Index: compiler-rt/test/lit.common.cfg.py
===================================================================
--- compiler-rt/test/lit.common.cfg.py
+++ compiler-rt/test/lit.common.cfg.py
@@ -577,6 +577,11 @@
 elif config.use_lto and (not config.lto_supported):
   config.unsupported = True
 
+# Pick any extra flags passed in lit_config
+lit_config_cflags = lit_config.params.get('target_cflags', None)
+if lit_config_cflags:
+  extra_cflags += [lit_config_cflags]
+
 if config.use_lld and config.has_lld and not config.use_lto:
   extra_cflags += ["-fuse-ld=lld"]
 elif config.use_lld and (not config.has_lld):