Linking object files in another package

asked 2011-10-25 19:43:33 -0500

raahlb
317 ●6 ●13 ●21

updated 2011-10-25 19:44:31 -0500

Hi,

Is there some way to directly link object files (.o) from another package, or is the only possible way to do it to change the build configuration of the second package so it creates a library file?

answered 2011-10-25 20:02:50 -0500

Lorenz

22731 ●129 ●202 ●316 http://ias.in.tum.de/p...

Normally, I would say you should create a library. Just use the CMake macro

rosbuild_add_library(foo src/foo.cpp src/bar.cpp)

In this example, a library named libfoo.so is created from files foo.cpp and bar.cpp.

To use your library from other packages, you also need to update your manifest file. In our example, you need to add this:

<export>
  <cpp cflags="-I${prefix}/include" lflags="-Wl,-rpath,${prefix}/lib -L${prefix}/lib -lfoo"/>
</export>

To use your library in another package you can now just depend on your package.

edit flag offensive delete link

Comments

Yes, I've done that. I was just wondering if there was some easier way to do it. Not that it it is that complex, but still, I was hoping to just link towards the .o files. As far as you know, there is no way to do that?

raahlb ( 2011-10-25 20:31:38 -0500 )edit

There might be a pretty hacky way by using the rosbuild cmake macros to find the path to a package and some cmake magic to find all object files in that package. But I wouldn't feel good with that solution :)

Lorenz ( 2011-10-25 20:34:44 -0500 )edit

In every meaningful way, the "build a library and export it" technique is the Right Answer.