iconv.m4 (9274B)
1 # iconv.m4 serial 19 (gettext-0.18.2) 2 dnl Copyright (C) 2000-2002, 2007-2014, 2016 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 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 25 26 dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV 27 dnl accordingly. 28 AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY]) 29 30 dnl Add $INCICONV to CPPFLAGS before performing the following checks, 31 dnl because if the user has installed libiconv and not disabled its use 32 dnl via --without-libiconv-prefix, he wants to use it. The first 33 dnl AC_LINK_IFELSE will then fail, the second AC_LINK_IFELSE will succeed. 34 am_save_CPPFLAGS="$CPPFLAGS" 35 AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV]) 36 37 AC_CACHE_CHECK([for iconv], [am_cv_func_iconv], [ 38 am_cv_func_iconv="no, consider installing GNU libiconv" 39 am_cv_lib_iconv=no 40 AC_LINK_IFELSE( 41 [AC_LANG_PROGRAM( 42 [[ 43 #include <stdlib.h> 44 #include <iconv.h> 45 ]], 46 [[iconv_t cd = iconv_open("",""); 47 iconv(cd,NULL,NULL,NULL,NULL); 48 iconv_close(cd);]])], 49 [am_cv_func_iconv=yes]) 50 if test "$am_cv_func_iconv" != yes; then 51 am_save_LIBS="$LIBS" 52 LIBS="$LIBS $LIBICONV" 53 AC_LINK_IFELSE( 54 [AC_LANG_PROGRAM( 55 [[ 56 #include <stdlib.h> 57 #include <iconv.h> 58 ]], 59 [[iconv_t cd = iconv_open("",""); 60 iconv(cd,NULL,NULL,NULL,NULL); 61 iconv_close(cd);]])], 62 [am_cv_lib_iconv=yes] 63 [am_cv_func_iconv=yes]) 64 LIBS="$am_save_LIBS" 65 fi 66 ]) 67 if test "$am_cv_func_iconv" = yes; then 68 AC_CACHE_CHECK([for working iconv], [am_cv_func_iconv_works], [ 69 dnl This tests against bugs in AIX 5.1, AIX 6.1..7.1, HP-UX 11.11, 70 dnl Solaris 10. 71 am_save_LIBS="$LIBS" 72 if test $am_cv_lib_iconv = yes; then 73 LIBS="$LIBS $LIBICONV" 74 fi 75 am_cv_func_iconv_works=no 76 for ac_iconv_const in '' 'const'; do 77 AC_RUN_IFELSE( 78 [AC_LANG_PROGRAM( 79 [[ 80 #include <iconv.h> 81 #include <string.h> 82 83 #ifndef ICONV_CONST 84 # define ICONV_CONST $ac_iconv_const 85 #endif 86 ]], 87 [[int result = 0; 88 /* Test against AIX 5.1 bug: Failures are not distinguishable from successful 89 returns. */ 90 { 91 iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8"); 92 if (cd_utf8_to_88591 != (iconv_t)(-1)) 93 { 94 static ICONV_CONST char input[] = "\342\202\254"; /* EURO SIGN */ 95 char buf[10]; 96 ICONV_CONST char *inptr = input; 97 size_t inbytesleft = strlen (input); 98 char *outptr = buf; 99 size_t outbytesleft = sizeof (buf); 100 size_t res = iconv (cd_utf8_to_88591, 101 &inptr, &inbytesleft, 102 &outptr, &outbytesleft); 103 if (res == 0) 104 result |= 1; 105 iconv_close (cd_utf8_to_88591); 106 } 107 } 108 /* Test against Solaris 10 bug: Failures are not distinguishable from 109 successful returns. */ 110 { 111 iconv_t cd_ascii_to_88591 = iconv_open ("ISO8859-1", "646"); 112 if (cd_ascii_to_88591 != (iconv_t)(-1)) 113 { 114 static ICONV_CONST char input[] = "\263"; 115 char buf[10]; 116 ICONV_CONST char *inptr = input; 117 size_t inbytesleft = strlen (input); 118 char *outptr = buf; 119 size_t outbytesleft = sizeof (buf); 120 size_t res = iconv (cd_ascii_to_88591, 121 &inptr, &inbytesleft, 122 &outptr, &outbytesleft); 123 if (res == 0) 124 result |= 2; 125 iconv_close (cd_ascii_to_88591); 126 } 127 } 128 /* Test against AIX 6.1..7.1 bug: Buffer overrun. */ 129 { 130 iconv_t cd_88591_to_utf8 = iconv_open ("UTF-8", "ISO-8859-1"); 131 if (cd_88591_to_utf8 != (iconv_t)(-1)) 132 { 133 static ICONV_CONST char input[] = "\304"; 134 static char buf[2] = { (char)0xDE, (char)0xAD }; 135 ICONV_CONST char *inptr = input; 136 size_t inbytesleft = 1; 137 char *outptr = buf; 138 size_t outbytesleft = 1; 139 size_t res = iconv (cd_88591_to_utf8, 140 &inptr, &inbytesleft, 141 &outptr, &outbytesleft); 142 if (res != (size_t)(-1) || outptr - buf > 1 || buf[1] != (char)0xAD) 143 result |= 4; 144 iconv_close (cd_88591_to_utf8); 145 } 146 } 147 #if 0 /* This bug could be worked around by the caller. */ 148 /* Test against HP-UX 11.11 bug: Positive return value instead of 0. */ 149 { 150 iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591"); 151 if (cd_88591_to_utf8 != (iconv_t)(-1)) 152 { 153 static ICONV_CONST char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337"; 154 char buf[50]; 155 ICONV_CONST char *inptr = input; 156 size_t inbytesleft = strlen (input); 157 char *outptr = buf; 158 size_t outbytesleft = sizeof (buf); 159 size_t res = iconv (cd_88591_to_utf8, 160 &inptr, &inbytesleft, 161 &outptr, &outbytesleft); 162 if ((int)res > 0) 163 result |= 8; 164 iconv_close (cd_88591_to_utf8); 165 } 166 } 167 #endif 168 /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is 169 provided. */ 170 if (/* Try standardized names. */ 171 iconv_open ("UTF-8", "EUC-JP") == (iconv_t)(-1) 172 /* Try IRIX, OSF/1 names. */ 173 && iconv_open ("UTF-8", "eucJP") == (iconv_t)(-1) 174 /* Try AIX names. */ 175 && iconv_open ("UTF-8", "IBM-eucJP") == (iconv_t)(-1) 176 /* Try HP-UX names. */ 177 && iconv_open ("utf8", "eucJP") == (iconv_t)(-1)) 178 result |= 16; 179 return result; 180 ]])], 181 [am_cv_func_iconv_works=yes], , 182 [case "$host_os" in 183 aix* | hpux*) am_cv_func_iconv_works="guessing no" ;; 184 *) am_cv_func_iconv_works="guessing yes" ;; 185 esac]) 186 test "$am_cv_func_iconv_works" = no || break 187 done 188 LIBS="$am_save_LIBS" 189 ]) 190 case "$am_cv_func_iconv_works" in 191 *no) am_func_iconv=no am_cv_lib_iconv=no ;; 192 *) am_func_iconv=yes ;; 193 esac 194 else 195 am_func_iconv=no am_cv_lib_iconv=no 196 fi 197 if test "$am_func_iconv" = yes; then 198 AC_DEFINE([HAVE_ICONV], [1], 199 [Define if you have the iconv() function and it works.]) 200 fi 201 if test "$am_cv_lib_iconv" = yes; then 202 AC_MSG_CHECKING([how to link with libiconv]) 203 AC_MSG_RESULT([$LIBICONV]) 204 else 205 dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV 206 dnl either. 207 CPPFLAGS="$am_save_CPPFLAGS" 208 LIBICONV= 209 LTLIBICONV= 210 fi 211 AC_SUBST([LIBICONV]) 212 AC_SUBST([LTLIBICONV]) 213 ]) 214 215 dnl Define AM_ICONV using AC_DEFUN_ONCE for Autoconf >= 2.64, in order to 216 dnl avoid warnings like 217 dnl "warning: AC_REQUIRE: `AM_ICONV' was expanded before it was required". 218 dnl This is tricky because of the way 'aclocal' is implemented: 219 dnl - It requires defining an auxiliary macro whose name ends in AC_DEFUN. 220 dnl Otherwise aclocal's initial scan pass would miss the macro definition. 221 dnl - It requires a line break inside the AC_DEFUN_ONCE and AC_DEFUN expansions. 222 dnl Otherwise aclocal would emit many "Use of uninitialized value $1" 223 dnl warnings. 224 m4_define([gl_iconv_AC_DEFUN], 225 m4_version_prereq([2.64], 226 [[AC_DEFUN_ONCE( 227 [$1], [$2])]], 228 [m4_ifdef([gl_00GNULIB], 229 [[AC_DEFUN_ONCE( 230 [$1], [$2])]], 231 [[AC_DEFUN( 232 [$1], [$2])]])])) 233 gl_iconv_AC_DEFUN([AM_ICONV], 234 [ 235 AM_ICONV_LINK 236 if test "$am_cv_func_iconv" = yes; then 237 AC_MSG_CHECKING([for iconv declaration]) 238 AC_CACHE_VAL([am_cv_proto_iconv], [ 239 AC_COMPILE_IFELSE( 240 [AC_LANG_PROGRAM( 241 [[ 242 #include <stdlib.h> 243 #include <iconv.h> 244 extern 245 #ifdef __cplusplus 246 "C" 247 #endif 248 #if defined(__STDC__) || defined(_MSC_VER) || defined(__cplusplus) 249 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft); 250 #else 251 size_t iconv(); 252 #endif 253 ]], 254 [[]])], 255 [am_cv_proto_iconv_arg1=""], 256 [am_cv_proto_iconv_arg1="const"]) 257 am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"]) 258 am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'` 259 AC_MSG_RESULT([ 260 $am_cv_proto_iconv]) 261 AC_DEFINE_UNQUOTED([ICONV_CONST], [$am_cv_proto_iconv_arg1], 262 [Define as const if the declaration of iconv() needs const.]) 263 dnl Also substitute ICONV_CONST in the gnulib generated <iconv.h>. 264 m4_ifdef([gl_ICONV_H_DEFAULTS], 265 [AC_REQUIRE([gl_ICONV_H_DEFAULTS]) 266 if test -n "$am_cv_proto_iconv_arg1"; then 267 ICONV_CONST="const" 268 fi 269 ]) 270 fi 271 ])