This is broken since 1f461ac45b, where
Z_PREFIX was defined to namespace the bundled zlib symbols. The
bundled zlib is used by bootstrap.pro when cross-compiling which uses
the namespaced symbols. This breaks linking of rcc when --system-zlib
is used, as it will try to link to compress2 instead of z_compress2.
To fix this, the aliases are pulled in via zconf.h and the bundled
zlib is prepended to the INCLUDEPATH (i.e. before the system zlib).
Change-Id: Iec76cbdead40f888e2ac6a887ec8f3b7bc7db501
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
da6a706eb3