http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50842
--- Comment #9 from Iain Sandoe <iains at gcc dot gnu.org> 2011-10-27 19:42:42 UTC --- 1/ FTR on *-darwin9 and x86_64-darwin10 (default system configurations, bar GCC pre-requisites). I can bootstrap from the 'macada' 4.3 or the Adacore libre 4.5 compilers with or without --with-libiconv-prefix=/xxx and with it pointed to /usr or to /opt/local (macports) or /sw64 (fink). 2/ I specifically don't allow macports/fink to add to my PATHs so that I can test GCC against a 'standard' OSX distribution - unless I specifically append one of them 3/ I have sneakily provided Ada in the uploaded gfortran distributions : http://gcc.gnu.org/wiki/GFortranBinaries (for darwin 9 & 10). 4/ I am not disputing that there are issues for other folk - - I have a hunch that the places to look are (a) library PATHS being set by <your favorite> distro. (b) library paths embedded in the GMP/MPFR/MPC shared objects. ... I haven't been able to reproduce the problem yet (but I haven't yet tried a 'full' install of fink including allowing it to set paths).