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Update checks for new stat fields.

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This uses the macros as defined by the man page, which, as noted in the
comments, are defined correctly on as many libc's that I could check.
This commit is contained in:
Elliott Sales de Andrade 2017-06-30 23:55:09 -04:00
parent bf4fb03e4b
commit d2bf82fef0
1 changed files with 6 additions and 4 deletions
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10
src/disk_interface.cc
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@ -194,12 +194,14 @@ TimeStamp RealDiskInterface::Stat(const string& path, string* err) const {
#if defined(__APPLE__) && !defined(_POSIX_C_SOURCE)
return ((int64_t)st.st_mtimespec.tv_sec * 1000000000LL +
st.st_mtimespec.tv_nsec);
#elif defined(_LARGEFILE64_SOURCE)
#elif (_POSIX_C_SOURCE >= 200809L || _XOPEN_SOURCE >= 700 || defined(_BSD_SOURCE) || defined(_SVID_SOURCE) || \
defined(__BIONIC__))
// For glibc, see "Timestamp files" in the Notes of http://www.kernel.org/doc/man-pages/online/pages/man2/stat.2.html
// newlib, uClibc and musl follow the kernel (or Cygwin) headers and define the right macro values above.
// For bsd, see https://github.com/freebsd/freebsd/blob/master/sys/sys/stat.h and similar
// For bionic, C and POSIX API is always enabled.
return (int64_t)st.st_mtim.tv_sec * 1000000000LL + st.st_mtim.tv_nsec;
#elif defined(__CYGWIN__)
return (int64_t)st.st_mtime * 1000000000LL;
#else
// see http://www.kernel.org/doc/man-pages/online/pages/man2/stat.2.html
return (int64_t)st.st_mtime * 1000000000LL + st.st_mtimensec;
#endif
#endif