diff --git a/libgcc/config/gcn/unwind-gcn.c b/libgcc/config/gcn/unwind-gcn.c
index e014cc08243..eae741c55bb 100644
--- a/libgcc/config/gcn/unwind-gcn.c
+++ b/libgcc/config/gcn/unwind-gcn.c
@@ -24,6 +24,13 @@
 
 #include "unwind.h"
 
+_Unwind_Reason_Code
+_Unwind_RaiseException(struct _Unwind_Exception *exc __attribute__ ((__unused__)))
+{
+  __builtin_abort ();
+  return 0;
+}
+
 void
 _Unwind_DeleteException (struct _Unwind_Exception *exc)
 {
@@ -31,6 +38,13 @@ _Unwind_DeleteException (struct _Unwind_Exception *exc)
     (*exc->exception_cleanup) (_URC_FOREIGN_EXCEPTION_CAUGHT, exc);
 }
 
+_Unwind_Reason_Code
+_Unwind_Resume_or_Rethrow (struct _Unwind_Exception *exc __attribute__ ((__unused__)))
+{
+  __builtin_abort ();
+  return 0;
+}
+
 _Unwind_Reason_Code
 _Unwind_Backtrace(_Unwind_Trace_Fn trace, void * trace_argument)
 {
diff --git a/libgcc/config/nvptx/unwind-nvptx.c b/libgcc/config/nvptx/unwind-nvptx.c
index e014cc08243..eae741c55bb 100644
--- a/libgcc/config/nvptx/unwind-nvptx.c
+++ b/libgcc/config/nvptx/unwind-nvptx.c
@@ -24,6 +24,13 @@
 
 #include "unwind.h"
 
+_Unwind_Reason_Code
+_Unwind_RaiseException(struct _Unwind_Exception *exc __attribute__ ((__unused__)))
+{
+  __builtin_abort ();
+  return 0;
+}
+
 void
 _Unwind_DeleteException (struct _Unwind_Exception *exc)
 {
@@ -31,6 +38,13 @@ _Unwind_DeleteException (struct _Unwind_Exception *exc)
     (*exc->exception_cleanup) (_URC_FOREIGN_EXCEPTION_CAUGHT, exc);
 }
 
+_Unwind_Reason_Code
+_Unwind_Resume_or_Rethrow (struct _Unwind_Exception *exc __attribute__ ((__unused__)))
+{
+  __builtin_abort ();
+  return 0;
+}
+
 _Unwind_Reason_Code
 _Unwind_Backtrace(_Unwind_Trace_Fn trace, void * trace_argument)
 {