Guile 2.0.1: scm_init_guile() broken on Mac OS X 10.6.7

[Hans Aberg]

On Mac OS X 10.6.7, compiled using Xcode Version 3.2.6 64-bit, 
i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1, scm_init_guile() gives the error:
  Failed to get stack base for current thread.
The program 'guile' works, though. And scm_init_guile() works in Guile 2.0.0.

(On this platform, there is a later clang/llvm based compiler, that comes with 
Xcode 4.)

Hans