add support for LDFLAGS env var
diff --git a/configs/default b/configs/default
index a7de3f8..620445f 100644
--- a/configs/default
+++ b/configs/default
@@ -20,6 +20,7 @@
 CXX = CC
 CFLAGS = -O
 CXXFLAGS = -O
+LDFLAGS =
 GLU_CFLAGS = 
 
 # Misc tools and flags