[PATCH] user: Add openSUSE host details

[Alan Cudmore]

This patch adds details on the packages needed for the RTEMS
source builder on openSUSE Leap 15.4 64 bit. The commands
were tested on a new install with the RTEMS source builder
master branch.
---
 user/hosts/posix.rst | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/user/hosts/posix.rst b/user/hosts/posix.rst
index 9769e07..d263247 100644
--- a/user/hosts/posix.rst
+++ b/user/hosts/posix.rst
@@ -179,8 +179,19 @@ than the usual zlib-dev):
 openSUSE
 ~~~~~~~~
 
-This has been reported to work but no instructions were provided. This is an
-opportunity to contribute. Please submit any guidance you can provide.
+The RTEMS Source Builder has been tested on openSUSE Leap 15.4 64bit.
+Starting with a clean install with source repositories enabled, the following
+zypper command installs the required packages:
+
+.. code-block:: none
+
+   # sudo zypper in -t pattern devel_C_C++ devel_python3
+
+In addition, the following command can set python3 as the default python interpreter:
+
+.. code-block:: none
+
+   # sudo update-alternatives --install /usr/bin/python python /usr/bin/python3 1
 
 .. _FreeBSD:
 
-- 
2.34.1