Index: plugin/auth-pam/Makefile
===================================================================
--- plugin/auth-pam/Makefile.orig
+++ plugin/auth-pam/Makefile
@@ -15,10 +15,10 @@ endif
 # This directory is where we will look for openvpn-plugin.h
 INCLUDE=-I../..
 
-CC_FLAGS=-O2 -Wall -DDLOPEN_PAM=$(DLOPEN_PAM)
+CC_FLAGS=$(CFLAGS) -DDLOPEN_PAM=$(DLOPEN_PAM)
 
 openvpn-auth-pam.so : auth-pam.o pamdl.o
-	gcc ${CC_FLAGS} -fPIC -shared -Wl,-soname,openvpn-auth-pam.so -o openvpn-auth-pam.so auth-pam.o pamdl.o -lc $(LIBPAM)
+	gcc ${LDFLAGS} -fPIC -shared -Wl,-soname,openvpn-auth-pam.so -o openvpn-auth-pam.so auth-pam.o pamdl.o -lc $(LIBPAM)
 
 auth-pam.o : auth-pam.c pamdl.h
 	gcc ${CC_FLAGS} -fPIC -c ${INCLUDE} auth-pam.c
Index: plugin/down-root/Makefile
===================================================================
--- plugin/down-root/Makefile.orig
+++ plugin/down-root/Makefile
@@ -5,10 +5,10 @@
 # This directory is where we will look for openvpn-plugin.h
 INCLUDE=-I../..
 
-CC_FLAGS=-O2 -Wall
+CC_FLAGS=${CFLAGS}
 
 down-root.so : down-root.o
-	gcc ${CC_FLAGS} -fPIC -shared -Wl,-soname,openvpn-down-root.so -o openvpn-down-root.so down-root.o -lc
+	gcc ${LDFLAGS} -fPIC -shared -Wl,-soname,openvpn-down-root.so -o openvpn-down-root.so down-root.o -lc
 
 down-root.o : down-root.c
 	gcc ${CC_FLAGS} -fPIC -c ${INCLUDE} down-root.c