[Rock-dev] Component not linking external library

[Sylvain Joyeux]

Hi Eduardo

Your ethernet driver library is empty (at least on github), so where is the
EthernetDrivers::GPIOin_Driver class supposed to come from ? Is that coming
with the device's library ? If it is the case, consider creating a custom
handler in your autoproj package set that installs it and generates a
pkg-config file. You can have a look for instance at how the drivers/aria
package is handled in remotes/rock/libs.autobuild.

I would also recommend that you follow Rock's guidelines on naming ...
consistency usually helps

http://rock-robotics.org/stable/documentation/packages/package_structure.html
  http://rock.opendfki.de/wiki/WikiStart/Standards/RG4

Sylvain


On Wed, Apr 16, 2014 at 7:43 PM, Eduardo Elael <eduardo.elael at tenkel.com>wrote:

> Hello,
>
> I'm using an ethernet based device which has it's own library ( a header
> ".h" and a external library ".so" ). When I created my rock library I added
> two lines to my Cmakelist: "HEADERS the_lib.h" and "LIBS
> /the/path/the_lib86x64.so". Doing that it compiled fine (through amake).
>
> Then, when I try to create a rock-component using this rock-library the
> amake returns errors showing "undefined reference"'s to functions
> implemented in the "the_lib86x64.so".
>
> So I tried copying the "the_lib86x64.so" to Rock/install/lib, I don't know
> if it's the correct way, but now I get the error:
>
> "Linking CXX executable orogen_default_inductive__Task
>     tasks/libinductive-tasks-gnulinux.so: undefined reference to
> `EthernetDrivers::GPIOin_Driver::read(bool*)' "
>
> Where "inductive" is my component name, and
> "EthernetDrivers::GPIOin_Driver::read(bool*)" is a method from a class
> defined in my rock-library.
>
> The actual state of my code:
>
> rock-library:
> https://github.com/OpenLEAD/EthernetDriver
>
> rock-component:
> https://github.com/OpenLEAD/InductiveS
>
> Thanks in advance,
> Eduardo Elael
>
> Coppetec/LEAD
>
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>
>
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