Dogcows Code - chaz/openbox/blob - m4/iconv.m4

   1 # iconv.m4 serial AM4 (gettext-0.11.3)
   2 dnl Copyright (C) 2000-2002 Free Software Foundation, Inc.
   3 dnl This file is free software, distributed under the terms of the GNU
   4 dnl General Public License.  As a special exception to the GNU General
   5 dnl Public License, this file may be distributed as part of a program
   6 dnl that contains a configuration script generated by Autoconf, under
   7 dnl the same distribution terms as the rest of that program.
   8
   9 dnl From Bruno Haible.
  10
  11 AC_DEFUN([AM_ICONV_LINKFLAGS_BODY],
  12 [
  13   dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
  14   AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
  15   AC_REQUIRE([AC_LIB_RPATH])
  16
  17   dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
  18   dnl accordingly.
  19   AC_LIB_LINKFLAGS_BODY([iconv])
  20 ])
  21
  22 AC_DEFUN([AM_ICONV_LINK],
  23 [
  24   dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
  25   dnl those with the standalone portable GNU libiconv installed).
  26
  27   dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
  28   dnl accordingly.
  29   AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
  30
  31   dnl Add $INCICONV to CPPFLAGS before performing the following checks,
  32   dnl because if the user has installed libiconv and not disabled its use
  33   dnl via --without-libiconv-prefix, he wants to use it. The first
  34   dnl AC_TRY_LINK will then fail, the second AC_TRY_LINK will succeed.
  35   am_save_CPPFLAGS="$CPPFLAGS"
  36   AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])
  37
  38   AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [
  39     am_cv_func_iconv="no, consider installing GNU libiconv"
  40     am_cv_lib_iconv=no
  41     AC_TRY_LINK([#include <stdlib.h>
  42 #include <iconv.h>],
  43       [iconv_t cd = iconv_open("","");
  44        iconv(cd,NULL,NULL,NULL,NULL);
  45        iconv_close(cd);],
  46       am_cv_func_iconv=yes)
  47     if test "$am_cv_func_iconv" != yes; then
  48       am_save_LIBS="$LIBS"
  49       LIBS="$LIBS $LIBICONV"
  50       AC_TRY_LINK([#include <stdlib.h>
  51 #include <iconv.h>],
  52         [iconv_t cd = iconv_open("","");
  53          iconv(cd,NULL,NULL,NULL,NULL);
  54          iconv_close(cd);],
  55         am_cv_lib_iconv=yes
  56         am_cv_func_iconv=yes)
  57       LIBS="$am_save_LIBS"
  58     fi
  59   ])
  60   if test "$am_cv_func_iconv" = yes; then
  61     AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
  62   fi
  63   if test "$am_cv_lib_iconv" = yes; then
  64     AC_MSG_CHECKING([how to link with libiconv])
  65     AC_MSG_RESULT([$LIBICONV])
  66   else
  67     dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
  68     dnl either.
  69     CPPFLAGS="$am_save_CPPFLAGS"
  70     LIBICONV=
  71     LTLIBICONV=
  72   fi
  73   AC_SUBST(LIBICONV)
  74   AC_SUBST(LTLIBICONV)
  75 ])
  76
  77 AC_DEFUN([AM_ICONV],
  78 [
  79   AM_ICONV_LINK
  80   if test "$am_cv_func_iconv" = yes; then
  81     AC_MSG_CHECKING([for iconv declaration])
  82     AC_CACHE_VAL(am_cv_proto_iconv, [
  83       AC_TRY_COMPILE([
  84 #include <stdlib.h>
  85 #include <iconv.h>
  86 extern
  87 #ifdef __cplusplus
  88 "C"
  89 #endif
  90 #if defined(__STDC__) || defined(__cplusplus)
  91 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
  92 #else
  93 size_t iconv();
  94 #endif
  95 ], [], am_cv_proto_iconv_arg1="", am_cv_proto_iconv_arg1="const")
  96       am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
  97     am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
  98     AC_MSG_RESULT([$]{ac_t:-
  99          }[$]am_cv_proto_iconv)
 100     AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1,
 101       [Define as const if the declaration of iconv() needs const.])
 102   fi
 103 ])