fatal error: Eigen/Core: No such file or directory

asked 2012-09-19 02:53:50 -0500

867 ●27 ●36 ●48

updated 2012-09-19 03:04:28 -0500

I use Ubuntu 12.04 and Fuerte and for some reason, I cannot include laser_geometry.h from my code. When I do so, laser_geometry.h includes <Eigen/Core>, which makes rosmake fail when compiling my package:

  In file included from /home/robot/nifti_systems/bleeding-edge/stacks/nifti_ui/foo/src/foo.cpp:5:0:
  /opt/ros/fuerte/stacks/laser_pipeline/laser_geometry/include/laser_geometry/laser_geometry.h:46:22: fatal error: Eigen/Core: No such file or directory
  compilation terminated.
  make[3]: *** [CMakeFiles/foo.dir/src/foo.o] Error 1

Package foo has these dependencies in its manifest:

<depend package="roscpp"/>
<depend package="laser_geometry"/>

And I also tried with this (which should be unnecessary since it is already in the manifest of package laser_geometry):

<rosdep name="eigen"/>

I called rosdep install before rosmake, and it says that all dependencies are installed. I tried removing ROS_NOBUILD from laser_geometry, and I can build that package without a problem.

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4

answered 2012-09-19 22:55:13 -0500

Benoit Larochelle

867 ●27 ●36 ●48

This is a different solution than the one from tlinder, although it is related.

The migration web page mentions that if your package exports headers that use Eigen, you must export the Eigen flag. This is currently not done by package laser_geometry. I tried it on my set-up, i.e. I changed

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

to

<export>
<cpp cflags="`pkg-config --cflags eigen3` -I${prefix}/include" 
     lflags="-Wl,-rpath,${prefix}/lib -L${prefix}/lib -llaser_geometry"/>
</export>

and it solved the problem. If I'm not mistaken, it was just forgotten in laser_geometry. I filed a ticket for it: https://code.ros.org/trac/ros-pkg/ticket/5566.

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answered 2012-09-19 22:11:07 -0500

tlinder

663 ●7 ●8 ●16 http://bohnenstroh.homeip.net/

updated 2012-09-19 22:11:48 -0500

Take a look in the migration web page here.

Eigen is in fuerte differently used then in prior versions:

Starting with Fuerte, the new pattern to find Eigen in a CMakeLists.txt file is:

find_package(Eigen REQUIRED)

include_directories(${EIGEN_INCLUDE_DIRS})

add_definitions(${EIGEN_DEFINITIONS})