Problem with __gmp_expr

[Torbjorn Granlund]

Marc Glisse <marc.glisse at inria.fr> writes:

  By the way, do we have a policy about breaking binary compatibility?
  In this case, mixing old and new objects could result in crashes
  (almost certainly at -O0, seldom at -O3). It should be possible to
  prevent this issue by renaming __gmp_unary_expr and __gmp_binary_expr
  (say adding a '2' at the end). It wouldn't be 100%, but I think only
  questionable code would break.
  
I don't think we need to support compiling foo.cc with one GMP release
and bar.cc with another, and then link the objects to some
libgmpxx.{so,a}.

Torbjörn
Please encrypt, key id 0xC8601622