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Build slapd as position-independent executable (PIE) to take an advantage of
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address space layout randomization (ASLD).
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Author: Thomas Woerner <twoerner@redhat.com>
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--- openldap-2.4.24.orig/servers/slapd/Makefile.in
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+++ openldap-2.4.24/servers/slapd/Makefile.in
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@@ -266,7 +266,7 @@ libslapi.a: slapi/.libs/libslapi.a
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 	cp slapi/.libs/libslapi.a .
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 slapd: $(SLAPD_DEPENDS) @LIBSLAPI@
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-	$(LTLINK) -o $@ $(SLAPD_OBJECTS) $(LIBS) \
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+	$(LTLINK) -pie -Wl,-z,defs -o $@ $(SLAPD_OBJECTS) $(LIBS) \
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 		$(WRAP_LIBS)
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 	$(RM) $(SLAPTOOLS)
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 	for i in $(SLAPTOOLS); do \