Add "using instrumentation libraries" for cpp

content/en/docs/languages/cpp/library.md

@@ -0,0 +1,61 @@
+---
+title: Using instrumentation libraries
+linkTitle: Libraries
+weight: 40
+---
+
+{{% docs/languages/libraries-intro "C++" %}}
+
+
+## Using instrumentation libraries
+
+
+When you develop an app, you might use third-party libraries and frameworks to accelerate your work. If you then 
+instrument your app using OpenTelemetry, you might want to avoid spending additional time to manually add traces, 
+logs, and metrics to the third-party libraries and frameworks you use.
+
+Many libraries and frameworks already support OpenTelemetry or are supported through OpenTelemetry
+[instrumentation](https://opentelemetry.io/docs/concepts/instrumentation/libraries/),
+so that they can generate telemetry you can export to an observability backend.
+
+If you are instrumenting an app or service that use third-party libraries or frameworks, follow these instructions to 
+learn how to use natively instrumented libraries and instrumentation libraries for your dependencies.
+
+
+## Use natively instrumented libraries
+
+If a library comes with OpenTelemetry support by default, you can get traces, metrics, and logs emitted from that 
+library by adding and setting up the OpenTelemetry SDK with your app.
+
+The library might require some additional configuration for the instrumentation. See the documentation for that 
+library to learn more.
+
+
+If a library doesn't include OpenTelemetry support, you can use
+[instrumentation libraries](https://opentelemetry.io/docs/specs/otel/glossary/#instrumentation-library)
+to generate telemetry data for a library or framework.
+
+For example,
+[NGINX instrumentation](https://github.com/open-telemetry/opentelemetry-cpp-contrib/tree/main/instrumentation/nginx)
+adds OpenTelemetry distributed tracing support to NGINX.
+
+
+## Setup
+
+To set up an instrumentation library see [otel-cpp-contrib](https://github.com/open-telemetry/opentelemetry-cpp-contrib/tree/main/instrumentation)
+
+
+## Available packages
+
+A full list of instrumentation libraries available can be found in the [openTelemetry registry](https://opentelemetry.io/ecosystem/registry/?language=cpp&component=instrumentation)
+
+
+## Next steps
+
+After you've set up instrumentation libraries, you might want to add
+[additional instrumentation](https://opentelemetry.io/docs/languages/cpp/instrumentation/) to collect
+custom telemetry data.
+
+You might also want to configure an appropriate exporter to
+[export your telemetry data]( https://opentelemetry.io/docs/languages/cpp/exporters/) to one or more
+telemetry backends.