Fix a subtle bug where OCaml/C function stack are not aligned on a 16 byte

[SXSI/xpathcomp.git] / src / common_stub.hpp

diff --git a/src/common_stub.hpp b/src/common_stub.hpp
index 45aa0ca..b771f33 100644 (file)
--- a/src/common_stub.hpp
+++ b/src/common_stub.hpp
@@ -18,6 +18,10 @@ extern "C" {
 
 #define NoAlloc
 
+//Must be used in front of every function that is called from OCaml.
+
+#define ML_BINDING extern "C" __attribute__ ((force_align_arg_pointer)) 
+
 
 void register_custom_(char* name,
                      size_t size,
@@ -58,8 +62,7 @@ sxsi_alloc_custom(void (*finalize)(value) = sxsi_finalize_custom<X>)
 
 void sxsi_raise_msg(const char * msg);
 
-extern "C" value sxsi_cpp_init(value unit);
-
+ML_BINDING value sxsi_cpp_init(value unit);
 
 
 #endif