Disabling JVM features like for example jvmci or cds

[Kim Barrett]

On 11/6/24 6:46 AM, Baesken, Matthias wrote:
>
> Hi, I wanted to try to build a JVM on Linux x86_64 with JVMCI disabled 
> (just to check how the JVM behaves in a test).
>
> The configure help output shows a long  list how to enable those features
>
> --enable-jvm-feature-cds
>
> enable jvm feature 'cds' (enable class data sharing (CDS))
>
> [...]
>
> For disabling it seems the syntax  --enable-jvm-feature-jvmci=no  
> seems to work .
>
> Looking into make/autoconf/jvm-features.m4  this seems to be true for 
> all  JVM features .
>
> Should we add this to the help output  ?
>
> Would be useful to have some sentence like  
> --enable-jvm-feature-<name>=no can be used to disable a JVM feature .
>
> Should we add this to the configure help  ?
>
I think `--disable-xxx` is the more usual autoconf way.  Though 
expecting users to just know that doesn't seem right, so having the help 
text say something about it seems like a good idea.  But the relevant 
help text is probably (mostly?) automatically generated by the built-in 
autoconf tooling.

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