![]() ![]() openSUSE: sudo zypper install git gcc gcc-c++ gdb make cmake.Fedora: sudo dnf install git gcc g++ gdb make cmake.Debian/Ubuntu: sudo apt install git gcc g++ gdb make cmake.A template C application configured for building with CMake.įor installing the C/C++ development and Git related packages, you can follow these distribution specific installation instructions:.C/C++ development and Git related packages installed on your Linux system.To complete the steps in this article, you essentially need just two things: This article shows you how you can enable compiler warnings in your CMake CMakeLists.txt file. Perhaps even turns us into better developers. In my opinion always building your software applications and libraries with compiler warnings enabled, leads to higher quality software. These lenient default settings let us get away with a lot of things: Unused parameters, unused or uninitialized variables, to name just a few. Just keep in mind that CMake by default does not enable compiler warnings, when generating the build environment. ![]() When repeating these steps on a Windows PC, CMake automatically detects Visual Studio and generates a project solution for it. Running CMake for your project on your Linux machine, automatically detects GCC (or Clang) and generates a Makefile accordingly. This opens the path to cross-platform support for building your software. On top of that, it offers an abstraction layer from the compiler toolchain. It offers an easier to understand syntax, compared to Makefiles. BackgroundĬMake is quickly gaining popularity for generating the build environment for C and C++ applications and libraries. This article explains how you can enable compiler warnings, when using CMake to generate the build environment. Did you know that both GCC and Clang offer build-in functionality that aids us in becoming better developers and creating higher quality software? I’m talking about compiler warnings. If -DCMAKE_BUILD_TYPE=Debug is not passed, CMAKE_BUILD_TYPE is empty, and none of the extra CMAKE_CXX_FLAGS_XXX values are added, so we end with a build without -g.C and C++ compiler toolchains make it possible for us software geeks to build amazing things. Flags used by the CXX compiler during RELWITHDEBINFO builds.ĬMAKE_CXX_FLAGS_RELWITHDEBINFO:STRING=-O2 -g -DNDEBUG Flags used by the CXX compiler during RELEASE builds.ĬMAKE_CXX_FLAGS_RELEASE:STRING=-O3 -DNDEBUG Flags used by the CXX compiler during MINSIZEREL builds.ĬMAKE_CXX_FLAGS_MINSIZEREL:STRING=-Os -DNDEBUG Flags used by the CXX compiler during DEBUG builds. ![]() That command also shows other values of interest which clarify the default behavior across built types: // Flags used by the CXX compiler during all build types. Flags used by the C compiler during DEBUG builds. Which gives: // Flags used by the CXX compiler during DEBUG builds. The default values of CMAKE_C_FLAGS_DEBUG and CMAKE_CXX_FLAGS_DEBUG can be found as mentioned at: with: cmake -LAH. If you would really like to explicitly control the build flags for the debug you can also set them with cmake -DCMAKE_BUILD_TYPE=Debug ![]() O0 is not added by default to the Debug build, but -O0 is the default -O value as mentioned at: and on man gcc, so it normally doesn't matter. Which shows the GCC build commands as explained at: ĭoing that adds the -g flag as can be confirmed with: make VERBOSE=1 At invocation time, normally all that you need to make a debug build with CMake is: cmake -DCMAKE_BUILD_TYPE=Debug. ![]()
0 Comments
Leave a Reply. |