RFR: 8339783: Implement JEP 479: Remove the Windows 32-bit x86 Port [v13]

[Magnus Ihse Bursie]

On Wed, 30 Oct 2024 02:18:00 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Yes. As Julian says, it's something we set up in our builds:
>> 
>>   if test "x$FLAGS_CPU_BITS" = x64; then
>>     $1_DEFINES_CPU_JDK="${$1_DEFINES_CPU_JDK} -D_LP64=1"
>>     $1_DEFINES_CPU_JVM="${$1_DEFINES_CPU_JVM} -D_LP64=1"
>>   fi
>
> Ugghh! I was thrown by the `x` in test expressions and thought `x64` meant, well, x64 :)

Yeah, that idiom is indeed difficult to read. :-(

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PR Review Comment: https://git.openjdk.org/jdk/pull/21744#discussion_r1822342078