(GCC) How can I hide "defined but not used" warnings in GCC?

2014-02-14 wcdj

May happy ending of love belong to every developer.

From: http://play.golang.org/p/xl1P6jYtIZ

Question:

How can I hide "defined but not used" warnings in GCC?

Answers:

Just saw this thread while searching for solutions to this problem. I post here for completeness the solution I found...

The GCC compiler flags that control unused warnings include:

-Wunused-function
-Wunused-label
-Wunused-parameter
-Wunused-value
-Wunused-variable
-Wunused (=all of the above)

Each of these has a corresponding negative form with "no-" inserted after the W which turns off the warning (in case it was turned on by -Wall, for example). Thus, in your case you should use

<pre name="code" class="html">-Wno-unused-function

Of course this works for the whole code, not just compile-time asserts. For function-specific behaviour, have a look atFunction
attributes.
处理办法：

GCC编译有一个参数-Wall，其实是包含其他许多的警告选项，如-Wunused, -Wformat等等。

假如我想使用-Wall选项，但会有许多函数定义未使用的提示，如何在使用-Wall参数的时候关闭-Wunused选项，请问有什么办法？

试试 -Wall -Wno-unused，我这里管用

stackoverflow:

http://stackoverflow.com/questions/386220/how-can-i-hide-defined-but-not-used-warnings-in-gcc