更好的tag和cscope的支持

从log上看都加了差不多快半年了，把 make tags 和 make cscope 的工作从原来的 Makefile 里面分离出来了，引用 commit 如下：

commit a680eedc6c621c75695c68198533fc3c98f4053b Author: Sam Ravnborg <[email protected]> Date:   Wed Dec 3 22:24:13 2008 +0100     tags and cscope support really belongs in a shell script     as they do not benefit from the make functionality.         Moving the support to a shell script has several benefits:     - The readability of the code has increased a lot     - More people is able to extend the tags support     - We see less changes to the top-level Makefile         The shell script version includes improvements from:     Alexey Dobriyan <[email protected]> (jump to kconfig symbols)     Alexey Dobriyan <[email protected]> (drop ./ in paths)     Ian Campbell <[email protected]> (simplified find algorithms)         This version has a few caveats:     => It does not support ALLSOURCE_ARCHS        - it is easy to add if it is really used     => It assumes all archs have moved to arch/$ARCH/include        - until that happens we have a few additional hits in the archs         Signed-off-by: Sam Ravnborg <[email protected]>     Cc: Alexey Dobriyan <[email protected]>     Tested-by: Ian Campbell <[email protected]>

实际使用起来，生成 tags 等的命令还是一样的，和原来没有差别，但是生成的 tag 和 cscope.out 就不一样了，从体验上来说，比原来好用的多了。

嗯。体验提升了，一定要赞。

此外，一直不晓得的用法也要备份一下：

$gvim -t just_for_fun

Hope that you won't go straight forward with above command.

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