source: trunk/m4/iconv.m4 @ 7104

Last change on this file since 7104 was 7104, checked in by charles, 14 years ago

follow glib-gettextize's suggestion of adding these to the m4 directory

File size: 6.0 KB
Line 
1# iconv.m4 serial AM6 (gettext-0.17)
2dnl Copyright (C) 2000-2002, 2007 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 $INCICONV to CPPFLAGS before performing the following checks,
31  dnl because if the user has installed libiconv and not disabled its use
32  dnl via --without-libiconv-prefix, he wants to use it. The first
33  dnl AC_TRY_LINK will then fail, the second AC_TRY_LINK will succeed.
34  am_save_CPPFLAGS="$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 "$am_cv_func_iconv" = yes; then
60    AC_CACHE_CHECK([for working iconv], am_cv_func_iconv_works, [
61      dnl This tests against bugs in AIX 5.1 and HP-UX 11.11.
62      am_save_LIBS="$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>
69int 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#if 0 /* This bug could be worked around by the caller.  */
91  /* Test against HP-UX 11.11 bug: Positive return value instead of 0.  */
92  {
93    iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591");
94    if (cd_88591_to_utf8 != (iconv_t)(-1))
95      {
96        static const char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
97        char buf[50];
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_88591_to_utf8,
103                            (char **) &inptr, &inbytesleft,
104                            &outptr, &outbytesleft);
105        if ((int)res > 0)
106          return 1;
107      }
108  }
109#endif
110  /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is
111     provided.  */
112  if (/* Try standardized names.  */
113      iconv_open ("UTF-8", "EUC-JP") == (iconv_t)(-1)
114      /* Try IRIX, OSF/1 names.  */
115      && iconv_open ("UTF-8", "eucJP") == (iconv_t)(-1)
116      /* Try AIX names.  */
117      && iconv_open ("UTF-8", "IBM-eucJP") == (iconv_t)(-1)
118      /* Try HP-UX names.  */
119      && iconv_open ("utf8", "eucJP") == (iconv_t)(-1))
120    return 1;
121  return 0;
122}], [am_cv_func_iconv_works=yes], [am_cv_func_iconv_works=no],
123        [case "$host_os" in
124           aix* | hpux*) am_cv_func_iconv_works="guessing no" ;;
125           *)            am_cv_func_iconv_works="guessing yes" ;;
126         esac])
127      LIBS="$am_save_LIBS"
128    ])
129    case "$am_cv_func_iconv_works" in
130      *no) am_func_iconv=no am_cv_lib_iconv=no ;;
131      *)   am_func_iconv=yes ;;
132    esac
133  else
134    am_func_iconv=no am_cv_lib_iconv=no
135  fi
136  if test "$am_func_iconv" = yes; then
137    AC_DEFINE(HAVE_ICONV, 1,
138      [Define if you have the iconv() function and it works.])
139  fi
140  if test "$am_cv_lib_iconv" = yes; then
141    AC_MSG_CHECKING([how to link with libiconv])
142    AC_MSG_RESULT([$LIBICONV])
143  else
144    dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
145    dnl either.
146    CPPFLAGS="$am_save_CPPFLAGS"
147    LIBICONV=
148    LTLIBICONV=
149  fi
150  AC_SUBST(LIBICONV)
151  AC_SUBST(LTLIBICONV)
152])
153
154AC_DEFUN([AM_ICONV],
155[
156  AM_ICONV_LINK
157  if test "$am_cv_func_iconv" = yes; then
158    AC_MSG_CHECKING([for iconv declaration])
159    AC_CACHE_VAL(am_cv_proto_iconv, [
160      AC_TRY_COMPILE([
161#include <stdlib.h>
162#include <iconv.h>
163extern
164#ifdef __cplusplus
165"C"
166#endif
167#if defined(__STDC__) || defined(__cplusplus)
168size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
169#else
170size_t iconv();
171#endif
172], [], am_cv_proto_iconv_arg1="", am_cv_proto_iconv_arg1="const")
173      am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
174    am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
175    AC_MSG_RESULT([$]{ac_t:-
176         }[$]am_cv_proto_iconv)
177    AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1,
178      [Define as const if the declaration of iconv() needs const.])
179  fi
180])
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