https://bugs.gentoo.org/946578
https://gitlab.gnome.org/GNOME/gobject-introspection/-/commit/a2139dba59eac283a7f543ed737f038deebddc19

From a2139dba59eac283a7f543ed737f038deebddc19 Mon Sep 17 00:00:00 2001
From: Christoph Reiter <reiter.christoph@gmail.com>
Date: Wed, 28 Aug 2024 21:26:02 +0200
Subject: [PATCH] giscanner: remove dependency on distutils.msvccompiler

It was removed with setuptools 74.0.0. Since we still depend on the
MSVCCompiler class use new_compiler() to get it some other way.

Remove any reference to MSVC9Compiler, which was for Visual Studio 2008
which we no longer support anyway.

Fixes #515
---
 giscanner/ccompiler.py    |  7 +++----
 giscanner/msvccompiler.py | 14 +++++++-------
 2 files changed, 10 insertions(+), 11 deletions(-)

diff --git a/giscanner/ccompiler.py b/giscanner/ccompiler.py
index d0ed70a3c..9a732cd5e 100644
--- a/giscanner/ccompiler.py
+++ b/giscanner/ccompiler.py
@@ -26,7 +26,6 @@ import tempfile
 import sys
 import distutils
 
-from distutils.msvccompiler import MSVCCompiler
 from distutils.unixccompiler import UnixCCompiler
 from distutils.cygwinccompiler import Mingw32CCompiler
 from distutils.sysconfig import get_config_vars
@@ -167,7 +166,7 @@ class CCompiler(object):
         # Now, create the distutils ccompiler instance based on the info we have.
         if compiler_name == 'msvc':
             # For MSVC, we need to create a instance of a subclass of distutil's
-            # MSVC9Compiler class, as it does not provide a preprocess()
+            # MSVCCompiler class, as it does not provide a preprocess()
             # implementation
             from . import msvccompiler
             self.compiler = msvccompiler.get_msvc_compiler()
@@ -460,7 +459,7 @@ class CCompiler(object):
             return self.compiler.linker_exe
 
     def check_is_msvc(self):
-        return isinstance(self.compiler, MSVCCompiler)
+        return self.compiler.compiler_type == "msvc"
 
     # Private APIs
     def _set_cpp_options(self, options):
@@ -486,7 +485,7 @@ class CCompiler(object):
                     # macros for compiling using distutils
                     # get dropped for MSVC builds, so
                     # escape the escape character.
-                    if isinstance(self.compiler, MSVCCompiler):
+                    if self.check_is_msvc():
                         macro_value = macro_value.replace('\"', '\\\"')
                 macros.append((macro_name, macro_value))
             elif option.startswith('-U'):
diff --git a/giscanner/msvccompiler.py b/giscanner/msvccompiler.py
index 0a5439820..e333a80f5 100644
--- a/giscanner/msvccompiler.py
+++ b/giscanner/msvccompiler.py
@@ -19,30 +19,30 @@
 #
 
 import os
-import distutils
+from typing import Type
 
 from distutils.errors import DistutilsExecError, CompileError
-from distutils.ccompiler import CCompiler, gen_preprocess_options
+from distutils.ccompiler import CCompiler, gen_preprocess_options, new_compiler
 from distutils.dep_util import newer
 
 # Distutil's MSVCCompiler does not provide a preprocess()
 # Implementation, so do our own here.
 
 
+DistutilsMSVCCompiler: Type = type(new_compiler(compiler="msvc"))
+
+
 def get_msvc_compiler():
     return MSVCCompiler()
 
 
-class MSVCCompiler(distutils.msvccompiler.MSVCCompiler):
+class MSVCCompiler(DistutilsMSVCCompiler):
 
     def __init__(self, verbose=0, dry_run=0, force=0):
-        super(distutils.msvccompiler.MSVCCompiler, self).__init__()
+        super(DistutilsMSVCCompiler, self).__init__()
         CCompiler.__init__(self, verbose, dry_run, force)
         self.__paths = []
         self.__arch = None  # deprecated name
-        if os.name == 'nt':
-            if isinstance(self, distutils.msvc9compiler.MSVCCompiler):
-                self.__version = distutils.msvc9compiler.VERSION
         self.initialized = False
         self.preprocess_options = None
         if self.check_is_clang_cl():
-- 
GitLab