[External] : Re: Building OpenJFX using the OpenJDK build system

[Kevin Rushforth]

On 9/28/2025 6:52 AM, Johan Vos wrote:
>
>
> On Sat, Sep 27, 2025 at 11:59 PM Kevin Rushforth 
> <kevin.rushforth at oracle.com> wrote:
> ...
>
>     Optionally, it could support linking those modules into the JDK. I
>     note that is already possible using jlink on the JMODs produce
>     above, but it could be more convenient to have support for direct
>     integration.
>
>
> I think the difference between this project and what is currently 
> possible using jlink is more than just convenience.
> When using jlink to create a JRE, there is no guarantee that the 
> modules are built in a consistent approach. Hence, it is possible to 
> have the core modules built against glibc 2.39 and the javafx modules 
> built against glibc 2.35.
> When building everything from the same build tools, we ensure that the 
> native libraries are very consistent with each other. It also makes 
> maintenance of OpenJFX easier, as we regularly update the minimum 
> requirements of some dependencies because they are updated in OpenJDK.

What I meant is that you could use this project to separately build the 
JDK and then JavaFX JMODs using the exact same toolchains and then use 
jlink to create a JDK with JavaFX modules. In that way, you would ensure 
consistency in building the native libs. However, as you point out below...

> The additional jlink step that is currently needed if one wants to 
> distribute a JRE with JavaFX requires "unpacking" 2 projects, mixing 
> some artifacts, and repackaging it. While the tools do this is are 
> really great, it is still more plumbing work than the case where the 
> `make images` is used when compiling the JDK and where the JavaFX 
> modules are immediately part of the image.

Yes, this is definitely easier and seems well worth supporting as a 
better way to build a JDK that includes JavaFX modules. And in addition 
to the repackaging, it would need to be signed (and on macOS notarized) 
again.

-- Kevin
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