It’s cleaner to have them put inside a dedicated build folder instead: o files and the cpp_demo executable) directly in the current working directory. In our first attempt, we generated all the binaries ( libchucknorris.a, the. I’ve already explain why I prefer using CMake with Ninja in an other blog post. There are plenty of generators available, but for now we’ll only talk about Ninja. Instead it generates files that will be used by an other tool.
CMAKE COMMANDS HOW TO
Now that we have described what we want to build and how, we still need to perform the build itself.ĬMake does not know how to actually perform the build. This will allow us to use modern C++ features (available in C++ 11 or later) such as the auto keyword or raw string literals later on. You can read more about this in the CMake documentation.Īlso note how we set the CMAKE_CXX_STANDARD variable. If the headers were used only to compile the library, we would have used the PRIVATE keyword, and if they were used only by consumers of the library, we would have used the INTERFACE keyword instead. (We used the -I include/ flag both for building libchucknorris.o and ) The target_include_directories informs CMake that there are header files in the include directories that should be used both when builing the library itself, but also by consumers of the library.
The add_library and add_executable commands describe the two targets (named chucknorris and cpp_demo) and the sources used to build them, and the target_link_libraries command tells CMake that cpp_demo depends on chucknorris. Make: Entering directory '/home/george/Projects/3rd Party/segments222bit/cmake-build-debug'Īdd the option -no-print-directory to your make command to disable them.Cmake_minimum_required( VERSION 3.10) set( CMAKE_CXX_STANDARD 11) project( ChuckNorris) add_library( chucknorris include/ChuckNorris.hpp src/ChuckNorris.cpp ) target_include_directories(Ĭhucknorris PUBLIC "include" ) add_executable( cpp_demo src/main.cpp ) target_link_libraries( cpp_demo chucknorris) make: Leaving directory '/home/george/Projects/3rd Party/segments222bit/cmake-build-debug' cmake -DCMAKE_RULE_MESSAGES:BOOL=OFF $path_to_project_source To remove the ‘Entering directory’ and ‘Leaving directory’ lines from the outputĮ.g. Linking C static library libsegments.aĪdd the option -DCMAKE_RULE_MESSAGES:BOOL=OFF to your cmake command to disable them.Į.g. Building C object libs/segmentation/CMakeFiles/segments.dir/list_helpers.c.o Bonus To remove the ‘building’ and ‘linking’ lines from the outputĮ.g. Please note, you cannot disable verbose output using make VERBOSE=0 after you enable it through cmake, you need to execute the cmake command again without the -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON option. So, assuming you are in the folder where you want to make the build, execute the following to generate the Makefiles: cmake -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON $path_to_project_source Īnd then just issue make to perform the build with verbose output. Option 3 – Add the variable -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON to your cmake commandĪdding the option -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON to the cmake command, it will enable verbosity on all generated Makefiles permanently. The caveat of this solution is that EVERYTHING becomes verbose, so you could have too many output data. Option 2 – Add the variable VERBOSE=1 to your make commandĪssuming you are using a terminal and you are in the folder where you want to build your project.Īfter you execute the command cmake $path_to_project_source Įxecute your make command using the VERBOSE=1 variable as follows make VERBOSE=1 Thus, you need to copy the configuration file to each CMakeLists.txt file you want to be verbose. This option by itself is enough to enable verbosity.Ī caveat with this option is that the configuration is not passed on to other CMakeLists.txt files that are included to the build using the command add_subdirectory () from the master CMakeLists.txt file. We sure did and this is how we did it: Option 1 – Change your CMakeLists.txt filesĪs our first option, we present updating your CMakeLists.txt file to include the following configuration line: set(CMAKE_VERBOSE_MAKEFILE ON) 20 March 2017 in Programming tagged cmake / make / verbose by TuxĮver wanted to get more information out of a build process controlled by CMake?
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