miniupnpd/Makefile.linux_nft: update CFLAGS / LDFLAGS

miniupnpd/Makefile.linux_nft

@@ -18,14 +18,17 @@
 #
 #
 CONFIG_OPTIONS += --firewall=nftables
-CFLAGS = -O -g #-DDEBUG
+#CFLAGS = -O -g #-DDEBUG
 CFLAGS ?= -Os
 CFLAGS += -fno-strict-aliasing
 CFLAGS += -fno-common
+CFLAGS += -fstack-protector -fPIE
+CFLAGS += -D_FORTIFY_SOURCE=2
 CPPFLAGS += -D_GNU_SOURCE
 CFLAGS += -Wall
 CFLAGS += -Wextra -Wstrict-prototypes -Wdeclaration-after-statement
 #CFLAGS += -Wno-missing-field-initializers
+LDFLAGS += -Wl,-z,now -Wl,-z,relro -pie
 CC ?= gcc
 RM = rm -f
 INSTALL = install