What is the correct way to add external library?

asked 2012-05-16 21:50:07 -0600

liborw

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updated 2014-04-20 14:09:20 -0600

ngrennan
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Hello,

recently a have problems using external library in ros nodes. I'm using GNU Scientific Library (GSL) in my ros node. So I have to find a way how to add gsl to build and link this node.

First, I found gsl package in ros packages, copied the files, add to ros path, and add depend to the my node manifest, but problem arise see this and this questions.

However, if I understand it correct, which is not necessarily the case, the only important thing of gsl package is that it exports this line in the manifest:

<cpp cflags="-I/usr/include/gsl" lflags="-lgsl -lgslcblas"/>

I can place this include a libraries directly into CMakeList.txt and get rid of gsl package completely see this, the question is if it this is a desired approach?

Finally, I decided to ask more general question as the title states: what is the correct way to include external library (for example gsl) in the ros package?

Thanks

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answered 2012-05-17 02:24:16 -0600

Lorenz

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gsl shouldn't be wrapped in a ros package. Instead, your node should use a rosdep dependency on it and the CMake code as in Martin's answer.

Unfortunately, libgsl is not yet in Fuerte's rosdep system. Have a look here for information on how to contribute new rosdep rules.

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404 file not found

Akali ( 2015-01-15 19:13:26 -0600 )edit

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@Akali, Swearing is not appropriate in our forums. I've edited for comment to remove it.

tfoote ( 2015-01-15 20:02:35 -0600 )edit

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answered 2012-05-16 22:42:45 -0600

Martin Peris
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I don't know if this would be the best approach, but what I do to include gsl is to add the following to my CMakeList.txt:

find_package( PkgConfig REQUIRED)
pkg_check_modules( gsl REQUIRED gsl )

add_executable( my_exec src/my_source.cpp )
target_link_libraries( my_exec ${gsl_LIBRARIES} )

Hope this helps.

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Yeah, it helps, however does not answer the question what is the correct approach, thanks anyway.

liborw ( 2012-05-16 23:00:34 -0600 )edit

This is the first step of the correct approach. The rest involves adding a rosdep to your manifest.xml, and then making sure the rosdep is defined, as explained by @Lorenz.

joq ( 2012-05-17 05:56:05 -0600 )edit

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What is the correct way to add external library?

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