[Buildroot] [RFC] New package: QSerialDevice

Thomas De Schampheleire patrickdepinguin+buildroot at gmail.com
Tue Oct 25 09:29:24 UTC 2011

Hi Yegor,

On Tue, Oct 25, 2011 at 11:22 AM, Yegor Yefremov
<yegor_sub1 at visionsystems.de> wrote:
> Am 25.10.2011 10:17, schrieb Thomas Petazzoni:
>> Le Tue, 25 Oct 2011 09:22:34 +0200,
>> Yegor Yefremov <yegor_sub1 at visionsystems.de> a écrit :
>>> 1. I fetch it from git branch, how can I specify revision?
>> pkg_VERSION = ...
>> You can specify a git branch, a git commit, whatever commit identifier
>> that is valid for git.
> But how can I combine branch name together with commit? I've already specified branch "2.0" as QSERIALDEVICE_VERSION.

The commit uniquely identifies a particular revision, whatever branch
it is on. So once you specify the commit, the branch is automatically

>>> 2. how do I handle symlinking for libraries? If I just copy all 4
>>> files, I get 4 same files and not one library and 3 symlinks
>> Either use the "make install" of the package (or implement it), or use
>> ln to create the symlinks.
> O.K. I thought there would be some kind of elegant and easy way, like an option that copies only symlink and not it's target if desired :-)

If you want to copy an existing link and not the link target, you can
use 'cp -P' : (from 'man cp')
       -P, --no-dereference
              never follow symbolic links

>>> 3. what
>>> about creating some kind of folders/menu (in package/Config.in) for
>>> Qt, python etc. add-ons?
>> I don't know. qserialdevice should go in Libraries -> Hardware
>> handling. I don't see why it would need to end up in a qt-specific
>> submenu.
> O.K.
>>> +    $(QT_QMAKE) $(@D)/serialport.pro
>>> +endef
>> Should be:
>>       (cd $(@D); $(QT_QMAKE) serialport.pro)
> You won't believe me, but it worked without cd statement. That's why I was puzzled by my local package not willing to create Makefile in output/build/vsguitest. But I fix it for QSerialDevice for conformance sake.
>> Does it *absolutely* require udev ? I have never used QSerialDevice,
>> but QExtSerialPort instead, and udev wasn't necessary.
> It requires both build-time and run-time udev. This package provides two classes/interfaces:
> 1. serial port itself
> 2. informational class containing all installed serial port sin the system and it uses libudev (I'll send a patch that installs udev in staging)

Best regards,

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