fix compilation for llvm 10.0
@@ -262,7 +262,8 @@ class ModuleSanitizerCoverageLegacyPass : public ModulePass {
} // namespace
-#if 1
+#if LLVM_VERSION_MAJOR >= 11 /* use new pass manager */
+
extern "C" ::llvm::PassPluginLibraryInfo LLVM_ATTRIBUTE_WEAK
llvmGetPassPluginInfo() {
