docs(release): update changelog for the 2025-09 release (#15553)

Author: scotthart

CHANGELOG.md

@@ -4,7 +4,7 @@
 breaking changes in the upcoming 3.x release. This release is scheduled for
 2024-12 or 2025-01.
 
-## v2.42.0 - TBD
+## v2.42.0 - 2025-09
 
 ### New Libraries
 
@@ -14,6 +14,29 @@ the APIs in these libraries are stable, and are ready for production use.
 - [Cloud Security Compliance](/google/cloud/cloudsecuritycompliance/README.md)
 - [Config Delivery API](/google/cloud/configdelivery/README.md)
 
+### Updated Libraries
+
+- [Network Connectivity](/google/cloud/networkconnectivity/README.md) - added support for DataTransferService ([#15464](https://github.com/googleapis/google-cloud-cpp/pull/15464))
+
+
+### [Spanner](/google/cloud/spanner/README.md)
+
+- perf(spanner): Use arenas to speed up queries that fetch many rows ([#15441](https://github.com/googleapis/google-cloud-cpp/pull/15441))
+
+### [Storage](/google/cloud/storage/README.md)
+
+- feat(storage): Remove unnecessary code which was causing race condition ([#15551](https://github.com/googleapis/google-cloud-cpp/pull/15551))
+- feat(storage): Update the appendable object function to store the Object metadata ([#15422](https://github.com/googleapis/google-cloud-cpp/pull/15422))
+- feat(storage): Add generation in append_object_spec in resume operation ([#15395](https://github.com/googleapis/google-cloud-cpp/pull/15395))
+
+### [Common Libraries](/google/cloud/README.md)
+
+- perf: Change StreamingReadRpc::Read interface to take ResponseType ([#15319](https://github.com/googleapis/google-cloud-cpp/pull/15319))
+
+### [Google APIs interface definitions](https://github.com/googleapis/googleapis)
+
+- This release is based on definitions as of [2025-09-05T15:58:06-07:00](https://github.com/googleapis/googleapis/tree/46403a9acec0719c130b33eb38b2ee62a45f9f6c)
+
 ## v2.41.0 - 2025-08-14
 
 ### [Bigtable](/google/cloud/bigtable/README.md)

CMakeLists.txt

@@ -23,7 +23,7 @@ project(
     google-cloud-cpp
     VERSION 2.42.0
     LANGUAGES CXX)
-set(PROJECT_VERSION_PRE_RELEASE "rc")
+set(PROJECT_VERSION_PRE_RELEASE "")
 
 if (NOT "${PROJECT_VERSION_PRE_RELEASE}" STREQUAL "")
     set(PROJECT_VERSION "${PROJECT_VERSION}-${PROJECT_VERSION_PRE_RELEASE}")

MODULE.bazel

@@ -16,7 +16,7 @@
 
 module(
     name = "google_cloud_cpp",
-    version = "2.42.0-rc",  # Updated by CMake
+    version = "2.42.0",  # Updated by CMake
     compatibility_level = 2,  # Updated by CMake
 )
 

google/cloud/internal/version_info.h

@@ -21,6 +21,6 @@
 #define GOOGLE_CLOUD_CPP_VERSION_MINOR 42
 // NOLINTNEXTLINE(modernize-macro-to-enum)
 #define GOOGLE_CLOUD_CPP_VERSION_PATCH 0
-#define GOOGLE_CLOUD_CPP_VERSION_PRE_RELEASE "rc"
+#define GOOGLE_CLOUD_CPP_VERSION_PRE_RELEASE ""
 
 #endif  // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_INTERNAL_VERSION_INFO_H