ClickHouse/utils/zookeeper-dump-tree/CMakeLists.txt

clickhouse_add_executable (zookeeper-dump-tree main.cpp ${SRCS})
target_link_libraries(zookeeper-dump-tree PRIVATE clickhouse_common_zookeeper_no_log clickhouse_common_io boost::program_options)
Prefix overridden add_executable() command with "clickhouse_" 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/ 2022-07-11 17:19:15 +00:00			`clickhouse_add_executable (zookeeper-dump-tree main.cpp ${SRCS})`
Introduce clickhouse_common_zookeeper_no_log (w/o extra deps for examples) Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com> 2022-01-11 20:51:41 +00:00			`target_link_libraries(zookeeper-dump-tree PRIVATE clickhouse_common_zookeeper_no_log clickhouse_common_io boost::program_options)`