RFR: 8365579: ml64.exe is not the right assembler for Windows aarch64 [v2]

[Julian Waters]

On Fri, 15 Aug 2025 15:43:45 GMT, Saint Wesonga <duke at openjdk.org> wrote:

>> make/common/native/CompileFile.gmk line 239:
>> 
>>> 237: 	    $$(call ExecuteWithLog, $$@, $$(call MakeCommandRelative, \
>>> 238: 	        $$($1_COMPILER) $$($1_FLAGS) \
>>> 239: 	        $(CC_OUT_OPTION)$$($1_OBJ) $$($1_SRC_FILE))) \
>> 
>> Have you verified that removing `-Ta` works for the x86 assembler?
>
>> Have you verified that removing `-Ta` works for the x86 assembler?
> 
> Yes, both of these command lines work:
> 
> 
> ; "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Tools\MSVC\14.44.35207\bin\Hostx64\x86\ml.exe" -nologo -c -Fo test_x86_assembler.obj -Ta test_x86_assembler.S
> ; "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Tools\MSVC\14.44.35207\bin\Hostx64\x86\ml.exe" -nologo -c -Fo test_x86_assembler.obj test_x86_assembler.S
> 
> TEST_SEG   SEGMENT
> 
>    mov eax, ecx
> 
> TEST_SEG   ENDS
> 
> END

I wonder why we still have the assembler for 32 bit, as the JDK no longer supports 32 bit Windows ever since Magnus nuked it from the codebase

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PR Review Comment: https://git.openjdk.org/jdk/pull/26791#discussion_r2279458499