Add lto version check mechanism.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45238 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/llvm/LinkTimeOptimizer.h b/include/llvm/LinkTimeOptimizer.h
index 164232d..fe87ae0 100644
--- a/include/llvm/LinkTimeOptimizer.h
+++ b/include/llvm/LinkTimeOptimizer.h
@@ -20,6 +20,8 @@
#include <set>
#include <llvm/ADT/hash_map>
+#define LLVM_LTO_VERSION 1
+
namespace llvm {
class Module;
@@ -148,6 +150,6 @@
/// linker to use dlopen() interface to dynamically load LinkTimeOptimizer.
/// extern "C" helps, because dlopen() interface uses name to find the symbol.
extern "C"
-llvm::LinkTimeOptimizer *createLLVMOptimizer();
+llvm::LinkTimeOptimizer *createLLVMOptimizer(unsigned VERSION = LLVM_LTO_VERSION);
#endif
diff --git a/tools/lto/lto.cpp b/tools/lto/lto.cpp
index e7e00e7..bc75234 100644
--- a/tools/lto/lto.cpp
+++ b/tools/lto/lto.cpp
@@ -45,8 +45,11 @@
using namespace llvm;
extern "C"
-llvm::LinkTimeOptimizer *createLLVMOptimizer()
+llvm::LinkTimeOptimizer *createLLVMOptimizer(unsigned VERSION)
{
+ if (VERSION != LLVM_LTO_VERSION)
+ return NULL;
+
llvm::LTO *l = new llvm::LTO();
return l;
}