Transition Graal to Java 8

[Doug Simon]

On Apr 3, 2014, at 12:01 AM, Deneau, Tom <tom.deneau at amd.com> wrote:

> When I try mx eclipseformat -e /path/to/eclipse-4.4
> 
> I get a lot of messages like:
>   The Eclipse formatter failed to format xxx.java. Skip the file.
> 
> Is this still supposed to work?

It works with the patched[1] Eclipse 4.3 and Eclipse 4.4 I20140402-0100 on my machine. What exact version of Eclipse 4.4 are you using? I suspect it’s Eclipse 4.4M6 (which is not Java 8 enabled). The error message is unfortunately a bit useless.

-Doug

[1] https://wiki.eclipse.org/JDT/Eclipse_Java_8_Support_For_Kepler
[2] http://download.eclipse.org/eclipse/downloads/drops4/I20140402-0100/

> 
> -- Tom
> 
>> -----Original Message-----
>> From: graal-dev [mailto:graal-dev-bounces at openjdk.java.net] On Behalf Of
>> Doug Simon
>> Sent: Wednesday, March 26, 2014 5:53 PM
>> To: graal-dev at openjdk.java.net
>> Subject: Transition Graal to Java 8
>> 
>> The changeset[1] has just gone through that transitions the non-pure-
>> Truffle projects in the Graal repository to Java 1.8.
>> 
>> The recommended steps for transitioning a local workspace are:
>> 
>> 1. Ensure Eclipse is running on a 1.8 VM by editing eclipse.ini in the
>> Eclipse installation directory (Eclipse.app/Contents/MacOS/eclipse.ini
>> on Mac) to include these lines:
>> 
>> -vm
>> /path/to/jdk1.8.0/bin/java
>> 
>> or on a Mac:
>> 
>> -vm
>> /Library/Java/JavaVirtualMachines/jdk1.8.0.jdk/Contents/Home/jre/lib/ser
>> ver/libjvm.dylib
>> 
>> 
>> 2. Ensure you are using an Eclipse that has 1.8 support. This is one of
>> the following:
>> - Luna (4.4), version I20140318-0830 or later
>> - Kepler (4.3.2) with the patch at
>> http://download.eclipse.org/eclipse/updates/4.3-P-builds installed.
>>   Only select "Eclipse JDT (Java Development Tools) Patch with Java 8
>> support (for Kepler SR2)" unless
>>   you already have PDE installed.
>> 3. Configure the JavaSE-1.7 and JavaSE-1.8 Execution Environments
>> appropriately in Eclipse (Preferences -> Java -> Installed JREs ->
>> Execution Environments) 4. If you want to build with ECJ, then download
>> it[2] to mx/ecj.jar 5. Update mx/env so that JAVA_HOME points to the 1.8
>> JDK and add a property EXTRA_JAVA_HOMES to point to a 1.7 JDK.
>>   For example:
>> 
>> 
>> JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0.jdk/Contents/Home
>> 
>> EXTRA_JAVA_HOMES=/Library/Java/JavaVirtualMachines/jdk1.7.0_51.jdk/Conte
>> nts/Home
>> 
>> 6. Do a complete clean (just to be sure):
>> 
>> mx clean
>> mx ideclean
>> mx eclipseinit
>> 
>> 6. Remove and re-add all projects in Eclipse.
>> 
>> Note that it is not yet quite open season on using Java 8 language
>> features as Checkstyle does not yet support Java 8. In all likelihood we
>> will replace Checkstyle with error-prone[3]. Either way, Checkstyle will
>> be pulled out soon which removes the last road block to adopting all of
>> Java 8.
>> 
>> -Doug
>> 
>> [1] http://hg.openjdk.java.net/graal/graal/rev/a6c1c3eb20c4
>> [2] http://download.eclipse.org/eclipse/downloads/drops4/P20140317-
>> 1600/download.php?dropFile=ecj-P20140317-1600.jar
>> [3] https://code.google.com/p/error-prone/
>