On Sat, 8 Feb 2020, Jonatan Palsson wrote:
> Hello Robert & Leon,
>
> > So I think it might be harmful to replace it with "=", as it would no
> > longer provide libpcre.
>
> I had a look at the variable expansions bitbake -e. Here are two
> examples. The vim recipe uses "PROVIDES = xxd" (which would cause
> weird effects if = simply overwrote any existing ${PN} value), and the
> libpcre2 recipe uses "PROVIDES += pcre2", as already mentioned.
>
> vim:
> # $PROVIDES [4 operations]
> # set ... /poky/meta/conf/bitbake.conf:275
> # ""
> # _prepend ... /poky/meta/conf/bitbake.conf:276
> # "${PN} "
> # set ... /poky/meta/conf/documentation.conf:335
> # [doc] "A list of aliases that a recipe also provides. ... SNIP ...
> # set ... /poky/meta/recipes-support/vim/vim_8.2.bb:3
> # "xxd"
> # pre-expansion value:
> # "${PN} xxd"
> PROVIDES="vim xxd"
>
> libpcre2:
> # $PROVIDES [4 operations]
> # set ... /poky/meta/conf/bitbake.conf:275
> # ""
> # _prepend ... /poky/meta/conf/bitbake.conf:276
> # "${PN} "
> # set ... /poky/meta/conf/documentation.conf:335
> # [doc] "A list of aliases that a recipe also provides. ... SNIP ....
> # append ... /poky/meta/recipes-support/libpcre/libpcre2_10.33.bb:24
> # "pcre2"
> # pre-expansion value:
> # "${PN} pcre2"
> PROVIDES="libpcre2 pcre2"
argh ... that is, of course, what i should have done first, just
check the environment for the recipe. ok, that pretty much confirms
that, barring some exceptional circumstances, most instances of
"PROVIDES +=" are not harmful, just redundant.
rday
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