7.17 '.desc SYMBOL, ABS-EXPRESSION' =================================== This directive sets the descriptor of the symbol (Symbol Attributes) to the low 16 bits of an absolute expression. The '.desc' directive is not available when 'as' is configured for COFF output; it is only for 'a.out' or 'b.out' object format. For the sake of compatibility, 'as' accepts it, but produces no output, when configured for COFF.