Issue #8605: Skip test_gdb if Python is compiled with optimizations.
diff --git a/Lib/test/test_gdb.py b/Lib/test/test_gdb.py
index e5d1222..bac8d36 100644
--- a/Lib/test/test_gdb.py
+++ b/Lib/test/test_gdb.py
@@ -9,6 +9,7 @@
 import sys
 import unittest
 import locale
+import sysconfig
 
 from test.support import run_unittest, findfile
 
@@ -664,6 +665,15 @@
                                     r".*\na = 1\nb = 2\nc = 3\n.*")
 
 def test_main():
+    cflags = sysconfig.get_config_vars()['PY_CFLAGS']
+    final_opt = ""
+    for opt in cflags.split():
+        if opt.startswith('-O'):
+            final_opt = opt
+    if final_opt and final_opt != '-O0':
+        raise unittest.SkipTest("Python was built with compiler optimizations, "
+                                "tests can't reliably succeed")
+
     run_unittest(PrettyPrintTests,
                  PyListTests,
                  StackNavigationTests,