Index: compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp
===================================================================
--- compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp
+++ compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp
@@ -485,6 +485,7 @@
 #else
 #define REG_SP rsp
 #endif
+#if defined(PTRACE_GETREGSET)
 #define ARCH_IOVEC_FOR_GETREGSET
 // Support ptrace extensions even when compiled without required kernel support
 #ifndef NT_X86_XSTATE
@@ -492,6 +493,7 @@
 #endif
 // Compiler may use FP registers to store pointers.
 static constexpr uptr kExtraRegs[] = {NT_X86_XSTATE, NT_FPREGSET};
+#endif
 
 #elif defined(__powerpc__) || defined(__powerpc64__)
 typedef pt_regs regs_struct;