Graal instructions for Eclipse + Checkstyle + Java7

[Doug Simon]

Hi Raffaello,

> On 22 Jan 2016, at 19:30, Raffaello Giulietti <raffaello.giulietti at supsi.ch> wrote:
> 
> Hi,
> 
> the Graal instructions for Eclipse
> (https://wiki.openjdk.java.net/display/Graal/Eclipse) explain how to
> import the projects in the $GRAAL folder into Eclipse (I think it is
> denoted as the primary suite in mx terms).
> 
> However, they fail to mention that the sibling folders $GRAAL/../jvmci
> and $GRAAL/../truffle should also be imported in the same vein.
> Otherwise, Eclipse complains about 1000 and more missing dependencies.

The instructions state:

"3. Enter the parent of the $GRAAL directory in the Select root directory field"

Note that it’s the *parent* of $GRAAL you need to select. The Eclipse import wizard will then see all the projects from siblings suites.

> 
> Further, if the Checkstyle plugin is installed in Eclipse, it complains
> about redundant private modifiers on many classes and marks them as
> errors. Since Checkstyle is specified as builder in the meta-information
> generated by "mx eclipseinit"
> * it should be dropped from there (short-term quick'n'dirty solution)
> * or the source code of the "misbehaving" classes be corrected
> appropriately (mid-term clean solution)

We are currently fixing these warnings. You can simply disable the Checkstyle Eclipse plugin until they are fixed. Problems like this with the Checkstyle Eclips plugin is why we removed it as a suggested plugin for Graal development a while ago.

> Finally, many Truffle projects still specify JavaSE-1.7 in their build
> path. Eclipse signals these as warnings if Java 7 is not installed on
> the system.

Sorry, there’s not much that can be done that until Truffle changes its Java compliance level.

-Doug