[Bug ada/50842] [4.7 Regression] gnatmake fails to link in stage3 with undefined symbol _iconv_close

[iains at gcc dot gnu.org]

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).