#Beginner cmake tutorial install#
#Beginner cmake tutorial series#

# This is a single line comment Targets The different types of targetsĪ target usually is an executable or a library, but can also be a custom target if your project needs to run some custom tools. 0 LANGUAGES C CXX) CommentsĬomments start with the character # and can be multiline ( bracket comments) if following the bracket_open syntax. This can be done easily with the project command: project(YOUR_PROJECT_NAME VERSION 0.1. Then, you'll want to specify the name, languages and version (needed for packaging purposes). Please do not use something older than 3.1, which dates back to 2014! cmake_minimum_required(VERSION 3.14) Project description In our case we choose CMake 3.14 as it is not too old and supports most recent features. This is important because CMake can have different behaviours based on its versions, which are named policies.ĭepending on the features you will be using, you might need to ask for more recent versions of CMake. The first thing you will need in it, is to specify the minimum version of CMake you will be using. CMake uses a file named CMakeLists.txt, and it is written in its own scripting language. The CMakeLists.txt fileĪll build systems require some kind of entrypoint for the definition of the project.

#Beginner cmake tutorial series#

This is the first article of a mini series related to build systems and continuous integration. We hope to answer this question so that the C++ community can thrive, and make it easier for everyone to integrate any library in a project. So while CMake is far from perfect, for now, it does the job.īut how does one write a good CMake project?

#Beginner cmake tutorial install#

It also requires no additional dependency such as Python which usually makes it a tiny bit easier to install for Continuous Integration on platforms such as Windows. We based this choice on the fact that most of the ecosystem is using CMake, so IDEs now have decent support for it, so do most libraries and major package managers. There are many (relatively) new (meta) buildsystems around lately such as build2 or meson. We cannot guess what 'the ROS tutorials' means (yes, we could assume it means the ones on the main ROS wiki, but when diagnosing problems, assuming things is bad).Cmake,tutorial,C++,buildsystem Why CMake?Īt siliceum, we decided to use CMake for our C++ based projects. Please: always link to whatever you are reading/following. I have been working through the ROS tutorials and about midway through ROS tutorial 10 Originally posted by abraxasu on ROS Answers with karma: 16 on Ĭould you please show your complete CMakeLists.txt? The section you show is not something I would have expected to appear in a standard, regular, package-level build script for a ROS package. This is the offending section of CMakelists.txt: # search for catkin in all workspaces ROS env: ROS_ETC_DIR=/opt/ros/melodic/etc/ros I have tried to run cmake clean, but after deleting my catkin directory it produces an error that it cannot recognise catkin in my buildpath any longer. Despite trying to start from scratch many times it continues to be unable to run Cmake. However, it continues to try and build from the old CMakelists.txt file. I believe the second error only arose later because in trying to solve the problem I deleted my entire catkin directory and tried to start again from scratch. See also '/home/benjamin/catkin_ws/build/CMakeFiles/CMakeOutput.log'. Configuring incomplete, errors occurred!

One reason may be that no ROS setup.sh was catkin was neither found in the workspace nor I have been working through the ROS tutorials and about midway through ROS tutorial 10 where I changed the CMakelists.txt file to the new msg and srv output and went to build catkin again, it now produces the following error: CMake Error at CMakeLists.txt:56 (find_package):įind_package called with invalid argument 'roscpp'ĬMake Error at CMakeLists.txt:66 (message):įind_package(catkin) failed.