[yocto] setting preferred provider for "virtual/libx11"?

[Robert P. J. Day]

  with latest poky git pull, did "bitbake -c fetchall world" just for
fun and got:

NOTE: Resolving any missing task queue dependencies
NOTE: Preparing runqueue
ERROR: Multiple .bb files are due to be built which each provide
virtual/libx11
(/home/rpjday/yocto/poky.git/meta/recipes-graphics/xorg-lib/libx11-trim_1.3.4.bb
/home/rpjday/yocto/poky.git/meta/recipes-graphics/xorg-lib/libx11_1.3.4.bb).
 This usually means one provides something the other doesn't and
should.
NOTE: Executing SetScene Tasks
NOTE: Executing RunQueue Tasks
NOTE: Tasks Summary: Attempted 1359 tasks of which 1359 didn't need to
be rerun and 0 failed.

  i'm *assuming* that, since both of those .bb files pull in
libx11.inc, this is the offending line from that libx11.inc file:

PROVIDES = "virtual/libx11"

and that (as saul just explained to me before his linuxcon talk
starts), what is needed is a PREFERRED_PROVIDER for this virtual
package to distinguish between them, correct?

  i can see several directives throughout the tree:

PREFERRED_PROVIDER_virtual/libx11 ?= "libx11-trim"

but, obviously(?), there's none being included in my specific example
of doing a fetchall for world.  feel free to explain why i have no
idea what i'm talking about.

rday

-- 

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Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
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