禁用 GCC 中的特定警告 [英] Disable specific warnings in GCC

问题描述

在 Microsoft 编译器上，可以使用 #pragma 禁用特定警告，而不会禁用其他警告.如果编译器对必须完成"的事情发出警告，这是一个非常有用的功能.

On Microsoft compilers, specific warnings can be disabled with a #pragma, without disabling other warnings. This is an extremely useful feature if the compiler warns over something that "has to be done".

此时的 GCC 是否有类似的功能?这似乎是一个足够明显的功能，令人难以想象的是它还没有此功能，但网络上的旧信息表明此功能不存在.

Does GCC at this point have a similar feature? It seems like an obvious enough feature that it’s unimaginable that it wouldn't have this feature yet, but older information on the web suggests this feature doesn't exist.

在 GCC 中使用什么?

What is one to use in GCC?

特别是，我喜欢使用多字符常量，比如abc".这些有效地评估为基数 256 数字 - 一个非常方便的功能，但它会触发警告.在case语句中切换四个字符串非常方便.

Specifically, I like to use multi-character constants, like 'abc'. These evaluate effectively as a base 256 number - a very handy feature, but it triggers a warning. It’s very handy for switching on four character strings in a case statement.

推荐答案

来自 GCC 手册:

许多选项都有以 -f 或 -W 开头的长名称---例如，-fforce-mem、-fstrength-reduce、-Wformat 等等.这些大部分都有积极和消极的形式；-ffoo 的否定形式是-fno-foo.本手册仅记录了这两种形式中的一种，以一个不是默认值.

Many options have long names starting with -f or with -W---for example, -fforce-mem, -fstrength-reduce, -Wformat and so on. Most of these have both positive and negative forms; the negative form of -ffoo would be -fno-foo. This manual documents only one of these two forms, whichever one is not the default.

但如果你问是否有源级警告禁用，我不知道 GCC 中是否存在该功能.

But if you're asking whether there is a source-level warning disable, I'm not aware if that feature exists in GCC.

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