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gcc -W警告标志

[英]gcc -W warning flags

I'm learning C and in some examples I found "use gcc -W to enable warnings", 我正在学习C,在某些例子中,我发现“使用gcc -W来启用警告”,

but reading the documentation here : http://gcc.gnu.org/onlinedocs/gcc-4.6.3/gcc/Warning-Options.html 但请阅读此处的文档: http//gcc.gnu.org/onlinedocs/gcc-4.6.3/gcc/Warning-Options.html

I can't find what -W do. 我找不到-W做什么。

Can someone explain ? 谁能解释一下?

I'm speaking about W and not w. 我说的是W而不是w。

Regards, 问候,

-W is now deprecated by -Wextra with new gcc versions. -Wextra现在已弃用-W并使用新的gcc版本。

From gcc man page: 来自gcc手册页:

   -Wextra
       This enables some extra warning flags that are not enabled by -Wall.
       (This option used to be called -W.  The older name is still supported, but
       the newer name is more descriptive.)

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