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-rw-r--r--lib/libc/x86/sys/Makefile.inc8
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/libc/x86/sys/Makefile.inc b/lib/libc/x86/sys/Makefile.inc
index 41e0d1a8ad66..eff3a1085ec6 100644
--- a/lib/libc/x86/sys/Makefile.inc
+++ b/lib/libc/x86/sys/Makefile.inc
@@ -12,3 +12,11 @@ MAN+= \
.if ${MACHINE_CPUARCH} == "amd64" && ${MK_HYPERV} != "no"
CFLAGS+= -DWANT_HYPERV
.endif
+# We can't use sanitizer instrumentation on ifuncs called during sanitizer
+# runtime startup.
+.if ${MK_ASAN} != "no"
+CFLAGS.__vdso_gettc.c+=-fno-sanitize=address
+.endif
+.if ${MK_UBSAN} != "no"
+CFLAGS.__vdso_gettc.c+=-fno-sanitize=undefined
+.endif