2007.12.17 15:06 "Re: [Tiff] Large file support in libtiff 3.8.2", by Bob Friesenhahn

I want to compile a program called Enblend on my system. My purpose is to have it blend images of over 300 mega pixels. The author of Enblends says that for that to work, my libtiff must be compiled with large file support.

Is large file support enabled by default, or does the configure script require specific options for large file support to be enabled?

If so, what are they? Couldn't find anything in the documentation with the source code.

Large file support is operating system dependent. Some operating systems don't have special large file support since large files are supported by default. Others require special build options. For Unix type targets, the configure script arranges to build libtiff with large file support by default. For Windows, it seems that the availability of large file support may depend on if you choose the Windows I/O interface or the POSIX I/O interface (I don't know the details).

The TIFF format itself maxes out at 4GB. There is a BigTIFF format supported by the development version of libtiff 4.0 which supports truely huge files but it seems to me that this development version is not completely usable yet since it does not even pass its own basic sanity checks.

Bob
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Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/