2009.10.07 20:40 "Re: [Tiff] Wrong Native Bit Order on Intel x86_64", by Edward Lam

In the tiff-4.0 source code, I traced the problem to line 16124 of the configure script (or line 327 of configure.ac), where the script

>> checks for i*86* instead of i*86*|x86_64. Unless there is a good

reason for the native bit order to be MSB-to-LSB on x86_64, I believe that this is a bug and needs to be corrected so that all Intel and AMD x86 varieties are properly identified as LSB-to-MSB architectures.

This issue is now fixed in libtiff CVS.

Hopefully someone will speak up if this was the wrong decision.

I doubt it's the wrong decision since we're just being consistent on x86_64 with 32-bit x86 on this matter. If we're wrong here, then that means the original decision on 32-bit x86 was wrong as well. :)

Having said that, it would be nice if we had a regression test of some sort that would actually test this decision. ie. that libtiff will correctly read .tiff files generated with both fill orders.

Regards,

-Edward