From 5af56c6f2a0d11df37fed7ecaaf321cf6926ba13 Mon Sep 17 00:00:00 2001
From: Steve Dower <steve.dower@python.org>
Date: Fri, 11 Jun 2021 21:35:40 +0100
Subject: [PATCH] bpo-44381: Windows build now allows enabling control flow
 guard (GH-26645)

---
 .../next/Build/2021-06-10-18-08-44.bpo-44381.Xpc1iX.rst       | 2 ++
 PCbuild/pyproject.props                                       | 4 ++--
 2 files changed, 4 insertions(+), 2 deletions(-)
 create mode 100644 Misc/NEWS.d/next/Build/2021-06-10-18-08-44.bpo-44381.Xpc1iX.rst

diff --git a/Misc/NEWS.d/next/Build/2021-06-10-18-08-44.bpo-44381.Xpc1iX.rst b/Misc/NEWS.d/next/Build/2021-06-10-18-08-44.bpo-44381.Xpc1iX.rst
new file mode 100644
index 00000000000..002112c4b55
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2021-06-10-18-08-44.bpo-44381.Xpc1iX.rst
@@ -0,0 +1,2 @@
+The Windows build now accepts :envvar:`EnableControlFlowGuard` set to
+``guard`` to enable CFG.
diff --git a/PCbuild/pyproject.props b/PCbuild/pyproject.props
index 834b27c86d4..d492b71dfba 100644
--- a/PCbuild/pyproject.props
+++ b/PCbuild/pyproject.props
@@ -44,11 +44,11 @@
       <CompileAs>Default</CompileAs>
       <SuppressStartupBanner>true</SuppressStartupBanner>
       <WholeProgramOptimization>true</WholeProgramOptimization>
-      <InlineFunctionExpansion Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">OnlyExplicitInline</InlineFunctionExpansion>
-      <InlineFunctionExpansion Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">OnlyExplicitInline</InlineFunctionExpansion>
+      <ControlFlowGuard Condition="$(EnableControlFlowGuard) != ''">$(EnableControlFlowGuard)</ControlFlowGuard>
       <AdditionalOptions>/utf-8 %(AdditionalOptions)</AdditionalOptions>
     </ClCompile>
     <ClCompile Condition="$(Configuration) == 'Debug'">
+      <InlineFunctionExpansion>OnlyExplicitInline</InlineFunctionExpansion>
       <Optimization>Disabled</Optimization>
       <WholeProgramOptimization>false</WholeProgramOptimization>
       <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>