> > Again, installing libjpeg.dylib and/or libpng.dylib into $SAGE_LOCAL/ > > lib has bad side effects on OS X, due to the use of DYLD_LIBRARY_PATH > > in the Sage framework overall. So, maybe make it an optional spkg, > > but having it as a required or standard spkg would be bad. > > We already install libpng.dylib standard in all copies of Sage on OS > X. There were issues, but they got sorted out a while ago. > > -- William
The reason this works on OS X is that the Sage version of the library is called libpng12.dylib, while the system version is libpng.dylib. This numbering is now built-in to libpng, but not to the jpeg libraries, so the same process won't protect you. Basically, you can't safely override the library names you find in /System/Library/Frameworks/ApplicationServices.framework/Versions/A/ Frameworks/ImageIO.framework/Resources/, which are libjp2.dylib, libjpeg.dylib, libopenexr.dylib, libpng.dylib, libradience.dylib, libtiff.dylib, and libgif.dylib. By "override", I mean have libraries with the same name (differing only in case) prior to these libraries on the DYLD_LIBRARY_PATH. The version of libpng in /System is 1.4.3 on both my Leopard system and my Lion system. The version in sage-4.7.2 is 1.2.35. But the library name is different, so there's no problem. -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
