On 01/18/2013 01:45 PM, Martin Jansa wrote:
On Fri, Jan 18, 2013 at 04:35:34PM -0500, Robert P. J. Day wrote:
perusing oe-core for examples to demonstrate the concept of
"PROVIDES =", and i ran across this in recipes-devtools/dpkg/dpkg.inc:
PROV = "virtual/update-alternatives"
PROV_class-native = ""
PROV is variable with no special meaning
class-native is standard override for native recipe (like
virtclass-native was before).
PROVIDES += "${PROV}"
i'm not sure what to make of that -- what's the purpose of assigning
to PROV, then subsequently assigning to PROVIDES, but with that
PROV_class-native = ""
line in between? i did a grep and saw nothing else like it throughout
oe-core.
I believe that idea is since it's PROVIDES += , not a straight
assignment like = it's not a simple to override with the +=, so for the
target case PROVIDE the virtual/u-a, but not for the native case of that
package.
If it was a straight assignment (using =) the ${PROV} would not be needed.
Sau!
rday
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Robert P. J. Day Ottawa, Ontario, CANADA
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