> After 8339120, gcc began catching many different instances of unused code in 
> the Windows specific codebase. Some of these seem to be bugs. I've taken the 
> effort to mark out all the relevant globals and locals that trigger the 
> unused warnings and addressed all of them by commenting out the code as 
> appropriate. I am confident that in many cases this simplistic approach of 
> commenting out code does not fix the underlying issue, and the warning 
> actually found a bug that should be fixed. In these instances, I will be 
> aiming to fix these bugs with help from reviewers, so I recommend anyone 
> reviewing who knows more about the code than I do to see whether there is 
> indeed a bug that needs fixing in a different way than what I did
> 
> build.log on release configuration:
> 
> C:/users/vertig0/downloads/eclipse-committers-2023-12-r-win32-x86_64/workspace/jdk/src/jdk.accessibility/windows/native/jabswitch/jabswitch.cpp:
>  In function 'int regEnable()':
> C:/users/vertig0/downloads/eclipse-committers-2023-12-r-win32-x86_64/workspace/jdk/src/jdk.accessibility/windows/native/jabswitch/jabswitch.cpp:334:14:
>  warning: unused variable 'freeData' [-Wunused-variable]
>   334 |         bool freeData = false;
>       |              ^~~~~~~~
> C:/users/vertig0/downloads/eclipse-committers-2023-12-r-win32-x86_64/workspace/jdk/src/jdk.accessibility/windows/native/jabswitch/jabswitch.cpp:326:11:
>  warning: unused variable 'retval' [-Wunused-variable]
>   326 |     DWORD retval = -1;
>       |           ^~~~~~
> C:/users/vertig0/downloads/eclipse-committers-2023-12-r-win32-x86_64/workspace/jdk/src/jdk.accessibility/windows/native/jabswitch/jabswitch.cpp:
>  In function 'int regDeleteValue(HKEY, LPCWSTR)':
> C:/users/vertig0/downloads/eclipse-committers-2023-12-r-win32-x86_64/workspace/jdk/src/jdk.accessibility/windows/native/jabswitch/jabswitch.cpp:379:14:
>  warning: unused variable 'freeData' [-Wunused-variable]
>   379 |         bool freeData = false;
>       |              ^~~~~~~~
> C:/users/vertig0/downloads/eclipse-committers-2023-12-r-win32-x86_64/workspace/jdk/src/jdk.accessibility/windows/native/jabswitch/jabswitch.cpp:367:11:
>  warning: unused variable 'retval' [-Wunused-variable]
>   367 |     DWORD retval = -1;
>       |           ^~~~~~
> C:/users/vertig0/downloads/eclipse-committers-2023-12-r-win32-x86_64/workspace/jdk/src/jdk.accessibility/windows/native/bridge/AccessBridgeCalls.c:
>  In function 'shutdownAccessBridge':
> C:/users/vertig0/downloads/eclipse-committers-2023-12-r-win32-x86_64/workspace/jdk/src/jdk.accessibi...

Julian Waters has updated the pull request incrementally with two additional 
commits since the last revision:

 - Typo in AccessBridgeCalls.c
 - Fix AccessBridgeCalls.c

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/21656/files
  - new: https://git.openjdk.org/jdk/pull/21656/files/f975dfa2..47b168a3

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21656&range=05
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21656&range=04-05

  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/21656.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21656/head:pull/21656

PR: https://git.openjdk.org/jdk/pull/21656

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