通过隐式规则递归破坏SECONDEXPANSION？

Question

我想使用.SECONDEXPANSION：如http://make.mad-scientist.net/secondary-expansion所述。我有以下makefile：

.SECONDEXPANSION:

x.deps := y.foo

%.foo:  $$($$*.deps)
    echo $@

不幸的是，当我尝试make x.foo时，我得到了

make: *** No rule to make target `.foo'.  Stop.

使用-Rd运行它，我得

GNU Make 3.81
Copyright (C) 2006  Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.

This program built for x86_64-pc-linux-gnu
Reading makefiles...
[...]
Updating goal targets....
Considering target file `x.foo'.
 File `x.foo' does not exist.
 Looking for an implicit rule for `x.foo'.
 Trying pattern rule with stem `x'.
 Trying rule prerequisite `y.foo'.
 Trying pattern rule with stem `x'.
 Trying rule prerequisite `y.foo'.
 Looking for a rule with intermediate file `y.foo'.
  Avoiding implicit rule recursion.
 No implicit rule found for `x.foo'.
 Finished prerequisites of target file `x.foo'.
Must remake target `x.foo'.
make: *** No rule to make target `x.foo'.  Stop.

我认为它不起作用，因为根据文档，＆＃34;没有一个隐含规则可以在链中出现多次。＆＃34;但这正是我所需要的 - 让x.foo解析为y.foo，它解析为没有依赖关系的规则。我的应用程序需要统一（* .foo）命名方案。任何人都可以提出解决方案吗？不幸的是，顺便说一句，我必须使用make 3.81，而不是更近期的东西。