Anyone else having trouble with 19.05 on Linux?

[Hank Lenzi]

Hello --

After some time away from trying to learn Eiffel, I'm trying some trivial stuff here on 19.05 on Ubuntu but Eiffel Studio doesn't seem to pipe out a trivial print to to a terminal.

Is it my fault? Is it a bug?

Thanks.

Hank

class

APPLICATION

inherit

ARGUMENTS_32

MATH_CONST

create -- the name e.g.,in Ruby the name is "initialize", but we call it "make" here

       -- initialization formal parameters are in the class files

       -- over here, we can pass the arguments to the initialization parameters in the "do" routine below:

make

feature {NONE} -- Initialization

make

-- Run application.

do

  create aGear -- create an instance of Gear

  create aWheel

    aGear.set_cog (11)

    aGear.set_chainring (26)

    print (aGear.get_chainring)

end

feature -- Access

aGear: GEAR -- aGear is a GEAR

aWheel: WHEEL

end

[Louis M]

Hi,

Do you start EiffelStudio from a terminal. On Linux, there is no output terminal accessible from EiffelStudio. When you use a print, it is printed on the same terminal that you start EiffelStudio.

Hope this help,

Louis M

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[Hank Lenzi]

OK, I wasn't aware of that, starting from a terminal. I just click the darn icon. 

Thanks!

[Hank Lenzi]

   So, just to be clear, whenever there's and example that involves printing to the terminal, on Linux, you will have to go to the source file and compile it, such as the

   PERSON class example by Larry Rix on YouTube: https://www.youtube.com/watch?v=t0J8CXMR4Ko

   And no matter what you tweak in the setting ("xterm", "gnome-terminal", whatever, Eiffel Studio 19.05 - the only GPLed one) will not pipe the output to a terminal.

   This overlooked little stumbling block kept me scratching my head a lot. I feel maybe a little note somewhere in the Eiffel Studio site is warranted.

   

❯ /usr/bin/ec application.e 

Eiffel Compilation Manager

Version 19.05.10.3187 GPL Edition - unix

Degree 6: Examining System

Degree 5: Parsing Classes

Degree 4: Analyzing Inheritance

Degree 3: Checking Types

Degree 2: Generating Byte Code

Freezing System Changes

Degree -1: Generating Code

System Recompiled.

Preparing C compilation

Compiling C code in C1

Compiling C code in E1

C compilation completed

source/eiffel/eiffel_tutorial on  master [!?] took 3s 

❯ ls

application  application.e  application.ecf  eiffel_tutorial.ecf  EIFGENs  person.e

source/eiffel/eiffel_tutorial on  master [!?] 

❯ chmod +x ./application

source/eiffel/eiffel_tutorial on  master [!?] 

❯ ./application 

Tom is 27

[r...@amalasoft.com]

Hi Hank

This is not unique to Eiffel apps.  Back when I did this sort of thing, I would create a different shortcut on the desktop.  Instead of it being a link to the executable, have it call 'xterm' (or equivalent), taking the GUI app as argument.  You'll need to verify the syntax, but it's pretty straightforward.

R

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[Hank Lenzi]

Hey rfo - 

Got ya. I thought that because, you know, there were some settings I could tweak  (in Preferences -> General -> Console shell command) this should be a matter of setting the correct syntax for the terminal evocation. But that doesn't work, only compiling and running from a terminal works (evoking /usr/bin/ec like I posted). 

Like I said, I haven't seen this point mentioned at all. It matters because when you're going through the video tutorials, a shell will open in WIndows, but not in Linux, and this causes confusion. 

Thanks

Hank

[Louis M]

No. You don't have to compile manually by terminal. You just need to start EiffelStudio from a terminal. In other words, from a terminal, use the command:

> estudio

After that, you use EiffelStudio as you would do when you start it from the menu icon. The only difference is, when you print something, look at the terminal that you started EiffelStudio with and you will see the thing you printed.

Compiling from the terminal and executing it after each modification is way overkill.

Hope it is clearer,

Louis M

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[Hank Lenzi]

Yes. Thanks.

(Why aren't these simple details mentioned clearly in the Eiffel documentation?)