I thought I'd bring this up here, since John pointed out that it
should belong here.
I'm not a developer anymore, but I'd like to get this straightened out.

Basically it started with this:

===========================================
Trying to build C5.08 on gentoo so that I can build the java wrapper
(to try AVSynthesis). Rcv'd the following error. Google turns up only
one search that didn't help.

usr/X11R6/include OOps/remote.c
OOps/remote.c: In function 'getIpAddress':
OOps/remote.c:70: error: storage size of 'ifr' isn't known
scons: *** [OOps/remote.os] Error 1
scons: building terminated because of errors.
===========================================

And it's been pointed out that it's most likely a gentoo configuration
issue. For some reason, gentoo include the ifreq struct, located in
net/if.h. First, for gcc to find the right directory (gentoo dist.) I
had to edit the custom.py file:

customCPPPATH = ['-I/usr/include/gentoo-multilib/amd64/']

That included the file, but still I received the same error. Here's
the latest thread from John and then my reply.

Please ask questions of what I've missed to tell you about this issue.

===========================================

....Really this belongs on the csound-dev list but as it started
here....

In remote.c the code reads
#ifdef LINUX
#include <linux/if.h>
#include <arpa/inet.h>
#endif
#include <net/if.h>

and this works on SuSE, Debian and Fedora (at least).  However on
gentoo the file <linux/if.h> is frankly incomprensible

#ifndef _LINUX_IF_H
# include <net/if.h>
# define _LINUX_IF_H
#endif

#ifndef _LINUX_IF_H
#define _LINUX_IF_H
.....

So as _LINUX_IF_H is not set it reads <net/if.h>, and then sets the
variable so it ignores the rest of the file.
I really suspect that the first #ifndef should use _NET_IF_H but it
does not.  I cannot see how one can use thee headers.

==John ffitch
	
	
On Fri, Jul 25, 2008 at 3:16 AM, jpff <jpff@codemist.co.uk> wrote:
> ....Really this belongs on the csound-dev list but as it started
> here....
>
> In remote.c the code reads
> #ifdef LINUX
> #include <linux/if.h>
> #include <arpa/inet.h>
> #endif
> #include <net/if.h>
>
> and this works on SuSE, Debian and Fedora (at least).  However on
> gentoo the file <linux/if.h> is frankly incomprensible
>
> #ifndef _LINUX_IF_H
> # include <net/if.h>
> # define _LINUX_IF_H
> #endif
>
> #ifndef _LINUX_IF_H
> #define _LINUX_IF_H

my if.h does not have:

#ifndef _LINUX_IF_H
# include <net/if.h>
# define _LINUX_IF_H
#endif

but it does have:

#ifndef _NET_IF_H
#define _NET_IF_H       1

but that's the only place it shows up on if.h. It's not used in the
rest of the file.

> .....
>
> So as _LINUX_IF_H is not set it reads <net/if.h>, and then sets the
> variable so it ignores the rest of the file.
> I really suspect that the first #ifndef should use _NET_IF_H but it
> does not.  I cannot see how one can use thee headers.

Why would it ignore the rest of the file? It only defines
'_LINUX_IF_H', and nothing more. there is no else after the
definition.

It looks like '#ifdef __USE_MISC' is the culprit as struct ifreq is
included in this #define. I don't know what __USE_MISC is.

brad

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