RFR: 8290473: update Eclipse .classpath in apps, buildSrc [v2]

[Nir Lisker]

On Mon, 1 Aug 2022 19:30:28 GMT, Andy Goryachev <angorya at openjdk.org> wrote:

>> modules/javafx.graphics/.classpath line 5:
>> 
>>> 3: 	<classpathentry kind="src" path="src/main/java"/>
>>> 4: 	<classpathentry kind="src" path="build/gensrc/jsl-prism"/>
>>> 5: 	<classpathentry kind="src" path="build/gensrc/jsl-decora"/>
>> 
>> How do you not get errors on these on Mac/Linux if they are not declared optional?
>> 
>> Additionally, you need the hlsl folders as shown in the mailing list.
>
> As with any multi-stage project, we need to run 'gradle sdk' (or perhaps 'gradle sdk apps' for good measure) to build these directories.  Then, in Eclipse, clean all projects.  These steps produce a working configuration.
> 
> I do not see hlsl folders being build on Mac.  Are these being built on windows/linux?
> If these are platform-specific, then we should add them to the gradle build.  Maybe an additional target that creates the empty directories, and upon which sdk depends on.

As @kleopatra noted below, you need to add the hlsl folders that are built on Windows. Add them as an optional source to avoid errors on other OS's:

<classpathentry kind="src" path="build/hlsl/Prism">
	<attributes>
		<attribute name="ignore_optional_problems" value="true"/>
	</attributes>
</classpathentry>

And the same for
```<classpathentry kind="src" path="build/gensrc/jsl-prism"/>```
```<classpathentry kind="src" path="build/hlsl/Decora">```
```<classpathentry kind="src" path="build/gensrc/jsl-decora"/>```

This will allow to run dependent projects on Windows and won't cause build issues on other OS's as Eclipse ignores errors on these. There is no need to create empty folders. I tested both on Windows and Linux.

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PR: https://git.openjdk.org/jfx/pull/858