Patrick Williams | 7784c42 | 2022-11-17 07:29:11 -0600 | [diff] [blame^] | 1 | # iconv.m4 serial 24 |
| 2 | dnl Copyright (C) 2000-2002, 2007-2014, 2016-2022 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 | |
Patrick Williams | 7784c42 | 2022-11-17 07:29:11 -0600 | [diff] [blame^] | 10 | AC_PREREQ([2.64]) |
| 11 | |
| 12 | dnl Note: AM_ICONV is documented in the GNU gettext manual |
| 13 | dnl <https://www.gnu.org/software/gettext/manual/html_node/AM_005fICONV.html>. |
| 14 | dnl Don't make changes that are incompatible with that documentation! |
| 15 | |
Andrew Geissler | 82c905d | 2020-04-13 13:39:40 -0500 | [diff] [blame] | 16 | AC_DEFUN([AM_ICONV_LINKFLAGS_BODY], |
| 17 | [ |
| 18 | dnl Prerequisites of AC_LIB_LINKFLAGS_BODY. |
| 19 | AC_REQUIRE([AC_LIB_PREPARE_PREFIX]) |
| 20 | AC_REQUIRE([AC_LIB_RPATH]) |
| 21 | |
| 22 | dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV |
| 23 | dnl accordingly. |
| 24 | AC_LIB_LINKFLAGS_BODY([iconv]) |
| 25 | ]) |
| 26 | |
| 27 | AC_DEFUN([AM_ICONV_LINK], |
| 28 | [ |
| 29 | dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and |
| 30 | dnl those with the standalone portable GNU libiconv installed). |
| 31 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| 32 | |
| 33 | dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV |
| 34 | dnl accordingly. |
| 35 | AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY]) |
| 36 | |
| 37 | dnl Add $INCICONV to CPPFLAGS before performing the following checks, |
| 38 | dnl because if the user has installed libiconv and not disabled its use |
| 39 | dnl via --without-libiconv-prefix, he wants to use it. The first |
| 40 | dnl AC_LINK_IFELSE will then fail, the second AC_LINK_IFELSE will succeed. |
| 41 | am_save_CPPFLAGS="$CPPFLAGS" |
| 42 | AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV]) |
| 43 | |
| 44 | AC_CACHE_CHECK([for iconv], [am_cv_func_iconv], [ |
| 45 | am_cv_func_iconv="no, consider installing GNU libiconv" |
| 46 | am_cv_lib_iconv=no |
| 47 | AC_LINK_IFELSE( |
| 48 | [AC_LANG_PROGRAM( |
| 49 | [[ |
| 50 | #include <stdlib.h> |
| 51 | #include <iconv.h> |
| 52 | ]], |
| 53 | [[iconv_t cd = iconv_open("",""); |
| 54 | iconv(cd,NULL,NULL,NULL,NULL); |
| 55 | iconv_close(cd);]])], |
| 56 | [am_cv_func_iconv=yes]) |
| 57 | if test "$am_cv_func_iconv" != yes; then |
| 58 | am_save_LIBS="$LIBS" |
| 59 | LIBS="$LIBS $LIBICONV" |
| 60 | AC_LINK_IFELSE( |
| 61 | [AC_LANG_PROGRAM( |
| 62 | [[ |
| 63 | #include <stdlib.h> |
| 64 | #include <iconv.h> |
| 65 | ]], |
| 66 | [[iconv_t cd = iconv_open("",""); |
| 67 | iconv(cd,NULL,NULL,NULL,NULL); |
| 68 | iconv_close(cd);]])], |
| 69 | [am_cv_lib_iconv=yes] |
| 70 | [am_cv_func_iconv=yes]) |
| 71 | LIBS="$am_save_LIBS" |
| 72 | fi |
| 73 | ]) |
| 74 | if test "$am_cv_func_iconv" = yes; then |
| 75 | AC_CACHE_CHECK([for working iconv], [am_cv_func_iconv_works], [ |
| 76 | dnl This tests against bugs in AIX 5.1, AIX 6.1..7.1, HP-UX 11.11, |
| 77 | dnl Solaris 10. |
| 78 | am_save_LIBS="$LIBS" |
| 79 | if test $am_cv_lib_iconv = yes; then |
| 80 | LIBS="$LIBS $LIBICONV" |
| 81 | fi |
| 82 | am_cv_func_iconv_works=no |
| 83 | for ac_iconv_const in '' 'const'; do |
| 84 | AC_RUN_IFELSE( |
| 85 | [AC_LANG_PROGRAM( |
| 86 | [[ |
| 87 | #include <iconv.h> |
| 88 | #include <string.h> |
| 89 | |
| 90 | #ifndef ICONV_CONST |
| 91 | # define ICONV_CONST $ac_iconv_const |
| 92 | #endif |
| 93 | ]], |
| 94 | [[int result = 0; |
Patrick Williams | 7784c42 | 2022-11-17 07:29:11 -0600 | [diff] [blame^] | 95 | /* Test against AIX 5.1...7.2 bug: Failures are not distinguishable from |
| 96 | successful returns. This is even documented in |
| 97 | <https://www.ibm.com/support/knowledgecenter/ssw_aix_72/i_bostechref/iconv.html> */ |
Andrew Geissler | 82c905d | 2020-04-13 13:39:40 -0500 | [diff] [blame] | 98 | { |
| 99 | iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8"); |
| 100 | if (cd_utf8_to_88591 != (iconv_t)(-1)) |
| 101 | { |
| 102 | static ICONV_CONST char input[] = "\342\202\254"; /* EURO SIGN */ |
| 103 | char buf[10]; |
| 104 | ICONV_CONST char *inptr = input; |
| 105 | size_t inbytesleft = strlen (input); |
| 106 | char *outptr = buf; |
| 107 | size_t outbytesleft = sizeof (buf); |
| 108 | size_t res = iconv (cd_utf8_to_88591, |
| 109 | &inptr, &inbytesleft, |
| 110 | &outptr, &outbytesleft); |
| 111 | if (res == 0) |
| 112 | result |= 1; |
| 113 | iconv_close (cd_utf8_to_88591); |
| 114 | } |
| 115 | } |
| 116 | /* Test against Solaris 10 bug: Failures are not distinguishable from |
| 117 | successful returns. */ |
| 118 | { |
| 119 | iconv_t cd_ascii_to_88591 = iconv_open ("ISO8859-1", "646"); |
| 120 | if (cd_ascii_to_88591 != (iconv_t)(-1)) |
| 121 | { |
| 122 | static ICONV_CONST char input[] = "\263"; |
| 123 | char buf[10]; |
| 124 | ICONV_CONST char *inptr = input; |
| 125 | size_t inbytesleft = strlen (input); |
| 126 | char *outptr = buf; |
| 127 | size_t outbytesleft = sizeof (buf); |
| 128 | size_t res = iconv (cd_ascii_to_88591, |
| 129 | &inptr, &inbytesleft, |
| 130 | &outptr, &outbytesleft); |
| 131 | if (res == 0) |
| 132 | result |= 2; |
| 133 | iconv_close (cd_ascii_to_88591); |
| 134 | } |
| 135 | } |
| 136 | /* Test against AIX 6.1..7.1 bug: Buffer overrun. */ |
| 137 | { |
| 138 | iconv_t cd_88591_to_utf8 = iconv_open ("UTF-8", "ISO-8859-1"); |
| 139 | if (cd_88591_to_utf8 != (iconv_t)(-1)) |
| 140 | { |
| 141 | static ICONV_CONST char input[] = "\304"; |
| 142 | static char buf[2] = { (char)0xDE, (char)0xAD }; |
| 143 | ICONV_CONST char *inptr = input; |
| 144 | size_t inbytesleft = 1; |
| 145 | char *outptr = buf; |
| 146 | size_t outbytesleft = 1; |
| 147 | size_t res = iconv (cd_88591_to_utf8, |
| 148 | &inptr, &inbytesleft, |
| 149 | &outptr, &outbytesleft); |
| 150 | if (res != (size_t)(-1) || outptr - buf > 1 || buf[1] != (char)0xAD) |
| 151 | result |= 4; |
| 152 | iconv_close (cd_88591_to_utf8); |
| 153 | } |
| 154 | } |
| 155 | #if 0 /* This bug could be worked around by the caller. */ |
| 156 | /* Test against HP-UX 11.11 bug: Positive return value instead of 0. */ |
| 157 | { |
| 158 | iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591"); |
| 159 | if (cd_88591_to_utf8 != (iconv_t)(-1)) |
| 160 | { |
| 161 | static ICONV_CONST char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337"; |
| 162 | char buf[50]; |
| 163 | ICONV_CONST char *inptr = input; |
| 164 | size_t inbytesleft = strlen (input); |
| 165 | char *outptr = buf; |
| 166 | size_t outbytesleft = sizeof (buf); |
| 167 | size_t res = iconv (cd_88591_to_utf8, |
| 168 | &inptr, &inbytesleft, |
| 169 | &outptr, &outbytesleft); |
| 170 | if ((int)res > 0) |
| 171 | result |= 8; |
| 172 | iconv_close (cd_88591_to_utf8); |
| 173 | } |
| 174 | } |
| 175 | #endif |
| 176 | /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is |
| 177 | provided. */ |
| 178 | { |
| 179 | /* Try standardized names. */ |
| 180 | iconv_t cd1 = iconv_open ("UTF-8", "EUC-JP"); |
| 181 | /* Try IRIX, OSF/1 names. */ |
| 182 | iconv_t cd2 = iconv_open ("UTF-8", "eucJP"); |
| 183 | /* Try AIX names. */ |
| 184 | iconv_t cd3 = iconv_open ("UTF-8", "IBM-eucJP"); |
| 185 | /* Try HP-UX names. */ |
| 186 | iconv_t cd4 = iconv_open ("utf8", "eucJP"); |
| 187 | if (cd1 == (iconv_t)(-1) && cd2 == (iconv_t)(-1) |
| 188 | && cd3 == (iconv_t)(-1) && cd4 == (iconv_t)(-1)) |
| 189 | result |= 16; |
| 190 | if (cd1 != (iconv_t)(-1)) |
| 191 | iconv_close (cd1); |
| 192 | if (cd2 != (iconv_t)(-1)) |
| 193 | iconv_close (cd2); |
| 194 | if (cd3 != (iconv_t)(-1)) |
| 195 | iconv_close (cd3); |
| 196 | if (cd4 != (iconv_t)(-1)) |
| 197 | iconv_close (cd4); |
| 198 | } |
| 199 | return result; |
| 200 | ]])], |
| 201 | [am_cv_func_iconv_works=yes], , |
| 202 | [case "$host_os" in |
| 203 | aix* | hpux*) am_cv_func_iconv_works="guessing no" ;; |
| 204 | *) am_cv_func_iconv_works="guessing yes" ;; |
| 205 | esac]) |
| 206 | test "$am_cv_func_iconv_works" = no || break |
| 207 | done |
| 208 | LIBS="$am_save_LIBS" |
| 209 | ]) |
| 210 | case "$am_cv_func_iconv_works" in |
| 211 | *no) am_func_iconv=no am_cv_lib_iconv=no ;; |
| 212 | *) am_func_iconv=yes ;; |
| 213 | esac |
| 214 | else |
| 215 | am_func_iconv=no am_cv_lib_iconv=no |
| 216 | fi |
| 217 | if test "$am_func_iconv" = yes; then |
| 218 | AC_DEFINE([HAVE_ICONV], [1], |
| 219 | [Define if you have the iconv() function and it works.]) |
| 220 | fi |
| 221 | if test "$am_cv_lib_iconv" = yes; then |
| 222 | AC_MSG_CHECKING([how to link with libiconv]) |
| 223 | AC_MSG_RESULT([$LIBICONV]) |
| 224 | else |
| 225 | dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV |
| 226 | dnl either. |
| 227 | CPPFLAGS="$am_save_CPPFLAGS" |
| 228 | LIBICONV= |
| 229 | LTLIBICONV= |
| 230 | fi |
| 231 | AC_SUBST([LIBICONV]) |
| 232 | AC_SUBST([LTLIBICONV]) |
| 233 | ]) |
| 234 | |
Patrick Williams | 7784c42 | 2022-11-17 07:29:11 -0600 | [diff] [blame^] | 235 | dnl Define AM_ICONV using AC_DEFUN_ONCE, in order to avoid warnings like |
Andrew Geissler | 82c905d | 2020-04-13 13:39:40 -0500 | [diff] [blame] | 236 | dnl "warning: AC_REQUIRE: `AM_ICONV' was expanded before it was required". |
| 237 | dnl This is tricky because of the way 'aclocal' is implemented: |
| 238 | dnl - It requires defining an auxiliary macro whose name ends in AC_DEFUN. |
| 239 | dnl Otherwise aclocal's initial scan pass would miss the macro definition. |
| 240 | dnl - It requires a line break inside the AC_DEFUN_ONCE and AC_DEFUN expansions. |
| 241 | dnl Otherwise aclocal would emit many "Use of uninitialized value $1" |
| 242 | dnl warnings. |
Patrick Williams | 7784c42 | 2022-11-17 07:29:11 -0600 | [diff] [blame^] | 243 | AC_DEFUN_ONCE([AM_ICONV], |
Andrew Geissler | 82c905d | 2020-04-13 13:39:40 -0500 | [diff] [blame] | 244 | [ |
| 245 | AM_ICONV_LINK |
| 246 | if test "$am_cv_func_iconv" = yes; then |
Patrick Williams | 7784c42 | 2022-11-17 07:29:11 -0600 | [diff] [blame^] | 247 | AC_CACHE_CHECK([whether iconv is compatible with its POSIX signature], |
| 248 | [gl_cv_iconv_nonconst], |
| 249 | [AC_COMPILE_IFELSE( |
| 250 | [AC_LANG_PROGRAM( |
| 251 | [[ |
Andrew Geissler | 82c905d | 2020-04-13 13:39:40 -0500 | [diff] [blame] | 252 | #include <stdlib.h> |
| 253 | #include <iconv.h> |
| 254 | extern |
| 255 | #ifdef __cplusplus |
| 256 | "C" |
| 257 | #endif |
Andrew Geissler | 82c905d | 2020-04-13 13:39:40 -0500 | [diff] [blame] | 258 | size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft); |
Patrick Williams | 7784c42 | 2022-11-17 07:29:11 -0600 | [diff] [blame^] | 259 | ]], |
| 260 | [[]])], |
| 261 | [gl_cv_iconv_nonconst=yes], |
| 262 | [gl_cv_iconv_nonconst=no]) |
| 263 | ]) |
Andrew Geissler | 82c905d | 2020-04-13 13:39:40 -0500 | [diff] [blame] | 264 | else |
| 265 | dnl When compiling GNU libiconv on a system that does not have iconv yet, |
| 266 | dnl pick the POSIX compliant declaration without 'const'. |
Patrick Williams | 7784c42 | 2022-11-17 07:29:11 -0600 | [diff] [blame^] | 267 | gl_cv_iconv_nonconst=yes |
Andrew Geissler | 82c905d | 2020-04-13 13:39:40 -0500 | [diff] [blame] | 268 | fi |
Patrick Williams | 7784c42 | 2022-11-17 07:29:11 -0600 | [diff] [blame^] | 269 | if test $gl_cv_iconv_nonconst = yes; then |
| 270 | iconv_arg1="" |
| 271 | else |
| 272 | iconv_arg1="const" |
| 273 | fi |
| 274 | AC_DEFINE_UNQUOTED([ICONV_CONST], [$iconv_arg1], |
Andrew Geissler | 82c905d | 2020-04-13 13:39:40 -0500 | [diff] [blame] | 275 | [Define as const if the declaration of iconv() needs const.]) |
| 276 | dnl Also substitute ICONV_CONST in the gnulib generated <iconv.h>. |
| 277 | m4_ifdef([gl_ICONV_H_DEFAULTS], |
| 278 | [AC_REQUIRE([gl_ICONV_H_DEFAULTS]) |
Patrick Williams | 7784c42 | 2022-11-17 07:29:11 -0600 | [diff] [blame^] | 279 | if test $gl_cv_iconv_nonconst != yes; then |
Andrew Geissler | 82c905d | 2020-04-13 13:39:40 -0500 | [diff] [blame] | 280 | ICONV_CONST="const" |
| 281 | fi |
| 282 | ]) |
| 283 | ]) |