skip codegen tests in Python 2.4 windows

gistfile1.txt

diff --git a/sympy/test_external/test_codegen.py b/sympy/test_external/test_codegen.py
index 5245b79..9e2c5ac 100644
--- a/sympy/test_external/test_codegen.py
+++ b/sympy/test_external/test_codegen.py
@@ -33,6 +33,11 @@
 import tempfile
 import subprocess
 
+if sys.platform == 'win32' and sys.version_info < (2, 5):
+    # subprocess has problems in Windows Python 2.4, so skip the tests there
+    disabled = True
+else:
+    disabled = False
 
 # templates for the main program that will test the generated code.
 
@@ -251,14 +256,15 @@ def is_feasible(language, commands):
     except AssertionError:
         return False
 
-valid_lang_commands = []
-invalid_lang_compilers = []
-for lang, compiler in combinations_lang_compiler:
-    commands = compile_commands[compiler]
-    if is_feasible(lang, commands):
-        valid_lang_commands.append((lang, commands))
-    else:
-        invalid_lang_compilers.append((lang, compiler))
+if not disabled:
+    valid_lang_commands = []
+    invalid_lang_compilers = []
+    for lang, compiler in combinations_lang_compiler:
+        commands = compile_commands[compiler]
+        if is_feasible(lang, commands):
+            valid_lang_commands.append((lang, commands))
+        else:
+            invalid_lang_compilers.append((lang, compiler))
 
 # We test all language-compiler combinations, just to report what is skipped