Correction for the fix for Bug 3508 - Persistent storage support breaks Linux compatibility.
A 2nd `make install' will fail attempting to create symlink libnvmemmory.so already created by 1st install.
Install should pre-emptively delete it.
#include <unistd.h>
#define STRINGIFY(x) #x
#define TOSTRING(x) STRINGIFY(x)
#define CURRENT_LOCATION __FILE__ ":" TOSTRING(__LINE__)
#define err() \
{ \
_fail("at " CURRENT_LOCATION " "); \
}
#define mb() asm volatile ("" : : : "memory")
extern void pass(void);
extern void _fail(char *reason);