On Mon, 8 Sep 2025 14:25:02 GMT, Julian Waters <[email protected]> wrote:

>> 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/java.desktop/windows/native/libawt/windows/awt_Component.cpp:3560:39:
>>  warning: '_VKS_ALT_MASK' defined but not used [-Wunused-const-variable=]
>>  3560 |                     static const UINT _VKS_ALT_MASK = 0x04;
>>       |                                       ^~~~~~~~~~~~~
>> C:/users/vertig0/downloads/eclipse-committers-2023-12-r-win32-x86_64/workspace/jdk/src/java.desktop/windows/native/libawt/windows/awt_Font.cpp:
>>  In member function 'void CSegTable::MakeTable()':
>> C:/users/vertig0/downloads/eclipse-committers-2023-12-r-win32-x86_64/workspace/jdk/src/java.desktop/windows/native/libawt/windows/awt_Font.cpp:1361:14:
>>  warning: typedef 'PSUBTABLE' locally defined but not used 
>> [-Wunused-local-typedefs]
>>  1361 | } SUBTABLE, *PSUBTABLE;
>>       |              ^~~~~~~~~
>> C:/users/vertig0/downloads/eclipse-committers-2023-12-r-win32-x86_64/workspace/jdk/src/java.desktop/windows/native/libawt/windows/awt_Font.cpp:
>>  In member function 'virtual void CEUDCSegTable::Create(LPCWSTR)':
>> C:/users/vertig0/downloads/eclipse-committers-2023-12-r-win32-x86_64/workspace/jdk/src/java.desktop/windows/native/libawt/windows/awt_Font.cpp:1588:10:
>>  warning: typedef 'PHEAD' locally defined but not used 
>> [-Wunused-local-typedefs]
>>  1588 | } HEAD, *PHEAD;
>>       |          ^~~~~
>> C:/users/vertig0/downloads/eclipse-committers-2023-12-r-win32-x86_64/workspace/jdk/src/java.desktop/windows/native/libawt/windows/awt_Font.cpp:1595:11:
>>  warning: typedef 'PENTRY' locally defined but not used 
>> [-Wunused-local-typedefs]
>>  1595 | } ENTRY, *PENTRY;
>>       |           ^~~~~~
>> C:/users/vertig0/downloads/eclipse-committers-2023-12-r-win32-x86_64/w...
>
> Julian Waters has updated the pull request with a new target base due to a 
> merge or a rebase. The incremental webrev excludes the unrelated changes 
> brought in by the merge/rebase. The pull request contains two additional 
> commits since the last revision:
> 
>  - Merge branch 'openjdk:master' into awt
>  - 8342869

I'll remove the core-libs label from this PR. This looks like a purely client 
libs area change.

make/modules/java.base/Lib.gmk line 197:

> 195:       LINK_TYPE := C++, \
> 196:       OPTIMIZATION := HIGH, \
> 197:       CXXFLAGS := -std=c++17, \

Hello Julian, is this removal of `-std=c++17` an oversight?

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

PR Comment: https://git.openjdk.org/jdk/pull/21655#issuecomment-4505016909
PR Review Comment: https://git.openjdk.org/jdk/pull/21655#discussion_r3278797230

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