CI Windows: Use CUDA >= 12.4 for python builds, and add an extra 12.0 job without python building

Author: ptheywood

.github/workflows/Draft-Release.yml

@@ -28,7 +28,7 @@ defaults:
 # + Wheel producing manylinux builds
 #   + CUDA 12.0 and 13.0, py 3.8-3.12, vis on/off, py only.
 # + Wheel producing Windows builds
-#   + CUDA 12.0 and 13.0, py 3.8-3.12, vis on/off, py only.
+#   + CUDA 12.4 and 13.0, py 3.8-3.12, vis on/off, py only.
 # + Draft github release workflow.
 
 jobs:
@@ -194,12 +194,12 @@ jobs:
             cuda_arch: "75"
             hostcxx: "Visual Studio 17 2022"
             os: windows-2025
-          # Newest and oldest CUDA 12.x we support. 12.4 is the oldest officially supported by MSVC >= 1940, but we have a workaround in place
+          # Newest and oldest CUDA 12.x we support. 12.4 is the oldest officially supported by MSVC >= 1940, and although we have a workaround in place 12.4+ is required for pyflamegpu in c++20.
           - cuda: "12.9.1"
             cuda_arch: "50"
             hostcxx: "Visual Studio 17 2022"
             os: windows-2025
-          - cuda: "12.0.0"
+          - cuda: "12.4.0"
             cuda_arch: "50"
             hostcxx: "Visual Studio 17 2022"
             os: windows-2022
@@ -494,8 +494,8 @@ jobs:
             cuda_arch: "75-real;80-real;90-real;100-real;110-real;120-real;120-virtual"
             hostcxx: "Visual Studio 17 2022"
             os: windows-2025
-          # Oldest CUDA 12.x we support. 12.4 is the oldest officially supported by MSVC >= 1940, but we have a workaround in place
-          - cuda: "12.0.0"
+          # Oldest CUDA 12.x we support. 12.4 is the oldest officially supported by MSVC >= 1940, and is required for pyflamegpu as c++20 due to compiler/stdlib errors
+          - cuda: "12.4.0"
             cuda_arch: "50-real;60-real;70-real;80-real;90-real;90-virtual"
             hostcxx: "Visual Studio 17 2022"
             os: windows-2022

.github/workflows/Windows-Tests.yml

@@ -28,11 +28,16 @@ jobs:
             cuda_arch: "75"
             hostcxx: "Visual Studio 17 2022"
             os: windows-2025
-          # Newest and oldest CUDA 12.x we support. 12.4 is the oldest officially supported by MSVC >= 1940, but we have a workaround in place
+          # Newest and oldest CUDA 12.x we support. 12.4 is the oldest officially supported by MSVC >= 1940, and although we have a workaround in place 12.4+ is required for pyflamegpu in c++20.
           - cuda: "12.9.1"
             cuda_arch: "50"
             hostcxx: "Visual Studio 17 2022"
             os: windows-2025
+          - cuda: "12.4.0"
+            cuda_arch: "50"
+            hostcxx: "Visual Studio 17 2022"
+            os: windows-2022
+          # No python in this workflow, so can just include 12.0 in the matrix.
           - cuda: "12.0.0"
             cuda_arch: "50"
             hostcxx: "Visual Studio 17 2022"

.github/workflows/Windows.yml

@@ -34,12 +34,12 @@ jobs:
             cuda_arch: "75"
             hostcxx: "Visual Studio 17 2022"
             os: windows-2025
-          # Newest and oldest CUDA 12.x we support. 12.4 is the oldest officially supported by MSVC >= 1940, but we have a workaround in place
+          # Newest and oldest CUDA 12.x we support. 12.4 is the oldest officially supported by MSVC >= 1940, and although we have a workaround in place 12.4+ is required for pyflamegpu in c++20.
           - cuda: "12.9.1"
             cuda_arch: "50"
             hostcxx: "Visual Studio 17 2022"
             os: windows-2025
-          - cuda: "12.0.0"
+          - cuda: "12.4.0"
             cuda_arch: "50"
             hostcxx: "Visual Studio 17 2022"
             os: windows-2022
@@ -73,7 +73,19 @@ jobs:
           - config:
               name: "Beltsoff"
             VISUALISATION: "ON"
-
+        include:
+          # Add an explicit CUDA 12.0 build for windows without Python
+          - cudacxx:
+              cuda: "12.0.0"
+              cuda_arch: "50"
+              hostcxx: "Visual Studio 17 2022"
+              os: windows-2022
+            python: ""
+            config:
+              - name: "Release"
+                config: "Release"
+                SEATBELTS: "ON"
+            VISUALISATION: "ON"
     # Name the job based on matrix/env options
     name: "build (${{ matrix.cudacxx.cuda }}, ${{matrix.python}}, ${{ matrix.VISUALISATION }}, ${{ matrix.config.name }}, ${{ matrix.cudacxx.os }})"