Andrew Geissler | 82c905d | 2020-04-13 13:39:40 -0500 | [diff] [blame] | 1 | # iconv.m4 serial 21 |
Andrew Geissler | 4ed12e1 | 2020-06-05 18:00:41 -0500 | [diff] [blame] | 2 | dnl Copyright (C) 2000-2002, 2007-2014, 2016-2020 Free Software Foundation, |
Andrew Geissler | 82c905d | 2020-04-13 13:39:40 -0500 | [diff] [blame] | 3 | dnl Inc. |
| 4 | dnl This file is free software; the Free Software Foundation |
| 5 | dnl gives unlimited permission to copy and/or distribute it, |
| 6 | dnl with or without modifications, as long as this notice is preserved. |
| 7 | |
| 8 | dnl From Bruno Haible. |
| 9 | |
| 10 | AC_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 | |
| 21 | AC_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 $INCICONV to CPPFLAGS before performing the following checks, |
| 32 | dnl because if the user has installed libiconv and not disabled its use |
| 33 | dnl via --without-libiconv-prefix, he wants to use it. The first |
| 34 | dnl AC_LINK_IFELSE will then fail, the second AC_LINK_IFELSE will succeed. |
| 35 | am_save_CPPFLAGS="$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 | |
| 228 | dnl Define AM_ICONV using AC_DEFUN_ONCE for Autoconf >= 2.64, in order to |
| 229 | dnl avoid warnings like |
| 230 | dnl "warning: AC_REQUIRE: `AM_ICONV' was expanded before it was required". |
| 231 | dnl This is tricky because of the way 'aclocal' is implemented: |
| 232 | dnl - It requires defining an auxiliary macro whose name ends in AC_DEFUN. |
| 233 | dnl Otherwise aclocal's initial scan pass would miss the macro definition. |
| 234 | dnl - It requires a line break inside the AC_DEFUN_ONCE and AC_DEFUN expansions. |
| 235 | dnl Otherwise aclocal would emit many "Use of uninitialized value $1" |
| 236 | dnl warnings. |
| 237 | m4_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], [$2])]])])) |
| 246 | gl_iconv_AC_DEFUN([AM_ICONV], |
| 247 | [ |
| 248 | AM_ICONV_LINK |
| 249 | if test "$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> |
| 257 | extern |
| 258 | #ifdef __cplusplus |
| 259 | "C" |
| 260 | #endif |
| 261 | #if defined(__STDC__) || defined(_MSC_VER) || defined(__cplusplus) |
| 262 | size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft); |
| 263 | #else |
| 264 | size_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([ |
| 273 | $am_cv_proto_iconv]) |
| 274 | else |
| 275 | dnl When compiling GNU libiconv on a system that does not have iconv yet, |
| 276 | dnl pick the POSIX compliant declaration without 'const'. |
| 277 | am_cv_proto_iconv_arg1="" |
| 278 | fi |
| 279 | AC_DEFINE_UNQUOTED([ICONV_CONST], [$am_cv_proto_iconv_arg1], |
| 280 | [Define as const if the declaration of iconv() needs const.]) |
| 281 | dnl Also substitute ICONV_CONST in the gnulib generated <iconv.h>. |
| 282 | m4_ifdef([gl_ICONV_H_DEFAULTS], |
| 283 | [AC_REQUIRE([gl_ICONV_H_DEFAULTS]) |
| 284 | if test -n "$am_cv_proto_iconv_arg1"; then |
| 285 | ICONV_CONST="const" |
| 286 | fi |
| 287 | ]) |
| 288 | ]) |