Hi,

The library you are trying to link to is named foo, not A in the CMakeLists.txt of A.  If you export -lfoo insteadof -lA it should work fine.  in our example code we often use ${PROJECT_NAME} for the name of libraries which makes the library have the same name as the package. 

As a side note, you don't need to explicitly link lib A, now foo, to bar in B's CMakeLists, it's already linked due to the export. 

Tully

On Tue, Feb 1, 2011 at 9:25 PM, Person With question <personwithquestion@yahoo.com> wrote:
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 ----
+ <export>
+   <cpp cflags="-I${prefix}/include" lflags="-Wl,-rpath,${prefix}/lib -L${prefix}/lib -lA"/>·
+ </export>
---- B ----
+ <depend package="A"/>

...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



_______________________________________________
ros-users mailing list
ros-users@code.ros.org
https://code.ros.org/mailman/listinfo/ros-users




--
Tully Foote
Systems Engineer
Willow Garage, Inc.
tfoote@willowgarage.com
(650) 475-2827