|Author:||Tully Foote <tfoote at willowgarage.com>, Ken Conley <kwc at willowgarage.com>|
This REP defines target platforms for each ROS Distribution Release. We define platforms to include both operating system releases (e.g. Ubuntu Lucid (10.04 LTS)) as well as major language releases (e.g. Python 2.6). The target platforms represent the set on which all core stacks are expected to work. Exceptions can be made for stacks that are intentionally platform-specific.
If planned support for a target platform is changed, notice will be sent to ros-developers to enable discussion of this issue.
This document is provided to help plan future development for libraries. The primary platforms for ROS are Canonical's Ubuntu releases, and our intent is to track these releases as best as possible while also allowing for current, thirdparty libraries to be used.
Target platforms for future releases are speculative and are based on consulting Ubuntu's release and end-of-life schedule .
These targets are based on the Distribution Timeline to meet minimum requirements. 
We use the C++03 (ISO/IEC 14882:2003) standard, and are compiler-agnostic. While we mainly develop with gcc, no use of compiler-specific features is allowed without proper use of macros to allow use on other platforms.
Use of C++[0|1]x or tr1 features are only allowed if support for that feature is checked at compile time, and equivalent functionality exists without requiring C++[0|1]x code. A wholesale jump to C++[0|1]x will not happen until all commonly used OS platforms fully support it.
For a given release we allow use of Boost libraries that match the version provided in our low-water-mark Ubuntu version.
We use Steel Bank Common Lisp as our ANSI Common Lisp implementation. We are currently tracking SBCL 1.0.38 and will track future updates in the 1.0.x series as appropriate.
Our intent with Python is to track the minimum version provided in the supported Ubuntu platforms, as well as survey other commonly used OS platforms that support ROS to determine a reasonable minimum target.
Ubuntu has announced plans to release 14.04 in April 2014 with Python 3 as its default interpreter. Some ROS infrastructure and core scripts already work with Python 3 since Groovy. But, it remains difficult to set up a test environment so ROS package developers can also port to Python 3.
The preferred migration strategy is to support both Python 2.7 and Python >= 3.2 in each source script. Supporting any version earlier than 2.6 makes that task harder. Python 3.0 and 3.1 will probably never be supported explicitly, although some things may work.
Core stacks are required to comply with the target platforms listed here, though exceptions can be granted for core stacks that are inherently platform-specific. The set of core stacks is currently defined by variants included with each ROS distribution release.
This REP applies to stacks in the base variant for C Turtle.
And thirdly, the code is more what you'd call "guidelines" than actual rules...
We hope that ROS stack maintainers will make every effort to comply with the target platforms within this REP, but we recognize that ROS stacks represent a spectrum of development, from research prototypes to hardened libraries. There are also cases where supporting target platforms may incur unnecessary effort, such as a set of drivers for a specific robot platform.
|||Ubuntu Releases with End-of-Life Dates (https://wiki.ubuntu.com/Releases)|
|||REP 108, ROS Diamondback Variants (http://www.ros.org/reps/rep-0108.html)|
|||Distribution Timeline (http://wiki.ros.org/Distributions/Timeline)|
This document has been placed in the public domain.