Bug#709181: Could NOT find PythonLibs (missing: PYTHON_INCLUDE_DIRS)

[Scott Kitterman]

On Tuesday, May 21, 2013 03:24:27 PM Modestas Vainius wrote:
> Hello,
> 
> On 2013 m. of May 21 d., Tuesday 15:01:17 Mathieu Malaterre wrote:
> > Package: cmake
> > Version: 2.8.7-4~bpo60+1
> 
> Why are you using sqeeuze-bpo cmake version on sid and expect everything to
> work?
> 
> > However the following now fails (sid, libpython2.7 >= 2.7.5-4)
> > 
> > 
> > $ cmake  -DPYTHON_INCLUDE_DIR=/usr/include/python2.7
> > -DPYTHON_LIBRARY=/usr/lib/python2.7/config-x86_64-linux-gnu/libpython2.7.s
> > o .. CMake Error at
> > /usr/share/cmake-2.8/Modules/FindPackageHandleStandardArgs.cmake:108
> > (message): Could NOT find PythonLibs (missing: PYTHON_INCLUDE_DIRS) (found
> > version "2.7.5")
> > 
> > Call Stack (most recent call first):
> >   /usr/share/cmake-2.8/Modules/FindPackageHandleStandardArgs.cmake:315
> > 
> > (_FPHSA_FAILURE_MESSAGE)
> > /usr/share/cmake-2.8/Modules/FindPythonLibs.cmake:208
> > (FIND_PACKAGE_HANDLE_STANDARD_ARGS) CMakeLists.txt:2 (find_package)
> 
> You need 2.8.11-1 or later to get support for multi-arched python. What is
> more, to support your scenario you may need to set PYTHON_INCLUDE_DIR2 for
> it as well.
> 
> However, even then, I give no guarentees that this will work. Multiarch
> Python patch is kind of crappy and I still need to figure out what to do
> with it.

Could you try this (on top of what's in 2.8.11):

--- cmake-2.8.11.orig/Modules/FindPythonLibs.cmake
+++ cmake-2.8.11/Modules/FindPythonLibs.cmake
@@ -18,6 +18,7 @@
 # the following cache variables:
 #  PYTHON_LIBRARY             - path to the python library
 #  PYTHON_INCLUDE_DIR         - path to where Python.h is found
+#  PYTHON_INCLUDE_DIR2        - path to where pyconfig.h is found
 
 #=============================================================================
 # Copyright 2001-2009 Kitware, Inc.
@@ -121,6 +122,13 @@ foreach(_CURRENT_VERSION ${_Python_VERSI
       "Path to where Python.h is found" FORCE)
   endif()
 
+  # For backward compatibility, set PYTHON_INCLUDE_DIR2 to the value of
+  # PYTHON_INCLUDE_DIR when not set.
+  if(DEFINED PYTHON_INCLUDE_DIR AND NOT DEFINED PYTHON_INCLUDE_DIR2)
+    set(PYTHON_INCLUDE_DIR2 "${PYTHON_INCLUDE_DIR}" CACHE PATH
+      "Path to where pyconfig.h is found" FORCE)
+  endif()
+
   set(PYTHON_FRAMEWORK_INCLUDES)
   if(Python_FRAMEWORKS AND NOT PYTHON_INCLUDE_DIR)
     foreach(dir ${Python_FRAMEWORKS})

I think that will solve the backward compatibility issue in the patch.

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