Bug#694759: linux-tools-3.6: Wrong KERNEL_ARCH_PERF set for amd64

[Mike Hommey <mh@glandium.org>]

On Sat, Dec 01, 2012 at 10:17:54PM +0000, Ben Hutchings wrote:
> On Thu, 2012-11-29 at 23:40 +0100, Mike Hommey wrote:
> > Package: linux-tools-3.6
> > Version: 3.6-1~experimental.1
> > Severity: important
> > 
> > debian/build/tools/perf/Makefile reads:
> >   else ifeq ($(DEB_HOST_ARCH_CPU),amd64)
> >     KERNEL_ARCH_PERF = x86
> > 
> > This should really be:
> >   else ifeq ($(DEB_HOST_ARCH_CPU),amd64)
> >     KERNEL_ARCH_PERF = x86_64
> > 
> > Because tools/perf/Makefile has special cases for ARCH=x86_64. This is
> > especially important on 3.7 when building with libunwind.
> 
> This doesn't work (by itself) because tools/perf/Makefile needs to
> change ARCH from x86_64 to x86, and that won't happen if we specify ARCH
> on the command line.  Possibly we need to pass it as an environment
> variable instead...

It uses override to do that, which, heh, overrides what's given on the
command line. I successfully built linux-tools-3.7 with libunwind
support and ARCH=x86_64 that way (libunwind support doesn't build
without ARCH=x86_64 because it lacks the necessary -l flag which is only
set with ARCH=x86_64)

Mike