "IBM-eucJP") == (iconv_t)(-1)
119      /* Try HP-UX names.  */
120      && iconv_open ("utf8", "eucJP") == (iconv_t)(-1))
121    return 1;
122  return 0;
123}], [am_cv_func_iconv_works=yes], [am_cv_func_iconv_works=no],
124        [case "$host_os" in
125           aix* | hpux*) am_cv_func_iconv_works="guessing no" ;;
126           *)            am_cv_func_iconv_works="guessing yes" ;;
127         esac])
128      LIBS="$am_save_LIBS"
129    ])
130    case "$am_cv_func_iconv_works" in
131      *no) am_func_iconv=no am_cv_lib_iconv=no ;;
132      *)   am_func_iconv=yes ;;
133    esac
134  else
135    am_func_iconv=no am_cv_lib_iconv=no
136  fi
137  if test "$am_func_iconv" = yes; then
138    AC_DEFINE(HAVE_ICONV, 1,
139      [Define if you have the iconv() function and it works.])
140  fi
141  if test "$am_cv_lib_iconv" = yes; then
142    AC_MSG_CHECKING([how to link with libiconv])
143    AC_MSG_RESULT([$LIBICONV])
144  else
145    dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
146    dnl either.
147    CPPFLAGS="$am_save_CPPFLAGS"
148    LIBICONV=
149    LTLIBICONV=
150  fi
151  AC_SUBST(LIBICONV)
152  AC_SUBST(LTLIBICONV)
153])
154
155AC_DEFUN([AM_ICONV],
156[
157  AM_ICONV_LINK
158  if test "$am_cv_func_iconv" = yes; then
159    AC_MSG_CHECKING([for iconv declaration])
160    AC_CACHE_VAL(am_cv_proto_iconv, [
161      AC_TRY_COMPILE([
162#include <stdlib.h>
163#include <iconv.h>
164extern
165#ifdef __cplusplus
166"C"
167#endif
168#if defined(__STDC__) || defined(__cplusplus)
169size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
170#else
171size_t iconv();
172#endif
173], [], am_cv_proto_iconv_arg1="", am_cv_proto_iconv_arg1="const")
174      am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
175    am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
176    AC_MSG_RESULT([$]{ac_t:-
177         }[$]am_cv_proto_iconv)
178    AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1,
179      [Define as const if the declaration of iconv() needs const.])
180  fi
181])
182