Not gnereate binding for variadic function with ms_abi

rustc fail to compile variadic function with ms_abi:
error[E0045]: variadic function must have C or cdecl calling convention

As suggested in issue, this short term fix: not generate binding
and emit a warning.

Fixes #997

1 files changed, 4 insertions, 0 deletions

diff --git a/tests/headers/abi_variadic_function.hpp b/tests/headers/abi_variadic_function.hpp
new file mode 100644
index 00000000..2141535c
--- /dev/null
+++ b/tests/headers/abi_variadic_function.hpp
@@ -0,0 +1,4 @@
+// bindgen-flags: -- -std=c++11
+
+char __attribute__((ms_abi)) a(char, ...);
+char b(char, ...);