[gdal-dev] gdal / ESRI SDE / mapserver

[Russell McOrmond]

   As many of you likely already know (and I just found out), there are 
incompatabilities between ESRI's libsde and the zlib library that many 
tools we use need.   I can stop the various core dumps by compiling and 
making available the same version of zlib that is inside libsde (which for 
ArcSDE 9.2sp5 is zlib 1.1.3).

Notes about the bug here: 
http://forums.esri.com/Thread.asp?c=2&f=1718&t=212867


   Gdal has an internal version of zlib, used when the otherwise provided 
zlib doesn't have all the functionality needed.  The current configure 
script includes the include path provided by ./configure command line 
parameters before this local zlib directory.  This means the wrong zlib.h 
gets include and the compile complains on the missing function 
inflateCopy().

   Is it possible for this order to be patched up, or a ./configure line 
parameter created?  What I am doing currently is renaming the zconf.h and 
zlib.h out of the way for the build of gdal, renaming back after.

   I am wondering.  Given gdal includes this functionality, I'm wondering 
if it is possible to export this functionality.  Mapserver needs these 
functions, and could also be configured to use the gdal version rather 
than the one provided by zlib.  This might avoid the compatability 
problems with libsde and zlib -- at least for mapserver and other tools 
which are built upon gdal.

Thank you.

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