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diff --git a/results/scraper/launchpad/1813305 b/results/scraper/launchpad/1813305
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+trace-root.h is not regerenerated after re-configure
+
+Hi,
+
+I've just realized that after I reconfigured my qemu with
+../configure --target-list=arm-softmmu,arm-linux-user,aarch64-softmmu,aarch64-linux-user --enable-trace-backends=simple
+
+$ make
+did rebuild some stuff for the 'simple' trace, but it did not update trace-root.h until after I
+$ make clean
+
+
+I took me while to understand why I didn't get the traces I wanted (my trace-root.h still thought it was configured for the default 'log').
+
+I didn't check how easy it is to fix this in the build system.
+
+Thanks
+
+On Fri, Jan 25, 2019 at 02:03:39PM -0000, Christophe Lyon wrote:
+> I've just realized that after I reconfigured my qemu with
+> ../configure --target-list=arm-softmmu,arm-linux-user,aarch64-softmmu,aarch64-linux-user --enable-trace-backends=simple
+> 
+> $ make
+> did rebuild some stuff for the 'simple' trace, but it did not update trace-root.h until after I
+> $ make clean
+> 
+> 
+> I took me while to understand why I didn't get the traces I wanted (my trace-root.h still thought it was configured for the default 'log').
+> 
+> I didn't check how easy it is to fix this in the build system.
+
+Thank you for reporting this.  I have sent a patch to fix the makefile.
+
+Stefan
+
+
+On Tue, 29 Jan 2019 at 03:55, Stefan Hajnoczi <email address hidden> wrote:
+>
+> On Fri, Jan 25, 2019 at 02:03:39PM -0000, Christophe Lyon wrote:
+> > I've just realized that after I reconfigured my qemu with
+> > ../configure --target-list=arm-softmmu,arm-linux-user,aarch64-softmmu,aarch64-linux-user --enable-trace-backends=simple
+> >
+> > $ make
+> > did rebuild some stuff for the 'simple' trace, but it did not update trace-root.h until after I
+> > $ make clean
+> >
+> >
+> > I took me while to understand why I didn't get the traces I wanted (my trace-root.h still thought it was configured for the default 'log').
+> >
+> > I didn't check how easy it is to fix this in the build system.
+>
+> Thank you for reporting this.  I have sent a patch to fix the makefile.
+>
+
+Thanks for the quick patch.
+
+> Stefan
+
+
+This was fixed by commit 57b7bdf426445d83561, which will be in the 4.0 release.
+
+