const keyword: problems migrating code from gpc on Linux to gpc on OsX

11 Mar 2005

      Hi all.

The follwing three files reproduce an error I've encountered while 
porting some code from gpc
on Linux to gpc on OsX.

----------- file p1.pas --------
module p1;

export p1 = all;

const P = 155;

function Something() :boolean;

end;

function Something: boolean;
begin
  Something := false;
end;

end.
------------ file p2.pas ---------
module p2;

export p2 = all;

const P = 155;

function SomethingElse :boolean;

end;

function SomethingElse: boolean;
begin
  SomethingElse := false;
end;

end.
----------- file testconst.pas -------
program test(input, output);

import p1;p2;

var a,b : boolean;
  c    : integer;

begin
  a := Something;
  b := SomethingElse;
  c := P;
  writeln('test');
end.

---------------------------------------------------

If I try
gpc --automake testconst.pas
on my linux box it works fine. If I try the same command on my Mac I 
receive the following output:

p2.pas:5: error: redeclaration of `P'
p1.pas:5: error:  previous declaration

Please note that if you change both P and c to boolean type, everything 
works fine both on Linux and OsX

Precisely, on Linux I am running gpc 20041218 based on gcc-3.3.3.
On the Mac I run GNU Pascal version 20041218, based on gcc-3.4.3, i.e. 
the one currently
available on microbizz.

Any hint?

Thanks,
Stefano

Stefano Carpin

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