Compiling Device IO

[Bob Vandette]

I noticed this problem as well but haven't had a chance to follow up on it.
The problem is definitely related to Java SE 7 and doesn't show up on Java SE 8.
We do want to be able to support the Device I/O APIs on Java SE 7 so
we'll be fixing this.

If you download the JDK 8 for ARM, you can work around the issue.  

The other issue that I noticed was the fact that we can't compile DIO on 64 bit
Linux platforms.  This is not our initial target but since this is a common development
platform, we need to fix our assumptions that pointers fit into a int.

Bob.


On Jun 20, 2014, at 10:43 AM, Dell Green <Dell.Green at ideaworks.co.uk> wrote:

> Hi Guys,
> 
> Just for interest sake i decided to try and compile Device I/O directly on my Raspberry Pi with Arch linux on it, as opposed to using the linaro cross compiler tools.
> 
> I used OpenJDK 1.7.0_60 and found a bug in Line 63 in the following java file.
> 
> src/se/classes/com/oracle/dio/utils/Configuration.java
> 
> /**
>     * Returns system property value by the given key using a privileged call.
>     *
>     * @param key property key
>     * @return property value
>     */
>    public static String getSystemProperty(String key) {
>        return AccessController.doPrivileged(new PrivilegedAction<String>() {
>                public String run() {
>                    return System.getProperty(key);
>                }
>            });
>    }
> 
> Javac failed due to the method argument should be final due to anonymous inner class usage. Once i changed this it all compiled great and your samples worked great.
> 
> Interestingly when i compiled it previously on my linux box with java 8 on it, it didn’t fail. Not sure why that was.
> 
> Dell Green
> R&D Software Manager
> t: (+44)203 668 9870
> 
> 
> ideaworks.co.uk
> 206 Great Portland Street
> London W1W 5QJ
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