necessary info

[John B Brown]

Dear Folk,

	More confusion.

	I've done a 'locate libTIFF' and 'locate libtiff'. There are three 
libTIFFs, one under 10.6 SDK, another under 10.5 SDK, and the third at 
/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ImageIO.framework/Versions/A/Resources/libTIFF.dylib. 


	The only libtiff finds are "libtiff_copyright.txt", 
libtiff-lzw-1.3.tar.gz, libtifftcl3.8.2.dylib, and 
/Users/jbb/google-earth/libtiff.so.3 so there can be no conflictiing 
library path problems. The error is an Apple built-in version error!

	My updatedb path is "/" so locate gets it all.

On 4/28/10 1:14 PM, Landon J Fuller wrote:
>
> On Apr 28, 2010, at 11:46 AM, John B Brown wrote:
>
>> dyld: Library not loaded: /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ImageIO.framework/Versions/A/Resources/libTIFF.dylib
>>   Referenced from: /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ImageIO.framework/Versions/A/ImageIO
>>   Reason: Incompatible library version: ImageIO requires version 1.0.0 or later, but libTIFF.dylib provides version 0.0.0
>>
>> 	I've seen that error message before, during compiles that try to link libTIFF.dylib from the Apple default location. How do I overcome poorly integrated Apple libraries?
>
> This is likely due to your setting of DYLD_LIBRARY_PATH, which overrides dyld's standard behavior. Apple's dynamic linker supports linking multiple libraries with the same basename (eg, libtiff.dylib) by encoding either a binary-relative or absolute path to the linked library. The 'DYNAMIC LIBRARY LOADING' section of dyld(1) has a very brief introduction on how this works.
>
> With DYLD_LIBRARY_PATH set, dyld will instead first perform a simple search across the user-specified search paths, and any conflicting-named libraries found in the search path will take precedence over the intended libraries. If you have a libtiff.dylib in that search path, it will take precedence over the intended library in ImageIO.
>
> To fix the issue, libraries that require DYLD_* environmental variables should be reconfigured/rebuilt to include proper install name paths (see ld(1) -install_name). As a work-around, using DYLD_FALLBACK_LIBRARY_PATH instead may resolve some conflicts.
>
> -landonf




	Shalom,

	John B. Brown.
	[jbb at vcn.com]
	358 High Street,
	Buffalo, Wyoming
	82834

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