Keep absl API available in the shared library

Author: slabko

clickhouse/CMakeLists.txt

@@ -109,6 +109,17 @@ SET_TARGET_PROPERTIES (clickhouse-cpp-lib
     LINKER_LANGUAGE CXX
     VERSION ${CLICKHOUSE_CPP_VERSION}
 )
+
+IF (BUILD_SHARED_LIBS AND NOT WITH_SYSTEM_ABSEIL)
+    GET_TARGET_PROPERTY(absl_orignal_lib absl::int128 ALIASED_TARGET)
+    SET_PROPERTY (TARGET ${absl_orignal_lib} PROPERTY POSITION_INDEPENDENT_CODE ON)
+    TARGET_LINK_LIBRARIES (clickhouse-cpp-lib
+        -Wl,--whole-archive
+        absl::int128
+        -Wl,--no-whole-archive
+    )
+ENDIF()
+
 TARGET_LINK_LIBRARIES (clickhouse-cpp-lib
     absl::int128
     cityhash::cityhash