Hi Robert, Thanks for looking into this.
--- On Thu, 18/12/08, Robert Osfield <robert.osfi...@gmail.com> wrote: <snip> > The core OSG library does link against the MATH_LIBRARY, > but the other > non of the other core libraries do. Apparently not on MacOSX using cmake :) Take a look at src/osgText/CMakeFiles/osgText.dir/link.txt without the change you just made. In fact take a look at any of the link.txt files for each OSG library. Thay all have /usr/lib/libm.dylib in there. > I've added a entry of > MATH_LIBRARY into the linking of osgText. Could you do an > svn update > and see if the error is fixed? I got the svn version and no it doesn't fix it. All it does is move the /usr/lib/libm.dylib reference on the link line to a different place! > The fact you've got errors but others under OSX > haven't reported this > (including myself) suggests that must be something else > going w.r.t > gcc/SDK's you are using on your machine. I'm sorry I haven't explained this well enough. The goal here is to *not* have any explicit reference to libm.dylib on the link line. The symbols reside in the SDK version of the library at /Developer/SDKs/MacOSX10.4u.sdk/usr/lib/libm.dylib and *not* necessarily at /usr/lib/libm.dylib which is what the MATH_LIBRARY is set to. This is fine for UNIX but not Mac as it should be the former that is used for a consistent build (if there are Mac developers out there who disagree please correct me - I'm new to this). By omitting the explicit reference to libm.dylib the Mac build system takes care of this automatically and gets the symbols from the SDK version of the library. Users who are not seeing this problem have all the symbols they require in /usr/lib/libm.dylib and are, as I understand it, lucky ;) Paul > Robert. > > On Thu, Dec 18, 2008 at 2:01 PM, Paul Fotheringham > <osg_u...@yahoo.co.uk> wrote: > > Hi, > > > > The error is > > > > Linking CXX shared library ../../lib/libosgText.dylib > > ld: Undefined symbols: > > _acl_copy_ext_native referenced from CarbonCore > expected to be defined in libSystem > > _acl_copy_int_native referenced from CarbonCore > expected to be defined in libSystem > > _task_name_for_pid referenced from CarbonCore expected > to be defined in libSystem > > > > It depends on the configuration of your system and > whether the SDK versions of the libraries match the system > ones. On some OSX systems it will build fine and on some it > won't. It all depends on whether the SDK libs are in > sync. with the system ones as regards having all the > required symbols. > > > > The link to the blog entry in my first email explains > this better than I can. As I understand it, the systems that > work are simply getting away with it as the symbols required > by the build process just happen to be all there in the > system libraries. They ought to be consistently getting them > from the SDK libraries. > > > > Paul > > > > --- On Thu, 18/12/08, Robert Osfield > <robert.osfi...@gmail.com> wrote: > > > >> From: Robert Osfield > <robert.osfi...@gmail.com> > >> Subject: Re: [osg-users] Build error on MAc OSX > 10.4 and OSG 2.7.4 > >> To: osg_u...@yahoo.co.uk, "OpenSceneGraph > Users" <firstname.lastname@example.org> > >> Date: Thursday, 18 December, 2008, 10:28 AM > >> HI Paul, > >> > >> On Thu, Dec 18, 2008 at 8:33 AM, Paul Fotheringham > >> <osg_u...@yahoo.co.uk> wrote: > >> > Hi Robert, > >> > > >> > I just tried 2.7.7 and it's still an > issue there. > >> Maybe only the Xcode project was fixed up? > >> > >> It's the CMake projects that have the math > library > >> added. Last week I > >> did some work comiling under OSX via a remote log > in, both > >> OpenSceneGraph and Present3D (that depends upon > >> OpenSceneGraph) > >> compiled fine using Cmake. > >> > >> Could you be specific about what error you are > seeing and > >> whereabouts > >> in the OSG build? > >> > >> Robert. > > > > > > > > _______________________________________________ > > osg-users mailing list > > email@example.com > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > _______________________________________________ osg-users mailing list firstname.lastname@example.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org