[Gdal-dev] RE: [Fwd: Getting large file support on cygwin with fseeko/ftello]

[Jonathan Greenberg]

I just want to confirm this works and affirm the need for this: Carlos's mod
does appear to work under cygwin (I was able to compile GDAL successfully
using the small mod) -- Frank, maybe a quick fix is to add a
--with-cygwin-lfs flag or something along those lines to the compilation
options.  All Carlos had to do was change the fseek and ftell calls in the
port/cpl_vsil_unix_stdio_64.cpp to fseeko and ftello.  

Thoughts?

--j

P.S. Anyone at AGU this week?

--

Jonathan A. Greenberg, PhD
NRC Research Associate
NASA Ames Research Center
MS 242-4
Moffett Field, CA 94035-1000
Office: 650-604-5896
Cell: 415-794-5043
AIM: jgrn307
MSN: jgrn307 at hotmail.com

-----Original Message-----
From: Carlos A. Rueda [mailto:carueda at ucdavis.edu] 
Sent: Tuesday, December 06, 2005 11:03 AM
To: Jonathan Greenberg
Subject: [Fwd: Getting large file support on cygwin with fseeko/ftello]



-------- Original Message --------
Subject: Getting large file support on cygwin with fseeko/ftello
Date: Mon, 05 Dec 2005 21:53:48 -0800
From: Carlos A. Rueda <carueda at ucdavis.edu>
CC: Frank Warmerdam <warmerdam at pobox.com>
Newsgroups: gmane.comp.gis.gdal.devel

Frank and all,

Today I verified that if you just make GDAL to call fseeko and ftello
instead of the default fseek and ftell functions in
port/cpl_vsil_unix_stdio_64.cpp, then you will get effective large
file support (LFS) under cygwin.

I'm not sure about how portable are the ftello/fseeko calls, but I was
wondering if you guys can *please* update the build process so LFS
gets appropriately enabled when installing GDAL under cygwin. So far
the trick above is the only way we have been able to get LFS under
cygwin, but certainly we (all) would prefer a cleaner way to
accomplish it!

Many thanks.

Carlos