Version 2.1.0 of X10 and X10DT are now available for download.  See the Release Notes for details on what is new in X10 2.1.0.   Also new in X10 2.1.0 is preliminary support for compiling an X10 subset to CUDA.


  • X10 2.1.0 Language Specification
  • Source Distribution of X10 2.1.0 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.


  • Download the X10 2.1.0 distribution for your platform.
  • Untar it.
  • See the INSTALL file in the X10 2.1.0 directory tree for additional instructions.

Binary builds of the Common PGAS runtime that match the X10 2.1.0 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.


On some MacOS configurations, running an executable on multiple places with launcher/manager fails with error:   "could not lookup DNS configuration info service: (ipc/send) invalid destination port."

This can be resolved by running as root:

echo `hostname` >> /etc/hosts