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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, 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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111
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10 dnl with modifications to support building with in-tree libiconv
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11
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12 AC_DEFUN([AM_ICONV_LINKFLAGS_BODY],
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13 [
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14 dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
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15 AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
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16 AC_REQUIRE([AC_LIB_RPATH])
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17
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18 dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
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19 dnl accordingly.
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20 AC_LIB_LINKFLAGS_BODY([iconv])
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21 ])
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22
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23 AC_DEFUN([AM_ICONV_LINK],
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24 [
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25 dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
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26 dnl those with the standalone portable GNU libiconv installed).
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27
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28 dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
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29 dnl accordingly.
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30 AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
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31
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32 AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [
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33 am_cv_func_iconv="no, consider installing GNU libiconv"
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34 am_cv_lib_iconv=no
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111
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35 dnl Add $INCICONV to CPPFLAGS before performing the first check,
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36 dnl because if the user has installed libiconv and not disabled its use
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37 dnl via --without-libiconv-prefix, he wants to use it. This first
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38 dnl AC_TRY_LINK will then fail, the second AC_TRY_LINK will succeed.
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39 am_save_CPPFLAGS="$CPPFLAGS"
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40 CPPFLAGS="$CPPFLAGS $INCICONV"
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41 AC_TRY_LINK([#include <stdlib.h>
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42 #include <iconv.h>],
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43 [iconv_t cd = iconv_open("","");
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44 iconv(cd,NULL,NULL,NULL,NULL);
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45 iconv_close(cd);],
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46 am_cv_func_iconv=yes)
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111
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47 CPPFLAGS="$am_save_CPPFLAGS"
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48
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49 if test "$am_cv_func_iconv" != yes && test -d ../libiconv; then
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50 for _libs in .libs _libs; do
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51 am_save_CPPFLAGS="$CPPFLAGS"
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52 am_save_LIBS="$LIBS"
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53 CPPFLAGS="$CPPFLAGS -I../libiconv/include"
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54 LIBS="$LIBS ../libiconv/lib/$_libs/libiconv.a"
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55 AC_TRY_LINK([#include <stdlib.h>
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56 #include <iconv.h>],
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57 [iconv_t cd = iconv_open("","");
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58 iconv(cd,NULL,NULL,NULL,NULL);
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59 iconv_close(cd);],
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60 INCICONV="-I../libiconv/include"
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61 LIBICONV='${top_builddir}'/../libiconv/lib/$_libs/libiconv.a
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62 LTLIBICONV='${top_builddir}'/../libiconv/lib/libiconv.la
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63 am_cv_lib_iconv=yes
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64 am_cv_func_iconv=yes)
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65 CPPFLAGS="$am_save_CPPFLAGS"
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66 LIBS="$am_save_LIBS"
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67 if test "$am_cv_func_iconv" = "yes"; then
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68 break
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69 fi
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70 done
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71 fi
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72
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73 if test "$am_cv_func_iconv" != yes; then
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74 am_save_CPPFLAGS="$CPPFLAGS"
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75 am_save_LIBS="$LIBS"
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76 CPPFLAGS="$CPPFLAGS $INCICONV"
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77 LIBS="$LIBS $LIBICONV"
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78 AC_TRY_LINK([#include <stdlib.h>
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79 #include <iconv.h>],
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80 [iconv_t cd = iconv_open("","");
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81 iconv(cd,NULL,NULL,NULL,NULL);
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82 iconv_close(cd);],
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83 am_cv_lib_iconv=yes
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84 am_cv_func_iconv=yes)
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85 CPPFLAGS="$am_save_CPPFLAGS"
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86 LIBS="$am_save_LIBS"
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87 fi
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88 ])
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89 if test "$am_cv_func_iconv" = yes; then
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90 AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
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91 fi
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92 if test "$am_cv_lib_iconv" = yes; then
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93 AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])
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94 AC_MSG_CHECKING([how to link with libiconv])
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95 AC_MSG_RESULT([$LIBICONV])
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96 else
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97 LIBICONV=
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98 LTLIBICONV=
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99 fi
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100 AC_SUBST(LIBICONV)
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101 AC_SUBST(LTLIBICONV)
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102 ])
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103
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104 AC_DEFUN([AM_ICONV],
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105 [
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106 AM_ICONV_LINK
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107 if test "$am_cv_func_iconv" = yes; then
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108 AC_MSG_CHECKING([for iconv declaration])
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109 AC_CACHE_VAL(am_cv_proto_iconv, [
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110 AC_TRY_COMPILE([
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111 #include <stdlib.h>
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112 #include <iconv.h>
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113 extern
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114 #ifdef __cplusplus
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115 "C"
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116 #endif
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117 #if defined(__STDC__) || defined(__cplusplus)
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118 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
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119 #else
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120 size_t iconv();
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121 #endif
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122 ], [], am_cv_proto_iconv_arg1="", am_cv_proto_iconv_arg1="const")
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123 am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
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124 am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
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125 AC_MSG_RESULT([$]{ac_t:-
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126 }[$]am_cv_proto_iconv)
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127 AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1,
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128 [Define as const if the declaration of iconv() needs const.])
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129 fi
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130 ])
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