在OS X上使用CMake的Boost Python

我在OS X上嘗試這個boost python with cmake的例子。這篇文章有點舊，但是我找不到更新的東西。我的目標是使用CMake（因爲我使用CLion）來構建C++和Python庫的集成項目。我使用Python 2.7在OS X上在OS X上使用CMake的Boost Python

我.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()

最後，我打開一個Python控制檯，並嘗試此

from ctypes import * 
ly = cdll.LoadLibrary("libyay.dylib") 
print ly.yay()

產生此錯誤：

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

關於（a）整合C++和Python的整個方法是否過時，（b）這個錯誤應該告訴我什麼以及（c）使用CMake的其他方法，我將不勝感激。

來源

2016-11-11 Brian Dolan

關鍵似乎是我的Python版本無法加載由make生成的.dylib文件。我不知道爲什麼，所以我用這一招在的CMakeLists.txt文件，包括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 "")

做cmake和make我能夠打開一個Python shell並運行後

import greet_ext 
greet_ext.greet()

我已在github上發佈完整示例。此外，我還要感謝野生雞的a useful post

來源

2016-11-13 01:24:07

在OS X上使用CMake的Boost Python

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