[OE-core] what is meaning of "SRC_URI_append_whatever +=" ??

[Koen Kooi]

Op 21 mrt. 2012, om 11:28 heeft Robert P. J. Day het volgende geschreven:

> On Wed, 21 Mar 2012, Robert P. J. Day wrote:
> 
>> 
>>  still perusing the very basics of oe-core and grepping madly, came
>> across the following oddity:
>> 
>> $ grep -r SRC_URI_append *
>> ... snip ...
>> bitbake/doc/manual/usermanual.xml:SRC_URI_append_1.0.7+ = "file://some_patch_which_the_new_versions_need.patch;patch=1"</screen></para>
>> meta/recipes-support/gmp/gmp_5.0.4.bb:SRC_URI_append += "file://use-includedir.patch \
>> meta/recipes-support/libcroco/libcroco_0.6.3.bb:SRC_URI_append = " file://croco.patch;apply=yes "
>> ... snip ...
>> 
>>  AIUI, there are two (common) variations for extending SRC_URI.  the
>> straightforward unconditional way:
>> 
>>  SRC_URI += ... blah blah ...
>> 
>> or if you need to make it conditional, then there's
>> 
>>  SRC_URI_append_thingy = "whatever"
>> 
>> so what's with the latter two entries above?
>> 
>> meta/recipes-support/gmp/gmp_5.0.4.bb:SRC_URI_append += "file://use-includedir.patch \
>> meta/recipes-support/libcroco/libcroco_0.6.3.bb:SRC_URI_append = " file://croco.patch;apply=yes "
>> 
>>  is there some subtlety i'm missing here?  why would one ever use
>> either of:
>> 
>>  SRC_URI_append += "..."               (looks redundant)
>>  SRC_URI_append = "..."                (why not just SRC_URI +=?)
>> 
>> can i just assume those are typoes?
> 
>  following up on my own post, i decided to scan the entire oe-core
> tree:
> 
> $ grep -r "_append +=" *
> meta/recipes-support/gmp/gmp_5.0.4.bb:SRC_URI_append += "file://use-includedir.patch \
> meta/recipes-core/eglibc/eglibc-package.inc:FILES_${PN}-dev_append += "${bindir}/rpcgen ${libdir}/*_nonshared.a \
> meta/recipes-core/eglibc/eglibc-package.inc:FILES_${PN}-staticdev_append += "${libdir}/*.a ${base_libdir}/*.a"
> meta/recipes-graphics/xorg-lib/libxp_1.0.1.bb:CFLAGS_append += " -I ${S}/include/X11/XprintUtil -I ${S}/include/X11/extensions"
> $
> 
>  and i thought i'd look for another pattern as well:
> 
> $ grep -r "_append_.*+=" *
> meta/recipes-graphics/tslib/tslib_1.0.bb:SRC_URI_append_qemumips += " file://32bitBE-support.patch"
> meta/recipes-graphics/tslib/tslib_1.0.bb:SRC_URI_append_qemuppc += " file://32bitBE-support.patch"
> meta/recipes-sato/leafpad/leafpad_0.8.18.1.bb:SRC_URI_append_poky += " file://owl-menu.patch;apply=yes "
> $
> 
>  of course, if all of the above is perfectly valid, i'm going to be
> embarrassed.


AFAICT '_append +=' is completely bogus.

regards,

Koen