diff --git a/extra/llvm/clang/ffi/platforms.txt b/extra/llvm/clang/ffi/platforms.txt
new file mode 100644
index 0000000000..47e0a6946a
--- /dev/null
+++ b/extra/llvm/clang/ffi/platforms.txt
@@ -0,0 +1 @@
+unix
\ No newline at end of file