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author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2019-01-11 15:28:57 +0100 |
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committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2019-01-14 07:15:27 +0100 |
commit | 0facb9de943c42f69b98ee4b1fcd115c20adafc0 (patch) | |
tree | 7db0b1764888560ba9fc886b8caf2a0c006520ac /user/start/prefixes.rst | |
parent | user: Rework "Hardware" chapter (diff) | |
download | rtems-docs-0facb9de943c42f69b98ee4b1fcd115c20adafc0.tar.bz2 |
user: Move "Prefixes" to "Quick Start"
Move "Project Sandboxing" to a separate section of the "Installation"
chapter since this is an advance topic which may confuse new users.
Diffstat (limited to '')
-rw-r--r-- | user/start/prefixes.rst | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/user/start/prefixes.rst b/user/start/prefixes.rst new file mode 100644 index 0000000..e9dad29 --- /dev/null +++ b/user/start/prefixes.rst @@ -0,0 +1,47 @@ +.. SPDX-License-Identifier: CC-BY-SA-4.0 + +.. Copyright (C) 2016 Chris Johns <chrisj@rtems.org> + +.. index:: prefix +.. _prefixes: + +Prefixes +======== + +You will see the term :ref:term:`prefix` referred to thoughout this +documentation and in a wide number of software packages you can download from +the internet. A **prefix** is the path on your computer a software package is +built and installed under. Packages that have a **prefix** will place all parts +under the **prefix** path. On a host computer like Linux the packages you +install from your distribution typically use a platform specific standard +**prefix**. For example on Linux it is :file:`/usr` and on FreeBSD it is +:file:`/usr/local`. + +We recommend you *DO NOT* use the standard **prefix** when installing the RTEMS +Tools. The standard **prefix** is the default **prefix** each package built by +the RSB contains. If you are building the tools when logged in as a *Standard +User* and not as the *Super User* (``root``) or *Administrator* the RTEMS +Source Builder (RSB) *will* fail and report an error if the default **prefix** +is not writable. We recommend you leave the standand **prefix** for the +packages your operating system installs or software you manually install such +as applications. + +A further reason not to use the standard **prefix** is to allow more than one +version of RTEMS to exist on your host machine at a time. The ``autoconf`` and +``automake`` tools required by RTEMS are not versioned and vary between the +various versions of RTEMS. If you use a single **prefix** such as the standard +**prefix** there is a chance parts from a package of different versions may +interact. This should not happen but it can. + +For POSIX or Unix hosts, the RTEMS Project uses :file:`/opt/rtems` as it's +standard **prefix**. We view this **prefix** as a production level path, and we +prefer to place development versions under a different **prefix** away from the +production versions. Under this top level **prefix** we place the various +versions we need for development. For example the version 4.11.0 **prefix** +would be :file:`/opt/rtems/4.11.0`. If an update called 4.11.1 is released the +**prefix** would be :file:`/opt/rtems/4.11.1`. These are recommendations and +the choice of what you use is entirely yours. You may decide to have a single +path for all RTEMS 4.11 releases of :file:`/opt/rtems/4.11`. + +For Windows a typical **prefix** is :file:`C:\\opt\\rtems` and as an MSYS2 path +this is :file:`/c/opt/rtems`. |