iconv.m4 revision 1.6
1# iconv.m4 serial AM4 (gettext-0.11.3) 2dnl Copyright (C) 2000-2002 Free Software Foundation, Inc. 3dnl This file is free software, distributed under the terms of the GNU 4dnl General Public License. As a special exception to the GNU General 5dnl Public License, this file may be distributed as part of a program 6dnl that contains a configuration script generated by Autoconf, under 7dnl the same distribution terms as the rest of that program. 8 9dnl From Bruno Haible. 10dnl with modifications to support building with in-tree libiconv 11 12AC_DEFUN([AM_ICONV_LINKFLAGS_BODY], 13[ 14 dnl Prerequisites of AC_LIB_LINKFLAGS_BODY. 15 AC_REQUIRE([AC_LIB_PREPARE_PREFIX]) 16 AC_REQUIRE([AC_LIB_RPATH]) 17 18 dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV 19 dnl accordingly. 20 AC_LIB_LINKFLAGS_BODY([iconv]) 21]) 22 23AC_DEFUN([AM_ICONV_LINK], 24[ 25 dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and 26 dnl those with the standalone portable GNU libiconv installed). 27 28 dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV 29 dnl accordingly. 30 AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY]) 31 32 AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [ 33 am_cv_func_iconv="no, consider installing GNU libiconv" 34 am_cv_lib_iconv=no 35 dnl Add $INCICONV to CPPFLAGS before performing the first check, 36 dnl because if the user has installed libiconv and not disabled its use 37 dnl via --without-libiconv-prefix, he wants to use it. This first 38 dnl AC_TRY_LINK will then fail, the second AC_TRY_LINK will succeed. 39 am_save_CPPFLAGS="$CPPFLAGS" 40 CPPFLAGS="$CPPFLAGS $INCICONV" 41 AC_TRY_LINK([#include <stdlib.h> 42#include <iconv.h>], 43 [iconv_t cd = iconv_open("",""); 44 iconv(cd,NULL,NULL,NULL,NULL); 45 iconv_close(cd);], 46 am_cv_func_iconv=yes) 47 CPPFLAGS="$am_save_CPPFLAGS" 48 49 if test "$am_cv_func_iconv" != yes && test -d ../libiconv; then 50 for _libs in .libs _libs; do 51 am_save_CPPFLAGS="$CPPFLAGS" 52 am_save_LIBS="$LIBS" 53 CPPFLAGS="$CPPFLAGS -I../libiconv/include" 54 LIBS="$LIBS ../libiconv/lib/$_libs/libiconv.a" 55 AC_TRY_LINK([#include <stdlib.h> 56#include <iconv.h>], 57 [iconv_t cd = iconv_open("",""); 58 iconv(cd,NULL,NULL,NULL,NULL); 59 iconv_close(cd);], 60 INCICONV="-I../libiconv/include" 61 LIBICONV='${top_builddir}'/../libiconv/lib/$_libs/libiconv.a 62 LTLIBICONV='${top_builddir}'/../libiconv/lib/libiconv.la 63 am_cv_lib_iconv=yes 64 am_cv_func_iconv=yes) 65 CPPFLAGS="$am_save_CPPFLAGS" 66 LIBS="$am_save_LIBS" 67 if test "$am_cv_func_iconv" = "yes"; then 68 break 69 fi 70 done 71 fi 72 73 if test "$am_cv_func_iconv" != yes; then 74 am_save_CPPFLAGS="$CPPFLAGS" 75 am_save_LIBS="$LIBS" 76 CPPFLAGS="$LIBS $INCICONV" 77 LIBS="$LIBS $LIBICONV" 78 AC_TRY_LINK([#include <stdlib.h> 79#include <iconv.h>], 80 [iconv_t cd = iconv_open("",""); 81 iconv(cd,NULL,NULL,NULL,NULL); 82 iconv_close(cd);], 83 am_cv_lib_iconv=yes 84 am_cv_func_iconv=yes) 85 CPPFLAGS="$am_save_CPPFLAGS" 86 LIBS="$am_save_LIBS" 87 fi 88 ]) 89 if test "$am_cv_func_iconv" = yes; then 90 AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.]) 91 fi 92 if test "$am_cv_lib_iconv" = yes; then 93 AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV]) 94 AC_MSG_CHECKING([how to link with libiconv]) 95 AC_MSG_RESULT([$LIBICONV]) 96 else 97 LIBICONV= 98 LTLIBICONV= 99 fi 100 AC_SUBST(LIBICONV) 101 AC_SUBST(LTLIBICONV) 102]) 103 104AC_DEFUN([AM_ICONV], 105[ 106 AM_ICONV_LINK 107 if test "$am_cv_func_iconv" = yes; then 108 AC_MSG_CHECKING([for iconv declaration]) 109 AC_CACHE_VAL(am_cv_proto_iconv, [ 110 AC_TRY_COMPILE([ 111#include <stdlib.h> 112#include <iconv.h> 113extern 114#ifdef __cplusplus 115"C" 116#endif 117#if defined(__STDC__) || defined(__cplusplus) 118size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft); 119#else 120size_t iconv(); 121#endif 122], [], am_cv_proto_iconv_arg1="", am_cv_proto_iconv_arg1="const") 123 am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"]) 124 am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'` 125 AC_MSG_RESULT([$]{ac_t:- 126 }[$]am_cv_proto_iconv) 127 AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1, 128 [Define as const if the declaration of iconv() needs const.]) 129 fi 130]) 131