From e929ed7aeff966664f4584400c4372b964653c9e Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 30 Jun 2026 08:04:22 +0000
Subject: [PATCH 1/3] Set explicit Boost env vars on Windows CI

---
 .github/workflows/ci-windows.yml | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/.github/workflows/ci-windows.yml b/.github/workflows/ci-windows.yml
index 18c38b4..74d7439 100644
--- a/.github/workflows/ci-windows.yml
+++ b/.github/workflows/ci-windows.yml
@@ -127,6 +127,28 @@ jobs:
         cd ..
         #rm -rv boost*
 
+    - name: configure boost environment for meson
+      shell: pwsh
+      run: |
+        $boostRoot = 'C:\Boost'
+        if (-not (Test-Path $boostRoot)) {
+          throw "Boost root directory '$boostRoot' does not exist."
+        }
+
+        $boostIncludeDir = Get-ChildItem -Path (Join-Path $boostRoot 'include') -Directory -Filter 'boost-*' | Select-Object -First 1
+        if ($null -eq $boostIncludeDir) {
+          throw "No versioned Boost include directory found in '$boostRoot\\include'."
+        }
+
+        $boostLibraryDir = Join-Path $boostRoot 'lib'
+        if (-not (Test-Path $boostLibraryDir)) {
+          throw "Boost library directory '$boostLibraryDir' does not exist."
+        }
+
+        "BOOST_ROOT=$boostRoot" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+        "BOOST_INCLUDEDIR=$($boostIncludeDir.FullName)" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+        "BOOST_LIBRARYDIR=$boostLibraryDir" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+
     - name: install dependencies (meson & python)
       run: pip install meson meson-python pytest numpy 
       #run: pip install meson meson-python pytest numpy ninja

From 2ca3d8f4aa2a3a54c38beea9f7206111d5f732c1 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 30 Jun 2026 09:12:52 +0000
Subject: [PATCH 2/3] Ensure Boost headers are cached on windows cache miss

---
 .github/workflows/ci-windows.yml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.github/workflows/ci-windows.yml b/.github/workflows/ci-windows.yml
index 74d7439..eca522b 100644
--- a/.github/workflows/ci-windows.yml
+++ b/.github/workflows/ci-windows.yml
@@ -124,6 +124,8 @@ jobs:
         cd .\boost_${{matrix.boost-version_}}\
         .\bootstrap.bat ${{matrix.toolset}}
         .\b2.exe install --variant=release --threading=multi --link=static ${{matrix.boost-modules}}
+        New-Item -ItemType Directory -Path C:\Boost\include\boost_${{matrix.boost-version_}} -Force | Out-Null
+        Copy-Item -Path .\boost -Destination C:\Boost\include\boost_${{matrix.boost-version_}}\boost -Recurse -Force
         cd ..
         #rm -rv boost*
 

From 68c6515a18c82d246900d11fbe5aeaed9b69f72d Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 30 Jun 2026 09:13:46 +0000
Subject: [PATCH 3/3] Copy Boost headers into cached include directory

---
 .github/workflows/ci-windows.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/ci-windows.yml b/.github/workflows/ci-windows.yml
index eca522b..203eb75 100644
--- a/.github/workflows/ci-windows.yml
+++ b/.github/workflows/ci-windows.yml
@@ -125,7 +125,7 @@ jobs:
         .\bootstrap.bat ${{matrix.toolset}}
         .\b2.exe install --variant=release --threading=multi --link=static ${{matrix.boost-modules}}
         New-Item -ItemType Directory -Path C:\Boost\include\boost_${{matrix.boost-version_}} -Force | Out-Null
-        Copy-Item -Path .\boost -Destination C:\Boost\include\boost_${{matrix.boost-version_}}\boost -Recurse -Force
+        Copy-Item -Path .\boost -Destination C:\Boost\include\boost_${{matrix.boost-version_}} -Recurse -Force
         cd ..
         #rm -rv boost*