A simple HelloWorld program with zero includes except iostream triggers
a build of ca. 2000 source files. The reason is that ClickHouse's
top-level CMakeLists.txt overrides "add_executable()" to link all
binaries against "clickhouse_new_delete". This links against
"clickhouse_common_io", which in turn has lots of 3rd party library
dependencies ... Without linking "clickhouse_new_delete", the number of
compiled files for "HelloWorld" goes down to ca. 70.
As an example, the self-extracting-executable needs none of its current
dependencies but other programs may also benefit.
In order to restore access to the original "add_executable()", the
overriding version is now prefixed. There is precedence for a
"clickhouse_" prefix (as opposed to "ch_"), for example
"clickhouse_split_debug_symbols". In general prefixing makes sense also
because overriding CMake commands relies on undocumented behavior and is
considered not-so-great practice (*).
(*) https://crascit.com/2018/09/14/do-not-redefine-cmake-commands/
* Fix shared build
* Major default libs refactor
* Fix build with gcc_eh
* Link all libraries as a big group.
* Use global interface library as a group
* Build capnproto using our cmake
* Use only internal libunwind
* Make separate libs Common/ZooKeeper and Common/ConfigProcessor
renamed: dbms/src/Common/StringUtils.h -> dbms/src/Common/StringUtils/StringUtils.h
* Fix space
* Fix data in system.build_options
* merge
* merge
* Travis optimize
* optimize
* Fix clickhouse-test --no-long
* no long
* Split too long test
* Better tests
* missing file
* Fix includes
* Added draft [#CLICKHOUSE-2].
* fix
* fix
* fix
* Fix test 281 under asan
