CMAKE VS WAF SOFTWARE
Even if the computers are getting faster and faster, we are still doing some great piece of software that can be long to compile…. Please point out any mistakes you see, ask questions, and share your problems and discoveries you had with CMake.One of the most annoying things in software development is compile time.
CMAKE VS WAF SERIES
The next post in this series is Another Target and the Project. Come back to the list at the start of this post for a table of contents. I am still learning CMake myself, so the more advanced stuff will come in later posts as I learn it. I will add a few more posts about it in the next weeks. This is only the very first step in getting started with CMake. That means we can cleanly separate them from our project sources. Note that everything created by the build, including the Makefile, the executable, and other build artifacts, is located in our _build directory. In our example, that is the same as simply calling make, but it also works for other generators, e.g. This call to cmake directs it to the current directory, and the option -build tells it to use the generated files to do the actual build.
Building CXX object CMakeFiles/prog.dir/ Now that we have generated a Makefile, the last thing to do ist to actually build our program and run it: > cmake -build. Build files have been written to: C:/hello_cmake/_build The last lines of the output are about the project itself and will be repeated every time we call cmake: - Configuring done Without those variables, it simply looks for a number of known compilers in the PATH. If the compiler CMake finds is not the one we want, we can set the environment variables CC and CXX to point to the correct C and C++ compilers, respectively. The information CMake finds about the compiler is stored in CMakeCache.txt, one of the generated files, so it does not have to do the chores again every time we run it. Check for working CXX compiler: C:/msys64/mingw64/bin/c++.exe - works Check for working CXX compiler: C:/msys64/mingw64/bin/c++.exe Check for working C compiler: C:/msys64/mingw64/bin/cc.exe - works Check for working C compiler: C:/msys64/mingw64/bin/cc.exe The CXX compiler identification is GNU 7.2.0 The first time we run cmake in this directory it will take a few seconds, detecting the C and C++ compilers to use and some information about them: - The C compiler identification is GNU 7.2.0 The latter will be located in the _build directory where we called cmake, among other things. is the path to the CMakeLists.txt, and -G "Unix Makefiles" tells it to generate a Makefile (try cmake -help for more generators). We’ll start with a very small project: A typical hello world example.
CMAKE VS WAF WINDOWS
I use MSYS2/MINGW64 on Windows and let CMake generate Makefiles, but the principle is the same for other environments and generators. In this post, I’ll lay out the very first step to approach a CMake-based project. This post is the first of a series about CMake:
That means it can generate Makefiles, ninja-build files, or project files for Visual Studio or Xcode, to name just a few. One of the main reasons probably is that it is cross-platform: It does not build the project itself but operates a platform-specific system. Since I have mentioned CMake in a handful of past blog posts, it is time to give a short introduction for those that don’t know it yet.ĬMake is one of the most popular build systems for C++ out there. 1.1 Run CMake to generate the build files….
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