bug#18750: --line-buffered option doesn't work with --files-with-matches

[Norihiro Tanaka]

Jim Meyering <address@hidden> wrote:
> Thanks, but as a stand-alone patch, that makes grep fail to compile,
> because there is one remaining use of the variable whose declaration
> is removed.

Sorry, I fixed it, and compiled and tested.

> In any case, there is some ambiguity in the documentation
> about what "line" buffering means with -Z. With -l and -Z, should
> grep --line-buffered flush after printing each <file_name, NUL> pair?
> That's what I'd expect.

I interprete the means as line buffered option `_IOLBF' of setvbuf, and
I think that many users will expect the behavior.  However, different
interpretations might also be present.

0001-grep-line-buffered-for-output-of-file-names-in-grep-.patch
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