Question

我正在尝试构建受here启发的示例

我的初衷是能够从Python内部调用C ++代码。我只是运行Boost文档中的示例以实现此目标。

这是我的makefile

CXX               := g++
CXX_FLAGS         := -Wall -Wextra -std=c++17 -ggdb

BIN               := bin
SRC               := src
INCLUDE           := inc
LIB               := lib

BOOST_ROOT        := /home/eicossa/repo/boost_install
BOOST_INCL        := ${BOOST_ROOT}/include/
BOOST_LIBS        := ${BOOST_ROOT}/libs/ 

PYTHON_INCL       := /usr/include/python3.7m/
PYTHON_LIBS       := /usr/lib/python3.7/

LIBFLAGS          := -lboost_system 
EXECUTABLE        := greet


all: $(BIN)/$(EXECUTABLE)

run: clean all
        clear
        ./$(BIN)/$(EXECUTABLE)

$(BIN)/$(EXECUTABLE): $(SRC)/*.cpp 
        $(CXX) $(CXX_FLAGS) -I$(PYTHON_INCL) -I$(INCLUDE) -I$(BOOST_INCL) -L$(BOOST_LIBS) -L$(PYTHON_LIBS) -L$(LIB$

clean:
        -rm $(BIN)/*

这会导致以下错误

/tmp/ccNVjFX3.o：在函数boost::python::api::object::object()': /home/eicossa/repo/boost_install/include/boost/python/object_core.hpp:400: undefined reference to _ Py_NoneStruct'中/tmp/ccQNpbxG.o：在函数中   PyInit_hello_ext': /home/eicossa/Dropbox/wtcd/license/boost/src/bindings.cpp:3: undefined reference to boost :: python :: detail :: init_module（PyModuleDef＆，无效   （）（））'/tmp/ccQNpbxG.o：在函数boost::python::type_info::name() const': /home/eicossa/repo/boost_install/include/boost/python/type_id.hpp:160: undefined reference to中的boost :: python :: detail :: gcc_demangle（char   const ）'/tmp/ccQNpbxG.o：在函数中   boost::python::to_python_value<char const* const&>::operator()(char const* const&) const': /home/eicossa/repo/boost_install/include/boost/python/converter/builtin_converters.hpp:157: undefined reference to boost :: python :: converter :: do_return_to_python（char const *）'   /tmp/ccQNpbxG.o：在函数boost::python::to_python_value<char const* const&>::get_pytype() const': /home/eicossa/repo/boost_install/include/boost/python/converter/builtin_converters.hpp:157: undefined reference to PyUnicode_Type'中/tmp/ccQNpbxG.o：在函数中   void boost::python::def<char const* (*)()>(char const*, char const* (*)())': /home/eicossa/repo/boost_install/include/boost/python/def.hpp:91: undefined reference to boost :: python :: detail :: scope_setattr_doc（char   const *，boost :: python :: api :: object const＆，char const *）'   /tmp/ccQNpbxG.o：在函数`boost :: python :: api :: object中   boost :: python :: detail :: make_function_aux


（char const *（*）（），boost :: python :: default_call_policies const＆，boost :: mpl :: vector1 const＆）'：     /home/eicossa/repo/boost_install/include/boost/python/make_function.hpp:38：     未定义的引用     boost::python::objects::function_object(boost::python::objects::py_function const&)' /tmp/ccQNpbxG.o: In function boost :: python :: objects :: py_function_impl_base :: py_function_impl_base（）'：     /home/eicossa/repo/boost_install/include/boost/python/object/py_function.hpp:20：     对vtable for boost::python::objects::py_function_impl_base' /tmp/ccQNpbxG.o:(.rodata._ZTVN5boost6python7objects23caller_py_function_implINS0_6detail6callerIPFPKcvENS0_21default_call_policiesENS_3mpl7vector1IS6_EEEEEE[_ZTVN5boost6python7objects23caller_py_function_implINS0_6detail6callerIPFPKcvENS0_21default_call_policiesENS_3mpl7vector1IS6_EEEEEE]+0x30): undefined reference to boost :: python :: objects :: py_function_impl_base :: max_arity（）const的未定义引用”     /tmp/ccQNpbxG.o：在功能中     boost::python::objects::caller_py_function_impl<boost::python::detail::caller<char const* (*)(), boost::python::default_call_policies, boost::mpl::vector1<char const*> > >::~caller_py_function_impl()': /home/eicossa/repo/boost_install/include/boost/python/object/py_function.hpp:30: undefined reference to boost :: python :: objects :: py_function_impl_base ::〜py_function_impl_base（）'     /tmp/ccQNpbxG.o:(.rodata._ZTIN5boost6python7objects23caller_py_function_implINS0_6detail6callerIPFPKcvENS0_21default_call_policiesENS_3mpl7vector1IS6_EEEEEE[_ZTIN5boost6python7对象_call_py_EE_EE_EE_EE_IP_6_EE_EE_EE_IP_6_EE1_EP_6_EE_IP_6_EE1_IE_EE_EE_IP_6_7     对typeinfo for boost::python::objects::py_function_impl_base' /tmp/ccQNpbxG.o: In function boost :: python :: converter :: expected_pytype_for_arg :: get_pytype（）'的未定义引用：     /home/eicossa/repo/boost_install/include/boost/python/converter/pytype_function.hpp:69：     未定义的引用     boost::python::converter::registry::query(boost::python::type_info)' /home/eicossa/repo/boost_install/include/boost/python/converter/pytype_function.hpp:70: undefined reference to boost :: python :: converter :: registration :: expected_from_python_type（）     const'collect2：错误：ld返回1退出状态Makefile：27：配方     目标“ bin / greet”失败的原因：*** [bin / greet]错误1

我在做什么错了？

Answer 1

CXX               := g++
CXX_FLAGS         := -Wall -Wextra -std=c++17 -ggdb

BIN               := bin
SRC               := src
INCLUDE           := inc
LIB               := lib

BOOST_ROOT        := /home/eicossa/repo/boost_install
BOOST_INCL        := ${BOOST_ROOT}/include/
BOOST_LIBS        := ${BOOST_ROOT}/libs/ 

PYTHON_INCL       := /usr/include/python3.7m/
PYTHON_LIBS       := /usr/lib/python3.7/

LIBFLAGS          := -lboost_system  -lboost_python37 -lpython3.7m #changes made here
EXECUTABLE        := greet


all: $(BIN)/$(EXECUTABLE)

run: clean all
        clear
        ./$(BIN)/$(EXECUTABLE)

$(BIN)/$(EXECUTABLE): $(SRC)/*.cpp 
        $(CXX) $(CXX_FLAGS) -I$(PYTHON_INCL) -I$(INCLUDE) -I$(BOOST_INCL) -L$(BOOST_LIBS) -L$(PYTHON_LIBS) -L$(LIB$

clean:
        -rm $(BIN)/*

尝试在Makefile中进行这些更改

编译时将错误与Boost.python链接

1 个答案: