Hi Michael, thank you for your quick answer. I found that the xft font library used by Tk is requiring a link with ImageIO which causes the trouble. The fix could then be to compile a new version of Tk without the xft font library. ./configure --enable-framework --disable-xft (Tcl/Tk as a framework) ./configure --disable-xft (X11 lib)
Unfortunately there is a documented bug in python on mac when one uses self installed Tcl/Tk libraries (http://bugs.python.org/msg74544) One needs to fix the setup.py file in the python source, by putting the /System/Library underneath /Library/Frameworks in the function detect_tkinter_darwin (another option would be to install the X11 version of Tcl/Tk) but then one would also need to modify setup.py by commenting out detect_tkinter_darwin in detect_tkinter. In both cases, one needs to modify the Python setup.py included in the sage distribution. What is the best way for doing that ? Cheers, Eric On 12 jan, 15:16, mabshoff <michael.absh...@mathematik.uni- dortmund.de> wrote: > On Jan 12, 5:56 am, sonnen <sonne...@gmail.com> wrote: > > Hi Eric, > > > Tkinter is not available on the binary distribution of Sage for Mac OS > > 10.5 (Intel). > > As I wanted to use the TkAgg backend for matplotib I compiled Sage > > from the source. However then again import Tkinter failed (even though > > tk8.4 is installed as a framework). I noticed that _tkinter.so was > > compiled properly, but was replaced > > bu _tkinter_failed.so as import _tkinter did not work because it could > > not > > find symbol __cg_png_create_info_struct referenced in ImageIO and > > expected > > in sage-3.2.3/local/lib/libPng.dylib > > Yeah, this is a known issue. > > > I found a fix on an apple support > > listhttp://lists.apple.com/archives/Unix-porting/2008/Sep/msg00033.html > > This isn't a fix since it only work on case sensitive filesystems and > as long as Apple ships cases insensitive ones we are out of luck. > Other suggested workarounds like setting something via rpath or > playing games with env variables also doesn't work or breaks easily > when for example moving the Sage install. > > > The workaround is to rename libpng.dylib from sage and recompile > > python using > > sage -f python-2.5.2.p! > > and matplotlib > > sage -f matplotlib-0.98.3.p4 > > and everything seems to work. > > I don't think it will since there are doctests that depend on "our" > libpng. It might be a 10.4 specific issue, but nonetheless we chose to > go with a dynamic libpng even though it creates a certain amount of > problems. It fixed a number of issues, but it introduced those issues > you are hitting. The real solution would probably be to get our hands > on the modifications made by Apple to libpng but AFAIK no one has > found them yet. Maybe nobody has made a serious effort to get them > either. In the end it should be possible to build tcl/tk not as > framework, but that might be some work. I haven't tried and the way it > looks right now I am not going to have time to look into this any time > soon. > > > It would be nice if this could be fixed properly, maybe by giving > > another name > > to libpng.dylib in the mac distribution, and the version with tkinter > > included > > in the binary distribution. > > This won't work as mentioned above. One way is to link statically, but > that provides its own set of problems. > > > Eric Sonnendrucker > > Cheers, > > Michael --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
