From 39e4e4167cd0695723b1d3800460da7cfd1f0e87 Mon Sep 17 00:00:00 2001
From: rdb <git@rdb.name>
Date: Sun, 15 Oct 2023 11:43:42 +0200
Subject: [PATCH] CMake: Switch use of distutils.sysconfig to sysconfig in
 Python 3.12

Part of #1395
---
 dtool/Package.cmake | 36 ++++++++++++++++++++++++++----------
 1 file changed, 26 insertions(+), 10 deletions(-)

diff --git a/dtool/Package.cmake b/dtool/Package.cmake
index 0a0fb8ea39..29cf844274 100644
--- a/dtool/Package.cmake
+++ b/dtool/Package.cmake
@@ -257,16 +257,32 @@ if(HAVE_PYTHON)
     set(_ARCH_DIR ".")
 
   elseif(PYTHON_EXECUTABLE)
-    execute_process(
-      COMMAND ${PYTHON_EXECUTABLE}
-        -c "from distutils.sysconfig import get_python_lib; print(get_python_lib(False))"
-      OUTPUT_VARIABLE _LIB_DIR
-      OUTPUT_STRIP_TRAILING_WHITESPACE)
-    execute_process(
-      COMMAND ${PYTHON_EXECUTABLE}
-        -c "from distutils.sysconfig import get_python_lib; print(get_python_lib(True))"
-      OUTPUT_VARIABLE _ARCH_DIR
-      OUTPUT_STRIP_TRAILING_WHITESPACE)
+    # Python 3.12 drops the distutils module, so we have to use the newer
+    # sysconfig module instead.  Earlier versions of Python had the newer
+    # module too, but it was broken in Debian/Ubuntu, see #1230
+    if(PYTHON_VERSION_STRING VERSION_LESS "3.12")
+      execute_process(
+        COMMAND ${PYTHON_EXECUTABLE}
+          -c "from distutils.sysconfig import get_python_lib; print(get_python_lib(False))"
+        OUTPUT_VARIABLE _LIB_DIR
+        OUTPUT_STRIP_TRAILING_WHITESPACE)
+      execute_process(
+        COMMAND ${PYTHON_EXECUTABLE}
+          -c "from distutils.sysconfig import get_python_lib; print(get_python_lib(True))"
+        OUTPUT_VARIABLE _ARCH_DIR
+        OUTPUT_STRIP_TRAILING_WHITESPACE)
+    else()
+      execute_process(
+        COMMAND ${PYTHON_EXECUTABLE}
+          -c "import sysconfig; print(sysconfig.get_path('purelib'))"
+        OUTPUT_VARIABLE _LIB_DIR
+        OUTPUT_STRIP_TRAILING_WHITESPACE)
+      execute_process(
+        COMMAND ${PYTHON_EXECUTABLE}
+          -c "import sysconfig; print(sysconfig.get_path('platlib'))"
+        OUTPUT_VARIABLE _ARCH_DIR
+        OUTPUT_STRIP_TRAILING_WHITESPACE)
+    endif()
 
   else()
     set(_LIB_DIR "")