CMakeLists.txt

cmake_minimum_required(VERSION 3.15...3.27)

project(pyoptinterface)

set(CMAKE_CXX_STANDARD 20)
# Linux: -fPIC
set(CMAKE_POSITION_INDEPENDENT_CODE ON)

# we need to ensure all shared libraries can look up its own directory to load other shared libraries
# this is very important for CppAD users because we extract its thread_alloc as a shared library
function(set_rpath target)
    if(APPLE)
        set(CMAKE_MACOSX_RPATH 1)
        set_target_properties(${target} PROPERTIES INSTALL_RPATH "@loader_path")
    elseif(UNIX)
        set_target_properties(${target} PROPERTIES INSTALL_RPATH "$ORIGIN")
    elseif(WIN32)
    endif()
endfunction()

if(MSVC)
    # Add /MP flag for multi-processor compilation
    add_compile_options(/MP)
    add_compile_options(/utf-8)
    if(CMAKE_SYSTEM_PROCESSOR MATCHES "AMD64")
        # use AVX2
        add_compile_options(/arch:AVX2)
    endif()
endif()

if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
    if(CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64")
        # add_compile_options(-march=haswell)
    endif()
endif()

add_subdirectory(thirdparty/fmt)
add_subdirectory(thirdparty/cppad)

set(POI_INSTALL_DIR ${SKBUILD_PLATLIB_DIR}/pyoptinterface/_src)

add_library(core STATIC)
target_sources(core PRIVATE
  include/pyoptinterface/core.hpp
  include/pyoptinterface/container.hpp
  include/pyoptinterface/dylib.hpp
  include/pyoptinterface/solver_common.hpp
  lib/core.cpp
)
target_include_directories(core PUBLIC include thirdparty)
target_link_libraries(core PUBLIC fmt)

add_library(nlexpr STATIC)
target_sources(nlexpr PRIVATE
  include/pyoptinterface/nlexpr.hpp
  lib/nlexpr.cpp
)
target_include_directories(nlexpr PUBLIC include thirdparty)
target_link_libraries(nlexpr PUBLIC core)

add_library(nleval STATIC)
target_sources(nleval PRIVATE
  include/pyoptinterface/nleval.hpp
  lib/nleval.cpp
)
target_link_libraries(nleval PUBLIC core)

add_library(cppad_interface STATIC)
target_sources(cppad_interface PRIVATE
  include/pyoptinterface/cppad_interface.hpp
  lib/cppad_interface.cpp
)
target_include_directories(cppad_interface PUBLIC include thirdparty)
target_link_libraries(cppad_interface PUBLIC nlexpr cppad)

add_library(tcc_interface STATIC)
target_sources(tcc_interface PRIVATE
  include/pyoptinterface/tcc_interface.hpp
  lib/tcc_interface.cpp
)
target_include_directories(tcc_interface PUBLIC include thirdparty)
target_link_libraries(tcc_interface PUBLIC fmt)

# Build Python extensions
find_package(Python ${PYTHON_VERSION}
  REQUIRED COMPONENTS Interpreter Development.Module
  OPTIONAL_COMPONENTS Development.SABIModule)

# Import nanobind through CMake's find_package mechanism
find_package(nanobind CONFIG REQUIRED)

nanobind_add_module(
  core_ext

  STABLE_ABI NB_STATIC NB_DOMAIN pyoptinterface

  lib/core_ext.cpp
)
target_link_libraries(core_ext PUBLIC core)
install(TARGETS core_ext LIBRARY DESTINATION ${POI_INSTALL_DIR})

nanobind_add_module(
  nlexpr_ext

  STABLE_ABI NB_STATIC NB_DOMAIN pyoptinterface

  lib/nlexpr_ext.cpp
)
target_link_libraries(nlexpr_ext PUBLIC nlexpr)
install(TARGETS nlexpr_ext LIBRARY DESTINATION ${POI_INSTALL_DIR})

nanobind_add_module(
  nleval_ext

  STABLE_ABI NB_STATIC NB_DOMAIN pyoptinterface

  lib/nleval_ext.cpp
)
target_link_libraries(nleval_ext PUBLIC nleval)
install(TARGETS nleval_ext LIBRARY DESTINATION ${POI_INSTALL_DIR})

nanobind_add_module(
  cppad_interface_ext

  STABLE_ABI NB_STATIC NB_DOMAIN pyoptinterface

  lib/cppad_interface_ext.cpp
)
target_link_libraries(cppad_interface_ext PUBLIC cppad_interface)
install(TARGETS cppad_interface_ext LIBRARY DESTINATION ${POI_INSTALL_DIR})

nanobind_add_module(
  tcc_interface_ext

  STABLE_ABI NB_STATIC NB_DOMAIN pyoptinterface

  lib/tcc_interface_ext.cpp
)
target_link_libraries(tcc_interface_ext PUBLIC tcc_interface)
install(TARGETS tcc_interface_ext LIBRARY DESTINATION ${POI_INSTALL_DIR})

# Solvers

# Gurobi
add_library(gurobi_model STATIC)
target_sources(gurobi_model PRIVATE
  include/pyoptinterface/gurobi_model.hpp
  lib/gurobi_model.cpp
)
target_link_libraries(gurobi_model PUBLIC core nlexpr)

nanobind_add_module(
  gurobi_model_ext

  STABLE_ABI NB_STATIC NB_DOMAIN pyoptinterface

  lib/gurobi_model_ext.cpp
  lib/gurobi_model_ext_constants.cpp
)
target_link_libraries(gurobi_model_ext PUBLIC gurobi_model)
install(TARGETS gurobi_model_ext LIBRARY DESTINATION ${POI_INSTALL_DIR})

# COPT
add_library(copt_model STATIC)
target_sources(copt_model PRIVATE
  include/pyoptinterface/copt_model.hpp
  lib/copt_model.cpp
)
target_link_libraries(copt_model PUBLIC core nlexpr)

nanobind_add_module(
  copt_model_ext

  STABLE_ABI NB_STATIC NB_DOMAIN pyoptinterface

  lib/copt_model_ext.cpp
  lib/copt_model_ext_constants.cpp
)
target_link_libraries(copt_model_ext PUBLIC copt_model)
install(TARGETS copt_model_ext LIBRARY DESTINATION ${POI_INSTALL_DIR})

# MOSEK
add_library(mosek_model STATIC)
target_sources(mosek_model PRIVATE
  include/pyoptinterface/mosek_model.hpp
  lib/mosek_model.cpp
)
target_link_libraries(mosek_model PUBLIC core)

nanobind_add_module(
  mosek_model_ext

  STABLE_ABI NB_STATIC NB_DOMAIN pyoptinterface

  lib/mosek_model_ext.cpp
  lib/mosek_model_ext_constants.cpp
)
target_link_libraries(mosek_model_ext PUBLIC mosek_model)
install(TARGETS mosek_model_ext LIBRARY DESTINATION ${POI_INSTALL_DIR})

# HiGHS
add_library(highs_model STATIC)
target_sources(highs_model PRIVATE
  include/pyoptinterface/highs_model.hpp
  lib/highs_model.cpp
)
target_include_directories(highs_model PUBLIC thirdparty/solvers/highs)
target_link_libraries(highs_model PUBLIC core)
# target_link_libraries(highs_model PUBLIC HiGHS::HiGHS)

nanobind_add_module(
  highs_model_ext

  STABLE_ABI NB_STATIC NB_DOMAIN pyoptinterface

  lib/highs_model_ext.cpp
  lib/highs_model_ext_constants.cpp
)
target_link_libraries(highs_model_ext PUBLIC highs_model)
install(TARGETS highs_model_ext LIBRARY DESTINATION ${POI_INSTALL_DIR})

# IPOPT
add_library(ipopt_model STATIC)
target_sources(ipopt_model PRIVATE
  include/pyoptinterface/ipopt_model.hpp
  lib/ipopt_model.cpp
)
target_link_libraries(ipopt_model PUBLIC nlexpr nleval)

nanobind_add_module(
  ipopt_model_ext

  STABLE_ABI NB_STATIC NB_DOMAIN pyoptinterface

  lib/ipopt_model_ext.cpp
)
target_link_libraries(ipopt_model_ext PUBLIC ipopt_model)
install(TARGETS ipopt_model_ext LIBRARY DESTINATION ${POI_INSTALL_DIR})

# stub
nanobind_add_stub(
  core_ext_stub
  INSTALL_TIME
  MODULE pyoptinterface._src.core_ext
  OUTPUT ${POI_INSTALL_DIR}/core_ext.pyi
)

nanobind_add_stub(
  nlexpr_ext_stub
  INSTALL_TIME
  MODULE pyoptinterface._src.nlexpr_ext
  OUTPUT ${POI_INSTALL_DIR}/nlexpr_ext.pyi
)

nanobind_add_stub(
  nleval_ext_stub
  INSTALL_TIME
  MODULE pyoptinterface._src.nleval_ext
  OUTPUT ${POI_INSTALL_DIR}/nleval_ext.pyi
)

nanobind_add_stub(
  cppad_interface_ext_stub
  INSTALL_TIME
  MODULE pyoptinterface._src.cppad_interface_ext
  OUTPUT ${POI_INSTALL_DIR}/cppad_interface_ext.pyi
)

nanobind_add_stub(
  tcc_interface_ext_stub
  INSTALL_TIME
  MODULE pyoptinterface._src.tcc_interface_ext
  OUTPUT ${POI_INSTALL_DIR}/tcc_interface_ext.pyi
)

nanobind_add_stub(
  gurobi_model_ext_stub
  INSTALL_TIME
  MODULE pyoptinterface._src.gurobi_model_ext
  OUTPUT ${POI_INSTALL_DIR}/gurobi_model_ext.pyi
)

nanobind_add_stub(
  copt_model_ext_stub
  INSTALL_TIME
  MODULE pyoptinterface._src.copt_model_ext
  OUTPUT ${POI_INSTALL_DIR}/copt_model_ext.pyi
)

nanobind_add_stub(
  mosek_model_ext_stub
  INSTALL_TIME
  MODULE pyoptinterface._src.mosek_model_ext
  OUTPUT ${POI_INSTALL_DIR}/mosek_model_ext.pyi
)

nanobind_add_stub(
  highs_model_ext_stub
  INSTALL_TIME
  MODULE pyoptinterface._src.highs_model_ext
  OUTPUT ${POI_INSTALL_DIR}/highs_model_ext.pyi
)

nanobind_add_stub(
  ipopt_model_ext_stub
  INSTALL_TIME
  MODULE pyoptinterface._src.ipopt_model_ext
  OUTPUT ${POI_INSTALL_DIR}/ipopt_model_ext.pyi
)

set(ENABLE_TEST_MAIN OFF BOOL "Enable test c++ function with a main.cpp")
if(ENABLE_TEST_MAIN)
    add_executable(test_main lib/main.cpp)
    target_link_libraries(test_main PUBLIC core nleval cppad_interface)
endif()