1 # iconv.m4 serial AM5 (gettext-0.16.2)
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.
9 AC_DEFUN([AM_ICONV_LINKFLAGS_BODY],
11 dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
12 AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
13 AC_REQUIRE([AC_LIB_RPATH])
15 dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
17 AC_LIB_LINKFLAGS_BODY([iconv])
20 AC_DEFUN([AM_ICONV_LINK],
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
26 dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
28 AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
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], [$INCICONV])
37 AC_CACHE_CHECK([for iconv], am_cv_func_iconv, [
38 am_cv_func_iconv="no, consider installing GNU libiconv"
40 AC_TRY_LINK([#include <stdlib.h>
42 [iconv_t cd = iconv_open("","");
43 iconv(cd,NULL,NULL,NULL,NULL);
46 if test "$am_cv_func_iconv" != yes; then
48 LIBS="$LIBS $LIBICONV"
49 AC_TRY_LINK([#include <stdlib.h>
51 [iconv_t cd = iconv_open("","");
52 iconv(cd,NULL,NULL,NULL,NULL);
59 if test "$am_cv_func_iconv" = yes; then
60 AC_CACHE_CHECK([for working iconv], am_cv_func_iconv_works, [
61 dnl This tests against a bug in AIX 5.1: failures are not distinguishable
62 dnl from successul returns.
64 if test $am_cv_lib_iconv = yes; then
65 LIBS="$LIBS $LIBICONV"
70 static const char input[] = "\342\202\254"; /* EURO SIGN */
71 iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8");
72 if (cd_utf8_to_88591 != (iconv_t)(-1))
75 const char *inptr = input;
76 size_t inbytesleft = strlen (input);
78 size_t outbytesleft = sizeof (buf);
79 size_t res = iconv (cd_utf8_to_88591,
80 (char **) &inptr, &inbytesleft,
81 &outptr, &outbytesleft);
86 }], [am_cv_func_iconv_works=yes], [am_cv_func_iconv_works=no],
88 aix*) am_cv_func_iconv_works="guessing no" ;;
89 *) am_cv_func_iconv_works="guessing yes" ;;
93 case "$am_cv_func_iconv_works" in
94 *no) am_func_iconv=no am_cv_lib_iconv=no ;;
95 *) am_func_iconv=yes ;;
98 am_func_iconv=no am_cv_lib_iconv=no
100 if test "$am_func_iconv" = yes; then
101 AC_DEFINE(HAVE_ICONV, 1,
102 [Define if you have the iconv() function and it works.])
104 if test "$am_cv_lib_iconv" = yes; then
105 AC_MSG_CHECKING([how to link with libiconv])
106 AC_MSG_RESULT([$LIBICONV])
108 dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
110 CPPFLAGS="$am_save_CPPFLAGS"
121 if test "$am_cv_func_iconv" = yes; then
122 AC_MSG_CHECKING([for iconv declaration])
123 AC_CACHE_VAL(am_cv_proto_iconv, [
131 #if defined(__STDC__) || defined(__cplusplus)
132 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
136 ], [], am_cv_proto_iconv_arg1="", am_cv_proto_iconv_arg1="const")
137 am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
138 am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
139 AC_MSG_RESULT([$]{ac_t:-
140 }[$]am_cv_proto_iconv)
141 AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1,
142 [Define as const if the declaration of iconv() needs const.])