AC_C_INLINE
AC_PROG_INSTALL
AC_HEADER_STDC
-AC_CHECK_HEADERS(unistd.h locale.h sys/ioctl.h)
+AC_CHECK_HEADERS(unistd.h locale.h sys/ioctl.h iconv.h)
AC_CHECK_HEADER(stdarg.h,AC_DEFINE(HAVE_STDARG_H, 1, [Define if you have the <stdarg.h> header file.]),AC_MSG_ERROR([*** stdarg.h is missing on your system ***]))
AC_FUNC_STRCOLL
AC_CHECK_FUNCS(setlocale)