[Octave-bug-tracker] [bug #57644] fseek fread fail for files >4GB 5.1.0 on Windows10 64-bit x64 proc

[Markus Mützel]

Follow-up Comment #2, bug #57644 (project octave):

"fseek" uses the gnulib wrapper for fseeko [1]. That page references
"AC_SYS_LARGEFILE":
> On platforms where off_t is a 32-bit type, fseeko does not work correctly
with files larger than 2 GB. (Cf. AC_SYS_LARGEFILE.)

I don't find any reference to AC_SYS_LARGEFILE [2] in the Octave sources.
I don't know if off_t is a 32-bit type on cygwin. But maybe we could use that
macro to enable fseeking in large files on affected systems.

[1]: https://www.gnu.org/software/gnulib/manual/html_node/fseeko.html
[2]:
https://www.gnu.org/software/autoconf/manual/autoconf-2.67/html_node/System-Services.html

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