1 # iconv.m4 serial AM4 (gettext-0.11.3)
2 dnl Copyright (C) 2000-2002, 2009, 2010 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).
25 dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
27 AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
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], [$INCICONV])
36 AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [
37 am_cv_func_iconv="no, consider installing GNU libiconv"
39 AC_TRY_LINK([#include <stdlib.h>
41 [iconv_t cd = iconv_open("","");
42 iconv(cd,NULL,NULL,NULL,NULL);
45 if test "$am_cv_func_iconv" != yes; then
47 LIBS="$LIBS $LIBICONV"
48 AC_TRY_LINK([#include <stdlib.h>
50 [iconv_t cd = iconv_open("","");
51 iconv(cd,NULL,NULL,NULL,NULL);
58 if test "$am_cv_func_iconv" = yes; then
59 AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
61 if test "$am_cv_lib_iconv" = yes; then
62 AC_MSG_CHECKING([how to link with libiconv])
63 AC_MSG_RESULT([$LIBICONV])
65 dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
67 CPPFLAGS="$am_save_CPPFLAGS"
78 if test "$am_cv_func_iconv" = yes; then
79 AC_MSG_CHECKING([for iconv declaration])
80 AC_CACHE_VAL(am_cv_proto_iconv, [
88 #if defined(__STDC__) || defined(__cplusplus)
89 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
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.])