[Buildroot] [PATCH v2 2/6] zstd: add host libzstd support

Baruch Siach baruch at tkos.co.il
Thu Apr 12 03:33:17 UTC 2018


Hi Yann,

On Wed, Apr 11, 2018 at 11:19:07PM +0200, Yann E. MORIN wrote:
> On 2018-04-09 22:04 +0200, Peter Seiderer spake thusly:
> > Signed-off-by: Peter Seiderer <ps.report at gmx.net>
> > ---
> > Changes v1 -> v2:
> >   - split off host libzstd support (suggested by Yann E. MORIN)
> >   - no ZSTD_OPTS for host libarary build
> > ---
> >  package/zstd/zstd.mk | 12 ++++++++++++
> >  1 file changed, 12 insertions(+)
> > 
> > diff --git a/package/zstd/zstd.mk b/package/zstd/zstd.mk
> > index c0fa88026c..1b76b0164c 100644
> > --- a/package/zstd/zstd.mk
> > +++ b/package/zstd/zstd.mk
> > @@ -46,4 +46,16 @@ define ZSTD_INSTALL_TARGET_CMDS
> >  		DESTDIR=$(TARGET_DIR) PREFIX=/usr -C $(@D)/programs install
> >  endef
> >  
> > +# note: no 'HAVE_...' options for host library build only 
> > +define HOST_ZSTD_BUILD_CMDS
> > +	$(HOST_MAKE_ENV) $(HOST_CONFIGURE_OPTS) $(MAKE) \
> > +		-C $(@D) lib
> > +endef
> > +
> > +define HOST_ZSTD_INSTALL_CMDS
> > +	$(HOST_MAKE_ENV) $(HOST_CONFIGURE_OPTS) $(MAKE) \
> > +		DESTDIR=$(HOST_DIR) PREFIX=/usr -C $(@D)/lib install
> > +endef
> > +
> >  $(eval $(generic-package))
> > +$(eval $(host-generic-package))
> 
> The target variant has optional dependencies on zlib, xz, and lz4, which
> all have host variants.
> 
> So, if you don;t specify the dependency in the host-zstd, you get a
> host-zstd that may or may not have support for zlib, xz, or lz4,
> depending on hether another package a dependency on them.
> 
> We don't have spport for optional host dependencies (because there are
> not config options for those host packages), so I don't see a solution
> but to always depend on all three. So:
> 
>     HOST_ZSTD_DEPENDENCIES = host-lz4 host-xz host-zlib

Why? The build should still consistent for a given config. If you add/remove 
other packages you might get host-zstd build with different dependencies. This 
is normal. Target packages behave the same way.

baruch

-- 
     http://baruch.siach.name/blog/                  ~. .~   Tk Open Systems
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