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