我正在OS X上使用cmake示例尝试这种增强型python。帖子有点旧，但是我找不到更新的内容。我的目标是使用CMake（因为我正在使用CLion）来构建C ++和Python库的集成项目。我在OS X上使用Python 2.7
我的.cpp文件是
#include <boost/python.hpp>
char const* yay()
{
return "Yay!";
}
BOOST_PYTHON_MODULE(libyay)
{
using namespace boost::python;
def("yay", yay);
}
我的CMakesLists.txt
CMAKE_MINIMUM_REQUIRED(VERSION 3.3)
IF(NOT CMAKE_BUILD_TYPE)
SET(CMAKE_BUILD_TYPE "DEBUG")
#SET(CMAKE_BUILD_TYPE "RELEASE")
#SET(CMAKE_BUILD_TYPE "RELWITHDEBINFO")
#SET(CMAKE_BUILD_TYPE "MINSIZEREL")
ENDIF()
FIND_PACKAGE(PythonLibs 2.7 REQUIRED)
FIND_PACKAGE(Boost)
IF(Boost_FOUND)
INCLUDE_DIRECTORIES("${Boost_INCLUDE_DIRS}" "/usr/include/python2.7")
SET(Boost_USE_STATIC_LIBS OFF)
SET(Boost_USE_MULTITHREADED ON)
SET(Boost_USE_STATIC_RUNTIME OFF)
FIND_PACKAGE(Boost COMPONENTS python)
ADD_LIBRARY(yay SHARED yay.cpp)
TARGET_LINK_LIBRARIES(yay ${Boost_LIBRARIES} ${PYTHON_LIBRARIES})
ELSEIF(NOT Boost_FOUND)
MESSAGE(FATAL_ERROR "Unable to find correct Boost version. Did you set BOOST_ROOT?")
ENDIF()
IF(CMAKE_COMPILER_IS_GNUCXX)
ADD_DEFINITIONS("-Wall")
ELSE()
SET(CMAKE_CXX_FLAGS "-Wall")
MESSAGE("You have compiler " ${CMAKE_CXX_COMPILER_ID})
#MESSAGE(FATAL_ERROR "CMakeLists.txt has not been tested/written for your compiler.")
MESSAGE("CMakeLists.txt has not been tested/written for your compiler.")
ENDIF()
最后，我打开一个Python控制台并尝试执行此操作
from ctypes import *
ly = cdll.LoadLibrary("libyay.dylib")
print ly.yay()
产生此错误：
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/Cellar/python/2.7.12_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ctypes/__init__.py", line 375, in __getattr__
func = self.__getitem__(name)
File "/usr/local/Cellar/python/2.7.12_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ctypes/__init__.py", line 380, in __getitem__
func = self._FuncPtr((name_or_ordinal, self))
AttributeError: dlsym(0x7fdb5344aec0, yay): symbol not found
对于以下方面的指导，我将不胜感激：（a）用于集成C ++和Python的整个方法是否过时；（b）该错误应该告诉我什么；以及（c）使用CMake的其他方法。
关键似乎是我的Python版本在加载.dylibmake生成的文件时遇到问题。我不知道为什么，所以我在CMakeLists.txt文件中使用了这个技巧，并包含了if(APPLE)命令
cmake_minimum_required( VERSION 3.3 )
project( BoostPythonHelloWorld )
# Make a .so output!
if(APPLE)
set(CMAKE_SHARED_LIBRARY_SUFFIX ".so")
endif(APPLE)
# Find necessary packages
find_package( PythonLibs 2.7 REQUIRED )
include_directories( ${PYTHON_INCLUDE_DIRS} )
find_package( Boost COMPONENTS python REQUIRED )
include_directories( ${Boost_INCLUDE_DIR} )
# Build our library
add_library( greet SHARED greet.cpp )
# Define the wrapper library that wraps our library
add_library( greet_ext SHARED greet_ext.cpp )
target_link_libraries( greet_ext ${Boost_LIBRARIES} ${PYTHON_LIBRARIES} greet )
# don't prepend wrapper library name with lib
set_target_properties( greet_ext PROPERTIES PREFIX "" )
完成后cmake，make我能够打开Python Shell并运行
import greet_ext
greet_ext.greet()
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