Preserve timestamp of symlinks when extracting (if utimensat available)

[tar] / lib / xstrtoul.c

#define __strtol strtoul
#define __strtol_t unsigned long int
#define __xstrtol xstrtoul
#define STRTOL_T_MINIMUM 0
#define STRTOL_T_MAXIMUM ULONG_MAX
#include "xstrtol.c"