AC_SYS_LARGEFILE
AC_FUNC_FSEEKO
-AC_CHECK_FUNCS([gettimeofday nl_langinfo strdup])
+AC_CHECK_FUNCS([sigaction gettimeofday nl_langinfo strdup _vscprintf])
AC_CHECK_FUNC(getopt_long)
AM_CONDITIONAL([FDK_NO_GETOPT_LONG],[test "$ac_cv_func_getopt_long" != "yes"])
AC_SEARCH_LIBS([aacEncOpen],[fdk-aac],[],[],[])