/[jscoverage]/trunk/m4/iconv.m4
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Contents of /trunk/m4/iconv.m4

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Revision 174 - (show annotations)
Sat Sep 20 23:27:14 2008 UTC (11 years, 2 months ago) by siliconforks
File size: 6123 byte(s)
Provide better character encoding support.
1 # iconv.m4 serial AM6 (gettext-0.17)
2 dnl Copyright (C) 2000-2002, 2007 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
6
7 dnl From Bruno Haible.
8
9 AC_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
20 AC_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 $LIBICONV"
65 fi
66 AC_TRY_RUN([
67 #include <iconv.h>
68 #include <string.h>
69 int main ()
70 {
71 /* Test against AIX 5.1 bug: Failures are not distinguishable from successful
72 returns. */
73 {
74 iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8");
75 if (cd_utf8_to_88591 != (iconv_t)(-1))
76 {
77 static const char input[] = "\342\202\254"; /* EURO SIGN */
78 char buf[10];
79 const char *inptr = input;
80 size_t inbytesleft = strlen (input);
81 char *outptr = buf;
82 size_t outbytesleft = sizeof (buf);
83 size_t res = iconv (cd_utf8_to_88591,
84 (char **) &inptr, &inbytesleft,
85 &outptr, &outbytesleft);
86 if (res == 0)
87 return 1;
88 }
89 }
90 #if 0 /* This bug could be worked around by the caller. */
91 /* Test against HP-UX 11.11 bug: Positive return value instead of 0. */
92 {
93 iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591");
94 if (cd_88591_to_utf8 != (iconv_t)(-1))
95 {
96 static const char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
97 char buf[50];
98 const char *inptr = input;
99 size_t inbytesleft = strlen (input);
100 char *outptr = buf;
101 size_t outbytesleft = sizeof (buf);
102 size_t res = iconv (cd_88591_to_utf8,
103 (char **) &inptr, &inbytesleft,
104 &outptr, &outbytesleft);
105 if ((int)res > 0)
106 return 1;
107 }
108 }
109 #endif
110 /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is
111 provided. */
112 if (/* Try standardized names. */
113 iconv_open ("UTF-8", "EUC-JP") == (iconv_t)(-1)
114 /* Try IRIX, OSF/1 names. */
115 && iconv_open ("UTF-8", "eucJP") == (iconv_t)(-1)
116 /* Try AIX names. */
117 && iconv_open ("UTF-8", "IBM-eucJP") == (iconv_t)(-1)
118 /* Try HP-UX names. */
119 && iconv_open ("utf8", "eucJP") == (iconv_t)(-1))
120 return 1;
121 return 0;
122 }], [am_cv_func_iconv_works=yes], [am_cv_func_iconv_works=no],
123 [case "$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
154 AC_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>
163 extern
164 #ifdef __cplusplus
165 "C"
166 #endif
167 #if defined(__STDC__) || defined(__cplusplus)
168 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
169 #else
170 size_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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