Re: [Qemu-trivial] [PATCH 4/4] fix compilation when reconfiguring without dtrace backend

[Stefan Hajnoczi]

On Mon, May 9, 2011 at 9:42 AM, Paolo Bonzini <address@hidden> wrote:
> On 05/09/2011 10:34 AM, Stefan Hajnoczi wrote:
>> Is there some smart change detection you are thinking about or just
>> something like keeping the old copy of config-host.h and friends to
>> see if they have changed?
>
> Just that, perhaps for both .h and .mak files.  Consider this very patch; it
> is plausible that switching to another tracing backend does not change the
> .h files, right now the backend is only present in .h files to enable the
> monitor/cmdline interfaces.

Hmm...I was wrong when I said that just deleting .d files is enough.
If ./configure is run *and* an arbitrary header file was changed then
stale .o files will be used.  So we also need to delete .o files on
./configure.

Stefan