# Document history for the Amazon SDK for C\$1\$1 Developer Guide
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This topic lists important changes to the Amazon SDK for C\$1\$1 Developer Guide. For notification about updates to this documentation, you can subscribe to an [RSS feed](https://docs.aws.amazon.com/sdk-for-cpp/latest/developer-guide/amazon-aws-sdk-for-cpp-dev-guide-doc-history.rss).

| Change | Description | Date | 
| --- |--- |--- |
| [Client configuration options](client-config.md) | Updated listing of client configuration variables. | September 8, 2025 | 
| [Updates to memory management and table of contents](#document-history) | Updated memory management parameters to latest. Standardized table of contents to be more consistent across Amazon SDKs. | March 14, 2025 | 
| [Amazon S3 Encryption Client V3 Migration](s3-encryption-migration-v2-v3.md) | Added information about migrating from V2 to V3 of the Amazon S3 encryption client. | December 2, 2024 | 
| [Custom libcrypto](#document-history) | Added content for custom libcrypto usage. Removed CMake maximum limitation. Updated available CMake parameters. | February 20, 2024 | 
| [Table of contents](#document-history) | Updated table of contents to make code examples more accessible. | June 1, 2023 | 
| [IAM best practices updates](#document-history) | Updated guide to align with the IAM best practices. For more information, see [Security best practices in IAM](https://docs.amazonaws.cn//IAM/latest/UserGuide/best-practices.html). | March 1, 2023 | 
| [Removing nuget](#document-history) | Removing mention of nuget as a viable package manager option because the latest version available is too old. | December 2, 2022 | 
| [Updates to Getting Started](#document-history) | Updated vcpkg content to clearly communicate that is not supported by Amazon and is an external option. Updated instructions on building the SDK for Windows with curl. | October 18, 2022 | 
| [Updates to `ClientConfiguration`](#document-history) | Updated the structure of the `ClientConfiguration` to accurately reflect latest API. | September 22, 2022 | 
| [Improvements to Getting Started](#document-history) | Improved clarity of getting started instructions for building the SDK on Windows and Linux. | June 24, 2022 | 
| [Windows curl Support](#document-history) |  Added notes about building the SDK for Windows with curl. | June 15, 2022 | 
| [Retiring EC2-Classic](#document-history) |  Added notes about retiring EC2-Classic. | April 13, 2022 | 
| [Enabling SDK Metrics](#document-history) | Removed information about enabling SDK metrics, which has been deprecated. | January 20, 2022 | 
| [Working with Amazon services](working-with-aws-services.md) | Included lists of the code examples that are available on GitHub in the Code Examples repository. | January 11, 2022 | 
| [Improvements](#document-history) | Improvements to Getting started section, Code examples section, and general standardization. | June 9, 2021 | 
| [Version update](#document-history) | Reflected the update to general release version of SDK to 1.9. | April 20, 2021 | 
| [Getting started using the Amazon SDK for C\$1\$1](getting-started.md) | Updated section with new organization and details. | March 17, 2021 | 
| [Amazon S3 Encryption Client Migration](s3-encryption-migration-v1-v2.md) | Added information about how to migrate your applications from V1 to V2 of the Amazon S3 encryption client. | August 7, 2020 | 
| [Security Content](security.md) | Added security content. | February 6, 2020 | 
| [Creating, listing, and deleting buckets](examples-s3-buckets.md) | Updated the Amazon S3 `CreateBucket` example to support Amazon Web Services Regions. | June 20, 2019 | 
| [Build instructions](#document-history) | Updated the SDK build instructions. | April 16, 2019 | 
| [Asynchronous methods](async-methods.md) | Added new section. | April 16, 2019 | 
| [Service Client Classes](using-service-client.md) | Various updates. | April 5, 2019 | 
| [Managing Amazon S3 Access Permissions](examples-s3-access-permissions.md) | Various updates. | April 3, 2019 | 
| [Updates for building and for configuration variables](#document-history) | Updated the instructions for building the SDK. Updated the available Amazon Client Configuration variables. | March 1, 2019 | 
| [*vcpkg* C\$1\$1 package manager](#document-history) | Updated the instructions for setting up the *vcpkg* C\$1\$1 package manager. | January 19, 2019 |