My Tech Notes

Creators of Mono so far haven't made it very simple to install; precompiled binaries exist only for few not the most popular distributions like Red Hat Enterprise 4 or OpenSuSe 10.3. But even there, it is a bit of a pain to download, verify dependencies and install all required packages.

One tool suggested to help somewhat with with problem is yum. Today we will talk about what it takes to use yam on Red Hat Enterprise 4 to install latest Mono release.

Note that at any point during that process it may turn out that your system is missing some requirements which mine didn't; it is assumed you know to to locate missing packages on whatever media you are using and install them.

We begin by installing certain prerequisites of yum. All of them are python packages, and all of them should be compatible with python 2.3.4 which comes with RHE4; upgrading to a newer python version may be possible, but not recommended since yum also depends on python package rpm, which is part of RedHat distribution.

1. urlgrabber. cd /tmp
   wget http://linux.duke.edu/projects/urlgrabber/download/urlgrabber-3.1.0.tar.gz
   tar -xvzf urlgrabber-3.1.0.tar.gz
   cd urlgrabber-3.1.0
   python setup.py build
   python setup.py install
   
2. ElementTree. Using http://effbot.org/media/downloads/elementtree-1.2-20040618.tar.gz, same procedure as above;
3. cElementTree.
   Using http://effbot.org/media/downloads/cElementTree-1.0.5-20051216.tar.gz, same procedure as above.

cd /tmp
wget http://linux.duke.edu/projects/yum/download/2.6/yum-2.6.1.tar.gz
tar -xvzf yum-2.6.1.tar.gz
cd yum-2.6.1
make DESTDIR=/
make DESTDIR=/ install

[root@myRHE4 ~]# python
Python 2.3.4 (#1, Jan  9 2007, 16:40:18)
[GCC 3.4.6 20060404 (Red Hat 3.4.6-3)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import yum
>>>

cd /etc/yum.repos.d
wget http://www.go-mono.com/download-stable/rhel-4-i386/mono.repo

yum install mono-complete
yum install gtk-sharp2-complete
yum install mono-basic
yum install mono-debugger

#! /bin/bash
if [ ! -e /proc/sys/fs/binfmt_misc/register ]; then
    /sbin/modprobe binfmt_misc
    # Some distributions, like Fedora Core, perform
    # the following command automatically when the
    # binfmt_misc module is loaded into the kernel.
    # Thus, it is possible that the following line
    # is not needed at all. Look at /etc/modprobe.conf
    # to check whether this is applicable or not.
    mount -t binfmt_misc none /proc/sys/fs/binfmt_misc
fi

# Register support for .NET CLR binaries
if [ -e /proc/sys/fs/binfmt_misc/register ]; then
    # Replace /usr/bin/mono with the correct pathname to
    # the Mono CLR runtime (usually /usr/local/bin/mono
    # when compiling from sources or CVS).
    echo ':CLR:M::MZ::/usr/bin/mono:' > /proc/sys/fs/binfmt_misc/register
else
    echo "No binfmt_misc support"
    exit 1
fi

using Gtk;
using System;

class Hello {

static void Main()
{
Application.Init ();

// Set up a button object.
Button btn = new Button ("Hello World");
// when this button is clicked, it'll run hello()
btn.Clicked += new EventHandler (hello);

Window window = new Window ("helloworld");
// when this window is deleted, it'll run delete_event()
window.DeleteEvent += delete_event;
               
// Add the button to the window and display everything
window.Add (btn);
window.ShowAll ();

Application.Run ();
}

// runs when the user deletes the window using the "close
// window" widget in the window frame.
static void delete_event (object obj, DeleteEventArgs args)
{
Application.Quit ();
}

// runs when the button is clicked.
static void hello (object obj, EventArgs args)
{
Console.WriteLine("Hello World");
Application.Quit ();
}
}

gmcs helloworld.cs -pkg:gtk-sharp-2.0
./helloworld.exe

Labels: linux, mono, redhat, yum

# posted by Kostya @ 4:59 PM