1# iconv.m4 serial 18 (gettext-0.18.2)
2dnl Copyright (C) 2000-2002, 2007-2013 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 Mednafen Modification
23  AC_LANG_PUSH(C)
24
25  dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
26  dnl those with the standalone portable GNU libiconv installed).
27  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
28
29  dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
30  dnl accordingly.
31  AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
32
33  dnl Add $INCICONV to CPPFLAGS before performing the following checks,
34  dnl because if the user has installed libiconv and not disabled its use
35  dnl via --without-libiconv-prefix, he wants to use it. The first
36  dnl AC_LINK_IFELSE will then fail, the second AC_LINK_IFELSE will succeed.
37  am_save_CPPFLAGS="$CPPFLAGS"
38  AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])
39
40  AC_CACHE_CHECK([for iconv], [am_cv_func_iconv], [
41    am_cv_func_iconv="no, consider installing GNU libiconv"
42    am_cv_lib_iconv=no
43    AC_LINK_IFELSE(
44      [AC_LANG_PROGRAM(
45         [[
46#include <stdlib.h>
47#include <iconv.h>
48         ]],
49         [[iconv_t cd = iconv_open("","");
50           iconv(cd,NULL,NULL,NULL,NULL);
51           iconv_close(cd);]])],
52      [am_cv_func_iconv=yes])
53    if test "$am_cv_func_iconv" != yes; then
54      am_save_LIBS="$LIBS"
55      LIBS="$LIBS $LIBICONV"
56      AC_LINK_IFELSE(
57        [AC_LANG_PROGRAM(
58           [[
59#include <stdlib.h>
60#include <iconv.h>
61           ]],
62           [[iconv_t cd = iconv_open("","");
63             iconv(cd,NULL,NULL,NULL,NULL);
64             iconv_close(cd);]])],
65        [am_cv_lib_iconv=yes]
66        [am_cv_func_iconv=yes])
67      LIBS="$am_save_LIBS"
68    fi
69  ])
70  if test "$am_cv_func_iconv" = yes; then
71    AC_CACHE_CHECK([for working iconv], [am_cv_func_iconv_works], [
72      dnl This tests against bugs in AIX 5.1, AIX 6.1..7.1, HP-UX 11.11,
73      dnl Solaris 10.
74      am_save_LIBS="$LIBS"
75      if test $am_cv_lib_iconv = yes; then
76        LIBS="$LIBS $LIBICONV"
77      fi
78      AC_RUN_IFELSE(
79        [AC_LANG_SOURCE([[
80#include <iconv.h>
81#include <string.h>
82int main ()
83{
84  int result = 0;
85  /* Test against AIX 5.1 bug: Failures are not distinguishable from successful
86     returns.  */
87  {
88    iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8");
89    if (cd_utf8_to_88591 != (iconv_t)(-1))
90      {
91        static const char input[] = "\342\202\254"; /* EURO SIGN */
92        char buf[10];
93        const char *inptr = input;
94        size_t inbytesleft = strlen (input);
95        char *outptr = buf;
96        size_t outbytesleft = sizeof (buf);
97        size_t res = iconv (cd_utf8_to_88591,
98                            (char **) &inptr, &inbytesleft,
99                            &outptr, &outbytesleft);
100        if (res == 0)
101          result |= 1;
102        iconv_close (cd_utf8_to_88591);
103      }
104  }
105  /* Test against Solaris 10 bug: Failures are not distinguishable from
106     successful returns.  */
107  {
108    iconv_t cd_ascii_to_88591 = iconv_open ("ISO8859-1", "646");
109    if (cd_ascii_to_88591 != (iconv_t)(-1))
110      {
111        static const char input[] = "\263";
112        char buf[10];
113        const char *inptr = input;
114        size_t inbytesleft = strlen (input);
115        char *outptr = buf;
116        size_t outbytesleft = sizeof (buf);
117        size_t res = iconv (cd_ascii_to_88591,
118                            (char **) &inptr, &inbytesleft,
119                            &outptr, &outbytesleft);
120        if (res == 0)
121          result |= 2;
122        iconv_close (cd_ascii_to_88591);
123      }
124  }
125  /* Test against AIX 6.1..7.1 bug: Buffer overrun.  */
126  {
127    iconv_t cd_88591_to_utf8 = iconv_open ("UTF-8", "ISO-8859-1");
128    if (cd_88591_to_utf8 != (iconv_t)(-1))
129      {
130        static const char input[] = "\304";
131        static char buf[2] = { (char)0xDE, (char)0xAD };
132        const char *inptr = input;
133        size_t inbytesleft = 1;
134        char *outptr = buf;
135        size_t outbytesleft = 1;
136        size_t res = iconv (cd_88591_to_utf8,
137                            (char **) &inptr, &inbytesleft,
138                            &outptr, &outbytesleft);
139        if (res != (size_t)(-1) || outptr - buf > 1 || buf[1] != (char)0xAD)
140          result |= 4;
141        iconv_close (cd_88591_to_utf8);
142      }
143  }
144#if 0 /* This bug could be worked around by the caller.  */
145  /* Test against HP-UX 11.11 bug: Positive return value instead of 0.  */
146  {
147    iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591");
148    if (cd_88591_to_utf8 != (iconv_t)(-1))
149      {
150        static const char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
151        char buf[50];
152        const char *inptr = input;
153        size_t inbytesleft = strlen (input);
154        char *outptr = buf;
155        size_t outbytesleft = sizeof (buf);
156        size_t res = iconv (cd_88591_to_utf8,
157                            (char **) &inptr, &inbytesleft,
158                            &outptr, &outbytesleft);
159        if ((int)res > 0)
160          result |= 8;
161        iconv_close (cd_88591_to_utf8);
162      }
163  }
164#endif
165  /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is
166     provided.  */
167  if (/* Try standardized names.  */
168      iconv_open ("UTF-8", "EUC-JP") == (iconv_t)(-1)
169      /* Try IRIX, OSF/1 names.  */
170      && iconv_open ("UTF-8", "eucJP") == (iconv_t)(-1)
171      /* Try AIX names.  */
172      && iconv_open ("UTF-8", "IBM-eucJP") == (iconv_t)(-1)
173      /* Try HP-UX names.  */
174      && iconv_open ("utf8", "eucJP") == (iconv_t)(-1))
175    result |= 16;
176  return result;
177}]])],
178        [am_cv_func_iconv_works=yes],
179        [am_cv_func_iconv_works=no],
180        [
181changequote(,)dnl
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
186changequote([,])dnl
187        ])
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  dnl Mednafen Modification
215  AC_LANG_POP(C)
216])
217
218dnl Define AM_ICONV using AC_DEFUN_ONCE for Autoconf >= 2.64, in order to
219dnl avoid warnings like
220dnl "warning: AC_REQUIRE: `AM_ICONV' was expanded before it was required".
221dnl This is tricky because of the way 'aclocal' is implemented:
222dnl - It requires defining an auxiliary macro whose name ends in AC_DEFUN.
223dnl   Otherwise aclocal's initial scan pass would miss the macro definition.
224dnl - It requires a line break inside the AC_DEFUN_ONCE and AC_DEFUN expansions.
225dnl   Otherwise aclocal would emit many "Use of uninitialized value $1"
226dnl   warnings.
227m4_define([gl_iconv_AC_DEFUN],
228  m4_version_prereq([2.64],
229    [[AC_DEFUN_ONCE(
230        [$1], [$2])]],
231    [m4_ifdef([gl_00GNULIB],
232       [[AC_DEFUN_ONCE(
233           [$1], [$2])]],
234       [[AC_DEFUN(
235           [$1], [$2])]])]))
236gl_iconv_AC_DEFUN([AM_ICONV],
237[
238  AM_ICONV_LINK
239  if test "$am_cv_func_iconv" = yes; then
240    AC_MSG_CHECKING([for iconv declaration])
241    AC_CACHE_VAL([am_cv_proto_iconv], [
242      AC_COMPILE_IFELSE(
243        [AC_LANG_PROGRAM(
244           [[
245#include <stdlib.h>
246#include <iconv.h>
247extern
248#ifdef __cplusplus
249"C"
250#endif
251#if defined(__STDC__) || defined(_MSC_VER) || defined(__cplusplus)
252size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
253#else
254size_t iconv();
255#endif
256           ]],
257           [[]])],
258        [am_cv_proto_iconv_arg1=""],
259        [am_cv_proto_iconv_arg1="const"])
260      am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
261    am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
262    AC_MSG_RESULT([
263         $am_cv_proto_iconv])
264    AC_DEFINE_UNQUOTED([ICONV_CONST], [$am_cv_proto_iconv_arg1],
265      [Define as const if the declaration of iconv() needs const.])
266    dnl Also substitute ICONV_CONST in the gnulib generated <iconv.h>.
267    m4_ifdef([gl_ICONV_H_DEFAULTS],
268      [AC_REQUIRE([gl_ICONV_H_DEFAULTS])
269       if test -n "$am_cv_proto_iconv_arg1"; then
270         ICONV_CONST="const"
271       fi
272      ])
273  fi
274])
275