os.arch "amd64" or "x86_64"?

Kelly O'Hair kelly.ohair at oracle.com
Mon Feb 6 16:33:45 PST 2012

When you say don't change this, could you be clear what os.arch setting you want?

I'm advocating changing the existing code to use x86_64, so we match Apple's JDK6.


On Feb 6, 2012, at 4:05 PM, steve.x.northover at oracle.com wrote:

> Please don't change this.  People rely on values like this and you will break them -- guaranteed.
> Steve
> On 06/02/2012 6:07 PM, Scott Kovatch wrote:
>> On Feb 6, 2012, at 2:51 PM, Michael McMahon wrote:
>>> Following from the last message, I just want to get opinions on this question.
>>> Currently, the os.arch system property is set to "amd64" in common with the
>>> other platforms (solaris, windows and Linux) when running on an amd64/x86_64 CPU.
>>> However, the property is set to "x86_64" in Apple's Java 6 runtime.
>>> So, the question is, what/if any compatibility issues could there be, if we maintain
>>> this behavior? On the other hand there probably should be a good reason to change it
>>> so it's different from the other 64 bit platforms.
>> Web Start is the main area of compatibility that I know of. By changing it to 'amd64' developers would need to rev their JNLP files to handle the new value for os.arch on the Mac.
>> For bundled applications Apple supported per-architecture JVM options in the application's Info.plist, but developers will need to rebundle with JDK 7 anyway. It won't be an issue unless we need to support universal binaries for non-Oracle-provided JDK distributions.
>> -- Scott K.

More information about the macosx-port-dev mailing list