[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 1/2] xen{trace/analyze}: don't use 64bit versions of libc functions
El 22/06/15 a les 11.08, George Dunlap ha escrit: > On 06/19/2015 09:58 AM, Roger Pau Monne wrote: >> This is not needed, neither encouraged. Configure already checks >> _FILE_OFFSET_BITS and appends it when needed, so that the right functions >> are used. Also remove the usage of loff_t and O_LARGEFILE for the same >> reason. > > Just so I understand -- are you saying that configure at the tools > directory level will notice that Linux can handle 64-bit file operations > and use them automatically? Yes, according to the man page [1]: "Over time, increases in the size of the stat structure have led to three successive versions of stat(): sys_stat() (slot __NR_oldstat), sys_newstat() (slot __NR_stat), and sys_stat64() (new in kernel 2.4; slot __NR_stat64). The glibc stat() wrapper function hides these details from applications, invoking the most recent version of the system call provided by the kernel, and repacking the returned information if required for old binaries. Similar remarks apply for fstat() and lstat()." Roger. [1] http://linux.die.net/man/2/fstat64 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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