* doc/posix-functions/setvbuf.texi (setvbuf):
Document MS-Windows portability problem with _IOLBF.
2019-06-23 Paul Eggert <eggert@cs.ucla.edu>
+ Document setvbuf _IOLBF problem
+ * doc/posix-functions/setvbuf.texi (setvbuf):
+ Document MS-Windows portability problem with _IOLBF.
+
Document lseek SEEK_DATA/SEEK_HOLE
* doc/posix-functions/lseek.texi (lseek):
Document some systems that do not support SEEK_DATA and SEEK_HOLE.
@item
On Windows platforms (excluding Cygwin), this function does not set @code{errno}
upon failure.
+@item
+On Windows platforms (excluding Cygwin), @code{_IOLBF} (line-buffering)
+is treated as if it were @code{_IOFBF} (full buffering),
+possibly with a warning generated.
@end itemize