[cpp] Update READMEs for C++ projects and examples

cpp/README.md

@@ -7,6 +7,7 @@ shaunrd0/klips/cpp/
 ├── cryptography   # Examples of encrypting / decrypting using ciphers in C++
 ├── datastructs    # Collection of useful datastructures written in C++
 ├── graphics       # Examples of graphics projects written in C++
+├── multithreading # Basic multithreading examples in C++
 ├── patterns       # Examples of various design patterns written in C++
 └── README.md
 ```

cpp/multithreading/CMakeLists.txt

@@ -15,6 +15,9 @@ project(
     LANGUAGES   CXX
 )
 
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
+add_compile_options("-Wall")
+
 add_subdirectory(conditions)
 add_subdirectory(deadlock)
 add_subdirectory(livelock)

cpp/multithreading/README.md

@@ -0,0 +1,25 @@
+# Multithreading
+
+A few basic multithreading programs written in C++ while learning about 
+the [concurrency support library](https://en.cppreference.com/w/cpp/thread)
+
+```
+klips/cpp/multithreading
+.
+├── conditions     # Using condition_variable to control job execution flow
+├── deadlock       # Example of problem and solution for deadlocks
+├── livelock       # Example of problem and solution for livelocks
+├── race-condition # Example of problem and solution for race conditions
+└── README.md
+```
+
+We can build the examples with the following commands.
+
+```bash
+cd /path/to/klips/cpp/multithreading/
+mkdir build && cd build
+cmake .. && cmake --build .
+ls bin/
+
+multithread-conditions  multithread-deadlock  multithread-livelock  multithread-race-condition
+```