tell the linker that we want NX stack if possible

code/unix/qasm.h

@@ -28,6 +28,10 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 #undef ELF
 #endif
 
+#ifdef __ELF__
+.section .note.GNU-stack,"",@progbits
+#endif
+
 #ifdef ELF
 #define C(label) label
 #else