Re: [Xen-devel] [PATCH] xen: Don't use -nostdinc flags with CLANG

[Tim Deegan <tim@xxxxxxx>]

At 12:30 +0000 on 11 Feb (1392118227), Julien Grall wrote:
> 
> 
> On 11/02/14 08:53, Tim Deegan wrote:
> > At 23:29 +0000 on 10 Feb (1392071374), Julien Grall wrote:
> >> Commit 06a9c7e "xen: move -nostdinc into common Rules.mk." breaks
> >> compilation with clang:
> >>
> >> In file included from sched_sedf.c:8:
> >> In file included from /home/julieng/works/xen/xen/include/xen/lib.h:5:
> >> /home/julieng/works/xen/xen/include/xen/stdarg.h:20:12: error: 'stdarg.h' 
> >> file
> >> not found with <angled> include; use "quotes" instead
> >>             ^~~~~~~~~~
> >>             "stdarg.h"
> >
> > Looks like on your system stdarg.h doesn't live in a compiler-specific
> > path, like we have for the BSDs.  I think we should just go to using
> > our own definitions for stdarg/stdbool everywhere; trying to chase the
> > compiler-specific versions around is a PITA, and the pieces we
> > actually need are trivial.
> 
> For BSDs, we are using our own stdargs/stdbool.  So we don't include the 
> system <stdarg.h>.
> 
> Linux is using $(CC) -print-file-name=include to get the right path. It 
> works with both gcc and clang on Linux distos, but not on FreeBSD.

Wait - is the error message you posted from clang on FreeBSD?
That's surprising; on FreeBSD xen/stdarg.h shouldn't be trying to
include <stdarg.h> at all.  Is __FreeBSD__ not being defined?

Tim.

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