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Annotation of embedaddon/confuse/m4/iconv.m4, revision 1.1.1.1

1.1       misho       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; 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: 
                     25:   dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
                     26:   dnl accordingly.
                     27:   AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
                     28: 
                     29:   dnl Add $INCICONV to CPPFLAGS before performing the following checks,
                     30:   dnl because if the user has installed libiconv and not disabled its use
                     31:   dnl via --without-libiconv-prefix, he wants to use it. The first
                     32:   dnl AC_TRY_LINK will then fail, the second AC_TRY_LINK will succeed.
                     33:   am_save_CPPFLAGS="$CPPFLAGS"
                     34:   AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])
                     35: 
                     36:   AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [
                     37:     am_cv_func_iconv="no, consider installing GNU libiconv"
                     38:     am_cv_lib_iconv=no
                     39:     AC_TRY_LINK([#include <stdlib.h>
                     40: #include <iconv.h>],
                     41:       [iconv_t cd = iconv_open("","");
                     42:        iconv(cd,NULL,NULL,NULL,NULL);
                     43:        iconv_close(cd);],
                     44:       am_cv_func_iconv=yes)
                     45:     if test "$am_cv_func_iconv" != yes; then
                     46:       am_save_LIBS="$LIBS"
                     47:       LIBS="$LIBS $LIBICONV"
                     48:       AC_TRY_LINK([#include <stdlib.h>
                     49: #include <iconv.h>],
                     50:         [iconv_t cd = iconv_open("","");
                     51:          iconv(cd,NULL,NULL,NULL,NULL);
                     52:          iconv_close(cd);],
                     53:         am_cv_lib_iconv=yes
                     54:         am_cv_func_iconv=yes)
                     55:       LIBS="$am_save_LIBS"
                     56:     fi
                     57:   ])
                     58:   if test "$am_cv_func_iconv" = yes; then
                     59:     AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
                     60:   fi
                     61:   if test "$am_cv_lib_iconv" = yes; then
                     62:     AC_MSG_CHECKING([how to link with libiconv])
                     63:     AC_MSG_RESULT([$LIBICONV])
                     64:   else
                     65:     dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
                     66:     dnl either.
                     67:     CPPFLAGS="$am_save_CPPFLAGS"
                     68:     LIBICONV=
                     69:     LTLIBICONV=
                     70:   fi
                     71:   AC_SUBST(LIBICONV)
                     72:   AC_SUBST(LTLIBICONV)
                     73: ])
                     74: 
                     75: AC_DEFUN([AM_ICONV],
                     76: [
                     77:   AM_ICONV_LINK
                     78:   if test "$am_cv_func_iconv" = yes; then
                     79:     AC_MSG_CHECKING([for iconv declaration])
                     80:     AC_CACHE_VAL(am_cv_proto_iconv, [
                     81:       AC_TRY_COMPILE([
                     82: #include <stdlib.h>
                     83: #include <iconv.h>
                     84: extern
                     85: #ifdef __cplusplus
                     86: "C"
                     87: #endif
                     88: #if defined(__STDC__) || defined(__cplusplus)
                     89: size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
                     90: #else
                     91: size_t iconv();
                     92: #endif
                     93: ], [], am_cv_proto_iconv_arg1="", am_cv_proto_iconv_arg1="const")
                     94:       am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
                     95:     am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
                     96:     AC_MSG_RESULT([$]{ac_t:-
                     97:          }[$]am_cv_proto_iconv)
                     98:     AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1,
                     99:       [Define as const if the declaration of iconv() needs const.])
                    100:   fi
                    101: ])