should be it

external/duckdb/test/api/capi/CMakeLists.txt

@@ -0,0 +1,32 @@
+add_library_unity(
+  test_sql_capi
+  OBJECT
+  capi_aggregate_functions.cpp
+  capi_custom_type.cpp
+  capi_file_system.cpp
+  capi_scalar_functions.cpp
+  capi_table_functions.cpp
+  test_capi.cpp
+  test_capi_any_invalid_type.cpp
+  test_capi_append_data_chunk.cpp
+  test_starting_database.cpp
+  test_capi_appender.cpp
+  test_capi_arrow.cpp
+  test_capi_data_chunk.cpp
+  test_capi_extract.cpp
+  test_capi_instance_cache.cpp
+  test_capi_pending.cpp
+  test_capi_prepared.cpp
+  test_capi_profiling.cpp
+  test_capi_website.cpp
+  test_capi_complex_types.cpp
+  test_capi_to_decimal.cpp
+  test_capi_values.cpp
+  test_capi_vector.cpp
+  test_capi_replacement_scan.cpp
+  test_capi_streaming.cpp
+  test_capi_table_description.cpp
+  test_without_disabled_functions.cpp)
+set(ALL_OBJECT_FILES
+    ${ALL_OBJECT_FILES} $<TARGET_OBJECTS:test_sql_capi>
+    PARENT_SCOPE)