GMP and 64-bit systems

[Torbjorn Granlund]

Vincent Lefevre <vincent at vinc17.org> writes:

  > 2) Have configure edit gmp.h, e.g., insert
  >      #define __GMP_LONG_LONG_SIZE 1
  >    when relevant.  Note that we already edit gmp.h for other things.
  
  Yes, since gmp.h is already edited, I'd say that this is the best
  solution.
  
Yes, it is simple and safe.

  > (I should perhaps mention that it would be nice to get rid of this
  > gmp.h editing, and have everything wrok right from compiler options.
  > Unfortunately, we have not managed to get that to work reliably.)
  
  Any example of problems?
  
Various ABI clashes in a system.  Multilibs will not work.

-- 
Torbjörn