C library: add __time64

This is used in glibc to facilitate a transition to 64-bit time_t.

Author: tautschnig

src/ansi-c/library/time.c

@@ -8,8 +8,23 @@
 #undef time
 
 time_t __VERIFIER_nondet_time_t(void);
+time_t __time64(time_t *);
 
 time_t time(time_t *tloc)
+{
+  return __time64(tloc);
+}
+
+/* FUNCTION: __time64 */
+
+#ifndef __CPROVER_TIME_H_INCLUDED
+#  include <time.h>
+#  define __CPROVER_TIME_H_INCLUDED
+#endif
+
+time_t __VERIFIER_nondet_time_t(void);
+
+time_t __time64(time_t *tloc)
 {
   time_t res=__VERIFIER_nondet_time_t();
   if(tloc)

src/ansi-c/library_check.sh

@@ -63,6 +63,7 @@ perl -p -i -e 's/^__fprintf_chk\n//' __functions # fprintf-01/__fprintf_chk.desc
 perl -p -i -e 's/^__fread_chk\n//' __functions # fread-01/__fread_chk.desc
 perl -p -i -e 's/^__printf_chk\n//' __functions # printf-01/__printf_chk.desc
 perl -p -i -e 's/^__syslog_chk\n//' __functions # syslog-01/__syslog_chk.desc
+perl -p -i -e 's/^__time64\n//' __functions # time
 perl -p -i -e 's/^__vfprintf_chk\n//' __functions # vfprintf-01/__vfprintf_chk.desc
 
 # Some functions are covered by tests in other folders: