[Buildroot] [PATCHv4] core/pkg-generic: check proper package installation

[Luca Ceresoli <luca@lucaceresoli.net>]

Dear Yann,

Yann E. MORIN wrote:
> Arnout, All,
>
> On 2015-11-06 23:55 +0100, Arnout Vandecappelle spake thusly:
>> On 06-11-15 20:15, Yann E. MORIN wrote:
>>> Some packages misbehave, and install files in either of;
>>>    - $(STAGING_DIR)/$(O) or $(TARGET_DIR)/$(O),
>>>    - $(STAGING_DIR)/$(HOST_DIR) or $(TARGET_DIR)/$(HOST_DIR).
>>>
>>> One common reason for that is that pkgconf now prepends the sysroot path
>>> to all the paths it returns. Other reasons vary, but are mostly due to
>>> poorly writen generic-packages.
>>>
>>> Add a check for those locations, as part of the command blocks for the
>>> target and staging installs.
>>>
>>> Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
>>> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
>>> Cc: Gustavo Zacarias <gustavo@zacarias.com.ar>
>>> Cc: Arnout Vandecappelle <arnout@mind.be>
>>> Cc: Peter Seiderer <ps.report@gmx.net>
>>> Cc: Romain Naour <romain.naour@openwide.fr>
>>>
[...]
>>> +		exit 1; \
>>> +	fi
>>
>>   I think it's better without this duplication so with a second parameter and
>> calling the function twice.
>
> Well, it's either duplication of the if-block, or duplication of the
> call sites. And I think it is better to have duplication of the
> if-blocks, in cas we need to check for mor eloactions, otherwise we'd
> have to duplicate even more the call sites...

Is it possible to make check-install-dirs (note the plural) just call
multiple times check-install-dir (singular), passing a different path
each time?

I'm sure you know all problems in computer science (except one) can be
solved by adding another level of indirection! :-)

Obviously this can be a future improvement, especially useful in case
the list of paths to check grew longer.

-- 
Luca