The upstream source provides no way to extend the CFLAGS by -g which is needed
for building the debug package. So instead of setting the variables, we add to
them.
--- a/Makefile
+++ b/Makefile
@@ -9,10 +9,10 @@
 
 
 
-INCL=
-LDFLAGS=
-LIBS=-lgcrypt -lpthread
-CFLAGS=-Wall -shared -fPIC -DPIC
+INCL +=
+LDFLAGS +=
+LIBS += -lgcrypt -lpthread
+CFLAGS += -Wall -shared -fPIC -DPIC
 
 
 PLUGIN=radiusplugin.so