Hello everyone. I dont normally run to the forums for healp, but I have been dealing with an issue for two days and I am getting really frustrated. I am trying to interface with a LabJack from within a ROS node. The developers have published a .c file full of functions for native TCP operation. I have compiled it into a shared object library but I am unable to link to it (Upon linking, I get undefined reference errors on the lines where I call functions from the library).
I found a post on this site that says after adding the /lib directory (where my shared object library lives) to the link directories in CMakeLists, given my lib as libfoo, I add to the CMakeLists file
"target_link_libraries(myNode,foo)"
When I do this, I get the following error
CMake Error at CMakeLists.txt:36 (target_link_libraries):
Cannot specify link libraries for target "myNode" which is not
built by this project.
I am completely stumped. I am pasting my CMakeLists.txt. file just incase it helps. My node is for a diesel generator, called 'dieselGenerator' and my library (for the LabJack) is called libue9.so. It looks like comments get put in bold here, I dont mean to yell. I really appreciate your help.
Cheers
cmake_minimum_required (VERSION 2.4.6)
include ($ENV{ROS_ROOT}/core/rosbuild/rosbuild.cmake)
# Set the build type. Options are:
# Coverage : w/ debug symbols, w/o optimization, w/ code-coverage
# Debug : w/ debug symbols, w/o optimization
# Release : w/o debug symbols, w/ optimization
# RelWithDebInfo : w/ debug symbols, w/ optimization
# MinSizeRel : w/o debug symbols, w/ optimization, stripped binaries
#set (ROS_BUILD_TYPE RelWithDebInfo)
# Initialize the ROS build system.
rosbuild_init ()
# Set the default path for built executables to the "bin" directory.
set (EXECUTABLE_OUTPUT_PATH ${PROJECT_SOURCE_DIR}/bin)
#set the default path for built libraries to the "lib" directory
set(LIBRARY_OUTPUT_PATH ${PROJECT_SOURCE_DIR}/lib)
# Set the name to use for the executable.
set (BINNAME dieselGenerator)
# Set the source files to use with the executable.
#set (SRCS ${SRCS} src/ue9.c)
set (SRCS ${SRCS} src/dieselGenerator.cpp)
# Have ROS autogenerate code used in messages.
rosbuild_genmsg ()
# Set the directories where include files can be found.
include_directories (${PROJECT_SOURCE_DIR}/include)
# Make sure the compiler can find the libraries.
link_directories (${PROJECT_SOURCE_DIR}/lib)
target_link_libraries (dieselGenerator ue9)
# Build the executable that will be used to run this node.
rosbuild_add_executable (${BINNAME} ${SRCS})
# List the libraries here.
set (LIBS ${LIBS} ue9)