Support Windows ARM64 platform

.ci_support/win_arm64_freethreadingno.yaml

@@ -0,0 +1,43 @@
+build_type:
+- release
+bzip2:
+- '1'
+c_compiler:
+- vs2022
+c_stdlib:
+- vs
+channel_sources:
+- conda-forge/label/python_rc,conda-forge
+channel_targets:
+- conda-forge main
+cxx_compiler:
+- vs2022
+expat:
+- '2'
+freethreading:
+- 'no'
+libffi:
+- '3.5'
+liblzma_devel:
+- '5'
+libsqlite:
+- '3'
+openssl:
+- '3.5'
+pin_run_as_build:
+  python:
+    min_pin: x.x
+    max_pin: x.x
+python:
+- '3.14'
+target_platform:
+- win-arm64
+tk:
+- '8.6'
+zip_keys:
+- - build_type
+  - channel_targets
+zlib:
+- '1'
+zstd:
+- '1.5'

.ci_support/win_arm64_freethreadingyes.yaml

@@ -0,0 +1,43 @@
+build_type:
+- release
+bzip2:
+- '1'
+c_compiler:
+- vs2022
+c_stdlib:
+- vs
+channel_sources:
+- conda-forge/label/python_rc,conda-forge
+channel_targets:
+- conda-forge main
+cxx_compiler:
+- vs2022
+expat:
+- '2'
+freethreading:
+- 'yes'
+libffi:
+- '3.5'
+liblzma_devel:
+- '5'
+libsqlite:
+- '3'
+openssl:
+- '3.5'
+pin_run_as_build:
+  python:
+    min_pin: x.x
+    max_pin: x.x
+python:
+- '3.14'
+target_platform:
+- win-arm64
+tk:
+- '8.6'
+zip_keys:
+- - build_type
+  - channel_targets
+zlib:
+- '1'
+zstd:
+- '1.5'

conda-forge.yml

@@ -9,6 +9,7 @@ build_platform:
   linux_aarch64: linux_64
   linux_ppc64le: linux_64
   osx_arm64: osx_64
+  win_arm64: win_64
 conda_build:
   pkg_format: '2'
 conda_forge_output_validation: true

recipe/build_base.bat

@@ -2,15 +2,18 @@ setlocal EnableDelayedExpansion
 echo on
 
 :: Compile python, extensions and external libraries
-if "%ARCH%"=="64" (
+if "%target_platform%"=="win-64" (
    set PLATFORM=x64
-   set VC_PATH=x64
    set BUILD_PATH=amd64
-) else (
+)
+if "%target_platform%"=="win-32" (
    set PLATFORM=Win32
-   set VC_PATH=x86
    set BUILD_PATH=win32
 )
+if "%target_platform%"=="win-arm64" (
+   set PLATFORM=ARM64
+   set BUILD_PATH=arm64
+)
 
 for /F "tokens=1,2 delims=." %%i in ("%PKG_VERSION%") do (
   set "VERNODOTS=%%i%%j"