LaunchDarkly Sample App for C++

Requirements

• C++ 17+ compiler and dev tools

  • cmake 3.19+
  • boost 1.81+
  • openssl 1.1+
  • libpthread
  • drogon 1.9+

• LaunchDarkly Flags:

  • Release: UI Enhancements, key: release-ui-enhancements
  • Release: Home Page Slider, key: release-home-page-slider
  • Coffee Promo 1, key: coffee-promo-1
  • Coffee Promo 2, key: coffee-promo-2
  • Banner Text, key: banner-text

Setup

NOTE: These specific instructions are for Ubuntu 24 LTS.

Install libraries and dev tools

apt update
apt install -y build-essential cmake openssl libc6-dev libpthread-stubs0-dev libboost-all-dev libjsoncpp-dev uuid-dev zlib1g-dev libssl-dev

Install Drogon

git clone https://github.com/drogonframework/drogon
cd drogon
git submodule update --init
mkdir build
cd build
cmake ..
make && sudo make install
cd ../..

Close this repo and the SDK repo and build the app

git clone https://github.com/launchdarkly-labs/ld-sample-app-cpp
cd ld-sample-app-cpp
git clone https://github.com/launchdarkly/cpp-sdks.git
cd cpp-sdks
mkdir build && cd build
cmake ..
cmake --build .
cmake --install .
cd ../..
mkdir build && cd build
cmake ..
cmake --build .

Add LaunchDarkly keys

• While still in the build directory, rename .env.example to .env
• In the .env file, replace the fake keys with your LaunchDarkly SDK key and client-side key

Run

To run the site, from the build directory:

./ld-sample-app-cpp

In your browser, navigate to:

http://localhost:3000

Enjoy!