This should probably be filed as a bug report ticket on rosbuild
(sounds like the target name generation needs to be different):

https://code.ros.org/trac/ros/newticket?component=ros&type=defect&&ros

cheers,
Ken

On Wed, Sep 14, 2011 at 8:39 AM, Weißhardt, Florian
<Florian.Weisshardt@ipa.fraunhofer.de> wrote:
> Hi,
>
> I am using the rosbuild_add_roslaunch_check() macro from rosbuild to test
> launch files. It is a great tool which is very useful and works fine. The
> problem I am facing is that it is not possible to declare two tests of the
> same launch file with different environment variables.
>
> E.g. I would like to use:
>     rosbuild_add_roslaunch_check(ros/launch/mylaunch.launch VAR1=foo)
>     rosbuild_add_roslaunch_check(ros/launch/mylaunch.launch VAR1=bar)
>
> but this ends up in an error:
>     CMake Error: Attempt to add a custom rule to output
> ".../roslaunch_check_ros_launch_mylaunch.launch.rule" which already has a
> custom rule.
>     -- Configuring incomplete, errors occurred!
>     make: *** [all] Error 1
>
> Is there a way to use the macro multiple times for the same launch file with
> different environment variables? Are there more use cases (other than mine)
> that require an extension of this macro?
>
> Looking forwards to your opinions.
>
> Best regards,
> Florian
>
>
>
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