What is -gl parameter?

[egsuh]

Sometimes I see this message when I try to compile Lazarus project.

Right now, I'm trying to make a pas2js project.

Code: Pascal  [Select][+][-]

1. program project2;
2.  
3. {$mode objfpc}
4.  
5. uses
6.    JS, Classes, SysUtils, Web, p2_unit1;
7. begin
8.    with TForm1.Create(nil) do
9.       Button1Click(nil);
10. end.          
11.  
12. // unit having a form
13. unit p2_unit1;
14.  
15. {$mode ObjFPC}
16.  
17. interface
18.  
19. uses
20.    Classes, SysUtils, Forms, Controls, Graphics, Dialogs, StdCtrls;
21.  
22. type
23.  
24.    { TForm1 }
25.  
26.    TForm1 = class(TForm)
27.       Button1: TButton;
28.       procedure Button1Click(Sender: TObject);
29.    private
30.  
31.    public
32.  
33.    end;
34.  
35. var
36.    Form1: TForm1;
37.  
38. implementation
39.  
40. {$R *.lfm}
41.  
42. { TForm1 }
43.  
44. procedure TForm1.Button1Click(Sender: TObject);
45. begin
46.    ShowMessage('Hello, world');
47. end;
48.  
49. end.
50.  

I could make following run --- the browser's console displayed 'hello, world'.

Code: Pascal  [Select][+][-]

1. program project2;
2.  
3. {$mode objfpc}
4.  
5. uses
6.    JS, Classes, SysUtils, Web, p2_unit1;
7.  
8. begin
9.    Writeln ('hello, world');
10. end.
11.  

[TRon]

What is -gl parameter?

See documentation:

-gl        Use line info unit (show more info with backtraces) 

In practice that should provide you a backtrace with source-code line numbers in an attempt to make it easier to detect where the error is situated in your source-code.

edit: In Lazarus that option can be set in the project options, debugging see picture in wiki (Display Line numbers in run-time error backtraces (-gl) )

[egsuh]

I was searching for "compiler options", not command-line options.
Anyway displaying line number seems irrelevant for my case. I need to study Pas2JS a little more.

[TRon]

I was searching for "compiler options", not command-line options.

You seem to depict them as two different entities but they are actually the same 

[Thaddy]

You simply can not use most Lazarus components for a pas2js application.

[egsuh]

It's strange that it does not work even I have removed forms from the project. It used to work.