-Werror for certain warnings?

-Werror for certain warnings?

[Erik]

"info:/gcc/Warning Options" mentions -Werror, that treats all warnings
as errors and -Werror-implicit-function-declaration, which treats
implicit function declarations as errors but it does not mention how to
treat other certain kinds of warnings as errors. For example
-Werror-shadow does not work. How is it supposed to be done?

Re: -Werror for certain warnings?

[John Love-Jensen]

Hi Erik,

> How is [treating specific warnings as errors] supposed to be done?

Enable just the warnings you want to be treated as errors and use the
-Werror switch.

I do not believe* there is the ability to promote specific warnings (other
than -Werror-implicit-function-declaration) to be treated as errors.

That would be a nice enhancement to GCC.

HTH,
--Eljay

* Always the possibility that I may be mistaken.

Re: -Werror for certain warnings?

[David Fang]

> > How is [treating specific warnings as errors] supposed to be done?
>
> Enable just the warnings you want to be treated as errors and use the
> -Werror switch.
>
> I do not believe* there is the ability to promote specific warnings (other
> than -Werror-implicit-function-declaration) to be treated as errors.
>
> That would be a nice enhancement to GCC.

Hi,
	It looks like it's implemented in 4.2.  [1]
	-Werror=blah (implies -Wblah)
	-Wno-error=blah (only guarantees not promoted to error)

[1] http://gcc.gnu.org/bugzilla//show_bug.cgi?id=29768
I know Erik is already CC'd on that PR, but for the benefit for anyone who
wanders across this thread...

> HTH,
> --Eljay
>
> * Always the possibility that I may be mistaken.

Fang