[3.12] GH-130396: Treat clang -Og as optimized for gdb tests (GH-130550) (#130573)

GH-130396: Treat clang -Og as optimized for gdb tests (GH-130550)

(cherry picked from commit 129db32)

Co-authored-by: Mark Shannon <[email protected]>

Author: vstinner

Lib/test/support/__init__.py

@@ -799,7 +799,11 @@ def python_is_optimized():
     for opt in cflags.split():
         if opt.startswith('-O'):
             final_opt = opt
-    return final_opt not in ('', '-O0', '-Og')
+    if sysconfig.get_config_var("CC") == "gcc":
+        non_opts = ('', '-O0', '-Og')
+    else:
+        non_opts = ('', '-O0')
+    return final_opt not in non_opts
 
 
 def check_cflags_pgo():