[CMake] OSX deployment target confusion for 2.8.10

[Matthew Brett]

Hi,

Please forgive my ignorance of cmake, but I am running into trouble on
OSX with 2.8.10 and cmake-2.8.10.20121101-gafe0-Darwin64-universal
(but not 2.8.9).

In fact I am trying to compile PySide-1.1.2 :

http://pypi.python.org/pypi/PySide
http://pypi.python.org/packages/source/P/PySide/PySide-1.1.2.tar.gz#md5=885f8cf2e4c0c46b76568f0c1eae5c43

(if you want to try this you need something like the appended patch to
get started.
To compile I am doing:
tar xxvf PySide-1.1.2.tar.gz
patch -p0 < the-attached-patch
cd PySide-1.1.2.tar.gz
python setup.py install
- with Python.org Python 2.7
)

For cmake 2.8.9 and with no OSX related env variables, the compilation
proceeds (with unrelated errors later on).

For cmake 2.8.10 I get this:

Creating module build folder
/Users/mb312/tmp/pyside2/PySide-1.1.2/pyside_build/py2.7-qt4.8.3-64bit-release/shiboken...
Configuring module shiboken
(/Users/mb312/tmp/pyside2/PySide-1.1.2/sources/shiboken)...
cmake -G Unix Makefiles -DQT_QMAKE_EXECUTABLE=/usr/bin/qmake
-DBUILD_TESTS=False -DDISABLE_DOCSTRINGS=True
-DCMAKE_BUILD_TYPE=Release
-DCMAKE_INSTALL_PREFIX=/Users/mb312/tmp/pyside2/PySide-1.1.2/pyside_install/py2.7-qt4.8.3-64bit-release
/Users/mb312/tmp/pyside2/PySide-1.1.2/sources/shiboken
-DPYTHON_EXECUTABLE=/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python
-DPYTHON_INCLUDE_DIR=/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7
-DPYTHON_LIBRARY=/Library/Frameworks/Python.framework/Versions/2.7/lib/libpython2.7.dylib
-DCMAKE_INSTALL_RPATH_USE_LINK_PATH=yes
-- The C compiler identification is GNU 4.2.1
-- The CXX compiler identification is GNU 4.2.1
CMake Error at /Applications/CMake
2.8-10.app/Contents/share/cmake-2.8/Modules/Platform/Darwin.cmake:189
(message):
  CMAKE_OSX_DEPLOYMENT_TARGET is '10.6' but CMAKE_OSX_SYSROOT:

   ""

  is not set to a MacOSX SDK with a recognized version.  Either set
  CMAKE_OSX_SYSROOT to a valid SDK or set CMAKE_OSX_DEPLOYMENT_TARGET to
  empty.
Call Stack (most recent call first):
  /Applications/CMake
2.8-10.app/Contents/share/cmake-2.8/Modules/CMakeSystemSpecificInformation.cmake:36
(include)
  CMakeLists.txt:2 (project)


-- Configuring incomplete, errors occurred!
error: Error configuring shiboken

I should clarify that:

$ echo $CMAKE_OSX_DEPLOYMENT_TARGET

$ echo $CMAKE_OSX_SYSROOT

$ echo $MACOSX_DEPLOYMENT_TARGET

If I do:

export CMAKE_OSX_SYSROOT=/Developer/SDKs/MacOSX10.6.sdk/

and then run from a fresh install, I get the same error including:

CMake Error at /Applications/CMake
2.8-10.app/Contents/share/cmake-2.8/Modules/Platform/Darwin.cmake:189
(message):
  CMAKE_OSX_DEPLOYMENT_TARGET is '10.6' but CMAKE_OSX_SYSROOT:

   ""

  is not set to a MacOSX SDK with a recognized version.  Either set
  CMAKE_OSX_SYSROOT to a valid SDK or set CMAKE_OSX_DEPLOYMENT_TARGET to
  empty

If I:

$ unset CMAKE_OSX_SYSROOT
$ export MACOSX_DEPLOYMENT_TARGET=10.5

and restart _from a freshly unpacked directory as above_ I get the
following error:

Creating module build folder
/Users/mb312/tmp/pyside2/PySide-1.1.2/pyside_build/py2.7-qt4.8.3-64bit-release/shiboken...
Configuring module shiboken
(/Users/mb312/tmp/pyside2/PySide-1.1.2/sources/shiboken)...
cmake -G Unix Makefiles -DQT_QMAKE_EXECUTABLE=/usr/bin/qmake
-DBUILD_TESTS=False -DDISABLE_DOCSTRINGS=True
-DCMAKE_BUILD_TYPE=Release
-DCMAKE_INSTALL_PREFIX=/Users/mb312/tmp/pyside2/PySide-1.1.2/pyside_install/py2.7-qt4.8.3-64bit-release
/Users/mb312/tmp/pyside2/PySide-1.1.2/sources/shiboken
-DPYTHON_EXECUTABLE=/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python
-DPYTHON_INCLUDE_DIR=/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7
-DPYTHON_LIBRARY=/Library/Frameworks/Python.framework/Versions/2.7/lib/libpython2.7.dylib
-DCMAKE_INSTALL_RPATH_USE_LINK_PATH=yes
error: $MACOSX_DEPLOYMENT_TARGET mismatch: now "10.5" but "10.6"
during configure

If I:

$ unset MACOSX_DEPLOYMENT_TARGET
$ export CMAKE_OSX_DEPLOYMENT_TARGET=10.5

I get the same error message as originally, including:

-- The CXX compiler identification is GNU 4.2.1
CMake Error at /Applications/CMake
2.8-10.app/Contents/share/cmake-2.8/Modules/Platform/Darwin.cmake:189
(message):
  CMAKE_OSX_DEPLOYMENT_TARGET is '10.6' but CMAKE_OSX_SYSROOT:

   ""

  is not set to a MacOSX SDK with a recognized version.  Either set
  CMAKE_OSX_SYSROOT to a valid SDK or set CMAKE_OSX_DEPLOYMENT_TARGET to
  empty.

If I grep for 'DEPLOYMENT' in the PySide sources, I find nothing - so
I do not believe these variables are being set by PySide.

So, in my situation at least, I believe cmake 2.8.10 (not 2.8.9) is
ignoring CMAKE_OSX_DEPLOYMENT_TARGET and CMAKE_OSX_SYSROOT, and
setting CMAKE_OSX_DEPLOYMENT_TARGET unconditionally without setting
CMAKE_OSX_SYSROOT.

Is that possible?  Is there something else I can do to debug?

Best,

Matthew



diff -u PySide-1.1.2-orig/setup.py PySide-1.1.2/setup.py
--- PySide-1.1.2-orig/setup.py	2012-09-07 06:51:47.000000000 -0700
+++ PySide-1.1.2/setup.py	2012-11-03 18:45:18.000000000 -0700
@@ -245,11 +245,12 @@
                 py_abiflags = getattr(sys, 'abiflags', None)
                 py_library = os.path.join(py_libdir, "libpython%s%s.so" % \
                     (py_version, py_abiflags))
-            else:
+            else: # Python 2
                 py_library = os.path.join(py_libdir, "libpython%s%s.so" % \
                     (py_version, dbgPostfix))
                 if not os.path.exists(py_library):
                     py_library = py_library + ".1"
+        py_library =
'/Library/Frameworks/Python.framework/Versions/2.7/lib/libpython2.7.dylib'
         if not os.path.exists(py_library):
             raise DistutilsSetupError(
                 "Failed to locate the Python library %s" % py_library)