diff -r 0d8fd6bb915f -r 934578b959f0 components/gcc5/Makefile
--- a/components/gcc5/Makefile	Thu Nov 03 22:18:09 2016 -0700
+++ b/components/gcc5/Makefile	Fri Nov 04 05:32:50 2016 -0700
@@ -68,6 +68,15 @@
 # /usr/lib/ld/map.noexbss destroys SPARC
 LD_MAP_NOEXBSS.sparc=
 
+# Mapfiles map.noexdata and map.noexbss mark the data + bss and bss
+# segments non executable on x86 and SPARC respectively. The protection
+# extends to the heap segment, if the heap is brk based, as is the case
+# with gcc. Since the introduction of NXHEAP, this is controlled
+# separately by the NXHEAP extension itself. Whether the heap should be
+# executable or not should be reevaluated. For now, try to avoid
+# "destruction" as hinted above.
+NXHEAP_MODE = $(NXHEAP_DISABLE)
+
 # for some reason the fixincludes target fails with bash on Solaris.
 CONFIG_SHELL = /bin/sh
 MAKESHELL = /bin/sh