We're very happy to announce that X10 and X10DT 2.3.1 are now available for
download at http://x10-lang.org/releases/x10-release-231
The release notes are appended.
Release 2.3.1
MAJOR CHANGES
No major changes were made in the X10 language
specification and implementation in this release.
Please consult the language specification for the details of
any minor language changes and specification clarifications made in
this release.
LIMITATIONS OF THIS RELEASE
The following features described in the 2.3 language manual do not
currently work and may be fixed in the subsequent releases:
- Non-static type definitions as class or interface members
(static type defs do work)
The constraint solver used by X10 typechecker is known to be incomplete
for situations in which a constraint implies an infinite number of
distinct constraints.
Additionally, the following features described in the language
manual do not currently work with Native X10.
- Garbage collection on AIX
- Non-final generic instance methods
- Exception stack traces on Cygwin
Although greatly improved from previous releases, the X10 runtime
still uses a modified "busy wait" loop in the worker threads that
execute asyncs. A consequence of this is that even if a Place has
no asyncs to execute, one worker thread in the Place will still consume
CPU cycles busy waiting for messages to arrive from the network.
The generated C++ code requires g++ 4.2 or better to be compiled;
we do almost all of our testing against g++ 4.4.
+ On AIX and Power/Linux, you may either use g++ 4.2 or better or
xlC 10.1.0.4 or better.
+ Some versions of Xcode on MacOS default to using the Clang C++
front-end; Clang cannot compile the generated C++ code; you need to
use the g++ front-end. To do this export CC=gcc; CXX=g++.
SUMMARY OF ISSUES RESOLVED IN THIS RELEASE
Below is a summary of JIRA issues addressed for the X10 2.3.1
Release Notes - X10 - Version X10 2.3.1
** New Features and Improvements
* [XTENLANG-2069] - Implement Team API for Managed X10
* [XTENLANG-3145] - Need a way to configure machines with multiple IP
addresses
* [XTENLANG-3165] - Eliminate requirement to preload all X10 classes by
Managed X10
** Bug
* [XTENLANG-2793] - Fallback path in pure Java for forceSinglePlace not
available in some Team methods (KMean
sSPMD)
* [XTENLANG-3140] - Exception checking fails if the methods of a class
are in the wrong order
* [XTENLANG-3143] - Compiler not allowing a method override when there
is a simple subtyping constraint
* [XTENLANG-3144] - Generic overridden overloaded method with parameter
does not match with superclass method
* [XTENLANG-3159] - CUDA broken on 2.3 release (X10RT: async 72 is not
a CUDA kernel)
* [XTENLANG-3163] - Failure to generate dynamic constraint check on
access to global reference
** Task
* [XTENLANG-3142] - Synchronize languagespec testcases with language
spec document
* [XTENLANG-3160] - Use balanced gc policy for IBM Java 7 64bit
For the details of JIRA issues fixed in this release, see
http://jira.codehaus.org/secure/ReleaseNote.jspa?projectId=11812&version=18657:
Please use the X10 JIRA to report bugs, after ensuring the problem is
not already reported:
http://jira.codehaus.org/secure/IssueNavigator.jspa?reset=true&&pid=11812&resolution=-1------------------------------------------------------------------------------
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