--- llvm-9999/lib/Target/PowerPC/PPCJITInfo.cpp.orig	2012-04-03 13:04:40.105982680 +0900
+++ llvm-9999/lib/Target/PowerPC/PPCJITInfo.cpp	2012-04-03 13:06:30.431122638 +0900
@@ -291,9 +291,10 @@
 }
 #endif
 
-extern "C" void *PPCCompilationCallbackC(unsigned *StubCallAddrPlus4,
-                                         unsigned *OrigCallAddrPlus4,
-                                         bool is64Bit) {
+extern "C" {
+static void* LLVM_ATTRIBUTE_USED PPCCompilationCallbackC(unsigned *StubCallAddrPlus4,
+                                                         unsigned *OrigCallAddrPlus4,
+                                                         bool is64Bit) {
   // Adjust the pointer to the address of the call instruction in the stub
   // emitted by emitFunctionStub, rather than the instruction after it.
   unsigned *StubCallAddr = StubCallAddrPlus4 - 1;
@@ -337,6 +338,7 @@
   // stack after we restore all regs.
   return Target;
 }
+}