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Hi all,
I recently downloaded winliblnp, the port by Michael Bunk of liblnp to
windows. Exactly what I needed, thanks Michael.
Unfortunately, I'm rather new to VC++ and I can't get it to compile. First,
I tried compiling it on its own - no joy (unresolved symbol _main - it
wanted to be part of an MFC project). So I start an MFC project and import
the stub.c file and tell the preprocessor where to find the include. Again,
no joy. I get the error message
CamStandDlg.obj : error LNK2001: unresolved external symbol "enum
lnp_init_result __cdecl lnp_init(char *,unsigned short,unsigned
char,unsigned char,int)" (?lnp_init@@YA?AW4lnp_init_result@@PADGEEH@Z)
Anybody know what I'm missing?
TIA
Tim
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To my knowledge nobody has been succesful with WinLNP!
I gave up after a while and now use LNP under Linux.
There was some work that somboby did which allowed the deamon
to run on Linux but the LNP program could be run under windows.
U could do a search in the mailing list archives.
Hope this helps
PS If u get WinLNP to work , let every one know how u did it!
----- Original Message -----
From: "Tim Auton" <tim.lugnet@uton.org>
To: <lugnet.robotics.rcx.legos@lugnet.com>
Sent: Friday, September 06, 2002 4:07 PM
Subject: Winliblnp problems
> Hi all,
>
> I recently downloaded winliblnp, the port by Michael Bunk of liblnp to
> windows. Exactly what I needed, thanks Michael.
>
> Unfortunately, I'm rather new to VC++ and I can't get it to compile. • First,
> I tried compiling it on its own - no joy (unresolved symbol _main - it
> wanted to be part of an MFC project). So I start an MFC project and import
> the stub.c file and tell the preprocessor where to find the include. • Again,
> no joy. I get the error message
>
> CamStandDlg.obj : error LNK2001: unresolved external symbol "enum
> lnp_init_result __cdecl lnp_init(char *,unsigned short,unsigned
> char,unsigned char,int)" (?lnp_init@@YA?AW4lnp_init_result@@PADGEEH@Z)
>
> Anybody know what I'm missing?
>
> TIA
>
> Tim
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I am using LNP under Linux, I was referring to your suggested solution,
which is both sensibly and confusingly called Winliblnp (distinct from
winlnp) - a port of liblnp for Windows.
I want to write robot control apps using video feedback, and my poor Linux
box doesn't have USB so I've had to venture into the (nightmare) world of
Visual C++.
Tim
"Shehryar Shaheen" <shehryar.shaheen@ul.ie> wrote in message
news:009e01c255c2$dfc82f10$1d96c988@2KDCQ9370JSSHAHEEN...
> To my knowledge nobody has been succesful with WinLNP!
>
> I gave up after a while and now use LNP under Linux.
>
> There was some work that somboby did which allowed the deamon
> to run on Linux but the LNP program could be run under windows.
>
> U could do a search in the mailing list archives.
>
> Hope this helps
>
> PS If u get WinLNP to work , let every one know how u did it!
>
> ----- Original Message -----
> From: "Tim Auton" <tim.lugnet@uton.org>
> To: <lugnet.robotics.rcx.legos@lugnet.com>
> Sent: Friday, September 06, 2002 4:07 PM
> Subject: Winliblnp problems
>
>
> > Hi all,
> >
> > I recently downloaded winliblnp, the port by Michael Bunk of liblnp to
> > windows. Exactly what I needed, thanks Michael.
> >
> > Unfortunately, I'm rather new to VC++ and I can't get it to compile. • First,
> > I tried compiling it on its own - no joy (unresolved symbol _main - it
> > wanted to be part of an MFC project). So I start an MFC project and • import
> > the stub.c file and tell the preprocessor where to find the include. • Again,
> > no joy. I get the error message
> >
> > CamStandDlg.obj : error LNK2001: unresolved external symbol "enum
> > lnp_init_result __cdecl lnp_init(char *,unsigned short,unsigned
> > char,unsigned char,int)" (?lnp_init@@YA?AW4lnp_init_result@@PADGEEH@Z)
> >
> > Anybody know what I'm missing?
> >
> > TIA
> >
> > Tim
>
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I need information about this version of legOS !!
please send me :)
nanobapt
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a ActiveX is easy to written with an other Comm activeX for Windows no ?
nanobapt
----- Original Message -----
From: Shehryar Shaheen <shehryar.shaheen@ul.ie>
To: <lugnet.robotics.rcx.legos@lugnet.com>
Sent: Friday, September 06, 2002 6:31 PM
Subject: Re: Winliblnp problems
> To my knowledge nobody has been succesful with WinLNP!
>
> I gave up after a while and now use LNP under Linux.
>
> There was some work that somboby did which allowed the deamon
> to run on Linux but the LNP program could be run under windows.
>
> U could do a search in the mailing list archives.
>
> Hope this helps
>
> PS If u get WinLNP to work , let every one know how u did it!
>
> ----- Original Message -----
> From: "Tim Auton" <tim.lugnet@uton.org>
> To: <lugnet.robotics.rcx.legos@lugnet.com>
> Sent: Friday, September 06, 2002 4:07 PM
> Subject: Winliblnp problems
>
>
> > Hi all,
> >
> > I recently downloaded winliblnp, the port by Michael Bunk of liblnp to
> > windows. Exactly what I needed, thanks Michael.
> >
> > Unfortunately, I'm rather new to VC++ and I can't get it to compile. • First,
> > I tried compiling it on its own - no joy (unresolved symbol _main - it
> > wanted to be part of an MFC project). So I start an MFC project and • import
> > the stub.c file and tell the preprocessor where to find the include. • Again,
> > no joy. I get the error message
> >
> > CamStandDlg.obj : error LNK2001: unresolved external symbol "enum
> > lnp_init_result __cdecl lnp_init(char *,unsigned short,unsigned
> > char,unsigned char,int)" (?lnp_init@@YA?AW4lnp_init_result@@PADGEEH@Z)
> >
> > Anybody know what I'm missing?
> >
> > TIA
> >
> > Tim
>
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Don't get what u mean!
----- Original Message -----
From: "nanobapt" <nanobapt@nordnet.fr>
To: <lugnet.robotics.rcx.legos@lugnet.com>
Sent: Friday, September 06, 2002 5:49 PM
Subject: Re: Winliblnp problems
> a ActiveX is easy to written with an other Comm activeX for Windows no ?
>
> nanobapt
> ----- Original Message -----
> From: Shehryar Shaheen <shehryar.shaheen@ul.ie>
> To: <lugnet.robotics.rcx.legos@lugnet.com>
> Sent: Friday, September 06, 2002 6:31 PM
> Subject: Re: Winliblnp problems
>
>
> > To my knowledge nobody has been succesful with WinLNP!
> >
> > I gave up after a while and now use LNP under Linux.
> >
> > There was some work that somboby did which allowed the deamon
> > to run on Linux but the LNP program could be run under windows.
> >
> > U could do a search in the mailing list archives.
> >
> > Hope this helps
> >
> > PS If u get WinLNP to work , let every one know how u did it!
> >
> > ----- Original Message -----
> > From: "Tim Auton" <tim.lugnet@uton.org>
> > To: <lugnet.robotics.rcx.legos@lugnet.com>
> > Sent: Friday, September 06, 2002 4:07 PM
> > Subject: Winliblnp problems
> >
> >
> > > Hi all,
> > >
> > > I recently downloaded winliblnp, the port by Michael Bunk of liblnp to
> > > windows. Exactly what I needed, thanks Michael.
> > >
> > > Unfortunately, I'm rather new to VC++ and I can't get it to compile. • First,
> > > I tried compiling it on its own - no joy (unresolved symbol _main - it
> > > wanted to be part of an MFC project). So I start an MFC project and • import
> > > the stub.c file and tell the preprocessor where to find the include. • Again,
> > > no joy. I get the error message
> > >
> > > CamStandDlg.obj : error LNK2001: unresolved external symbol "enum
> > > lnp_init_result __cdecl lnp_init(char *,unsigned short,unsigned
> > > char,unsigned char,int)" (?lnp_init@@YA?AW4lnp_init_result@@PADGEEH@Z)
> > >
> > > Anybody know what I'm missing?
> > >
> > > TIA
> > >
> > > Tim
> >
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From: "Tim Auton" <tim.lugnet@uton.org>
Sent: Friday, September 06, 2002 4:07 PM
> I recently downloaded winliblnp, the port by Michael Bunk of liblnp to
> windows. Exactly what I needed, thanks Michael.
>
> Unfortunately, I'm rather new to VC++ and I can't get it to compile • [snip]
> I get the error message
> CamStandDlg.obj : error LNK2001: unresolved external symbol "enum
> lnp_init_result __cdecl lnp_init(char *,unsigned short,unsigned
> char,unsigned char,int)" (?lnp_init@@YA?AW4lnp_init_result@@PADGEEH@Z)
>
> Anybody know what I'm missing?
I do, it's a namespace problem, down to you working in a C++ project and
winliblnp being in C. I suggest a quick and dirty hack of creating a
duplicate liblnp.h (called, say liblnpcpp.h) with extern "C" in front of all
the function declarations. It's dirty because you'll still need to keep the
existing liblnp.h around as it's referenced in stub.c. It is of course bad
programming practice to have two copies of something more or less identical
around and you really should read a book on C++. That one you bought, for
example. But hey, it's 1.45 am and it finally works :)
Tim
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In lugnet.robotics.rcx.legos, Tim Auton writes:
> From: "Tim Auton" <tim.lugnet@uton.org>
> Sent: Friday, September 06, 2002 4:07 PM
> > I recently downloaded winliblnp, the port by Michael Bunk of liblnp to
> > windows. Exactly what I needed, thanks Michael.
> >
> > Unfortunately, I'm rather new to VC++ and I can't get it to compile • [snip]
> > I get the error message
> > CamStandDlg.obj : error LNK2001: unresolved external symbol "enum
> > lnp_init_result __cdecl lnp_init(char *,unsigned short,unsigned
> > char,unsigned char,int)" (?lnp_init@@YA?AW4lnp_init_result@@PADGEEH@Z)
> >
> > Anybody know what I'm missing?
>
> I do, it's a namespace problem, down to you working in a C++ project and
> winliblnp being in C. I suggest a quick and dirty hack of creating a
> duplicate liblnp.h (called, say liblnpcpp.h) with extern "C" in front of all
> the function declarations
The usual method is to put the following near the top of the .h file:
#ifdef __cplusplus
extern "C" {
#endif
and the following at the bottom:
#ifdef __cplusplus
}
#endif
This eliminates the need for 2 .h files. HTH.
ROSCO
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