使用 CVS #ifdef 我的更改

发布于 2024-08-12 11:14:46 字数 448 浏览 3 评论 0原文

我有一个大型项目，有许多更改尚未签入。我想签入它们，但只有当某个符号被 #define'd 时它们才会生效

CVS 确实能够使用 - 插入 #ifdef 来格式化差异-ifdef 参数。但是，这不会将 #ifdef 合并回我的工作文件中。更糟糕的是，输出包含一些需要删除的丑陋的标头内容。

Index: path/to/my/file.h,v
===================================================================
RCS file: /path/to/my/file.h,v
retrieving revision 1.17
diff --ifdef=TEST -r1.17 file.h

有没有人有一个脚本可以自动执行 CVS diff、删除标头内容并将结果复制回工作文件的过程？

如果有人可以提供帮助，非常感谢。

原文

I have a large project that has many changes not yet checked in. I want to check them in but have them only take effect when a certain symbol is #define'd

CVS does have the ability to format diffs with #ifdef's inserted using the --ifdef argument. However, this does not merge the #ifdef's back into my working file. Even worse, the output includes some ugly header stuff that would need to be removed.

Index: path/to/my/file.h,v
===================================================================
RCS file: /path/to/my/file.h,v
retrieving revision 1.17
diff --ifdef=TEST -r1.17 file.h

Does anyone have a script that would automate the process of doing the CVS diff, removing the header stuff and copying the result back over the working file?

Great thanks if anyone can help.

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絕版丫頭 2024-08-19 11:14:46

我不确定我明白你想要做什么，所以我会回答一个稍微修改过的问题，以防它使你当前的问题过时。

一般来说，#ifdef 仅在编译时设置时才启用。即使它们被签出或签入，除非编译时符号可用，否则宏内的代码也不会被包含。例如：

#ifdef DEBUG
cerr << "Some debug statement" << endl;
#endif

除非您在代码中的其他位置设置了 -DDEBUG 选项（在 GCC 中，请参阅编译器的文档）或 #define DEBUG 1（可用于 #ifdef)，上面的调试语句不会被编译到生成的二进制文件中。

话虽这么说，大量使用 #ifdef 很快就会成为维护黑洞，并使代码更难以移植。我建议不要采取这样的策略。

I'm not sure I understand what you are wanting to do, so I will answer a slightly modified question in case it makes your current problem obsolete.

Generally, #ifdef are only enabled if set at compile time. Even if they are checked out or checked in, the code within the macro will not be included unless a compile time symbol is available. For example:

#ifdef DEBUG
cerr << "Some debug statement" << endl;
#endif

Unless you set a -DDEBUG option (in GCC, see your compiler's documenation) or #define DEBUG 1 somewhere else in your code (that is available to the #ifdef), the debug statement above will not be compiled into the resulting binary.

That being said, heavy use of #ifdef can quickly become a maintanence blackhole and make it more difficult for your code to be portable. I would recommend against such a strategy.

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