X10 2.1.2 Release

Version 2.1.2 of X10 and X10DT are now available for download.

See the Release Notes for details on what is new in X10 2.1.2.


We no longer provide a separate Java-only build – the Java runtime is now platform-specific and is distributed as part of the platform download. The Cygwin/x86 Java runtime will run in single place mode on Windows, and does not require Cygwin installed.

  • Source Distribution of X10 2.1.2 Use this if you want to build X10 yourself, use X10 with CUDA, modify the X10 implementation, or need X10 for a platform that is not one of the ones for which we provide pre-built binaries.

Note that the source and testsuite are now distributed as a .tar.bz2 instead of a .zip.


  • Download the X10 2.1.2 distribution for your platform.
  • Untar it.
  • See the INSTALL file in the X10 2.1.2 directory tree for additional instructions.

Binary builds of the Common PGAS runtime that match the X10 2.1.2 release are available as separate binary downloads. Under most circumstances, you should not need to manually download the Common PGAS runtime yourself. It is included in the binary X10 releases and will be automatically downloaded by the X10 build process if you are building from source. Note that the only supported builds of PGAS are LAPI and BG/P.