duckdb-python/CMakeLists.txt at main · ukclivecox/duckdb-python · GitHub

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cmake_minimum_required(VERSION 3.29)

project(duckdb_py LANGUAGES CXX)

# Always use C++11
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>")

# Set the library name
set(DUCKDB_PYTHON_LIB_NAME "_duckdb")

# Detect CCache
include(cmake/compiler_launcher.cmake)
setup_compiler_launcher_if_available()

# ────────────────────────────────────────────
# IDE support
# ────────────────────────────────────────────
# Create compile_commands.json for IntelliSense and clang-tidy
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

# ────────────────────────────────────────────
# Policy hygiene
# ────────────────────────────────────────────
if(POLICY CMP0148) # Disallow FindPythonLibs
  cmake_policy(SET CMP0148 NEW)
endif()

if(POLICY CMP0003) # No implicit link directories
  cmake_policy(SET CMP0003 NEW)
endif()

# ────────────────────────────────────────────
# Dependencies
# ────────────────────────────────────────────
# PyBind11
find_package(pybind11 REQUIRED CONFIG)

# DuckDB
include(cmake/duckdb_loader.cmake)
if(CMAKE_BUILD_TYPE STREQUAL "Debug")
  duckdb_configure_for_debug()
else()
  duckdb_configure_for_release()
endif()
duckdb_add_library(duckdb_target)

# Bundle in INTERFACE library
add_library(_duckdb_dependencies INTERFACE)
target_link_libraries(_duckdb_dependencies INTERFACE pybind11::pybind11
                                                     duckdb_target)
# Also add include directory
target_include_directories(
  _duckdb_dependencies
  INTERFACE $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src/duckdb_py/include>
)

# ────────────────────────────────────────────
# Descend into the real DuckDB‑Python sources
# ────────────────────────────────────────────
add_subdirectory(src/duckdb_py)

pybind11_add_module(
  _duckdb
  $<TARGET_OBJECTS:python_src>
  $<TARGET_OBJECTS:python_arrow>
  $<TARGET_OBJECTS:python_common>
  $<TARGET_OBJECTS:python_functional>
  $<TARGET_OBJECTS:python_jupyter>
  $<TARGET_OBJECTS:python_native>
  $<TARGET_OBJECTS:python_numpy>
  $<TARGET_OBJECTS:python_pandas>
  $<TARGET_OBJECTS:python_pybind11>
  $<TARGET_OBJECTS:python_connection>
  $<TARGET_OBJECTS:python_expression>
  $<TARGET_OBJECTS:python_relation>
  $<TARGET_OBJECTS:python_type>)
# add _duckdb_dependencies
target_link_libraries(_duckdb PRIVATE _duckdb_dependencies)
duckdb_link_extensions(_duckdb)

# ────────────────────────────────────────────
# Controlling symbol export
#
# We want to export exactly two symbols: - PyInit__duckdb: this allows CPython
# to load the module - duckdb_adbc_init: the DuckDB ADBC driver
#
# The export of symbols on OSX and Linux is controlled by: - Visibility
# annotations in the code (for this lib we use the PYBIND11_EXPORT macro) -
# Telling the linker which symbols we want exported, which we do below
#
# For Windows, we rely on just the visbility annotations.
# ────────────────────────────────────────────
set_target_properties(
  _duckdb
  PROPERTIES CXX_VISIBILITY_PRESET hidden
             C_VISIBILITY_PRESET hidden
             VISIBILITY_INLINES_HIDDEN ON)

if(APPLE)
  target_link_options(
    _duckdb PRIVATE "LINKER:-exported_symbol,_duckdb_adbc_init"
    "LINKER:-exported_symbol,_PyInit__duckdb")
elseif(UNIX AND NOT APPLE)
  target_link_options(
    _duckdb PRIVATE "LINKER:--export-dynamic-symbol=duckdb_adbc_init"
    "LINKER:--export-dynamic-symbol=PyInit__duckdb")
elseif(WIN32)
  target_link_options(_duckdb PRIVATE "/EXPORT:duckdb_adbc_init"
                      "/EXPORT:PyInit__duckdb")
endif()

# ────────────────────────────────────────────
# Put the object file in the correct place
# ────────────────────────────────────────────

# If we're not building through scikit-build-core then we have to set a
# different dest dir
include(GNUInstallDirs)
if(DEFINED SKBUILD_PLATLIB_DIR)
  set(_DUCKDB_PY_INSTALL_DIR "${SKBUILD_PLATLIB_DIR}")
elseif(DEFINED Python_SITEARCH)
  set(_DUCKDB_PY_INSTALL_DIR "${Python_SITEARCH}")
else()
  message(
    WARNING
      "Could not determine Python install dir. Falling back to CMAKE_INSTALL_LIBDIR."
  )
  set(_DUCKDB_PY_INSTALL_DIR "${CMAKE_INSTALL_LIBDIR}")
endif()

install(TARGETS _duckdb LIBRARY DESTINATION "${_DUCKDB_PY_INSTALL_DIR}")