# iconv.m4 serial AM4 (gettext-0.11.3)

dnl Copyright (C) 2000-2002 Free Software Foundation, Inc.

dnl This file is free software; the Free Software Foundation

dnl gives unlimited permission to copy and/or distribute it,

dnl with or without modifications, as long as this notice is preserved.

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

])