On Dec 19, 2017, at 8:15 AM, Steven Watanabe via Boost <boost@lists.boost.org<mailto:boost@lists.boost.org>> wrote: AMDG On 12/19/2017 06:05 AM, John Maddock via Boost wrote: Current develop appears not to build with XCode 8.0 causing Travis tests to fail, for example: https://travis-ci.org/boostorg/config/jobs/318188889 It's probably this: https://github.com/boostorg/build/commit/0c6d0165b096b9e026c933194eff4e12468... Does anyone know the correct way to detect whether struct stat has st_mtim (or does it have a different name on OSX?). With macOS Sierra (10.12.6) you get stat.st_mtime like this: #if !defined(__DARWIN_64_BIT_INO_T) struct stat { dev_t st_dev; /* [XSI] ID of device containing file */ ino_t st_ino; /* [XSI] File serial number */ mode_t st_mode; /* [XSI] Mode of file (see below) */ nlink_t st_nlink; /* [XSI] Number of hard links */ uid_t st_uid; /* [XSI] User ID of the file */ gid_t st_gid; /* [XSI] Group ID of the file */ dev_t st_rdev; /* [XSI] Device ID */ #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) struct timespec st_atimespec; /* time of last access */ struct timespec st_mtimespec; /* time of last data modification */ struct timespec st_ctimespec; /* time of last status change */ #else time_t st_atime; /* [XSI] Time of last access */ long st_atimensec; /* nsec of last access */ time_t st_mtime; /* [XSI] Last data modification time */