m4/iconv.m4

   1 # iconv.m4 serial 18 (gettext-0.18.2)
   2 dnl Copyright (C) 2000-2002, 2007-2014 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       AC_RUN_IFELSE(
  76         [AC_LANG_SOURCE([[
  77 #include <iconv.h>
  78 #include <string.h>
  79 int main ()
  80 {
  81   int result = 0;
  82   /* Test against AIX 5.1 bug: Failures are not distinguishable from successful
  83      returns.  */
  84   {
  85     iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8");
  86     if (cd_utf8_to_88591 != (iconv_t)(-1))
  87       {
  88         static const char input[] = "\342\202\254"; /* EURO SIGN */
  89         char buf[10];
  90         const char *inptr = input;
  91         size_t inbytesleft = strlen (input);
  92         char *outptr = buf;
  93         size_t outbytesleft = sizeof (buf);
  94         size_t res = iconv (cd_utf8_to_88591,
  95                             (char **) &inptr, &inbytesleft,
  96                             &outptr, &outbytesleft);
  97         if (res == 0)
  98           result |= 1;
  99         iconv_close (cd_utf8_to_88591);
 100       }
 101   }
 102   /* Test against Solaris 10 bug: Failures are not distinguishable from
 103      successful returns.  */
 104   {
 105     iconv_t cd_ascii_to_88591 = iconv_open ("ISO8859-1", "646");
 106     if (cd_ascii_to_88591 != (iconv_t)(-1))
 107       {
 108         static const char input[] = "\263";
 109         char buf[10];
 110         const char *inptr = input;
 111         size_t inbytesleft = strlen (input);
 112         char *outptr = buf;
 113         size_t outbytesleft = sizeof (buf);
 114         size_t res = iconv (cd_ascii_to_88591,
 115                             (char **) &inptr, &inbytesleft,
 116                             &outptr, &outbytesleft);
 117         if (res == 0)
 118           result |= 2;
 119         iconv_close (cd_ascii_to_88591);
 120       }
 121   }
 122   /* Test against AIX 6.1..7.1 bug: Buffer overrun.  */
 123   {
 124     iconv_t cd_88591_to_utf8 = iconv_open ("UTF-8", "ISO-8859-1");
 125     if (cd_88591_to_utf8 != (iconv_t)(-1))
 126       {
 127         static const char input[] = "\304";
 128         static char buf[2] = { (char)0xDE, (char)0xAD };
 129         const char *inptr = input;
 130         size_t inbytesleft = 1;
 131         char *outptr = buf;
 132         size_t outbytesleft = 1;
 133         size_t res = iconv (cd_88591_to_utf8,
 134                             (char **) &inptr, &inbytesleft,
 135                             &outptr, &outbytesleft);
 136         if (res != (size_t)(-1) || outptr - buf > 1 || buf[1] != (char)0xAD)
 137           result |= 4;
 138         iconv_close (cd_88591_to_utf8);
 139       }
 140   }
 141 #if 0 /* This bug could be worked around by the caller.  */
 142   /* Test against HP-UX 11.11 bug: Positive return value instead of 0.  */
 143   {
 144     iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591");
 145     if (cd_88591_to_utf8 != (iconv_t)(-1))
 146       {
 147         static const char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
 148         char buf[50];
 149         const char *inptr = input;
 150         size_t inbytesleft = strlen (input);
 151         char *outptr = buf;
 152         size_t outbytesleft = sizeof (buf);
 153         size_t res = iconv (cd_88591_to_utf8,
 154                             (char **) &inptr, &inbytesleft,
 155                             &outptr, &outbytesleft);
 156         if ((int)res > 0)
 157           result |= 8;
 158         iconv_close (cd_88591_to_utf8);
 159       }
 160   }
 161 #endif
 162   /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is
 163      provided.  */
 164   if (/* Try standardized names.  */
 165       iconv_open ("UTF-8", "EUC-JP") == (iconv_t)(-1)
 166       /* Try IRIX, OSF/1 names.  */
 167       && iconv_open ("UTF-8", "eucJP") == (iconv_t)(-1)
 168       /* Try AIX names.  */
 169       && iconv_open ("UTF-8", "IBM-eucJP") == (iconv_t)(-1)
 170       /* Try HP-UX names.  */
 171       && iconv_open ("utf8", "eucJP") == (iconv_t)(-1))
 172     result |= 16;
 173   return result;
 174 }]])],
 175         [am_cv_func_iconv_works=yes],
 176         [am_cv_func_iconv_works=no],
 177         [
 178 changequote(,)dnl
 179          case "$host_os" in
 180            aix* | hpux*) am_cv_func_iconv_works="guessing no" ;;
 181            *)            am_cv_func_iconv_works="guessing yes" ;;
 182          esac
 183 changequote([,])dnl
 184         ])
 185       LIBS="$am_save_LIBS"
 186     ])
 187     case "$am_cv_func_iconv_works" in
 188       *no) am_func_iconv=no am_cv_lib_iconv=no ;;
 189       *)   am_func_iconv=yes ;;
 190     esac
 191   else
 192     am_func_iconv=no am_cv_lib_iconv=no
 193   fi
 194   if test "$am_func_iconv" = yes; then
 195     AC_DEFINE([HAVE_ICONV], [1],
 196       [Define if you have the iconv() function and it works.])
 197   fi
 198   if test "$am_cv_lib_iconv" = yes; then
 199     AC_MSG_CHECKING([how to link with libiconv])
 200     AC_MSG_RESULT([$LIBICONV])
 201   else
 202     dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
 203     dnl either.
 204     CPPFLAGS="$am_save_CPPFLAGS"
 205     LIBICONV=
 206     LTLIBICONV=
 207   fi
 208   AC_SUBST([LIBICONV])
 209   AC_SUBST([LTLIBICONV])
 210 ])
 211
 212 dnl Define AM_ICONV using AC_DEFUN_ONCE for Autoconf >= 2.64, in order to
 213 dnl avoid warnings like
 214 dnl "warning: AC_REQUIRE: `AM_ICONV' was expanded before it was required".
 215 dnl This is tricky because of the way 'aclocal' is implemented:
 216 dnl - It requires defining an auxiliary macro whose name ends in AC_DEFUN.
 217 dnl   Otherwise aclocal's initial scan pass would miss the macro definition.
 218 dnl - It requires a line break inside the AC_DEFUN_ONCE and AC_DEFUN expansions.
 219 dnl   Otherwise aclocal would emit many "Use of uninitialized value $1"
 220 dnl   warnings.
 221 m4_define([gl_iconv_AC_DEFUN],
 222   m4_version_prereq([2.64],
 223     [[AC_DEFUN_ONCE(
 224         [$1], [$2])]],
 225     [m4_ifdef([gl_00GNULIB],
 226        [[AC_DEFUN_ONCE(
 227            [$1], [$2])]],
 228        [[AC_DEFUN(
 229            [$1], [$2])]])]))
 230 gl_iconv_AC_DEFUN([AM_ICONV],
 231 [
 232   AM_ICONV_LINK
 233   if test "$am_cv_func_iconv" = yes; then
 234     AC_MSG_CHECKING([for iconv declaration])
 235     AC_CACHE_VAL([am_cv_proto_iconv], [
 236       AC_COMPILE_IFELSE(
 237         [AC_LANG_PROGRAM(
 238            [[
 239 #include <stdlib.h>
 240 #include <iconv.h>
 241 extern
 242 #ifdef __cplusplus
 243 "C"
 244 #endif
 245 #if defined(__STDC__) || defined(_MSC_VER) || defined(__cplusplus)
 246 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
 247 #else
 248 size_t iconv();
 249 #endif
 250            ]],
 251            [[]])],
 252         [am_cv_proto_iconv_arg1=""],
 253         [am_cv_proto_iconv_arg1="const"])
 254       am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
 255     am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
 256     AC_MSG_RESULT([
 257          $am_cv_proto_iconv])
 258     AC_DEFINE_UNQUOTED([ICONV_CONST], [$am_cv_proto_iconv_arg1],
 259       [Define as const if the declaration of iconv() needs const.])
 260     dnl Also substitute ICONV_CONST in the gnulib generated <iconv.h>.
 261     m4_ifdef([gl_ICONV_H_DEFAULTS],
 262       [AC_REQUIRE([gl_ICONV_H_DEFAULTS])
 263        if test -n "$am_cv_proto_iconv_arg1"; then
 264          ICONV_CONST="const"
 265        fi
 266       ])
 267   fi
 268 ])