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diff -up nss/coreconf/Linux.mk.relro nss/coreconf/Linux.mk
--- nss/coreconf/Linux.mk.relro 2013-04-09 14:29:45.943228682 -0700
+++ nss/coreconf/Linux.mk 2013-04-09 14:31:26.194953927 -0700
@@ -174,6 +174,12 @@ endif
endif
endif
+# harden DSOs/executables a bit against exploits
+ifeq (2.6,$(firstword $(sort 2.6 $(OS_RELEASE))))
+DSO_LDOPTS+=-Wl,-z,relro
+LDFLAGS += -Wl,-z,relro
+endif
+
USE_SYSTEM_ZLIB = 1
ZLIB_LIBS = -lz