git.m6w6.name Git - awesomized/libmemcached/blob - m4/iconv.m4

   1 # iconv.m4 serial AM6 (gettext-0.17)
   2 dnl Copyright (C) 2000-2002, 2007 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 $INCICONV to CPPFLAGS before performing the following checks,
  31   dnl because if the user has installed libiconv and not disabled its use
  32   dnl via --without-libiconv-prefix, he wants to use it. The first
  33   dnl AC_TRY_LINK will then fail, the second AC_TRY_LINK will succeed.
  34   am_save_CPPFLAGS="$CPPFLAGS"
  35   AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])
  36
  37   AC_CACHE_CHECK([for iconv], am_cv_func_iconv, [
  38     am_cv_func_iconv="no, consider installing GNU libiconv"
  39     am_cv_lib_iconv=no
  40     AC_TRY_LINK([#include <stdlib.h>
  41 #include <iconv.h>],
  42       [iconv_t cd = iconv_open("","");
  43        iconv(cd,NULL,NULL,NULL,NULL);
  44        iconv_close(cd);],
  45       am_cv_func_iconv=yes)
  46     if test "$am_cv_func_iconv" != yes; then
  47       am_save_LIBS="$LIBS"
  48       LIBS="$LIBS $LIBICONV"
  49       AC_TRY_LINK([#include <stdlib.h>
  50 #include <iconv.h>],
  51         [iconv_t cd = iconv_open("","");
  52          iconv(cd,NULL,NULL,NULL,NULL);
  53          iconv_close(cd);],
  54         am_cv_lib_iconv=yes
  55         am_cv_func_iconv=yes)
  56       LIBS="$am_save_LIBS"
  57     fi
  58   ])
  59   if test "$am_cv_func_iconv" = yes; then
  60     AC_CACHE_CHECK([for working iconv], am_cv_func_iconv_works, [
  61       dnl This tests against bugs in AIX 5.1 and HP-UX 11.11.
  62       am_save_LIBS="$LIBS"
  63       if test $am_cv_lib_iconv = yes; then
  64         LIBS="$LIBS $LIBICONV"
  65       fi
  66       AC_TRY_RUN([
  67 #include <iconv.h>
  68 #include <string.h>
  69 int main ()
  70 {
  71   /* Test against AIX 5.1 bug: Failures are not distinguishable from successful
  72      returns.  */
  73   {
  74     iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8");
  75     if (cd_utf8_to_88591 != (iconv_t)(-1))
  76       {
  77         static const char input[] = "\342\202\254"; /* EURO SIGN */
  78         char buf[10];
  79         const char *inptr = input;
  80         size_t inbytesleft = strlen (input);
  81         char *outptr = buf;
  82         size_t outbytesleft = sizeof (buf);
  83         size_t res = iconv (cd_utf8_to_88591,
  84                             (char **) &inptr, &inbytesleft,
  85                             &outptr, &outbytesleft);
  86         if (res == 0)
  87           return 1;
  88       }
  89   }
  90 #if 0 /* This bug could be worked around by the caller.  */
  91   /* Test against HP-UX 11.11 bug: Positive return value instead of 0.  */
  92   {
  93     iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591");
  94     if (cd_88591_to_utf8 != (iconv_t)(-1))
  95       {
  96         static const char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
  97         char buf[50];
  98         const char *inptr = input;
  99         size_t inbytesleft = strlen (input);
 100         char *outptr = buf;
 101         size_t outbytesleft = sizeof (buf);
 102         size_t res = iconv (cd_88591_to_utf8,
 103                             (char **) &inptr, &inbytesleft,
 104                             &outptr, &outbytesleft);
 105         if ((int)res > 0)
 106           return 1;
 107       }
 108   }
 109 #endif
 110   /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is
 111      provided.  */
 112   if (/* Try standardized names.  */
 113       iconv_open ("UTF-8", "EUC-JP") == (iconv_t)(-1)
 114       /* Try IRIX, OSF/1 names.  */
 115       && iconv_open ("UTF-8", "eucJP") == (iconv_t)(-1)
 116       /* Try AIX names.  */
 117       && iconv_open ("UTF-8", "IBM-eucJP") == (iconv_t)(-1)
 118       /* Try HP-UX names.  */
 119       && iconv_open ("utf8", "eucJP") == (iconv_t)(-1))
 120     return 1;
 121   return 0;
 122 }], [am_cv_func_iconv_works=yes], [am_cv_func_iconv_works=no],
 123         [case "$host_os" in
 124            aix* | hpux*) am_cv_func_iconv_works="guessing no" ;;
 125            *)            am_cv_func_iconv_works="guessing yes" ;;
 126          esac])
 127       LIBS="$am_save_LIBS"
 128     ])
 129     case "$am_cv_func_iconv_works" in
 130       *no) am_func_iconv=no am_cv_lib_iconv=no ;;
 131       *)   am_func_iconv=yes ;;
 132     esac
 133   else
 134     am_func_iconv=no am_cv_lib_iconv=no
 135   fi
 136   if test "$am_func_iconv" = yes; then
 137     AC_DEFINE(HAVE_ICONV, 1,
 138       [Define if you have the iconv() function and it works.])
 139   fi
 140   if test "$am_cv_lib_iconv" = yes; then
 141     AC_MSG_CHECKING([how to link with libiconv])
 142     AC_MSG_RESULT([$LIBICONV])
 143   else
 144     dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
 145     dnl either.
 146     CPPFLAGS="$am_save_CPPFLAGS"
 147     LIBICONV=
 148     LTLIBICONV=
 149   fi
 150   AC_SUBST(LIBICONV)
 151   AC_SUBST(LTLIBICONV)
 152 ])
 153
 154 AC_DEFUN([AM_ICONV],
 155 [
 156   AM_ICONV_LINK
 157   if test "$am_cv_func_iconv" = yes; then
 158     AC_MSG_CHECKING([for iconv declaration])
 159     AC_CACHE_VAL(am_cv_proto_iconv, [
 160       AC_TRY_COMPILE([
 161 #include <stdlib.h>
 162 #include <iconv.h>
 163 extern
 164 #ifdef __cplusplus
 165 "C"
 166 #endif
 167 #if defined(__STDC__) || defined(__cplusplus)
 168 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
 169 #else
 170 size_t iconv();
 171 #endif
 172 ], [], am_cv_proto_iconv_arg1="", am_cv_proto_iconv_arg1="const")
 173       am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
 174     am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
 175     AC_MSG_RESULT([$]{ac_t:-
 176          }[$]am_cv_proto_iconv)
 177     AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1,
 178       [Define as const if the declaration of iconv() needs const.])
 179   fi
 180 ])