Blame SOURCES/add-relro-linker-option.patch

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