diff --git a/bolt/test/lit.cfg.py b/bolt/test/lit.cfg.py
--- a/bolt/test/lit.cfg.py
+++ b/bolt/test/lit.cfg.py
@@ -66,9 +66,6 @@
 llvm_config.config.available_features.add('ld.lld')
 llvm_config.add_tool_substitutions([ToolSubst(r'ld\.lld', command=ld_lld)])
 
-config.substitutions.append(('%cflags', '-gdwarf-4'))
-config.substitutions.append(('%cxxflags', '-gdwarf-4'))
-
 link_fdata_cmd = os.path.join(config.test_source_root, 'link_fdata.py')
 
 tool_dirs = [config.llvm_tools_dir,