bug#9713: emacs 24.0.90 alloc.c assertion failure

[Karl Berry]

(If there's a different place to report pretest bugs, please inform.
Saw nothing in the README.)

Trying to compile the emacs 24.0.90 pretest on (the latest) CentOS 5.7,
the assertion at line 740 of alloc.c fails:
verify (INT_MAX <= PTRDIFF_MAX);

With the system compiler (gcc version 4.1.2 20080704 (Red Hat 4.1.2-51)),
the error is;
alloc.c:740: error: negative width in bit-field '_gl_verify_error_if_negative'

With gcc 4.6.1 compiled from the original sources, the error is:
alloc.c:740:1: error: static assertion failed: "verify (INT_MAX <= PTRDIFF_MAX)"


I tried removing the verify() call, just to see.  Unfortunately, then
temacs either got a segmentation fault (system compiler) or failed to
link with multiple definitions of g_bit_nth_lsf and many more g_bit_*
functions (4.6.1).

karl