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Fix undefined PTRACE_SETOPTIONS error, patch by grobian
diff --git a/libsandbox/trace.c b/libsandbox/trace.c
index 7c5ec17..eaf520f 100644
--- a/libsandbox/trace.c
+++ b/libsandbox/trace.c
@@ -425,7 +425,7 @@ void trace_main(const char *filename, char *const argv[])
SB_DEBUG("parent waiting for child (pid=%i) to signal", trace_pid);
while (!child_stopped)
sched_yield();
-#ifdef PTRACE_O_TRACESYSGOOD
+#if defined(PTRACE_O_TRACESYSGOOD) && defined(PTRACE_SETOPTIONS)
/* Not all kernel versions support this, so ignore return */
ptrace(PTRACE_SETOPTIONS, trace_pid, NULL, (void *)PTRACE_O_TRACESYSGOOD);
#endif
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