Re: [cross-project-issues-dev] Gotchas Building Against Eclipse 4.20

[Ed Willink]

Hi

You may also find https://bugs.eclipse.org/bugs/show_bug.cgi?id=569379 
relevant if you move on from an old Tycho to avoid IPlatformRunnable.


It would appear that something in the auto-POM logic ignores the 
MANIFEST.MF BREE and instead picks one from an explicit pom.xml BREE so 
avoid vintage BREEs in test plugins.


Inconsistent org.eclipse.jdt.core.prefs between plugins can also be a 
problem. Maybe OOMPH can avoid this.


If you  use JDT's @NonNull annotations it is essential that you set 
deriveReleaseCompilerArgumentFromTargetLevel false.


    Regards

        Ed Willink


On 19/03/2021 08:33, Wim Jongman wrote:

Thanks, Ed! I was just starting to convert some builds to 4.20.

On Fri, Mar 19, 2021 at 9:17 AM Ed Merks > wrote:



BREE 1.6  and when I moved them to BREE 1.8, that magically
avoided the
Tycho compile errors.  Probably others won't have such a problem, but
maybe good to keep in mind.


Maybe: https://bugs.eclipse.org/bugs/show_bug.cgi?id=561363 



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Re: [cross-project-issues-dev] Gotchas Building Against Eclipse 4.20

[Wim Jongman]

Thanks, Ed! I was just starting to convert some builds to 4.20.

On Fri, Mar 19, 2021 at 9:17 AM Ed Merks  wrote:

>
> BREE 1.6  and when I moved them to BREE 1.8, that magically avoided the
> Tycho compile errors.  Probably others won't have such a problem, but
> maybe good to keep in mind.
>

Maybe: https://bugs.eclipse.org/bugs/show_bug.cgi?id=561363
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[cross-project-issues-dev] Gotchas Building Against Eclipse 4.20

[Ed Merks]

FYI,

So that others can short-circuit problems they're likely to have (may 
have) building against Eclipse 4.20, take note that IPlatformRunnable 
has now been removed, but Tycho Surefire <= 2.0.0 Surefire uses it (even 
though it's deprecated since 2006). There isn't much in the way of 
diagnosis why the Surefire test launches fail; you have to look in the 
*.log to see the class load failure is the cause.  As such, if your 
tests suddenly don't launch when building against 4.20, this most likely 
why.


I'm not sure about the state of Tycho 2.1.0; I switched to 2.2.0 for 
EMF's build to be able to launch tests.  Unfortunately with 2.2.0 I 
could not build certain of my Xcore plugins (strange "inconsistent class 
hierarchy" errors); it turned about that these failing bundles all had 
BREE 1.6  and when I moved them to BREE 1.8, that magically avoided the 
Tycho compile errors.  Probably others won't have such a problem, but 
maybe good to keep in mind.


Another issue is that there is a newer major version of Jetty in 4.20,  
(10.0.1 versus 9.4.27) so I cannot build Oomph until USS SDK provides a 
new build that does not exclude Jetty 10.x:


https://bugs.eclipse.org/bugs/show_bug.cgi?id=572026

Good luck building against 4.20.  Hopefully you can avoid the time 
consuming pitfalls.


Regards,
Ed


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