# iconv.m4 serial AM4 (gettext-0.11.3)
dnl Copyright (C) 2000-2002 Free Software Foundation, Inc.
dnl This file is free software, distributed under the terms of the GNU
dnl General Public License.  As a special exception to the GNU General
dnl Public License, this file may be distributed as part of a program
dnl that contains a configuration script generated by Autoconf, under
dnl the same distribution terms as the rest of that program.

dnl From Bruno Haible.

AC_DEFUN([AM_ICONV_LINKFLAGS_BODY],
[
 dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
 AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
 AC_REQUIRE([AC_LIB_RPATH])

 dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
 dnl accordingly.
 AC_LIB_LINKFLAGS_BODY([iconv])
])

AC_DEFUN([AM_ICONV_LINK],
[
 dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
 dnl those with the standalone portable GNU libiconv installed).

 dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
 dnl accordingly.
 AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])

 dnl Add $INCICONV to CPPFLAGS before performing the following checks,
 dnl because if the user has installed libiconv and not disabled its use
 dnl via --without-libiconv-prefix, he wants to use it. The first
 dnl AC_TRY_LINK will then fail, the second AC_TRY_LINK will succeed.
 am_save_CPPFLAGS="$CPPFLAGS"
 AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])

 AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [
   am_cv_func_iconv="no, consider installing GNU libiconv"
   am_cv_lib_iconv=no
   AC_TRY_LINK([#include <stdlib.h>
#include <iconv.h>],
     [iconv_t cd = iconv_open("","");
      iconv(cd,NULL,NULL,NULL,NULL);
      iconv_close(cd);],
     am_cv_func_iconv=yes)
   if test "$am_cv_func_iconv" != yes; then
     am_save_LIBS="$LIBS"
     LIBS="$LIBS $LIBICONV"
     AC_TRY_LINK([#include <stdlib.h>
#include <iconv.h>],
       [iconv_t cd = iconv_open("","");
        iconv(cd,NULL,NULL,NULL,NULL);
        iconv_close(cd);],
       am_cv_lib_iconv=yes
       am_cv_func_iconv=yes)
     LIBS="$am_save_LIBS"
   fi
 ])
 if test "$am_cv_func_iconv" = yes; then
   AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
 fi
 if test "$am_cv_lib_iconv" = yes; then
   AC_MSG_CHECKING([how to link with libiconv])
   AC_MSG_RESULT([$LIBICONV])
 else
   dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
   dnl either.
   CPPFLAGS="$am_save_CPPFLAGS"
   LIBICONV=
   LTLIBICONV=
 fi
 AC_SUBST(LIBICONV)
 AC_SUBST(LTLIBICONV)
])

AC_DEFUN([AM_ICONV],
[
 AM_ICONV_LINK
 if test "$am_cv_func_iconv" = yes; then
   AC_MSG_CHECKING([for iconv declaration])
   AC_CACHE_VAL(am_cv_proto_iconv, [
     AC_TRY_COMPILE([
#include <stdlib.h>
#include <iconv.h>
extern
#ifdef __cplusplus
"C"
#endif
#if defined(__STDC__) || defined(__cplusplus)
size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
#else
size_t iconv();
#endif
], [], am_cv_proto_iconv_arg1="", am_cv_proto_iconv_arg1="const")
     am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
   am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
   AC_MSG_RESULT([$]{ac_t:-
        }[$]am_cv_proto_iconv)
   AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1,
     [Define as const if the declaration of iconv() needs const.])
 fi
])

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