RFR 8009517: Disable fatal compiler warning in the old build

[Jonathan Gibbons]

On 03/08/2013 08:09 AM, Mike Duigou wrote:
> On Mar 8 2013, at 07:56 , Alan Bateman wrote:
>
>> On 08/03/2013 15:49, Mike Duigou wrote:
>>> Looks fine to me. Do we have an issue open for restoring warnings to the new build?
>>>
>>> Mike
>>>
>> I don't know if there is an issue for that yet but as the new build compiles thousands of classes in a single compilation unit then it means we will need to make significant inroads on the warnings before more can be enabled. The approach with the old build was by area and good progress had been made but with the new build, then it may have to be by warning type as all areas are compiled together.
> Understood. Perhaps we can at least use JDK_FILTER incrementally. Do we have a way to override the warnings used by the makefile?
>
> Any thoughts towards perhaps disabling -Werror but enabling all of the warnings?
>
> Mike
>

A different and maybe more effective way of tracking this (for now) 
would be to generate a separate report on a regular basis that details 
the number of different types of warnings in each package. The 
technology to do that is easy; the hard part is getting people to 
monitor the results and fixup the issues.

That being said, it should be relatively uncontroversial to totally 
eliminate some types of warnings, like cast warnings, and enable those 
warnings in the build with -Werror.

-- Jon