1 # iconv.m4 serial AM4 (gettext-0.11.3) 2 dnl Copyright (C) 2000-2002 Free Software Foundation, Inc. 3 dnl This file is free software, distributed under the terms of the GNU 4 dnl General Public License. As a special exception to the GNU General 5 dnl Public License, this file may be distributed as part of a program 6 dnl that contains a configuration script generated by Autoconf, under 7 dnl the same distribution terms as the rest of that program. 8 9 dnl From Bruno Haible. 10 11 AC_DEFUN([AM_ICONV_LINKFLAGS_BODY], 12 [ 13 dnl Prerequisites of AC_LIB_LINKFLAGS_BODY. 14 AC_REQUIRE([AC_LIB_PREPARE_PREFIX]) 15 AC_REQUIRE([AC_LIB_RPATH]) 16 17 dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV 18 dnl accordingly. 19 AC_LIB_LINKFLAGS_BODY([iconv]) 20 ]) 21 22 AC_DEFUN([AM_ICONV_LINK], 23 [ 24 dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and 25 dnl those with the standalone portable GNU libiconv installed). 26 27 dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV 28 dnl accordingly. 29 AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY]) 30 31 dnl Add $INCICONV to CPPFLAGS before performing the following checks, 32 dnl because if the user has installed libiconv and not disabled its use 33 dnl via --without-libiconv-prefix, he wants to use it. The first 34 dnl AC_TRY_LINK will then fail, the second AC_TRY_LINK will succeed. 35 am_save_CPPFLAGS="$CPPFLAGS" 36 AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV]) 37 38 AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [ 39 am_cv_func_iconv="no, consider installing GNU libiconv" 40 am_cv_lib_iconv=no 41 AC_TRY_LINK([#include <stdlib.h> 42 #include <iconv.h>], 43 [iconv_t cd = iconv_open("",""); 44 iconv(cd,NULL,NULL,NULL,NULL); 45 iconv_close(cd);], 46 am_cv_func_iconv=yes) 47 if test "$am_cv_func_iconv" != yes; then 48 am_save_LIBS="$LIBS" 49 LIBS="$LIBS $LIBICONV" 50 AC_TRY_LINK([#include <stdlib.h> 51 #include <iconv.h>], 52 [iconv_t cd = iconv_open("",""); 53 iconv(cd,NULL,NULL,NULL,NULL); 54 iconv_close(cd);], 55 am_cv_lib_iconv=yes 56 am_cv_func_iconv=yes) 57 LIBS="$am_save_LIBS" 58 fi 59 ]) 60 if test "$am_cv_func_iconv" = yes; then 61 AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.]) 62 fi 63 if test "$am_cv_lib_iconv" = yes; then 64 AC_MSG_CHECKING([how to link with libiconv]) 65 AC_MSG_RESULT([$LIBICONV]) 66 else 67 dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV 68 dnl either. 69 CPPFLAGS="$am_save_CPPFLAGS" 70 LIBICONV= 71 LTLIBICONV= 72 fi 73 AC_SUBST(LIBICONV) 74 AC_SUBST(LTLIBICONV) 75 ]) 76 77 AC_DEFUN([AM_ICONV], 78 [ 79 AM_ICONV_LINK 80 if test "$am_cv_func_iconv" = yes; then 81 AC_MSG_CHECKING([for iconv declaration]) 82 AC_CACHE_VAL(am_cv_proto_iconv, [ 83 AC_TRY_COMPILE([ 84 #include <stdlib.h> 85 #include <iconv.h> 86 extern 87 #ifdef __cplusplus 88 "C" 89 #endif 90 #if defined(__STDC__) || defined(__cplusplus) 91 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft); 92 #else 93 size_t iconv(); 94 #endif 95 ], [], am_cv_proto_iconv_arg1="", am_cv_proto_iconv_arg1="const") 96 am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"]) 97 am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'` 98 AC_MSG_RESULT([$]{ac_t:- 99 }[$]am_cv_proto_iconv) 100 AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1, 101 [Define as const if the declaration of iconv() needs const.]) 102 fi 103 ]) 104
