问题
I have Python3 installed via brew install python3. However, cmake cannot find PythonLibs 3. Here's the header of my CMakeLists.txt.
cmake_minimum_required(VERSION 3.0)
find_package(PythonLibs 3 REQUIRED)
When I ran cmake, I got this error message
Could NOT find PythonLibs: Found unsuitable version "2.7.6", but required is at least "3" (found /usr/lib/libpython2.7.dylib)
Not sure what I did wrong.
回答1:
In my experience, this happened because I was using an older version of cmake (2.8 instead of 3+) that didn't know about Python 3.4 (it gave up after 3.3.)
The solution was to go into the CMakeLists.txt file and add an "additional versions" directive ABOVE the find_package:
set(Python_ADDITIONAL_VERSIONS 3.4)
find_package(PythonLibs 3 REQUIRED)
You could probably also fix it by upgrading your version of cmake. But the above worked for me with cmake 2.8
回答2:
Another reason for this is that CMake can't ever find Python 3 when it is installed from brew on OSX. It looks like the CMake devs know that FindPythonLibs sucks and have a ticket to revamp it but it doesn't look like it will happen any time soon.
I believe the Python interpreter itself knows where its libraries and headers are so I think the best thing to do would be to run it to find out. To get the path to the Python interpreter I would force the user to specify it manually. One of the big issues with Python is that lots of software includes its own copy so you'll end up with 5 copies of it on your system. The chance of picking up the wrong one is just too high. Get the user to specify the correct one.
来源：https://stackoverflow.com/questions/29245558/how-to-link-with-python3-libs-with-cmake