| 1 | # iconv.m4 serial AM3 (gettext-0.11)
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| 2 | dnl Copyright (C) 2000-2002 Free Software Foundation, Inc.
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| 3 | dnl This file is free software, distributed under the terms of the GNU
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| 4 | dnl General Public License. As a special exception to the GNU General
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| 5 | dnl Public License, this file may be distributed as part of a program
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| 6 | dnl that contains a configuration script generated by Autoconf, under
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| 7 | dnl the same distribution terms as the rest of that program.
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| 8 |
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| 9 | dnl From Bruno Haible.
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| 10 |
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| 11 | AC_DEFUN([AM_ICONV_LINK],
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| 12 | [
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| 13 | dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
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| 14 | dnl those with the standalone portable GNU libiconv installed).
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| 15 |
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| 16 | dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
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| 17 | AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
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| 18 | AC_REQUIRE([AC_LIB_RPATH])
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| 19 |
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| 20 | dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
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| 21 | dnl accordingly.
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| 22 | AC_LIB_LINKFLAGS_BODY([iconv])
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| 23 |
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| 24 | dnl Add $INCICONV to CPPFLAGS before performing the following checks,
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| 25 | dnl because if the user has installed libiconv and not disabled its use
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| 26 | dnl via --without-libiconv-prefix, he wants to use it. The first
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| 27 | dnl AC_TRY_LINK will then fail, the second AC_TRY_LINK will succeed.
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| 28 | am_save_CPPFLAGS="$CPPFLAGS"
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| 29 | AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])
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| 30 |
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| 31 | AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [
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| 32 | am_cv_func_iconv="no, consider installing GNU libiconv"
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| 33 | am_cv_lib_iconv=no
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| 34 | AC_TRY_LINK([#include <stdlib.h>
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| 35 | #include <iconv.h>],
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| 36 | [iconv_t cd = iconv_open("","");
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| 37 | iconv(cd,NULL,NULL,NULL,NULL);
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| 38 | iconv_close(cd);],
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| 39 | am_cv_func_iconv=yes)
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| 40 | if test "$am_cv_func_iconv" != yes; then
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| 41 | am_save_LIBS="$LIBS"
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| 42 | LIBS="$LIBS $LIBICONV"
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| 43 | AC_TRY_LINK([#include <stdlib.h>
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| 44 | #include <iconv.h>],
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| 45 | [iconv_t cd = iconv_open("","");
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| 46 | iconv(cd,NULL,NULL,NULL,NULL);
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| 47 | iconv_close(cd);],
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| 48 | am_cv_lib_iconv=yes
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| 49 | am_cv_func_iconv=yes)
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| 50 | LIBS="$am_save_LIBS"
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| 51 | fi
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| 52 | ])
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| 53 | if test "$am_cv_func_iconv" = yes; then
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| 54 | AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
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| 55 | fi
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| 56 | if test "$am_cv_lib_iconv" = yes; then
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| 57 | AC_MSG_CHECKING([how to link with libiconv])
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| 58 | AC_MSG_RESULT([$LIBICONV])
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| 59 | else
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| 60 | dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
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| 61 | dnl either.
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| 62 | CPPFLAGS="$am_save_CPPFLAGS"
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| 63 | LIBICONV=
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| 64 | LTLIBICONV=
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| 65 | fi
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| 66 | AC_SUBST(LIBICONV)
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| 67 | AC_SUBST(LTLIBICONV)
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| 68 | ])
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| 69 |
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| 70 | AC_DEFUN([AM_ICONV],
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| 71 | [
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| 72 | AC_REQUIRE([AM_ICONV_LINK])
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| 73 | if test "$am_cv_func_iconv" = yes; then
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| 74 | AC_MSG_CHECKING([for iconv declaration])
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| 75 | AC_CACHE_VAL(am_cv_proto_iconv, [
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| 76 | AC_TRY_COMPILE([
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| 77 | #include <stdlib.h>
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| 78 | #include <iconv.h>
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| 79 | extern
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| 80 | #ifdef __cplusplus
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| 81 | "C"
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| 82 | #endif
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| 83 | #if defined(__STDC__) || defined(__cplusplus)
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| 84 | size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
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| 85 | #else
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| 86 | size_t iconv();
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| 87 | #endif
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| 88 | ], [], am_cv_proto_iconv_arg1="", am_cv_proto_iconv_arg1="const")
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| 89 | am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
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| 90 | am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
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| 91 | AC_MSG_RESULT([$]{ac_t:-
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| 92 | }[$]am_cv_proto_iconv)
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| 93 | AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1,
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| 94 | [Define as const if the declaration of iconv() needs const.])
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| 95 | fi
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| 96 | ])
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