From 0c50b8c0b8274d54d6b71ed7bd21057d3642f138 Mon Sep 17 00:00:00 2001
From: Eric Snow <ericsnowcurrently@gmail.com>
Date: Tue, 28 Sep 2021 12:18:28 -0600
Subject: bpo-45211: Remember the stdlib dir during startup. (gh-28586)

During runtime startup we figure out the stdlib dir but currently throw that information away. This change preserves it and exposes it via PyConfig.stdlib_dir, _Py_GetStdlibDir(), and sys._stdlib_dir.

https://bugs.python.org/issue45211
---
 Python/sysmodule.c | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'Python/sysmodule.c')

diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index 5dfa917e8f..6e7e45bf3f 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -2974,6 +2974,14 @@ _PySys_UpdateConfig(PyThreadState *tstate)
 
     SET_SYS("_xoptions", sys_create_xoptions_dict(config));
 
+    const wchar_t *stdlibdir = _Py_GetStdlibDir();
+    if (stdlibdir != NULL) {
+        SET_SYS_FROM_WSTR("_stdlib_dir", stdlibdir);
+    }
+    else {
+        PyDict_SetItemString(sysdict, "_stdlib_dir", Py_None);
+    }
+
 #undef SET_SYS_FROM_WSTR
 #undef COPY_LIST
 #undef COPY_WSTR
-- 
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