compilation problems with some code from Linux

[Andrew Falanga]

On 12/8/06, Lane <lane at joeandlane.com> wrote:
>
> On Friday 08 December 2006 11:21, Andrew Falanga wrote:
> > Hi,
> >
> > I'm trying to port some code from Linux to FreeBSD and I've got an issue
> > that revolves around something I've never dealt with before.  The code
> > includes the following header:
> >
> > #include <sys/ucred.h>
> >
> > Apparently, program is attempting to make use of the xucred structure
> > defined in there, because the rest of the stuff in the file seems to be
> for
> > the kernel.  However, when I try to compile, gcc continually bails with
> the
> > following error (among others), "NGROUPS was not declared in this
> scope."
> > The NGROUPS appears to be a macro, but it's not defined earlier
> on.  Would
> > anyone here know where it's defined so I can include that file too?
> >
> > Secondly, I'm also getting errors because gcc can't find <sys/vfs.h>
> > either.  True enough, there isn't any vfs.h file in /usr/include/sys.
> > Since this file is in Linux, what should I include for FreeBSD?
> >
> > Thanks,
> > Andy
> > _______________________________________________
> > freebsd-questions at freebsd.org mailing list
> > http://lists.freebsd.org/mailman/listinfo/freebsd-questions
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> > "freebsd-questions-unsubscribe at freebsd.org"
> Andy,
>
> I won't pretend to know exactly which header files correspond for your
> port,
> but in the past I've found some things that work for me:
>
> use
>
> locate vfs.h
>
> to find similar file names.  On 6.x and 5.x I see that these are possible
> candidates:
>
> /usr/X11R6/include/gnome-vfs-2.0/libgnomevfs/gnome-vfs.h
> /usr/include/fs/devfs/devfs.h
> /usr/include/sys/statvfs.h
> /usr/local/include/af_vfs.h
> /usr/src/sys/compat/svr4/svr4_statvfs.h
> /usr/src/sys/fs/devfs/devfs.h
> /usr/src/sys/nfs4client/nfs4_vfs.h
> /usr/src/sys/sys/statvfs.h
>
>
> But you'd have to compare the functions and structures defined in
> sys/vfs.h on
> linux to determine which is your best match up.
>
> There is /usr/ports/devel/mipsel-linux-kernel-headers/ which, according to
> pkg-plist will install mipsel-linux/include/linux/vfs.h.  That may be
> exactly
> what you need (although it may be overkill).  Or it may be the LAST thing
> you
> need :)
>
> Sometimes a porter will simply create a patch file
> in /usr/ports/<portname>/files that will create a skeleton version of the
> file which includes only the items you need.  I've done this for
> development
> on my own system.
>
> As far as the NGROUP or other macros ... yikes!  You may have to recreate
> that
> functionality entirely.
>
> I ran this:
>
> #!/bin/sh
> for each in `locate  .h | grep '\.h$'`
> do
> if [ -f $each ]; then
> MYF=`cat $each | grep -i ngroups`
> if [ "x$MYF" != "x" ]; then
>         echo $each : "$MYF"
> fi
> MYF=""
> fi
> done
>
>
> It could probably be done more easily with sed and some elbow grease, but
> it
> does show NGROUPS defined here:
>
> /usr/X11R6/include/X11/Xos.h : #define NGROUPS 16
>
> and
>
> /usr/include/sys/param.h
>
> among other places.
>
> Good luck!
>
> lane
> _______________________________________________
> freebsd-questions at freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-questions
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> freebsd-questions-unsubscribe at freebsd.org"
>



Thank you everyone.  I'm sorry that I didn't reply sooner.  I did get this
worked out, but unfortunately I don't remember the include file I had to
use.  I found in a different file than the one I was editing at the time I
wrote this a nice comment explaining why the "#include <sys/vfs.h>"
preprocessor directive was there.  I found that function in a different
include file for FreeBSD, changed the code and all was well.

Thanks again.

Andy