On 01/25/2017 10:24 AM, Zack Weinberg wrote:
The ChangeLog entry for the addition says "Import AC_SYS_LARGEFILE
from largefile.m4 serial 12", so that sounds like there was an add-on
.m4 file with the same functionality floating around prior to that - I
don't know where to find copies of that file.
It's from gnulib, which in turn got it from coreutils.
Gnulib still has m4/largefile.m4, although now it's merely a copy of
what's in (the next version of) Autoconf. That is, people use the Gnulib
largefile.m4 because they don't want to wait for the next release of
Autoconf to come out.
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