who has two different incompatible copies of zlib installed:
(in /usr and in /usr/local).
cmake errorneously chose *.h file from /usr/local/include,
while zlib.a/zlib.so from /usr/lib/. Compilation failed
because of a missing symbol gzopen64.
modified:
@ cmake/zlib.cmake
Removing the line (as suggested by Vlad) which made cmake choose
the wrong library.
Note: this line used to be a hack for old HP machines,
it's not needed anymore.
5fb0d16016