Hello, I am having trouble figuring out how to include libraries from other packages I have written. I have attached a minimal example of my problem. I have package A that contains foo.cpp and foo.h, and I have package B that contains bar.cpp from which it tries to call a function in foo.cpp. I have placed foo.h in "include/A/foo.h", and all cpp files are in their respective "src" folders. I have configured the manifests of package A and B as follows: ---- A ---- + + · + ---- B ---- + ...and I have configured the CMakeLists.txt of packages A and B as follows: ---- A ---- + rosbuild_add_library(foo src/foo.cpp) ---- B ---- + rosbuild_add_executable(bar src/bar.cpp) + target_link_libraries(bar A) It seems that I have no trouble including "A/foo.h" from bar.cpp, but I cannot use any of the functions. When I try to compile package B, I get the error "/usr/bin/ld: cannot find -lA" What am I doing wrong? I would very much appreciate it if someone could point me in the right direction, or email a new attachment with the fixed source. I've followed the advice in the following links, but have had no luck getting this example to work. http://ros-users.122217.n3.nabble.com/linking-shared-library-td862667.html http://www.ros.org/wiki/Manifest http://www.ros.org/wiki/rosbuild/CMakeLists -Person