Fail less mysteriously; inform the user that their LLVM was not built with
libffi support and that the interpreter can't call external functions without
it. Patch by Timo Juhani Lindfors! Fixes PR5466.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89062 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp b/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp
index a620de5..8b4e961 100644
--- a/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp
+++ b/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp
@@ -284,6 +284,9 @@
else
llvm_report_error("Tried to execute an unknown external function: " +
F->getType()->getDescription() + " " +F->getName());
+#ifndef USE_LIBFFI
+ errs() << "Recompiling LLVM with --enable-libffi might help.\n";
+#endif
return GenericValue();
}