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-rw-r--r--m4/iconv.m4101
1 files changed, 101 insertions, 0 deletions
diff --git a/m4/iconv.m4 b/m4/iconv.m4
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1# iconv.m4 serial AM4 (gettext-0.11.3)
2dnl Copyright (C) 2000-2002 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
25 dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
26 dnl accordingly.
27 AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
28
29 dnl Add $INCICONV to CPPFLAGS before performing the following checks,
30 dnl because if the user has installed libiconv and not disabled its use
31 dnl via --without-libiconv-prefix, he wants to use it. The first
32 dnl AC_TRY_LINK will then fail, the second AC_TRY_LINK will succeed.
33 am_save_CPPFLAGS="$CPPFLAGS"
34 AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])
35
36 AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [
37 am_cv_func_iconv="no, consider installing GNU libiconv"
38 am_cv_lib_iconv=no
39 AC_TRY_LINK([#include <stdlib.h>
40#include <iconv.h>],
41 [iconv_t cd = iconv_open("","");
42 iconv(cd,NULL,NULL,NULL,NULL);
43 iconv_close(cd);],
44 am_cv_func_iconv=yes)
45 if test "$am_cv_func_iconv" != yes; then
46 am_save_LIBS="$LIBS"
47 LIBS="$LIBS $LIBICONV"
48 AC_TRY_LINK([#include <stdlib.h>
49#include <iconv.h>],
50 [iconv_t cd = iconv_open("","");
51 iconv(cd,NULL,NULL,NULL,NULL);
52 iconv_close(cd);],
53 am_cv_lib_iconv=yes
54 am_cv_func_iconv=yes)
55 LIBS="$am_save_LIBS"
56 fi
57 ])
58 if test "$am_cv_func_iconv" = yes; then
59 AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
60 fi
61 if test "$am_cv_lib_iconv" = yes; then
62 AC_MSG_CHECKING([how to link with libiconv])
63 AC_MSG_RESULT([$LIBICONV])
64 else
65 dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
66 dnl either.
67 CPPFLAGS="$am_save_CPPFLAGS"
68 LIBICONV=
69 LTLIBICONV=
70 fi
71 AC_SUBST(LIBICONV)
72 AC_SUBST(LTLIBICONV)
73])
74
75AC_DEFUN([AM_ICONV],
76[
77 AM_ICONV_LINK
78 if test "$am_cv_func_iconv" = yes; then
79 AC_MSG_CHECKING([for iconv declaration])
80 AC_CACHE_VAL(am_cv_proto_iconv, [
81 AC_TRY_COMPILE([
82#include <stdlib.h>
83#include <iconv.h>
84extern
85#ifdef __cplusplus
86"C"
87#endif
88#if defined(__STDC__) || defined(__cplusplus)
89size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
90#else
91size_t iconv();
92#endif
93], [], am_cv_proto_iconv_arg1="", am_cv_proto_iconv_arg1="const")
94 am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
95 am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
96 AC_MSG_RESULT([$]{ac_t:-
97 }[$]am_cv_proto_iconv)
98 AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1,
99 [Define as const if the declaration of iconv() needs const.])
100 fi
101])