Apache Geode Native C++ CHANGELOG

C++ Application Development Walkthrough

Prerequisites
Setting up Directories and Sources
Configuring CMake
Building the App

This section describes how to set up a native client development environment using C++ and CMake.

Prerequisites

This walkthrough assumes that certain components are in place:

The Geode Native Client libraries. Install the Native Client as described in Getting Started with the Native Library. Follow the ease-of-use recommendations by installing the Native Client in a well-known location and renaming it.

System	Native Client Library Well-Known Location
Linux	/usr/local/nativeclient
Windows	C:\Program Files\nativeclient

The CMake tool suite. Download and install CMake, following the instructions on cmake.org.
Geode: Install and configure Geode. See the Geode User’s Guide for instructions and system requirements.

To develop a Native Client application using C++ and CMake:

Create a project directory structure
Populate the project directories with C++ source code
Configure the CMake build environment
Run CMake to build your application
Run your application

Setting up Directories and Sources

Create a project directory structure. In this example, the project is called MyProject. The directory structure provides a place for your application source files and a cmake modules directory for project-specific CMake files:
```
MyProject/
  cmake/
    FindGeodeNative.cmake
  CMakeLists.txt
  main.cpp
```
Change directory to MyProject and create your application sources. In this example, we have one source file, main.cpp.

Configuring CMake

Copy the FindGeodeNative.cmake script from one of the Native Client examples to the cmake subdirectory.
Create CMakeLists.txt. Copy the file from an example, if you like, as a starting point. The CMakeLists.txt file should contain the following CMake instructions:

CMake minimum version
```
cmake_minimum_required(VERSION 3.10)
```
Your project name and language
```
project(MyProject LANGUAGES CXX)
```
Minimum language version. For the Native Client, the minimum C++ version is 11.
```
set(CMAKE_CXX_STANDARD 11)
```
Path to the CMake modules directory where the FindGeodeNative.cmake script is located and an instruction telling CMake to use it:
```
set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)
find_package(GeodeNative REQUIRED COMPONENTS cpp)
```

The compilation target and the source(s) to be compiled

add_executable(MyProject main.cpp)

target_link_libraries(MyProject
  PUBLIC
    GeodeNative::cpp)

Combined, the above elements comprise the following CMakeLists.txt:

# CMakeLists.txt for C++ Native Client App
cmake_minimum_required(VERSION 3.10)

project(MyProject LANGUAGES CXX)

set(CMAKE_CXX_STANDARD 11)

set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)

find_package(GeodeNative REQUIRED COMPONENTS cpp)

add_executable(MyProject main.cpp)

target_link_libraries(MyProject
  PUBLIC
    GeodeNative::cpp)

Building the App

Create a build directory and set it as your current directory:
```
$ mkdir build
$ cd build
```
Run CMake twice, once to configure the build, then again to perform the build, generating the executable application.
```
$ cmake ..
$ cmake --build .
```

This creates the executable application in your build directory.