[...stuff...]
thread.c:667: warning: passing argument 1 of 'rb_ensure' from incompatible pointer type
cc -dynamic -bundle -undefined suppress -flat_namespace -o ../../.ext/i686-darwin9.4.0/thread.bundle thread.o -L"." -L"../.." -L.     -ldl -lobjc
cp ../.././ext/thread/lib/thread.rb ../../.ext/common
compiling tk
*****************************************************************************
**
** PTHREAD SUPPORT MODE ERROR:
**
**   Ruby is not compiled with --enable-pthread, but your Tcl/Tk
**   library seems to be compiled with pthread support. This
**   combination may cause frequent hang or segmentation fault
**   errors when Ruby/Tk is working. We recommend that you NEVER
**   create the library with such a combination of pthread support.
**
**   Please recompile Ruby with the "--enable-pthread" configure option
**   or recompile Tcl/Tk with the "--disable-threads" configure option.
**
*****************************************************************************
[...stuff...]