distutils: add back gcc_version

older numpy depends on it and there are users building it directly via pip

Lib/distutils/cygwinccompiler.py

@@ -56,6 +56,7 @@
 from distutils.file_util import write_file
 from distutils.errors import (DistutilsExecError, CCompilerError,
         CompileError, UnknownFileError)
+from distutils.version import LooseVersion
 from distutils.spawn import find_executable
 from subprocess import Popen, check_output
 
@@ -114,6 +115,12 @@ def __init__(self, verbose=0, dry_run=0, force=0):
         self.cc = os.environ.get('CC', 'gcc')
         self.cxx = os.environ.get('CXX', 'g++')
 
+        # Older numpy dependend on this existing to check for ancient
+        # gcc versions. This doesn't make much sense with clang etc so
+        # just hardcode to something recent.
+        # https://github.com/numpy/numpy/pull/20333
+        self.gcc_version = LooseVersion("11.2.0")
+
         self.linker_dll = self.cc
         shared_option = "-shared"