同时从两个变量自动生成 makefile 中的规则
我有一些搜索模式不太适合作为结果文件名的一部分。因此，我将正则表达式和相应的文件名部分拆分为两个不同的变量，如下所示。如何自动执行以下操作，以便我不必手动列出所有文件，也不必手动输入运行 grep 的规则？
SEARCH_RE = test a/b/c a.*b
SEARCH_FILE = test abc ab
ALL = result.test result.abc result.ab
all: $(ALL)
result.test:
grep test inputfile > result.test
result.abc:
grep a/b/c inputfile > result.abc
result.ab
grep a.*b inputfile > result.ab
I have some search patterns that fits poorly as part of a file name for the result. I therefore split the regular expression and the corresponding file name part into two different variables like below. How can I automate the following so that I do not have to manually list files for ALL and also do not have to manually enter the rules running grep?
SEARCH_RE = test a/b/c a.*b
SEARCH_FILE = test abc ab
ALL = result.test result.abc result.ab
all: $(ALL)
result.test:
grep test inputfile > result.test
result.abc:
grep a/b/c inputfile > result.abc
result.ab
grep a.*b inputfile > result.ab
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我建议
至于编写规则，我认为您想要的那种查找可以在 Make 中完成，但实际上不应该这样做——这将是一个可怕的混乱。我建议这样做：
result.test: TARG = test result.abc: TARG = a/b/c result.ab: TARG = a.*b $(ALL): grep $(TARG) inputfile > $@I recommend
As for writing the rules, the kind of lookup I think you want can be done in Make, but really shouldn't be-- it would be a horrible kludge. I'd suggest doing it this way:
result.test: TARG = test result.abc: TARG = a/b/c result.ab: TARG = a.*b $(ALL): grep $(TARG) inputfile > $@我不知道如何创建规则，但是
ALL目标很简单：I don't know how to create the rules, but the
ALLtarget is easy enough: