cmake发现错误的python库

问题描述

我是从c ++程序调用python脚本：

  #include< Python.h> 
 ... 
 Py_Initialize（）; 
 PyRun_SimpleFile（...）; 
 Py_Finalize（）; 
  

我的cmake文件中对应的cmake条目是：

  FIND_PACKAGE（PythonLibs REQUIRED）
 ... 
 TARGET_LINK_LIBRARIES（MyApplication $ {PYTHON_LIBRARIES}）
  pre> 
 
 
这只要我的python脚本没有使用任何安装到site-packages目录中的模块，否则我会得到一个ImportError。 显示如何查找site-packages目录的位置与CMake，但我应该告诉CMake做它吗？
 
 
 
编辑：问题解决。原来的FIND_PACKAGE（PythonLibs）发现一个不同的python安装从我通常使用（/usr/local/lib/libpython2.7.dylib而不是/Library/Frameworks/Python.framework/Versions/2.7/lib/libpython2。 7.dylib  - 我在mac），这是如何获得标准的python模块，但没有一个我自己安装。要将PYTHONPATH更改回正常，我添加了
 尝试：
 import some_package 
 b $ b如果sys.path中的my_python_path：raise 
 sys.path.append（my_python_path）
  
 
 
 
你可以告诉cmake在哪里可以找到这个PythonLibs通过指定一个python脚本的顶部。
解决方案
 python库的路径如下：
  cmake -DPYTHON_LIBRARIES = / Library / Frameworks / Python.framework / lib / libpython2.7.dylib。 
  
这样会将cmake中的$ {PYTHON_LIBRARIES}设置为正确的路径。
 
 
 
要找出哪些其他可能的选项（PYTHON_LIBRARIES），您可以给cmake（使用-DARG选项）尝试运行
  ccmake。 
  
然后按 c  code> t 用于高级选项。
 
 
 
例如，您也可以设置
  -DPYTHON_LIBRARY ='/ softwarepath / Python / Python2.7 / lib / libpython2.7.so'
 -DPYTHON_INCLUDE ='/ softwarepath / Python / Python2 .7 / include'
  
 
I'm new to CMake and have trouble understanding some usage concepts.
I'm calling a python script from a c++ program:
#include <Python.h>
...
Py_Initialize();
PyRun_SimpleFile(...);
Py_Finalize();
The corresponding cmake entries in my cmake file are:
FIND_PACKAGE(PythonLibs REQUIRED)
...
TARGET_LINK_LIBRARIES(MyApplication ${PYTHON_LIBRARIES})
This works as long as my python script isn't using any modules installed into the site-packages directory, otherwise I get an ImportError. This question shows how to find the location of the site-packages directory with CMake, but what should I tell CMake to do with it?
EDIT: Problem solved. Turns out FIND_PACKAGE(PythonLibs) finds a different python installation from what I'm normally using (/usr/local/lib/libpython2.7.dylib instead of /Library/Frameworks/Python.framework/Versions/2.7/lib/libpython2.7.dylib - I'm on mac), which is how I get standard python modules, but none that I installed myself. To change the PYTHONPATH back to normal, I added
try:
  import some_package
except ImportError:
  if "my_python_path" in sys.path: raise
  sys.path.append("my_python_path")
at the top of my python script.
 解决方案 
you can tell cmake where to find this PythonLibs by specifying the path to your python libraries like this:
cmake -DPYTHON_LIBRARIES=/Library/Frameworks/Python.framework/Versions/2.7/lib/libpython2.7.dylib .
this will then set the ${PYTHON_LIBRARIES} inside cmake to the right path.
To find out which other possible options (besided PYTHON_LIBRARIES) you can give to cmake (with the -DARG option) try running 
ccmake .
Then press c to configure, and t for advanced options.
For example, you also might want to set 
-DPYTHON_LIBRARY='/softwarepath/Python/Python2.7/lib/libpython2.7.so'
-DPYTHON_INCLUDE='/softwarepath/Python/Python2.7/include'
                        
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