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thodg/libiconv/extras/iconv.m4

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  • Author : Bruno Haible
    Date : 2001-11-12 12:55:51
    Hash : 274ff204
    Message : Upgrade iconv.m4 to the one used by gettext-0.10.40.

  • extras/iconv.m4
  • #serial AM2
    
    dnl From Bruno Haible.
    
    AC_DEFUN([AM_ICONV],
    [
      dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
      dnl those with the standalone portable GNU libiconv installed).
    
      AC_ARG_WITH([libiconv-prefix],
    [  --with-libiconv-prefix=DIR  search for libiconv in DIR/include and DIR/lib], [
        for dir in `echo "$withval" | tr : ' '`; do
          if test -d $dir/include; then CPPFLAGS="$CPPFLAGS -I$dir/include"; fi
          if test -d $dir/lib; then LDFLAGS="$LDFLAGS -L$dir/lib"; fi
        done
       ])
    
      AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [
        am_cv_func_iconv="no, consider installing GNU libiconv"
        am_cv_lib_iconv=no
        AC_TRY_LINK([#include <stdlib.h>
    #include <iconv.h>],
          [iconv_t cd = iconv_open("","");
           iconv(cd,NULL,NULL,NULL,NULL);
           iconv_close(cd);],
          am_cv_func_iconv=yes)
        if test "$am_cv_func_iconv" != yes; then
          am_save_LIBS="$LIBS"
          LIBS="$LIBS -liconv"
          AC_TRY_LINK([#include <stdlib.h>
    #include <iconv.h>],
            [iconv_t cd = iconv_open("","");
             iconv(cd,NULL,NULL,NULL,NULL);
             iconv_close(cd);],
            am_cv_lib_iconv=yes
            am_cv_func_iconv=yes)
          LIBS="$am_save_LIBS"
        fi
      ])
      if test "$am_cv_func_iconv" = yes; then
        AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
        AC_MSG_CHECKING([for iconv declaration])
        AC_CACHE_VAL(am_cv_proto_iconv, [
          AC_TRY_COMPILE([
    #include <stdlib.h>
    #include <iconv.h>
    extern
    #ifdef __cplusplus
    "C"
    #endif
    #if defined(__STDC__) || defined(__cplusplus)
    size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
    #else
    size_t iconv();
    #endif
    ], [], am_cv_proto_iconv_arg1="", am_cv_proto_iconv_arg1="const")
          am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
        am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
        AC_MSG_RESULT([$]{ac_t:-
             }[$]am_cv_proto_iconv)
        AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1,
          [Define as const if the declaration of iconv() needs const.])
      fi
      LIBICONV=
      if test "$am_cv_lib_iconv" = yes; then
        LIBICONV="-liconv"
      fi
      AC_SUBST(LIBICONV)
    ])