added GLW_SOURCES for IRIX
diff --git a/configs/irix6-n32 b/configs/irix6-n32
index e0a8d91..5af15f5 100644
--- a/configs/irix6-n32
+++ b/configs/irix6-n32
@@ -11,6 +11,8 @@
 CXXFLAGS = -n32 -mips3 -O3 -ansi -woff 1174,1552
 MKLIB_OPTIONS = -archopt n32
 
+GLW_SOURCES = GLwDrawA.c GLwMDrawA.c
+
 LIB_DIR = $(TOP)/lib32
 
 APP_LIB_DEPS = -L$(LIB_DIR) -n32 -rpath $(LIB_DIR) -lglut -lGLU -lGL -lX11 -lXmu -lXi -lfpe -lm