build: remove boost_system linkage for boost 1.89+

In boost 1.89, the stub compiled library for Boost.System was removed.
According to the boost 1.89 release notes: "The stub compiled library
has been removed; System has been header-only since release 1.69."
See https://www.boost.org/releases/1.89.0/ .

This change removes boost_system from target_link_libraries() calls
where other boost libraries are already linked. When linking against
other boost components (such as boost_thread, boost_date_time, or
boost_filesystem), the header-only System library dependency is
automatically satisfied, making explicit linkage against the (now
non-existent) compiled boost_system library unnecessary.

This is not a breaking change since the minimum required boost version
for this project is 1.87, where Boost.System was already header-only.

Signed-off-by: Kefu Chai <k.chai@proxmox.com>

Author: tchaikov

example/CMakeLists.txt

@@ -7,10 +7,10 @@ if(Arrow_FOUND)
   message( "arrow is installed")
   add_executable(csv_to_parquet csv_to_parquet.cpp)
   target_include_directories(csv_to_parquet PUBLIC ../include)
-  target_link_libraries(s3select_example boost_date_time boost_system boost_thread parquet arrow boost_filesystem)
-  target_link_libraries(csv_to_parquet boost_date_time boost_system boost_thread parquet arrow)
+  target_link_libraries(s3select_example boost_date_time boost_thread parquet arrow boost_filesystem)
+  target_link_libraries(csv_to_parquet boost_date_time boost_thread parquet arrow)
 else()
-  target_link_libraries(s3select_example boost_date_time boost_system boost_thread boost_filesystem)
+  target_link_libraries(s3select_example boost_date_time boost_thread boost_filesystem)
 endif()
 
 add_executable(generate_rand_csv generate_rand_csv.c)

test/CMakeLists.txt

@@ -11,13 +11,13 @@ find_package(Arrow QUIET)
 
 if(Arrow_FOUND)
   message( "arrow is installed")
-  target_link_libraries(s3select_test gtest gtest_main boost_date_time boost_thread boost_system parquet arrow pthread )
-  target_link_libraries(s3select_perf_test gtest gtest_main boost_date_time boost_thread boost_system parquet arrow pthread profiler)
-  target_link_libraries(s3select_test_json_parser gtest gtest_main boost_date_time boost_thread boost_system parquet arrow pthread )
+  target_link_libraries(s3select_test gtest gtest_main boost_date_time boost_thread parquet arrow pthread )
+  target_link_libraries(s3select_perf_test gtest gtest_main boost_date_time boost_thread parquet arrow pthread profiler)
+  target_link_libraries(s3select_test_json_parser gtest gtest_main boost_date_time boost_thread parquet arrow pthread )
 else()
-  target_link_libraries(s3select_test gtest gtest_main boost_date_time boost_thread boost_system pthread )
-  target_link_libraries(s3select_perf_test gtest gtest_main boost_date_time boost_thread boost_system pthread profiler)
-  target_link_libraries(s3select_test_json_parser gtest gtest_main boost_date_time boost_thread boost_system pthread )
+  target_link_libraries(s3select_test gtest gtest_main boost_date_time boost_thread pthread )
+  target_link_libraries(s3select_perf_test gtest gtest_main boost_date_time boost_thread pthread profiler)
+  target_link_libraries(s3select_test_json_parser gtest gtest_main boost_date_time boost_thread pthread )
 endif()
 
 include(GoogleTest)