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1 #serial 2
2
3 dnl From Bruno Haible.
4
5 AC_DEFUN([MUTT_AM_ICONV],
6 [
7   dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
8   dnl those with the standalone portable GNU libiconv installed).
9
10   AC_ARG_WITH([libiconv-prefix],
11 AC_HELP_STRING([--with-libiconv-prefix@<:@=DIR@:>@], [Search for libiconv in DIR/include and DIR/lib]), [
12     for dir in `echo "$withval" | tr : ' '`; do
13       if test -d $dir/include; then CPPFLAGS="$CPPFLAGS -I$dir/include"; fi
14       if test -d $dir/lib; then LDFLAGS="$LDFLAGS -L$dir/lib"; fi
15     done
16    ])
17
18   AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [
19     am_cv_func_iconv="no, consider installing GNU libiconv"
20     am_cv_lib_iconv=no
21     AC_TRY_LINK([#include <stdlib.h>
22 #include <iconv.h>],
23       [iconv_t cd = iconv_open("","");
24        iconv(cd,NULL,NULL,NULL,NULL);
25        iconv_close(cd);],
26       am_cv_func_iconv=yes)
27     if test "$am_cv_func_iconv" != yes; then
28       am_save_LIBS="$LIBS"
29       LIBS="$LIBS -liconv"
30       AC_TRY_LINK([#include <stdlib.h>
31 #include <iconv.h>],
32         [iconv_t cd = iconv_open("","");
33          iconv(cd,NULL,NULL,NULL,NULL);
34          iconv_close(cd);],
35         am_cv_lib_iconv=yes
36         am_cv_func_iconv=yes)
37       LIBS="$am_save_LIBS"
38     fi
39   ])
40   if test "$am_cv_func_iconv" = yes; then
41     AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
42     AC_MSG_CHECKING([for iconv declaration])
43     AC_CACHE_VAL(am_cv_proto_iconv, [
44       AC_TRY_COMPILE([
45 #include <stdlib.h>
46 #include <iconv.h>
47 extern
48 #ifdef __cplusplus
49 "C"
50 #endif
51 #if defined(__STDC__) || defined(__cplusplus)
52 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
53 #else
54 size_t iconv();
55 #endif
56 ], [], am_cv_proto_iconv_arg1="", am_cv_proto_iconv_arg1="const")
57       am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
58     am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
59     AC_MSG_RESULT([$]{ac_t:-
60          }[$]am_cv_proto_iconv)
61     AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1,
62       [Define as const if the declaration of iconv() needs const.])
63   fi
64   LIBICONV=
65   if test "$am_cv_lib_iconv" = yes; then
66     LIBICONV="-liconv"
67   fi
68   AC_SUBST(LIBICONV)
69 ])