Provide InitializeAllTargets and InitializeNativeTarget functions in the

C bindings.  Change all the backend "Initialize" functions to have C linkage.
Change the "llvm/Config/Targets.def" header to use C-style comments to avoid
compile warnings.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74026 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/CBackend/CBackend.cpp

@@ -59,10 +59,8 @@ int CBackendTargetMachineModule = 0;
 // Register the target.
 static RegisterTarget<CTargetMachine> X("c", "C backend");
 
-// Force static initialization when called from llvm/InitializeAllTargets.h
-namespace llvm {
-  void InitializeCBackendTarget() { }
-}
+// Force static initialization.
+extern "C" void LLVMInitializeCBackendTarget() { }
 
 namespace {
   /// CBackendNameAllUsedStructsAndMergeFunctions - This pass inserts names for