#35141: py*-scipy + gcc45: ___ieee_divdc3 symbol not found --------------------------------+-------------------------------- Reporter: andre.dos.anjos@… | Owner: macports-tickets@… Type: defect | Status: new Priority: Normal | Milestone: Component: ports | Version: 2.1.1 Resolution: | Keywords: Port: py26-scipy | --------------------------------+-------------------------------- Comment (by wimmer@…): Replying to [comment:12 Peter.Danecek@…]:
Replying to [comment:10 wimmer@…]:
Let me note that I get the same problem for python 2.7 on OSX 10.8 when I install from source using "port install -s py27-scipy", instead of installing the prebuilt version. I looked into the problem, and figured out that the problem is due to the fact that scipy compiles all code with the macports gcc/gfortran, but when building the shared library object spline.so links with clang - hence the symbol {{{___ieee_divdc3}}} which is specific to gcc is not found. In fact, clang is used for all modules based on C-code (not Fortran code). You can see this in the attached build.log.
Well, if this is really due to the fact that clang is used for linking, why this would happen on a 10.5 system? As far as I remember there is no clang, yet.
It is clang on my 10.8, could be gcc-4.2 on 10.5, for example. Also, it might depend on the python version, as different python versions have different logic on figuring out which compiler to use (python usually wants to compile things with the same compiler as it is compiled itself) ... it is possible that the problem for python2.7 only shows up since a very recent update of python2.7. In any case {{{___ieee_divdc3}}} is apparently a GNU gcc symbol, and the error is also in the previous cases probably due to the linker not linking against the GNU gcc libraries (as probably an Apple compiler was used for linking). -- Ticket URL: <https://trac.macports.org/ticket/35141#comment:14> MacPorts <http://www.macports.org/> Ports system for OS X