Comment out driver-bflsc.c file from Makefile.am till one exists.
diff --git a/Makefile.am b/Makefile.am
index 717d88c..b890592 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -87,7 +87,7 @@ cgminer_SOURCES += usbutils.c
endif
if HAS_BFLSC
-cgminer_SOURCES += driver-bflsc.c
+# cgminer_SOURCES += driver-bflsc.c
endif
if HAS_BITFORCE