For PR572:

Undefine the PPC symbol which is defined by Linux/PPC (erroneously) so it
doesn't pollute the user namespace and clash with our namespace declarations.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22202 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/PowerPC/PPCRelocations.h

@@ -16,6 +16,12 @@
 
 #include "llvm/CodeGen/MachineRelocation.h"
 
+// Hack to rid us of a PPC pre-processor symbol which is erroneously 
+// defined in a PowerPC header file (bug in Linux/PPC)
+#ifdef PPC
+#undef PPC
+#endif
+
 namespace llvm {
   namespace PPC {
     enum RelocationType {