Compiling grub2 on OpenBSD

Compiling grub2 on OpenBSD

[walt]

I got grub2 compiled on NetBSD, so now on to OpenBSD:

In file included from ../util/i386/pc/grub-mkimage.c:29:
../include/grub/misc.h:43: warning: conflicting types for built-in function `memcpy'
In file included from ../util/i386/pc/grub-mkimage.c:33:
/usr/include/string.h:60: error: conflicting types for `memcpy'
../include/grub/misc.h:43: error: previous declaration of `memcpy'

And here is the offending definition from /usr/include/string.h:

void    *memcpy(void *, const void *, size_t)
                 __attribute__ ((__bounded__(__buffer__,1,3)))
                 __attribute__ ((__bounded__(__buffer__,2,3)));

This is only the first of many such weird things I expect to
show up.  (OpenBSD has blazed its own trail to another planet
over the years :o)

Re: Compiling grub2 on OpenBSD

[Robert Millan]

On Fri, Feb 01, 2008 at 12:49:11PM -0800, walt wrote:
> I got grub2 compiled on NetBSD, so now on to OpenBSD:
> 
> In file included from ../util/i386/pc/grub-mkimage.c:29:
> ../include/grub/misc.h:43: warning: conflicting types for built-in function 
> `memcpy'
> In file included from ../util/i386/pc/grub-mkimage.c:33:
> /usr/include/string.h:60: error: conflicting types for `memcpy'
> ../include/grub/misc.h:43: error: previous declaration of `memcpy'

Sounds strange.  Why do we have memcpy at all?  Shouldn't it be grub_memcpy?

Redeclaring system-provided functions this way is asking for trouble...

-- 
Robert Millan

<GPLv2> I know my rights; I want my phone call!
<DRM> What use is a phone call… if you are unable to speak?
(as seen on /.)

Re: Compiling grub2 on OpenBSD

[Yoshinori K. Okuji]

On Friday 01 February 2008 22:41, Robert Millan wrote:
> On Fri, Feb 01, 2008 at 12:49:11PM -0800, walt wrote:
> > I got grub2 compiled on NetBSD, so now on to OpenBSD:
> >
> > In file included from ../util/i386/pc/grub-mkimage.c:29:
> > ../include/grub/misc.h:43: warning: conflicting types for built-in
> > function `memcpy'
> > In file included from ../util/i386/pc/grub-mkimage.c:33:
> > /usr/include/string.h:60: error: conflicting types for `memcpy'
> > ../include/grub/misc.h:43: error: previous declaration of `memcpy'
>
> Sounds strange.  Why do we have memcpy at all?  Shouldn't it be
> grub_memcpy?

IIRC, GCC implicitly generates references to memcpy, thus somebody has added 
memcpy as an alias to grub_memcpy.

I don't know how to solve it cleanly. If you have an idea, I'd like to know.

Okuji