README.md

Code examples

Relation to the slides

We provide several code examples that are used to illustrate several aspects of C++ mentioned during the lecture.

The directories containing the source code are named to match the names of the slides in which they are referenced:

• 02-UpdateToCXX
• 03-SOLID
• 04-STL

Building the example code

We use CMake as our primary build system generator. You will also need a C++20 enabled compiler. The following GCC versions have been tested under Debian Linux:

• GCC v10.4
• GCC v11.3

Notes

• We have only tested building the sources in a Linux environment. When you are on Windows we recommend using WSL with a recent compiler. On macOS most examples will compile as well but you might have to install a recent GCC compiler version.

• One of the examples uses the NUMA library as well as its header files. When on a Debian-based distro you can install the development version of this library with the command: apt-get install libnuma-dev (you might need to execute with the sudo command).

Steps for building

In order to compile all provided source files open a terminal emulator of your choice and and execute the following steps:

1. Clone the Google Benchmark repository and store it in the directory code/External/google-benchmark (relative to the root directory of the repository). If you choose a different directory please make sure to update the line

   add_subdirectory( External/google-benchmark )

   in the CMakeLists.txt file. However, please make sure to place the repository a subdirectory of the code directory; otherwise CMake will complain.

2. Generate the build system:

   $ cmake -B cmake-build -G "Unix Makefiles" \
      -DCMAKE_BUILD_TYPE=Release \
      -DBENCHMARK_ENABLE_TESTING=OFF \
      -DBENCHMARK_DOWNLOAD_DEPENDENCIES=on \
      -DRUN_HAVE_GNU_POSIX_REGEX=0

3. Build the executables from the source code:

   $ cmake --build cmake-build

The cmake-build directory will mirror the directory structure of the source files. That is, the cmake-build/03-STL directory will contain binaries that have been built from the .cpp files contained in the 03-STL directory.