Chandra X-Ray Observatory
	(CXC)
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Last modified: 13 November 2018

URL: http://cxc.harvard.edu/ciao/download/platforms.html

Platform Support


[IMPORTANT]
Python 2.7 vs. Python 3.5

By default, users will install the CIAO 4.10 pre-built binary distributions with Python 3.5. However, there are separate pre-built binary distributions available which use Python 2.7. The CIAO 4.10 Python 2.7 builds are provided as a legacy release to assist users in the eventual transition to Python 3.5. The system requirements are the same for both distributions.

The reason for moving to Python 3 is that the support for Python 2.7 is ending in 2020, and so many of the main scientific packages are also ending support for this version at the same time.

[IMPORTANT]
End of Support: 32bit Linux and OSX 10.9 (Mavericks) & earlier.

CIAO 4.7 was the last CIAO release on 32bit Linux and OSX 10.6.8/10.7/10.8.

Some older versions of 64bit Linux can only run the 32bit binaries. This includes CentOS 5. These users will need to upgrade to be able to use the current version of CIAO.

[IMPORTANT]
macOS Mojave

[New] (13 Nov 2018) The CXC has done some limited testing of CIAO 4.10 on macOS Mojave. While no new issues have been identified, users should be vigilant and pay extra attention to any unexpected error or warning messages.

CIAO 4.10 is available as precompiled binaries for the following platforms:

Linux 64 bit

The Linux64 builds are done on a CentOS 6.8 machine and have been fully tested on CentOS 6 and Fedora 25+. The Linux64 build will not work on some older Linux operating systems, including CentOS 5 and earlier versions of Fedora. Linux users may need to install the ncurses5 compatibility package using their Linux distribution's package manager.

CIAO 4.10 does not run on standard installations of:

  • Any 32 bit Linux
  • Cent OS5
  • RHEL version 5 or lower
  • Slackware Linux (missing SELinux system library)

This is the default Linux distribution and will be installed automatically on all non-Ubuntu based distributions. The following is a short list of distributions where it will be installed: Fedora, RedHat, CentOS, ScientificLinux, openSUSE, and Mageia.


Linux Ubuntu

The Ubuntu build of CIAO, LinuxU, was built on an Ubuntu 14.04 LTS machine. It will be automatically selected for Ubuntu distributions (14.04LTS, 16.04LTS, and 17.10) as well as for distributions derived from Ubuntu such as LinuxMint 17 and LinuxMint18.

[IMPORTANT]
Windows Subsystem of Linux (WSL)

CIAO is not supported using any Linux distribution running under the Windows Subsystem for Linux (WSL). The CXC has not done any testing with this configuration.

Mac OS X, 64 bit

There are 3 binary releases for Apple, one for each OSX 10.10 (Yosemite), OSX 10.11 (ElCapitan), and macOS 10.12 (Sierra). macOS High Sierra should install the binaries for macOS Sierra.

CIAO 4.10 does not run on:

  • Mac OS X 10.9 and lower
  • Mac PowerPC
  • Mac 32bit

X11 System Libraries

CIAO requires several X11 related system libraries to be installed. These are usually already installed on most end-user Linux machines; however, they are frequently omitted when running on "headless" clusters and Apple users need to install XQuartz separately.

Users are responsible for installing them via the package manager (e.g. yum, fink).

The names may differ slightly but here are the known packages:

  • X11
  • GL libs (Open GL or Mesa)
  • curses
  • libm
  • C libraries
  • C++ libraries
  • libz
  • pthread
  • crypt

Doing an ldd on our executables and libraries will produce a list something like the following list of system libaries that will either be located in /lib or /usr/lib.

libncurses.so.5	libXt.so.6 	 libgnutls.so.13
libm.so.6	libSM.so.6 	 libkrb5support.so.0 
libdl.so.2	libICE.so.6 	 libkeyutils.so.1
libstdc++.so.6	libXrandr.so.2	 libresolv.so.2
libgcc_s.so.1	libXrender.so.1	 libgcrypt.so.11
libc.so.6	libXinerama.so.1 libgpg-error.so.0
ld-linux.so.2	libXau.so.6	 libnsl.so.1
libX11.so.6	libXdmcp.so.6	 libsepol.so.1
libGLU.so.1 	libdl.so.2	 libz.so.1
libGL.so.1	libselinux.so.1	 librt.so.1
libXmu.so.6	libcrypt.so.1	 libpthread.so.0

Explanation of Platform Support

The CXC's commitment to support a platform - i.e. a version of an operating system - means that we undertake to fix bugs on that system. This requires that we are able to compile CIAO from source on each platform, which is a much greater commitment than simply providing a compatible binary. Additionally, it is typically necessary to support several versions of each operating system: former, current and new.

When we support a system:

  1. We test every tool on every platform via a large number of regression tests and scripts; this requires a greater amount of time when the number of systems increases.
  2. We have to have current machines running each of these systems.
  3. We make a tarball and install it on each system; this process is never problem-free, and takes manpower and time.

As a result, we are not able to support a larger number of systems than we currently do. We gather information from users on what platforms they are running (or want to use) in order to prevent the overextension of our resources. Please contact the CXC Helpdesk if you have input you would like the CXC to consider for the next release of CIAO.


Last modified: 13 November 2018
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