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Merged
marcalff merged 10 commits into from
Mar 20, 2026
Merged

[RELEASE] Release opentelemetry-cpp 1.26.0 #3944

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[RELEASE] Release opentelemetry-cpp 1.26.0
marcalff Mar 18, 2026
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Merge branch 'main' into release_1.26
marcalff Mar 18, 2026
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marcalff Mar 18, 2026
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Merge branch 'main' into release_1.26
marcalff Mar 19, 2026
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Merge branch 'main' into release_1.26
marcalff Mar 19, 2026
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Changelog after merge
marcalff Mar 19, 2026
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marcalff Mar 19, 2026
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marcalff Mar 19, 2026
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marcalff Mar 19, 2026
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Build date, not timestamp
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165 changes: 148 additions & 17 deletions CHANGELOG.md
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Expand Up @@ -15,75 +15,206 @@ Increment the:

## [Unreleased]

* [EXPORTER] Remove explicit timestamps from metric points exported by Prometheus
[#3895](https://github.com/open-telemetry/opentelemetry-cpp/pull/3895)
## [1.26 2026-03-19]

* [BUILD] Fix benchmark genrule capturing stderr into JSON output
[#3925](https://github.com/open-telemetry/opentelemetry-cpp/pull/3925)
* [RELEASE] Bump main branch to 1.26.0-dev
[#3853](https://github.com/open-telemetry/opentelemetry-cpp/pull/3853)

* [BUILD] Configure ryml to use exceptions
[#3852](https://github.com/open-telemetry/opentelemetry-cpp/pull/3852)

* [TEST] Add multi-threaded metrics benchmarks for shared vs per-thread counter
[#3865](https://github.com/open-telemetry/opentelemetry-cpp/pull/3865)
* Bump step-security/harden-runner from 2.14.1 to 2.14.2
[#3854](https://github.com/open-telemetry/opentelemetry-cpp/pull/3854)

* [CONFIGURATION] File configuration - handle invalid YAML
[#3858](https://github.com/open-telemetry/opentelemetry-cpp/pull/3858)

* Bump docker/build-push-action from 6.18.0 to 6.19.1
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@dbarker dbarker Mar 19, 2026

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Consider removing the github action notes. They seem more like an internal CI detail not that useful to users. They will show up in the commit diff for the release if anyone is interested.

[#3860](https://github.com/open-telemetry/opentelemetry-cpp/pull/3860)

* [BUILD] Avoid break caused by max() macro on windows
[#3863](https://github.com/open-telemetry/opentelemetry-cpp/pull/3863)

* Bump docker/build-push-action from 6.19.1 to 6.19.2
[#3864](https://github.com/open-telemetry/opentelemetry-cpp/pull/3864)

* Bump github/codeql-action from 4.32.2 to 4.32.3
[#3868](https://github.com/open-telemetry/opentelemetry-cpp/pull/3868)

* Bump actions/stale from 10.1.1 to 10.2.0
[#3871](https://github.com/open-telemetry/opentelemetry-cpp/pull/3871)

* [CI] Fix publish-to-bcr workflow
[#3869](https://github.com/open-telemetry/opentelemetry-cpp/pull/3869)

* [CONFIGURATION] Provide bazel updates with dependabot
[#3870](https://github.com/open-telemetry/opentelemetry-cpp/pull/3870)

* Bump prometheus-cpp from 1.3.0 to 1.3.0.bcr.2
[#3873](https://github.com/open-telemetry/opentelemetry-cpp/pull/3873)

* Bump bazel_skylib from 1.7.1 to 1.9.0
[#3874](https://github.com/open-telemetry/opentelemetry-cpp/pull/3874)

* Bump rules_cc from 0.2.9 to 0.2.17
[#3875](https://github.com/open-telemetry/opentelemetry-cpp/pull/3875)

* Bump zlib from 1.3.1.bcr.5 to 1.3.2
[#3880](https://github.com/open-telemetry/opentelemetry-cpp/pull/3880)

* Bump curl from 8.8.0 to 8.11.0.bcr.4
[#3879](https://github.com/open-telemetry/opentelemetry-cpp/pull/3879)

* [CI] Add Doxygen validation workflow
[#3882](https://github.com/open-telemetry/opentelemetry-cpp/pull/3882)

* [SEMANTIC CONVENTIONS] Upgrade to semantic conventions 1.40.0
[#3881](https://github.com/open-telemetry/opentelemetry-cpp/pull/3881)

* Bump github/codeql-action from 4.32.3 to 4.32.4
[#3884](https://github.com/open-telemetry/opentelemetry-cpp/pull/3884)

* [API] Environment Variables as Context Propagation Carriers
[#3834](https://github.com/open-telemetry/opentelemetry-cpp/pull/3834)

* [SDK] Trace StartSpan - do not call GetCurrentSpan() unless needed
[#3888](https://github.com/open-telemetry/opentelemetry-cpp/pull/3888)

* Bump step-security/harden-runner from 2.14.2 to 2.15.0
[#3889](https://github.com/open-telemetry/opentelemetry-cpp/pull/3889)

* Bump google_benchmark from 1.8.4 to 1.9.5
[#3885](https://github.com/open-telemetry/opentelemetry-cpp/pull/3885)

* Bump actions/download-artifact from 7.0.0 to 8.0.0
[#3892](https://github.com/open-telemetry/opentelemetry-cpp/pull/3892)

* [BUILD] Revisit EventLogger deprecation
[#3855](https://github.com/open-telemetry/opentelemetry-cpp/pull/3855)

* Bump platforms from 0.0.11 to 1.0.0
[#3893](https://github.com/open-telemetry/opentelemetry-cpp/pull/3893)

* Bump benchmark-action/github-action-benchmark from 1.20.7 to 1.21.0
[#3896](https://github.com/open-telemetry/opentelemetry-cpp/pull/3896)

* Bump github/codeql-action from 4.32.4 to 4.32.5
[#3897](https://github.com/open-telemetry/opentelemetry-cpp/pull/3897)

* [TEST] Add multi-threaded metrics benchmarks: shared vs per-thread counter
[#3898](https://github.com/open-telemetry/opentelemetry-cpp/pull/3898)

* [BUILD] Upgrade bazel dependencies
[#3891](https://github.com/open-telemetry/opentelemetry-cpp/pull/3891)

* [CODE HEALTH] Fix clang-tidy warnings, part 2
[#3872](https://github.com/open-telemetry/opentelemetry-cpp/pull/3872)

* [CONFIGURATION] File configuration - spec stability
[#3862](https://github.com/open-telemetry/opentelemetry-cpp/pull/3862)

* [CI] replace cfssl with openssl for certificate generation
[#3902](https://github.com/open-telemetry/opentelemetry-cpp/pull/3902)

* Bump abseil-cpp from 20240116.1 to 20260107.1
[#3877](https://github.com/open-telemetry/opentelemetry-cpp/pull/3877)

* Bump googletest from 1.14.0.bcr.1 to 1.17.0.bcr.2
[#3876](https://github.com/open-telemetry/opentelemetry-cpp/pull/3876)

* Bump curl from 8.11.0.bcr.4 to 8.12.0
[#3904](https://github.com/open-telemetry/opentelemetry-cpp/pull/3904)

* [BUILD] Upgrade to rapidyaml 0.10.0
[#3906](https://github.com/open-telemetry/opentelemetry-cpp/pull/3906)

* Bump github/codeql-action from 4.32.5 to 4.32.6
[#3910](https://github.com/open-telemetry/opentelemetry-cpp/pull/3910)

* Bump nlohmann_json from 3.12.0 to 3.12.0.bcr.1
[#3912](https://github.com/open-telemetry/opentelemetry-cpp/pull/3912)

* Bump docker/setup-qemu-action from 3.7.0 to 4.0.0
[#3903](https://github.com/open-telemetry/opentelemetry-cpp/pull/3903)

* Bump docker/setup-buildx-action from 3.12.0 to 4.0.0
[#3907](https://github.com/open-telemetry/opentelemetry-cpp/pull/3907)

* [EXAMPLES] Deprecated semantic conventions used
[#3905](https://github.com/open-telemetry/opentelemetry-cpp/pull/3905)

* Bump docker/build-push-action from 6.19.2 to 7.0.0
[#3909](https://github.com/open-telemetry/opentelemetry-cpp/pull/3909)

* [CODE HEALTH] Fix clang-tidy warnings: cppcoreguidelines-init-variables
[#3919](https://github.com/open-telemetry/opentelemetry-cpp/pull/3919)

* Bump step-security/harden-runner from 2.15.0 to 2.15.1
[#3908](https://github.com/open-telemetry/opentelemetry-cpp/pull/3908)

* [CODE HEALTH] Fix clang-tidy misc-use-internal-linkage warnings
[#3600](https://github.com/open-telemetry/opentelemetry-cpp/pull/3600)
[#3918](https://github.com/open-telemetry/opentelemetry-cpp/pull/3918)

* [CODE HEALTH] Fix clang-tidy macro to enum warnings
[#3922](https://github.com/open-telemetry/opentelemetry-cpp/pull/3922)

* [BUILD] Fix benchmark genrule capturing stderr into JSON output
[#3925](https://github.com/open-telemetry/opentelemetry-cpp/pull/3925)

* [CODE HEALTH] Fix clang-tidy performance enum size warnings
[#3923](https://github.com/open-telemetry/opentelemetry-cpp/pull/3923)

* [EXPORTER] Allow custom HttpClient in OTLP HTTP
[#3930](https://github.com/open-telemetry/opentelemetry-cpp/pull/3930)

* [CODE HEALTH] Fix clang-tidy unnecessary value param warnings
[#3931](https://github.com/open-telemetry/opentelemetry-cpp/pull/3931)

* [CODE HEALTH] Fix clang-tidy cppcoreguidelines-init-variables warnings
[#3919](https://github.com/open-telemetry/opentelemetry-cpp/pull/3919)
* Bump actions/download-artifact from 8.0.0 to 8.0.1
[#3928](https://github.com/open-telemetry/opentelemetry-cpp/pull/3928)

* [CODE HEALTH] Fix clang-tidy warnings in nostd files
[#3924](https://github.com/open-telemetry/opentelemetry-cpp/pull/3924)

* [EXPORTER] Allow custom HttpClient in OTLP HTTP
[#3930](https://github.com/open-telemetry/opentelemetry-cpp/pull/3930)

* [CODE HEALTH] Fix clang-tidy performance-for-range-copy warnings
[#3932](https://github.com/open-telemetry/opentelemetry-cpp/pull/3932)

* [CODE HEALTH] Fix clang-tidy performance-unnecessary-value-param warnings
[#3931](https://github.com/open-telemetry/opentelemetry-cpp/pull/3931)

* [CODE HEALTH] Fix clang-tidy bugprone warnings
[#3933](https://github.com/open-telemetry/opentelemetry-cpp/pull/3933)

* [CODE HEALTH] Fix clang-tidy special-member-functions warnings in trace
* [CODE HEALTH] Fix clang-tidy special-member-functions warnings in trace API
[#3934](https://github.com/open-telemetry/opentelemetry-cpp/pull/3934)

* [TEST] CMake component install test for resource_detectors
* Bump github/codeql-action from 4.32.6 to 4.33.0
[#3936](https://github.com/open-telemetry/opentelemetry-cpp/pull/3936)

* Bump step-security/harden-runner from 2.15.1 to 2.16.0
[#3937](https://github.com/open-telemetry/opentelemetry-cpp/pull/3937)

* [TEST] CMake component install test for `resource_detectors`
[#3940](https://github.com/open-telemetry/opentelemetry-cpp/pull/3940)

* [CODE HEALTH] Fix clang-tidy performance warnings
[#3941](https://github.com/open-telemetry/opentelemetry-cpp/pull/3941)

* [EXPORTERS] Remove prometheus timestamps
[#3895](https://github.com/open-telemetry/opentelemetry-cpp/pull/3895)

* [SDK] Swap Tracer/Meter/LoggerConfig disabled for enabled
[#3942](https://github.com/open-telemetry/opentelemetry-cpp/pull/3942)

* [CMAKE] Update third party dependencies for cmake builds
[#3943](https://github.com/open-telemetry/opentelemetry-cpp/pull/3943)

* Bump codecov/codecov-action from 5.5.2 to 5.5.3
[#3945](https://github.com/open-telemetry/opentelemetry-cpp/pull/3945)

* Bump actions/cache from 5.0.3 to 5.0.4
[#3946](https://github.com/open-telemetry/opentelemetry-cpp/pull/3946)

* [CONFIGURATION] File configuration - Tracer/Meter/Logger config
[#3920](https://github.com/open-telemetry/opentelemetry-cpp/pull/3920)

Important changes:

* [SDK] Swap Tracer/Meter/LoggerConfig disabled for enabled
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2 changes: 1 addition & 1 deletion CMakeLists.txt
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Expand Up @@ -10,7 +10,7 @@ if(CMAKE_VERSION VERSION_GREATER_EQUAL "3.20.0")
endif()

set(OPENTELEMETRY_VERSION_NUMBER "1.26.0")
set(OPENTELEMETRY_VERSION_SUFFIX "-dev")
set(OPENTELEMETRY_VERSION_SUFFIX "")
set(OPENTELEMETRY_VERSION
"${OPENTELEMETRY_VERSION_NUMBER}${OPENTELEMETRY_VERSION_SUFFIX}")

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2 changes: 1 addition & 1 deletion MODULE.bazel
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Expand Up @@ -3,7 +3,7 @@

module(
name = "opentelemetry-cpp",
version = "1.26.0-dev",
version = "1.26.0",
compatibility_level = 0,
repo_name = "io_opentelemetry_cpp",
)
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2 changes: 1 addition & 1 deletion api/include/opentelemetry/version.h
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Expand Up @@ -12,7 +12,7 @@
#endif

// NOLINTBEGIN(cppcoreguidelines-macro-to-enum)
#define OPENTELEMETRY_VERSION "1.26.0-dev"
#define OPENTELEMETRY_VERSION "1.26.0"
#define OPENTELEMETRY_VERSION_MAJOR 1
#define OPENTELEMETRY_VERSION_MINOR 26
#define OPENTELEMETRY_VERSION_PATCH 0
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2 changes: 1 addition & 1 deletion sdk/include/opentelemetry/sdk/version/version.h
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Expand Up @@ -3,7 +3,7 @@

#pragma once

#define OPENTELEMETRY_SDK_VERSION "1.26.0-dev"
#define OPENTELEMETRY_SDK_VERSION "1.26.0"

#include "opentelemetry/version.h"

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6 changes: 3 additions & 3 deletions sdk/src/version/version.cc
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Expand Up @@ -14,11 +14,11 @@ namespace version
const int major_version = 1;
const int minor_version = 26;
const int patch_version = 0;
const char *pre_release = "dev";
const char *pre_release = "";
const char *build_metadata = "none";
const char *short_version = "1.26.0";
const char *full_version = "1.26.0-dev";
const char *build_date = "MAIN BRANCH";
const char *full_version = "1.26.0";
const char *build_date = "Thu Mar 19 04:25:52 PM UTC 2026";
} // namespace version
} // namespace sdk
OPENTELEMETRY_END_NAMESPACE
2 changes: 1 addition & 1 deletion tbump.toml
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Expand Up @@ -21,7 +21,7 @@
github_url = "https://github.com/open-telemetry/opentelemetry-cpp"

[version]
current = "1.26.0-dev"
current = "1.26.0"

# Example of a semver regexp.
# Make sure this matches current_version before
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