Java compiler on Fedora (GCJ)

[Angelo Moreschini]

I am not able to install the java compiler on fedora (

*https://docs.fedoraproject.org/en-US/Fedora_Core/6/html/Release_Notes/sn-Jav...
https://docs.fedoraproject.org/en-US/Fedora_Core/6/html/Release_Notes/sn-Java.html*
).

I read that fedora not support directly gcj ...
So I try to work around, to install it  indirectly, but I have to much
problem to find the necessary dependencies...

Ho to do ?
any advice will welcome

Angelo

[Christopher]

On Sun, Jan 6, 2019 at 3:23 AM Angelo Moreschini
 wrote:
> I am not able to install the java compiler on fedora (
>
> https://docs.fedoraproject.org/en-US/Fedora_Core/6/html/Release_Notes/sn-Jav...
>
> ).
>
> I read that fedora not support directly gcj ...
> So I try to work around, to install it  indirectly, but I have to much problem to find the necessary dependencies...
>
> Ho to do ?
> any advice will welcome
>
> Angelo

That's a very old version of the Fedora docs. I'm pretty sure gcj is a
dead project. Fedora now ships with OpenJDK. In the latest version
(Fedora 29), there are several versions available. To see them, run:
sudo dnf repoquery --whatprovides */bin/javac

You'll probably want either JDK 8 or 11, so one of the following
should work for you:
sudo dnf install java-1.8.0-openjdk-devel # if you want JDK 8, specifically
sudo dnf install java-11-openjdk-devel # if you want JDK 11, specifically
sudo dnf install java-openjdk-devel # if you want the latest OpenJDK,
currently 11

[Angelo Moreschini]

Tank you Christopher,

I know "jdk" that I use regularly, but I am looking for something different.
The development with JDK produce .jar files that are compressed files made
with byte-code (.files.class ).
...To run jar files, you need the java environment (the command is "java
-jar xxx.jar").

I look for a possibility to get directly executable files in Linux
environment.
They are some tools that convert jar filer in executable for the Windows
environment.. (Launch4j, Excelsior <very expensive!!>, ...).

I am looking for a a real compiler in Linux environment for the Java
language, a compiler that produce directly executable files (as gcc is for
the C language)...

On Sun, Jan 6, 2019 at 11:51 AM Christopher 
wrote:
> On Sun, Jan 6, 2019 at 3:23 AM Angelo Moreschini
>  wrote:
> > I am not able to install the java compiler on fedora (
>
> https://docs.fedoraproject.org/en-US/Fedora_Core/6/html/Release_Notes/sn-Jav...
> > ).
> >
> > I read that fedora not support directly gcj ...
> > So I try to work around, to install it  indirectly, but I have to much
>
> problem to find the necessary dependencies...
> > Ho to do ?
> > any advice will welcome
> >
> > Angelo
>
> That's a very old version of the Fedora docs. I'm pretty sure gcj is a
> dead project. Fedora now ships with OpenJDK. In the latest version
> (Fedora 29), there are several versions available. To see them, run:
> sudo dnf repoquery --whatprovides */bin/javac
>
> You'll probably want either JDK 8 or 11, so one of the following
> should work for you:
> sudo dnf install java-1.8.0-openjdk-devel # if you want JDK 8, specifically
> sudo dnf install java-11-openjdk-devel # if you want JDK 11, specifically
> sudo dnf install java-openjdk-devel # if you want the latest OpenJDK,
> currently 11
> _______________________________________________
> users mailing list -- [e-mail]
> To unsubscribe send an email to [e-mail]
> Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html
> List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
> List Archives:
> https://lists.fedoraproject.org/archives/list/[e-mail]

[Roberto Ragusa]

On 1/6/19 5:24 PM, Angelo Moreschini wrote:
> I am looking for a a real compiler in Linux environment for the Java language, a compiler that produce directly executable files (as gcc is for the C language)...

Unfortunately there is probably nothing like gcj anymore.
I remember using objdump to look at the assembly instructions produced
by the Java code in the past, gcj was a very fascinating technology.

[Angelo Moreschini]

Pity that this project is no longer maintained for Fedora.

I believe that, perhaps, it is some Linux distribution that support it.
I did some tests, for example with
--------------------
rpm -ivh
java-compiler/java-1.4.2-gcj-compat-1.4.2.0-40.111.3mdv2007.1.x86_64.rpm
--------------------
but I could not finish the installation because the dependencies:

This is a problem that involves strategic choices about Java language
(perhaps Oracle could examine the possibility of managing the Java language
with an compiler type gcc used for the C language 😊).

Perhaps someone is more informed of me on this subject ?

Thank you

On Sun, Jan 6, 2019 at 11:31 PM Roberto Ragusa 
wrote:
> On 1/6/19 5:24 PM, Angelo Moreschini wrote:
> > I am looking for a a real compiler in Linux environment for the Java
>
> language, a compiler that produce directly executable files (as gcc is for
> the C language)...
> Unfortunately there is probably nothing like gcj anymore.
> I remember using objdump to look at the assembly instructions produced
> by the Java code in the past, gcj was a very fascinating technology.
>
> --
>    Roberto Ragusa    mail at robertoragusa.it
> _______________________________________________
> users mailing list -- [e-mail]
> To unsubscribe send an email to [e-mail]
> Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html
> List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
> List Archives:
> https://lists.fedoraproject.org/archives/list/[e-mail]