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    1: READ THIS BEFORE TRYING TO DYNAMICALLY LINK RSYNC AND ZLIB!
    2: 
    3: zlib has been adapted slightly for use in rsync. Please don't bother
    4: the zlib authors with problems related to the use of zlib in rsync as
    5: any bugs are likely to be our fault and not theirs.
    6: 
    7: Specific changes that have been made to zlib for rsync include:
    8: 
    9: - add Z_INSERT_ONLY to allow for efficient history updating without
   10:   actually emitting any data. This is used to compress the matched
   11:   blocks that don't cross the wire, which gives better compression
   12:   ratios on the literal data.
   13: 
   14: - fixed a number of minor compilation issues. (redefinition of MAX and
   15:   other such trivial things)
   16: 
   17: - include rsync.h to ensure that we get a consistent set of includes
   18:   for all C code in rsync and to take advantage of autoconf
   19: 
   20: As a result of the first item, the streams from rsync's version of
   21: zlib are *not compatible* with those produced by the upstream version
   22: of rsync.  In other words, if you link rsync against your system's
   23: copy, it will not be able to interoperate with any other version if
   24: the -z option is used.  (Sorry.  Sometimes standard is better than
   25: better.)
   26: 
   27: The rsync maintainers hope to fix this problem in the future by either
   28: merging our changes into the upstream version, or backing them out of
   29: rsync in a way that preserves wire compatibility.  But in the meantime
   30: this version must be maintained in parallel.
   31: