[Python-checkins] bpo-33125: Add support for building and releasing Windows ARM64 packages (GH-16828)

Steve Dower webhook-mailer at python.org
Wed Nov 20 12:30:53 EST 2019


https://github.com/python/cpython/commit/de148f263fba75cd10d2cb010fe9c495cee4ec83
commit: de148f263fba75cd10d2cb010fe9c495cee4ec83
branch: master
author: Steve Dower <steve.dower at python.org>
committer: GitHub <noreply at github.com>
date: 2019-11-20T09:30:47-08:00
summary:

bpo-33125: Add support for building and releasing Windows ARM64 packages (GH-16828)

Note that the support is not actually enabled yet, and so we won't be publishing these packages. However, for those who want to build it themselves (even by reusing the Azure Pipelines definition), it's now relatively easy to enable.

files:
A Misc/NEWS.d/next/Windows/2019-11-14-08-57-50.bpo-33125.EN5MWS.rst
M .azure-pipelines/ci.yml
M .azure-pipelines/pr.yml
M .azure-pipelines/windows-release/build-steps.yml
M .azure-pipelines/windows-release/layout-command.yml
M .azure-pipelines/windows-release/msi-steps.yml
M .azure-pipelines/windows-release/stage-build.yml
M .azure-pipelines/windows-release/stage-layout-embed.yml
M .azure-pipelines/windows-release/stage-layout-full.yml
M .azure-pipelines/windows-release/stage-layout-msix.yml
M .azure-pipelines/windows-release/stage-layout-nuget.yml
M .azure-pipelines/windows-release/stage-pack-msix.yml
M .azure-pipelines/windows-release/stage-pack-nuget.yml
M .azure-pipelines/windows-release/stage-publish-nugetorg.yml
M .azure-pipelines/windows-release/stage-publish-pythonorg.yml
M .azure-pipelines/windows-release/stage-sign.yml
M .azure-pipelines/windows-steps.yml
M PC/layout/main.py
M PC/layout/support/appxmanifest.py
M PC/layout/support/constants.py
M PC/layout/support/nuspec.py
M PC/layout/support/props.py
M PCbuild/build.bat
M PCbuild/find_msbuild.bat
M PCbuild/get_externals.bat
M PCbuild/pcbuild.proj
M PCbuild/prepare_libffi.bat
M PCbuild/python_uwp.vcxproj
M PCbuild/pythonw_uwp.vcxproj

diff --git a/.azure-pipelines/ci.yml b/.azure-pipelines/ci.yml
index fe10e45b67922..4c2f115cd9b60 100644
--- a/.azure-pipelines/ci.yml
+++ b/.azure-pipelines/ci.yml
@@ -145,7 +145,7 @@ jobs:
         buildOpt: '-p x64'
         testRunTitle: '$(Build.SourceBranchName)-win64'
         testRunPlatform: win64
-    maxParallel: 2
+    maxParallel: 4
 
   steps:
   - template: ./windows-steps.yml
diff --git a/.azure-pipelines/pr.yml b/.azure-pipelines/pr.yml
index 09209fc0c954d..73d4f55b86450 100644
--- a/.azure-pipelines/pr.yml
+++ b/.azure-pipelines/pr.yml
@@ -145,7 +145,10 @@ jobs:
         buildOpt: '-p x64'
         testRunTitle: '$(System.PullRequest.TargetBranch)-win64'
         testRunPlatform: win64
-    maxParallel: 2
+      winarm64:
+        arch: arm64
+        buildOpt: '-p arm64'
+    maxParallel: 4
 
   steps:
   - template: ./windows-steps.yml
diff --git a/.azure-pipelines/windows-release/build-steps.yml b/.azure-pipelines/windows-release/build-steps.yml
index d4563cd0d722c..e2b6683f46e3c 100644
--- a/.azure-pipelines/windows-release/build-steps.yml
+++ b/.azure-pipelines/windows-release/build-steps.yml
@@ -43,7 +43,7 @@ steps:
 
 - powershell: |
     $env:SigningCertificate = $null
-    .\python.bat PC\layout -vv -t "$(Build.BinariesDirectory)\catalog" --catalog "${env:CAT}.cdf" --preset-default
+    python PC\layout -vv -b "$(Build.BinariesDirectory)\bin" -t "$(Build.BinariesDirectory)\catalog" --catalog "${env:CAT}.cdf" --preset-default --arch $(Arch)
     makecat "${env:CAT}.cdf"
     del "${env:CAT}.cdf"
     if (-not (Test-Path "${env:CAT}.cat")) {
@@ -52,6 +52,7 @@ steps:
   displayName: 'Generate catalog'
   env:
     CAT: $(Build.BinariesDirectory)\bin\$(Arch)\python
+    PYTHON_HEXVERSION: $(VersionHex)
 
 - task: PublishPipelineArtifact at 0
   displayName: 'Publish binaries'
diff --git a/.azure-pipelines/windows-release/layout-command.yml b/.azure-pipelines/windows-release/layout-command.yml
index 2dcd6ed26ca3a..406ccd859faa6 100644
--- a/.azure-pipelines/windows-release/layout-command.yml
+++ b/.azure-pipelines/windows-release/layout-command.yml
@@ -1,12 +1,20 @@
 steps:
+- task: DownloadPipelineArtifact at 1
+  displayName: 'Download artifact: bin_$(HostArch)'
+  condition: and(succeeded(), variables['HostArch'])
+  inputs:
+    artifactName: bin_$(HostArch)
+    targetPath: $(Build.BinariesDirectory)\bin_$(HostArch)
+
 - powershell: >
     Write-Host (
     '##vso[task.setvariable variable=LayoutCmd]&
-    "{0}\bin\python.exe"
+    "$(Python)"
     "{1}\PC\layout"
     -vv
     --source "{1}"
     --build "{0}\bin"
+    --arch "$(Name)"
     --temp "{0}\layout-temp"
     --include-cat "{0}\bin\python.cat"
     --doc-build "{0}\doc"'
diff --git a/.azure-pipelines/windows-release/msi-steps.yml b/.azure-pipelines/windows-release/msi-steps.yml
index f7bff162f8e02..a460eb1bac8fe 100644
--- a/.azure-pipelines/windows-release/msi-steps.yml
+++ b/.azure-pipelines/windows-release/msi-steps.yml
@@ -54,6 +54,7 @@ steps:
   - powershell: |
       copy $(Build.BinariesDirectory)\amd64\Activate.ps1 Lib\venv\scripts\common\Activate.ps1 -Force
     displayName: 'Copy signed files into sources'
+    condition: and(succeeded(), variables['SigningCertificate'])
 
   - script: |
       call Tools\msi\get_externals.bat
diff --git a/.azure-pipelines/windows-release/stage-build.yml b/.azure-pipelines/windows-release/stage-build.yml
index c98576ef9705c..60d72b282d1e5 100644
--- a/.azure-pipelines/windows-release/stage-build.yml
+++ b/.azure-pipelines/windows-release/stage-build.yml
@@ -16,14 +16,16 @@ jobs:
     env:
       BUILDDIR: $(Build.BinariesDirectory)\Doc
 
-  #- powershell: iwr "https://www.python.org/ftp/python/3.7.3/python373.chm" -OutFile "$(Build.BinariesDirectory)\python390a0.chm"
-  #  displayName: 'Cheat at building CHM docs'
-
   - script: Doc\make.bat htmlhelp
     displayName: 'Build CHM docs'
     env:
       BUILDDIR: $(Build.BinariesDirectory)\Doc
 
+  #- powershell: |
+  #    mkdir -Force "$(Build.BinariesDirectory)\Doc\htmlhelp"
+  #    iwr "https://www.python.org/ftp/python/3.8.0/python380.chm" -OutFile "$(Build.BinariesDirectory)\Doc\htmlhelp\python390a0.chm"
+  #  displayName: 'Cheat at building CHM docs'
+
   - task: CopyFiles at 2
     displayName: 'Assemble artifact: Doc'
     inputs:
@@ -65,6 +67,16 @@ jobs:
         Arch: amd64
         Platform: x64
         Configuration: Debug
+      arm64:
+        Name: arm64
+        Arch: arm64
+        Platform: ARM64
+        Configuration: Release
+      arm64_d:
+        Name: arm64_d
+        Arch: arm64
+        Platform: ARM64
+        Configuration: Debug
 
   steps:
     - template: ./build-steps.yml
diff --git a/.azure-pipelines/windows-release/stage-layout-embed.yml b/.azure-pipelines/windows-release/stage-layout-embed.yml
index 09857ff676b35..3306e1cbc49d9 100644
--- a/.azure-pipelines/windows-release/stage-layout-embed.yml
+++ b/.azure-pipelines/windows-release/stage-layout-embed.yml
@@ -19,6 +19,11 @@ jobs:
         Name: amd64
         Python: $(Build.BinariesDirectory)\bin\python.exe
         PYTHONHOME: $(Build.SourcesDirectory)
+      arm64:
+        Name: arm64
+        HostArch: amd64
+        Python: $(Build.BinariesDirectory)\bin_amd64\python.exe
+        PYTHONHOME: $(Build.SourcesDirectory)
 
   steps:
   - template: ./checkout.yml
diff --git a/.azure-pipelines/windows-release/stage-layout-full.yml b/.azure-pipelines/windows-release/stage-layout-full.yml
index 12c347239013c..78bc1b3975e93 100644
--- a/.azure-pipelines/windows-release/stage-layout-full.yml
+++ b/.azure-pipelines/windows-release/stage-layout-full.yml
@@ -13,11 +13,18 @@ jobs:
     matrix:
       win32:
         Name: win32
-        Python: $(Build.BinariesDirectory)\bin_$(Name)\python.exe
+        Python: $(Build.BinariesDirectory)\bin\python.exe
         PYTHONHOME: $(Build.SourcesDirectory)
+        TclLibrary: $(Build.BinariesDirectory)\tcltk_lib\tcl8
       amd64:
         Name: amd64
-        Python: $(Build.BinariesDirectory)\bin_$(Name)\python.exe
+        Python: $(Build.BinariesDirectory)\bin\python.exe
+        PYTHONHOME: $(Build.SourcesDirectory)
+        TclLibrary: $(Build.BinariesDirectory)\tcltk_lib\tcl8
+      arm64:
+        Name: arm64
+        HostArch: amd64
+        Python: $(Build.BinariesDirectory)\bin_amd64\python.exe
         PYTHONHOME: $(Build.SourcesDirectory)
 
   steps:
@@ -43,13 +50,15 @@ jobs:
 
   - task: DownloadPipelineArtifact at 1
     displayName: 'Download artifact: tcltk_lib_$(Name)'
+    condition: and(succeeded(), variables['TclLibrary'])
     inputs:
       artifactName: tcltk_lib_$(Name)
       targetPath: $(Build.BinariesDirectory)\tcltk_lib
 
   - powershell: |
-      copy $(Build.BinariesDirectory)\bin\Activate.ps1 Lib\venv\scripts\common\Activate.ps1 -Force
+      copy "$(Build.BinariesDirectory)\bin\Activate.ps1" Lib\venv\scripts\common\Activate.ps1 -Force
     displayName: 'Copy signed files into sources'
+    condition: and(succeeded(), variables['SigningCertificate'])
 
   - template: ./layout-command.yml
 
@@ -57,7 +66,7 @@ jobs:
       $(LayoutCmd) --copy "$(Build.ArtifactStagingDirectory)\layout" --preset-default
     displayName: 'Generate full layout'
     env:
-      TCL_LIBRARY: $(Build.BinariesDirectory)\tcltk_lib\tcl8
+      TCL_LIBRARY: $(TclLibrary)
 
   - task: PublishPipelineArtifact at 0
     displayName: 'Publish Artifact: layout_full_$(Name)'
diff --git a/.azure-pipelines/windows-release/stage-layout-msix.yml b/.azure-pipelines/windows-release/stage-layout-msix.yml
index ba86392f3ec69..60a5c9ea5435c 100644
--- a/.azure-pipelines/windows-release/stage-layout-msix.yml
+++ b/.azure-pipelines/windows-release/stage-layout-msix.yml
@@ -12,11 +12,18 @@ jobs:
     matrix:
       #win32:
       #  Name: win32
-      #  Python: $(Build.BinariesDirectory)\bin_$(Name)\python.exe
+      #  Python: $(Build.BinariesDirectory)\bin\python.exe
       #  PYTHONHOME: $(Build.SourcesDirectory)
+      #  TclLibrary: $(Build.BinariesDirectory)\tcltk_lib\tcl8
       amd64:
         Name: amd64
-        Python: $(Build.BinariesDirectory)\bin_$(Name)\python.exe
+        Python: $(Build.BinariesDirectory)\bin\python.exe
+        PYTHONHOME: $(Build.SourcesDirectory)
+        TclLibrary: $(Build.BinariesDirectory)\tcltk_lib\tcl8
+      arm64:
+        Name: arm64
+        HostArch: amd64
+        Python: $(Build.BinariesDirectory)\bin_amd64\python.exe
         PYTHONHOME: $(Build.SourcesDirectory)
 
   steps:
@@ -36,13 +43,15 @@ jobs:
 
   - task: DownloadPipelineArtifact at 1
     displayName: 'Download artifact: tcltk_lib_$(Name)'
+    condition: and(succeeded(), variables['TclLibrary'])
     inputs:
       artifactName: tcltk_lib_$(Name)
       targetPath: $(Build.BinariesDirectory)\tcltk_lib
 
   - powershell: |
-      copy $(Build.BinariesDirectory)\bin\Activate.ps1 Lib\venv\scripts\common\Activate.ps1 -Force
+      copy "$(Build.BinariesDirectory)\bin\Activate.ps1" Lib\venv\scripts\common\Activate.ps1 -Force
     displayName: 'Copy signed files into sources'
+    condition: and(succeeded(), variables['SigningCertificate'])
 
   - template: ./layout-command.yml
 
@@ -51,7 +60,7 @@ jobs:
       $(LayoutCmd) --copy "$(Build.ArtifactStagingDirectory)\appx-store" --preset-appx --precompile
     displayName: 'Generate store APPX layout'
     env:
-      TCL_LIBRARY: $(Build.BinariesDirectory)\tcltk_lib\tcl8
+      TCL_LIBRARY: $(TclLibrary)
 
   - task: PublishPipelineArtifact at 0
     displayName: 'Publish Artifact: layout_appxstore_$(Name)'
@@ -79,7 +88,7 @@ jobs:
       $(LayoutCmd) --copy "$(Build.ArtifactStagingDirectory)\appx" --preset-appx --precompile --include-symbols --include-tests
     displayName: 'Generate sideloading APPX layout'
     env:
-      TCL_LIBRARY: $(Build.BinariesDirectory)\tcltk_lib\tcl8
+      TCL_LIBRARY: $(TclLibrary)
 
   - task: PublishPipelineArtifact at 0
     displayName: 'Publish Artifact: layout_appx_$(Name)'
diff --git a/.azure-pipelines/windows-release/stage-layout-nuget.yml b/.azure-pipelines/windows-release/stage-layout-nuget.yml
index 7954c4547f50a..7e20f89530349 100644
--- a/.azure-pipelines/windows-release/stage-layout-nuget.yml
+++ b/.azure-pipelines/windows-release/stage-layout-nuget.yml
@@ -13,11 +13,16 @@ jobs:
     matrix:
       win32:
         Name: win32
-        Python: $(Build.BinariesDirectory)\bin_$(Name)\python.exe
+        Python: $(Build.BinariesDirectory)\bin\python.exe
         PYTHONHOME: $(Build.SourcesDirectory)
       amd64:
         Name: amd64
-        Python: $(Build.BinariesDirectory)\bin_$(Name)\python.exe
+        Python: $(Build.BinariesDirectory)\bin\python.exe
+        PYTHONHOME: $(Build.SourcesDirectory)
+      arm64:
+        Name: arm64
+        HostArch: amd64
+        Python: $(Build.BinariesDirectory)\bin_amd64\python.exe
         PYTHONHOME: $(Build.SourcesDirectory)
 
   steps:
@@ -32,14 +37,13 @@ jobs:
   - powershell: |
       copy $(Build.BinariesDirectory)\bin\Activate.ps1 Lib\venv\scripts\common\Activate.ps1 -Force
     displayName: 'Copy signed files into sources'
+    condition: and(succeeded(), variables['SigningCertificate'])
 
   - template: ./layout-command.yml
 
   - powershell: |
       $(LayoutCmd) --copy "$(Build.ArtifactStagingDirectory)\nuget" --preset-nuget
     displayName: 'Generate nuget layout'
-    env:
-      TCL_LIBRARY: $(Build.BinariesDirectory)\bin_$(Name)\tcl\tcl8
 
   - task: PublishPipelineArtifact at 0
     displayName: 'Publish Artifact: layout_nuget_$(Name)'
diff --git a/.azure-pipelines/windows-release/stage-pack-msix.yml b/.azure-pipelines/windows-release/stage-pack-msix.yml
index eebc63fb8809b..f17ba9628e21b 100644
--- a/.azure-pipelines/windows-release/stage-pack-msix.yml
+++ b/.azure-pipelines/windows-release/stage-pack-msix.yml
@@ -20,6 +20,16 @@ jobs:
         Artifact: appxstore
         Suffix: -store
         Upload: true
+      arm64:
+        Name: arm64
+        Artifact: appx
+        Suffix:
+        ShouldSign: true
+      arm64_store:
+        Name: arm64
+        Artifact: appxstore
+        Suffix: -store
+        Upload: true
 
   steps:
   - template: ./checkout.yml
diff --git a/.azure-pipelines/windows-release/stage-pack-nuget.yml b/.azure-pipelines/windows-release/stage-pack-nuget.yml
index f59bbe9b39a8d..34619fc5fdc31 100644
--- a/.azure-pipelines/windows-release/stage-pack-nuget.yml
+++ b/.azure-pipelines/windows-release/stage-pack-nuget.yml
@@ -15,6 +15,8 @@ jobs:
         Name: amd64
       win32:
         Name: win32
+      arm64:
+        Name: arm64
 
   steps:
   - checkout: none
diff --git a/.azure-pipelines/windows-release/stage-publish-nugetorg.yml b/.azure-pipelines/windows-release/stage-publish-nugetorg.yml
index 570cdb3ec57f0..5aba048cd72a6 100644
--- a/.azure-pipelines/windows-release/stage-publish-nugetorg.yml
+++ b/.azure-pipelines/windows-release/stage-publish-nugetorg.yml
@@ -31,6 +31,11 @@ jobs:
       buildVersionToDownload: specific
       buildId: $(BuildToPublish)
 
+  - powershell: gci pythonarm*.nupkg | %{ Write-Host "Not publishing: $($_.Name)"; gi $_ } | del
+    displayName: 'Prevent publishing ARM/ARM64 packages'
+    workingDirectory: '$(Build.BinariesDirectory)\nuget'
+    condition: and(succeeded(), not(variables['PublishArmPackages']))
+
   - task: NuGetCommand at 2
     displayName: Push packages
     condition: and(succeeded(), eq(variables['SigningCertificate'], variables['__RealSigningCertificate']))
diff --git a/.azure-pipelines/windows-release/stage-publish-pythonorg.yml b/.azure-pipelines/windows-release/stage-publish-pythonorg.yml
index 2dd354a8c276f..6c61e9ac3bdbb 100644
--- a/.azure-pipelines/windows-release/stage-publish-pythonorg.yml
+++ b/.azure-pipelines/windows-release/stage-publish-pythonorg.yml
@@ -39,6 +39,10 @@ jobs:
       artifactName: embed
       downloadPath: $(Build.BinariesDirectory)
 
+  - powershell: gci *embed-arm*.zip | %{ Write-Host "Not publishing: $($_.Name)"; gi $_ } | del
+    displayName: 'Prevent publishing ARM/ARM64 packages'
+    workingDirectory: '$(Build.BinariesDirectory)\embed'
+    condition: and(succeeded(), not(variables['PublishArmPackages']))
 
   - task: DownloadPipelineArtifact at 1
     displayName: 'Download artifact from $(BuildToPublish): Doc'
diff --git a/.azure-pipelines/windows-release/stage-sign.yml b/.azure-pipelines/windows-release/stage-sign.yml
index 2307c6c9c8f97..a0adc0581229d 100644
--- a/.azure-pipelines/windows-release/stage-sign.yml
+++ b/.azure-pipelines/windows-release/stage-sign.yml
@@ -19,6 +19,8 @@ jobs:
         Name: win32
       amd64:
         Name: amd64
+      arm64:
+        Name: arm64
 
   steps:
   - template: ./checkout.yml
diff --git a/.azure-pipelines/windows-steps.yml b/.azure-pipelines/windows-steps.yml
index 794a23a5d77e8..f502c40637c31 100644
--- a/.azure-pipelines/windows-steps.yml
+++ b/.azure-pipelines/windows-steps.yml
@@ -19,9 +19,11 @@ steps:
 
 - script: python.bat -m test.pythoninfo
   displayName: 'Display build info'
+  condition: and(succeeded(), variables['testRunPlatform'])
 
 - script: PCbuild\rt.bat -q -uall -u-cpu -rwW --slowest --timeout=1200 -j0 --junit-xml="$(Build.BinariesDirectory)\test-results.xml" --tempdir="$(Build.BinariesDirectory)\test"
   displayName: 'Tests'
+  condition: and(succeeded(), variables['testRunPlatform'])
   env:
     PREFIX: $(Py_OutDir)\$(arch)
 
@@ -32,4 +34,4 @@ steps:
     mergeTestResults: true
     testRunTitle: $(testRunTitle)
     platform: $(testRunPlatform)
-  condition: succeededOrFailed()
+  condition: and(succeededOrFailed(), variables['testRunPlatform'])
diff --git a/Misc/NEWS.d/next/Windows/2019-11-14-08-57-50.bpo-33125.EN5MWS.rst b/Misc/NEWS.d/next/Windows/2019-11-14-08-57-50.bpo-33125.EN5MWS.rst
new file mode 100644
index 0000000000000..0bc98c1a2fae7
--- /dev/null
+++ b/Misc/NEWS.d/next/Windows/2019-11-14-08-57-50.bpo-33125.EN5MWS.rst
@@ -0,0 +1 @@
+Add support for building and releasing Windows ARM64 packages.
diff --git a/PC/layout/main.py b/PC/layout/main.py
index 3ca49d08e8f98..305cb517d0f71 100644
--- a/PC/layout/main.py
+++ b/PC/layout/main.py
@@ -285,14 +285,13 @@ def _compile_one_py(src, dest, name, optimize, checked=True):
         log_warning("Failed to compile {}", src)
         return None
 
+
 # name argument added to address bpo-37641
 def _py_temp_compile(src, name, ns, dest_dir=None, checked=True):
     if not ns.precompile or src not in PY_FILES or src.parent in DATA_DIRS:
         return None
     dest = (dest_dir or ns.temp) / (src.stem + ".pyc")
-    return _compile_one_py(
-        src, dest, name, optimize=2, checked=checked
-    )
+    return _compile_one_py(src, dest, name, optimize=2, checked=checked)
 
 
 def _write_to_zip(zf, dest, src, ns, checked=True):
@@ -496,6 +495,13 @@ def main():
     parser.add_argument(
         "-b", "--build", metavar="dir", help="Specify the build directory", type=Path
     )
+    parser.add_argument(
+        "--arch",
+        metavar="architecture",
+        help="Specify the target architecture",
+        type=str,
+        default=None,
+    )
     parser.add_argument(
         "--doc-build",
         metavar="dir",
@@ -587,6 +593,8 @@ def main():
         ns.doc_build = (Path.cwd() / ns.doc_build).resolve()
     if ns.include_cat and not ns.include_cat.is_absolute():
         ns.include_cat = (Path.cwd() / ns.include_cat).resolve()
+    if not ns.arch:
+        ns.arch = "amd64" if sys.maxsize > 2 ** 32 else "win32"
 
     if ns.copy and not ns.copy.is_absolute():
         ns.copy = (Path.cwd() / ns.copy).resolve()
@@ -602,6 +610,7 @@ def main():
 Source: {ns.source}
 Build:  {ns.build}
 Temp:   {ns.temp}
+Arch:   {ns.arch}
 
 Copy to: {ns.copy}
 Zip to:  {ns.zip}
@@ -609,6 +618,15 @@ def main():
         ns=ns,
     )
 
+    if ns.arch not in ("win32", "amd64", "arm32", "arm64"):
+        log_error("--arch is not a valid value (win32, amd64, arm32, arm64)")
+        return 4
+    if ns.arch in ("arm32", "arm64"):
+        for n in ("include_idle", "include_tcltk"):
+            if getattr(ns, n):
+                log_warning(f"Disabling --{n.replace('_', '-')} on unsupported platform")
+                setattr(ns, n, False)
+
     if ns.include_idle and not ns.include_tcltk:
         log_warning("Assuming --include-tcltk to support --include-idle")
         ns.include_tcltk = True
diff --git a/PC/layout/support/appxmanifest.py b/PC/layout/support/appxmanifest.py
index de5813a2536ae..9e008f793cf55 100644
--- a/PC/layout/support/appxmanifest.py
+++ b/PC/layout/support/appxmanifest.py
@@ -28,7 +28,14 @@
     ),
     DisplayName="Python {}".format(VER_DOT),
     Description="The Python {} runtime and console.".format(VER_DOT),
-    ProcessorArchitecture="x64" if IS_X64 else "x86",
+)
+
+APPX_PLATFORM_DATA = dict(
+    _keys=("ProcessorArchitecture",),
+    win32=("x86",),
+    amd64=("x64",),
+    arm32=("arm",),
+    arm64=("arm64",),
 )
 
 PYTHON_VE_DATA = dict(
@@ -65,7 +72,7 @@
     BackgroundColor="transparent",
 )
 
-PY_PNG = '_resources/py.png'
+PY_PNG = "_resources/py.png"
 
 APPXMANIFEST_NS = {
     "": "http://schemas.microsoft.com/appx/manifest/foundation/windows10",
@@ -147,18 +154,22 @@
 
 SCCD_FILENAME = "PC/classicAppCompat.sccd"
 
+SPECIAL_LOOKUP = object()
+
 REGISTRY = {
     "HKCU\\Software\\Python\\PythonCore": {
         VER_DOT: {
             "DisplayName": APPX_DATA["DisplayName"],
             "SupportUrl": "https://www.python.org/",
-            "SysArchitecture": "64bit" if IS_X64 else "32bit",
+            "SysArchitecture": SPECIAL_LOOKUP,
             "SysVersion": VER_DOT,
             "Version": "{}.{}.{}".format(VER_MAJOR, VER_MINOR, VER_MICRO),
             "InstallPath": {
                 "": "[{AppVPackageRoot}]",
                 "ExecutablePath": "[{{AppVPackageRoot}}]\\python{}.exe".format(VER_DOT),
-                "WindowedExecutablePath": "[{{AppVPackageRoot}}]\\pythonw{}.exe".format(VER_DOT),
+                "WindowedExecutablePath": "[{{AppVPackageRoot}}]\\pythonw{}.exe".format(
+                    VER_DOT
+                ),
             },
             "Help": {
                 "Main Python Documentation": {
@@ -338,6 +349,16 @@ def _get_registry_entries(ns, root="", d=None):
                 if len(fullkey.parts) > 1:
                     yield str(fullkey), None, None
             yield from _get_registry_entries(ns, fullkey, value)
+        elif value is SPECIAL_LOOKUP:
+            if key == "SysArchitecture":
+                return {
+                    "win32": "32bit",
+                    "amd64": "64bit",
+                    "arm32": "32bit",
+                    "arm64": "64bit",
+                }[ns.arch]
+            else:
+                raise ValueError(f"Key '{key}' unhandled for special lookup")
         elif len(r.parts) > 1:
             yield str(r), key, value
 
@@ -376,14 +397,18 @@ def get_appxmanifest(ns):
     NS = APPXMANIFEST_NS
     QN = ET.QName
 
+    data = dict(APPX_DATA)
+    for k, v in zip(APPX_PLATFORM_DATA["_keys"], APPX_PLATFORM_DATA[ns.arch]):
+        data[k] = v
+
     node = xml.find("m:Identity", NS)
     for k in node.keys():
-        value = APPX_DATA.get(k)
+        value = data.get(k)
         if value:
             node.set(k, value)
 
     for node in xml.find("m:Properties", NS):
-        value = APPX_DATA.get(node.tag.rpartition("}")[2])
+        value = data.get(node.tag.rpartition("}")[2])
         if value:
             node.text = value
 
@@ -405,7 +430,7 @@ def get_appxmanifest(ns):
         ["python", "python{}".format(VER_MAJOR), "python{}".format(VER_DOT)],
         PYTHON_VE_DATA,
         "console",
-        ("python.file", [".py"], '"%1"', 'Python File', PY_PNG),
+        ("python.file", [".py"], '"%1"', "Python File", PY_PNG),
     )
 
     add_application(
@@ -416,7 +441,7 @@ def get_appxmanifest(ns):
         ["pythonw", "pythonw{}".format(VER_MAJOR), "pythonw{}".format(VER_DOT)],
         PYTHONW_VE_DATA,
         "windows",
-        ("python.windowedfile", [".pyw"], '"%1"', 'Python File (no console)', PY_PNG),
+        ("python.windowedfile", [".pyw"], '"%1"', "Python File (no console)", PY_PNG),
     )
 
     if ns.include_pip and ns.include_launchers:
@@ -428,7 +453,7 @@ def get_appxmanifest(ns):
             ["pip", "pip{}".format(VER_MAJOR), "pip{}".format(VER_DOT)],
             PIP_VE_DATA,
             "console",
-            ("python.wheel", [".whl"], 'install "%1"', 'Python Wheel'),
+            ("python.wheel", [".whl"], 'install "%1"', "Python Wheel"),
         )
 
     if ns.include_idle and ns.include_launchers:
diff --git a/PC/layout/support/constants.py b/PC/layout/support/constants.py
index d76fa3bbf3b47..a8647631e9b4c 100644
--- a/PC/layout/support/constants.py
+++ b/PC/layout/support/constants.py
@@ -5,15 +5,31 @@
 __author__ = "Steve Dower <steve.dower at python.org>"
 __version__ = "3.8"
 
+import os
+import re
 import struct
 import sys
 
-VER_MAJOR, VER_MINOR, VER_MICRO, VER_FIELD4 = struct.pack(">i", sys.hexversion)
+
+def _unpack_hexversion():
+    try:
+        hexversion = int(os.getenv("PYTHON_HEXVERSION"), 16)
+    except (TypeError, ValueError):
+        hexversion = sys.hexversion
+    return struct.pack(">i", sys.hexversion)
+
+
+def _get_suffix(field4):
+    name = {0xA0: "a", 0xB0: "b", 0xC0: "c"}.get(field4 & 0xF0, "")
+    if name:
+        serial = field4 & 0x0F
+        return f"{name}{serial}"
+    return ""
+
+
+VER_MAJOR, VER_MINOR, VER_MICRO, VER_FIELD4 = _unpack_hexversion()
+VER_SUFFIX = _get_suffix(VER_FIELD4)
 VER_FIELD3 = VER_MICRO << 8 | VER_FIELD4
-VER_NAME = {"alpha": "a", "beta": "b", "candidate": "rc"}.get(
-    sys.version_info.releaselevel, ""
-)
-VER_SERIAL = sys.version_info.serial if VER_NAME else ""
 VER_DOT = "{}.{}".format(VER_MAJOR, VER_MINOR)
 
 PYTHON_DLL_NAME = "python{}{}.dll".format(VER_MAJOR, VER_MINOR)
@@ -21,8 +37,6 @@
 PYTHON_ZIP_NAME = "python{}{}.zip".format(VER_MAJOR, VER_MINOR)
 PYTHON_PTH_NAME = "python{}{}._pth".format(VER_MAJOR, VER_MINOR)
 
-PYTHON_CHM_NAME = "python{}{}{}{}{}.chm".format(
-    VER_MAJOR, VER_MINOR, VER_MICRO, VER_NAME, VER_SERIAL
+PYTHON_CHM_NAME = "python{}{}{}{}.chm".format(
+    VER_MAJOR, VER_MINOR, VER_MICRO, VER_SUFFIX
 )
-
-IS_X64 = sys.maxsize > 2 ** 32
diff --git a/PC/layout/support/nuspec.py b/PC/layout/support/nuspec.py
index ba26ff337e91e..b85095c555fe0 100644
--- a/PC/layout/support/nuspec.py
+++ b/PC/layout/support/nuspec.py
@@ -13,25 +13,21 @@
 NUSPEC_DATA = {
     "PYTHON_TAG": VER_DOT,
     "PYTHON_VERSION": os.getenv("PYTHON_NUSPEC_VERSION"),
-    "PYTHON_BITNESS": "64-bit" if IS_X64 else "32-bit",
-    "PACKAGENAME": os.getenv("PYTHON_NUSPEC_PACKAGENAME"),
-    "PACKAGETITLE": os.getenv("PYTHON_NUSPEC_PACKAGETITLE"),
     "FILELIST": r'    <file src="**\*" target="tools" />',
 }
 
-if not NUSPEC_DATA["PYTHON_VERSION"]:
-    if VER_NAME:
-        NUSPEC_DATA["PYTHON_VERSION"] = "{}.{}-{}{}".format(
-            VER_DOT, VER_MICRO, VER_NAME, VER_SERIAL
-        )
-    else:
-        NUSPEC_DATA["PYTHON_VERSION"] = "{}.{}".format(VER_DOT, VER_MICRO)
-
-if not NUSPEC_DATA["PACKAGETITLE"]:
-    NUSPEC_DATA["PACKAGETITLE"] = "Python" if IS_X64 else "Python (32-bit)"
+NUSPEC_PLATFORM_DATA = dict(
+    _keys=("PYTHON_BITNESS", "PACKAGENAME", "PACKAGETITLE"),
+    win32=("32-bit", "pythonx86", "Python (32-bit)"),
+    amd64=("64-bit", "python", "Python"),
+    arm32=("ARM", "pythonarm", "Python (ARM)"),
+    arm64=("ARM64", "pythonarm64", "Python (ARM64)"),
+)
 
-if not NUSPEC_DATA["PACKAGENAME"]:
-    NUSPEC_DATA["PACKAGENAME"] = "python" if IS_X64 else "pythonx86"
+if not NUSPEC_DATA["PYTHON_VERSION"]:
+    NUSPEC_DATA["PYTHON_VERSION"] = "{}.{}{}{}".format(
+        VER_DOT, VER_MICRO, "-" if VER_SUFFIX else "", VER_SUFFIX
+    )
 
 FILELIST_WITH_PROPS = r"""    <file src="**\*" exclude="python.props" target="tools" />
     <file src="python.props" target="build\native" />"""
@@ -56,11 +52,21 @@
 """
 
 
+def _get_nuspec_data_overrides(ns):
+    for k, v in zip(NUSPEC_PLATFORM_DATA["_keys"], NUSPEC_PLATFORM_DATA[ns.arch]):
+        ev = os.getenv("PYTHON_NUSPEC_" + k)
+        if ev:
+            yield k, ev
+        yield k, v
+
+
 def get_nuspec_layout(ns):
     if ns.include_all or ns.include_nuspec:
-        data = NUSPEC_DATA
+        data = dict(NUSPEC_DATA)
+        for k, v in _get_nuspec_data_overrides(ns):
+            if not data.get(k):
+                data[k] = v
         if ns.include_all or ns.include_props:
-            data = dict(data)
             data["FILELIST"] = FILELIST_WITH_PROPS
         nuspec = NUSPEC_TEMPLATE.format_map(data)
         yield "python.nuspec", ("python.nuspec", nuspec.encode("utf-8"))
diff --git a/PC/layout/support/props.py b/PC/layout/support/props.py
index 4d3b06195f6ed..b1560b5244762 100644
--- a/PC/layout/support/props.py
+++ b/PC/layout/support/props.py
@@ -18,15 +18,9 @@
 }
 
 if not PROPS_DATA["PYTHON_VERSION"]:
-    if VER_NAME:
-        PROPS_DATA["PYTHON_VERSION"] = "{}.{}-{}{}".format(
-            VER_DOT, VER_MICRO, VER_NAME, VER_SERIAL
-        )
-    else:
-        PROPS_DATA["PYTHON_VERSION"] = "{}.{}".format(VER_DOT, VER_MICRO)
-
-if not PROPS_DATA["PYTHON_PLATFORM"]:
-    PROPS_DATA["PYTHON_PLATFORM"] = "x64" if IS_X64 else "Win32"
+    PROPS_DATA["PYTHON_VERSION"] = "{}.{}{}{}".format(
+        VER_DOT, VER_MICRO, "-" if VER_SUFFIX else "", VER_SUFFIX
+    )
 
 PROPS_DATA["PYTHON_TARGET"] = "_GetPythonRuntimeFilesDependsOn{}{}_{}".format(
     VER_MAJOR, VER_MINOR, PROPS_DATA["PYTHON_PLATFORM"]
@@ -94,5 +88,13 @@
 def get_props_layout(ns):
     if ns.include_all or ns.include_props:
         # TODO: Filter contents of props file according to included/excluded items
-        props = PROPS_TEMPLATE.format_map(PROPS_DATA)
+        d = dict(PROPS_DATA)
+        if not d.get("PYTHON_PLATFORM"):
+            d["PYTHON_PLATFORM"] = {
+                "win32": "Win32",
+                "amd64": "X64",
+                "arm32": "ARM",
+                "arm64": "ARM64",
+            }[ns.arch]
+        props = PROPS_TEMPLATE.format_map(d)
         yield "python.props", ("python.props", props.encode("utf-8"))
diff --git a/PCbuild/build.bat b/PCbuild/build.bat
index bce599329e73a..623409c24ec04 100644
--- a/PCbuild/build.bat
+++ b/PCbuild/build.bat
@@ -57,7 +57,7 @@ set conf=Release
 set target=Build
 set dir=%~dp0
 set parallel=/m
-set verbose=/nologo /v:m
+set verbose=/nologo /v:m /clp:summary
 set kill=
 set do_pgo=
 set pgo_job=-m test --pgo
diff --git a/PCbuild/find_msbuild.bat b/PCbuild/find_msbuild.bat
index a2810f09c45e2..bc9d00c22c826 100644
--- a/PCbuild/find_msbuild.bat
+++ b/PCbuild/find_msbuild.bat
@@ -32,7 +32,7 @@
 @rem VS 2017 and later provide vswhere.exe, which can be used
 @if not exist "%ProgramFiles(x86)%\Microsoft Visual Studio\Installer\vswhere.exe" goto :skip_vswhere
 @set _Py_MSBuild_Root=
- at for /F "tokens=*" %%i in ('"%ProgramFiles(x86)%\Microsoft Visual Studio\Installer\vswhere.exe" -property installationPath -latest') DO @(set _Py_MSBuild_Root=%%i\MSBuild)
+ at for /F "tokens=*" %%i in ('"%ProgramFiles(x86)%\Microsoft Visual Studio\Installer\vswhere.exe" -property installationPath -latest -prerelease') DO @(set _Py_MSBuild_Root=%%i\MSBuild)
 @if not defined _Py_MSBuild_Root goto :skip_vswhere
 @for %%j in (Current 15.0) DO @if exist "%_Py_MSBuild_Root%\%%j\Bin\msbuild.exe" (set MSBUILD="%_Py_MSBuild_Root%\%%j\Bin\msbuild.exe")
 @set _Py_MSBuild_Root=
diff --git a/PCbuild/get_externals.bat b/PCbuild/get_externals.bat
index 100149e83c164..f6daf325ef537 100644
--- a/PCbuild/get_externals.bat
+++ b/PCbuild/get_externals.bat
@@ -52,7 +52,7 @@ echo.Fetching external libraries...
 
 set libraries=
 set libraries=%libraries%                                       bzip2-1.0.6
-if NOT "%IncludeLibffiSrc%"=="false" set libraries=%libraries%  libffi-3.3.0-rc0-r1
+if NOT "%IncludeLibffiSrc%"=="false" set libraries=%libraries%  libffi
 if NOT "%IncludeSSLSrc%"=="false" set libraries=%libraries%     openssl-1.1.1d
 set libraries=%libraries%                                       sqlite-3.28.0.0
 if NOT "%IncludeTkinterSrc%"=="false" set libraries=%libraries% tcl-core-8.6.9.0
diff --git a/PCbuild/pcbuild.proj b/PCbuild/pcbuild.proj
index 35f173ff864ea..22a9eed18d42b 100644
--- a/PCbuild/pcbuild.proj
+++ b/PCbuild/pcbuild.proj
@@ -60,7 +60,7 @@
     <!-- _ssl will build _socket as well, which may cause conflicts in parallel builds -->
     <ExtensionModules Include="_socket" Condition="!$(IncludeSSL) or !$(IncludeExternals)" />
     <ExternalModules Include="_ssl;_hashlib" Condition="$(IncludeSSL)" />
-    <ExternalModules Include="_tkinter" Condition="$(IncludeTkinter)" />
+    <ExternalModules Include="_tkinter" Condition="$(IncludeTkinter) and $(Platform) != 'ARM' and $(Platform) != 'ARM64'" />
     <ExtensionModules Include="@(ExternalModules->'%(Identity)')" Condition="$(IncludeExternals)" />
     <Projects Include="@(ExtensionModules->'%(Identity).vcxproj')" Condition="$(IncludeExtensions)" />
     <!-- Test modules -->
diff --git a/PCbuild/prepare_libffi.bat b/PCbuild/prepare_libffi.bat
index c65a5f7010bd0..f41ba83379af9 100644
--- a/PCbuild/prepare_libffi.bat
+++ b/PCbuild/prepare_libffi.bat
@@ -93,7 +93,10 @@ echo LIBFFI_SOURCE: %LIBFFI_SOURCE%
 echo MSVCC        : %MSVCC%
 echo.
 
-if not exist Makefile.in (%SH% -lc "(cd $LIBFFI_SOURCE; ./autogen.sh;)")
+if not exist Makefile.in (
+    %SH% -lc "(cd $LIBFFI_SOURCE; ./autogen.sh;)"
+    if errorlevel 1 exit /B 1
+)
 
 if "%BUILD_X64%"=="1" call :BuildOne x64 x86_64-w64-cygwin x86_64-w64-cygwin
 if "%BUILD_X86%"=="1" call :BuildOne x86 i686-pc-cygwin i686-pc-cygwin
@@ -158,11 +161,13 @@ echo ================================================================
 echo Configure the build to generate fficonfig.h and ffi.h
 echo ================================================================
 %SH% -lc "(cd $OLDPWD; ./configure CC='%MSVCC% %ASSEMBLER% %BUILD_PDB%' CXX='%MSVCC% %ASSEMBLER% %BUILD_PDB%' LD='link' CPP='cl -nologo -EP' CXXCPP='cl -nologo -EP' CPPFLAGS='-DFFI_BUILDING_DLL' %BUILD_NOOPT% NM='dumpbin -symbols' STRIP=':' --build=$BUILD --host=$HOST;)"
+if errorlevel 1 exit /B %ERRORLEVEL%
 
 echo ================================================================
 echo Building libffi
 echo ================================================================
 %SH% -lc "(cd $OLDPWD; export PATH=/usr/bin:$PATH; cp src/%SRC_ARCHITECTURE%/ffitarget.h include; make; find .;)"
+if errorlevel 1 exit /B %ERRORLEVEL%
 
 REM Tests are not needed to produce artifacts
 if "%LIBFFI_TEST%" EQU "1" (
diff --git a/PCbuild/python_uwp.vcxproj b/PCbuild/python_uwp.vcxproj
index 14e138cbed3e0..5ff120a0da331 100644
--- a/PCbuild/python_uwp.vcxproj
+++ b/PCbuild/python_uwp.vcxproj
@@ -1,6 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|ARM">
+      <Configuration>Debug</Configuration>
+      <Platform>ARM</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|ARM64">
+      <Configuration>Debug</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
     <ProjectConfiguration Include="Debug|Win32">
       <Configuration>Debug</Configuration>
       <Platform>Win32</Platform>
@@ -9,6 +17,14 @@
       <Configuration>Debug</Configuration>
       <Platform>x64</Platform>
     </ProjectConfiguration>
+    <ProjectConfiguration Include="PGInstrument|ARM">
+      <Configuration>PGInstrument</Configuration>
+      <Platform>ARM</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="PGInstrument|ARM64">
+      <Configuration>PGInstrument</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
     <ProjectConfiguration Include="PGInstrument|Win32">
       <Configuration>PGInstrument</Configuration>
       <Platform>Win32</Platform>
@@ -17,6 +33,14 @@
       <Configuration>PGInstrument</Configuration>
       <Platform>x64</Platform>
     </ProjectConfiguration>
+    <ProjectConfiguration Include="PGUpdate|ARM">
+      <Configuration>PGUpdate</Configuration>
+      <Platform>ARM</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="PGUpdate|ARM64">
+      <Configuration>PGUpdate</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
     <ProjectConfiguration Include="PGUpdate|Win32">
       <Configuration>PGUpdate</Configuration>
       <Platform>Win32</Platform>
@@ -25,6 +49,14 @@
       <Configuration>PGUpdate</Configuration>
       <Platform>x64</Platform>
     </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|ARM">
+      <Configuration>Release</Configuration>
+      <Platform>ARM</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|ARM64">
+      <Configuration>Release</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
     <ProjectConfiguration Include="Release|Win32">
       <Configuration>Release</Configuration>
       <Platform>Win32</Platform>
diff --git a/PCbuild/pythonw_uwp.vcxproj b/PCbuild/pythonw_uwp.vcxproj
index e2c01710498ee..828d0d1ccac21 100644
--- a/PCbuild/pythonw_uwp.vcxproj
+++ b/PCbuild/pythonw_uwp.vcxproj
@@ -1,6 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|ARM">
+      <Configuration>Debug</Configuration>
+      <Platform>ARM</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|ARM64">
+      <Configuration>Debug</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
     <ProjectConfiguration Include="Debug|Win32">
       <Configuration>Debug</Configuration>
       <Platform>Win32</Platform>
@@ -9,6 +17,14 @@
       <Configuration>Debug</Configuration>
       <Platform>x64</Platform>
     </ProjectConfiguration>
+    <ProjectConfiguration Include="PGInstrument|ARM">
+      <Configuration>PGInstrument</Configuration>
+      <Platform>ARM</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="PGInstrument|ARM64">
+      <Configuration>PGInstrument</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
     <ProjectConfiguration Include="PGInstrument|Win32">
       <Configuration>PGInstrument</Configuration>
       <Platform>Win32</Platform>
@@ -17,6 +33,14 @@
       <Configuration>PGInstrument</Configuration>
       <Platform>x64</Platform>
     </ProjectConfiguration>
+    <ProjectConfiguration Include="PGUpdate|ARM">
+      <Configuration>PGUpdate</Configuration>
+      <Platform>ARM</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="PGUpdate|ARM64">
+      <Configuration>PGUpdate</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
     <ProjectConfiguration Include="PGUpdate|Win32">
       <Configuration>PGUpdate</Configuration>
       <Platform>Win32</Platform>
@@ -25,6 +49,14 @@
       <Configuration>PGUpdate</Configuration>
       <Platform>x64</Platform>
     </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|ARM">
+      <Configuration>Release</Configuration>
+      <Platform>ARM</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|ARM64">
+      <Configuration>Release</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
     <ProjectConfiguration Include="Release|Win32">
       <Configuration>Release</Configuration>
       <Platform>Win32</Platform>



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