![]() ![]() This property specifies the C standard whose features are requested to build this target. You always want to compile with warnings.Ī warning flag starts with -W and then the name of the warning, for example -Wconversion which warns about implicit conversions. The C standard whose features are requested to build this target. The C++ compiler comes with a lot of useful warnings that warn you about potential errors and issues in your code. In general this default is a rather old C++ standard so you always want to specify a standard. If you do not pass a standard the compiler will default to some standard that depends on your compiler version. Default value for CSTANDARD target property if set when a target is created. at 15:03 Tsyvarev Well spotted The cmakelists.txt is now clearer: the flag -stdc++14 is now clearly visible in the verbose output. For example to use the C++17 standard we can pass -std=c++17. ![]() The C++ standard that the compiler will use to compile a file is controlled by the -std= flag which takes an argument. But for now, I’m utterly confused: If I set the compiler through command line instead of set command in my CMakeLists, my project doesn’t link anymore with the C++ runtime (undeifned reference to all of std’s symbols). Important Flags ¶ Changing the C++ standard ¶ Consider the following CMakeLists.txt file: cmakeminimumrequired (VERSION 3.22) project (demo CXX) set (CMAKECXXSTANDARD 14) set (CMAKECXXSTANDARDREQUIRED ON) set (CMAKECXXEXTENSIONS OFF) addexecutable (demo main.cpp) targetcompilefeatures (demo PUBLIC cxxstd14) And now the following main.cpp c++ code: include. Hi again, Having a build tree per compiler seems to be a good idea. ![]() This is in fact what CMake does under the hood and the reason why there was no a.out in the build directory when using CMake to build a project. And now the executable is called my_cool_executable. ![]()
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