From 1e95b898f4bd8803e33b1e2bcf9d2e41f75fb70c Mon Sep 17 00:00:00 2001
From: Ned Deily <nad@python.org>
Date: Fri, 4 Dec 2020 23:02:09 -0500
Subject: [PATCH 1/2] bpo-41116: Fix setup.py test for macOS Tcl/Tk frameworks
 (GH-23649)

If no explicit macOS SDK was specified, setup.py should check for
Tcl and TK frameworks in /Library/Frameworks; the previous commit
inadvertently broke that test.
(cherry picked from commit 29afab6c5f656f07ac85c9b2cf089631b2557a11)

Co-authored-by: Ned Deily <nad@python.org>
---
 setup.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/setup.py b/setup.py
index bfe621d0b50da1..bd5f73692441cb 100644
--- a/setup.py
+++ b/setup.py
@@ -177,10 +177,11 @@ def macosx_sdk_root():
     m = re.search(r'-isysroot\s*(\S+)', cflags)
     if m is not None:
         MACOS_SDK_ROOT = m.group(1)
+        MACOS_SDK_SPECIFIED = MACOS_SDK_ROOT != '/'
     else:
         MACOS_SDK_ROOT = _osx_support._default_sysroot(
             sysconfig.get_config_var('CC'))
-    MACOS_SDK_SPECIFIED = MACOS_SDK_ROOT != '/'
+        MACOS_SDK_SPECIFIED = False
 
     return MACOS_SDK_ROOT
 

From b5ff5e84520242f4eb26eef71f1ce1b8067aa57d Mon Sep 17 00:00:00 2001
From: Ned Deily <nad@python.org>
Date: Fri, 4 Dec 2020 23:09:37 -0500
Subject: [PATCH 2/2] add blurb for 3.9.1 final

---
 .../NEWS.d/next/macOS/2020-12-04-23-09-11.bpo-41116.mSbXyV.rst | 3 +++
 1 file changed, 3 insertions(+)
 create mode 100644 Misc/NEWS.d/next/macOS/2020-12-04-23-09-11.bpo-41116.mSbXyV.rst

diff --git a/Misc/NEWS.d/next/macOS/2020-12-04-23-09-11.bpo-41116.mSbXyV.rst b/Misc/NEWS.d/next/macOS/2020-12-04-23-09-11.bpo-41116.mSbXyV.rst
new file mode 100644
index 00000000000000..2c8e5ea0297345
--- /dev/null
+++ b/Misc/NEWS.d/next/macOS/2020-12-04-23-09-11.bpo-41116.mSbXyV.rst
@@ -0,0 +1,3 @@
+If no explicit macOS SDK was specified, setup.py should check for Tcl and TK
+frameworks in /Library/Frameworks; the previous commit inadvertently broke
+that test.