[oe] RFC: "Virtual" native and sdk recipes

[Robert Schuster]

Hi Richard,
I somehow missed this thread.

Richard Purdie schrieb:
> Proposal Step A:
> 
> Having to set:
> 
> FILESDIR = "${@os.path.dirname(bb.data.getVar('FILE',d,1))}/foo-${PV}"
> 
> and
> 
> S = "${WORKDIR}/foo-${PV}
> 
> is fairly pointless and it would be nice the the defaults just did the
> right thing. 
> 
> http://git.pokylinux.org/cgit.cgi/poky/commit/?h=experimental-virtualnative&id=b8f0510a5567f6d1b90934fe513fd40423f11086
> 
> is a patch introducing BASEPN which is PN with a range of specified
> suffixes removed (-native, -cross-sdk, -cross, -sdk as specified by
> SPECIAL_PKGSUFFIX).
> 
> FILESPATH and S can then be constructed with BASEPN instead of PN
> removing the need to need to hardcode them:
> 
> http://git.pokylinux.org/cgit.cgi/poky/commit/?h=experimental-virtualnative&id=ed829661d51b8f23628e97404ed507c2e56d8495
> 
> This reduces my hypothetical example to:
> 
> foo/foo.inc:
> 
> SRC_URI = "http://somwehere/${BASEPN}-${PV}.tar.bz2 \
>            file://some.patch;patch=1"
> inherit autotools
> 
> foo/foo-native_1.0.bb:
> require foo_${PV}.bb
> inherit native
> 
> The above proposal is worthwhile in itself alone.
Like koen said we have something like this in OE already but your
implementation looks better:

a) BASEPN, BASEP instead of BPN, BP:
This is less prone to be confused with "B". Furthermore I just tried to
put the BPN code into my local Poky and it turned out that somehow BPN
and BP are not set by the 'base_package_name' although its the same code
as in OE's org.oe.dev. There not many packages in OE which use BPN/BP so
we can quickly rename those that do.

I use BP/BPN more extensively in Jalimo but I already have a patch to
fix this.

b) Use of SPECIAL_PKGSUFFIX variable to define known suffixes
In OE's implementation this is hardcoded in the function code. Not so
nice but heck I am no python coder. :$

Regards
Robert


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