plib-users

[Plib-users] Installing plib-1.4.1

[Lars T. <to...@cs...>]

Hallo,

I've got some problems installing plib version 1.4.1. The compiler says...

c++ -DPACKAGE=\"plib\" -DVERSION=\"1.4.1\" -DHAVE_LIBDL=1 -DHAVE_LIBGL=1
-DHAVE_LIBGLU=1 -DHAVE_LIBGLUT=1 -DHAVE_GL_GL_H=1 -DHAVE_GL_GLU_H=1
-DLINUX_JOYSTICK_IS_PRESENT=1 -DGLUT_IS_PRESENT=1  -I. -I.
-I../../src/util  -I/usr/local/include  -g -O2 -O6 -Wall -c netSocket.cxx
netSocket.cxx: In method `int netSocket::accept(netAddress *)':
netSocket.cxx:217: passing `int *' as argument 3 of `accept(int, sockaddr
*, socklen_t *)' changes signedness
netSocket.cxx: In method `int netSocket::recvfrom(void *, int, int,
netAddress *)':
netSocket.cxx:254: passing `int *' as argument 6 of `recvfrom(int, void *,
unsigned int, int, sockaddr *, socklen_t *)' changes signedness
make: *** [netSocket.o] Error 1

This happens only in version 1.4.0 and 1.4.1. Plib-1.2.0 compiles fine
(but I need 1.4.1 :) for FlightGear-0.7.8; Thanks to booth teams - great
work) I have gcc-2.95.2 and a normal SuSE 7.0.

Any guesses what goes wrong ?

Thanks in advance, bye lars.

Re: [Plib-users] Installing plib-1.4.1

[Sam S. <sa...@sp...>]

----- Original Message -----
From: "Lars Tornow" <to...@cs...>
To: <pli...@li...>
Sent: Wednesday, July 11, 2001 8:47 PM
Subject: [Plib-users] Installing plib-1.4.1


> Hallo,
>
> I've got some problems installing plib version 1.4.1. The compiler says...
>
> c++ -DPACKAGE=\"plib\" -DVERSION=\"1.4.1\" -DHAVE_LIBDL=1 -DHAVE_LIBGL=1
> -DHAVE_LIBGLU=1 -DHAVE_LIBGLUT=1 -DHAVE_GL_GL_H=1 -DHAVE_GL_GLU_H=1
> -DLINUX_JOYSTICK_IS_PRESENT=1 -DGLUT_IS_PRESENT=1  -I. -I.
> -I../../src/util  -I/usr/local/include  -g -O2 -O6 -Wall -c netSocket.cxx
> netSocket.cxx: In method `int netSocket::accept(netAddress *)':
> netSocket.cxx:217: passing `int *' as argument 3 of `accept(int, sockaddr
> *, socklen_t *)' changes signedness
> netSocket.cxx: In method `int netSocket::recvfrom(void *, int, int,
> netAddress *)':
> netSocket.cxx:254: passing `int *' as argument 6 of `recvfrom(int, void *,
> unsigned int, int, sockaddr *, socklen_t *)' changes signedness
> make: *** [netSocket.o] Error 1
>
> This happens only in version 1.4.0 and 1.4.1. Plib-1.2.0 compiles fine
> (but I need 1.4.1 :) for FlightGear-0.7.8; Thanks to booth teams - great
> work) I have gcc-2.95.2 and a normal SuSE 7.0.
>
> Any guesses what goes wrong ?

Yes - on some platforms socklen_t is an int, and on others an unsigned int.  It appears in these cases 'int' has been written rather
than socklen_t. So this code will work on some setups, but complain on others.

I don't have time right now to fix this myself, but I've sent this mail to the developers list so hopefully one of them can pick
this up.

Sam

Re: [Plib-users] Installing plib-1.4.1

[Steve B. <sjb...@ai...>]

Sam Stickland wrote:

> Yes - on some platforms socklen_t is an int, and on others an unsigned int.  It appears in these cases 'int' has been written rather
> than socklen_t. So this code will work on some setups, but complain on others.

Yes - but on yet others, socklen_t is not defined.

There is no way to avoid an ifdef here.  :-(

----------------------------- Steve Baker -------------------------------
HomeMail : <sjb...@ai...>   WorkMail: <sj...@li...>
HomePage : http://web2.airmail.net/sjbaker1
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           http://agtoys.sf.net   http://prettypoly.sf.net
           http://freeglut.sf.net http://toobular.sf.net

Re: [Plib-users] Installing plib-1.4.1

[Lars T. <to...@cs...>]

On Wed, 11 Jul 2001, Sam Stickland wrote:

> 
> ----- Original Message -----
> From: "Lars Tornow" <to...@cs...>
> To: <pli...@li...>
> Sent: Wednesday, July 11, 2001 8:47 PM
> Subject: [Plib-users] Installing plib-1.4.1
> 
> 
> > Hallo,
> >
> > I've got some problems installing plib version 1.4.1. The compiler says...
> >
> > c++ -DPACKAGE=\"plib\" -DVERSION=\"1.4.1\" -DHAVE_LIBDL=1 -DHAVE_LIBGL=1
> > -DHAVE_LIBGLU=1 -DHAVE_LIBGLUT=1 -DHAVE_GL_GL_H=1 -DHAVE_GL_GLU_H=1
> > -DLINUX_JOYSTICK_IS_PRESENT=1 -DGLUT_IS_PRESENT=1  -I. -I.
> > -I../../src/util  -I/usr/local/include  -g -O2 -O6 -Wall -c netSocket.cxx
> > netSocket.cxx: In method `int netSocket::accept(netAddress *)':
> > netSocket.cxx:217: passing `int *' as argument 3 of `accept(int, sockaddr
> > *, socklen_t *)' changes signedness
> > netSocket.cxx: In method `int netSocket::recvfrom(void *, int, int,
> > netAddress *)':
> > netSocket.cxx:254: passing `int *' as argument 6 of `recvfrom(int, void *,
> > unsigned int, int, sockaddr *, socklen_t *)' changes signedness
> > make: *** [netSocket.o] Error 1
> >
> > This happens only in version 1.4.0 and 1.4.1. Plib-1.2.0 compiles fine
> > (but I need 1.4.1 :) for FlightGear-0.7.8; Thanks to booth teams - great
> > work) I have gcc-2.95.2 and a normal SuSE 7.0.
> >
> > Any guesses what goes wrong ?
> 
> Yes - on some platforms socklen_t is an int, and on others an unsigned int.  It appears in these cases 'int' has been written rather
> than socklen_t. So this code will work on some setups, but complain on others.
> 
> I don't have time right now to fix this myself, but I've sent this mail to the developers list so hopefully one of them can pick
> this up.
> 
> Sam
> 

Hello, thanks for the quick answer. Looks like I have the wrong
environment :) Maybe I find some time to look at the problem myself, now
that I know what the problem is.

bye lars.

---------------------------------------------------------
          Real Programmers don't document - 
If it was hard to write, it should be hard to understand. 
---------------------------------------------------------

Re: [Plib-users] Installing plib-1.4.1

[Lars T. <to...@cs...>]

On Wed, 11 Jul 2001, Sam Stickland wrote:

> 
> ----- Original Message -----
> From: "Lars Tornow" <to...@cs...>
> To: <pli...@li...>
> Sent: Wednesday, July 11, 2001 8:47 PM
> Subject: [Plib-users] Installing plib-1.4.1
> 
> 
> > Hallo,
> >
> > I've got some problems installing plib version 1.4.1. The compiler says...
> >
> > c++ -DPACKAGE=\"plib\" -DVERSION=\"1.4.1\" -DHAVE_LIBDL=1 -DHAVE_LIBGL=1
> > -DHAVE_LIBGLU=1 -DHAVE_LIBGLUT=1 -DHAVE_GL_GL_H=1 -DHAVE_GL_GLU_H=1
> > -DLINUX_JOYSTICK_IS_PRESENT=1 -DGLUT_IS_PRESENT=1  -I. -I.
> > -I../../src/util  -I/usr/local/include  -g -O2 -O6 -Wall -c netSocket.cxx
> > netSocket.cxx: In method `int netSocket::accept(netAddress *)':
> > netSocket.cxx:217: passing `int *' as argument 3 of `accept(int, sockaddr
> > *, socklen_t *)' changes signedness
> > netSocket.cxx: In method `int netSocket::recvfrom(void *, int, int,
> > netAddress *)':
> > netSocket.cxx:254: passing `int *' as argument 6 of `recvfrom(int, void *,
> > unsigned int, int, sockaddr *, socklen_t *)' changes signedness
> > make: *** [netSocket.o] Error 1
> >
> > This happens only in version 1.4.0 and 1.4.1. Plib-1.2.0 compiles fine
> > (but I need 1.4.1 :) for FlightGear-0.7.8; Thanks to booth teams - great
> > work) I have gcc-2.95.2 and a normal SuSE 7.0.
> >
> > Any guesses what goes wrong ?
> 
> Yes - on some platforms socklen_t is an int, and on others an unsigned int.  It appears in these cases 'int' has been written rather
> than socklen_t. So this code will work on some setups, but complain on others.
> 
> I don't have time right now to fix this myself, but I've sent this mail to the developers list so hopefully one of them can pick
> this up.
> 
> Sam
> 

hello, 

I've found a quick solution for this:

an expicit cast to unsigned int

int
netSocket::accept ( netAddress* addr )
{
  assert ( handle != -1 ) ;
  socklen_t addr_len = sizeof(netAddress) ;
  return ::accept(handle,(sockaddr*)addr,&(unsigned int)addr_len);
}

I know it doesn't solve the problem on the root, but ... 
for me it works for now :)

bye lars.