Linking with Gazebo using Catkin fails #856
Description
Some of the exported flags (?) are being done incorrectly with Gazebo when using Catkin. @j-rivero indicates the problem is not within Gazebo because "We have built a lot of third party software on top of Gazebo so it should be related to catkin packages somehow." Though, we've also built even more software with Catkin...
The original issue from bitbucket:
Based on discussions with @j-rivero on this gazebo_ros_pkgs pull request, I've isolated some sort of flag export build problem that results in the error:
CMake Error at /home/dave/ros/current/ws_gazebo_test/devel_release/share/base_pkg/cmake/base_pkgConfig.cmake:141 (message):
Project 'dummy_pkg' tried to find library '-lpthread'. The library is
neither a target nor built/installed properly. Did you compile project
'base_pkg'? Did you find_package() it before the subdirectory containing
its code is included?
Call Stack (most recent call first):
/opt/ros/kinetic/share/catkin/cmake/catkinConfig.cmake:76 (find_package)
CMakeLists.txt:6 (find_package)
I think the problem is Gazebo7 is exporting a dependency on pthread which is suggested is bad on StackOverflow.
This occurs when one catkin package depends on Gazebo, and another depends on that package:
base_pkg CMakeLists
cmake_minimum_required(VERSION 2.8.3)
project(base_pkg)
find_package(catkin REQUIRED COMPONENTS
roscpp
)
find_package(GAZEBO REQUIRED)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GAZEBO_CXX_FLAGS}")
find_package(Boost REQUIRED COMPONENTS thread)
include_directories(
${catkin_INCLUDE_DIRS}
)
catkin_package(
DEPENDS
Boost
GAZEBO
)
dependent pkg CMakeLists
cmake_minimum_required(VERSION 2.8.3)
project(dummy_pkg)
find_package(catkin REQUIRED COMPONENTS
base_pkg
)
include_directories(
${catkin_INCLUDE_DIRS}
)
catkin_package(
CATKIN_DEPENDS
base_pkg
)
The full workspace can be tested from this barebones test repo I've just created.