catkin_make not detecting .msg files in msg directory

asked 2016-02-10 00:56:31 -0500

Manny
1 ●1 ●1 ●3

updated 2016-02-10 01:18:11 -0500

I'm fairly new to ROS, so I don't fully comprehend what's going on. This wasn't an issue until I installed some new python libraries to my computer earlier today. Essentially, when I run catkin_make it doesn't make the msg files available as header files in the include directory in the devel directory. So when it tries to compile the .cpp files in the source directory it says "mobility/Resource.h" no such file or directory.

Now, when I move the .msg files up one directory to the same directory as mobility/ where CMakeLists.txt and package.xml are, then it does detect them. This is the current directory structure with the .msg files where they are supposed to be.

This wasn't an issue at all until today. It compiled perfectly before today.

Oh yes. So if I do rosmsg list | grep mobility all 3 msg files show up.

Doesn't compile with this:

mobility/
├── CMakeLists.txt
├── msg
│   ├── Pose2D.msg
│   ├── Resource.msg
│   └── Status.msg
├── package.xml
└── src
    └── mobility.cpp

Compiles with this:

src/mobility/
├── CMakeLists.txt
├── msg
│   ├── Pose2D.msg
│   ├── Resource.msg
│   └── Status.msg
├── package.xml
├── Pose2D.msg
├── Resource.msg
├── src
│   └── mobility.cpp
└── Status.msg

Current CMake file:

cmake_minimum_required(VERSION 2.8.3)
project(mobility)

find_package(catkin REQUIRED COMPONENTS
  geometry_msgs
  roscpp
  sensor_msgs
  std_msgs
  random_numbers
  message_generation
)

add_message_files(
    FILES
    Resource.msg
    Pose2D.msg
    Status.msg
    )

generate_messages(
    DEPENDENCIES
    std_msgs
    )

catkin_package(
  CATKIN_DEPENDS 
  geometry_msgs 
  roscpp 
  sensor_msgs 
  std_msgs 
  random_numbers
  message_runtime
)


add_executable(
  mobility src/mobility.cpp
)

target_link_libraries(
  mobility
  ${catkin_LIBRARIES}
)

package.xml:

<?xml version="1.0"?>
<package>
  <name>mobility</name>
  <version>0.2.0</version>
  <description>Algorithmic implementation of random search as a finite state machine</description>

  <maintainer email="swarmathon@cs.unm.edu">NASA Swarmathon</maintainer>

  <license>GPLv2</license>

  <buildtool_depend>catkin</buildtool_depend>
  <build_depend>geometry_msgs</build_depend>
  <build_depend>roscpp</build_depend>
  <build_depend>sensor_msgs</build_depend>
  <build_depend>std_msgs</build_depend>
  <build_depend>random_numbers</build_depend>
  <build_depend>message_generation</build_depend>

  <run_depend>geometry_msgs</run_depend>
  <run_depend>roscpp</run_depend>
  <run_depend>sensor_msgs</run_depend>
  <run_depend>std_msgs</run_depend>
  <run_depend>random_numbers</run_depend>
  <run_depend>message_runtime</run_depend>

</package>

first few lines of mobility.cpp:

#include <ros/ros.h>

//ROS libraries
#include <angles/angles.h>
#include <random_numbers/random_numbers.h>
#include <tf/transform_datatypes.h>

//ROS messages
#include <std_msgs/Int16.h>
#include <std_msgs/UInt8.h>
#include <std_msgs/String.h>
#include <sensor_msgs/Joy.h>
#include <sensor_msgs/Range.h>
#include <geometry_msgs/Pose2D.h>
#include <geometry_msgs/Twist.h>
#include <nav_msgs/Odometry.h>
#include "mobility/Resource.h"
#include "mobility/Pose2D.h"
#include "mobility/Status.h"
#include <map>
// To handle shutdown signals so the node quits properly in response to "rosnode kill"
#include <ros/ros.h>
#include <signal.h>

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2 Answers

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answered 2016-02-10 02:09:59 -0500

Manny
1 ●1 ●1 ●3

Okay so first I discovered I could run catkin_make like 4 times and then it will build all the proper header files in the include directory, but obviously that didn't solve the issue. So I searched for "catkin_make multiple times site:ros.org" and I found the solution.

cmake_minimum_required(VERSION 2.8.3)
project(mobility)

find_package(catkin REQUIRED COMPONENTS
  geometry_msgs
  roscpp
  sensor_msgs
  std_msgs
  random_numbers
  message_generation
)

add_message_files(
    FILES
    Resource.msg
    Pose2D.msg
    Status.msg
    )

generate_messages(
    DEPENDENCIES
    std_msgs
    )

catkin_package(
  CATKIN_DEPENDS geometry_msgs roscpp sensor_msgs std_msgs random_numbers
  message_runtime
)

add_executable(
  mobility src/mobility.cpp
)

add_dependencies(mobility ${catkin_EXPORTED_TARGETS})

target_link_libraries(
  mobility
  ${catkin_LIBRARIES}
)

I just needed to add

add_dependencies(mobility ${catkin_EXPORTED_TARGETS})

Where mobility is the executable(s)? for the package.

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answered 2016-02-10 02:07:39 -0500

Javier V. Gómez

1295 ●17 ●41 ●54 http://jvgomez.github.io/

You definitely should have your messages in the msg folder. I would say you are missing two things:

In catkin_package you should add EXPORTED_TARGETS mobility_generate_messages_cpp
Add this dependency to your executable: add_dependencies(mobility mobility_generate_messages_cpp)

This way, you are saying that mobility requires the messages generated and thus catkin would build them first. If you do not have these lines, it can compile if, for some reason, catkin decides to build first the messages instead of the executable. But if dependencies are not properly set then this is not guaranteed, and I would say this is what is happening to you.