1# iconv.m4 serial 21 2dnl Copyright (C) 2000-2002, 2007-2014, 2016-2019 Free Software Foundation, 3dnl Inc. 4dnl This file is free software; the Free Software Foundation 5dnl gives unlimited permission to copy and/or distribute it, 6dnl with or without modifications, as long as this notice is preserved. 7 8dnl From Bruno Haible. 9 10AC_DEFUN([AM_ICONV_LINKFLAGS_BODY], 11[ 12 dnl Prerequisites of AC_LIB_LINKFLAGS_BODY. 13 AC_REQUIRE([AC_LIB_PREPARE_PREFIX]) 14 AC_REQUIRE([AC_LIB_RPATH]) 15 16 dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV 17 dnl accordingly. 18 AC_LIB_LINKFLAGS_BODY([iconv]) 19]) 20 21AC_DEFUN([AM_ICONV_LINK], 22[ 23 dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and 24 dnl those with the standalone portable GNU libiconv installed). 25 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 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 $INCICONV to CPPFLAGS before performing the following checks, 32 dnl so that if libiconv is installed, it will be used (unless disabled 33 dnl via --without-libiconv-prefix). The first AC_LINK_IFELSE will 34 dnl then fail, the second AC_LINK_IFELSE will succeed. 35 am_save_CPPFLAGS="$CPPFLAGS" 36 AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV]) 37 38 AC_CACHE_CHECK([for iconv], [am_cv_func_iconv], [ 39 am_cv_func_iconv="no, consider installing GNU libiconv" 40 am_cv_lib_iconv=no 41 AC_LINK_IFELSE( 42 [AC_LANG_PROGRAM( 43 [[ 44#include <stdlib.h> 45#include <iconv.h> 46 ]], 47 [[iconv_t cd = iconv_open("",""); 48 iconv(cd,NULL,NULL,NULL,NULL); 49 iconv_close(cd);]])], 50 [am_cv_func_iconv=yes]) 51 if test "$am_cv_func_iconv" != yes; then 52 am_save_LIBS="$LIBS" 53 LIBS="$LIBS $LIBICONV" 54 AC_LINK_IFELSE( 55 [AC_LANG_PROGRAM( 56 [[ 57#include <stdlib.h> 58#include <iconv.h> 59 ]], 60 [[iconv_t cd = iconv_open("",""); 61 iconv(cd,NULL,NULL,NULL,NULL); 62 iconv_close(cd);]])], 63 [am_cv_lib_iconv=yes] 64 [am_cv_func_iconv=yes]) 65 LIBS="$am_save_LIBS" 66 fi 67 ]) 68 if test "$am_cv_func_iconv" = yes; then 69 AC_CACHE_CHECK([for working iconv], [am_cv_func_iconv_works], [ 70 dnl This tests against bugs in AIX 5.1, AIX 6.1..7.1, HP-UX 11.11, 71 dnl Solaris 10. 72 am_save_LIBS="$LIBS" 73 if test $am_cv_lib_iconv = yes; then 74 LIBS="$LIBS $LIBICONV" 75 fi 76 am_cv_func_iconv_works=no 77 for ac_iconv_const in '' 'const'; do 78 AC_RUN_IFELSE( 79 [AC_LANG_PROGRAM( 80 [[ 81#include <iconv.h> 82#include <string.h> 83 84#ifndef ICONV_CONST 85# define ICONV_CONST $ac_iconv_const 86#endif 87 ]], 88 [[int result = 0; 89 /* Test against AIX 5.1 bug: Failures are not distinguishable from successful 90 returns. */ 91 { 92 iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8"); 93 if (cd_utf8_to_88591 != (iconv_t)(-1)) 94 { 95 static ICONV_CONST char input[] = "\342\202\254"; /* EURO SIGN */ 96 char buf[10]; 97 ICONV_CONST char *inptr = input; 98 size_t inbytesleft = strlen (input); 99 char *outptr = buf; 100 size_t outbytesleft = sizeof (buf); 101 size_t res = iconv (cd_utf8_to_88591, 102 &inptr, &inbytesleft, 103 &outptr, &outbytesleft); 104 if (res == 0) 105 result |= 1; 106 iconv_close (cd_utf8_to_88591); 107 } 108 } 109 /* Test against Solaris 10 bug: Failures are not distinguishable from 110 successful returns. */ 111 { 112 iconv_t cd_ascii_to_88591 = iconv_open ("ISO8859-1", "646"); 113 if (cd_ascii_to_88591 != (iconv_t)(-1)) 114 { 115 static ICONV_CONST char input[] = "\263"; 116 char buf[10]; 117 ICONV_CONST char *inptr = input; 118 size_t inbytesleft = strlen (input); 119 char *outptr = buf; 120 size_t outbytesleft = sizeof (buf); 121 size_t res = iconv (cd_ascii_to_88591, 122 &inptr, &inbytesleft, 123 &outptr, &outbytesleft); 124 if (res == 0) 125 result |= 2; 126 iconv_close (cd_ascii_to_88591); 127 } 128 } 129 /* Test against AIX 6.1..7.1 bug: Buffer overrun. */ 130 { 131 iconv_t cd_88591_to_utf8 = iconv_open ("UTF-8", "ISO-8859-1"); 132 if (cd_88591_to_utf8 != (iconv_t)(-1)) 133 { 134 static ICONV_CONST char input[] = "\304"; 135 static char buf[2] = { (char)0xDE, (char)0xAD }; 136 ICONV_CONST char *inptr = input; 137 size_t inbytesleft = 1; 138 char *outptr = buf; 139 size_t outbytesleft = 1; 140 size_t res = iconv (cd_88591_to_utf8, 141 &inptr, &inbytesleft, 142 &outptr, &outbytesleft); 143 if (res != (size_t)(-1) || outptr - buf > 1 || buf[1] != (char)0xAD) 144 result |= 4; 145 iconv_close (cd_88591_to_utf8); 146 } 147 } 148#if 0 /* This bug could be worked around by the caller. */ 149 /* Test against HP-UX 11.11 bug: Positive return value instead of 0. */ 150 { 151 iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591"); 152 if (cd_88591_to_utf8 != (iconv_t)(-1)) 153 { 154 static ICONV_CONST char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337"; 155 char buf[50]; 156 ICONV_CONST char *inptr = input; 157 size_t inbytesleft = strlen (input); 158 char *outptr = buf; 159 size_t outbytesleft = sizeof (buf); 160 size_t res = iconv (cd_88591_to_utf8, 161 &inptr, &inbytesleft, 162 &outptr, &outbytesleft); 163 if ((int)res > 0) 164 result |= 8; 165 iconv_close (cd_88591_to_utf8); 166 } 167 } 168#endif 169 /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is 170 provided. */ 171 { 172 /* Try standardized names. */ 173 iconv_t cd1 = iconv_open ("UTF-8", "EUC-JP"); 174 /* Try IRIX, OSF/1 names. */ 175 iconv_t cd2 = iconv_open ("UTF-8", "eucJP"); 176 /* Try AIX names. */ 177 iconv_t cd3 = iconv_open ("UTF-8", "IBM-eucJP"); 178 /* Try HP-UX names. */ 179 iconv_t cd4 = iconv_open ("utf8", "eucJP"); 180 if (cd1 == (iconv_t)(-1) && cd2 == (iconv_t)(-1) 181 && cd3 == (iconv_t)(-1) && cd4 == (iconv_t)(-1)) 182 result |= 16; 183 if (cd1 != (iconv_t)(-1)) 184 iconv_close (cd1); 185 if (cd2 != (iconv_t)(-1)) 186 iconv_close (cd2); 187 if (cd3 != (iconv_t)(-1)) 188 iconv_close (cd3); 189 if (cd4 != (iconv_t)(-1)) 190 iconv_close (cd4); 191 } 192 return result; 193]])], 194 [am_cv_func_iconv_works=yes], , 195 [case "$host_os" in 196 aix* | hpux*) am_cv_func_iconv_works="guessing no" ;; 197 *) am_cv_func_iconv_works="guessing yes" ;; 198 esac]) 199 test "$am_cv_func_iconv_works" = no || break 200 done 201 LIBS="$am_save_LIBS" 202 ]) 203 case "$am_cv_func_iconv_works" in 204 *no) am_func_iconv=no am_cv_lib_iconv=no ;; 205 *) am_func_iconv=yes ;; 206 esac 207 else 208 am_func_iconv=no am_cv_lib_iconv=no 209 fi 210 if test "$am_func_iconv" = yes; then 211 AC_DEFINE([HAVE_ICONV], [1], 212 [Define if you have the iconv() function and it works.]) 213 fi 214 if test "$am_cv_lib_iconv" = yes; then 215 AC_MSG_CHECKING([how to link with libiconv]) 216 AC_MSG_RESULT([$LIBICONV]) 217 else 218 dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV 219 dnl either. 220 CPPFLAGS="$am_save_CPPFLAGS" 221 LIBICONV= 222 LTLIBICONV= 223 fi 224 AC_SUBST([LIBICONV]) 225 AC_SUBST([LTLIBICONV]) 226]) 227 228dnl Define AM_ICONV using AC_DEFUN_ONCE for Autoconf >= 2.64, in order to 229dnl avoid warnings like 230dnl "warning: AC_REQUIRE: `AM_ICONV' was expanded before it was required". 231dnl This is tricky because of the way 'aclocal' is implemented: 232dnl - It requires defining an auxiliary macro whose name ends in AC_DEFUN. 233dnl Otherwise aclocal's initial scan pass would miss the macro definition. 234dnl - It requires a line break inside the AC_DEFUN_ONCE and AC_DEFUN expansions. 235dnl Otherwise aclocal would emit many "Use of uninitialized value $1" 236dnl warnings. 237m4_define([gl_iconv_AC_DEFUN], 238 m4_version_prereq([2.64], 239 [[AC_DEFUN_ONCE( 240 [$1], [$2])]], 241 [m4_ifdef([gl_00GNULIB], 242 [[AC_DEFUN_ONCE( 243 [$1], [$2])]], 244 [[AC_DEFUN( 245 [$1], [$2])]])])) 246gl_iconv_AC_DEFUN([AM_ICONV], 247[ 248 AM_ICONV_LINK 249 if test "$am_cv_func_iconv" = yes; then 250 AC_MSG_CHECKING([for iconv declaration]) 251 AC_CACHE_VAL([am_cv_proto_iconv], [ 252 AC_COMPILE_IFELSE( 253 [AC_LANG_PROGRAM( 254 [[ 255#include <stdlib.h> 256#include <iconv.h> 257extern 258#ifdef __cplusplus 259"C" 260#endif 261#if defined(__STDC__) || defined(_MSC_VER) || defined(__cplusplus) 262size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft); 263#else 264size_t iconv(); 265#endif 266 ]], 267 [[]])], 268 [am_cv_proto_iconv_arg1=""], 269 [am_cv_proto_iconv_arg1="const"]) 270 am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"]) 271 am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'` 272 AC_MSG_RESULT([$am_cv_proto_iconv]) 273 else 274 dnl When compiling GNU libiconv on a system that does not have iconv yet, 275 dnl pick the POSIX compliant declaration without 'const'. 276 am_cv_proto_iconv_arg1="" 277 fi 278 AC_DEFINE_UNQUOTED([ICONV_CONST], [$am_cv_proto_iconv_arg1], 279 [Define as const if the declaration of iconv() needs const.]) 280 dnl Also substitute ICONV_CONST in the gnulib generated <iconv.h>. 281 m4_ifdef([gl_ICONV_H_DEFAULTS], 282 [AC_REQUIRE([gl_ICONV_H_DEFAULTS]) 283 if test -n "$am_cv_proto_iconv_arg1"; then 284 ICONV_CONST="const" 285 fi 286 ]) 287]) 288