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annotate m4/iconv.m4 @ 5585:adff74659d81

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Use an all-permissive copyright notice, recommended by RMS.
author Bruno Haible <bruno@clisp.org>
date Tue, 18 Jan 2005 13:07:56 +0000
parents 3358eb550c86
children 5cba81876885
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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7c1a6b73f48e An autoconf macro for its associated module.
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1 # iconv.m4 serial AM4 (gettext-0.11.3)
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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; the Free Software Foundation
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4 dnl gives unlimited permission to copy and/or distribute it,
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5 dnl with or without modifications, as long as this notice is preserved.
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6
7c1a6b73f48e An autoconf macro for its associated module.
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7 dnl From Bruno Haible.
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8
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9 AC_DEFUN([AM_ICONV_LINKFLAGS_BODY],
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10 [
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11 dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
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12 AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
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13 AC_REQUIRE([AC_LIB_RPATH])
7c1a6b73f48e An autoconf macro for its associated module.
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14
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15 dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
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16 dnl accordingly.
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17 AC_LIB_LINKFLAGS_BODY([iconv])
7c1a6b73f48e An autoconf macro for its associated module.
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18 ])
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19
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20 AC_DEFUN([AM_ICONV_LINK],
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21 [
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22 dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
7c1a6b73f48e An autoconf macro for its associated module.
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23 dnl those with the standalone portable GNU libiconv installed).
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24
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25 dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
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26 dnl accordingly.
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27 AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
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28
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29 dnl Add $INCICONV to CPPFLAGS before performing the following checks,
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30 dnl because if the user has installed libiconv and not disabled its use
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31 dnl via --without-libiconv-prefix, he wants to use it. The first
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32 dnl AC_TRY_LINK will then fail, the second AC_TRY_LINK will succeed.
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33 am_save_CPPFLAGS="$CPPFLAGS"
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34 AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])
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35
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36 AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [
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37 am_cv_func_iconv="no, consider installing GNU libiconv"
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38 am_cv_lib_iconv=no
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39 AC_TRY_LINK([#include <stdlib.h>
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40 #include <iconv.h>],
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41 [iconv_t cd = iconv_open("","");
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42 iconv(cd,NULL,NULL,NULL,NULL);
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43 iconv_close(cd);],
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44 am_cv_func_iconv=yes)
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45 if test "$am_cv_func_iconv" != yes; then
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46 am_save_LIBS="$LIBS"
7c1a6b73f48e An autoconf macro for its associated module.
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47 LIBS="$LIBS $LIBICONV"
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48 AC_TRY_LINK([#include <stdlib.h>
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49 #include <iconv.h>],
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50 [iconv_t cd = iconv_open("","");
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51 iconv(cd,NULL,NULL,NULL,NULL);
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52 iconv_close(cd);],
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53 am_cv_lib_iconv=yes
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54 am_cv_func_iconv=yes)
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55 LIBS="$am_save_LIBS"
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56 fi
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57 ])
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58 if test "$am_cv_func_iconv" = yes; then
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59 AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
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60 fi
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61 if test "$am_cv_lib_iconv" = yes; then
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62 AC_MSG_CHECKING([how to link with libiconv])
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63 AC_MSG_RESULT([$LIBICONV])
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64 else
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65 dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
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66 dnl either.
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67 CPPFLAGS="$am_save_CPPFLAGS"
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68 LIBICONV=
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69 LTLIBICONV=
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70 fi
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71 AC_SUBST(LIBICONV)
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72 AC_SUBST(LTLIBICONV)
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73 ])
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74
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75 AC_DEFUN([AM_ICONV],
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76 [
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77 AM_ICONV_LINK
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78 if test "$am_cv_func_iconv" = yes; then
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79 AC_MSG_CHECKING([for iconv declaration])
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80 AC_CACHE_VAL(am_cv_proto_iconv, [
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81 AC_TRY_COMPILE([
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82 #include <stdlib.h>
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83 #include <iconv.h>
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84 extern
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85 #ifdef __cplusplus
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86 "C"
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87 #endif
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88 #if defined(__STDC__) || defined(__cplusplus)
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89 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
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90 #else
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91 size_t iconv();
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92 #endif
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93 ], [], am_cv_proto_iconv_arg1="", am_cv_proto_iconv_arg1="const")
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94 am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
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95 am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
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96 AC_MSG_RESULT([$]{ac_t:-
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97 }[$]am_cv_proto_iconv)
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98 AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1,
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99 [Define as const if the declaration of iconv() needs const.])
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100 fi
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101 ])