Re: [Xen-devel] [PATCH] tools/firmware: pass EXTRAVERSION to seabios build

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Tue, May 30, 2017 at 12:33:15PM +0100, Wei Liu wrote:
> On Mon, May 29, 2017 at 09:57:58AM +0200, Olaf Hering wrote:
> > On Fri, May 26, Ian Jackson wrote:
> > 
> > > This seems like a real problem which should be improved.  But maybe we
> > > should use Xen's EXTRAVERSION by default ?
> > 
> > After thinking about it, why does the tools build not just enforce a
> > fixed string? There is no point for scripts/buildversion.py to put
> > current time and buildhost into the binary. This breaks reproducible
> > builds. A simple, untested change like this should be enough:
> > 
> > diff --git a/tools/firmware/Makefile b/tools/firmware/Makefile
> > index 8562f547bc..c2b5985dc7 100644
> > --- a/tools/firmware/Makefile
> > +++ b/tools/firmware/Makefile
> > @@ -22,6 +22,8 @@ ovmf-dir:
> >  seabios-dir:
> >     GIT=$(GIT) $(XEN_ROOT)/scripts/git-checkout.sh $(SEABIOS_UPSTREAM_URL) 
> > $(SEABIOS_UPSTREAM_REVISION) seabios-dir
> >     cp seabios-config seabios-dir/.config;
> > +   rm -f seabios-dir/.version
> > +   echo '$(SEABIOS_UPSTREAM_REVISION)' > seabios-dir/.version
> 
> Please consider adding a comment before this snippet saying this is for
> reproducible build.
> 
> >     $(MAKE) -C seabios-dir olddefconfig
> >  
> >  .PHONY: all
> > @@ -35,7 +37,7 @@ ifeq ($(CONFIG_ROMBIOS),y)
> >     false ; \
> >     fi
> >  endif
> > -   $(MAKE) $(LD32BIT-y) CC=$(CC) PYTHON=$(PYTHON) subdirs-$@
> > +   $(MAKE) $(LD32BIT-y) CC=$(CC) PYTHON=$(PYTHON) EXTRAVERSION="-Xen" 
> > subdirs-$@
> 
> Why is this needed?
> 

What I meant was: this is passing EXTRAVERSION to all subdir targets,
which seems unnecessary to me. And you already specified a version
string for seabios.

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