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      1 # iconv.m4 serial 18 (gettext-0.18.2)
      2 dnl Copyright (C) 2000-2002, 2007-2012 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 ])
    269