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

   1 # iconv.m4 serial 11 (gettext-0.18.1)
   2 dnl Copyright (C) 2000-2002, 2007-2010 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 "$am_cv_func_iconv" = yes; then
  60     AC_CACHE_CHECK([for working iconv], [am_cv_func_iconv_works], [
  61       dnl This tests against bugs in AIX 5.1, HP-UX 11.11, Solaris 10.
  62       am_save_LIBS="$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   /* Test against Solaris 10 bug: Failures are not distinguishable from
  91      successful returns.  */
  92   {
  93     iconv_t cd_ascii_to_88591 = iconv_open ("ISO8859-1", "646");
  94     if (cd_ascii_to_88591 != (iconv_t)(-1))
  95       {
  96         static const char input[] = "\263";
  97         char buf[10];
  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_ascii_to_88591,
 103                             (char **) &inptr, &inbytesleft,
 104                             &outptr, &outbytesleft);
 105         if (res == 0)
 106           return 1;
 107       }
 108   }
 109 #if 0 /* This bug could be worked around by the caller.  */
 110   /* Test against HP-UX 11.11 bug: Positive return value instead of 0.  */
 111   {
 112     iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591");
 113     if (cd_88591_to_utf8 != (iconv_t)(-1))
 114       {
 115         static const char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
 116         char buf[50];
 117         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_88591_to_utf8,
 122                             (char **) &inptr, &inbytesleft,
 123                             &outptr, &outbytesleft);
 124         if ((int)res > 0)
 125           return 1;
 126       }
 127   }
 128 #endif
 129   /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is
 130      provided.  */
 131   if (/* Try standardized names.  */
 132       iconv_open ("UTF-8", "EUC-JP") == (iconv_t)(-1)
 133       /* Try IRIX, OSF/1 names.  */
 134       && iconv_open ("UTF-8", "eucJP") == (iconv_t)(-1)
 135       /* Try AIX names.  */
 136       && iconv_open ("UTF-8", "IBM-eucJP") == (iconv_t)(-1)
 137       /* Try HP-UX names.  */
 138       && iconv_open ("utf8", "eucJP") == (iconv_t)(-1))
 139     return 1;
 140   return 0;
 141 }], [am_cv_func_iconv_works=yes], [am_cv_func_iconv_works=no],
 142         [case "$host_os" in
 143            aix* | hpux*) am_cv_func_iconv_works="guessing no" ;;
 144            *)            am_cv_func_iconv_works="guessing yes" ;;
 145          esac])
 146       LIBS="$am_save_LIBS"
 147     ])
 148     case "$am_cv_func_iconv_works" in
 149       *no) am_func_iconv=no am_cv_lib_iconv=no ;;
 150       *)   am_func_iconv=yes ;;
 151     esac
 152   else
 153     am_func_iconv=no am_cv_lib_iconv=no
 154   fi
 155   if test "$am_func_iconv" = yes; then
 156     AC_DEFINE([HAVE_ICONV], [1],
 157       [Define if you have the iconv() function and it works.])
 158   fi
 159   if test "$am_cv_lib_iconv" = yes; then
 160     AC_MSG_CHECKING([how to link with libiconv])
 161     AC_MSG_RESULT([$LIBICONV])
 162   else
 163     dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
 164     dnl either.
 165     CPPFLAGS="$am_save_CPPFLAGS"
 166     LIBICONV=
 167     LTLIBICONV=
 168   fi
 169   AC_SUBST([LIBICONV])
 170   AC_SUBST([LTLIBICONV])
 171 ])
 172
 173 dnl Define AM_ICONV using AC_DEFUN_ONCE for Autoconf >= 2.64, in order to
 174 dnl avoid warnings like
 175 dnl "warning: AC_REQUIRE: `AM_ICONV' was expanded before it was required".
 176 dnl This is tricky because of the way 'aclocal' is implemented:
 177 dnl - It requires defining an auxiliary macro whose name ends in AC_DEFUN.
 178 dnl   Otherwise aclocal's initial scan pass would miss the macro definition.
 179 dnl - It requires a line break inside the AC_DEFUN_ONCE and AC_DEFUN expansions.
 180 dnl   Otherwise aclocal would emit many "Use of uninitialized value $1"
 181 dnl   warnings.
 182 m4_define([gl_iconv_AC_DEFUN],
 183   m4_version_prereq([2.64],
 184     [[AC_DEFUN_ONCE(
 185         [$1], [$2])]],
 186     [[AC_DEFUN(
 187         [$1], [$2])]]))
 188 gl_iconv_AC_DEFUN([AM_ICONV],
 189 [
 190   AM_ICONV_LINK
 191   if test "$am_cv_func_iconv" = yes; then
 192     AC_MSG_CHECKING([for iconv declaration])
 193     AC_CACHE_VAL([am_cv_proto_iconv], [
 194       AC_TRY_COMPILE([
 195 #include <stdlib.h>
 196 #include <iconv.h>
 197 extern
 198 #ifdef __cplusplus
 199 "C"
 200 #endif
 201 #if defined(__STDC__) || defined(__cplusplus)
 202 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
 203 #else
 204 size_t iconv();
 205 #endif
 206 ], [], [am_cv_proto_iconv_arg1=""], [am_cv_proto_iconv_arg1="const"])
 207       am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
 208     am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
 209     AC_MSG_RESULT([
 210          $am_cv_proto_iconv])
 211     AC_DEFINE_UNQUOTED([ICONV_CONST], [$am_cv_proto_iconv_arg1],
 212       [Define as const if the declaration of iconv() needs const.])
 213   fi
 214 ])