Waltibaba · February 7, 2017 13:46
diff --git a/wrong python version args - with cmake b/wrong python version args - with cmake
 http://stackoverflow.com/questions/15291500/i-have-2-versions-of-python-installed-but-cmake-is-using-older-version-how-do

 EITHER:
 find_package( PythonLibs 2.7 REQUIRED ) # if it already has a find_package(PythonLibs)

 OR:
 needed to use  python2.7 to compile an older library, but cmake keeps picking up my python3.2 libraries (and executable).
 First, I ran cmake with default options, then edited the CMakeCache.txt file which it generated. I did it this way primarily because I didn't know the proper -D... incantations to cause cmake to get the python library and include paths, etc right in the first place.
 In my CmakeCache.txt, I found lines like this

  PYTHON_EXECUTABLE:FILEPATH=/usr/bin/python
  PYTHON_INCLUDE_DIR:PATH=/usr/include/python3.2
  PYTHON_LIBRARY:FILEPATH=/usr/lib/libpython3.2.so

 And replaced every occurrence of python3.2 with python2.7. I also had to rename the PYTHON_EXECUTABLE to use python2.7, since python is a symlink to python3.2 on my system.

  PYTHON_EXECUTABLE:FILEPATH=/usr/bin/python2
  PYTHON_INCLUDE_DIR:PATH=/usr/include/python2.7 
  PYTHON_LIBRARY:FILEPATH=/usr/lib64/libpython2.7.so
  
 Then I reran cmake. Because it prefers its cached values to actually looking for the libraries, this should work in all cases. At least, it did in mine.
	http://stackoverflow.com/questions/15291500/i-have-2-versions-of-python-installed-but-cmake-is-using-older-version-how-do

	EITHER:
	find_package( PythonLibs 2.7 REQUIRED ) # if it already has a find_package(PythonLibs)

	OR:
	needed to use python2.7 to compile an older library, but cmake keeps picking up my python3.2 libraries (and executable).
	First, I ran cmake with default options, then edited the CMakeCache.txt file which it generated. I did it this way primarily because I didn't know the proper -D... incantations to cause cmake to get the python library and include paths, etc right in the first place.
	In my CmakeCache.txt, I found lines like this

	PYTHON_EXECUTABLE:FILEPATH=/usr/bin/python
	PYTHON_INCLUDE_DIR:PATH=/usr/include/python3.2
	PYTHON_LIBRARY:FILEPATH=/usr/lib/libpython3.2.so

	And replaced every occurrence of python3.2 with python2.7. I also had to rename the PYTHON_EXECUTABLE to use python2.7, since python is a symlink to python3.2 on my system.

	PYTHON_EXECUTABLE:FILEPATH=/usr/bin/python2
	PYTHON_INCLUDE_DIR:PATH=/usr/include/python2.7
	PYTHON_LIBRARY:FILEPATH=/usr/lib64/libpython2.7.so

	Then I reran cmake. Because it prefers its cached values to actually looking for the libraries, this should work in all cases. At least, it did in mine.