Subzero. Native 64-bit int arithmetic on x86-64.

crosstest/test_calling_conv_main.cpp

Index: crosstest/test_calling_conv_main.cpp
diff --git a/crosstest/test_calling_conv_main.cpp b/crosstest/test_calling_conv_main.cpp
index ce5ecda4c42c966bcaa65761fef8f52d164c3d03..f0feef07f3db3a9a51fba47290b10fec3eb478c1 100644
--- a/crosstest/test_calling_conv_main.cpp
+++ b/crosstest/test_calling_conv_main.cpp
@@ -162,7 +162,11 @@ void testCallee(size_t &TotalTests, size_t &Passes, size_t &Failures) {
   }
 }
 
+#ifdef X8664_STACK_HACK
+extern "C" int wrapped_main(int argc, char *argv[]) {
+#else  // !defined(X8664_STACK_HACK)
 int main(int argc, char *argv[]) {
+#endif // X8664_STACK_HACK
   size_t TotalTests = 0;
   size_t Passes = 0;
   size_t Failures = 0;