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I am in the same situation, I want to compile my code (ROS Hydro with catkin, Ubuntu 12.04 64b) with a third-party code in 32b.

I tried putting the "set_target_properties" to 32b:

set_target_properties(rfid_driver_wrapper PROPERTIES COMPILE_FLAGS "-m32" LINK_FLAGS "-m32")

But I get this error:

/opt/ros/hydro/lib/libroscpp.so: could not read symbols: File in wrong format

Could anybody help me?

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