MySQL source distribution contains sources for zlib (compression library), yaSSL (ssl library), libedit, and (in MySQL 5.5 only) readline. MySQL can be compiled using either libraries available on the system or, to minimize external dependencies, with bundled sources. For Unix/Linux packagers, using system libraries is a more natural option and CMake has support for that, using the following options:
-DWITH_ZLIB=system(link with systemlibz.so)-DWITH_SSL=system(link with systemlibssl.so,libcrypto.so)-DWITH_EDITLINE=system(link with systemlibedit.so)-DWITH_READLINE=system(link with systemlibreadline.so; MySQL 5.5 only)
On Linux, --Wl,--as-needed link options can
also be used to remove unused dependencies. Although the CMake
build tries to avoid unneeded dependencies,
--as-needed produces better results. For
example, it removes unused dependencies on
libgcc_s.so.
--Wl,--no-undefined
cannot be used at the moment if plugins
are built because plugins have direct dependency (use symbols)
exported by MySQL server.