From c9d4261c9a6219b63cb0d604657ef64e8e9598b0 Mon Sep 17 00:00:00 2001
From: Tom Tan <totan@microsoft.com>
Date: Wed, 20 Dec 2023 14:52:21 -0800
Subject: [PATCH 1/2] Add DLL build CI pipeline with CXX20

---
 .github/workflows/ci.yml |  2 ++
 ci/do_ci.ps1             | 38 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 40 insertions(+)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 81a9397e2e..f3ae8edfd9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -732,6 +732,8 @@ jobs:
         ./ci/install_windows_protobuf.ps1
     - name: run cmake test (DLL build)
       run: ./ci/do_ci.ps1 cmake.dll.test
+    - name: run cmake cxx20 test (DLL build)
+      run: ./ci/do_ci.ps1 cmake.dll.cxx20.test
     - name: run otprotocol test (DLL build)
       run: ./ci/do_ci.ps1 cmake.exporter.otprotocol.dll.test
 
diff --git a/ci/do_ci.ps1 b/ci/do_ci.ps1
index a1e8c10014..bdab94ae04 100644
--- a/ci/do_ci.ps1
+++ b/ci/do_ci.ps1
@@ -90,6 +90,44 @@ switch ($action) {
       exit $exit
     }
   }
+  "cmake.dll.cxx20.test" {
+    cd "$BUILD_DIR"
+    cmake $SRC_DIR `
+      -DCMAKE_CXX_STANDARD=20 `
+      -DVCPKG_TARGET_TRIPLET=x64-windows `
+      -DOPENTELEMETRY_BUILD_DLL=1 `
+     "-DCMAKE_TOOLCHAIN_FILE=$VCPKG_DIR/scripts/buildsystems/vcpkg.cmake"
+    $exit = $LASTEXITCODE
+    if ($exit -ne 0) {
+      exit $exit
+    }
+    cmake --build . -j $nproc
+    $exit = $LASTEXITCODE
+    if ($exit -ne 0) {
+      exit $exit
+    }
+    ctest -C Debug
+    $exit = $LASTEXITCODE
+    if ($exit -ne 0) {
+      exit $exit
+    }
+    $env:PATH = "$BUILD_DIR\ext\src\dll\Debug;$env:PATH"
+    examples\simple\Debug\example_simple.exe
+    $exit = $LASTEXITCODE
+    if ($exit -ne 0) {
+      exit $exit
+    }
+    examples\metrics_simple\Debug\metrics_ostream_example.exe
+    $exit = $LASTEXITCODE
+    if ($exit -ne 0) {
+      exit $exit
+    }
+    examples\logs_simple\Debug\example_logs_simple.exe
+    $exit = $LASTEXITCODE
+    if ($exit -ne 0) {
+      exit $exit
+    }
+  }
   "cmake.maintainer.test" {
     cd "$BUILD_DIR"
     cmake $SRC_DIR `

From a2bce545409cc2e36844eb7a53ae548c225fa80b Mon Sep 17 00:00:00 2001
From: Tom Tan <totan@microsoft.com>
Date: Wed, 20 Dec 2023 16:25:52 -0800
Subject: [PATCH 2/2] Update changelog

---
 CHANGELOG.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 11ba426024..bcece1b331 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,8 @@ Increment the:
   [#2449](https://github.com/open-telemetry/opentelemetry-cpp/pull/2449)
 * [BUILD] Introduce CXX 20 CI pipeline for MSVC/Windows
   [#2450](https://github.com/open-telemetry/opentelemetry-cpp/pull/2450)
+* [BUILD] Add DLL build CI pipeline with CXX20
+  [#2465](https://github.com/open-telemetry/opentelemetry-cpp/pull/2465)
 
 Important changes: