config/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 dnl with modifications to support building with in-tree libiconv
  11
  12 AC_DEFUN([AM_ICONV_LINKFLAGS_BODY],
  13 [
  14   dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
  15   AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
  16   AC_REQUIRE([AC_LIB_RPATH])
  17
  18   dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
  19   dnl accordingly.
  20   AC_LIB_LINKFLAGS_BODY([iconv])
  21 ])
  22
  23 AC_DEFUN([AM_ICONV_LINK],
  24 [
  25   dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
  26   dnl those with the standalone portable GNU libiconv installed).
  27
  28   dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
  29   dnl accordingly.
  30   AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
  31
  32   AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [
  33     am_cv_func_iconv="no, consider installing GNU libiconv"
  34     am_cv_lib_iconv=no
  35     dnl Add $INCICONV to CPPFLAGS before performing the first check,
  36     dnl because if the user has installed libiconv and not disabled its use
  37     dnl via --without-libiconv-prefix, he wants to use it. This first
  38     dnl AC_TRY_LINK will then fail, the second AC_TRY_LINK will succeed.
  39     am_save_CPPFLAGS="$CPPFLAGS"
  40     CPPFLAGS="$CPPFLAGS $INCICONV"
  41     AC_TRY_LINK([#include <stdlib.h>
  42 #include <iconv.h>],
  43       [iconv_t cd = iconv_open("","");
  44        iconv(cd,NULL,NULL,NULL,NULL);
  45        iconv_close(cd);],
  46       am_cv_func_iconv=yes)
  47     CPPFLAGS="$am_save_CPPFLAGS"
  48
  49     if test "$am_cv_func_iconv" != yes && test -d ../libiconv; then
  50       for _libs in .libs _libs; do
  51         am_save_CPPFLAGS="$CPPFLAGS"
  52         am_save_LIBS="$LIBS"
  53         CPPFLAGS="$CPPFLAGS -I../libiconv/include"
  54         LIBS="$LIBS ../libiconv/lib/$_libs/libiconv.a"
  55         AC_TRY_LINK([#include <stdlib.h>
  56 #include <iconv.h>],
  57           [iconv_t cd = iconv_open("","");
  58            iconv(cd,NULL,NULL,NULL,NULL);
  59            iconv_close(cd);],
  60           INCICONV="-I../libiconv/include"
  61           LIBICONV='${top_builddir}'/../libiconv/lib/$_libs/libiconv.a
  62           LTLIBICONV='${top_builddir}'/../libiconv/lib/libiconv.la
  63           am_cv_lib_iconv=yes
  64           am_cv_func_iconv=yes)
  65         CPPFLAGS="$am_save_CPPFLAGS"
  66         LIBS="$am_save_LIBS"
  67         if test "$am_cv_func_iconv" = "yes"; then
  68           break
  69         fi
  70       done
  71     fi
  72
  73     if test "$am_cv_func_iconv" != yes; then
  74       am_save_CPPFLAGS="$CPPFLAGS"
  75       am_save_LIBS="$LIBS"
  76       CPPFLAGS="$CPPFLAGS $INCICONV"
  77       LIBS="$LIBS $LIBICONV"
  78       AC_TRY_LINK([#include <stdlib.h>
  79 #include <iconv.h>],
  80         [iconv_t cd = iconv_open("","");
  81          iconv(cd,NULL,NULL,NULL,NULL);
  82          iconv_close(cd);],
  83         am_cv_lib_iconv=yes
  84         am_cv_func_iconv=yes)
  85       CPPFLAGS="$am_save_CPPFLAGS"
  86       LIBS="$am_save_LIBS"
  87     fi
  88   ])
  89   if test "$am_cv_func_iconv" = yes; then
  90     AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
  91   fi
  92   if test "$am_cv_lib_iconv" = yes; then
  93     AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])
  94     AC_MSG_CHECKING([how to link with libiconv])
  95     AC_MSG_RESULT([$LIBICONV])
  96   else
  97     LIBICONV=
  98     LTLIBICONV=
  99   fi
 100   AC_SUBST(LIBICONV)
 101   AC_SUBST(LTLIBICONV)
 102 ])
 103
 104 AC_DEFUN([AM_ICONV],
 105 [
 106   AM_ICONV_LINK
 107   if test "$am_cv_func_iconv" = yes; then
 108     AC_MSG_CHECKING([for iconv declaration])
 109     AC_CACHE_VAL(am_cv_proto_iconv, [
 110       AC_TRY_COMPILE([
 111 #include <stdlib.h>
 112 #include <iconv.h>
 113 extern
 114 #ifdef __cplusplus
 115 "C"
 116 #endif
 117 #if defined(__STDC__) || defined(__cplusplus)
 118 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
 119 #else
 120 size_t iconv();
 121 #endif
 122 ], [], am_cv_proto_iconv_arg1="", am_cv_proto_iconv_arg1="const")
 123       am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
 124     am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
 125     AC_MSG_RESULT([$]{ac_t:-
 126          }[$]am_cv_proto_iconv)
 127     AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1,
 128       [Define as const if the declaration of iconv() needs const.])
 129   fi
 130 ])