[bug-inetutils] Re: [patches] man/Makefile.am, telnetd/telnetd.c, ifconfig/if_index.c

[Mats Erik Andersson]

tisdag den 21 september 2010 klockan 12:32 skrev Simon Josefsson detta:
> Mats Erik Andersson <address@hidden> writes:
> 
> > Without the proposed change, OpenBSD comes to a halt with a cryptic
> > message about clashing prototypes for free(3). The explanation is
> > that OpenBSD uses
> >
> >     ### /usr/include/net/if.h
> >
> >     #define if_freenameindex(x) free(x)
> >
> > The corresponding function in GNU/Linux is a true function!
> 
> Interesting.  According to POSIX:
> 
> http://www.opengroup.org/onlinepubs/9699919799/functions/if_freenameindex.html
> 
> It should be a real function.  Could you report this as a OpenBSD bug?
> 
> It does sounds as if this is something that gnulib could offer a working
> replacement for, instead of InetUtils using a hack.  It looks like an
> OpenBSD bug that would affect other applications too.
> 
> The exact compile error would help in understanding why things fail
> here.  Could you create a small example that reproduce the problem?
> E.g. something like:
> 
> #include <net/if.h>
> int main (void) { if_freenameindex ((void*)0); }
> 
> or something like that?  And then quote the compile error.

Well, no compile error will arise in such a minimal program.
The problem is rather that the macro definition in OpenBSD
will affect the two files

    inetutils/ifconfig/if_index.h

    inetutils/ifconfig/if_index.c

into replacing every "if_freenameindex" with "free", thus causing
the most unpleasant namespace collisions. I will send a reminder to
bug-gnulib to be safe, though.

Mats E A