Every Flavour Beans

Gentoo

Java 1.5 and Eclipse in Gentoo – Part II

2138 days

by tabrez in Gentoo, GNU/Linux, Java

My previous post discussed the installation of Java on a Gentoo system. Its all well as long as you want to run the default supported version of java on the Gentoo system – you install blackdown-jdk 1.4, Eclipse 3.0, and maybe Eclipse CDT too and get on with development. But if you want to install java 1.5(Tiger) then you need to unmask the package before you can install it and also remember to make blackdown(or sun) jdk 1.4 as the default JVM for the system. You can keep sun jdk 1.5 as the default JVM for the user. The procedure is like this:

sh# java-config -L

[sun-jdk-1.5.0.06] “Sun JDK 1.5.0.06″ (/etc/env.d/java/20sun-jdk-1.5.0.06) *
[blackdown-jdk-1.4.2.03] “Blackdown JDK 1.4.2.03″ (/etc/env.d/java/20blackdown-jdk-1.4.2.03)

This shows you all the installed jdks on your system. Use the name as given under the brackets to set that particular jvm as your system default:

sh# java-config -S blackdown-jdk-1.4.2.03
sh# /usr/sbin/env-update && source /etc/profile

This sets the blackdown jdk 1.4 as the system jvm, which is the recommended option. You can set the sun jdk 5.0 as the user default jvm though:

sh# java-config -s sun-jdk-1.5.0.06
sh# echo source ~/.gentoo/java-env >> ~./bash_profile
sh# source ~/.gentoo/java-env

This sets the sun jdk 1.5 as the user jvm and it is safe this way. But don’t make 1.5 version as the default jvm for the system unless you are ready to break a lot of java applications.

Best way to install Java on Gentoo OS:

But this still is not an ideal setup from my point of view; the installed Eclipse version doesn’t support the Java 1.5 version. If you want to use the latest versions of all the java software without going through all of these hassles, you need to install everything related to java manaully in the user home directory. This won’t affect your normal portage structure in any way(but you still need a system jdk to run java applications from the browser).

First download the latest versions of Java SDK and the Eclipse IDE from the Internet and copy them into the home directory.

Download sun jdk 1.5.0 update 6 from here and copy it into the home directory. You will have to accept the license to be able to download this. Be sure to download the .bin version of the file and not the RPM version.

Download the latest version of the Eclipse IDE from here and copy it in the home directory. The latest build available currently is Eclipse 3.2M5a. If you plan to use Eclipse CDT plugin to create C++ applications, then you have to be content with the Eclipse 3.1.2 version.

(All the above links are for the gnu/linux, 32-bit operating system. Finding similar package files for 64-bit systems shouldn’t be too difficult)

Install jdk as a normal user:

sh# chmod +x jdk_1_5_0_06-linux-i586.bin
sh# ./jdk_1_5_0_06-linux-i586.bin
sh# tar xvzf eclipse-sdk-3,1,2-linux-gtk.tar.gz

Rename the directory to which the above files are extracted to something simple, like “eclipse”.

Now add the following lines to your user profile( eg ~/.bash_profile ):

JDK_HOME=~/jdk1.5.0_06
JAVAC=~/jdk1.5.0_06/bin/javac
PATH=~/jdk1.5.0_06/bin:~/jdk1.5.0_06/jre/bin:~/eclipse:$PATH
MANPATH=$MANPATH:~/~/jdk1.5.0_06/man
JAVA_HOME=~/jdk1.5.0_06

source the profile once and start the Eclipse IDE:

sh# source ~./bash_profile
sh# eclipse

Go to Windows menu and select Preferences from it. Select Java -> Installed JREs from the left pane and click on the “Add” button on the right pane.

Browse to and select jdk1.5.0_06/jre directory from your home directory. Enter “JDK1.5.0_06″ in “JRE Name:” field. Click on Java -> Compiler item from the left pane and select “5.0″ from the “Compiler Compliance Settings:” selection list.

Click OK button to dismiss the dialog box.

Now you can create java 1.5 applications on your Gentoo system using the Eclipse IDE.
Just extract the Eclipse CDT tar file in the eclipse folder to get the C++ support in Eclipse. (contents of ‘features’ directory from downloaded package should go into the ‘features’ directory in eclipse, and contents of ‘plugins’ directory should go into the ‘plugins’ directory in eclipse).

Java on Gentoo

2149 days

by tabrez in Gentoo, GNU/Linux, Java

The simplest way to get started with Java development in Gentoo is to install the Blackdown JDK-1.4.2 along with the Eclipse IDE:

sh# emerge blackdown-jdk eclipse-sdk

If you want to install the sun’s version of the jdk instead of the blackdown jdk, you can get the 1.4.2 version of it using:

sh# emerge sun-jdk java-sdk-docs

To install the 1.5 version of the jdk, you need to unmask it first. Add the following two lines to your /etc/portage/package.keywords file:

>=dev-java/sun-jdk-1.5.0 ~x86
>=dev-java/java-sdk-docs-1.5.0 ~x86

Now do the emerge:

sh# emerge sun-jdk java-sdk-docs

You can also install both of these versions at the same time, and then make one of them as the default jdk. If you need java support in other applications too(like web browser etc), then make sure to add the relevant keywords in the /etc/portage/package.use file:

=dev-java/sun-jdk-1.4.2.10-r2 X alsa browserplugin doc examples jce mozilla nsplugin

This also installs the documentation and the examples – remove these words if you don’t to install them. Also change the version number if you are installing the 1.5 version of the jdk.

If you want to use Eclipse IDE to create C++ programs, you need the eclipse-cdt plugin. First unmask it by placing the following line in /etc/portage/package.keywords file:

>=dev-util/eclipse-cdt-2.0 ~x86

Now do the emerge:

sh# emerge eclipse-cdt

More information on installing java 1.5 and eclipse 3.x on Gentoo OS.

Installing C++ Boost on Gentoo and Debian/Ubuntu

2155 days

by tabrez in C++ Boost, Gentoo, GNU/Linux, Ubuntu

Note: Updated the post to note the availability of C++ Boost 1.34.1 libraries for Gentoo and (especially) for Ubuntu 7.10(Gutsy Gibbon).

1. C++ Boost on Gentoo:

On the shell prompt, type:

sh# emerge boost

This should install the latest version of boost available for Gentoo. Currently 1.33.1 version of Boost Libraries is available for Gentoo. Synchronise(‘emerge –sync’) with the Gentoo portage if your ‘emerge -p boost’ shows an earlier version. You can install the latest version Boost 1.34.1 by adding the line “dev-libs/boost ~x86″ to “/etc/portage/package.keywords” file.

2. C++ Boost on Debian/Ubuntu:

Update2:
Boost 1.34.1 version is now available. To install the latest version, run the following command(or select these packages from Synaptic Package Manager):

sh# apt-get install libboost-date-time-dev libboost-date-time1.34.1 libboost-dev libboost-doc libboost-filesystem-dev libboost-filesystem1.34.1 libboost-graph-dev libboost-graph1.34.1 libboost-iostreams-dev libboost-iostreams1.34.1 libboost-program-options-dev libboost-program-options1.34.1 libboost-python-dev libboost-python1.34.1 libboost-regex-dev libboost-regex1.34.1 libboost-signals-dev libboost-signals1.34.1 libboost-test-dev libboost-test1.34.1 libboost-thread-dev libboost-thread1.34.1

Or,

sh# apt-get install libboost.*-dev libboost-doc libboost.*1.34.1

~~Update1:~~ See the new update above
Boost 1.33.1 version is now available. To install this version, run the following command(or select these packages from Synaptic Package Manager):

sh# apt-get install libboost-date-time-dev libboost-date-time1.33.1 libboost-dev libboost-doc libboost-filesystem-dev libboost-filesystem1.33.1 libboost-graph-dev libboost-graph1.33.1 libboost-iostreams-dev libboost-iostreams1.33.1 libboost-program-options-dev libboost-program-options1.33.1 libboost-python-dev libboost-python1.33.1 libboost-regex-dev libboost-regex1.33.1 libboost-signals-dev libboost-signals1.33.1 libboost-test-dev libboost-test1.33.1 libboost-thread-dev libboost-thread1.33.1

Or,

sh# apt-get install libboost.*-dev libboost-doc libboost.*1.33.1

~~Run the following command(or select these packages from Synaptic Package Manager):~~ See the update above
sh# apt-get install libboost-date-time-dev libboost-date-time1.33.0 libboost-dev libboost-doc libboost-filesystem-dev libboost-filesystem1.33.0 libboost-graph-dev libboost-graph1.33.0 libboost-iostreams-dev libboost-iostreams1.33.0 libboost-program-options-dev libboost-program-options1.33.0 libboost-python-dev libboost-python1.33.0 libboost-regex-dev libboost-regex1.33.0 libboost-signals-dev libboost-signals1.33.0 libboost-test-dev libboost-test1.33.0 libboost-thread-dev libboost-thread1.33.0

You can use the following simple command to install every library present in Boost that matches the pattern, if you don’t want to be selective about which libraries to install:

sh# apt-get install libboost.*-dev libboost-doc libboost.*1.33.0

All this mess could be avoided if only Debian/Ubuntu packages could build a meta-package to include all the C++ Boost libraries. One could use the pattern libboost.* but it includes the Boost debug files(libboost-dbg) too.

3. Build C++ Programs Using Boost Libraries

Once the boost package is installed, the C++ programs that make use of boost libraries can be built simply like this:

sh# g++ -o first first.cpp

If the program needs to be linked to a library(for eg: filesystem library), then specify the name of the library using the -l switch:

sh# g++ -o second second.cpp -lboost-filesystem

I will follow this up with the installation procedure for Slackware and RPM based distributions(Done).

Update:Thanks to Jun Zhang for pointing out the missing packages in the Boost installation command for Ubuntu; the command is now updated.

C# & MonoDevelop (.NET) on Gentoo and Ubuntu

2168 days

by tabrez in Gentoo, GNU/Linux, Mono, Ubuntu

.NET developers looking for a similar development framework on the GNU/Linux operating system should check out the Mono project. It’s fairly simple to install Mono on most of the GNU/Linux platforms and to start developing applications using the C# language. But beginner programmers would love to have an easy to use IDE which could integrate all the tools required for C# based development in one place. One such tool is MonoDevelop which is fast developing into a useful product. Installing it on rpm based distribution was not a satisfactory experience for me however. But I knew it should be easy to install it on Ubuntu and Gentoo operating systems. if you have included Mutliverse and Universe repositories in the apt source list, then MonoDevelop is just one 'apt-get install' away on Ubuntu.

sh# sudo apt-get install monodevelop

It required only a bit more effort on a Gentoo system, so I am documenting it here. Most of the packages required to get MonoDevelop working on a Gentoo system are in the masked state. Put the following lines in the /etc/portage/package.keywords file(create it if it already doesn't exist):

>=dev-dotnet/gtkhtml-sharp-2.4.0 ~x86
>=dev-dotnet/glade-sharp-2.4.0 ~x86
>=dev-dotnet/gconf-sharp-2.4.0 ~x86
>=dev-dotnet/art-sharp-2.4.0 ~x86
>=dev-dotnet/gnome-sharp-2.4.0 ~x86
>=dev-dotnet/vte-sharp-2.4.0 ~x86
>=dev-dotnet/gnomevfs-sharp-2.4.0 ~x86
dev-dotnet/gtksourceview-sharp ~x86
dev-dotnet/gecko-sharp ~x86
dev-dotnet/libgdiplus ~x86
dev-util/monodevelop ~x86
dev-lang/mono ~x86

you can drop ">=" in front of some of the lines above by dropping the version numbers in the same lines.
eg: dev-dotnet/gtkhtml-sharp ~x86

Now run the following command to get everything installed:

sh# emerge monodevelop

Similarly 'emerge mono' will get only the mono environment, and all the development can be carried out using your favourite editor and the command shell.

If you get any problems, first try 'emerge sync' to get everything synchronised, and then re-run 'emerge monodevelop'. If you still get any errors, see if still there are any dependency problems left that are in the masked state. if so, add them too to the '/etc/portage/package.keywords' file and repeat the process.
Let me know how this works out for you as I haven't found much information regarding this on the internet.