RFR: 8292818: replace 96-bit representation for field metadata with variable-sized streams [v4]

[Frederic Parain]

On Tue, 14 Mar 2023 15:11:36 GMT, Doug Simon <dnsimon at openjdk.org> wrote:

>> Without this declaration, builds fail on Windows with this error:
>> `error C2375: 'c2v_getDeclaredFieldsInfo': redefinition; different linkage`
>
> Strange - thats not needed for other `JVMCIEnv` methods called from `jvmciCompilerToVM.cpp`. There must be some way to avoid this.

The issue was caused by the `friend` declaration below (I cannot remember why I added in the first place), which seems to add an implicit declaration of the method that was conflicting with the original declaration of the method. Once the `friend` declaration is removed, builds on Windows don't need the `extern` declaration anymore.

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

PR: https://git.openjdk.org/jdk/pull/12855