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D.gnu - Remove libphobos dependency

reply Vincent Richomme <forumer smartmobili.com> writes:
Hi,

I am interested in D language but libphobos library is far from being 
portable and development is too slow.
I would like to know how can I remove libphobos dependecy because from 
what I see now I cannot compile a simple example without it.




Thanks
Jul 12 2008
parent reply Lars Ivar Igesund <larsivar igesund.net> writes:
Vincent Richomme wrote:


 Hi,
 
 I am interested in D language but libphobos library is far from being
 portable and development is too slow.
 I would like to know how can I remove libphobos dependecy because from
 what I see now I cannot compile a simple example without it.
 
 
 
 
 Thanks



Look to Tango?

http://www.dsource.org/projects/tango

As for GDC specific, see the --nostdlib switch or something along those
lines.

-- 
Lars Ivar Igesund
blog at http://larsivi.net
DSource, #d.tango & #D: larsivi
Dancing the Tango
Jul 12 2008
next sibling parent Vincent Richomme <forumer smartmobili.com> writes:
Lars Ivar Igesund a écrit :

 Vincent Richomme wrote:
 

 Hi,

 I am interested in D language but libphobos library is far from being
 portable and development is too slow.
 I would like to know how can I remove libphobos dependecy because from
 what I see now I cannot compile a simple example without it.




 Thanks



 Look to Tango?
 
 http://www.dsource.org/projects/tango
 
 As for GDC specific, see the --nostdlib switch or something along those
 lines.
 



Sounds interesting buf in a first step I would like no lib.
I just want to display a message box on a wince platform.

There's something I don't understand with D language , I can see that on 
a sample given here http://www.digitalmars.com/d/2.0/index.html

#!/usr/bin/dmd -run


import std.stdio;

void main(string[] args)
{
    ....

}


but when I look ar D for win32 I can see this :

import std.c.windows.windows;

extern (C) void gc_init();
extern (C) void gc_term();
extern (C) void _minit();
extern (C) void _moduleCtor();
extern (C) void _moduleDtor();
extern (C) void _moduleUnitTests();

extern (Windows)
int WinMain(HINSTANCE hInstance,
	HINSTANCE hPrevInstance,
	LPSTR lpCmdLine,
	int nCmdShow)
{
     int result;

     gc_init();			// initialize garbage collector
     _minit();			// initialize module constructor table

     try
     {
	_moduleCtor();		// call module constructors
	_moduleUnitTests();	// run unit tests (optional)

	result = myWinMain(hInstance, hPrevInstance, lpCmdLine, nCmdShow);

	_moduleDtor();		// call module destructors
     }

     catch (Object o)		// catch any uncaught exceptions
     {
	MessageBoxA(null, cast(char *)o.toString(), "Error",
		    MB_OK | MB_ICONEXCLAMATION);
	result = 0;		// failed
     }

     gc_term();			// run finalizers; terminate garbage collector
     return result;
}

int myWinMain(HINSTANCE hInstance,
	HINSTANCE hPrevInstance,
	LPSTR lpCmdLine,
	int nCmdShow)
{
     /* ... insert user code here ... */
}

In this second example there are lots of code about garbage collection 
(gc_init, ...)while in the first sample there are not.
Does it mean on windows we always have to call gc_init ? Is it specific 
to Windows platform , GDC compiler or libphobos lib ?

Last question about auto keyword, does it mean variable is handled by 
garbage collector :

foreach (argc, argv; args)
     {
         // Object Oriented Programming
         auto cl = new CmdLin(argc, argv);
         // Improved typesafe printf
         writeln(cl.argnum, cl.suffix, " arg: ", cl.argv);
         // Automatic or explicit memory management
         delete cl;
     }


in the code below I don't understand why to declare auto if then it is 
destroyed manually ...
Jul 12 2008
prev sibling parent reply e-t172 <e-t172 akegroup.org> writes:
Lars Ivar Igesund a écrit :

 As for GDC specific, see the --nostdlib switch or something along those
 lines.



It's -nophoboslib, actually.
Jul 12 2008
parent reply Vincent Richomme <forumer smartmobili.com> writes:
e-t172 a écrit :

 Lars Ivar Igesund a écrit :

 As for GDC specific, see the --nostdlib switch or something along those
 lines.



 It's -nophoboslib, actually.



In which file should I add this parameter ?
Jul 13 2008
parent reply Vincent Richomme <forumer smartmobili.com> writes:
Vincent Richomme a écrit :

 e-t172 a écrit :

 Lars Ivar Igesund a écrit :

 As for GDC specific, see the --nostdlib switch or something along those
 lines.



 It's -nophoboslib, actually.



 In which file should I add this parameter ?
Jul 13 2008
parent David Friedman <dvdfrdmn users.ess-eff.net> writes:
Vincent Richomme wrote:

 Vincent Richomme a écrit :

 e-t172 a écrit :

 Lars Ivar Igesund a écrit :

 As for GDC specific, see the --nostdlib switch or something along those
 lines.



 It's -nophoboslib, actually.



 In which file should I add this parameter ?



 



-nophoboslib in the link command is the way to go.  This lets you link 
against libgcc without having the link libgphobos and the the system 
pthread libraries.

If you are using the GNU linker, you can also reduce link dependencies 
by compiling with -ffunction-sections and -fdata-sections and then link 
with -Wl,-gc-sections.
Jul 14 2008